JPS6340051Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a vehicle brake mounting device.

Conventionally, drum brake types and disc brake types are known as brake devices for vehicles.

FIG. 1 shows a known example of a drum brake. In FIG. 1, an axle tube 2 is attached to an axle housing 1, and a brake mounting flange 3 provided on the axle housing 1 is attached to the outside (in the drawing). A brake bracket 4 is attached from the right side via its flange 5 with bolts 8. Further, the flange 5 and the axle housing 1 are engaged with each other by a spigot 7 and are positioned. A brake shoe 6 is provided radially outward of the brake bracket.

In this known technique, the brake mounting flange 3
Since the brake bracket 4 is fixed with the bolt 8 with a female thread on the axle housing 1, the entire axle housing 1 has to be replaced if the female thread is damaged. Further, when the spigot 7 is formed, the radius becomes smaller and the arc-shaped chamfer (usually referred to as R) becomes smaller, so stress is concentrated on the spigot 7, which causes a disadvantage in terms of strength.

Further, FIG. 2 shows a conventional example of a disc brake, in which a brake bracket 4a is attached to a brake mounting flange 3a with bolts 8a. 9 in the figure is a disc brake rotor.

In such conventional technology, stress concentration is still high at the spigot 7, and the brake mounting flange 3a is welded at the location indicated by the symbol W after the axle housing 1 and axle tube 2 are welded, making the work cumbersome. Moreover, since the bolt 8a had to be tightened from the left side of the drawing, that is, from the inside, the workability was extremely poor. That is, as shown by the broken line 8b, if the bolt is inserted from the right side of the drawing, that is, from the outside, it will interfere with the disc brake rotor 9.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle brake mounting device that is extremely easy to work with and does not cause stress concentration. This invention can be applied to both drum brakes and disc brakes.

According to the present invention, a female thread for a mounting bolt is formed on the flange on the brake side, so if the female thread is crushed, the brake bracket can be replaced.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 9.

FIG. 3 shows a first embodiment of the present invention, which is an example applied to a drum brake. In the figure, 1 is an axle housing, 2 is an axle tube, and the brake mounting flange 3, which is welded or integrally formed with the axle tube 2, has a bolt hole 13 portion as a peak portion 14a and a valley portion as shown in FIG. It is formed in the shape of an external gear having 14b. On the other hand, the bracket side flange 5 of the brake bracket 4 is formed in the shape of an internal gear corresponding to the outer shape of the brake mounting flange 3, as shown in FIG.
, and has a valley portion 16b. This brake bracket 4 and brake mounting flange 3
The dimensional relationship between the two is such that they can be fitted as shown in FIG. Therefore, when the brake bracket 4 is inserted from the outer end side of the axle tube 2 and the ridges 14a and troughs 16b are aligned, and the troughs 14b and ridges 16a are aligned, the brake bracket 4 is installed. It can pass through the flange (see Figure 4).

Now, when installing it to the brake mounting flange 3 on the axle tube 2 side, insert the brake bracket 4 from the outside of the axle tube 2, pass the brake bracket 4 through it once in the state shown in Fig. 4, and then insert it as shown in Fig. 4. Rotate the brake bracket 4 slightly and insert both bolt holes 1.
3 and 15, and fix them together with bolts 10 as shown in FIG. In this case, the tightening operation using the bolts 10 can be performed from the outer end side of the axle tube (the right side in the drawing). The brake bracket and brake mounting flange should be aligned using the spigot 7.

FIG. 6 shows a second embodiment of the present invention, in which a disc brake is attached. In the figure, 1 is an axle housing, 2 is an axle tube, and a plurality of bolt holes 13 are formed at an angle of 180 degrees on the outer periphery of a brake mounting flange 3 that is welded or integrally formed with the axle tube, as shown in FIG.
It is formed in two mountain parts 20a that are separated by a degree,
A valley portion 20b is formed in a portion other than the peak portion 20a where these bolt holes 13 are provided. On the other hand, the inner periphery of the bracket-side flange 5 of the brake bracket 4 is provided with a hole 21 having a shape compatible with the brake mounting flange 3, as shown in FIG. It has a trough 22b that fits into the section 20a, a plurality of bolt holes 15, and a crest 22a that fits into the trough 20b. This mountain part 22
a constitutes a flange 5. In this embodiment, as in the first embodiment, when attaching the brake bracket 4 to the brake attachment flange 3 on the axle tube 2 side, the brake bracket 4 is inserted from the outside of the axle tube 2 and passed through the brake attachment flange 3 once. , then rotate the brake bracket 4 about 90 degrees and insert both bolt holes 1.
3 and 15 should be aligned and fixed with bolts 10. FIG. 9 shows the assembled state.

Although the two embodiments have been described above, the arrangement of the bolt holes and the shapes of the peaks and valleys can be modified in various ways.

As described above, according to the present invention, the brake mounting flange 3 provided on the axle housing is provided with the peak portions 14a, 20a projecting outward in the radial direction and the valley portions 14b, 20b notched inward in the radial direction. A bolt hole 13 is formed in the ridges 14a, 20a, and the brake bracket 4 has ridges 16a, 22a that protrude radially inward and are notched radially outwardly to fit the brake mounting flange 3. It has troughs 16b and 22b, and a crest 16.
Since a bolt hole 15 with a female thread is provided in a and 22a at a position that matches the bolt hole 13, the brake bracket 4 is inserted from the axle tube side, positioned inside the brake mounting flange 3, and then rotated by a predetermined angle. By doing so, the bolt holes 13 and 15 can be aligned, and both can be fixed with a female thread cut on the brake side flange 5 side. Therefore, as shown in FIGS. 5 and 9, the bolt 10
Since it can be tightened from the outside (axle tube side), work efficiency is improved and a female thread can be formed on the brake bracket side, so if the female thread becomes crushed, only the brake bracket needs to be replaced. Further, in both cases, since the position of the spigot 7 can be formed to have a large diameter inside the housing of the brake mounting flange, stress concentration is relatively small, and a durable mounting structure can therefore be obtained.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are partially sectional side views showing a drum brake device and a disc brake device, respectively, according to the prior art. Fig. 3 is an exploded perspective view showing the first embodiment of the present invention, Fig. 4 or an explanatory view showing its mounting means, Fig. 5 is a side view partially showing the mounting state, and Fig. 6 is the main body. FIG. 7 is a front view of the brake bracket, FIG. 8 is a front view of the brake mounting flange, and FIG. 9 is a side view partially showing the mounting state of the brake bracket. . 1... Axle housing, 2... Axle tube, 3... Brake mounting flange, 4... Brake bracket, 5... Bracket side flange, 6... Bolt hole, 7... Pilot part, 8...
...Bolt, 9...Disc brake rotor, 10
...Bolt, 11...Brake drum, 13...
Bolt hole, 14a, 20a... Peak part of brake mounting flange, 14b, 20b... Valley part of brake mounting flange, 15... Bolt hole, 16a, 22
a... Brake bracket peak, 6b, 22b
...Brake bracket valley.

Claims (1)

[Scope of utility model registration request] The brake mounting flange provided on the axle housing is provided with a peak projecting outward in the radial direction and a valley notched in the radial direction, a bolt hole is formed in the peak, and a bolt hole is formed in the peak, and a bolt hole is formed in the peak part, and a bolt hole is formed in the peak part. Forms a ridge projecting radially inward and a trough notched radially outward to fit the brake mounting bracket, and the ridge is provided with a female thread at a position that coincides with the bolt hole. A brake mounting device for a vehicle, characterized in that it is provided with a bolt hole.