JPH0623779Y2 - Constant velocity universal joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a constant velocity universal joint capable of preventing the generation of vibration and noise during work.

(Prior Art and Problems) A constant velocity universal joint of the type in which a plurality of balls or rollers supported by a spider are rolled in a housing in order to transmit torque at a constant velocity is known.

This kind of constant velocity universal joint is used, for example, in the drive shaft of a vehicle, but the rolling motion between the ball and the housing causes vibration and noise, which causes fatigue and damage to the rolling parts. There is.

(Means for Solving Problems) In order to solve these problems, the present invention constant velocity universal joint is a constant velocity universal joint in which a plurality of rollers supported by a spider roll in a housing. Apply a thick plastic coating on the roller rolling surface of the housing,
This is characterized in that the roller is forcibly press-fitted in the roller accommodation space narrowed and the roller is mounted on the roller rolling surface.

According to the present invention, after a thick plastic coating is applied to the roller rolling surface of the housing which is inevitably subject to a manufacturing error, the housing and the roller are forcibly assembled to perform an operation such as broaching. Let it be done.

(Function) A thick plastic coating is applied to the roller rolling surface of the housing, and plastic deformation occurs due to press fitting of the roller, so that the rolling surface is better fitted and wear and vibration can be prevented. .

Further, the plastic coating is close to an elastic body depending on the type of material, and is naturally in a preloaded state when a function such as broaching is applied. However, under load, the elasticity of one side (load side) causes the preload on the anti-load side to be in a zero preload state or a minute gap, so that the coating does not wear, and even if slippage occurs, the lubrication effect (material with excellent wear resistance) Does not cause wear.

(Embodiment) FIG. 3 shows a sectional view and a side view of a housing 1 of a constant velocity universal joint to which the present invention is applied.

FIG. 1 shows a state in which a plastic coating 2 is applied to the roller rolling surface of the housing 1 of FIG. 3 according to the present invention. The plastic coating is shaded.

FIG. 2 shows a state in which the spider 6 supporting the roller 4 is incorporated in the housing 1.

Nylon or Teflon (registered trademark) is suitable for the plastic film to be applied.

After a thicker plastic coating is applied to the housing 1, the roller 4 is forcibly attached to the housing 1 and the plastic adhered surface is subjected to an action such as broaching to cause plastic deformation. The plastic coating provides a preload between the housing 1 and the roller 4.

With this structure, the conformability between the roller and the housing is improved, and the plastic coating is subjected to a compression action to improve durability.

(Effect of the device) While the dimensional accuracy of the roller can be improved by grinding, the dimensional error of the housing is inevitably caused by cold forging and heat treatment during manufacturing. It is difficult. Therefore, according to the present invention, a thick plastic coating is applied to the rolling surface of the housing, and a roller finished to the final dimension is forcibly installed in the housing space narrowed by the housing to broach the plastic applied surface. In addition to such an effect, the effect that the finishing is automatically performed with respect to the manufacturing error of the rolling surface of the housing is obtained. Further, according to the present invention, since the rolling surface between the roller and the housing is completely fitted, the vibration and noise generated in the conventional product are eliminated, the damage due to wear and fatigue is reduced, and the durability is remarkably improved. There is an increasing effect.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a plastic coating is applied to the housing of the constant velocity universal joint of the present invention, FIG. 2 is a front view showing a state in which a roller is assembled to the housing of FIG. 1, and FIG. (a), (b) is a front view which shows the housing of the conventional constant velocity universal joint. 1 ... Housing 2 ... Plastic coating 4 ... Roller 6 ... Spider

Claims (1)

[Scope of utility model registration request] 1. A constant velocity universal joint for rolling a plurality of rollers supported by a spider in a housing, wherein a roller coating surface of the housing is covered with a thick plastic coating, thereby narrowing the roller housing. A constant velocity universal joint characterized in that the roller is forcibly press-fitted in a space and the roller is mounted on a roller rolling surface.