JPH017862Y2 - - Google Patents

Description

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

(Prior Art) In general, a disc brake includes a carrier fixed to a non-rotating member of a vehicle on one side of the disc and having legs spaced apart in a circumferential direction of the disc;
A friction pad supported by the carrier so as to be slidable in the axial direction of the disk between both legs of the carrier, a caliper support pin fitted to the carrier so as to be movable forward and backward in the axial direction of the disk, and the caliper support pin. a caliper that is fixedly held and presses the friction pad according to the forward and backward movement of the caliper support pin; a pin boot that protrudes from the carrier and includes the caliper support pin; and a part that presses the friction pad against the carrier. It is equipped with a despring. However, in this type of disc brake, the friction pads are recently made of metal in order to avoid using harmful substances such as asbestos in the manufacture of the friction pads, and when braking, the friction pads and the disc are made of metal. If they came into contact with each other too much, they would emit sparks, which could burn out the pin boots. Furthermore, when the vehicle is running, there is a risk that stones or the like will directly collide with the pin boots, causing damage to the pin boots. Therefore, if the pin boots are burnt out or damaged,
Dust, etc. may enter the pin boots from the damaged area,
This was causing trouble in the forward and backward movement of the caliper support pin. Therefore, conventionally, a protector was screwed to the carrier, and the protector surrounded the pin boot to protect the pin boot from sparks, stones, and the like.

However, since the protector is an independent component and must be screwed together, assembly work becomes troublesome.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems, and its purpose is to provide a disc brake that protects the pin boot and facilitates assembly work.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pair of disks fixed to a non-rotating member of the vehicle on one side of the disk and spaced apart in the circumferential direction of the disk. a carrier having legs; a friction pad supported by the carrier between its legs so as to be slidable in the axial direction of the disk; a caliper that presses the friction pad toward the disk; a caliper support pin whose one end side is slidably fitted into one of the carriers and whose other end side is fixedly held to the other side of the carrier or the caliper, and a pin boot that protrudes from the carrier and includes the caliper support pin;
A pad spring that presses the friction pad against the carrier, and the pad spring includes a base that is in close contact with a portion of the inner wall of the leg that supports the friction pad, and a pad spring that extends from the base and presses the friction pad. a pressing part that presses the carrier against the carrier;
A protector portion extends from the base portion and surrounds the pin boot.

(Function) With the above configuration, the pad spring is equipped with a protector part, and by simply assembling the pad spring without screwing an independent protector, the protector part of the pad spring protects the pin boot from sparks. This will protect it from stones etc.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 to 3, reference numeral 1 denotes a carrier fixed to a non-rotating member (not shown) of the vehicle, and the carrier 1 has legs 1a, 1a spaced apart in the circumferential direction of the disk 2. and each leg 1a, 1
a includes inner walls 3, 3 facing each other, step portions 4, 4 formed at the lower ends of each of the inner walls 3, 3 and extending in the axial direction of the disk 2, and disks provided at the upper ends of the legs 1a, 1a. The connecting portions 5, 5 extend in the two axial directions. A pair of friction pads 7, 7 are slidably supported on the stepped portions 4, 4 via pad springs 6, 6 (described later) attached to the inside of each leg portion 1a, 1a. The friction pads 7, 7 face each other with the disk 2 in between. Bores 8, 8 are bored in the connecting parts 5, 5, and one end side of a caliper support pin 9, 9 is slidably fitted into each of the bores 8, 8. The other ends of the caliper support pins 9, 9 protrude beyond the bores 8, 8, and a threaded portion is formed on the outer periphery of the tips of the other ends. This threaded portion has a smaller diameter than the other components of the caliper support pin 9, and the caliper 10 is fitted into each threaded portion, and a nut 9 is inserted into each threaded portion.
By screwing a and 9a together, the caliper 10 is fixedly held on the caliper support pins 9, 9. The caliper 10 includes a cylinder portion 10a, a bridge portion 10b extending from the cylinder portion 10a over the pair of friction pads 7, 7 and the disk 2, and the bridge portion 10a.
The caliper 10 has a leg portion 10c provided at the tip end of the caliper 10, and the caliper 10 operates by operating a piston fitted into the cylinder portion 10a by pressure oil supplied into the cylinder portion 10a. One of the friction pads 7 is pressed against the disk 2, and the reaction force pushes the caliper 10, and the caliper support pins 9, 9 push the bore 8,
The other friction pad 7 is pressed against the disk 2 by the leg portion 10c of the caliper 10. This results in
Braking force will work.

The carrier support pins 9, 9 have pin boots 11, 1 whose protruding parts from the carrier 1 are made of rubber or the like.
1 (one not shown), and one end side of the pin boots 11, 11 is enclosed by each leg portion 1a, 1
It is fixed to the periphery of the bores 8, 8 at a, and the other end side is held between nuts 9a, 9a and a caliper 10.

The pad spring 6 is generally composed of a base portion 12, a retaining portion 13, a pressing portion 14, and a protector portion 15. The base 12 includes a pair of legs 12a, 12a, and a pair of legs 12a, 12a.
It consists of a bridge part 12b that connects the legs at their upper ends, and bent parts 12c, 12c where the lower ends of the pair of legs 12a, 12a are bent.
a, 12a and the bridge portion 12b are in contact with the inner wall 3 of the carrier 1, and each bent portion 12c, 12c
is brought into contact with the step portion 4. At this time, the bridge portion 12b straddles the disk 2. Further, the pair of leg portions 12a, 12a and each of the bent portions 12
Claw portions 12d, 12d, 12e,
12e is formed, the claw parts 12d, 12d function as a stopper for preventing the friction pads 7, 7 from falling off, and the claw parts 12e, 12e are formed on the base 12.
position with respect to carrier 1.

The retaining portion 13 extends from the lower end of the bridge portion 12b constituting the base portion 12 to the bent portions 12c, 12.
The retaining portion 13 extends obliquely downward on the opposite side to the bending direction of c, and since each bent portion 12c, 12c of the base portion 12 is in contact with the stepped portion 4, the retaining portion 13 is connected. It is engaged with the side surface of part 5 with elastic force. Therefore, as a result of this, the pad spring 6 is reliably attached to the carrier 1, and the pad spring 6 will not come off upward in FIG. The pressing part 14 is a connecting part 1 that generates a spring force.
It is connected to the base 12 via 6. Connecting part 1
6, one end side is connected to the caliper 10 from the upper end of the base 12.
The other end side changes direction midway and curves toward the friction pad 7 side. A pressing portion 14 is connected to the other end of this connecting portion 16, and this pressing portion 14 has a length sufficient to simultaneously contact the pair of friction pads 7, 7. That is, the pressing part 14 is
It is a long member with a substantially semicircular cross section, and each bent portion 12
The friction pads 7, 7 placed on the surfaces c, 12c are pressed from above by the pressing portion 14. This results in
The friction pads 7, 7 are slidably supported on the carrier 1.

The protector part 15 is curved from the upper end of the base part 12 toward the side opposite to the pressing part 14,
Its tip extends downward. Therefore, the protector portion 15 surrounds the outside of the pin boot 11.

Therefore, in such a disc brake, even if a stone or the like flies during driving, the stone or the like will hit the protector portion 15 and the pin boot 11 will not be damaged. Further, even if sparks are generated due to the contact between the disk 2 and the friction pads 7, 7 made of metal or semi-metallic, the sparks are prevented by the protector portion 15, so the pin boots 11 will no longer burn out. In this way, by simply assembling the pad spring 6, the disc brake can have the protective function of the pin boot 11.

Although one embodiment has been described above, the present invention also includes the following.

A plurality of connecting portions 16 are provided, and the plurality of connecting portions 1
6 may connect the base portion 12 and the pressing portion 14.

The protector portion 15 may be provided only on the pad spring 6 on the rotational direction side of the disk 2.

The caliper support pins 9, 9 may have one end fixedly held on the carrier 1 and the other end slidably fitted into the caliper 10.

(Effects of the invention) As described above, this invention reduces the number of parts by providing a protector part on the pad spring and protecting the pin boot from sparks, stones, etc. by simply assembling the pad spring. At the same time, the assembly work can be made extremely easy.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a disc brake equipped with a pad spring according to the present invention, Fig. 2 is a partial vertical sectional view of Fig. 1, and Fig. 3 is a pad spring according to the present invention. FIG. 1... Carrier, 1a... Leg, 2... Disc, 6... Pad spring, 7... Friction pad, 9... Caliper support pin, 10... Caliper, 11... Pin boot, 12... Base , 13...
...Preventing part, 14, 14... Pressing part, 15...
protector part.

Claims (1)

[Claims for Utility Model Registration] A carrier having a pair of legs fixed to a non-rotating member of a vehicle on one side of the disk and spaced apart in the circumferential direction of the disk; A friction pad slidably supported in the axial direction of the disk, a caliper that presses the friction pad toward the disk, one end of which is slidably fitted to either the carrier or the caliper, and the like. a caliper support pin whose end side is fixedly held on the other side of the carrier or the caliper; a pin boot that protrudes from the carrier or the caliper and includes the caliper support pin; and a pad spring that presses the friction pad against the carrier. The pad spring includes a base portion that is in close contact with a portion of the inner wall of the leg portion that supports the friction pad;
A disc brake comprising: a pressing portion extending from the base portion and pressing the friction pad against the carrier; and a protector portion extending from the base portion and surrounding the pin boot.