JP2560556Y2 - Constant velocity joint - Google Patents

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant velocity joint, and more particularly to a constant velocity joint used for connecting a first shaft and a second shaft such as a propeller shaft for a vehicle.

2. Description of the Related Art Conventionally, as such a constant velocity joint,
For example, those disclosed in Japanese Utility Model Publication No. 1-148126 or Japanese Utility Model Publication No. 1-135231 are known. In each of these, a plurality of steel balls held by a ball cage are engaged and arranged in race grooves formed respectively in the inner race and the outer race, and a grease cover is provided on both sides of the outer race, and the drive The torque is transmitted without changing the rotation speed from the shaft side to the driven shaft side.

However, in such a conventional constant velocity joint used in a drive transmission system for a vehicle, the propeller shaft is connected to the second shaft via the constant velocity joint. In this case, the outer race of the constant velocity joint and the companion flange of the second shaft are connected by a plurality of fastening bolts arranged in the circumferential direction. Therefore, although the vibration in the front-rear direction due to the rotation is absorbed to some extent by the spline connection of the propeller shaft, it is not provided as a special torsional absorption mechanism.
There is a problem that torsional vibration caused by torsional resonance such as generation of torsional vibration noise and muffled sound at a medium speed cannot be reduced.
SUMMARY OF THE INVENTION An object of the present invention is to provide a constant velocity joint capable of solving such a conventional problem and suppressing the occurrence of noise by absorbing torsional vibration and preventing resonance.

According to the present invention, an inner race connected to a first shaft and an outer race connected to a second shaft are provided.
In a constant velocity joint having a torque transmitting member engaged with the race groove of the inner race and the race groove of the outer race, a concave portion formed in at least one of the race groove of the inner race and the race groove of the outer race. When the rotational power is transmitted through the torque transmitting member disposed between the torque transmitting member and the vibration absorbing member in the concave portion, the vibration absorbing member is brought into contact with the peripheral portion of the concave portion, and A contact member having a shoulder for regulating the amount of bending.

According to the present invention, the vibration absorbing member is provided in the concave portion formed in at least one of the race groove of the inner race and the race groove of the outer race, so that the propeller shafts connected to each other via the constant velocity joint are provided. The torsional vibration of the high-frequency system generated between the connecting shaft ends is absorbed by the vibration absorbing member. Further, when the rotational power is transmitted via the torque transmitting member, the amount of bending of the vibration absorbing member is restricted by the shoulder of the contact member, so that the total compression of the vibration absorbing member is prevented, and the elastic force is reduced. The deterioration of the vibration absorbing member due to the above is prevented.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. 1A and 1B show an embodiment of the present invention. Here, 1 is a constant velocity joint according to the present invention, 2 is the outer race, 3 is the inner race,
Reference numeral 4 denotes a ball cage, and 5 denotes a ball as a torque transmitting member. The ball 5 is inserted into a plurality of race grooves 6 and 7 provided in the outer race 2 and the inner race 3, respectively.
Are rotatably held. In this example, a spline 3A is formed on the inner peripheral surface of the inner race 3, and the first propeller shaft is spline-coupled to the spline 3A as described later. Reference numeral 8 denotes a bolt hole for connecting a flange in the axial direction, which is formed at a position equally spaced around the outer race 2.
Further, in the present embodiment, two stepped grooves 9 are formed in the race groove 6 of the outer race 2 along the direction of the groove. Both stepped recesses 9, 9 are constant velocity joints 1.
Are provided at positions symmetrical with respect to a line connecting the center of the ball 5 and the center of the ball 5. A vibration absorbing member 10 made of an elastic material such as rubber is provided by vulcanization bonding or the like at the back of the stepped concave streak 9, and a steel contact member bonded to the vibration absorbing member 10 is provided on the surface. 11 are provided. The vibration absorbing member 10 and the contact member 11 constitute a vibration isolating member. As is clear from the enlarged views of FIGS. 1B and 3A and 3B, both shoulders 11A of the contact member 11 are provided.
Is capable of contacting the step 9A of the stepped concave streak 9, and the dimensional relationship is set so that the surface of the contact member 11 and the surface of the race groove 6 are flush with each other when they contact each other. . FIG. 2 shows a state in which the first shaft and the second shaft are connected using the above constant velocity joint 1. That is, reference numeral 21 denotes a first shaft having a shaft end spline-coupled to the inner race 3 of the constant velocity joint 1, reference numeral 22 denotes a companion flange of the second shaft, reference numeral 23 denotes a boot on the first shaft 21 side, reference numeral 2 denotes a boot.
Reference numeral 4 denotes a sealing member that elastically seals between the boot 23 and the first shaft 21, and reference numeral 25 denotes a grease cover provided on the second shaft side. In connecting such a propeller shaft, first, a boot 23 and an elastic sealing member 24 are provided on the outer race 2 on the first shaft 21 side of the constant velocity joint 1, and a grease cover 25 is provided on the second shaft side of the outer race 2. Are press-fitted respectively. In addition, a bolt 27 is inserted into each bolt hole 8 of the outer race 2 and screwed into the screw hole 22A of the companion flange 22. In the present embodiment having the above-described configuration, the rotational force input from the first shaft 21 is transmitted from the inner race 3 of the constant velocity joint 1 to the ball 5 and the outer race 2.
Is transmitted to the companion flange 22 via the Therefore, the contact member 11 is pressed against the ball 5 by the elastic force of the vibration absorbing member 10 against the high frequency torsional vibration which tends to occur at this time, and is absorbed by the vibration absorbing member 10. After the vibration absorbing member 10 has been bent by the predetermined amount δ, the surface of the contact member 11 and the surface of the race groove 6 are flush with each other, and normal torque transmission is performed. As a result,
The looseness of the ball 5 of the constant velocity joint 1 is absorbed, and the entire compression of the vibration absorbing member 10 is prevented. Preventing the entire compression prevents deterioration of the vibration absorbing member 10 due to settling. The material, dimensions and the like of the vibration absorbing member 10 may be set such that an optimal torsional spring constant is obtained, assuming torsional vibration that is likely to occur. FIG. 4 shows another embodiment of the present invention. In the present embodiment, the pressing member that has been in contact with the ball 5 in a part of the race
Are arranged almost entirely. In this case, manufacturing can be facilitated and cost can be reduced. Since other configurations and operations are the same as those of the above-described embodiments, the reference numerals of the corresponding parts are denoted by ', and redundant description is omitted. In the above-described embodiment, only the example in which the press-contact member is disposed in the race groove 6 of the outer race 2 has been described. Needless to say, this may be done.

As described above, according to the present invention, since the vibration absorbing member is provided in at least one of the race groove of the inner race and the race groove of the outer race, the constant velocity joint is provided. The torsional vibration of the high-frequency system generated between the connecting shaft ends of the propeller shafts connected to each other via the vibration absorber can be absorbed by the vibration absorbing member. It can be reduced with a simple configuration without increasing. In addition, when the rotational power is transmitted via the torque transmitting member, the amount of bending of the vibration absorbing member is regulated by the shoulder of the contact member, so that the entire compression of the vibration absorbing member is prevented, and the elastic force is reduced. The deterioration of the vibration absorbing member can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention and FIG.
It is a block diagram shown as a part enlarged view (B).

FIG. 2 is a sectional view showing a configuration of a connecting portion of a propeller shaft to which the present invention is applied.

FIG. 3 is an enlarged view of a main part showing an operation of the embodiment of the present invention.

FIG. 4 is a front view of a main part showing a configuration of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Constant velocity joint 2 Outer race 3 Inner race 5 Ball 6,7 Race groove 10 Vibration absorbing member 11 Contact member

Claims (1)

(57) [Scope of request for utility model registration] An inner race connected to a first shaft, an outer race connected to a second shaft, and a torque transmitting member engaged with a race groove of the inner race and a race groove of the outer race. And a race groove of the inner race and the outer race.
Recess formed in at least one of the race grooves
A vibration absorbing member provided, the torque transmitting member, and the vibration absorbing portion in the concave portion.
Rotating force transmitted through the torque transmitting member
When the vibration is reached, the vibration
A contact member having a shoulder for regulating the amount of deflection of the dynamic absorbing member;
Constant velocity joint characterized by comprising a.