JP2021017895A - Disc brake - Google Patents

Abstract

To suppress increase in equipment cost when additionally equipping a parking brake to a disc brake equipped with a service brake.SOLUTION: In a disc brake 2, a caliper 4a of a service brake 4 and a caliper 5a of a parking brake 5 are supported by a knuckle 1 via a single bracket 6. The caliper 4a of the service brake 4 is tightened to the knuckle 1 by tightening members (male screws 8, 8). The bracket 6 is tightened together with the knuckle 1 at the same positions as the tightening positions (1e, 1e) of the caliper 4a utilizing the tightening members (male screws 8, 8). The caliper 5a of the parking brake 5 is tightened to the bracket 6 by tightening members (male screws 9,9) different from the tightening members (male screws 8,8) at positions (6e, 6e) apart from the tightening positions (1e, 1e).SELECTED DRAWING: Figure 1

Description

The present invention relates to a disc brake equipped with a service brake and a parking brake.

For example, Patent Document 1 describes that a vehicle disc brake device is equipped with a service brake and a parking brake.

In Patent Document 1, the caliper of the service brake is supported by incorporating the caliper of the parking brake.

Further, for example, Patent Document 2 describes that a caliper of a service brake and a caliper of a parking brake are supported by a slide pin on a single mount (torque member), respectively.

JP-A-2015-124812 JP 2015-004412

In Patent Document 1, the caliper of the parking brake is assembled to the caliper of the service brake. Therefore, the caliper of the service brake is provided, for example, in a disc brake device not equipped with the parking brake. The caliper of the existing service brake cannot be used as it is.

That is, when the caliper of the parking brake is assembled to the caliper of the service brake, the caliper of the service brake needs to be specially designed, which increases the equipment cost.

Since there is no description in Patent Document 2 whether or not a mount supporting the caliper of the service brake and the caliper of the parking brake is fastened to the vehicle body side, it is unknown, but this mount is attached to the vehicle body. In the case of fastening to the vehicle body, it is necessary to provide the mount with a fastening portion to the vehicle body in addition to the supporting portion of each caliper, which increases the equipment cost.

In view of such circumstances, an object of the present invention is to make it possible to suppress an increase in equipment cost when a parking brake is additionally equipped on a disc brake equipped with a service brake.

The present invention is a disc brake equipped with a service brake and a parking brake, wherein the caliper of the service brake and the caliper of the parking brake are supported by a knuckle via a single bracket, and the caliper of the service brake The caliper is fastened to the knuckle by a fastening member, and the bracket is co-fastened to the knuckle at the same position as the caliper fastening position of the service brake by using the fastening member of the parking brake. The caliper is characterized in that the bracket is fastened to a position away from the fastening position by a fastening member different from the fastening member.

According to this configuration, when the parking brake is additionally equipped on the disc brake equipped with the service brake, it is not necessary to change the design of the caliper of the service brake and it is not necessary to excessively increase the number of fastening points. .. This makes it possible to suppress an increase in the equipment cost of the disc brake according to the present invention.

By the way, in the disc brake, the knuckle has a knuckle body provided with a hub unit for mounting a disc rotor, and each fastening member is a male screw, and the caliper of the service brake, the bracket, and the parking are used. The caliper of the brake is provided with a through hole through which the male screw as the fastening member is inserted, and the caliper of the service brake and the male screw as the fastening member of the bracket are screwed into the knuckle body. The bracket is provided with a female screw hole, and the bracket may be provided with a female screw hole into which a male screw as a fastening member of the caliper of the parking brake is screwed.

According to this configuration, the number of parts for fastening the caliper of the service brake and the bracket and the caliper of the parking brake to the knuckle body can be reduced as much as possible.

INDUSTRIAL APPLICABILITY The present invention makes it possible to suppress an increase in equipment cost when a parking brake is additionally equipped on a disc brake equipped with a service brake.

FIG. 5 is a plan view of an embodiment of the disc brake according to the present invention as viewed from the back side (inside the vehicle body when mounted on the vehicle body). It is an exploded perspective view which shows the disc rotor and the knuckle in the disc brake of FIG. It is an exploded perspective view which shows the caliper of a disc brake, the caliper of a parking brake, and a bracket in the disc brake of FIG.

Hereinafter, the best embodiment for carrying out the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention. In the figure, 1 indicates a knuckle and 2 indicates a disc brake.

The knuckle 1 mainly includes a knuckle body 1a, an upper connecting portion 1b, a lower connecting portion 1c, and the like.

The knuckle body 1a is provided with a hub unit 1d. A disc rotor 3 and wheels (not shown) are attached to the hub unit 1d.

The upper connecting portion 1b is provided so as to extend upward above the knuckle body 1a, and is connected to an upper arm of a vehicle body (not shown).

The lower connecting portion 1c is provided so as to extend downward to the lower part of the knuckle body 1a, and is connected to a lower arm of a vehicle body (not shown).

The disc brake 2 is mainly equipped with a disc rotor 3, a service brake 4, a parking brake 5, a bracket 6, a dust cover 7, and the like.

The disc rotor 3 is rotationally and integrally attached to a rotating member (not shown) of the hub unit 1d of the knuckle 1.

The service brake 4 is, for example, an opposed piston type. Although not shown in detail, the service brake 4 is provided with a pair of brake pads (not shown) on the disc rotor 3 by, for example, hydraulically operating a pair of pistons (not shown) incorporated in the caliper 4a so as to face each other. The disc rotor 3 is configured to generate a rotational braking force by pressure contacting the disc rotor 3.

The parking brake 5 is, for example, a floating type. Although not shown in detail, the parking brake 5 is operated by, for example, hydraulically operating a piston (not shown) incorporated in the caliper 5a to bring one brake pad (not shown) into pressure contact with the disc rotor 3. The caliper 5a is floated by a reaction force and the remaining one brake pad is pressed against the disc rotor 3 to generate a rotational braking force of the disc rotor 3.

The service brake 4 and the parking brake 5 are supported by the knuckle 1 via a single bracket 6.

This support form will be described in detail.

As shown in FIGS. 1 and 3, the caliper 4a of the service brake 4 is provided with two mounting pieces 4b and 4b. The mounting pieces 4b and 4b are provided with through holes 4c and 4c that penetrate in the thickness direction, respectively.

As shown in FIGS. 1 and 3, the caliper 5a of the parking brake 5 is provided with two mounting pieces 5b and 5b. The mounting pieces 5b and 5b are provided with through holes 5c and 5c that penetrate in the thickness direction, respectively.

As shown in FIG. 3, the bracket 6 is made of a strip-shaped plate formed so as to be L-shaped in an upside-down direction, and has a long portion 6a, a short portion 6b, and a protruding piece 6c. ..

Then, the caliper 4a of the service brake 4 is fastened to the knuckle body 1a of the knuckle 1 by a fastening member, and the long portion 6a of the bracket 6 is at the same position as the fastening position of the caliper 4a of the service brake 4 on the knuckle body 1a. It is fastened together using a fastening member, and the caliper 5a of the parking brake 5 is fastened to the short portion 6b of the bracket 6 by a fastening member different from the fastening member.

Specifically, the fastening member for fastening the long portion 6a is, for example, a male screw 8 such as a hexagon bolt, and the fastening member for fastening the caliper 5a of the parking brake 5 is, for example, a male screw such as a hexagon bolt. It is said to be 9.

As shown in FIG. 3, the long portion 6a of the bracket 6 is provided with two through holes 6d and 6d. The above-mentioned male screw 8 is inserted into the two through holes 6d and 6d.

As shown in FIGS. 2 and 3, female screw holes 1e and 1e are provided at positions of the knuckle body 1a corresponding to the through holes 6d and 6d of the long portion 6a of the bracket 6. The male screw 8 described above is screwed into the female screw holes 1e and 1e.

As shown in FIG. 3, female screw holes 6e and 6e are provided in the short portion 6b of the bracket 6. A male screw 9 is screwed into the female screw holes 6e and 6e.

The female screw holes 6e and 6e are configured as follows in order to make the length in the axial direction as long as possible. That is, a through hole (not shown) is provided at a position where the female screw holes 6e and 6e are planned to be formed in the short portion 6b of the bracket 6, and the back side of the through hole (the side opposite to the mounting side of the mounting pieces 5b and 5b of the caliper 5a) is provided. The cylindrical members 6g and 6g are joined to form a female screw groove straddling the through hole and the central hole of the cylindrical member 6g.

By the way, in this embodiment, in order to increase the support rigidity of the caliper 5a of the parking brake 5 in the bracket 6, the protruding piece 6c of the bracket 6 is fastened to the knuckle body 1a by a fastening member.

The fastening member is, for example, a male screw 10 such as a hexagon bolt. The male screw 10 has a size smaller than that of the male screw 8 described above.

As shown in FIG. 3, the protruding piece 6c of the bracket 6 is provided with one through hole 6f. The above-mentioned male screw 10 is inserted through the through hole 6f.

As shown in FIG. 2, a female screw hole 1f is provided at a position corresponding to the through hole 6f of the protruding piece 6c of the bracket 6 in the knuckle body 1a. The above-mentioned male screw 10 is screwed into the female screw hole 1f.

Next, the procedure for assembling the disc brake 2 of the above-described embodiment will be described.

First, the long portion 6a and the protruding piece 6c of the bracket 6 are applied to the knuckle body 1a, and the caliper 4a of the service brake 4 is applied to the long portion 6a of the bracket 6.

At this time, the two through holes 6d and 6d of the long portion 6a are made into the two female screw holes 1e and 1e of the knuckle body 1a, and the one through hole 6f of the protruding piece 6c is made into one female screw hole 1f of the knuckle body 1a. The male screws 8 and 8 are caliped by matching the two through holes 6d and 6d of the long portion 6a with the through holes 4c and 4c of the two mounting pieces 4b and 4b of the caliper 4a. Insert the male screws 8 and 8 so as to straddle the two through holes 4c and 4c and the two through holes 6d and 6d of the long portion 6a from the side of 4a, and screw the male screws 8 and 8 into the female screw holes 1e and 1e of the knuckle body 1a. At the same time, the male screw 10 is inserted into one through hole 6f of the protruding piece 6c of the bracket 6, and the male screw 10 is screwed into one female screw hole 1f of the knuckle body 1a.

After that, the caliper 5a of the parking brake 5 is fixed to the short portion 6b of the bracket 6 fixed to the knuckle body 1a.

At this time, the two female screw holes 6e and 6e in the short portion 6b of the bracket 6 are matched with the through holes 5c and 5c in the two mounting pieces 5b and 5b of the caliper 5a, respectively, and the two mounting pieces of the caliper 5a are matched. Male threads 9 and 9 are inserted into the through holes 5c and 5c in 5b and 5b from the caliper 5a side, and the male threads 9 and 9 are screwed into the two female thread holes 6e and 6e in the short portion 6b of the bracket 6.

As a result, the service brake 4 and the parking brake 5 are supported by the knuckle body 1a of the knuckle 1 via a single bracket 6.

As described above, in the embodiment to which the present invention is applied, when the parking brake 5 is additionally equipped on the disc brake 2 equipped with the service brake 4, the service brake 4 and the parking brake 5 are attached to the bracket 6. The caliper 4a of the service brake 4 is not shown, for example, but the service brake equipped on the disc brake not equipped with the parking brake 5 as described above, because the caliper 4a of the service brake 4 is installed at a separated position. The caliper can be used as it is, eliminating the need for design changes.

Moreover, in this embodiment, since the bracket 6 is fastened together with the common fastening member (male screw 8) at the fastening position of the caliper 4a of the service brake 4 with respect to the knuckle 1, the service brake 4 and the parking brake are fastened together. It is not necessary to excessively increase the number of fastening points for attaching the 5 to the knuckle 1.

From these facts, the disc brake 2 according to this embodiment can suppress an increase in equipment cost.

The present invention is not limited to the above embodiment, and can be appropriately modified within the scope of claims and within the scope equivalent to the scope.

(1) In the above embodiment, the model of the service brake 4 and the parking brake 5 is not particularly limited.

(2) In the above embodiment, an example is given in which a protruding piece 6c is provided on the bracket 6 and the protruding piece 6c is fastened to the knuckle body 1a of the knuckle 1 with a male screw 10, but this is the only example of the present invention. The bracket 6 is not limited to the above, and can be configured to eliminate the protruding piece 6c from the bracket 6, for example.

(3) In the above embodiment, the fastening member of the service brake 4 and the fastening member of the parking brake 5 are male screws 8 and 9, and two female screw holes 1e and 1e are provided in the knuckle body 1a and two in the short portion 6b of the bracket 6. Although an example in which the female screw holes 6e and 6e are provided is given, the present invention is not limited to this.

For example, although not shown, both of the fastening members have a configuration in which male threads 8 and 9 and female threads such as hexagon nuts are combined, and the two female thread holes 1e and 1e of the knuckle body 1a and the short portion 6b of the bracket 6 are formed. The two female screw holes 6e and 6e can be used as through holes.

The procedure for assembling the disc brake 2 in this case will be described.

First, the long portion 6a and the protruding piece 6c of the bracket 6 are applied to the knuckle body 1a, and the caliper 4a of the service brake 4 is applied to the long portion 6a of the bracket 6.

At this time, the two through holes 6d and 6d of the long portion 6a are matched with the two through holes (not shown) of the knuckle body 1a, respectively, and the calipers 4a are formed in the two through holes 6d and 6d of the long portion 6a. Align the two through holes 4c and 4c, respectively, and extend the male screws 8 and 8 from the caliper 4a side to the two through holes 4c and 4c and the two through holes (not shown) of the knuckle body 1a. The male screw 8 and 8 are projected to the outside of the knuckle body 1a, and a female screw (not shown) is screwed into the portion of the male screw 8 and 8 protruding outward.

Further, one through hole 6f of the protruding piece 6c is matched with one female screw hole 1f of the knuckle body 1a, a male screw 10 is inserted from one through hole 6f of the protruding piece 6c, and the male screw 10 is inserted into the knuckle body. It is screwed into the female screw hole 1f of 1a.

After that, the caliper 5a of the parking brake 5 is fixed to the bracket 6 fixed to the knuckle 1.

At this time, the two through holes (not shown) in the short portion 6b of the bracket 6 are matched with the through holes 5c and 5c in the two mounting pieces 5b and 5b of the caliper 5a, and the male screws 9 and 9 are set in the caliper. Insert the male screws 9 and 9 from the side of 5a so as to straddle the two through holes 5c and 5c and the two through holes (not shown) in the short portion 6b, and project the male screws 9 and 9 toward the knuckle body 1a in the short portion 6b. Then, a female screw (not shown) is screwed into a portion of the male screws 9 and 9 that protrudes outward.

As a result, the service brake 4 and the parking brake 5 are supported by the knuckle body 1a of the knuckle 1 via a single bracket 6.

The present invention can be suitably used for a disc brake equipped with a service brake and a parking brake.

1 knuckle
1a knuckle body
1e Female screw hole for fastening service brake and bracket 2 Disc brake 3 Disc rotor 4 Service brake
4a caliper
4b mounting piece
4c through hole 5 parking brake
5a caliper
5b mounting piece
5c through hole 6 bracket
6a long part
6b short part
6d Long through hole
6e Female screw hole in short part 7 Dust cover 8 Male screw for fastening service brake and bracket (fastening member)
9 Male screw for fastening the parking brake (fastening member)

Claims (1)

A disc brake equipped with a service brake and a parking brake.
The caliper of the service brake and the caliper of the parking brake are supported by the knuckle via a single bracket.
The caliper of the service brake is fastened to the knuckle by a fastening member.
The bracket is fastened together with the knuckle at the same position as the fastening position of the caliper of the service brake by using the fastening member.
A disc brake characterized in that the caliper of the parking brake is fastened to a position away from the fastening position in the bracket by a fastening member different from the fastening member.

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