JPH0244110Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disc brake for a vehicle that supports a caliper via a sliding pin.

[Conventional technology]

For example, in the disc brake disclosed in Japanese Utility Model Publication No. 53-35651, a caliper equipped with a pair of friction pads that pinches a disc that rotates together with the wheel is connected to a bracket fixed to the vehicle body via a sliding pin and attached to the disc shaft. The friction pad is supported so as to be movable in the direction, and a wear indicator of the friction pad is formed on the bracket and the caliper or a part connected thereto, and the friction pad is determined by the amount of movement of the caliper that moves relative to the bracket in proportion to the amount of wear of the friction pad. The amount of wear is displayed.

[Problem that the invention attempts to solve]

However, in the above structure, there is a hole for sliding between the sliding pin and the sliding pin insertion part of the bracket.
Due to the gap formed in the slide pin, if it is installed on a vehicle that travels on rough terrain such as a buggy, the sliding pin may be struck by the vibration of the caliper, causing abnormal wear on the sliding pin. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a disc brake for a vehicle that can prevent vibration of the caliper and also display the amount of wear on the friction pads.

[Means for solving problems]

In order to achieve the above object, the present invention provides a disc brake in which a caliper is movably supported in the axial direction of the disc via a sliding pin on a bracket fixed to a vehicle body, in which the caliper is mounted on either the bracket or the caliper. A damper member is fixedly provided to bias the slide pin in a direction perpendicular to the axial direction of the sliding pin, and a pointer is provided on the damper member to display the amount of movement of the caliper that moves as the friction pad wears. It is characterized in that an indicator portion corresponding to the pointer is formed on the caliper or the bracket.

[Effect]

As a result, the vibration of the caliper is buffered by the damper member, preventing the sliding pin from being struck, and the amount of movement of the caliper can be visually observed using the pointer and indicator, and the amount of wear on the friction pad can be confirmed. can.

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

1 to 4 show a first embodiment of the present invention, in which a disc brake 1 is configured such that a caliper 4 is connected to a bracket 2 fixed to a vehicle body through sliding pins 3, 3 in the axial direction of a disc 5. It supports movability.

The caliper 4 has an action part 4a and a reaction part 4b.
and a bridge portion 4c connecting the disks 5 by straddling the outer periphery thereof, and supporting arms 4d, 4d.
Sliding pins 3, 3 screwed into the brackets 2, respectively, are inserted into the sliding pin insertion holes 2a of the bracket 2, and a pair of friction pads 6, 6, which are arranged opposite to each other with the disk 5 in between, are connected to the disk by the hanger pin 7. It is suspended so that it can move in the axial direction.

Further, a cylinder 4e is formed in the action portion 4a, a piston 8 is fitted in the cylinder 4e in a liquid-tight and movable manner, and a hydraulic chamber 9 is provided between the bottom of the cylinder 4e and the rear end of the piston 8. is defined, and one end is connected to the piston 8 in the hydraulic pressure chamber 9.
A push rod 10 is disposed, the other end of which extends through the bottom of the hydraulic pressure chamber 9 in a fluid-tight manner.

Further, a parking brake mechanical actuation mechanism 11 is provided outside the bottom of the cylinder 4e. This actuation mechanism 11 includes a housing 13 which is connected to the outside of the action part 4a by screws 12, 12.
, a cast-in nut 14 cast into the housing 13 , a threaded rod 15 that is threaded into the cast-in nut 14 with a multi-start thread, an operating lever 16 fixed to the outer end of the threaded rod 15 , and a threaded rod 15 The screw rod 15 and the adjusting bolt 17 are screwed into each other and have their tips abutted against the other end of the push rod 10. When the operating lever 16 is rotated, the threaded rod 15 and the adjusting bolt 17 are rotated. The push rod 10 is pushed to move the piston 8 forward in the direction of the disk 5 to perform a braking action.

Further, a damper spring 18 attached to the bracket 2 is in contact with the upper center of the bridge portion 4c of the caliper 4, and the caliper 4 is moved as shown in FIGS.
In the figure, it is pressed downward, that is, in a direction perpendicular to the axes of the sliding pins 3, 3.

As shown in FIG. 4, the damper spring 18 is bent into a U-shape from the base 18a with the bracket 2 held between three mounting claws 18b, 18c, and 18d formed on the base 18a. The pressing part 18f at the tip of the extending elastic part 18e is attached by contacting the bridge part 4c of the caliper 4, so that the caliper 4 can slide the sliding pin 3 fixed to the support arm 4d on the bracket 2. It is elastically supported on the lower surface of the pin insertion hole 2a.

Therefore, even if the caliper 4 attempts to vibrate due to its own weight, the elastic portion 18e of the damper spring 18 buffers and prevents the vibration, and the sliding pins 3, 3 are inserted into the sliding pin insertion holes 2a, 2 of the bracket 2.
Since the sliding pins 3, 3 are no longer struck within a, and the sliding pins 3, 3 are uniformly pressed, the sliding pins 3, 3
The caliper 4 can be smoothly moved.

The damper spring 18 also has a base 18a.
A pointer 18g extends from both sides of the mounting claw 18b toward the reaction part 4b substantially parallel to the upper surface of the bridge part 4c of the caliper 4, and is bent 90 degrees in the circumferential direction of the disk 5 to form an arrow part at the tip. , 18g, and on the other hand, the reaction part 4 of the caliper 4
Indicator portions 4f, 4f facing the hands 18g, 18g are formed on the upper surface of b.

As a result, when the friction pads 6, 6 are worn out due to repeated braking operations, the caliper 4 moves toward the action section 4a in proportion to the amount of wear. Since the index parts 4f, 4f are closer to the bracket 2 than the initial setting position of 4f, by visually observing this,
The amount of wear of the friction pads 6, 6 can be confirmed. For example, if the indicator parts 4f, 4f move to the position of the end surface on the side of the reaction part 4b of the bracket 2, the friction pads 6, 6 have reached the wear limit. It can be seen that it has been achieved.

FIG. 5 also shows a second pointer 18h, 18h extending from the pressing portion 18f of the damper spring 18.
FIG. 6 shows an example, and FIG.
Mounting claws 18i, 18i from 8a to bracket 2
This shows a third embodiment of the present invention in which the pointer 18j is extended in the direction of the reaction part 4b of the caliper 4 from between the mounting claws 18i, 18i.
It operates in the same manner as the first embodiment.

7 and 8 show a fourth embodiment of the present invention, in which the damper spring 20 has three mounting claws 20b, 20c, 20d formed on the base 20a.
The bracket 2 is held by the caliper 4, and the pressing portion 20f at the tip of the elastic portion 20e extending from the base portion 20a toward the reaction portion 4b and bent into a U-shape is pressed against the caliper 4.
It is attached in contact with the bridge part 4c of
Furthermore, from both sides of the mounting claw 20b of the base 20a,
Two arms 20g, 20g extending in the direction of the acting part 4a substantially parallel to the upper surface of the bridge part 4c of the caliper 4
Pointers 20h, 20h are formed on the side of the tip, respectively.

As a result, when the friction pads 6, 6 are worn out due to repeated braking operations, the caliper 4 moves toward the acting portion 4a in proportion to the amount of wear, so that the pointer 20h shown in FIG. As the end 4g on the side of the action part 4a approaches, the amount of wear on the friction pads 6, 6 can be confirmed by visually observing this. For example, when the end 4g approaches the pointer 20
When moved to position h, it can be visually confirmed that the friction pads 6, 6 have reached their wear limit.

In each of the above embodiments, the damper spring is fixedly attached to the bracket, but the same result can be obtained even if the damper spring is fixedly attached to the caliper, a pointer is provided on the damper spring, and an index portion is formed on the bracket. be effective.

[Effect of idea]

As described above, the present invention provides a disc brake in which a caliper is supported via a sliding pin on a bracket fixed to a vehicle body, in which the caliper is mounted on either the bracket or the caliper in the axial direction of the sliding pin. A damper member that is biased in an orthogonal direction is fixedly provided, and a pointer is provided on the damper member to display the amount of movement of the caliper that moves as the friction pad wears, and on the other hand, the caliper or the bracket corresponds to the pointer. Since the damper spring buffers the vibration of the caliper, the sliding pin will not be struck by the vibration of the caliper, and the occurrence of abnormal wear of the sliding pin can be prevented. The amount of wear on the friction pad can be determined from the amount of relative movement of the indicator.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a plan view of the disc brake, FIG. 2 is a front view, FIG. 3 is a cross-sectional view taken from FIG.
4 is a perspective view of a damper spring, FIG. 5 is a perspective view of a damper spring showing a second embodiment of the present invention, FIG. 6 is a perspective view of a damper spring showing a third embodiment of the present invention, and FIG. The figure is a partial sectional view of a disc brake showing a fourth embodiment of the present invention, and FIG. 8 is a perspective view of a damper spring. 1... Disc brake, 2... Bracket,
3... Sliding pin, 4... Caliper, 4f... Index portion, 6... Friction pad, 18, 20... Damper spring, 18g, 18h, 18j, 20h...
Guidelines.

Claims (1)

[Scope of utility model registration request] In a vehicle disc brake in which a caliper is movably supported in the axial direction of the disc via a sliding pin on a bracket fixed to the vehicle body, the caliper is supported on either the bracket or the caliper in the axial direction of the sliding pin. A damper member is fixedly provided to bias the damper member in a direction perpendicular to the damper member, and a pointer is provided on the damper member to display the amount of movement of the caliper that moves as the friction pad wears. A disc brake for a vehicle, characterized in that a corresponding index portion is formed.