JPH018744Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a disc brake formed to prevent the so-called rattle phenomenon, in which the caliper and the padded back plate repeatedly collide intermittently and emit a metallic sound due to the vibration of the caliper when not braking. This invention relates to a rattle prevention device.

A caliper in a disc brake is held on an anchor plate by two retainers and is formed to slide on a rail portion during braking. In addition, the pad back plate is held by engaging the caliper on both sides, and is pressed by a piston that slides inside a cylinder formed in the caliper to release the pad as a wear material fixed to the pad back plate. The pad is brought into contact with the rotating rotor, and at the same time, the end wall of the caliper, which moves due to the reaction force of the piston's pressing force, pushes the other pad back plate, so that the rotor is sandwiched between just two pads and a braking force is generated. It is formed. In this case, the caliper and the pad back plate are only engaged by loosely fitting the engagement protrusion provided on the pad back plate into the guide groove formed on the caliper, so the caliper is engaged with the pad back plate while the vehicle is running. There are problems in that the caliper vibrates and intermittently collides with the pad back plate, producing a metallic sound and increasing wear on the engagement portion between the caliper and the pad back plate.

This invention solves the above-mentioned problems by providing a clip with a spring function at the engagement part between the caliper and the pad back plate, which is designed to absorb the loose fit between the caliper and the pad back plate. The purpose is to provide a preventive device.

This invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a partially cutaway sectional view of a conventional disc brake, and FIG. 2 is a right side view of FIG. 1. In the figure, 1 is a caliper, 2 is an anchor plate, 3 is a retainer, 4 is a rail part,
5 is a cylinder, 6 is a piston, 7 is a pad back plate, 8 is a pad, 9 is a rotor, and 10 is an end wall portion of the caliper 1. The pad back plate 7 is held by engagement protrusions 12 formed on both sides of the pad back plate 7 loosely engaged with guide grooves 11 that are open on both side end surfaces of the caliper 1.

Therefore, in this invention, Figures 3 and 4 are
As shown in the figure, a clip 13 formed by bending a steel wire is provided, and the clip 13 is attached to the pad back plate 7.
and engages with the guide groove 11 formed in the caliper 1,
It is formed so as to absorb the play that exists between the caliper 1 and the pad back plate 7.

As shown in FIGS. 5, 6, and 7, the clip 13 includes a pair of opposing hook-shaped hook portions 14, a linear body portion 15 connecting the hook portions 14, and a straight body portion 15 that connects the hook portions 14. A separating portion 16 protrudes from approximately the middle of the main body portion 15 in a lateral direction substantially perpendicular to the main body portion 15 on the same plane as the main body portion 15, and is connected to the separating portion 16.
A locking part 17 extending at an inclined angle with the separating part 16
are formed by bending a single wire, and the distal edges of the locking portions 17 are curved in an arc shape so as to face each other. In this case, the distance between the wires forming the main body part 15, that is, the width of the main body part 15, is set to be equal to or larger than the thickness of the pad back plate 7, and the distance between the hook parts 14 is set to the width of the main body part 15 on both sides of the pad back plate 7. The width and length should be approximately the same. Further, the distance between the hooked end 14a of the hook portion 14 and the main body portion 15 is formed to be slightly larger than the thickness of both side portions of the pad back plate 7. In other words, the pad back plate 7 is supported between the two sides of the opposing hook part 14 of the clip 13, and the hooked end 14a is bent inward to attach the wall surface of the pad back plate 7 to the hook part 1.
It is formed so that it can be pressed and locked with the elastic force of 4.
Further, the locking portion 17 is formed so that the distance between the wires is larger than the groove distance of the guide grooves 11 formed on both sides of the caliper 1, and is formed so as to be locked in the guide groove 11 by the elastic force of the locking portion 17. In this case, a separating part 16 connecting the main body part 15 and the locking part 17 is formed at the position of the pad back plate 7 on which the hook part 14 of the clip 13 is hooked, and on the caliper 1.
Since the guide groove 7 is used to adjust the distance of the guide groove 11 into which the guide groove 7 is inserted, it is formed to have an appropriate length. Also, the locking part 17
guide the tip edges curved in an arc shape so as to avoid contact with the engagement protrusion 12 of the pad back plate 7 that engages with the guide groove 11 of the caliper, extend at an inclined angle, and face each other. It is formed so as to come into contact with the bottom surface of the groove 11 and absorb the play in the length direction of the pad back plate 7. Further, the clips 13 may be provided on both sides of the pad back plate 7, or may be provided only on one side. When provided on both sides, the locking portions 17 of the clips 13 are provided so as to face each other. That is, the hook portion 14 of the clip 13 is formed so as to hang on the outside of the engagement protrusion 12.

Next, a second embodiment will be described.

The clip 13 in the first embodiment was formed by bending a single steel wire rod, but in the second embodiment, a clip 18 formed by bending a thin steel plate was provided to connect the pad back plate 7. It is formed to absorb the clearance between the calipers 1.

The clip 18 is shown in FIGS. 8, 9 and 10.
As shown in the figure, a pair of hook-shaped hooks 20 are provided on a width plate having a width twice or more than the thickness of the pad back plate 7, and the pairs are spaced apart. It is formed by providing a main body part 21 formed of a width-like flat plate connecting two hook parts 20, and a channel-shaped locking part 22 extending outward from one side edge of the main body part 21.

In this case, the locking part 22 is formed in the shape of a channel opening in the opposite direction to the hook part 20, and is inclined with respect to the main body part 21 to facilitate insertion into the guide groove 11 of the caliper 1, and at the same time, Main body part 2
1, as shown in Figure 12,
An elliptical raised portion 23 is provided on the axis of the locking portion 22 to reinforce the rigidity of this bent portion.

Further, as shown in FIG. 11, the channel-shaped locking portion 22 has a cross-sectional shape in which the opening edges of both side walls are curved so as to have outwardly convex surfaces. Each is formed with an inclination so that it slightly expands outward.

Further, as shown in FIG. 13, the hook part 20 is formed by providing a hook base part 25 that connects the main body part 21 and the hooked end 24 with an inclination so as to approach the opposite side. is formed so that the tip edge is bent inward. Further, the spacing between the opposing hook bases 25 of the hook portion 20 is formed to be slightly larger than the width of the pad back plate 7, so that the shortest interval between the hook bases 25 is the same as the width of the pad back plate 7. Form it like this.

The clip 18 in the second embodiment has the main body 21 brought into close contact with the pad back plate 7, and the opposing hook part 20 hooked onto the external end surface of the pad back plate 7.
The hook base 25 clamps the outer peripheral end surface, and the hooked end 24 presses and holds the pad back plate 7. At the same time, the locking part 22 is inserted into the guide groove 11 of the caliper 1, and the pad back plate 7 and the caliper 1 are connected. It is formed to absorb the free play. In this case, both channel-shaped wall portions of the locking portion 22 are inserted into the opposing surfaces of the guide groove 11 with mutual pressure, and the tip portion is in contact with the bottom wall surface of the guide groove 11, so that there is no play in the longitudinal direction. Formed to absorb energy. Clips 18 are also provided on both sides or one side of the pad back plate 7. When provided on both sides, the hook portions 20 are formed so as to be located on the outside of the engaging protrusion 12, and the locking portions 17 of the clip 18 are formed so as to be located in opposing directions.

Since this invention is constructed as claimed in the utility model registration based on the above-mentioned embodiment, there is no play in the engagement between the pad back plate and the caliper, and the caliper does not vibrate when the vehicle is running and is not braking. Even though
Intermittent contact between the pad back plate and the caliper is eliminated, and it is also possible to eliminate the occurrence of metallic sounds. Vibration in the longitudinal direction of the pad back plate is absorbed by the main body and hook through the contact between the clip's locking part and the bottom wall of the guide groove of the caliper, and the vibration in the direction perpendicular to the longitudinal direction is absorbed by the locking part. So,
It becomes possible to eliminate the so-called rattle phenomenon.

Clips made of steel wire rods have the advantage of being extremely lightweight, while clips made of thin steel plates have the advantage of stronger frictional engagement with the guide groove of the locking part. have

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional disc brake with a part removed, Fig. 2 is a right side view of Fig. 1, Fig. 3 is an enlarged explanatory view of an engaging part provided with a clip, and Fig. 4. is a cross-sectional view taken along line A-A in FIG. 3, which also includes the clip, and FIG. 5 is a front view of the clip.
Figure 6 is its side view, Figure 7 is its top view, and Figure 8 is its side view.
Figure 9 is a front view of the clip in another embodiment.
The figure is its side view, Figure 10 is its plan view, and Figure 11 is its side view.
12 is a cross-sectional view of the locking portion, FIG. 12 is a cross-sectional view of the raised portion, and FIG. 13 is a cross-sectional view of the hook portion with a portion removed. 1... Caliper, 2... Anchor plate,
3...Retainer, 4...Rail part, 5...Cylinder, 6...Piston, 7...Pad back plate, 8
... Padded, 9 ... Rotor, 11 ... Guide groove,
12... Engaging protrusion, 13, 18... Clip, 1
4, 20... hook part, 14a, 24... hooked end, 17, 22... locking part, 23... raised part,
25... Hook base.

Claims (1)

[Claims for Utility Model Registration] (1) A pad back that engages with the caliper 1 by inserting engaging protrusions 12 formed on both sides into guide grooves 11 opened on both side end surfaces of the caliper 1 in a disc brake. On the outside of the engagement protrusion 12 of the plate 7, there is provided a pair of opposing hook parts that engage between the outer peripheral end faces in a direction perpendicular to the axis of the engagement protrusion 12, and a pad that connects the hook parts. Back plate 7
a main body in contact with the wall surface of the main body, and a guide groove 1 of the caliper 1 extending outward from one side end of the main body.
1. A rattle prevention device for a disc brake, characterized in that a clip is provided integrally with a locking portion that frictionally engages with the clip. (2) The clip is formed from a single steel wire rod, the main body portion is formed into the main body portion 15 in which the distance between the wire rods is equal to or greater than the thickness of the pad back plate 7, and the hook portion is formed from the hook-shaped end 14.
A is bent inward to form a locking part on the hook part 14 so that the tip edge presses the pad back plate,
A clip 13 is provided on a locking portion 17 that extends at an angle of inclination to the main body portion 15 and has a distal end edge curved in an arc so as to be in contact with the bottom surface of the guide groove 11 of the caliper 1. A rattle prevention device for a disc brake according to claim 1 of the utility model registration claim. (3) The clip is formed by bending a thin steel plate, the main body part is formed into the main body part 21 having a width more than twice the thickness of the pad back plate 7, and the hook part is formed by bending the main body part 21. Hook base 2 connecting the hooked end 24
5 is formed so as to be inclined toward the opposite side, and the tip of the hooked end 24 is bent inward to press the pad back plate 7. The lock is formed in the shape of a channel opening in the opposite direction, and the both side walls are curved to have outward convex surfaces, and the tip part is in contact with the bottom surface of the guide groove 11 of the caliper 1. 21 and the main body 20
A rattle prevention device for a disc brake according to claim 1, which is provided with a clip 18 formed by providing an oval raised portion 23 across the connecting edge of the locking portion 21.