JPH055298Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a disc brake pad for a vehicle.More specifically, the invention relates to a disc brake pad for a vehicle. A mounting member fixed to the rotating part, a first friction pad supported movably in the disk axial direction by the mounting member, and a piston for pressing the first friction pad against one side of the disk are built in. and a caliper supported movably in the disk axial direction by the mounting member and a reaction portion of the caliper located on the other side of the disk so that the piston presses the first friction pad against the disk. The second plate is pressed against the other side of the disk by the caliper due to the reaction.
The present invention relates to a disc brake pad for a vehicle equipped with a friction pad.

(Prior Art) Conventionally, there has been a disc brake pad of this type as disclosed in Japanese Utility Model Application Publication No. 53-288.
In this product, a pair of notches facing each other is formed in the reaction part of the caliper, and protrusions that fit into these notches are provided by press working on the back plate of the second friction pad, and these notches and protrusions are The second friction pad is supported by the caliper by fitting. Although the second friction pad is not intended to be supported by the caliper, it is disclosed in Utility Model Application Publication No. 59-63236 and Utility Model Application Publication No. 59-632 as a pad in which protrusions are formed by pressing on the back plate of the pad. 108831
What is shown in the publication is already known.

(Problem to be solved by the invention) However, in the conventional pad described above, a recess is formed on the surface of the back plate, which is the adhesive surface of the lining, by press processing, and a protrusion is formed on the back side at a position opposite to the recess. In other words, the material is extruded from the back surface as a protrusion by the amount corresponding to the recessed portion of the surface. Therefore, if the diameter, height, etc. of the protrusion are sufficient to support the pad, the thickness of the thin part formed between the protruding starting end of the protrusion (base of the protrusion) and the recess of the back plate will become thinner (thin part (the degree of drawing becomes severe), the flow of material in the thin section is cut off, and there is a problem that sufficient strength cannot be ensured to counter the shearing force applied to the protrusion during braking.

Therefore, the technical problem of the present invention is to ensure sufficient strength of the protrusion that protrudes from the back plate of the pad so as to be supported by the reaction part of the caliper.

[Structure of the idea]

(Means for Solving the Problem) The technical means taken to solve the above technical problem is to form a strip on the surface of the back plate of a disc brake pad, which is made by bonding a lining to the surface of the back plate. A concave portion is formed from the peripheral edge of the back plate, a conical concave portion is further formed within the concave portion, and a protrusion is formed at a position opposite to the conical concave portion on the back surface of the back plate.

(Function) As a result, the material of the recess formed from the band-shaped peripheral edge on the surface of the back plate of the pad and the material of the conical recess formed within the recess are transferred to the conical shape of the back surface. Since it can be extruded as a protrusion in a position opposite to the recess, even if the diameter and height of the protrusion are sufficient,
The thickness of the thin section formed between the protruding starting end of the protrusion and the conical recess is thicker than in the conventional technology (the degree of drawing on the thin section is less than in the conventional technique), and the flow of material in the thin section is increased. This prevents the protrusions from cutting and ensures sufficient strength to withstand the shearing force applied to the protrusions during braking.

(Embodiment) Hereinafter, one embodiment of a disc brake pad according to the present invention will be described based on the drawings.

In Figures 1 to 3, 1 is a disk that rotates integrally with the vehicle (not shown), and 2 is a mounting member that is fixed to a non-rotating part (not shown) such as a knuckle of the vehicle inside the vehicle of the disk 1. There is. The mounting member 2 guides and supports a pad 3 on the inside of the vehicle of the disk 1 so as to be slidable in the axial direction of the disk 1. Piston 5 that presses pad 3 against disk 1
The caliper 8 has a cylinder part 6 with a built-in cylinder part 6 and a reaction part 7 for pressing the pad 4 located on the outside of the vehicle of the disc 1 onto the disc 1. It includes a cylindrical portion 9 and a cylindrical portion 10 having a through hole. Each of the cylindrical parts 9 and 10 is slidably fitted onto guide pins 11 and 12 fixed to the mounting member 2, so that the caliper 8 is attached to the mounting member 2 in the axial direction of the disk 1. is slidably supported. Cylindrical part 9 of caliper 8
On the outside of the vehicle, one end is attached to the outer periphery of the guide pin 11,
Further, a boot 13 is provided, the other end of which is attached to the cylindrical portion 9 in a liquid-tight manner, and the cylindrical portion 10
An elastic bushing 14 is fitted into the inner surface of the through hole, and the sliding surface of the guide pin 12 is surrounded by the thin wall portion of the elastic bushing 14 that extends inside the vehicle, thereby preventing pebbles and the like thrown up by the wheels. Protects the sliding surface of the guide pin from flying objects, water, and foreign objects.

Further, a pair of protrusions 4b, 4c protruding outward from the vehicle is provided on the back plate 4a of the pad 4 on the outside of the vehicle. The pad 4 is fitted into a pair of axial through holes 7a and 7b, thereby supporting the pad 4 on the reaction portion 7 of the caliper 8. Incidentally, a projection 4d is formed between the pair of projections 4b and 4c for mounting a spring to suppress the rattling of the pad 4 due to the fitting gap between the projections 4b and 4c in the through holes 7a and 7b. .

In this embodiment, as shown in FIGS. 4 to 6, the back plate 4a of the pad 4 has a concave portion 4g extending over the entire circumference from the band-shaped peripheral edge 4f to the front surface 4e.
In addition, a conical recess 4h is formed in the recess 4g, and protrusions 4b, 4c, 4d are provided at positions facing the conical recess 4h on the back surface 4i of the back plate 4a.
is protruded by extruding the material, and its surface 4
When heating and forming lining 15 on e, lining 1
5 is glued. In addition, the protrusion 4b of the back plate 4a,
For example, the formation of 4c and 4d corresponds to the shape of the back surface 4i of the back plate 4a, and the outer shape and protrusions 4b and 4
Place the back plate 4a on top of the lower die having holes corresponding to holes c and 4d, and from the opposite side, the surface shape of the surface 4e of the back plate 4a has a peripheral portion 4f, a recess 4g, and a surface shape corresponding to the conical recess 4h. It is made by pressing with an upper die.

The operation of this embodiment having the above configuration will be explained.

When the brake pedal is stepped on, the hydraulic pressure increases to the cylinder part 6.
When the pressure is applied to the piston 5, the piston 5 slides and presses the pad 3 against the disk 1, and as a reaction, the reaction section 7 presses the pad 4 against the disk, producing a braking action.

At this time, the pad 4 tries to move in the disk rotation direction due to the frictional force between the lining 15 and the disk 1, and in this embodiment, the pad 4 tries to move in the disk rotation direction.
The protrusions 4b, 4c are suppressed by being pressed against the inner surfaces of the through holes 7a, 7b due to the fitting between the pads 4 and the through holes 7a, 7b of the reaction part 7, but in the present invention, the pads 4 are The material of the recess 4g formed from the band-shaped peripheral edge 4f over the entire circumference of the front surface 4e of the plate 4a and the material of the conical recess 4h formed within the recess 4g are added to the conical portion of the back surface 4i. A protrusion 4b at a position opposite to the shaped recess 4h,
4c and 4d are extruded, so the protrusion 4
The thickness of the thin-walled portion 4k formed between the protruding starting end 4j of the protrusions 4j of b, 4c, 4d and the conical recess 4h of the back plate 4a is thicker than in the prior art (the degree of drawing for the thin-walled portion is greater than in the prior art). The flow of material in the thin portion 4k is not cut, and sufficient strength can be ensured to counter the shearing force applied to the protrusions 4b, 4c, and 4d during braking.

Further, according to the present invention, since the lining 15 is surrounded by the band-shaped peripheral portion 4f over the entire circumference, the lining 15 is surrounded by the frictional force with the disk 1.
No shear force is applied to the joint surface between the back plate 4a and the back plate 4a, and the shear strength of the joint surface can be improved.

[Effect of idea]

According to the present invention, it is possible not only to ensure sufficient strength of the protrusion formed on the back plate of the pad in order to support the pad on the reaction part of the caliper, but also to secure the joint surface between the back plate and the lining. 2
By forming the pad in stages, it has the excellent effect of providing a pad that is also advantageous in terms of rust prevention.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a disc brake equipped with pads according to the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a side view of Fig. 5 is a plan view of a disc brake pad according to the present invention, and FIG. 6 is a sectional view taken along CC in FIG. 5. 4... Padded, 4a... Back plate, 4b, 4c, 4
d...Protrusion, 4e...Surface, 4f...Periphery, 4
g...Recess, 4h...Conical recess, 15...Lining.

Claims (1)

[Scope of utility model registration request] In a disc brake pad made by adhering a lining to the surface of a back plate, a concave portion is formed on the surface of the back plate from the band-shaped peripheral edge thereof, and a conical concave portion is further formed within the concave portion to form a conical concave portion on the surface of the back plate. A pad for a disc brake, characterized in that a protrusion is formed on the back surface of the plate at a position opposite to the conical recess.