JPH0545252U - Constant velocity joint - Google Patents

Abstract

(57) [Summary] [Purpose] The generation of noise is suppressed by absorbing the torsional vibration generated in the connecting portion. [Structure] A vibration-damping member including a vibration absorbing member 10 and a contact member 11 that is in pressure contact with a ball 5 is disposed in a race groove 6 of an outer race 2 provided to fasten a companion flange 22 of a second shaft.

Description

[Detailed description of the device] [Industrial applications]

 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 vehicle propeller shaft.

[Prior Art]

 Conventionally, such constant velocity joints are known, for example, as disclosed in Japanese Utility Model Publication No. 1-148126 or Japanese Utility Model Publication No. 1-135231. Each of these has a plurality of steel balls held by a ball cage engaged in race grooves formed in the inner race and outer race respectively, and grease covers are provided on both sides of the outer race. The torque is transmitted from the drive shaft side to the driven shaft side without changing the rotation speed.

[Problems to be solved by the device]

 However, in any of the conventional constant velocity joints used in the drive transmission system for automobiles, when connecting the propeller shaft to the second shaft via the constant velocity joint, the outer portion of the constant velocity joint is connected. The race and the companion flange of the second shaft are configured to be connected by a plurality of fastening bolts arranged in the circumferential direction. Therefore, although the vibration in the front-back 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 absorption mechanism for torsion, and therefore torsional vibration noise and medium-speed vibration There was a problem that torsional vibration due to torsional resonance such as muffled sound could not be reduced. An object of the present invention is to provide a constant velocity joint that solves the above-mentioned conventional problems and that suppresses the generation of noise by absorbing torsional vibrations and preventing resonance.

[Means for Solving the Problems]

 In order to achieve this object, the present invention relates to an inner race connected to a first shaft, an outer race connected to a second shaft, a race groove of the inner race and a race groove of the outer race. In a constant velocity joint having a torque transmission member that is arranged in parallel, a vibration damping member that is in pressure contact with the torque transmission member is provided in at least one of the race grooves.

[Action]

 According to the present invention, the vibration isolating member is provided which comes into pressure contact with the torque transmitting member which is disposed in engagement with the race groove of the constant velocity joint connecting the first shaft and the second shaft. The member can absorb the torsional vibration in the rotational direction that occurs when the rotational force is transmitted from the first shaft to the second shaft, and the function of suppressing the generation of noise can be obtained.

【Example】

 Hereinafter, embodiments of the present invention will be specifically described 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 its outer race, 3 is an inner race, 4 is a ball cage, and 5 is a ball as a torque transmitting member, which are provided on the outer race 2 and the inner race 3, respectively. The ball 5 is rotatably held in the plurality of race grooves 6 and 7 provided. 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. Numeral 8 is a bolt hole for axially connecting the flange, which is formed in the outer race 2 at equally divided positions. Further, in the present embodiment, the race groove 6 of the outer race 2 is formed with two stepped recesses 9 and 9 along the direction of the groove. The two-step recessed ridges 9, 9 are provided at positions symmetrical with respect to the line connecting the center of the constant velocity joint 1 and the center of the ball 5. Further, a vibration absorbing member 10 made of an elastic material such as rubber is provided by vulcanization adhesion or the like in the inner part of the stepped recessed line 9, and a steel contact bonded to the vibration absorbing member 10 is provided on the surface part. A member 11 is provided. The vibration absorbing member 10 and the contact member 11 constitute a vibration damping member. As is apparent from the enlarged views of FIGS. 1 (B) and 3 (A) (B), both shoulders 11A of the contact member 11 are capable of abutting on the step 9A of the stepped groove 9. 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 abut. FIG. 2 shows a state in which the first shaft and the second shaft are connected using the constant velocity joint 1 described above. That is, 21 is the first shaft having the shaft end spline-coupled to the inner race 3 of the constant velocity joint 1, 22 is the companion flange of the second shaft, 23 is the boot on the side of the first shaft 21, and 24 is the boot 23 and the boot. 1 is a sealing member that elastically seals the shaft 21 and 25 is a grease cover provided on the second shaft side. In connecting such a propeller shaft, first, the boot 23 and the elastic sealing member 24 are provided on the outer race 2 on the first shaft 21 side of the constant velocity joint 1, and the grease cover 25 is provided on the second shaft side of the outer race 2. Are press fitted. Furthermore, bolts 27 are inserted into the bolt holes 8 of the outer race 2 and screwed into the screw holes 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 companion flange 22 via the balls 5 and the outer race 2. However, with respect to the high frequency torsional vibration that tends to occur at this time, the contact member 11 is pressed against the ball 5 by the elastic force of the vibration absorbing member 10 and is absorbed by the vibration absorbing member 10. After the vibration absorbing member 10 bends by a 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 rotational force is transmitted. As a result, the rattling of the balls 5 of the constant velocity joint 1 is absorbed, and the vibration absorbing member 10 is prevented from being fully compressed. By preventing total compression, deterioration of the vibration absorbing member 10 due to fatigue is prevented. The material, dimensions, etc. of the vibration absorbing member 10 may be set so as to obtain an optimum twisting constant, assuming torsional vibration that is likely to occur. FIG. 4 shows another embodiment of the present invention. In this embodiment, the pressure contact member that was in contact with the ball 5 in a part of the race groove 6 in the previous embodiment is arranged in almost the entire race groove 6. By doing so, 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 corresponding parts are attached with ′ and the duplicated description thereof will be omitted. In the above-described embodiment, only the example in which the pressure contact member is arranged in the race groove 6 of the outer race 2 has been described, but this is arranged in the race groove 7 of the inner race 3 or both of them. It goes without saying that you may do so.

As described above, according to the present invention, the constant velocity joint is provided with the anti-vibration member in pressure contact with the torque transmission member in at least one of the race grooves of the constant velocity joint. The high-frequency torsional vibrations that occur between the connecting shaft ends of the propeller shafts that are connected to each other via the vibration absorbers can be absorbed by the vibration-damping member, reducing torsional vibration noises and uncomfortable muffled noises that occur at medium speeds. It is possible to obtain the effect of reducing with a simple configuration without increasing.

[Brief description of drawings]

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

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

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

FIG. 4 is a front view of essential parts showing the configuration of another embodiment of the present invention.

[Explanation 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)

[Scope of utility model registration request] 1. A torque transmission member arranged to engage with an inner race connected to a first shaft, an outer race connected to a second shaft, a race groove of the inner race and a race groove of the outer race. A constant velocity joint having a vibration isolating member, which is in pressure contact with the torque transmitting member, disposed in at least one of the race grooves.