Search

CN-115012926-B - Cutting arm and cutting head device of hard rock heading machine for advanced grooving and alternate cutting

CN115012926BCN 115012926 BCN115012926 BCN 115012926BCN-115012926-B

Abstract

The invention discloses a hard rock heading machine cutting arm and cutting head device for advanced grooving and alternate cutting, which comprises cutting heads, a parallelogram mechanism type double-section cutting arm, two groups of synchronous pitching cylinders and a linkage mechanism of a swinging cylinder, a parallelogram mechanism type double-section cutting arm assembly, a universal joint assembly supported by the bottoms of a pair of cutting arms, a universal joint assembly supported by the tops of a pair of pitching cylinders, a left connecting plate and a right connecting plate which are connected with an upper support plate of the pitching cylinders in a high pair, a telescopic cylinder supporting assembly of the double-section cutting arm, a swinging cylinder supporting assembly and an underframe supporting assembly. The scheme not only reduces the difficulty of cutting and breaking the rock, but also improves the tunneling speed.

Inventors

  • DU MAI
  • WANG HONGXIN
  • DAI NING
  • LIU SONGYONG
  • JIANG HONGXIANG
  • ZUO HUI

Assignees

  • 国科中迈(徐州)能源科技有限公司

Dates

Publication Date
20260505
Application Date
20220520

Claims (8)

  1. 1. The hard rock heading machine cutting arm and cutting head device for advanced grooving and alternate cutting is characterized by comprising a parallelogram mechanical double-section cutting arm assembly, a pair of cutting arm bottom supporting assemblies, a pair of universal joint assemblies supported by the tops of pitching cylinders, a pair of universal joint assemblies supported by the bottoms of pitching cylinders, a swinging cylinder supporting assembly, a telescopic cylinder supporting assembly, a combined cutting head, a left driving sleeve assembly (200), a cutting arm front end cover assembly (400), a front cutting arm assembly (500), a pair of variable length cutting arm assemblies (600), a pair of pitching cylinder assemblies (700), a pair of telescopic cylinder assemblies (800), a chassis supporting assembly (1100) and a right driving sleeve assembly (1200); The combined cutting head comprises a left cutting head and a right cutting head, wherein the left Duan Jiege head and the right cutting head in the combined cutting head are respectively driven to rotate by independent steel ball motors, and the left Duan Jiege head and the right cutting head are opposite in steering; The combined cutting head comprises a left driving sleeve assembly (200), a cutting arm front end cover assembly (400), a right driving sleeve assembly (1200) and a front cutting arm assembly (500) to form a cutting and cutting roller assembly, wherein the cutting head assembly is a combined cutting head for cutting with a cutter advanced cutting groove and a cutting pick at intervals; The top parts of the pair of variable length cutting arm assemblies (600) along the extending direction are rotatably connected with the front cutting arm assembly (500) through a pair of support shafts, the bottom parts of the pair of variable length cutting arm assemblies (600) along the extending direction are connected with the lower cutting arm support assembly (900) through universal joints, The telescopic oil cylinder assemblies (800) are used for driving double-section cutting arm assemblies which are arranged in pairs to realize the axial equivalent extension of a pair of variable-length cutting arm assemblies (600), the upper ends of a pair of pitching oil cylinder assemblies (700) are connected with a pair of variable-length cutting arm support assemblies (600) to form universal joints, the lower ends of a pair of pitching oil cylinder assemblies (700) are connected with a chassis support assembly (1100) to form universal joints, and the equivalent extension of the pair of pitching oil cylinder assemblies (700) and the equivalent extension of the pair of variable-length cutting arm assemblies (600) are combined to control the up-and-down vertical movement of the cutting head; The combined cutting head cuts out a roadway cross section with flat bottom, arc top height of H x and roadway width of L 0 , the maximum displacement of the axis of the cutting head up and down is H g , the outer diameter of the cutting head is D g , the height from the lower supporting axis of the cutting arm to the bottom surface of the roadway is H z , the axial center of the lower supporting axis of the pitching cylinder to the height of the bottom surface of the roadway is H f , the pitching cylinder is a hydraulic cylinder for an HSG type engineering, the shortest length of the pitching cylinder is L f1 , the maximum length of the pitching cylinder is L f2 , the telescopic cylinder is a hydraulic cylinder for the HSG type engineering, the shortest length of the telescopic cylinder is H s , the stroke of the telescopic cylinder is S s , the swinging cylinder is a hydraulic cylinder for the HSG type engineering, the shortest length of the swinging cylinder is H b , the stroke of the swinging cylinder is S b , the maximum elevation angle of the cutting arm is beta gs , the maximum depression angle of the cutting arm is beta gx , the maximum angle of the cutting arm swings leftwards is alpha kz , the maximum angle of the cutting arm swings rightwards is alpha ky , and the axial center of the cutting arm swings downwards to the lower supporting angle is 1 ; The up-and-down swinging of the cutting head is performed when the length of the pitch cylinder is from L f1 to L f2 while the attitude angle of the cutting arm is from beta gx to beta gs , The combined cutting head is vertically moved up and down by controlling the length variable quantity of the pair of pitching oil cylinder assemblies (700) and the pair of telescopic oil cylinder assemblies (800), the length variable quantity of the pair of pitching oil cylinder assemblies (700) and the pair of telescopic oil cylinder assemblies (800) is controlled to be executed by a hydraulic servo system, the parallelogram mechanism type double-section cutting arm assemblies restrict translation cutting of the combined cutting head from left to right for 3-4 times, when the length of a swinging oil cylinder (1007) in the swinging oil cylinder supporting assembly stretches from H b to S b and the swing angle of the cutting arm is from alpha kz to alpha ky , the left-right translation transposition of the cutting head is executed, and the swinging oil cylinder (1007) is positioned at the rear lower part of the underframe supporting assembly (1100).
  2. 2. The advanced grooving and interphase cutting hard rock heading machine cutting arm and cutting head device according to claim 1, wherein the pair of variable length cutting arm components consists of a first cutting arm and a second cutting arm which are symmetrical left and right and have the same structure; The first cutting arm comprises a first cutting arm top side plate (601), a first cutting arm bottom side plate (602), a first cutting arm left side plate (603), a first cutting arm right side plate (604), a first cutting arm front rib plate (605), a telescopic cylinder front left ear seat (606) and a telescopic cylinder front right ear seat (607); The left side plate (603) of the first cutting arm and the right side plate (604) of the first cutting arm are arranged in parallel, the upper part and the lower part of the left side plate (603) of the first cutting arm and the right side plate (604) of the first cutting arm are respectively welded with the top side plate (601) of the first cutting arm and the bottom side plate (602) of the first cutting arm to form a square frame, the upper part in the square frame is welded with the front rib plate (605) of the first cutting arm, and the lower part in the square frame is respectively welded with the front left ear seat (606) of the telescopic oil cylinder and the front right ear seat (607) of the telescopic oil cylinder; The second cutting arm comprises a telescopic oil cylinder rear left ear seat (608), a telescopic oil cylinder rear right ear seat (609), a second cutting arm top side plate (610), a second cutting arm bottom side plate (611), a second cutting arm left side plate (612), a second cutting arm right side plate (613), a second cutting arm left bottom support (625) and a second cutting arm left top support (626); The second section cutting arm left side plate (612) and the second section cutting arm right side plate (613) are arranged in parallel, the upper part and the lower part of the second section cutting arm left side plate (612) and the second section cutting arm right side plate (613) are respectively welded with the second section cutting arm top side plate (610) and the second section cutting arm bottom side plate (611) to form a square frame in a surrounding mode, the lower part in the square frame is respectively welded with the telescopic cylinder rear left ear seat (608) and the telescopic cylinder rear right ear seat (609), the lower end in the square frame is respectively welded with the second section cutting arm left bottom support (625) and the second section cutting arm left top support (626).
  3. 3. The advanced cutting and interphase cutting hard rock heading machine cutting arm and cutting head apparatus as claimed in claim 1, wherein the independent ones of the pair of cutting arm bottom support assemblies include a cutting arm lower center support (901), a cutting arm lower horizontal fulcrum (902), a cutting arm lower end upper fulcrum (903), an upper fulcrum stop plate (904), an upper fulcrum stop plate screw (905), a lower fulcrum sleeve (906), a lower horizontal fulcrum pin (907), a cutting arm lower end lower fulcrum (908), a lower fulcrum stop plate (909), a lower fulcrum stop plate screw (910); The top of the lower center support (901) of the cutting arm forms a revolute pair with the top side plate (610) of the second cutting arm and the left top support (626) of the second cutting arm through the upper support shaft (903) at the lower end of the cutting arm, and the bottom of the lower center support (901) of the cutting arm forms a revolute pair with the bottom side plate (611) of the second cutting arm and the left bottom support (625) of the second cutting arm through the lower support shaft (908) of the lower end of the cutting arm, so that the left-right swing of a pair of variable-length cutting arms relative to a roadway is solved, and the upper support shaft (903) at the lower end of the cutting arm and the lower support shaft (908) of the cutting arm are stepped shafts; The lower horizontal support shaft (902) of the cutting arm is connected with the lower center support (901) of the cutting arm through shaft holes, and is positioned by an upper support shaft (903) at the lower end of the cutting arm and a lower support shaft (908) at the lower end of the cutting arm, two ends of the lower horizontal support shaft (902) of the cutting arm and a left lower support shaft sleeve (906) and a right lower support shaft sleeve (906) form a revolute pair, the left lower support shaft sleeve (906) and the right lower support shaft (1101) of the cutting arm are in interference connection, and a pin roll (907) of the lower horizontal support shaft positions the lower horizontal support shaft (902) of the cutting arm on the underframe support assembly (1100); The pair of variable length cutting arm assemblies (600) perform universal movement in the interval of the maximum elevation angle beta gs of the cutting arm, the maximum depression angle beta gx of the cutting arm and the interval of the maximum depression angle beta gx of the cutting arm lower support axis O 1 , the maximum angle alpha kz of the swing of the pair of variable length cutting arm assemblies (600) to the left of a roadway and the maximum angle alpha ky of the swing of the cutting arm to the right, and the interval of the cutting arm lower support axis O 1 of the pair of variable length cutting arm assemblies (600) and the interval of the maximum depression angle beta gx of the cutting arm and the maximum angle alpha kz of the swing of the cutting arm to the left and the interval of the maximum angle alpha ky of the swing of the cutting arm to the right.
  4. 4. The advanced grooving and interphase cutting hard rock heading machine cutting arm and cutting head device according to claim 1 or 2 is characterized in that the universal joint assembly supported at the top of a single pitching cylinder comprises a second section of cutting arm bottom support (614), a left connecting plate (615), a right connecting plate (616), a connecting plate rear support shaft (616), a pitching cylinder upper support plate (617), a ball head shaft left pressing plate (618), a cutting arm center upper ball head shaft (619), a ball head shaft right pressing plate (620), a connecting plate front support shaft (621), pins (627) of front and rear support shafts, ball head pressing plate bolts (628), ball head pressing plate nuts (629), bottom support right half snap rings (630), bottom support left half snap rings (631), left and right half snap ring pins (632), piston rods (701) of a pitching cylinder upper support shaft (703), and pitching cylinder upper pin shafts (704); The second section cutting arm bottom support (614) is welded below the second section cutting arm bottom side plate (611), a left connecting plate (615) and a right connecting plate (615) form a revolute pair with the second section cutting arm bottom support (614) through a connecting plate rear supporting shaft (616), a pin shaft (627) of a front supporting shaft and a rear supporting shaft positions a connecting plate front supporting shaft (621) on the left connecting plate (615), a cutting arm center upper ball shaft (619) is assembled in a hole in the middle of the left connecting plate (615) in an interference manner, a bottom support right half clamping ring (630) and a bottom support left half clamping ring (631) are clamped in a groove in the upper part of the cutting arm center upper ball shaft (619) and are positioned through left and right half clamping ring pin shafts (632), the cutting arm center upper ball shaft (619) and a pitching oil cylinder upper supporting plate (617) form a spherical pair, the left side and the right lower side surfaces of the left connecting plate (615) are convex arc bodies with the width B s , and the end surface functions of the convex arc bodies are expressed as follows: R st ＝H 2 -H 3 /cosβ gt ; H 2 is the supporting height of the ball head shaft on the center of the cutting arm, H 3 is the supporting height of the support plate on the pitching cylinder, R st is the radial direction of the left and right supporting convex arc end faces, and beta gt is any pitch angle of the cutting arm about the horizontal shaft; the convex arc body and the top surface of the upper support plate (617) of the pitching oil cylinder form a high pair; The upper ball head shaft (619) at the center of the cutting arm is limited by the left ball head shaft pressing plate (618) and the right ball head shaft pressing plate (620) and is fixed with the ball head pressing plate nut (629) through the ball head pressing plate bolt (628), a piston rod (701) of the pitching oil cylinder is rotationally connected with the upper supporting plate (617) of the pitching oil cylinder through the upper supporting shaft (703) of the pitching oil cylinder and is positioned through the upper pin shaft (704) of the pitching oil cylinder, and the upper ball head shaft (619) at the center of the cutting arm, the upper supporting plate (617) of the pitching oil cylinder, the left ball head shaft pressing plate (618) and the right ball head shaft pressing plate (620) form universal transmission.
  5. 5. The hard rock heading machine cutting arm and head assembly for advanced grooving and alternate cutting as claimed in claim 1 or 2, wherein said pitch cylinder bottom supported gimbal assembly includes a pair of pitch cylinder blocks (702), a lower swing cross (1001), a lower cross collar (1002), a lower cross pin (1003), a floor connection bolt (1106), a floor connection nut (1107), a center upper horizontal support (1108), a center upper vertical support (1109), a vertical support pin (1110), a vertical support connection bolt (1111), a vertical support connection nut (1112), a center upper support (1113), a center upper sleeve (1114), a center lower thrust plate (1115), a center lower horizontal support (1116), a center lower support (1117), a center lower sleeve (1118), a rear lateral support (1123); The cylinder body (702) of the pair of pitching cylinders and two sides of the lower swinging cross shaft (1001) form a revolute pair, a lower cross shaft check ring (1002) and a lower cross shaft pin shaft (1003) are arranged at two ends of the lower swinging cross shaft (1001) to realize positioning, a vertical shaft upper section of the lower swinging cross shaft (1001) and a central upper sleeve (1114) form a revolute pair, the central upper sleeve (1114) is in interference fit with a central upper support (1113), the central upper support (1113) is welded with a central upper horizontal support plate (1108), the central upper horizontal support plate (1108) is welded with a central upper vertical support plate (1109), and the central upper vertical support plate (1109) is positioned through a vertical support plate pin shaft (1110) and fixedly connected to a rear transverse support plate (1123) through a vertical support plate connecting bolt (1111) and a vertical support plate connecting nut (1112); The vertical shaft lower section of the lower swing cross shaft (1001) and the central lower sleeve (1118) form a revolute pair, the central lower sleeve (1118) and the central lower support (1117) are in interference fit, the central lower support (1117) and the central lower horizontal support plate (1116) are welded, the central lower horizontal support plate (1116) and the rear transverse support plate (1123) are welded, the central lower horizontal support plate (1116) is fixedly connected to the chassis of the heading machine, the central lower thrust plate (1115) is installed in a hole of the central lower support (1117) in an interference mode and is located on the central lower horizontal support plate (1116), the vertical shaft lower end face of the lower swing cross shaft (1001) and the central lower thrust plate (1115) form a thrust sliding bearing, and the pitching oil cylinder assembly (700) and the frame form a universal joint assembly under the connection of the lower swing cross shaft (1001).
  6. 6. The advanced grooving and interphase cutting hard rock heading machine cutting arm and head device according to claim 1, characterized in that: The swing cylinder supporting assembly comprises a lower cross shaft check ring (1002), a lower cross shaft pin roll (1003), a lower cross shaft swing rod (1004), a swing cylinder front support shaft (1005), a swing cylinder front support shaft (1006), a swing cylinder (1007), a swing cylinder rear support shaft (1008), a swing cylinder rear support shaft (1009), a swing cylinder rear support (1010), a rear longitudinal support plate (1119), a rear support pin roll (1120), a rear support connecting bolt (1121) and a rear support connecting nut (1122); the lower cross shaft swing rod (1004) is in rotary connection with the front section of the lower swing cross shaft (1001), the lower cross shaft swing rod (1004) is in rotary pair through a front support shaft (1005) of the swing cylinder and a piston rod of the swing cylinder (1007) and is positioned through a front pin shaft (1006) of the swing cylinder, a cylinder body of the swing cylinder (1007) is in rotary pair through a rear support shaft (1008) of the swing cylinder and a rear support (1010) of the swing cylinder and is positioned through a rear pin shaft (1009), the rear support (1010) of the swing cylinder is fixedly connected to a rear longitudinal support plate (1119) through a rear support connecting bolt (1121) and a rear support connecting nut (1122) and is positioned through a rear support pin shaft (1120), the lower swing cross shaft (1001) is driven by the expansion of the swing cylinder (1007) to swing at a point of a lower support axis O 2 of the swing cylinder, a pair of swing cylinder assemblies (700) is driven by the swing of the swing cylinder assemblies (1001) to swing at a point O 2 of the lower support axis of the swing cylinder, a pair of swing arm assemblies (700) is driven by the swing of the swing arm assemblies to swing at a point O 1 of the lower support axis O 2 of the swing cylinder, and the swing arm assemblies is driven by the swing arm assemblies to swing joint line to swing at a point of the lower support axis O3535 of the swing axis; The telescopic cylinder support assembly comprises a telescopic cylinder (801), a telescopic cylinder front support shaft (802), a telescopic cylinder front pin shaft (803), a telescopic cylinder rear support shaft (804), a telescopic cylinder rear pin shaft (805), a piston rod of the telescopic cylinder (801) forms a revolute pair with a telescopic cylinder front left lug seat (606) and a telescopic cylinder front right lug seat (607) through the telescopic cylinder front support shaft (802) and is positioned through the telescopic cylinder front pin shaft (803), and a cylinder body of the telescopic cylinder (801) forms a revolute pair with a telescopic cylinder rear left lug seat (608) and a telescopic cylinder rear right lug seat (609) through the telescopic cylinder rear support shaft (804) and is positioned through the telescopic cylinder rear pin shaft (805).
  7. 7. The advanced grooving and interphase cutting hard rock heading machine cutting arm and cutting head device according to claim 1, characterized in that the combined cutting head comprises a left cutting head, a right cutting head and a middle supporting component, cutting tools and cutting picks which are spirally distributed are axially and interphase arranged outside a sleeve of the left cutting head, cutting tools and cutting picks which are spirally distributed are axially and interphase arranged outside a sleeve of the right cutting head, the mounting angles of the cutting tools and cutting picks on the left cutting head are opposite to those of the cutting tools and cutting picks on the right cutting head, The combined cutting head comprises a left inner supporting sleeve (1), a cutting tool assembly (2), a bearing outer ring (3), a roller (4), a bearing inner ring (5), an outer end surface V D -shaped sealing ring (6), a waterway inner seal (7), a waterway outer seal (8), a front cutting arm key (9), a middle supporting sleeve (10), a water supply pipe O-shaped ring (11), a water supply pipe inner joint (12), a water supply pipe outer joint (13), a right inner supporting sleeve (14), an inner supporting O-shaped ring (15), an inner supporting retainer ring (16), a left steel ball motor assembly (100), a left driving sleeve assembly (200), a pick assembly (300), a cutting arm front end cover assembly (400), a front cutting arm front half end cover (401), a front cutting arm assembly (500), a right driving sleeve assembly (1200) and a right steel ball motor assembly (1300); The left inner support sleeve (1) and the right inner support sleeve (14) are axially fixed, and the outer edge surfaces of the left inner support sleeve (1) and the right inner support sleeve (14) are respectively provided with a left driving sleeve assembly (200) and a right driving sleeve assembly (1200) through rollers (4) and a bearing inner ring (5); A left steel ball motor assembly (100) is arranged in the left inner support sleeve (1), the left steel ball motor assembly (100) is used for driving the left drive sleeve assembly (200) to rotate, and a cutting tool assembly (2) and a cutting pick assembly (300) are axially arranged on the left drive sleeve assembly (200); The front end cover assembly (400) of the cutting arm and the front cutting arm assembly (500) are connected through bolts to form a supporting whole; The left steel ball motor assembly (100) comprises a left steel ball motor (101), a motor connecting spline (102), a motor connecting screw (103), a left end thrust ring (104), a left driving sleeve assembly (200) and a left driving sleeve (201), and a water pipe nozzle (202); The left steel ball motor (101) is connected with the left driving sleeve (201) through a motor connecting spline (102), the left steel ball motor (101) is fixedly connected with the left inner supporting sleeve (1) through motor connecting screws (103), the left end thrust ring (104) is an axial thrust ring between the left inner supporting sleeve (1) and the left driving sleeve (201), and the water pipe spray heads (202) are a group and are circumferentially and uniformly distributed on the left driving sleeve (201); The right steel ball motor assembly (1300) comprises a right steel ball motor (1301), a right motor connecting spline (1302), a right motor connecting screw (1303), a right end thrust ring (1304) and a right driving sleeve (1201); A right steel ball motor (1301) is fixedly arranged in the right inner support sleeve (14) through a right motor connecting screw (1303), the right steel ball motor (1301) drives a right driving sleeve assembly (1200) to rotate through a right motor connecting spline (1302), and a right end thrust ring (1304) is a thrust ring between the right inner support sleeve (14) and the right driving sleeve (1201), wherein the right steel ball motor assembly (1300) and the right driving sleeve assembly (1200) are of the same driving structure as the left steel ball motor assembly (100) and the left driving sleeve assembly (200); The bearing inner ring (5) is in small interference fit with the left Duan Waijing of the left inner support sleeve (1), and the bearing outer ring (3) is in small clearance fit with the inner diameter of the right section of the left drive sleeve (201); The cutting arm front end cover assembly (400) comprises a front cutting arm front half end cover (401), a water supply left end sealing piece (402), a water supply left end elastic support piece (403), a water supply right end elastic support piece (404), a water supply right end sealing piece (405), a front half end cover connecting bolt (406), a front half end cover connecting nut (407), a front half end cover connecting gasket (408) and a front half end cover connecting pin shaft (409); the front half end cover (401) of the front cutting arm is provided with a front half end cover axial water hole K zs and a circumferential water groove K sc at two ends of the front half end cover, a water supply left end elastic supporting piece (403) presses a water supply left end sealing piece (402) on the right end face of the left inner supporting sleeve (1), The waterway inner seal (7) is arranged in an outer groove on the right side surface of the left inner support sleeve (1), the waterway outer seal (8) is arranged in an inner groove on the right side surface of the left inner support sleeve (1), the waterway inner seal (7) and the waterway outer seal (8) realize the sealing of a left waterway, when the four circumferential Xiang Jun water distribution holes K tz in the axial direction of the left drive sleeve in the left inner support sleeve (1) fall in an angle alpha p interval of a cutting water spraying area, water is sprayed on the left side of the waterway, the water supply right end elastic support member (404) compresses the water supply right end seal member (405) on the left end surface of the right inner support sleeve (14), and when the four circumferential Xiang Jun water distribution holes K ty in the axial direction of the right drive sleeve of the right inner support sleeve (14) fall in an angle alpha p interval of the cutting water spraying area, the waterway is on the right side; The front cutting arm assembly (500) comprises a front cutting arm rear half end cover (501), an end cover left side connecting plate (502), an end cover right side connecting plate (503), an end cover upper connecting plate (504), a front cutting arm front end support (505), a front end support pivot (506), a support pivot retainer ring (507) and a support pivot O-shaped sealing ring (508); The front cutting arm assembly (500) is respectively connected with a pair of variable length cutting arm assemblies (600) in a rotating way through a pair of front end support shafts (506); The front end of the end cover left connecting plate (502) is welded at the left end of the front cutting arm rear half end cover (501), the rear end of the end cover left connecting plate is welded at the left side of the front cutting arm front end support (505), the front end of the end cover right connecting plate (503) is welded at the right end of the front cutting arm rear half end cover (501), the rear end of the end cover upper connecting plate (504) is welded at the right side of the front cutting arm front end support (505), and the end cover upper connecting plate (504) is welded with the front cutting arm rear half end cover (501), the end cover left connecting plate (502), the end cover right connecting plate (503), the end cover upper connecting plate (504) and the front cutting arm front end support (505); The front half end cover (401) of the front cutting arm is positioned through a front half end cover connecting pin shaft (409), and the front half end cover (401) of the front cutting arm is connected with the rear half end cover (501) of the front cutting arm through a front half end cover connecting bolt (406), a front half end cover connecting nut (407) and a front half end cover connecting gasket (408); the front cutting arm rear half end cover (501) is respectively connected with the left inner support sleeve (1) and the right inner support sleeve (14) through a pair of front cutting arm keys (9); Front cutting arm front half end cover (401) and front cutting arm rear half end cover (501) constitute the front cutting arm end cover, the left end of front cutting arm end cover realizes the rotation seal with left driving sleeve (201) right-hand member face through outer terminal surface V D shape sealing washer (6), the right-hand member of front cutting arm end cover realizes the rotation seal with right driving sleeve (1201) left end face through outer terminal surface V D shape sealing washer (6), the right side and the left side of front cutting arm end cover are mirror image structure, wherein the axial float of left inner support sleeve (1) is restrained through the ladder structure in the left side hole of front cutting arm end cover, the axial float of left driving sleeve (201) is restrained through the ladder structure in the left side hole of front cutting arm end cover.
  8. 8. The advanced grooving and interphase cutting hard rock heading machine cutting arm and head device according to claim 1, characterized in that: The chassis supporting component comprises a lower horizontal support (1101) of a cutting arm, a chassis vertical support plate (1102), a chassis left and right connecting plate (1103), a chassis middle support plate (1104), a chassis side bottom plate (1105), a bottom plate connecting bolt (1106), a bottom plate connecting nut (1107), a rear longitudinal support plate (1119), a rear support pin shaft (1120), a rear support connecting bolt (1121), a rear support connecting nut (1122), a rear transverse support plate (1123), a rear right rib plate (1124) and a rear left rib plate (1125), The chassis vertical support plates (1102) are arranged in pairs left and right, the lower horizontal support (1101) of the cutting arm is respectively welded with the corresponding chassis vertical support plates (1102), the left and right connecting plates (1103) of the chassis are respectively welded on the chassis vertical support plates (1102) arranged in pairs left and right, the middle support plate (1104) of the chassis is welded above the left and right connecting plates (1103) of the chassis and is positioned at the center, The bottom ends of the chassis vertical support plates (1102) which are arranged in pairs on the left and the right are respectively welded with a chassis side bottom plate (1105), a rear transverse support plate (1123) is arranged between the chassis vertical support plates (1102) which are arranged in pairs on the left and the right, the chassis side bottom plate (1105) is connected with a tunneling machine chassis through a bottom plate connecting bolt (1106) and a bottom plate connecting nut (1107), and a channel for conveying rocks by a scraper conveyor is arranged between the lower supporting axle center of a pitching oil cylinder in the middle of a chassis supporting component and the middle upper space of the roadway bottom surface height (H f ).

Description

Cutting arm and cutting head device of hard rock heading machine for advanced grooving and alternate cutting Technical Field The invention relates to the field of combined crushing methods and mechanics for advanced grooving and re-cutting of hard rock roadways, in particular to a cutting arm and a cutting head device of a hard rock heading machine for advanced grooving and alternate cutting. Background The engineering rock mass grading standard GB50218-94 is divided into hard rock and soft rock according to the hardness degree of the rock, wherein the hard rock is further divided into hard rock (such as granite, orthorhombic rock, amphibole, quartz rock and the like) and harder rock (such as marble, dolomite, slate and the like), and the hard rock is various rocks with the Prussian coefficient of 6-15. Full face heading machines of the heading machine have many advantages but cannot open a tunnel section that approximates a rectangular vault. The part of the section heading machine in the heading machine is divided into a longitudinal axis type cantilever heading machine and a transverse axis type cantilever heading machine, the longitudinal axis type cantilever heading machine can open a required tunnel section but needs a plurality of left-right up-down cyclic swinging to complete the cutting of the full section, and the tunneling speed is relatively low; the transverse-axis cantilever tunneling machine can also open a required tunnel section, but the geometric shape in the tunnel advancing direction is similar to a concave spherical crown, the path length of the cutting head is long and the power consumption is long relative to the structure that the section shape is a plane, because the cutting head at two sides is driven by one shaft, the rock to be crushed has only one free face, the shear strength is not obviously weakened under the pressure action of the rock above, the crushing speed is difficult to improve, the working force of the lifting oil cylinder of the cutting arm is high due to the large cutting resistance moment, the structural size is large, otherwise, the rigidity is low, the problems that the cutting heads at two sides of the transverse-axis cantilever tunneling machine are the same in shaft driving are overcome, the cutting heads are designed to be in a structure that the rotating speed of the left-section cutting head is the same as that of the right-section cutting head is opposite in steering, the axis of the cutting head is in translational motion, the axis of the cutting head is in vertical motion, the section shape in the tunnel advancing direction is the plane, the cutting head is only one free face is difficult to cut, the advanced cutting speed of the rock is high due to the fact that the cutting head is in the cutting face, the advanced cutting speed is not weakened, the cutting speed is high, the tunneling speed of the cutting pick is effective, and the tunneling speed is not weakened, and the tunneling speed is not has the cutting cutter is advanced, and the cutting speed is effective. Disclosure of Invention The invention provides the cutting arm and the cutting head device of the hard rock tunneling machine for advanced grooving and alternate cutting, which solve the problem that the current transverse shaft type cantilever tunneling machine takes longer for transposition cutting, and solve the problem that the current cutting pick is difficult to cut a free face rock. The invention adopts the following technical scheme: The invention discloses a cutting arm and cutting head device of a hard rock tunneling machine for advanced grooving and alternate cutting, which comprises a parallelogram mechanical double-section cutting arm assembly, a pair of variable-length cutting arm assemblies, a pair of cutting arm bottom supporting assemblies, a pair of universal joint assemblies supported by the tops of pitching cylinders, a pair of universal joint assemblies supported by the bottoms of pitching cylinders, a swinging cylinder supporting assembly, a telescopic cylinder supporting assembly, a combined cutting head, an underframe supporting assembly, a left driving sleeve assembly, a cutting arm front end cover assembly, a front cutting arm assembly, a pair of pitching cylinder assemblies, a pair of telescopic cylinder assemblies and a right driving sleeve assembly; The combined cutting head comprises a left cutting head and a right cutting head, wherein the left Duan Jiege head and the right cutting head in the combined cutting head are respectively driven to rotate by independent steel ball motors, and the left Duan Jiege head and the right cutting head are opposite in steering; The combined cutting head comprises a left driving sleeve component, a cutting arm front end cover component, a right driving sleeve component and a front cutting arm component, and a cutting and cutting roller component, wherein the cutting head component is a combined cutting head for cutting with a