JP2571186Y2 - Disc brake 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 disk brake device used for a vehicle such as an automobile or a motorcycle, and more particularly, to a bracket disposed on one side of the brake disk and spaced apart from each other in a circumferential direction of the brake disk. And a pair of support portions straddling the brake disk are integrally formed, and shoulder portions of a pair of friction pads facing both side surfaces of the brake disk are slidably fitted in these support portions in the axial direction of the brake disk. Providing a lower jaw and an upper jaw of the guide groove, connecting the free ends of the two support parts to each other via a tie bar,
The present invention relates to an improvement in which a brake caliper is connected to a bracket to press the friction pads against a brake disc.

[0002]

2. Description of the Related Art Such a disk brake device is disclosed in, for example, Japanese Utility Model Laid-Open No. 3-60626.
Already known.

[0003]

Conventionally, in such a disk brake device, the guide groove of the bracket support portion is formed by broaching, but it is possible to manufacture a dedicated broach before the processing. Because it requires a considerable cost, the cost is inevitably high.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disk brake device capable of forming a guide groove in a support portion of a bracket without using an expensive broach. And

[0005]

In order to achieve the above object, the present invention comprises a tie bar formed separately from a bracket, an upper jaw formed integrally with the tie bar, and the tie bar being supported on both sides of the bracket. The first feature is that it is fixed to the portion.

The present invention has a second feature in that, in addition to the above features, the tie bar is further formed integrally with a lower jaw at the free end of the support portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an automobile disc brake device will be described below with reference to the drawings. First, a first embodiment of the present invention shown in FIGS. 1 to 3 is started.

1 and 2, a bracket B is disposed adjacent to one side of a brake disc D which rotates together with the wheels of an automobile. The bracket B is fixed to a knuckle (not shown) of an automobile with bolts 1 (FIG. 2). The bracket B includes a pair of inverted U-shaped supports which straddle the brake disk D while being spaced apart in the circumferential direction of the brake disk D. parts 2,2 are integrally formed, a pair of friction pads P ₁ which faces to both sides of the brake disc D, P ₂ is supported.

[0009] That is, the back plate 3 ₁ of the friction pads P _1, P _2,
3 _2, shoulders 4 ₁ at both ends along the circumferential direction of the brake disc D, 4 _1; 4 _2, 4 ₂ provided with a, these shoulders _41, 42 _1; 4 _2, 4 ₂ the supporting part The brake disc D is slidably fitted in the guide grooves 5 and 5 via retainers 6 and 6 in the axial direction of the brake disk D. Each guide groove 5 is defined by opposing lower jaw 7 and upper jaw 8.
The lower jaw 7 is formed integrally with the corresponding support 2, and the upper jaw 8 is formed integrally with a tie bar 9 described later.

[0010] A brake caliper C is connected to the bracket B via a pair of sliding pins 10, 10 parallel to the axis of the brake disc D at the two support portions 2, 2. That is, these sliding pins 10 and 10 are fixed to the brake caliper C with bolts 11 and 11 and slidably fitted into bag-like supporting holes 12 and 12 formed in both supporting portions 2 and 2. You. The exposed portion of each slide pin 10 from the support hole 12 is covered with an elastic dustproof boot 13.

A brake caliper C is provided so as to straddle the first and second arms 14 ₁ and 14 ₂ opposing each other on both sides of the brake disc D with the friction pads P ₁ and P ₂ therebetween. A bridge portion 15 for integrally connecting the arms 14 ₁ and 14 ₂ , and the bridge portion 15 is provided with an inspection window 16. The back plate 3 ₁ of the bridge portion 15 both friction pads P _1, P _2,
3 between the _2, the pad spring 17 is interposed to suppress the vibration of the friction pad P _1, P _2.

[0012] The hydraulic cylinder 18 in the first arm portion 14 ₁ of the brake caliper C, and provided with an input port 19 for introducing the output hydraulic pressure of known master cylinder to the hydraulic cylinder 18, one of the friction in the hydraulic cylinder 18 piston 20 is fitted slidably capable of pressing the backing plate 3 _first pad P _1. The second arm portion 14 ₂ is in contact in order to push it to the back plate 3 ₂ of the other friction pad P _2.

As shown in FIGS. 1 to 3, the free ends of the two supporting portions 2 and 2 of the bracket B bent in an inverted U-shape are connected to the second arm portion 14 ₂ so as to interconnect them. The two ends of the tie bar 9 which bypasses are fixed. That is, the tie bar 9 is made of a steel plate and is separate from the bracket B. The tie bar 9 has a rod-shaped portion 21 having an L-shaped cross section, and a pair of long and short upper and lower mounting pieces 22 formed at each end of the rod-shaped portion. , 23. The upper mounting piece 22 is fixed to the upper surface of the corresponding support part 2 by two bolts 24, and the lower mounting piece 23 is fixed to the lower surface of the corresponding support part 2 by one bolt 25. As described above, the upper mounting piece 24 is integrally formed with the upper jaw 8 defining the guide groove 5 in cooperation with the lower jaw 7 integral with the corresponding support 2.

Next, the operation of this embodiment will be described.

A master cylinder (not shown) is operated by operating the brake pedal, and the output oil pressure is applied to the input port 1.
9 to the hydraulic cylinder 18, the piston 2
Since 0 presses the back plate 3 ₁ of the friction pad P ₁ of one advances, the friction pad P ₁ is the guide groove 5 of the support portions 2,
5 is pressed against one side surface of the brake disc D.
Then, due to the reaction force, the brake caliper C causes the two sliding pins 10, 10 to respectively support the support holes 12, 1 of the support portions 2, 2.
2 moves from sliding in the forward and opposite directions of the piston 20 to, the second arm portion 14 ₂ presses the back plate 3 ₂ of the other friction pad P _2, press it to the other side of the brake disk D Let it. Thus, a braking force is applied to the wheels via the brake disc D.

During this braking, the braking torque acting on the friction pads P ₁ and P ₂ from the brake disk D is supported by the support 2 on the brake disk D rotation exit side. Further, the braking torque is transmitted from the supporting portion 2 to the other supporting portion 2 via the tie bar 9, so that the braking torque is eventually shared between the two supporting portions 2 and 2. The deformation of the support portions 2 can be minimized.

The tie bar 9 is mounted on the bracket B
And the tie bar 9
Friction pads P _1, the shoulder portion 4 ₁ P _2, 4 _1; since the 4 _2, 4 upper jaw 8 of the guide grooves 5 and 5 for guiding the _second sliding integrally formed, when a single bracket B, the It is sufficient that only the lower jaw 7 is provided integrally with the support 2, so that the shape of each support 2 is simple, and it can be easily processed with a normal rotary blade.

FIG. 4 shows a second embodiment of the present invention.
The free end of the support portion 2 of the bracket B is formed so that the upper and lower widths thereof are equal to the upper and lower widths of the guide groove 5, and the upper mounting piece of the tie bar 9 fixed to the upper surface of the support portion 2 with bolts 24, 24. Similarly to the previous embodiment, a pair of left and right upper jaws 8, 8 are formed integrally with each other, and a bolt 2 is provided on the lower surface of the support portion 2.
The upper jaw 8 on the free end side of the support portion 2 is integrally formed with the lower mounting piece 23 fixed at 5, and in the figure, portions corresponding to those in the previous embodiment are denoted by the same reference numerals. .

According to this embodiment, the shape of the support portion 2 of the bracket B is further simplified, and the processing can be easily performed.

FIG. 5 shows a third embodiment of the present invention.
The tie bar 9 is formed of a relatively thick steel plate, and bolts 3 are attached to the outer surface of the corresponding free end side of the support portion 2 from both ends.
1 to raise the mounting portion 30 to be fixed.
The configuration is the same as that of the first embodiment except that the upper jaw 8 facing the lower jaw 7 of the support portion 2 is extended from FIG. The same reference numerals are given.

[0021]

As described above, according to the first aspect of the present invention, the tie bar is formed separately from the bracket, the upper jaw is formed integrally with the tie bar, and the tie bar is connected to both support portions of the bracket. Since it is fixed to the bracket, when the bracket is alone, it is sufficient that the support portion is provided with only the upper jaw integrally, so the shape of the support portion is simplified, and this can be easily processed with a normal rotary blade tool, The cost can be greatly reduced as compared with the case where a broach dedicated to groove processing is used as in the related art.

According to the second feature of the present invention, since the lower end of the support portion is integrally formed with the tie bar at the free end, the shape of the support portion is further simplified and the processing thereof is easy. Can be done.

[Brief description of the drawings]

FIG. 1 is a plan view of a part of a first embodiment of the present invention;

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

FIG. 3 is an exploded perspective view of a main part of a bracket and a tie bar in FIG. 2;

FIG. 4 is a perspective view of a main part of the second embodiment of the present invention;

FIG. 5 is a perspective view of a main part of the third embodiment of the present invention;

[Explanation of symbols]

2 Support 4 ₁ , 4 ₂ Shoulder 5 Guide groove 7 Lower jaw 8 Upper jaw 9 Tie bar 10 Sliding pin B Bracket C Brake caliper D Brake disc P ₁ , P ₂ Friction pad

Claims (2)

(57) [Scope of request for utility model registration] A bracket (B) arranged on one side of a brake disc (D) is provided with a pair of support portions (2) that are spaced apart from each other in the circumferential direction of the brake disc (D) and straddle the brake disc (D). ) was formed integrally, these support portions (2), shoulder portions of the pair of friction pads facing on both sides of the brake disc _{(D) (P 1, P} 2) (4 1,
4 ₂ ) The lower jaw (7) and the upper jaw (8) of the guide groove (5) into which the brake disk (D) is slidably fitted in the axial direction.
The provided, the two support portions of the free end (2) connected to each other via a tie bar (9), a brake caliper so as to press the both friction pads (P _1, P ₂₎ to the brake disc (D) In a disc brake device in which (C) is connected to a bracket (B), a tie bar (9) is formed separately from the bracket (B), and an upper jaw (8) is formed integrally with the tie bar (9). A disc brake device characterized in that the tie bar (9) is fixed to both support portions (2) of the bracket (B). 2. The disc brake device according to claim 1, wherein the tie bar (9) is further integrally formed with a lower end side lower jaw (7) of a support portion (2).