JP2928662B2 - Outer ring for anti-vibration constant velocity joint and anti-vibration constant velocity joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer race for an anti-vibration type constant velocity joint and an anti-vibration type constant velocity joint .

[0002]

2. Description of the Related Art As shown in FIGS. 5 (a) and 5 (b), an outer ring of an anti-vibration type constant velocity joint used for reducing noise and vibration of a drive system of a vehicle has an outer cylindrical portion 32 formed on an outer side. Cylinder 33
And the inner outer cylinder 34, and both outer cylinders 3
An anti-vibration material 35 such as rubber is interposed between 3 and 34.

Conventionally, such an outer ring 31 for joints is used.
In order to prevent abrasion at the time of assembling the vibration isolator, the vibration isolator 35 is vulcanized and bonded between the inner outer cylinder 34 and the steel plate 36, and the steel plate 3
It is manufactured by press-fitting six parts into the outer cylinder 33. Also, an interference ridge 37 is provided on the outer outer cylinder 33 over the entire length in the axial direction.
The ridge 37 and the side surface of the fitting groove 38 of the inner outer cylinder 34 come into contact with each other to transmit torque, thereby preventing the vibration isolator from being damaged.

However, as described above, the interference ridges 3
In the structure in which 7 is provided over the entire length of the outer cylinder, the diameter of the outer ring is inevitably increased in order to increase the weight of the outer ring and to avoid interference between the ridge 37 and the tripod member moving inside the ridge 37. , there is a problem size is large ing.

When vulcanizing and bonding the vibration isolating material, the vibration isolating material 35 is directly bonded to the surfaces of the inner and outer cylinders 33 and 34 because the interference ridge 37 interferes with the bonding die. Therefore, the inner outer cylinder 34, the vibration isolator 35, the steel plate 36
For example, a steel plate must be interposed on the outside of the vibration isolating material, for example, by press-fitting the outer ring and press-fitting it into the outer cylinder.

In order to solve the above problems, only one end of the fitting portion between the outer and inner outer cylinders is provided with a projection acting as a stopper for excessive torque and an abutting surface thereof. There is an idea that the interference between the vulcanization bonding mold and the stopper projection is eliminated to reduce the size of the outer ring.

However, in this structure, the torque transmission position by the projection and the abutment surface during the load operation is concentrated at one end of the fitting portion, and the deformation of the vibration damping material is shifted in the length direction. On the other hand, when the rigidity of the vibration isolator is low, one of the outer outer cylinder and the inner outer cylinder may cause a razor motion.

That is, when a vibration isolating type constant velocity joint is applied to a vehicle, the rigidity of the vibration isolating material having a vibration damping effect is reduced in order to maximize the vibration reducing effect according to the difference in the drive transmission system of the vehicle. Although it is necessary to change variously, in the above structure, when the rigidity of the vibration-proof material is reduced, the rigidity of the inner outer cylinder in the radial direction with respect to the outer outer cylinder is reduced, so that a rubbing motion occurs between the outer cylinders. , The durability of the vibration isolator may be impaired. For this reason, the adjustment of the change in the rigidity of the vibration isolator is greatly restricted, and there is a problem that it is difficult to reduce the vibration optimally.

In view of the above, the present invention enables direct bonding between the outer outer cylinder and the inner outer cylinder of the vibration damping material, and reduces the size of the outer ring.
The object of the present invention is to provide an outer ring for a vibration-isolating constant velocity joint and a vibration-isolating constant velocity joint which can reduce the weight and reduce the rigidity of the vibration isolating material and can obtain an optimal vibration isolating effect. I have.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, an outer ring for a vibration-proof constant velocity joint according to the present invention is provided.
The inner end of the outer cylinder inserted into the outer cylinder.
Three fitting grooves extending in the axial direction from the
Outer surface of inner outer cylinder and inner circumference of outer outer cylinder between fitting grooves of
An outer ring for a vibration-proof constant velocity joint with a vibration-proof material between the surfaces
The outer peripheral cylinder has a circumferential discontinuity at both ends of the inner peripheral surface thereof.
Make the interference projections face each other between both ends of the outer cylinder.
Between the projections at both ends from the outer peripheral surface of the outer
Forming an injection port for injecting a vibration isolating material through the surface,
Necessary in the circumferential direction with respect to the above protrusions at both ends of the outer peripheral surface of the outer cylinder
Adopts a configuration that has a projection abutment surface that faces with a gap
doing.

Also, a vibration-isolating type constant velocity join according to the present invention is provided.
The tripod member inside the outer cylinder of the outer ring
And three tripods are provided on the tripod member.
A spherical roller rotatably supported by the leg shaft is formed in the inner outer cylinder
The structure inserted slidably in the formed fitting groove
Has adopted.

[0012]

[Action] In the above structure, the inner barrel fitted to the outer barrel, from the injection hole by injecting an anti-vibration member for bonding both the outer cylinder. In this state, if excessive torque is applied to the outer ring, the projections provided on both ends of both outer cylinders will abut against the abutment surfaces to transmit torque.

In this structure, both outer cylinders can be simultaneously adhered to each other by the vibration damping material, so that the steel plate can be eliminated. In addition, since the projections are provided at both ends of the outer ring, the projections and the inner cylinder can be bonded together. Since there is no interference with the outer member, the limitation on the inner diameter dimension due to the interference is reduced, and the outer ring diameter dimension can be reduced.

Further, since the torque transmission at the time of load operation is performed at both ends of the outer cylinders, the deformation of the vibration isolator does not shift in the length direction, and the slewing motion is prevented only between the outer cylinders.

[0015]

1 to 3 show an embodiment of the present invention. The outer race A for a joint of this example is a flange type of a tripod type constant velocity joint, and has an outer cylinder portion 1 and
And a flange 2 formed integrally with the outer diameter end of the outer cylindrical portion.

The outer cylinder 1 has an outer cylinder 3 open at both ends.
And an inner outer cylinder 4 fitted on the inner side thereof.

The inner peripheral surface of the outer outer cylinder 3 is formed by a cylindrical surface constituting the groove bottom 6 of the track groove 5, and is provided at both ends of the inner peripheral surface at equal intervals in the circumferential direction. The three interference projections 7 and 8 are opposed to each other between both ends of the outer cylinder 3.
Cormorant is formed. The projections 7 and 8 constitute a torque stopper mechanism between the abutting surfaces 15 and 16 of the inner outer cylinder 4 described later, and the outer and outer projections 7 and 8 are provided so as not to interfere with the movement of the tripod member 9 housed therein. It is formed only near the opening of the cylinder 3.

Further, between the projections 7 and 8 at both ends , an outer side is provided.
Injection hole 1 for anti-vibration material penetrating from the outer peripheral surface to the inner peripheral surface of outer cylinder 3
0 is formed.

On the other hand, the inner outer cylinder 4 has a shaft from its open end.
The three fitting grooves 11 extending in the direction are formed at equal intervals in the circumferential direction . An arc-shaped track groove wall surface 12 is formed on both side surfaces of each fitting groove 11, and together with the groove bottom 6, constitutes the track groove 5.

Further, at both end portions of the outer circumferential surface of the inner barrel 4,
Ribs 13 and 14 are formed corresponding to the interference projections 7 and 8 described above, and the projections 7 and 8 are provided on side surfaces of the ribs 13 and 14.
Abutment surfaces 15 facing each other with a predetermined gap in the circumferential direction,
16 are formed.

The antivibration Thus the outer barrel 3 and the inner sheath 4 to be formed is made of an elastic material such as rubber from the injection hole 10 during the after, both fixed to the mold by fitting together The material 17 is injected and bonded simultaneously. As described above, the method of injecting radially from the outside of the outer cylinder 3 is easy in operation, has less interference with the molds holding both outer cylinders, and can simplify the molds. The workability can be improved and the manufacturing cost can be reduced as compared with the case where the vibration damping material obtained by vulcanizing and bonding is pressed into the outer casing.

A tripod member inserted into the inner outer cylinder 4
9 has three leg shafts 18, and each leg shaft 18 is rotatably supported.
The held spherical roller 19 is fitted to the inner outer cylinder 4.
It is slidably inserted into the groove 11.

The constant velocity joint having the above-described configuration
Engagement of track groove wall surface 12 of mating groove 11 and spherical roller 19
Torque between the outer race A and the tripod member 9
Is transmitted. If an excessive torque acts on the transmission of the torque , the projections 7 and 8 and the abutment surfaces 15 and 16 abut against each other, thereby limiting a certain amount or more of relative displacement of the vibration isolator 17 to prevent a breakage accident.

In this case, since torque transmission is performed at both ends of the outer outer cylinder 3 and the inner outer cylinder 4, the vibration isolator 17 is not deformed in the longitudinal direction, and only the inner outer cylinder 4 is rubbed. Exercise is prevented. Therefore, the rigidity of the vibration isolator can be freely changed without impairing the durability of the vibration isolator 17, and
It is possible to design a vehicle capable of maximizing the vibration reduction effect for various vehicles having different drive transmission systems.

Further, since there is no stopper mechanism in the track groove where the tripod member 9 moves, the restriction on the inner diameter due to interference between the two can be eliminated, and the diameter of the outer ring can be reduced by a normal non-vibration-proof type. It can be reduced to the same level as the outer ring of the constant velocity joint.

FIG. 4 shows another embodiment. In this embodiment, a shaft portion 22 having a serration 23 is integrally provided on an outer cylinder portion 21 of a joint outer race A. The outer cylinder 21
Is similar to that of the above-described embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted.

[0027]

As described above, according to the present invention, since torque transmission during load motion is received at both ends of the outer and inner outer cylinders, uneven deformation of the vibration damping material can be prevented, and only the outer cylinder has The rubbing motion can be eliminated. For this reason, the rigidity of the vibration-proof material can be freely selected, and there is an effect that the optimum design of the vibration-proof joint and the range of application can be expanded for various vehicles.

Further, the outer outer cylinder and the inner outer cylinder are simultaneously bonded by injection of the vibration-proof material from the injection hole,
Since the interference between the two members and the torque stopper mechanism has been eliminated,
There is an advantage that the diameter of the outer ring can be reduced, and the joint can be reduced in size and weight.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a partially longitudinal front view showing another embodiment.

5A is a longitudinal sectional front view showing a conventional example, and FIG. 5B is a side view of a.

[Description of Signs] A Outer ring 1, 21 Outer tube part 3 Outer tube 4 Inner tube 5 Track groove 7, 8 Projection 9 Tripod member 10 Injection hole 15, 16 Abutment surface 17 Anti-vibration material 18 Leg axis 19 Spherical roller

Claims (2)

(57) [Claims] 1. An inner outer cylinder inserted into an outer outer cylinder is formed with three fitting grooves extending in an axial direction from an opening end thereof at equal intervals, and an outer periphery of the inner outer cylinder between the fitting grooves. In the outer ring for a vibration-isolating type constant velocity joint in which a vibration isolating material is provided between the outer surface and the inner peripheral surface of the outer outer cylinder, circumferentially discontinuous interference projections are provided at both ends of the inner peripheral surface of the outer outer cylinder. Provided so as to oppose each other between both ends of the outer cylinder, between the protrusions of both ends to form an injection port for vibration-proof material injection penetrating from the outer peripheral surface of the outer outer cylinder to the inner peripheral surface,
An outer ring for an anti-vibration type constant velocity joint, wherein a projection abutment surface is provided at both ends of an outer peripheral surface of the inner outer cylinder with a required clearance in a circumferential direction with respect to the projection. 2. A tripod member is inserted into the inner outer cylinder of the outer ring for a vibration-isolating type constant velocity joint according to claim 1, and the tripod member is provided with three leg shafts, and each leg shaft is rotatable. An anti-vibration constant velocity joint in which a supported spherical roller is slidably inserted into the fitting groove formed in the inner outer cylinder.