JPH0529534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a boot mounting structure for a constant velocity joint that connects a drive-side shaft of an automobile and a driven-side wheel independent of the shaft.

[Conventional technology]

Some vehicles suitable for driving on rough terrain, so-called off-road vehicles, are equipped with front and rear differential gears to transmit driving force to both the front and rear wheels.

In such automobiles, as shown in FIG. 3, the shaft 1 of each differential gear and the independent shafts 2 of the front and rear wheels are connected by a constant velocity joint 3.

Generally, the constant velocity joint 3 is provided with an outer race 4 on the shaft 1 side, and an inner race 6 that is connected to the outer race 4 via balls 5 on the shaft 2 side. Then, a structure is used in which a hard and rigid cylindrical seal boot 7, for example, is placed around this connection part to seal the lubricant filled inside to prevent it from leaking to the outside. .

By the way, conventionally, in order to fix the seal boot 5 to the outer race 4, as shown in FIG. Tightening is performed using a ring-shaped band 8 made of a band-shaped plate.

However, since the constant velocity joint 3 is placed near the parts of the car's suspension, when driving on rough roads on the front side, stones and other objects that go around the shaft 1 may hit the band 8 and shift, affecting the fixation. or damage the seal boot 7.

Therefore, in some automobiles, a band protector 9 (corresponding to a band cover) formed in a ring shape is conventionally fitted around the band 8 to protect the band 8.

[Problem that the invention attempts to solve]

However, according to the conventional band protector 9, although it does cover the entire circumference of the hand 8,
The band protector itself tends to shift in the axial direction.
Therefore, if an external force is applied in the axial direction, the band protector 9 may shift in the axial direction and fall off from the hand 8.

This invention was made in view of these circumstances, and its purpose is to provide a constant velocity joint boot mounting structure that can prevent the band cover from falling off.

[Means and actions for solving problems]

Therefore, in order to solve the above problems, this invention has a protrusion 10 that protrudes outward on the outer periphery of the band 8.
... is provided, and a hole 11 that fits into the protrusion 10 is provided in a portion of the band cover 9 that corresponds to the protrusion 10.... To prevent a band cover 9 from shifting even when subjected to external forces such as.

〔Example〕

This invention will be explained below based on an embodiment shown in FIGS. 1 and 2. In addition, in the drawings, parts that are the same as those described in the "Prior Art" section will be given the same reference numerals and their explanations will be omitted, and in this section, different parts (main parts of the invention) will be explained. Make it.

That is, in this embodiment, the protrusions 10 are placed at a plurality of points on the outer circumference of the band 8, for example, at three equal points.
This is different in that the movement of the band protector 9 on the band 8 is restricted using this.

To explain this point, the protrusion 10 has a structure in which a swollen portion for caulking and fixing is used as is, as shown in FIG. 1. Specifically, the bulging portion for caulking has a structure in which a portion of a band-shaped plate formed into a ring shape by locking its ends together is bulged outward into a trapezoidal shape. In other words, after inserting the ring-shaped band plate having this bulge into the end of the seal boot 7, by displacing both side walls of the bulge in the direction toward each other and crimping the band 8, the seal boot 7 can be tightened onto the outer race 4.

A rectangular hole 11 that can fit into the protrusion 10 is bored in a portion of the band protector 9 that corresponds to the position of each trapezoidal protrusion 5 formed of these bulges. provided, and the protrusion 1
The movement of the band protector 9 is restrained by fitting between the holes 11 and 0.

Therefore, after the end of the seal boot 7 on the outer lace 6 side is fitted into the end of the outer lace 6 and the end of the seal boot 7 on the large diameter side is inserted, a band is attached to the end of the boot that overlaps with the outer lace 6. 8
If it is inserted and caulked, it will be fixed to the outer race 4. Then, when the band protector 9 is fitted onto the band 8 while fitting the holes 11 into the protrusions 10, the hand protector 9 is placed onto the band 8 as shown in FIG. It will be installed.

Here, there is a concern that the band protector 9 may become displaced and fall off from the band 8 due to an external force, particularly an external force in the axial direction.

However, according to this invention, the projections 10 provided on the band 8 fit into the holes 11 of the band protector 9, as shown in FIG. I also try not to move. This means that the band protector 9 will not move even if it receives external force.

However, this has the effect of preventing the band protector 9 from falling off. In particular, those using a caulking structure for tightening the band 8,
Since a part of the structure can be reused, it is advantageous in terms of cost and effectiveness.

In one embodiment, the protrusion 10 also serves as a caulking protrusion, but the present invention is not limited to this, and a plurality of protrusions that can be fitted into the hole 11 on the outer periphery of the band 8 may also be provided. A section 10 may also be provided.

[Effect of idea]

According to this invention, which has the gist of the structure described in the above-mentioned utility model registration claim, the band cover is restricted by the fitting between the protrusion and the hole, so that the band cover can be protected even when subjected to external force such as in the axial direction. You can keep it from shifting.

Therefore, it is possible to prevent the band cover from accidentally falling off.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 show an embodiment of this invention, Fig. 1 is an exploded perspective view showing the mounting structure of the seal boot which is the main part, Fig. 2 is a cross-sectional view showing the band cover attached by fitting the protrusion and the hole, Fig. 3 is a perspective view showing a general constant velocity joint, and Fig. 4 is a perspective view showing the mounting structure of the conventional seal boot. 3... constant velocity joint, 4... outer race, 7... seal boot, 8... band, 9...
Band protector (band cover), 10...projection portion, 11...hole portion.

Claims (1)

[Scope of utility model registration request] A constant velocity joint that is made by fitting the end of a seal boot into the end of the outer race of the constant velocity joint, providing a band to tighten the seal boot in this overlapping part, and fitting a ring-shaped band cover around this band. In the boot mounting structure, a protrusion protruding outward is provided on the outer periphery of the band,
A boot mounting structure for a constant velocity joint, characterized in that the band cover corresponding to the projection is provided with a hole that fits into the projection.