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Constant speed universal joint

A technology of constant velocity universal joints and outer joints, which is applied to gear transmission mechanisms, furnace types, couplings, etc., can solve the problems of reduced life of punches, easy damage of punches, and increased number of processes to achieve increased strength , the effect of inhibiting quenching cracking and inhibiting deformation

Inactive Publication Date: 2010-09-15
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this countermeasure, it is necessary to increase the number of steps to manufacture a punch with a special shape, so the cost of punch manufacturing increases
Moreover, there is a large resistance when the punch is pulled out from the inside of the cup-shaped portion 22 of the outer joint member 21 after forging, so the punch is easily damaged and the life of the punch is reduced.

Method used

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  • Constant speed universal joint
  • Constant speed universal joint
  • Constant speed universal joint

Examples

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Embodiment Construction

[0054] Hereinafter, the best mode for carrying out the present invention will be described.

[0055] figure 1 An undercut-free constant velocity universal joint (hereinafter referred to as UJ) according to an embodiment of the present invention is illustrated. This UJ includes an outer joint member 1 , an inner joint member 2 , a ball 3 , and a cage 4 as main components. The outer joint member 1 is composed of a cup-shaped portion 1a with one opening and a rod portion 1b. The cup-shaped portion 1a has a track groove 1d formed on the inner peripheral surface 1c, a tapered escape surface 1f that is continuous from the inner peripheral surface 1c to the opening end surface 1e, and a hole for attaching the protective cover 5 formed on the outer peripheral surface 1g. Circumferentially extending boot groove 1h.

[0056] The inner joint member 2 is positioned inside the cup-shaped portion 1a of the outer joint member 1, and has a spherical outer peripheral surface 2a. A track g...

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Abstract

A constant velocity universal joint that has high strength and in which deformation by quenching of an opening end of a track groove of an outer joint member is suppressed. The constant velocity universal joint is of undercut free type in which the track groove (1d) at a cup section (1a) of the outer joint member has a hardened layer (8a) formed by induction hardening. An opening end surface (1e) is protruded by an amount t in the axial direction from a groove bottom (c) of the track groove (1d) in a recessed surface (1f). The protrusion amount t is in the range of 0.037d to 0.185d, where d is the diameter of torque transmission balls. The opening end surface (1e) at a protrusion (1i) and an outer peripheral surface (1j), continuing to the opening end surface (1e), of the cup section (1a) have non-hardened layer not hardened by quenching.

Description

technical field [0001] The present invention relates to an undercut-free constant velocity universal joint used, for example, in a drive shaft for a front wheel of an automobile. Background technique [0002] In the power transmission system of automobiles or various industrial machines, constant velocity universal joints connect the rotating shaft on the drive side and the rotating shaft on the driven side to transmit torque at constant angular velocities. There are fixed type and sliding type. While the fixed type allows only angular displacement, the sliding type is a type that allows both angular displacement and axial displacement. [0003] The fixed constant velocity universal joint used on the wheel side of the drive shaft for the front wheels of an automobile is linked to the operation of the steering wheel and allows a high operating angle due to the left and right movement of the wheels. Therefore, the constant velocity universal joint requires a static strength t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D3/223C21D1/10C21D1/18C21D9/40C22C38/00C22C38/04F16D3/20F16D3/2237
CPCC21D2221/00C22C38/00F16D2300/10F16D3/224C21D9/40F16D3/2237C21D7/04C21D1/10F16D2250/0053Y10S464/906Y02P10/25
Inventor 大场浩量吉田和彦曾根启助
Owner NTN CORP
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