JPH0224980Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to improvements in disc brakes.

(Prior Art) In a disc brake, a carrier 2 is fixed to a non-rotating member of a vehicle on one side of a disc 1, as shown in FIGS. 4 and 5.
A pair of friction pads 3 and 4 placed across the disc 1 are held slidably in the axial direction of the disc 1, and a caliper 5 is slidably held. There is one in which a cylinder portion 7 facing the piston 6 is fitted, a bridge portion 8 spanning the disk 1, and a leg portion 9 facing the back side of the other friction pad 4 are formed.
The operation of this device involves relatively displacing the piston 6 and caliper 5 using pressure oil supplied into the cylinder section 7 to move the friction pad 3 on the piston 6 side to the disk 1.
At the same time, the reaction force displaces the caliper 5 with respect to the piston 6, and the other friction pad 4 is brought into contact with the disc 1 with its leg 9, thereby braking the rotation of the disc 1. It's becoming like that.

By the way, in this type of disc brake, in order to prevent the friction pads 3 and 4 from dragging against the disc 1 (the friction pads being maintained in contact with the disc), the caliper 5 is
In the space 10 between the bridge portion 8 and the friction pads 3, 4, a drag prevention spring material 11 biases the friction pads 3, 4 in a direction to separate them from each other.
Two (one not shown) are provided symmetrically.
Each of the drag prevention spring members 11 has a plurality of curved portions 11a whose curved directions are sequentially changed. Both ends of each are connected to respective friction pads 3 and 4. In the case of the above disc brake, the spring material 1
1 is located between the disk 1 and the bridge part 8 of the caliper 5, so the disk 1 and the caliper 5
The outer periphery of the disk 1 and the bridge part 8 of the caliper 5 are connected to prevent interference between the bridge part 8 and the spring material 11.
The distance A between the inner surface and the inner surface is made sufficiently large.

(Problems to be solved by the invention) However, since the disc brake is arranged in a limited space in a vehicle, the thickness B of the bridge portion 8 of the caliper 5 is made thinner by the amount that the distance A is increased. Therefore, the rigidity of the bridge portion 8 of the caliper 5 was supposed to be reduced. Therefore, in extreme cases, the caliper 5
There was a risk that the bridge portion 8 of the structure would be damaged, which was not preferable in terms of strength.

The present invention is intended to solve the above problems, and its purpose is to ensure the strength of the caliper.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a pair of friction pads 3, which are disposed opposite to each other with the disk 1 in between and are displaceably movable toward the disk 1. 4, a caliper 5 having a bridge portion 8 spanning the pair of friction pads 3, 4 and the disk 1 and pressing the pair of friction pads 3, 4 toward the disk 1; an opening 1 facing the circumferential center of the circumferential surface of the pair of friction pads 3, 4 formed and facing the bridge portion 8;
2, and a spring member 13 which is connected to the pair of friction pads 3 and 4 and whose curved portion 17 applies a spring force to the pair of friction pads 3 and 4 in the direction of separating them from each other.
In the disc brake, the spring material 13 is one piece, and the pair of friction pads 3,
Fitting holes 18 and 18 are respectively provided in the range corresponding to the opening 12 of the caliper 5 on the circumferential surface of the spring member 4, and the insertion parts (ends) 14 and 15 of the spring material 13 are inserted into the fitting holes 18 and 18. The spring material 13 is disposed such that the curved portion 17 of the spring material 13 faces the opening 12, and at least one insertion portion 14 of the spring material 13 and the curved portion 17 are arranged.
between the inner surface of the bridge portion 8 and the friction pad 4.
A retaining portion 16 is formed to prevent the insertion portions 14, 15 of the spring member 13 from coming out of the fitting holes 18, 18, located in the gap between the spring member 13 and the circumferential surface of the spring member 13.

(Function) With the above-described configuration, the curved portion 17 of the spring material 13 faces the opening 12, so that the bridge portion 8 of the caliper 5 is bent by a sufficient distance between the outer periphery of the disk 1 and the inner surface of the bridge portion 8 of the caliper 5. Even if the thickness of the spring material 13 is not reduced, the spring material 13 will not interfere with the bridge portion 8 of the disk 1 and caliper 5.

Also, one spring material 13 is attached to the opening 1 of the caliper 5.
Since the friction pads 3 and 4 are connected to each other within the range corresponding to 2, even one spring member 13 can space the friction pads 3 and 4 almost equally from the disk 1. This is based on the fact that it is difficult to manufacture a plurality of spring materials having exactly the same spring force.

Furthermore, since the retaining portion 16 is formed in the gap between the inner surface of the bridge portion 8 and the circumferential surface of the friction pad 4, the insertion portions 14 and 15 of the spring material 13 will come out of the insertion holes 18 and 18 due to vibration etc. Never.

(Effect of the invention) As described above, the present invention eliminates the need to reduce the thickness of the bridge part 8 of the caliper 5 by ensuring a sufficient distance between the outer periphery of the disk 1 and the inner surface of the bridge part 8 of the caliper 5. Therefore, the rigidity of the bridge portion 8 of the caliper 5 is not reduced, and the strength of the caliper 5 can be ensured sufficiently.

Furthermore, since the pair of friction pads 3, 4 are spaced evenly from each other with respect to the disk 1, uneven wear of the pair of friction pads 3, 4 can be prevented as much as possible.

(Example) Hereinafter, an example of the present invention will be described based on the drawings, and the same components as those of the above-mentioned conventional technology will be given the same reference numerals and the explanation thereof will be omitted.

The bridge portion 8 of the caliper 5 is provided with an opening 12 for checking the degree of friction between the friction pads 3 and 4. The opening 12 extends in the axial direction of the disk 1 .

A drag prevention spring member 13 is connected to the pair of friction pads 3, 4 so as to bias the pair of friction pads 3, 4 in a direction to separate them. This spring material 13 is made of wire, and has a pair of insertion parts 14 and 15, a retaining part 16,
It is composed of a curved portion 17.

The pair of insertion parts 14, 15 are formed by both ends of the spring material 13, and the pair of insertion parts 14, 15 are connected to the back metals 3a, 4a of the pair of friction pads 3, 4, respectively. That is,
Around the caliper 5 facing the bridge part 8,
At the circumferential center of the circumferential surface, the fitting holes 18, 1
A pair of insertion portions 14 and 15 are inserted into each of the insertion holes 18 and 18, respectively.

The retaining portion 16 is bent toward the friction pads 3 and 4 and extends from the insertion portion 14 in the axial direction of the disk 1. The displacement movement in the direction of coming out of the insertion hole 18 is restricted.

The curved portion 17 is connected to the retaining portion 16 and the insertion portion 1.
5, and the curved portion 17 is located between the opening 1
It is coming within 2. In this embodiment, one curved portion 17 is provided in the spring material 13, and this curved portion 17 mainly provides the spring material 13 with elasticity that can be expanded and contracted.

Therefore, by assembling the spring material 13, the curved portion 17 of the spring material 13 faces into the opening 12, and interference between the bridge portion 8 of the disk 1 and the caliper 5 and the spring material 13 is prevented. Therefore, a sufficient distance A is provided between the outer periphery of the disk 1 and the inner surface of the bridge portion 8 of the caliper 5, and the bridge portion 8 is
There is no need to reduce the thickness B. For this reason,
The rigidity of the bridge portion 8 of the caliper 5 does not decrease, and the strength of the caliper 5 can be ensured sufficiently.

Moreover, one spring material 13 connects the circumferential center of the circumferential surfaces of both friction pads 3 and 4 facing the bridge portion 8, and compared to the case where a plurality of spring materials are used, both friction pads 3 and 4 are connected to each other. , 4 are equally spaced with respect to disk 1.

Furthermore, in this embodiment, the bent portions of the spring material 13, that is, the insertion portion 14 and the retaining portion 16
The bent part between the spring material 13 and the bent part between the retaining part 16 and the curved part 17 and the curved part 17 are all
It is bent in the direction of expansion and contraction, and each bent part has spring properties in the same direction. Therefore, the spring material 13 is not damaged at each bending portion due to the expansion and contraction movement of the spring material 13, and the durability of the spring material 13 is improved. Accordingly, the disc brake operation can be maintained normally for a long period of time.

Furthermore, in this embodiment, the insertion hole 1
8 and 18, and assemble the caliper 5 to the carrier 2, the retaining portion 1
6 is restricted by the inner surface of the bridge portion 8 of the caliper 5, so that the spring material 13 does not come off from the back metals 3a, 4a of the friction pads 3, 4.
Therefore, it becomes extremely easy to assemble the spring material 13, and workability can be improved.

FIG. 3 shows another embodiment, in which the same components as those in the embodiment and the prior art are given the same reference numerals and their explanations will be omitted.

In this embodiment, the spring material 13 is a leaf spring, and by doing so, it is possible to obtain a larger spring force than the spring material 13 according to the previous embodiment, and also to provide a pair of springs against the disk 1. The friction pads 3, 4 can be evenly spaced apart.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a disc brake according to the present invention, FIG. 2 is a longitudinal sectional view showing the disc brake according to the present invention, FIG. 3 is a plan view showing a disc brake according to another embodiment, and FIG. The figure is a partially sectional plan view showing a disc brake according to conventional technology.
FIG. 5 is a partially sectional front view of FIG. 4. 1... Disc, 3, 4... Friction pad, 5...
...Caliper, 8...Bridge part, 12...Opening,
13... Spring material, 14, 15... Insertion part (end part), 16... Retaining part, 17... Curved part, 1
8...Insertion hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of friction pads that are disposed opposite to each other with a disk in between and are displaceable toward the disk, and a bridge portion that straddles the pair of friction pads and the disk. a caliper that presses the pads toward the disk; an opening formed in a bridge portion of the caliper and facing the circumferential center of the circumferential surface of the pair of friction pads facing the bridge portion; and connected to the pair of friction pads. a spring material whose curved portion applies a spring force in a direction to separate the pair of friction pads from each other; A fitting hole is provided in a range corresponding to the opening, and both ends of the spring material are inserted into the fitting hole, and the spring material is arranged so that the curved part of the spring material faces the opening,
A hole is provided between at least one end of the spring material and the curved portion, and is located in the gap between the inner surface of the bridge portion and the circumferential surface of the friction pad to prevent the end of the spring material from coming out of the fitting hole. A disc brake characterized by forming a stop portion.