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CN-224214641-U - RV speed reduction structure with high input precision

CN224214641UCN 224214641 UCN224214641 UCN 224214641UCN-224214641-U

Abstract

The utility model provides a RV (RV) speed reducing structure with high input precision, which relates to the technical field of speed reducing devices and comprises a pin gear housing, an output shaft, an output end cover, two cycloid gears, at least two eccentric shafts arranged in a circumferential array, an input shaft and a needle roller, wherein one end of the input shaft, which is close to the output end cover, is provided with the input gear, the end part of the eccentric shaft is provided with a planet wheel meshed with the input gear, one end of the input shaft, which is far away from the input gear, is connected with a connecting shaft coaxially arranged with the input gear, a motor is arranged on the connecting shaft through a screw, a supporting bearing is respectively arranged between the outer wall of the input shaft and an inner hole of the output shaft and the inner hole of the output end cover, or two supporting bearings are respectively arranged between the outer wall of the input shaft and the inner hole of the output end cover, and a first deviation correcting structure or a second deviation correcting structure is arranged between the connecting shaft and the input shaft. The utility model can improve the stability and coaxiality of the installation connection of the input shaft and the motor, is convenient for the rapid installation of the input shaft and the motor, improves the positioning precision and the input precision, and prolongs the service life of the motor.

Inventors

  • GU JINGJUN
  • JI SHIFEI

Assignees

  • 南通振康机械有限公司

Dates

Publication Date
20260508
Application Date
20250604

Claims (7)

  1. 1. A RV speed reduction structure with high input precision comprises a pin gear housing (01), an output shaft (02), an output end cover (03), two cycloid gears (04), at least two eccentric shafts (05) arranged in a circular array and an input shaft (06), wherein the two cycloid gears (04) are arranged on two cams of the eccentric shafts (05), the cycloid gears (04) are meshed with the pin gear housing (01) through needle rollers (011), one end, close to the output end cover (03), of the input shaft (06) is provided with an input gear (061), the end part of the eccentric shaft (05) is provided with a planet wheel (051) meshed with the input gear (061), and the RV speed reduction structure is characterized in that one end, far away from the input gear (061), of the input shaft (06) is connected with a connecting shaft (1) coaxially arranged with the input gear (061), a motor is arranged on the connecting shaft (1) through screws, and a supporting bearing (062) is respectively arranged between the outer wall of the input shaft (06) and the inner hole of the output shaft (02) and the inner hole of the output end cover (03), or the outer wall of the input shaft (06) is provided with two supporting bearings (062), and a second correcting structure (08) is arranged between the two supporting shafts (07).
  2. 2. The RV speed reducing structure with high input precision according to claim 1, wherein the first deviation correcting structure (07) comprises a spline shaft (3) coaxially arranged with an input shaft (06), an inner hole of the spline shaft (3) is meshed with the outer wall of the input shaft (06) through spline teeth, the spline shaft (3) is detachably mounted at one end, close to the input shaft (06), of the connecting shaft (1) through screws, a mounting ring (2) coaxial with the spline shaft is arranged between the spline shaft (3) and the connecting shaft (1), a first positioning membrane ring (4) coaxial with the mounting ring is arranged between the mounting ring (2) and the end portion of the connecting shaft (1), and a second positioning membrane ring (5) coaxial with the mounting ring is arranged between the mounting ring (2) and the spline shaft (3).
  3. 3. The RV speed reducing structure with high input precision according to claim 2, wherein four first yielding holes (41) penetrating through the first positioning film ring (4) along the axial direction of the first positioning film ring are formed in a circumferential array, two first threaded holes (11) and two first counter bores (12) are formed in the connecting shaft (1), the two first threaded holes (11) are symmetrically arranged at 180 degrees, the two first counter bores (12) are symmetrically arranged at 180 degrees, the two first threaded holes (11) and the two first counter bores (12) are circumferentially arrayed and arranged at intervals, and the two first threaded holes (11) and the two first counter bores (12) are also communicated with the four first yielding holes (41) one by one and are coaxially arranged; The mounting ring (2) is provided with two second threaded holes (21) and two second counter bores (22) which penetrate through the mounting ring along the axial direction of the mounting ring, the two second threaded holes (21) are in one-to-one correspondence with the two first counter bores (12) and are coaxially communicated through corresponding first yielding holes (41), and the two second counter bores (22) are in one-to-one correspondence with the two first threaded holes (11) and are coaxially communicated through corresponding first yielding holes (41); The connecting shaft (1) is provided with first bosses (13) corresponding to the two first threaded holes (11), the end face, close to the connecting shaft (1), of the mounting ring (2) is provided with second bosses (23) corresponding to the two second threaded holes (21), first screws (14) are arranged in the corresponding first threaded holes (11), first yielding holes (41) and second countersinks (22), nuts of the first screws (14) sink into the second countersinks (22), one side, close to the connecting shaft (1), of the first positioning film ring (4) is in contact with the two first bosses (13), second screws (24) are arranged in the corresponding second threaded holes (21), the first yielding holes (41) and the first countersinks (12), and one side, close to the mounting ring (2), of the first positioning film ring (4) is in contact with the two second bosses (23).
  4. 4. The RV speed reducing structure with high input precision according to claim 3, wherein four second yielding holes (51) penetrating through the second positioning film ring (5) along the axial direction of the second positioning film ring are formed in a circumferential array mode, two third threaded holes (31) and two third counter bores (32) are formed in the spline shaft (3), the two third threaded holes (31) are symmetrically arranged at 180 degrees, the two third counter bores (32) are symmetrically arranged at 180 degrees, the two third threaded holes (31) and the two third counter bores (32) are circumferentially arrayed and are arranged at intervals, and the two third threaded holes (31) and the two third counter bores (32) are correspondingly communicated with the four second yielding holes (51) one by one and are coaxially arranged; The mounting ring (2) is provided with two fourth threaded holes (25) and two fourth counter bores (26) which penetrate the mounting ring along the axial direction of the mounting ring, the two fourth threaded holes (25) are in one-to-one correspondence with the two third counter bores (32) and are coaxially communicated through corresponding second yielding holes (51), the two fourth counter bores (26) are in one-to-one correspondence with the two third threaded holes (31) and are coaxially communicated through corresponding second yielding holes (51), the two second threaded holes (21), the two fourth threaded holes (25), the two second counter bores (22) and the two fourth counter bores (26) on the mounting ring (2) are circumferentially arranged in an array, and the fourth threaded holes (25) and the fourth counter bores (26) are respectively positioned between the adjacent second threaded holes (21) and the second counter bores (22); The novel spline shaft is characterized in that a third boss (33) corresponding to the two third threaded holes (31) is arranged on the spline shaft (3), a fourth boss (27) corresponding to the two fourth threaded holes (25) is arranged on the end face, close to the spline shaft (3), of the mounting ring (2), a third screw (34) is arranged in the corresponding third threaded holes (31), second yielding holes (51) and fourth counter bores (26), a nut of the third screw (34) is sunk into the fourth counter bores (26), one side, close to the spline shaft (3), of the second positioning film ring (5) is in contact with the two third bosses (33), a fourth screw (28) is arranged in the corresponding fourth threaded holes (25), second yielding holes (51) and third counter bores (32), and one side, close to the mounting ring (2), of the second positioning film ring (5) is sunk into the third counter bores (32), and is in contact with the two fourth bosses (27).
  5. 5. The RV-deceleration structure with high input precision according to claim 2, wherein the first positioning film ring (4) and the second positioning film ring (5) comprise a plurality of elastic films (6) arranged along the axial array, and the side walls of the adjacent elastic films (6) close to each other are in contact with each other.
  6. 6. The RV-deceleration structure with high input precision according to claim 1, wherein the second deviation rectifying structure (08) comprises spheroidal spline teeth (7) arranged between an inner hole of the connecting shaft (1) and the outer wall of the input shaft (06), tooth shapes of the spheroidal spline teeth (7) are uniformly drum-shaped, and the tooth shapes are in meshing operation and are close to point contact.
  7. 7. The RV deceleration structure with high input accuracy according to claim 1, wherein said supporting bearing (062) is one of a deep groove ball bearing, an angular contact ball bearing, a tapered roller bearing or a cylindrical roller bearing.

Description

RV speed reduction structure with high input precision Technical Field The utility model relates to the technical field of speed reducers, in particular to an RV speed reduction structure with high input precision. Background When RV speed reducer among the prior art is in use, the input shaft of RV speed reducer is direct with motor installation connection, when the motor volume is great, the quality is heavier, RV speed reducer input shaft is longer, can lead to the input shaft to keep away from the one end perk of motor to lead to the input shaft to install the one end of input gear and the tooth difficulty between the planet wheel, not only be convenient for the installation, damage the tooth of input gear moreover easily. In addition, can exist when input shaft and motor installation are connected and beat, all can exist axiality and straightness error that hangs down between motor and the body, between input shaft and the motor, between body and the RV speed reducer, multistage accumulated error is big, and then can lead to planet wheel and input gear's meshing error big, and the during operation can appear that the noise is big, the transmission is unstable, abnormal sound, problem such as vibration, life and working accuracy all can be influenced. Disclosure of utility model The utility model aims to provide a RV speed reducing structure with high input precision, which can improve the stability and coaxiality of installation connection of an input shaft and a motor, is convenient for rapid installation of the input shaft and the motor, improves positioning precision and input precision, and prolongs the service life of the motor. The technical aim of the utility model is realized by the following technical scheme: A RV speed reducing structure with high input precision comprises a pin gear shell, an output shaft, an output end cover, two cycloid gears, at least two eccentric shafts arranged in a circumferential array and an input shaft, wherein the two cycloid gears are arranged on two cams of the eccentric shafts and meshed with the pin gear shell through rolling needles, one end, close to the output end cover, of the input shaft is provided with an input gear, the end part of the eccentric shaft is provided with a planet wheel meshed with the input gear, one end, far away from the input gear, of the input shaft is connected with a connecting shaft coaxially arranged with the input gear, a motor is arranged on the connecting shaft through a screw, a supporting bearing is respectively arranged between the outer wall of the input shaft and the inner holes of the output end cover, or two supporting bearings are respectively arranged between the outer wall of the input shaft and the inner holes of the output end cover, and a first deviation correcting structure or a second deviation correcting structure is arranged between the connecting shaft and the input shaft. Through adopting above-mentioned technical scheme, set up a supporting bearing respectively between input shaft and output end cover, perhaps set up two supporting bearings between input shaft and output shaft cover, and set up first structure or the second structure of rectifying between the connecting axle of installation motor and input shaft, utilize supporting bearing to support the input shaft, avoid the input shaft perk, utilize first structure or the second structure of rectifying to rectify, improve the axiality of input shaft and motor, and need not to fix a position between motor and the RV reduction gear, also need not to process the location tang, as long as with the motor shaft cartridge to the connecting axle on with the connecting axle hole terminal surface location can, be convenient for realize quick installation and axiality is higher of motor and RV reduction gear, the overall installation position degree is good, the meshing tooth clearance is little between input gear and the planet wheel, effectively improve positioning accuracy and transmission accuracy, noise, the problem such as vibration, noise and abnormal sound are improved, the stability of transmission and life. The first deviation correcting structure comprises a spline shaft which is coaxially arranged with the input shaft, wherein an inner hole of the spline shaft is meshed with the outer wall of the input shaft through spline teeth, the spline shaft is detachably arranged at one end, close to the input shaft, of the connecting shaft through screws, a mounting ring which is coaxial with the spline shaft is arranged between the spline shaft and the connecting shaft, a first positioning membrane ring which is coaxial with the mounting ring is arranged between the mounting ring and the end part of the connecting shaft, and a second positioning membrane ring which is coaxial with the mounting ring is arranged between the mounting ring and the spline shaft. Through adopting above-mentioned technical scheme, first positioning membrane ring and second positioning m