Tripod uniform-motion universal joint and method for manufacturing same

A technology of constant velocity universal joint and manufacturing method, which is applied in the direction of gear transmission mechanism, coupling, mechanical equipment, etc., can solve the problems of difficulty in forging of three-ball pin type constant velocity universal joint 101, etc., and achieves easy forging and reduced The effect of load and prolonging the service life

Active Publication Date: 2013-12-18
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that forging of the tripod type constant velocity universal joint 101 becomes difficult.

Method used

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  • Tripod uniform-motion universal joint and method for manufacturing same
  • Tripod uniform-motion universal joint and method for manufacturing same
  • Tripod uniform-motion universal joint and method for manufacturing same

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Embodiment Construction

[0047] Hereinafter, regarding embodiments of the present invention, refer to the accompanying drawings ( Figure 1 to Figure 8 )Be explained.

[0048] Figure 5 In the figure, a double-roller type tripod type constant velocity universal joint capable of reducing vibration is shown as an embodiment of the present invention. This tripod type constant velocity universal joint 1 is composed of an outer ring 2 as an outer joint member, a tripod member 3 as an inner joint member having three pins 4 protruding in the radial direction, and a torque transmission element. The roller unit U constitutes the main part.

[0049] The outer ring 2 has a bottomed cylindrical shape having an opening at one end, and three linear track grooves 14 are formed at equal intervals along the circumferential direction on the inner peripheral surface. A tripod member 3 having three pins 4 and a roller unit U are accommodated inside the outer ring 2 . A center hole 10 is formed in the tripod member 3,...

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Abstract

Provided are a tripod-type constant-velocity universal joint which is capable of reducing weight of a journal raw profile to thereby reduce the number of manufacturing steps and in which forging of journals is facilitated, and a method of manufacturing the same. A leading end corner portion (32) of a journal raw profile (54) is held with use of a die (X) and forged. In this case, in a state in which a relief portion (35) is provided on a leading end side of the die (X), a part including an elliptically longitudinal side of the leading end corner portion (32) of the journal raw profile (54) is held with use of the die (X). In the die (X), inner walls of a part at which the leading end corner portion (32) of the journal raw profile (54) is held constitute tapering surfaces (33). By the forging, at the part including the elliptically longitudinal side relatively on a leading end portion side of an outer peripheral surface (30) of each of journals (4), edge portions (21) reducing a lateral sectional area of each of the journals (4) toward a leading end side thereof are formed, and tapered surfaces (20) are formed on the leading end side of the edge portions (21). Centering on each of the journals (4) is performed by causing two points on an elliptically longitudinal side of the edge portions (21) to abut against a centering jig.

Description

technical field [0001] The present invention relates to a tripod type constant velocity universal joint which is one of sliding type constant velocity universal joints used for drive shafts of motor vehicles or various industrial machines to transmit rotational torque, and a manufacturing method thereof. Background technique [0002] The tripod type constant velocity universal joint is one of the sliding constant velocity universal joints, so it is used in places where angular displacement and axial displacement (reversal) are required. For example, a drive shaft that transmits power from an engine to drive wheels is mounted on the engine side of an intermediate shaft (shaft) constituting the drive shaft. In addition, a fixed constant velocity universal joint that allows only angular displacement is installed on the drive wheel side of the shaft. [0003] Known tripod type constant velocity universal joints include a single-roller type in which one roller is provided as a t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D3/20B21J5/02F16D3/205
CPCF16D3/2055F16D2250/00B21K1/762B21J5/025F16D2003/2026F16D2250/0023Y10T29/49826
Inventor 五十公野纯一小中健司
Owner NTN CORP
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