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Roller pin, reducer and robot

A reducer and needle roller technology, which is applied in the direction of manipulators, shafts, bearings, mechanical equipment, etc., can solve problems such as the inability to store lubricating grease on the end surface of the needle roller, wear and tear of the needle roller, and achieve good heat dissipation and increase the surface area.

Active Publication Date: 2018-11-30
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing RV reducer, the planet carrier and the rigid disk are installed on the pinion housing through bearings. When the RV reducer is working, the end surface in the direction of the extension of the needle is in contact with the bearing in a large area, and there is no way to store lubricating grease on the end surface of the needle roller. , the needle roller is prone to wear

Method used

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  • Roller pin, reducer and robot
  • Roller pin, reducer and robot
  • Roller pin, reducer and robot

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] see figure 1 , figure 1 It is a sectional view of the first embodiment of the needle roller of the present invention. The needle roller provided by the invention is used to form a reducer with a cycloidal reduction structure, such as an RV reducer. The outer contour of the needle roller 1 provided in this embodiment is cylindrical, and the needle roller 1 has opposite first end 191 and second end 192 in the axial direction, and a ring-shaped protrusion 11 is arranged on the outer edge of the end surface of the first end 191. The protrusion 11 protrudes outward along the axial direction of the needle roller 1, the outer surface 110 of the annular protrusion 11 is an arc surface, and the needle roller 1 forms an oil groove 12 recessed relative to the annular protrusion 11 around the annular protrusion 11 , the oil groove 12 has a groove surface 120, and the bottom surface of the groove surface 120 is a plane.

[0044] Correspondingly, a circle of annular protrusions 13...

no. 2 example

[0046] see figure 2 , figure 2 It is a sectional view of the second embodiment of the needle roller of the present invention. The outer contour of the needle roller 2 provided in this embodiment is cylindrical, and the needle roller 2 has opposite first and second ends in the axial direction, and a ring-shaped protrusion 21 is arranged on the outer edge of the end surface of the first end. 21 protrudes outward along the axial direction of the needle roller 1. The outer surface of the annular protrusion 21 is an arc surface. The needle roller 1 forms an oil groove 22 that is recessed relative to the annular protrusion 21 around the annular protrusion 21. The oil groove 22 It has a groove surface 220, which is a concave arc surface. Specifically, the groove surface 220 can be set as a concave spherical crown surface or a hemispherical surface.

[0047] Correspondingly, a ring-shaped protrusion 23 is provided on the outer edge of the end surface of the second end, and the ann...

no. 3 example

[0049] see image 3 , image 3 It is a sectional view of the third embodiment of the needle roller of the present invention. The outer contour of the needle roller 3 provided in this embodiment is cylindrical, and the needle roller 3 has opposite first and second ends in the axial direction, and a ring-shaped protrusion 31 is arranged on the outer edge of the end surface of the first end. The protrusion 31 protrudes outward along the axial direction of the needle roller 1, the end face 310 of the annular protrusion 31 is a plane, and the needle roller 3 forms an oil groove 32 recessed relative to the annular protrusion 31 around the annular protrusion 31, the oil groove 32 is The oil groove 32 has a circular frustum shape, and the groove surface 320 is a circular frustum surface.

[0050]Correspondingly, a ring-shaped protrusion 33 is provided on the outer edge of the end surface of the second end, and the annular protrusion 33 protrudes outward along the axial direction of ...

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PUM

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Abstract

The invention provides a roller pin, a reducer and a robot. An annular protrusion is arranged on the outer edge of the end of the roller pin in the extension direction. The annular protrusion protrudes outwards from the end in the extension direction. An oil groove recessed downwards relative to the annular protrusion is formed in the surrounding position of the annular protrusion of the roller pin. The reducer comprises a cycloidal gear, a pin wheel housing, roller pins, a planet carrier, a rigid disk, a first bearing and a second bearing. The rigid disk is connected to the pin wheel housingthrough the first bearing in a rotating mode. The planet carrier is connected to the pin wheel housing through the second bearing in a rotating mode. The cycloidal gear is arranged between the rigid disk and the planet carrier. The multiple roller pins are arranged between the cycloidal gear and the pin wheel housing. The roller pin bearings are located in bearing holes, and the annular protrusions of the roller pins abut against the first bearing or the second bearing. In the operating process of the reducer, the contact area between the annular protrusions and the bearings is effectively reduced, lubricating grease can be stored in the oil groove, and wet friction can be kept between the annular protrusions and the bearings. The superficial area of each roller pin is increased due to arrangement of the annular protrusions and the corresponding oil grooves, and the heat radiating effect is made better.

Description

technical field [0001] The invention relates to the technical field of deceleration equipment, in particular to a needle roller, a decelerator and a robot with the decelerator. Background technique [0002] In the existing RV reducer, the pin gear housing and the cycloidal wheel are engaged by needle rollers, and the cycloidal wheel rotates eccentrically relative to the internal gear, and the number of teeth of the internal gear is different from that of the cycloidal wheel. In the case of the type with eccentric rotation of the cycloid wheel, the cycloid wheel is supported on the planet carrier and the rigid disc. When the cycloidal wheel meshes with the internal gear and rotates eccentrically, the planet carrier and the rigid disc rotate slowly relative to the internal gear corresponding to the difference in the number of teeth of the two gears. [0003] In the existing RV reducer, the planet carrier and the rigid disk are installed on the pinion housing through bearings....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/04F16C33/66F16C33/34F16H57/021B25J17/02
CPCB25J17/02F16C33/34F16C33/6637F16H57/021F16H57/0412F16H57/0471
Inventor 孙豹胡余生钟成堡崔中程中甫刘成梁光盛
Owner GREE ELECTRIC APPLIANCES INC