JPH0519667U - Constant velocity joint boot device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the boot from rotating and to reduce the amount of grease scattering in the joint part by making the boot a small diameter. In a constant velocity joint in which one joint portion 6 and the other joint portion 6 are connected by a shaft 7, the tubular body 9 of the one joint portion 6 is replaced by the one tubular portion 13
The tubular body 9 of the other joint portion 6 is placed in the other tubular portion 14, and the hollow shaft 15 is rotatably fitted and supported by the bearing 16 on the outer peripheral surface of the shaft 7. The one side boot 18 is attached to one end of the hollow shaft 15 and the one tubular body 9, and the other boot 19 is attached to the other end of the hollow shaft 15 and the other tubular body 9. And the shaft 7 rotates with respect to the hollow shaft 15 so that the boots 18, 1
The diameter of 9 can be made small without rotating.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a boot device for preventing foreign matter such as earth and sand from entering a joint portion of a constant velocity joint such as a constant velocity joint of an independent suspension suspension of an automobile.

[0002]

[Prior Art]

 As shown in FIG. 1, an independent suspension type suspension of an automobile supports arms 2 swingably up and down on both sides of a support frame 1, and mounts a suspension 3 between each arm 2 and the vehicle body side. The wheels 4 supported on the respective arms 2 and the output side of the differential 5 are connected by a constant velocity joint 8 composed of a joint 6 and a shaft 7, so that the left and right wheels 4 can independently swing up and down. is there. As shown in FIG. 2, the joint portion 6 supports a spherical bearing 10 on the inner peripheral surface of a cylindrical body 9 so as to rotate integrally with the ball 11 through the ball 11. Since both ends are connected to form the constant velocity joint 8, in order to prevent foreign matter such as earth and sand from entering between the cylindrical body 9 and the spherical bearing 10, and to prevent grease from scattering. A boot 12 is attached to the cylinder body 9 and the shaft 7.

[0003]

[Problems to be solved by the device]

 With such a structure, since the shaft 7 and the tubular body 9 rotate integrally, the boot 12 also rotates, and when the shaft 7 rotates at a high speed, the boot 12 is expanded and deformed by the centrifugal force by the centrifugal force, and the boot 12 is quickly deformed. It will be damaged. To solve this, as shown in FIG. 3, the boot 12 is attached to the arm-side tubular portion 13 and the differential gear-side tubular portion 14 so that the boot 12 does not rotate together with the shaft 7. This is good, but the diameter of the boot 12 becomes larger than the diameter of the shaft 7 in order to secure a gap between the shaft 7 and the boot 12, so that the amount of grease scattering in the joint portion 6 increases. Resulting in.

Therefore, an object of the present invention is to provide a boot device for a constant velocity joint capable of solving the above-mentioned problems.

[0005]

[Means for Solving the Problems]

 In a constant velocity joint in which one joint portion 6 and the other joint portion 6 are connected by a shaft 7, the tubular body 9 of the one joint portion 6 is arranged in the one tubular portion 13, and the other joint portion The tubular body 9 of the portion 6 is disposed in the other tubular portion 14, and the hollow shaft 15 is rotatably fitted and supported on the outer peripheral surface of the shaft 7 by the bearing 16. One end of the hollow shaft 15 Constant velocity joint in which the one-side boot 18 is attached across the other portion and the one tubular body 9, and the other boot 19 is attached between the other end of the hollow shaft 15 and the other tubular body 9. Boot device.

[0006]

[Work]

 Since the boots 18, 19 on one side and the other side do not rotate, even if the shaft 7 is rotated at a high speed, the boots do not expand and deform so that the boots 18, 19 on the other side are tubular. Since it is mounted over the parts 13 and 14 and the hollow shaft 15 and does not interfere with the shaft 7, the boots 18 and 19 on the one side and the other side can be made small in diameter, and the amount of grease scattering in the joint part 6 can be reduced. 6. The boot of the shaft 7 and the hollow shaft 15 are covered so that the rotating part is not exposed to the outside.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to FIG. The same parts as in the conventional case have the same reference numerals. A hollow shaft 15 is rotatably fitted and supported at an axially intermediate portion of the shaft 7 via a bearing 16, and the hollow shaft 15 is positioned on the vehicle body side by a positioning bracket 17 to prevent whirling and prevent axial movement. The movement is restricted, and the one-sided boot 18 is mounted over one end of the tubular portion 13 on the arm side and the hollow shaft 15, and the other is provided on the other end of the tubular portion 14 on the differential gear side and the hollow shaft 15. The side boots 19 are attached, and the seals 20 are attached between the inner peripheral surfaces of the tubular portions 13 and 14 and the outer peripheral surface of the tubular body 9 of the joint portion 6, respectively.

[0008]

[Effect of the device]

 Since the boots 18, 19 on one side and the other side do not rotate, even if the shaft 7 is rotated at a high speed, the boots do not expand and deform so that the boots 18, 19 on the other side are tubular. Since it is mounted over the parts 13 and 14 and the hollow shaft 15 and does not interfere with the shaft 7, the boots 18 and 19 on the one side and the other side can be made small in diameter, and the amount of grease scattering in the joint part 6 can be reduced. 6. The boot of the shaft 7 and the hollow shaft 15 are covered so that the rotating part is not exposed to the outside.

[Brief description of drawings]

FIG. 1 is a perspective view of an independent suspension type suspension.

FIG. 2 is a cross-sectional view of a conventional boot device.

FIG. 3 is a cross-sectional view of a conventional improved boot device.

FIG. 4 is a sectional view of a boot device showing an embodiment of the present invention.

[Explanation of symbols]

6 joint part, 7 shaft, 8 constant velocity joint, 9 tubular body, 10 spherical bearing, 11 ball, 13
Tubular part, 14 tubular part, 15 hollow shaft, 16 bearing, 18
One side boot, 19 other side boot.

Claims (1)

[Scope of utility model registration request] 1. In a constant velocity joint in which one joint portion 6 and the other joint portion 6 are connected by a shaft 7, the tubular body 9 of the one joint portion 6 is disposed in the one tubular portion 13. The tubular body 9 of the other joint portion 6 is disposed in the other tubular portion 14, and the hollow shaft 15 is rotatably fitted and supported on the outer peripheral surface of the shaft 7 by the bearing 16. One side boot 18 is attached to one end of the hollow shaft 15 and the one tubular body 9, and the other boot 19 is attached to the other end of the hollow shaft 15 and the other tubular body 9. A boot device with a characteristic constant velocity joint.