CN-121993598-A - PTO/PTI device for marine gearbox and marine gearbox

CN121993598ACN 121993598 ACN121993598 ACN 121993598ACN-121993598-A

Abstract

The invention provides a PTO/PTI device for a marine gear box and the marine gear box, comprising a driving meshing gear sleeve, a front axle driving engagement fork, an engagement fork shaft and a front axle rocker arm, wherein one end of the front axle rocker arm is fixedly connected with the engagement fork shaft, the engagement fork shaft is coaxially and fixedly connected with the front axle driving engagement fork, an outer annular groove is arranged at the outer side of the driving meshing gear sleeve, a fork foot of the front axle driving engagement fork extends into the outer annular groove, a spring is arranged in a mounting hole on the circumference of a spline hub, one end of the spring is abutted against the bottom of the mounting hole, the other end of the spring is abutted against a limiting piece, a first limiting groove and a second limiting groove which are matched with the limiting piece are arranged at the inner side of the driving meshing gear sleeve, and an external spline is arranged on the circumference of a PTO/PTI output gear.

Inventors

WU JUNHUA
ZHOU ENMIN
WENG YANXIANG
WANG SHUJUN
LI XINGYA
WANG QIANG
SUN YANLIANG
ZHAO MENG
ZHOU YONG
GUO WANLONG

Assignees

杭州前进齿轮箱集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260212

Claims (10)

1. A PTO/PTI device for a marine gearbox comprises a PTO/PTI shell (1), a PTO/PTI shaft (2) arranged in the PTO/PTI shell (1), a first bearing (3) arranged on the PTO/PTI shaft (2) in sequence, a PTO/PTI output gear (4), a spline hub (5) and a second bearing (6), wherein the output end of the PTO/PTI shaft (2) is used for connecting a generator, the PTO/PTI output gear (4) is sleeved on the PTO/PTI shaft (2) in a hollow mode, the spline hub (5) and the PTO/PTI shaft (2) are coaxially and fixedly rotated synchronously, the first bearing (3) and the second bearing (6) are arranged between the PTO/PTI shaft (2) and the PTI shell (1), the PTO/PTI output gear (4) is in transmission connection with one shaft of the gearbox, and is characterized by further comprising a shifting fork clutch (7), the shifting fork (7) comprises a driving engagement fork (71), a front axle (73) and a rocker arm (74) which is in coaxial fixed and engaged with the front axle (73) and is in fixed and engaged with one end of the rocker axle (73) of the rocker axle (74), the outer side of the driving meshing gear sleeve (71) is provided with an outer annular groove, the inner side of the driving meshing gear sleeve (71) is provided with an inner spline, the driving meshing gear sleeve (71) is in spline connection with the spline hub (5), a fork foot of a front axle driving engagement fork (72) stretches into the outer annular groove, a mounting hole is formed in the circumference of the spline hub (5), a limit spring (75) is mounted in the mounting hole, one end of the limit spring (75) is abutted to the bottom of the mounting hole, the other end of the limit spring is abutted to the limit piece (76), the inner side of the driving meshing gear sleeve (71) is provided with a first limit groove (711) and a second limit groove (712) which are matched with the limit piece (76), and an outer spline is arranged on the circumference of the PTO/PTI output gear (4) close to the side of the spline hub (5); When the engaging fork shaft (73) drives the fork foot to swing towards the direction approaching to the gear box, the driving engagement toothed sleeve (71) slides forwards to be connected with the PTO/PTI output gear (4) through a spline, at the moment, the limiting piece (76) is separated from the first limiting groove (711), the limiting spring (75) is compressed downwards until the driving engagement toothed sleeve (71) slides in place and then pops out to be clamped into the second limiting groove (712), when the engaging fork shaft (73) drives the fork foot to swing towards the direction far away from the gear box, the driving engagement toothed sleeve (71) slides backwards to be separated from the PTO/PTI output gear (4), at the moment, the limiting piece (76) is separated from the second limiting groove (712), and the limiting spring (75) is compressed downwards until the driving engagement toothed sleeve (71) slides in place and pops out to be clamped into the first limiting groove (711).
2. A PTO/PTI apparatus for a marine gearbox according to claim 1, characterized in that the stop (76) is a sphere, the opening diameters of the first stop recess (711) and the second stop recess (712) increasing gradually in the direction from outside to inside.
3. A PTO/PTI arrangement for a marine gearbox according to claim 1, characterized in that the PTO/PTI housing (1) comprises a first housing (11) and a second housing (12), the first housing (11) being provided with a first through-hole on a first side close to the gearbox, the first housing (11) being detachably connected on a second side remote from the gearbox with a first side of the second housing (12), the second side of the second housing (12) being provided with a second through-hole and a third through-hole, the first through-hole and the third through-hole being for the shaft of the gearbox in driving connection with the PTO/PTI output gear (4) to pass through, the second through-hole being for the output of the PTO/PTI shaft (2) to pass through.
4. A PTO/PTI device for a marine gearbox according to claim 3, characterised in that the first housing (11) is provided with a first oil passage (81), the second housing (12) is provided with a second oil passage, the interior of the PTO/PTI shaft (2) is axially provided with a third oil passage (82), the oil inlet of the first oil passage (81) is connected with the oil pump (95), the oil outlet is led to the third oil passage (82), the third oil passage (82) is communicated with a first oil-dividing passage and a second oil-dividing passage, the oil outlet of the first oil-dividing passage is arranged between the inner ring of the first bearing (3) and the PTO/PTI housing (1), the oil outlet of the second oil-dividing passage is arranged between the inner ring of the second bearing (6) and the PTO/PTI housing (1), the oil inlet of the second oil passage is connected with the oil pump (95), and the oil outlet of the second oil passage is arranged on the wall of the third through hole.
5. A marine gearbox comprising a gearbox body and a PTO/PTI arrangement for a marine gearbox as claimed in any of claims 1 to 4 provided on the gearbox body.
6. A marine gearbox as claimed in claim 5, further comprising a housing (91) and an input shaft member (92), a drive shaft member (93) and an output shaft member (94) disposed within the housing (91), the input shaft member (92) comprising an input shaft (921), a right-hand drive gear (922) coaxially fixed to the input shaft (921), a first drive gear (923) and a first clutch (924) which are hollow over the input shaft (921), the right-hand drive gear (922) being coupled to or decoupled from the first drive gear (923) by the first clutch (924), the drive shaft member (93) comprising a drive shaft (931), a left-hand drive gear (932) coaxially fixed to the drive shaft (931), a second drive gear (933) and a second clutch (934), the left-hand drive gear (932) being coupled to or decoupled from the second drive gear (933) by the second clutch (934), the output shaft member (94) comprising an output shaft (1) and an output gear (941) coaxially fixed to the output shaft (942), the output gear (942) being in mesh with the first drive gear (942) and the second drive gear (942) respectively, the input end of the input shaft (921) is in transmission connection with the engine, the other end of the input shaft (921) is in transmission connection with the oil pump assembly, one end of the transmission shaft (931) is supported on the box body (91), and the other end of the transmission shaft (931) is in transmission connection with the PTO/PTI output gear (4).
7. The marine gearbox of claim 6, wherein a cavity is formed between a gear shaft of the first driving gear (923) and a gear shaft of the right-handed transmission gear (922), the first clutch (924) is arranged in the cavity, the first clutch (924) comprises a first piston (9241), a first return spring (9242), a first spring seat (9243), a first clutch seat (9244), a first bearing plate (9245) and a friction plate group, the friction plate group comprises a first inner friction plate (9246) and a first outer friction plate (9247), the first inner friction plate (9246) is in spline connection with the first clutch seat (9244), the first clutch seat (9244) is in spline connection with the first driving gear (923), one side of the friction plate group, which is close to the bottom of the cavity, is provided with a first piston (9241), one side of the friction plate group, which is far away from the bottom of the cavity, is provided with a first pressing plate (9245), the first bearing plate (9245) is arranged on the inner side of the friction plate group, which is in axial direction between the first bearing plate (9245) and the first driving gear (9241) and the first driving gear (9244) and the first driving gear (9241) is in spline connection, the first bearing plate (9235) is arranged on the inner side of the cavity, the first bearing plate (9245) and the first driving gear (9241) is in axial direction, the first bearing plate is in contact with the first bearing gap, and the piston (9241), the other end of the inner side of the piston is abutted against one end of the first return spring (9242), the other end of the first return spring (9242) is abutted against the first spring seat (9243), and the first spring seat (9243) is limited by a retainer ring fixed on the input shaft (921).
8. A marine gearbox as set forth in claim 7, wherein a cavity is formed between the gear shaft of the second drive gear (933) and the gear shaft of the left-hand drive gear (932), the second clutch (934) is disposed in the cavity, the second clutch (934) comprises a second piston (9341), a second return spring (9342), a second spring seat (9343), a second clutch base (9344), a second bearing plate (9345) and a friction plate set, the friction plate set comprises a second inner friction plate (9346) and a second outer friction plate (3996), the second inner friction plate (9346) is in splined connection with the second clutch base (9344), the second clutch base (9344) is in splined connection with the second drive gear (933), one side of the friction plate set near the bottom of the cavity is provided with a second piston (9341), one side of the friction plate set far away from the bottom of the cavity is provided with a second pressure plate (9345), the second pressure plate (9345) is in axial connection with the second piston (9341) and the second drive gear (9344) is in axial contact with the second drive gear (9341) and is in axial contact with the second piston (9341) at one end of the transmission shaft (9341), the other end of the inner side of the piston is abutted against one end of the second return spring (9342), the other end of the second return spring (9342) is abutted against the second spring seat (9343), and the second spring seat (9343) is limited by a retainer ring fixed on a transmission shaft (931).
9. A marine gearbox according to claim 8, characterised in that a first oil distribution bushing (936) is arranged between the drive shaft (931) and the wall of the third through hole in the second housing (12), that a second oil passage in the second housing (12) is connected to the first working oil passage (84) and the first lubrication oil passage (86) in the drive shaft (931) via the oil distribution bushing, and that the oil outlet of the first working oil passage (84) opens into the space between the second piston (9341) and the left-handed drive gear (932).
10. The marine gearbox as recited in claim 8, wherein the oil pump assembly comprises an oil pump driving gear coaxially and fixedly connected with the input shaft (921), and an oil pump driven gear meshed with the oil pump driving gear, wherein the oil pump driven gear is coaxially and fixedly connected with the input shaft of the oil pump (95), the oil pump driving gear and the oil pump driven gear are arranged in the oil pump shell, the oil pump shell comprises a third shell (937) and a fourth shell (938), the third shell (937) is detachably connected with the box (91), the fourth shell (938) is detachably connected with the third shell (937), the oil pump driving gear and the oil pump driven gear are arranged in the fourth shell (938), the input shaft (921) penetrates through a shaft hole in the third shell (937) and is coaxially and fixedly connected with the oil pump driving gear, a fourth oil way (83) is arranged on the third shell (937), a second split oil bushing (925) is arranged between the shaft hole in the third shell (937) and the input shaft (921), and the fourth oil way (83) on the third shell (937) is communicated with the working piston (85) through the second split oil bushing (921) to the working gap (85).

Description

PTO/PTI device for marine gearbox and marine gearbox Technical Field The invention relates to the technical field of marine gearboxes, in particular to a PTO/PTI device for a marine gearbox and the marine gearbox. Background The Yangtze river is the inland with the first world rank of freight traffic, is the main body of inland shipping in China, the Yangtze river water system ships in China account for more than 80% of inland ships, the key of inland carbon reduction is in the Yangtze river, and the main body of the Yangtze river carbon reduction is in the ships. Current Yangtze river basin inland vessels are about 11.5 tens of thousands, 70% over 15 years of age, and shipping "decarbonization" is urgent. At present, new ships built in inland also actively respond to national energy conservation and emission reduction calls, and search for a green ship road. The Yangtze river voyage has the characteristics of 'water supply and water discharge', and the situation difference of each voyage section in a single pass is larger. In order to improve ship maneuvering performance, the main engine arrangement of the middle and large cargo ship is generally left and right double engines, main engine type selection power is generally larger in consideration of the limit sailing condition of the beach, average effective load rate is lower, main engine power richness is large, and PTO components can be added to collect rich capacity. The PTO component on the conventional marine gearbox is mainly a hydraulic control and wet multi-plate friction clutch if the clutch is required, and the clutch is connected or disconnected by operating the control valve like the main clutch of the marine gearbox, so that the defects of long response time, easiness in connection with the connection and the like are overcome, and a mechanism for protecting the output end of the PTO cannot be better, and if a shaft generator is connected, the PTI function can be increased, but the abrasion of the generator is easily caused, so that the service life is reduced. Disclosure of Invention In order to solve the technical problems, the invention aims to provide a PTO/PTI device for a marine gearbox and the marine gearbox, which have the advantages of simple structure, convenient operation, stable and reliable clutch function and protection of a generator. In order to achieve the above purpose, the present invention adopts the following technical scheme: A PTO/PTI device for a marine gearbox comprising: the PTO/PTI shell, a PTO/PTI shaft arranged in the PTO/PTI shell, a first bearing, a PTO/PTI output gear, a spline hub and a second bearing which are sequentially arranged on the PTO/PTI shaft, wherein the output end of the PTO/PTI shaft is used for being connected with a generator, the PTO/PTI output gear is sleeved on the PTO/PTI shaft, the spline hub and the PTO/PTI shaft are coaxially and fixedly rotated synchronously, the first bearing and the second bearing are arranged between the PTO/PTI shaft and the PTO/PTI shell, the PTO/PTI output gear is in transmission connection with one shaft of the gear boxes, the PTO/PTI shaft also comprises a shifting fork clutch, the shifting fork clutch comprises a driving meshing gear sleeve, a front axle driving jointing fork, a jointing fork shaft and a front axle rocker arm, one end of the front axle rocker arm is fixedly connected with the jointing fork shaft, the front axle connecting rocker arm is used for driving the connecting fork shaft to rotate, the connecting fork shaft is coaxially and fixedly connected with the front axle driving connecting fork, an outer annular groove is formed in the outer side of the driving meshing gear sleeve, an inner spline is formed in the inner side of the driving meshing gear sleeve, the driving meshing gear sleeve is in spline connection with the spline hub, a fork foot of the front axle driving connecting fork extends into the outer annular groove, a mounting hole is formed in the circumference of the spline hub, a spring is mounted in the mounting hole, one end of the spring is abutted to the bottom of the mounting hole, the other end of the spring is abutted to the limiting piece, a first limiting groove and a second limiting groove which are matched with the limiting piece are formed in the inner side of the driving meshing gear sleeve, and an outer spline is arranged on the circumference of the PTO/PTI output gear close to the side of the spline hub; when the engaging fork shaft drives the fork foot to swing towards the direction close to the gear box, the driving meshing gear sleeve slides forwards to be connected with the PTO/PTI output gear through a spline, at the moment, the limiting piece is separated from the first limiting groove, the spring is compressed downwards until the driving meshing gear sleeve slides in place and then is ejected to be clamped into the second limiting groove, when the engaging fork shaft drives the fork foot to swing towards the dire