JPH04114127U - Tripod type constant velocity joint - Google Patents

Abstract

(57) [Summary] [Purpose] In a tripod type constant velocity joint, it is possible to reduce the weight of the outer race 2 by reducing the excess thickness of the outer race 2 without any impediment to the function of the constant velocity joint. Try to reduce the weight of the joint. [Structure] A protruding leg portion 3 provided between groove portions 4 formed inside the outer race 2 and in which the tripod shaft 14 is housed;
A recess 17 provided on the inner peripheral surface facing the inner race 11
Form a missing part consisting of etc.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a tripod type constant velocity joint.

0002

[Conventional technology]

In the conventional tripod type constant velocity joint, as shown in Figures 5 and 6, rotation The outer race 32, which is attached to one of the two shafts that transfers torque, has an inner Grooves 31 are formed in the axial direction at equal angular intervals, and protruding leg parts are formed between these grooves 31. 30 is provided protrudingly.

0003

[Problem that the idea aims to solve]

Recently, there has been a strong demand for improved fuel efficiency in automobiles, and constant velocity joints are required to be lighter. I am struggling with how to respond to this request. In particular, the outer race 32 is a constant velocity joint. Since the weight of the outer lace 32 is large, there is an urgent need to review the shape of the outer lace 32. Ru.

0004

[Means to solve the problem]

This invention was made to solve the above-mentioned problem, and is a method for transmitting rotational torque. The inner race is formed on one of the two shafts, and the torques are arranged radially at equal angular intervals. a tripod shaft; a spherical roller rotatably supported by the tripod shaft; It is provided on the other of the two shafts and is slidably inserted into the inner race in the axial direction. The spherical roller can be rolled inside the outer race. In a tripod type constant velocity joint in which a groove is formed in the axial direction to accommodate the A hollow part is provided in the protruding leg part between the groove parts of the outer race to reduce weight. It is characterized by

[0005]

[Effect]

With the above configuration, the outer It is possible to reduce the excess thickness of the race, making it possible to reduce the weight of the constant velocity joint. Ru.

[0006]

【Example】

Embodiments of the present invention will be described below based on the drawings. In Figures 1 and 2, 1 is the drive A cylindrical outer race 2 is attached to one end of the drive shaft 1 at four locations on the outer circumference. Connected with bolts and nuts. Outer race 2 has an inner circumference extending in the axial direction. A protruding leg portion 3 and a groove portion 4 are mutually formed, and these protruding leg portions 3 and groove portion 4 are It is integrally formed by cold forging when the race 2 is manufactured.

[0007] 10 is a driven shaft, and an inner race 11 is attached to one end of this driven shaft 10. Pline-fitted, one end is in contact with the stepped portion 13, and the open end side is in contact with the circlip 12. This prevents it from coming off in the axial direction. The inner race 11 has equal angles in the radial direction. Tripode shafts 14 are formed at intervals, and each tripod shaft 14 has a needle. A spherical roller 16 is rotatably supported via rollers 15. And when assembling In the groove part 4 of the outer race 2, a spherical roller supported by a tripod shaft 14 is provided. 16 is housed in a rollable manner, and the tripod shaft 14 is arranged in the axial direction with respect to the outer race 2. is slidably supported.

[0008] Further, on the inner circumferential surface of the protruding leg portion 3 of the outer race 2 facing the inner race 11, The recess 17 is formed from the inner circumferential side by cold forging when manufacturing the outer race 2. It is formed as follows. The inner circumferential surface of this protruding leg portion 3 facing the inner race 11 is Originally, there was a certain amount of clearance 18 with the inner race 11, and there was a depression on this surface. Even if the groove 17 is formed, there will be no problem in the function of the constant velocity joint. In this way, the recess 17 is formed on the inner circumferential surface of the protruding leg portion 3 facing the inner race 11. By forming this, the outer The weight of Base 2 can be significantly reduced, contributing greatly to the weight reduction of constant velocity joints. You can donate.

[0009] In addition, as another example, as shown in FIGS. 3 and 4, the protruding legs of the outer lace 2 A similar effect can be obtained even if a plurality of blind holes 19 are provided in the portion 3 in the axial direction from the end surface. You can get results.

0010

[Effect of the idea]

As described above, the present invention provides a structure in which the protruding legs are provided between the grooves of the outer race. The structure has hollow parts such as hollows and holes in the part, so it can be used as a tripod type etc. The weight of the outer race can be reduced without interfering with the function of the speed joint. This makes it possible to reduce the weight of the outer race and reduce the weight of the constant velocity joint. It is possible to aim for

[Brief explanation of drawings]

FIG. 1 is a side view of a constant velocity joint showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is a side view of a constant velocity joint showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view of the outer race taken along line BB in FIG. 3;

FIG. 5 is a side view of an outer lace showing the prior art.

6 is a sectional view taken along line CC in FIG. 5. FIG.

[Explanation of symbols]

1 Drive shaft 2 Outer lace 3 Projecting legs 4 Groove 10 Driven shaft 11 Inner lace 14 Tripod axis 16 Spherical roller 17 Hollow 19 Blind hole

Claims (1)

[Scope of utility model registration request] 1. A tripod shaft formed on an inner race provided on one of two shafts for transmitting rotational torque and provided radially at equal angular intervals; a spherical roller rotatably supported by the tripod shaft; An outer race is provided on the other of the two shafts and is slidably inserted into the inner race in the axial direction, and a groove portion is formed in the inner race in the axial direction to accommodate the spherical roller in a rollable manner. A tripod type constant velocity joint, characterized in that a protruding leg portion between the groove portions of the outer race is provided with a recessed portion for weight reduction.