JPS6142980Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is mainly used in front-wheel drive vehicles, and is a sliding type that is interposed between the drive shaft on the side of the transmission linked to the engine and the driven shaft connected to the outer front wheels. Regarding constant velocity universal joints.

Conventionally, as shown in the first diagram, an outer member a at the end of one shaft and an inner member b at the end of the other shaft are connected by three guide grooves c in the axial direction and a radius A type is known in which three spherical rollers e that slide on three leg pieces d in the direction are engaged with each other, but in this case, as shown in the same figure, the three guide grooves c Generally, the outer member a side and the three leg pieces e are arranged on the inner member b side. Considering the case where one of the shafts is easily eccentric and a correspondingly large run-out occurs, that is, when both shafts are bent by an angle Θ, the distance from the axis of the guide groove c is set to R.
Then, the amount of eccentricity E is expressed as E=R(1/cosΘ-1). Therefore, in order to reduce this amount of eccentricity E, it is necessary to decrease R, but in order to do so, the outer member a be made smaller in diameter, and the inner member b should be made smaller in diameter accordingly,
This reduction in diameter has a certain limit due to the power transmission capacity, and thus the eccentricity E is relatively large, which is accompanied by the disadvantage that it is difficult to avoid noise, vibration, etc. due to whirling.

In order to improve this inconvenience, three guide grooves c.
In this case, the inner member b is provided, and the three leg pieces d are provided on the outer member a, and the distance from the axis of the guide groove c is set from the radius of the inner member b while keeping the inner member b relatively large in diameter. Although it is known that the size is made smaller, this method has disadvantages such as the attachment strength of the leg piece d of the outer member a tends to be insufficient.

The purpose of the present invention is to obtain a joint free of such inconveniences, and the outer member 4 at the end of one shaft 2 and the inner member 5 at the end of the other shaft 3 are connected to each other. Three leg pieces 7 protruding from the inner circumference of...
In the slide type constant velocity universal joint in which three spherical rollers 8 supported by ... and three guide grooves 6 in the axial direction provided on the outer periphery of the inner member 5 are engaged with each other, A raised strip 9 for attaching the leg piece 7 is formed in the inner circumferential axis direction of the outer member 4, and a wide groove wider than the raised strip 9 is formed in the guide groove 6 of the inner member 5. It is characterized by being formed.

An example of implementing the present invention will be explained with reference to attached drawings. Figures 2 to 4 show one example of this. 1 is a transmission driven by an engine in a car, 2 is a drive shaft protruding from the side, and 3 is a driven shaft connected to the outer wheels. A cylindrical outer member 4 is fixed to the outer end of the drive shaft 2, and an inner member 5 is fixed inside the driven shaft 3. Both members 4 and 5 have three axial guide grooves 6 formed on one side and three spherical rollers 8 at the tips of three radial leg pieces 7 projecting from the other side. According to the present invention, the guide groove 6
is formed on the inner member 5 side, and the leg piece 7
is provided on the outer member 4 side to protrude inward.
Thus, the aforementioned R, ie, the distance from the axis of the guide groove 6, is smaller than the radius of the inner member 5 while keeping it relatively large in diameter, and the eccentricity E is accordingly reduced. Figure 4 shows the case where both shafts 2 and 3 are bent mutually, and the eccentricity E of shaft 3 is expressed as E=R (1/cosΘ-1) as in the conventional case, and R is relatively Since it is small, E is correspondingly small, and the resulting runout is reduced accordingly.

In this way, according to the present invention, the spherical roller 8
The outer member 4 has leg pieces 7 protruding from the inner periphery to support the outer member 4.
Since the raised strip 9 for attaching the leg piece 7 to the outer member 4 is formed in the inner peripheral axis direction, the leg piece 7 is firmly attached to the outer member 4, and the diameter of the outer member is reduced by attaching the leg piece to the outer member. The leg piece 7 can be easily attached to the outer member 4 without causing any obstruction,
In addition, since the guide groove 6 of the inner member 5 is formed into a wide groove wider than the raised strip 9, even if the inner member 5 is inclined, the tip of the guide groove 6 is loosely fitted into the raised strip 9 and the slope is corrected. It has the effect that the surface can be freely tilted without being blocked by the raised strips 9.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional example, Fig. 2 is a partially cutaway side view of an example of the joint of the present invention, Fig. 3 is a cross-sectional view taken along the - line, and Fig. 4 shows its bent state. It is a side view with a part cut away. 2... One shaft, 3... Other shaft, 4... Outer member, 5... Inner member, 6... Guide groove, 7...
...Leg piece, 8...Spherical roller.

Claims (1)

[Scope of utility model registration request] Outer member 4 at the end of one shaft 2 and the other shaft 3
The inner member 5 at the end of the outer member 4 is supported by three leg pieces 7 protruding from the inner periphery of the outer member 4.
The inner periphery of the outer member 4 in a sliding constant velocity universal joint in which three spherical rollers 8 and three axial guide grooves 6 provided on the outer periphery of the inner member 5 are engaged with each other. A raised strip 9 for attaching the leg piece 7 is formed in the axial direction, and the guide groove 6 of the inner member 5 is formed to be a wide groove wider than the raised strip 9. Slide type constant velocity universal joint.