JP2601096Y2 - Boot mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot mounting apparatus for a constant velocity joint for a vehicle.

[0002]

2. Description of the Related Art A large-diameter end of a sealing boot of a constant velocity joint for an automobile is fitted to an outer diameter surface of an outer ring of the constant velocity joint, and a small diameter end is fitted to an outer diameter surface of a shaft. Is done. At each of these fittings, a fastening band is used to fix the boot end. Further, in order to prevent the tightening band from coming off due to a flying stone or the like, a protector has been conventionally fitted on the outer diameter surface (for example, Japanese Utility Model Laid-Open No. 1-49735, Japanese Utility Model Laid-Open No. 2-109012).

[0003] The tightening band 1 used in the boot mounting apparatus as described above has an inner overlapping portion 4 having engaging claws 3 protruding from both ends of a band 2 as shown in FIGS.
An outer overlapping portion 6 provided with an engaging hole 5 at the other end, and a bulging portion 7 for reducing diameter by caulking a part of the band 2 at a portion close to the outer overlapping portion 6. ing.

The above-mentioned tightening band 1 is fitted around an end of a boot 9 fitted on an outer diameter surface of an outer ring 8 of a constant velocity joint as shown in FIG. The tightening band 1 inserts the engaging claw 3 into the engaging hole 5 and engages the same, and reduces the diameter by caulking the rising portion of the bulging portion 7 to tighten the boot 9. In addition, a ring-shaped rubber protector 10 having a certain thickness is fitted on the outer diameter surface of the tightening band 1 to protect the tightening band 1, particularly the bulging portion 7 which is easily hit by a flying stone.

[0005]

As described above, according to the boot mounting apparatus, the protector 10 for protecting the bulging portion 7 has a sufficient thickness, but the other portions have an unnecessarily large thickness. Therefore, the weight reduction of the protector 10 is hindered, and the manufacturing cost is increased.

Therefore, the first invention of this application is to solve the above-mentioned problem by reducing the thickness of the part of the protector other than necessary.

Another object of the present invention, in addition to the above objects, is to prevent the protector from moving in the axial direction with a simple structure.

[0008]

According to the first aspect of the present invention, in order to solve the problem, a tightening band and a protector for covering an outer diameter surface of the tightening band are provided. A boot mounting comprising engaging and bending a part of the tightening band outward to provide a bulging portion for caulking in diameter, and forming an axial groove for accommodating the bulging portion on an inner surface of the protector. In the apparatus, a configuration was adopted in which the outer diameter of the groove portion of the protector was the largest and the outer diameter of the other portions was smaller than that.

Further, in the second invention, in addition to the above configuration, an engaging claw is provided in a lower overlapping portion of both ends of the tightening band, and an engaging hole for passing the engaging claw is provided in the upper overlapping portion. A configuration in which a recess for fitting the protruding end of the engaging claw is provided on the inner diameter surface of the protector is employed.

[0010]

According to the structure of the first invention, the thickness of the portion of the protector covering the portion other than the bulging portion is smaller than the thickness of the portion covering the bulging portion. The portion covered by the bulging portion has a required thickness, so that the bulging portion protecting function is not lost.

Further, according to the configuration of the second invention, according to the first aspect,
In addition to the function of the present invention, the protector is prevented from moving in the axial direction by the engagement between the protruding end of the engaging claw and the recess on the inner surface of the protector.

[0012]

1 to 4 show a boot mounting apparatus 11, 11 'according to a first embodiment. This boot mounting device 11,
11 'is a large-diameter end 13 of the bellows-shaped boot 9 and a small-diameter end 1 between the outer ring 8 and the shaft 12 of the constant velocity joint.
4 is attached. Boot mounting device 1 for both
1 and 11 ′ have the same configuration, so that the large-diameter end 1
The boot mounting device 11 mounted on the device 3 will be described.

The boot mounting device 11 includes the tightening band 1 and the protector 10. The fastening band 1 is the same as the conventional one (see FIGS. 8 and 9).

The protector 10 is formed of an annular rubber or an elastic body similar thereto, and has an axial groove 15 formed on the inner surface of the protector 10 so as to fit the bulging portion 7 of the tightening band 1. The outer diameter of the protector 10 is largest at the portion that covers the bulging portion 7, gradually decreases with distance from the bulging portion 7, and becomes minimum at portions other than the bulging portion 7 and its vicinity. Therefore, the thickness of the protector 10 is sufficiently thick at the bulging portion 7 and the vicinity thereof, but becomes thin at the other portions (the dashed line in FIG. 2 indicates the case of the conventional example in which the outer circumference is formed over the entire circumference. is there).

As shown in FIGS. 3 and 4, the outer end of the groove 15 of the protector 10 is provided with a regulating portion 16 protruding toward the inner diameter side, and the bulging portion 7 accommodated in the groove 15 is provided.
Of the protector 1 against the inner surface of the regulating portion 16.
0 is restricted from moving to the boot 9 side.

The boot mounting device 11 of the first embodiment is as described above. When a stepping stone hits in the direction of arrow A in FIG. 2, the protector 10 is engaged with the bulging portion 7 and the groove 15. Is prevented from rotating in the circumferential direction. In addition, when a stepping stone hits in the direction of arrow B in FIG. 4, it is prevented from moving toward the boot 9 by the restricting portion 16.

A recess for receiving the protruding end of the locking claw 3 is not particularly provided on the inner diameter surface of the protector 10, and the protector 10 receives the protrusion by elastic deformation.

In the second embodiment shown in FIG. 5, an annular restricting portion 16 'is provided around the entire outer end of the protector 10, and the rib 17 on the inner peripheral surface of the restricting portion 16' This is engaged with the groove 18 of the radial surface. According to this, the protection against the flying stones in the direction of arrow B and the movement of the boot 9 are further ensured.

In the third embodiment shown in FIGS. 6 and 7, a circumferential groove-shaped recess 19 for receiving the protruding end of the engaging claw 3 is provided on the inner diameter surface of the protector 10, and the recess 19 is formed in the recess 19. By fitting the protruding end of the engaging claw 3, the protector 1
0 is prevented from moving in the axial direction.

[0020]

As described above, according to the first invention of the present application, the protector function is exhibited because the thickness of the protector portion covering the bulging portion of the tightening band is sufficiently large, while the other portions of the protector function. Since the thickness is small, the weight of the protector can be reduced and the cost can be reduced.

Further, in the second invention, there is no need to provide a restricting portion beyond the width of the tightening band, and even if the protector has the same width as the tightening band, it is possible to restrict the movement in the axial direction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mounted state of a first embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a partially cutaway sectional view of the protector according to the first embodiment.

FIG. 4 is a partially enlarged sectional view of the above.

FIG. 5 is a sectional view of the second embodiment in an attached state.

FIG. 6 is a sectional view of a third embodiment in an attached state.

FIG. 7 is a partially cutaway sectional view of the protector according to the first embodiment;

FIG. 8 is a sectional view of a conventional example in use.

FIG. 9 is a perspective view of the tightening band of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tightening band 2 Banding 3 Engagement claw 4 Inner overlap part 5 Engagement hole 6 Outer overlap part 7 Swelling part 8 Outer ring 9 Boot 10 Protector 11, 11 'Boot mounting device 12 Shaft 13 Large diameter side end 14 Small diameter side End 15 Groove 16, 16 'Regulator 17 Rib 18 Groove 19 Groove recess

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 3/84 F16J 3/04 F16J 15/52

Claims (2)

(57) [Scope of request for utility model registration] 1. A fastening band comprising a tightening band and a protector for covering an outer surface of the tightening band, wherein both ends of the tightening band are detachably engaged, and a part of the tightening band is bent outward to reduce the diameter. In the boot mounting device in which the bulge portion is provided and an axial groove for housing the bulge portion is formed on the inner surface of the protector, the outer diameter of the groove portion of the protector is the largest, A boot mounting device characterized in that the outer diameter of the portion is formed smaller than that. 2. An engaging claw is provided in a lower overlapping portion of both ends of the tightening band, an engaging hole for passing the engaging claw is provided in an upper overlapping portion, and the engaging claw protrudes from an inner diameter surface of the protector. A boot mounting device comprising a recess for fitting an end.