JPH027301Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a disc brake.

[Prior art]

As shown in FIG. 4, a conventional disc brake includes a pair of arms that are attached to a non-rotating part of a vehicle and extend from one side of the disc 1 to the other side across the outer periphery at intervals in the rotational direction of the disc 1. 2 and 3, the said disk 1 is
A caliper 5 having legs facing each other on both sides of the disk 1 is slidably attached so as to straddle the outer periphery of the disk 1.
A pad guide portion is provided on the mutually opposing wall surfaces of the pair of arms 2 and 3 of the carrier 4, and a pair of pads 6 and 7 located on both sides of the disk 1 can freely slide on the pad guide portion in the axial direction of the disk 1. a pad spring 8 supported between the pair of pads 6, 7 and the carrier 4, which presses the pair of pads 6, 7 against the carrier 4;
9, one pad 6 is connected to the disk 1 by a piston provided on one leg of the caliper 5 and operated by receiving hydraulic pressure from a master cylinder.
The pad 7 is brought into pressure contact with one side of the disk 1, and the reaction force generated at this time causes the other pad 7 to come into pressure contact with the other side of the disk 1 via the other leg of the caliper 5, thereby braking the rotating disk 1. So,
Vibration of the pads 6, 7 is prevented by the pressing action of the pad springs 8, 9, and a wear sensor 10 is attached to the side surface of the inner pad 6, and when the pad 6 wears a predetermined amount, the wear sensor 10
It is known that the tip of the pad comes into contact with the disk 1 and makes an abnormal noise to notify wear of the pad.

By the way, when such a disc brake is attached to a vehicle, a disc brake that is attached to the right side of the vehicle and a disc brake that is attached to the left side of the vehicle are configured to have opposite left and right sides. Therefore, in conventional disc brakes, if the pad provided on the side surface where the wear sensor 10 corresponds to the disc exit side is incorrectly assembled, the warning sound from the wear sensor 10 becomes low and the warning function is not fully activated. It also had the drawbacks of being unable to perform the desired function and having poor durability.

Therefore, in order to prevent such incorrect assembly, if the inner pad 6, on which the wear sensor is installed on the side surface corresponding to the disk outlet side, is attempted to be incorrectly assembled, the wear sensor 10 is attached to the pad spring at 9. A method of providing a part (regulating part) 9a that interferes with the disk has been considered, but if this method is used, not only will the material for the pad spring 9 increase, making it expensive, but also the amount of material required for the pad spring 9 will increase. Different pad springs had to be used for different parts, which was a management problem.

[Problem that the invention attempts to solve]

The problem to be solved by this invention is to make it possible to prevent incorrect assembly of a pad equipped with a wear sensor on the side corresponding to the disk exit side by only making slight changes to the existing parts. At the point.

[Means for solving problems]

A caliper is slidably provided on a carrier attached to a non-rotating part of the vehicle, and a pair of pads located on both sides of the disc are supported on the carrier so as to be slidable in the axial direction of the disc, and wear is applied to the side surfaces of the pads. In a disc brake having a sensor, a restriction part is provided on a portion of the caliper or the carrier located on the disc exit side, which prevents the pad having the wear sensor on the side surface corresponding to the disc exit side from being attached to the carrier; It has been formed.

[Effect]

If an attempt is made to erroneously assemble a pad having a wear sensor on the side surface corresponding to the disk exit side, the wear sensor will come into contact with the regulating portion, making it impossible to mount this pad on the carrier.

[Effect of idea]

By only making slight changes to the currently used parts, it is possible to easily and inexpensively prevent incorrect assembly of the pad provided with the wear sensor on the side surface corresponding to the disk exit side.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 11 in FIGS. 2 and 3 is a carrier attached to a non-rotating part of the vehicle, and a disk 12 is attached to both ends of the carrier 11 spaced apart in the rotational direction of the disk 12.
A pair of arms 13 and 14 are provided that extend from one side of the disk 12 to the other side of the disk 12 across the outer periphery of the disk 12 . These arms 13,1
A groove (not shown) through which the disk 12 passes is formed in the middle lower part of each of the disks 4 .

The carrier 11 also includes both arms 13 and 14.
Pad guide portions (not shown) are formed on mutually opposing wall surfaces of the pads, and these pad guide portions allow a pair of pads 15 and 16 disposed on both sides of the disk 12 to slide freely in the axial direction of the disk 12. Supported.

The pair of arms 13 and 14 also include one leg 17 provided on one side of the disk 12 and a leg extending from the one leg 17 to the other side of the disk 12 across the outer periphery of the disk 12. A caliper 19 having the other leg portion 18 is slidably attached via a slide pin 20. One leg 17 of the caliper 19 is provided with a piston (not shown) that moves in the direction of arrow A in FIG. 2 in response to hydraulic pressure from a master cylinder (not shown). One pad 15 is brought into contact with the end of the piston, and the other pad 16 is brought into contact with the other leg 18 of the caliper 19.

As shown in FIGS. 2 and 3, a wear sensor 21 is attached to a side surface 15a corresponding to the disk inlet side of the inner pad 15 of the pair of pads 15, 16, that is, one of the pads 15 that comes into contact with the piston. There is. This wear sensor 21 is approximately U
Consists of a letter-shaped plate member, the tip of which is connected to the disk 12.
are opposed to each other, and the tip is spaced apart from the disk 12 by a predetermined distance when the assembly is completed.

On the other hand, on one leg 17 of the caliper 19, there is a pad located on a side surface 15b opposite to one pad (inner pad) 15 and corresponding to the disk exit side of this one pad 15, as shown in FIG. A projection (regulating portion) 22 is provided as shown in FIG. If the wear sensor 21 attempts to erroneously assemble the pad attached to the side surface 15b corresponding to the disk exit side of the pad 15, the protrusion 22 will come into contact with the wear sensor 21, causing the carrier 1
1 so that the pad 15 cannot be attached to it.

In addition, between the arm 13 and the pair of pads 15, 16 and between the arm 14 and the pair of pads 15, 16, a pair of pads 15, 16 are respectively pressed against the carrier 11 to prevent these vibrations. Pad springs 23 and 24 are interposed.

When the piston of the caliper 19 moves in the direction of arrow A in FIG.
5 comes into pressure contact with one side of the disk 12 rotating together with the wheel, and the reaction force generated at this time moves the caliper 19 in the direction of arrow B in FIG. is brought into pressure contact with the other side surface of the rotating disk 12, thereby braking the rotating disk 12. When the pad 15 wears down to a predetermined amount, the tip of the wear sensor 21 comes into contact with the disk 12 and makes an abnormal noise, giving an alarm that the pad 15 has worn out.

By the way, when assembling this disc brake, if you try to erroneously assemble a pad that has a wear sensor 21 on the side surface 15b corresponding to the disc outlet side of one pad (inner pad) 15, the wear sensor 21 may This pad is attached to the carrier 11 in order to contact the protrusion 22 of the carrier 19.
cannot be installed on the Therefore, it is possible to prevent incorrect assembly of the pad in which the wear sensor 21 is provided on the side surface 15b corresponding to the disk exit side of the pad, to ensure that the wear sensor 21 emits an alarm sound, and to improve durability. Deterioration can be prevented.

In the above embodiment, the caliper 19 was provided with the protrusion 22 to prevent incorrect assembly.
Without being limited thereto, such a protrusion may be provided on the pad spring 24 or may be provided on the carrier 11.

In addition, in the caliper 19, the bleeder part 25 and the piping part 26 are on opposite sides for right and left use, and these are managed at the time of assembly, so the inner pad 15 with the wear sensor 21 attached These pads can be managed without increasing the management process related to incorrect assembly.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a partial front view, Figure 2 being a plan view,
3 is a view taken along the arrow in FIG. 2, and FIG. 4 is a plan view of a conventional disc brake. 11...Carrier, 12...Disk, 13,
14... Arm, 15, 16... Padded, 17...
...One leg, 18...The other leg, 19...Caliper, 21...Wear sensor, 22...Protrusion (regulating part).

Claims (1)

[Scope of utility model registration request] A carrier having a pair of arms attached to a non-rotating part of the vehicle and extending from one side of the disk to the other side at intervals in the rotational direction of the disk, straddling the outer circumference of the disk, A caliper having legs facing each other on both sides is slidably attached, and a pair of pads located on both sides of the disk are slidably supported in the axial direction of the disk between the pair of arms,
In the disc brake having a wear sensor on the side surface of the pad, it is impossible to mount the pad, the pad having the wear sensor on the side surface corresponding to the disk exit side, on a portion of the caliper or carrier located on the disk exit side. A disc brake characterized by forming a regulating part.