JPH0622637U - Brake pad wear detector mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] In a brake pad wear detector mounting structure that is inserted in the radial direction of a disc brake, so that the detector can be easily mounted and removed and can be elastically locked securely. To do. [Structure] A probe X inserted into a notch 3 provided in a back plate 2 of a brake pad is elastically locked by a clip 4. The notch includes a linear notch for inserting the probe X and a curved notch 3b formed on one side of the back plate. The notch portion 3b has a notch step portion 3c in a part thereof. The clip 4 has two strip-shaped elastic members 4a each having a U-shaped cross section, and the projections 4 are provided at the ends thereof.
b is provided, and the two elastic members 4a are connected by the connecting portion 4c.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for a brake pad wear detector in a disc brake of an automobile or the like.

[0002]

[Prior art]

 In order to detect the wear of the brake pad lining, a detector (generally called a probe) is installed at the wear limit position of the pad, and the wire breakage of the detector is detected electrically by the change of the voltage to detect the wear. Are known. The detector needs to be easily attached as needed and must be attached so that wear detection can be performed stably, and various proposals have been made for its attachment structure. One example is shown in FIG.

In the detector mounting structure shown in the drawing, a notch 13 is provided in a part of the back plate 12 of the brake pad in which the back plate 2 is attached to the lining 11, and a clip 14 is inserted into the notch 13 to probe it. 15 is configured to be inserted from the outer periphery of the pad in the radial direction of the disc brake. The notch 13 is provided with a step portion on the inner side thereof, and the step portion of the clip 14 is engaged with the step portion to prevent the notch 13 from coming off.

[0004]

[Problems to be solved by the device]

 The detector mounting structure of the above-mentioned conventional example is excellent in terms of the design arrangement, especially for the opposed brake.

However, since the clip used in the above-mentioned mounting structure is formed so as to entirely surround the lower half portion of the probe and fit in the notch, a gap is inevitably formed in the fitting portion. There is an unavoidable rattling of the notch in the probe. Therefore, there is a problem that the wear cannot be detected in a stable state as the wear detecting action.

In this invention, in consideration of the problem of the conventional wear detector mounting structure, the detector inserted in the notch formed in the back plate of the brake pad is locked by the clip of the elastic member. An object of the present invention is to provide a mounting structure having a simple structure that is elastically secure and easy to mount and remove.

[0007]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention provides a notch for attaching a wear detector at an appropriate position on a back plate of a brake pad so that the wear detector can be inserted from the outer periphery of the brake pad in the radial direction of the disc brake, In this notch, a guide edge that engages with a groove provided in the detector insertion direction is formed on the back plate, and an elastic clip that elastically engages this detector with the notch is provided. This elastic clip is formed by connecting two strip-shaped elastic members each having a U-shaped cross section and a protrusion at one end, and a step portion with which the protrusion of the clip engages is formed on one side of the notch. The brake pad wear detector is composed of the following structure.

[0008]

[Action]

 In the detector mounting structure of the present invention configured as described above, the elastic clip is put on the detector inserted in the notch of the back plate to be inserted. Insert the elastic clip so that the lower end is pushed open and the back plate is sandwiched, and the lower end is free when inserted to the specified position. This allows the elastic clip to be inserted into and attached to the back plate with the protrusion at the lower end engaging the notch step, and because the detector is pressed elastically against the back plate, the detector is always held in a stable position. To be done.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view in which a probe is mounted on the wear detector mounting structure of the embodiment. As shown in the drawing, the probe X is elastically engaged with a notch 3 provided at an appropriate position of the back plate 2 of the brake pad in which the back plate 2 is attached to the lining 1 by a clip 4 and is mounted.

As shown in FIG. 2, the probe X is composed of a lead wire L which is bent into a U shape inside and integrally molded with resin, as shown in FIG. A guide groove S to be mounted on is formed. As shown in FIG. 6, the notch 3 is provided so that the probe X can be inserted into the back plate 2 from the outer periphery of the brake pad in the disc brake radial direction, and its shape is the thickness of the back plate 2. It is formed so that a straight line and a curved line are superposed in the direction. The thickness of the linear guide edge 3a of the back plate 2 corresponds to the width of the guide groove S of the probe X. The curved cutout portion 3b is provided on one surface side of the back plate 2, and a cutout step portion 3c is formed in a part thereof.

As shown in FIG. 2B, the clip 4 has a projecting portion 4b at the end of a strip-shaped elastic member 4a having a substantially U-shaped cross section, and two portions thereof are connected by a connecting portion 4c. Consists of. Although the connecting portion 4c connects the both at the lower end of the elastic member 4a as shown in the figure, it may be connected at another suitable position. The protruding portion 4b engages with the notch step portion 3c formed on the back plate 2.

FIG. 3, FIG. 4 and FIG. 5 show details of the state where the probe X is assembled to the above-mentioned mounting structure.

When the probe X is attached to the wear detector attachment structure of the embodiment configured as described above, the probe X is elastically engaged with the back plate. For assembly, the groove S 1 of the probe X shown in FIG. 2A is inserted along the guide edge 3a of the notch 3 shown in FIG. 6, and the clip 4 is pushed from above to lock the probe X. At this time, the projection 4b of the clip 4 is engaged with the notch step 3c. Therefore, when both ends of the clip 4 are spread out, the clip 4 is inserted over the back plate 2 and both ends are freed. The back plate 2 is sandwiched and engaged by the elastic force.

When the clip 4 is thus engaged with the back plate 2 via the protrusion 4b, the clip 4 is firmly fixed to the back plate 2, and a part of the strip-shaped portion of the clip 4 is one of the tops of the probe X 1. Since the probe X is prevented from coming into contact with the portion and trying to come out in the direction opposite to the insertion direction, the probe X is eventually locked.

When it is desired to remove the probe X for some reason, the lower end of the clip 4 can be pushed open to easily remove the probe X and the clip 4 from the back plate. Although the shape of the clip 4 is shown as a band-shaped member in the above embodiment, the back plate 2 can be elastically sandwiched by the U-shaped cross-section having the protrusion 4b at the end of the clip 4. It will be apparent to those skilled in the art that various shapes other than the above can be used as long as they are possible.

[0016]

【effect】

 As described in detail above, in the wear detector mounting structure of the present invention, the elastic clip for locking the detector inserted in the notch formed in the brake pad back plate is formed on one side of the notch. Since the protrusions can be inserted freely into the notched steps, the detector can be locked easily and securely by spreading both ends of the elastic clip and pushing it in.Economical and simple. There is an advantage that a mounting structure with various configurations can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a wear detector mounting structure according to an embodiment.

FIG. 2 is a perspective view of a probe and a clip.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view of the above.

FIG. 5 is a side view of the above.

FIG. 6 Detailed view of notch

FIG. 7 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 1 lining 2 back plate 3 notch 3a guide edge 3b notch 3c notch step 4 clip X probe S guide groove

Claims (1)

[Scope of utility model registration request] 1. A notch for mounting a wear detector at an appropriate position on a back plate of a brake pad is provided so that the wear detector can be inserted in the radial direction of the disc brake from the outer periphery of the brake pad. A guide plate is formed on the back plate that engages with a groove provided in the insertion direction, and an elastic clip that elastically engages with the notch is attached to the attached detector. The elastic clip has a cross section of approximately U. Mounting of a brake pad wear detector, which is formed by connecting two band-shaped elastic members having a letter shape and having a protrusion at one end, and a step portion with which the protrusion of the clip engages is formed on one side of the notch. Construction.