JPH04121542U - disc brake - Google Patents

Abstract

(57) [Summary] [Purpose] Locking holes 21 and 22 that lock the bent portions 11 and 12 of the drag reduction spring 10 at the same time in the process of punching out the back metals 2B and 3B of the friction pads 2 and 3 from the plate material. is formed, thereby reducing the overall processing steps and reducing processing costs. [Structure] Locking holes 20 and 21 are provided on the disk 1 side of the back metals 2B and 3B, respectively, in which the bent portions 11 and 12 of the drag reduction spring 10 are locked, and the locking holes 20 and
The locking holes 2 are located on the back metals 2B and 3B located directly on the back side of the
Convex portions 22 and 23 corresponding to 0 and 21 are provided, respectively. Thereby, the locking holes 20, 21 and the protrusions 22, 23 can be created simultaneously in the pressing process when punching out the back metals 2B, 3B from the plate material.
That is, there is no need to provide a separate process for creating the locking holes 20 and 21 into which the ends of the drag reduction spring 10 are locked.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to disc brakes used in vehicles, etc., and is particularly applicable to disc brakes used during assembly. The present invention relates to a disc brake that can reduce costs.

0002

[Conventional technology]

Generally, a disc brake has a disc 1, as shown in Figures 6 and 7. They are arranged opposite to each other on both sides and supported so as to be movable in the axial direction of the disk 1 (in the direction of the arrow Ero). the friction pads 2 and 3, and straddles these friction pads 2 and 3 and the disk 1. The disposed tip was a claw portion (not shown) that presses the back surface of one of the friction pads 2. The caliper 4 is fitted into a cylinder (not shown) formed in the caliper 4. Press the back surface of the other friction pad 3 with a piston (not shown) (press from the direction of arrow A). ), and the back surface of the one friction pad 2 is also pressed through the claw part due to the reaction. (press from the direction of arrow B), and sandwich the disc 1 between the two friction pads 2 and 3. It is known that the brake is applied by The friction pads 2 and 3 are friction pads that slide on the disk 1, as shown in FIG. Friction materials 2A and 3A, and back metals 2B and 3B that support these friction materials 2A and 3A from the back side. It is composed of. The caliper 4 is provided with a pin 6, and the pin 6 is provided on the carrier 5 side. A hole 7 through which a pin 6 is inserted is provided, and these pins 6 and holes 7 The lipper 4 can be relatively displaced with respect to the carrier 5 in the direction of the arrow E.

0003 In addition, the friction pads 2 and 3 have sliding contact between the friction materials 2A and 3A and the disk 1. A drag reduction spring 10 is provided to prevent this. This drag reduction spring 10 has one end bent as shown in FIG. The part 11 is locked in the locking hole 2C of the backing metal 2B, and the bent part 12 at the other end is locked in the locking hole 2C of the backing metal 2B. 3B is locked in the locking hole 3C, and the loop portion 13 in the center thereof is , has a function of urging the back metals 2B and 3B in a direction to separate them from each other. This allows the drag reduction spring to be activated when braking by the piston is discontinued. The back metal 2B is moved in the direction of arrow A and the back metal 3B is moved in the direction of arrow R by the loop portion 13 of the hook 10. In other words, these back metals 2B and 3B are separated from each other. However, this prevents the friction materials 2A and 3A from being dragged by the disk 1. It is something that

0004

[Problem that the idea aims to solve]

By the way, in the disc brake configured as described above, the friction pad When attaching the drag reduction spring 10 to the back metals 2B and 3B of the heads 2 and 3, A locking hole 2C is provided in the back metal 2B and 3B where the drag reduction spring 10 is attached. ・Separate processing steps are required to provide each of the 3Cs, and such processing steps Providing a special There was a problem where the images would be uploaded.

[0005] This idea was made in view of the above circumstances, and was developed for friction pads 2 and 3. In the process of punching out the back metals 2B and 3B from the plate material, the locking holes 2C and 3B are punched out at the same time. 3C, thereby reducing the overall processing steps and reducing the processing cost. The purpose of the present invention is to provide a disc brake that can reduce the cost of disc brakes.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, this invention uses A pair of friction pads are provided, and these friction pads are placed close together toward the disk. a caliper that is displaced in a direction in which the caliper is moved, a carrier that supports the caliper, and A drag reduction spring that urges the friction pads away from the disc. In a disc brake with The friction pad includes a friction material that slides on the disk and a backing metal that supports the friction material. Consisting of A recess in which the end of the drag reduction spring is locked on the disc side of the back metal. A convex portion is provided on the back plate located directly behind the concave portion.

[0007]

[Effect]

According to this invention, the end of the drag reduction spring is engaged with the disk side of the back metal. A concave portion to be stopped is provided, and a convex portion is provided on the back metal located directly behind the concave portion. Therefore, these recesses and protrusions are formed by using the preform when punching out the back metal from the plate material. can be created at the same time in the process. In other words, in the pressing process, the back metal is punched out from the plate material, and the recesses and protrusions are punched out. It is possible to simultaneously perform the work of forming the It is necessary to provide a separate process for creating the recess in which the end of the puller is locked. There's no need.

[0008]

【Example】

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. In this example, the same reference numerals are given to parts that have the same configuration as the conventional technology. to simplify the explanation. In the disc brakes in these figures, the disc brakes shown in the conventional technology The structure is different from that in the back metals 2B and 3B of the friction pads 2 and 3 in the convex portion 29. be.

[0009] First, the convex portions 29 and 28 will be explained. In FIG. 2, reference numerals 24 and 25 respectively indicate recesses 26 of the carrier 5. ・Stainless steel sliding surface protection fixed to 27 along the recesses 26 and 27 It is a plate (retainer). On the other hand, the friction pad 2 has convex portions 28 and 29, and these convex portions 28 and 29 slide. It can be slid freely into the recesses 26 and 27 formed in the surface protection plates 24 and 25 (directly to the paper surface of Fig. 2). They are fitted together so that they can slide freely in intersecting directions. In addition, the sliding surface The guard plates 24 and 25 have their lower portions that press the friction pad 2 upward, i.e. a spring that biases the friction pad 2 in a radial direction from the center of the disk 1; portions 24A and 25A, and thereby the convex portions 28 and 29 of the friction pad 2. so that the upper part slides on the lower part of the recess of the sliding surface protection plates 24 and 25. It has become. Note that the friction pad 3 also has a sliding surface protection plate having the same structure as the friction pad 2. (retainer) is provided.

0010 As shown in FIG. A locking hole 20 (recess) into which the bent portion 11 of the scraping reduction spring 10 is locked is provided. In addition, a drag reduction spring 10 is provided on the disk 1 side of the back metal 3B. A locking hole 21 (recess) into which the bent portion 12 is locked is provided. Further, a convex portion 22 is provided on the back metal 2B located directly behind the locking hole 20, and First, a convex portion 23 is provided on the back metal 3B located directly behind the locking hole 21.

[0011] The back metals 2B and 3B of the friction pads 2 and 3 configured in this way are It is created in a press process for punching out the outer shape. That is, the drag reduction spring 10 is placed on the disk 1 side of the back metals 2B and 3B. Locking holes 20 and 21 are provided in which the bent portions 11 and 12 are respectively locked, and The back metals 2B and 3B located directly behind the locking holes 20 and 21, and the locking holes 20 and 21, Since corresponding protrusions 22 and 23 are provided, these locking holes 2 0 and 21 and the convex parts 22 and 23, when punching out the backing metals 2B and 3B from the plate material. can be created at the same time in the process. As a result, in the press process for punching out the outer shape of the back metal, the back metal 2B and 3B Punching out from the plate material and simultaneously forming the locking holes 20 and 21 and the protrusions 22 and 23. As a result, the drag reduction spring 10 can be bent. The process for creating the locking holes 20 and 21 in which the curved parts 11 and 12 are locked is particularly unique. There is no need to install it vertically, which can reduce the overall machining process. The effect of reducing the cost can be obtained.

0012 Next, a second embodiment of the present invention will be described with reference to FIGS. 4(a) and 4(b). The disc brake shown in these figures is different from the disc brake shown in the first embodiment. The difference in configuration lies in the mounting state of the drag reduction spring 10. In other words, in the press process for punching out the outer shape of the back metal, the back metal 2B and 3B are On the other hand, together with the locking holes 20 and 21, the relief portion 30 (in FIG. 4, the locking hole 21 is (only shown). In the disc brake shown in the second embodiment, the disc brake shown in the first embodiment is Similar to the scrub brake, it can reduce the overall machining process and In addition to achieving the effect of reducing costs, the relief formed in the locking hole 21 The drag reducing spring 10 located between the bent portions 11 and 12 is controlled by the portion 30. , so as to avoid the areas where the friction materials 2A and 3A of the friction pads 2 and 3 are arranged. This allows friction materials 2A and 3A to wear out more than the specified amount. If the disc 1 drags, which would occur in the disc brake shown in Figure 3, It is possible to prevent the occurrence of problems such as contact with the reduction spring 10. It has the effect of

[0013] Next, a third embodiment of the present invention will be described with reference to FIGS. 5(a) and 5(b). The disc brake shown in these figures is the disc brake shown in the first and second embodiments. The difference in configuration from the key is that the protrusion 22 located on the opposite side of the locking holes 20 and 21 ・A wear detection sensor 31 provided on the protrusion 23 (in FIG. 5, the wear detection sensor 31 is provided on the protrusion 23 (Only the wear detection sensor 31 shown in FIG. 1 is shown). This wear detection sensor 31 has a detection portion 31A located at the tip thereof on the side of the disk 1. The friction material 2A, 3A of the friction pads 2, 3 is suitable for When it wears upward, the detection part 31A slides on the surface of the disk 1 and makes an abnormal noise. It is something. In the disc brake shown in the third embodiment, the disc brake shown in the first embodiment is Similar to brakes, it can reduce the overall machining process and reduce the cost for machining. In addition, the wear detection sensor 31 can reduce wear and tear. The user will immediately notice that the friction materials 2A and 3A of the friction pads 2 and 3 have worn out beyond the specified amount. It's starting to be recognized.

[0014] In the above embodiment, the bent portion 11 of the drag reduction spring 20 is The locking position is at the center of the convex portion 29 of the friction pad 2 (at the concave portion of the sliding surface protection plate 25). Points that are more vertically supported (the upper and lower sides in the recess of the sliding surface protection plate 25 shown in Fig. 2) Preferably, the sides are )). This is because the convex portion 29 is made of stainless steel fixed to the concave portion 27 of the carrier 5. This is the position supported by the sliding surface protection plate 25, and the sliding surface is placed in the center of this part. By locking the bending portion 12 of the reduction spring 20, the friction pad 2 is completely removed. This is because it can be spaced uniformly from the disk 1 over the body. i.e. friction The friction pad 2 has an opening between an inner portion and an outer portion in the radial direction of the pad 2. There is no unevenness (there is no upward or downward opening), which makes it possible to This provides the effect of preventing uneven wear of the friction pad 2. Note that the bent portion 12 of the drag reduction spring 20 is connected to the friction pad 3. Similarly to the friction pad 2, the position at which it is locked may be the convex portion 40. preferable.

[0015]

[Effect of the idea]

As is clear from the above explanation, according to the disc brake of the present invention, there is no hidden money. A recess is provided on the disc side to lock the end of the drag reduction spring. First, since the convex part is provided on the back metal located directly behind the concave part, these concave parts The part and the convex part are created at the same time in the pressing process when punching out the back metal from the plate material. can be done. In other words, in the pressing process, the back metal is punched out from the plate material, and the recesses and protrusions are punched out. It is possible to simultaneously perform the work of forming the It is necessary to provide a separate process for creating the recess in which the end of the puller is locked. As a result, the overall processing steps can be reduced and the processing This has the effect of reducing the cost of the process. In addition, the convex portions created in the pressing process may contain more friction material than necessary, for example. It can be used to provide a wear detection sensor that detects wear.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing the entire disc brake.

FIG. 2 is a sectional view of the disc brake of FIG. 1 viewed from the friction pad 2 side, with the caliper shown in FIG. 1 removed.

FIG. 3 is a sectional view taken along line A-A in FIG. 2, showing the first aspect of the present invention.
An example is shown.

FIG. 4 shows a second embodiment of the present invention,
(a) is a sectional view corresponding to FIG. 3, and (b) is a cross-sectional view corresponding to FIG.
A cross-sectional view taken along the line B-B.

FIG. 5 shows a third embodiment of the present invention,
(a) is a sectional view corresponding to FIG. 3, and (b) is a cross-sectional view corresponding to FIG.
A cross-sectional view taken along line CC.

FIG. 6 is a partially cutaway plan view of the entire disc brake, showing a conventional technique.

7 is a cross-sectional view taken along the line DD in FIG. 6 showing a state in which a drag reduction spring is attached to a friction pad according to a conventional technique.

[Explanation of symbols]

1 disc 2 Friction pad 2A Friction material 2B Secret money 3 Friction pad 3A Friction material 3B Secret money 4 Caliper 5 Career 10 Drag reduction spring 20 Locking hole 21 Locking hole 22 Convex part 23 Convex part

Claims (1)

[Scope of utility model registration request] 1. A pair of friction pads provided in a positional relationship opposite to each other with a disk in between, a caliper that displaces the friction pads in a direction toward the disk so that they approach together, a carrier that supports the caliper, and a carrier that supports the caliper. In a disc brake having a drag reduction spring that urges a friction pad in a direction away from the disc, the friction pad is composed of a friction material that slides on the disc and a back metal that supports the friction material, and the friction pad A disc brake characterized in that a recess is provided on the disc side of the disc to which the end of the drag reduction spring is locked, and a convex part is provided on the back plate located directly behind the recess. .