JP2910971B2 - Disc brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake used for braking a vehicle or the like.

[0002]

2. Description of the Related Art Conventionally, a disc brake used for braking a vehicle or the like is provided with a pad having a backing metal and a lining fixed to one surface of the backing metal, and a pad opposite to the lining fixing side of the backing metal. There is a configuration having a plate-shaped member having a pilot hole penetrating in the thickness direction, and a pressing unit for pressing a pad via the plate-shaped member to bring the lining into contact with the disk. Here, the pressing means has, for example, a substantially bottomed cylindrical piston and a claw portion (reaction portion) having two pressing portions opposed to each other on the opening side of the piston. By moving the pad forward, the pair of pads is nipped and pressed between the opening side of the piston and the claw to bring the pads into contact with an intervening disk. Then, between the piston and the pad pressed by this, and between the claw portion and the pad pressed by this, for example, a shim to prevent brake squeal and the like, or a cover or the like covering this shim is provided. They are provided as needed, and these constitute the plate-like member. The pilot hole is used as a positioning hole for intermittently feeding a band-shaped material at a constant pitch during press forming of a shim.

Conventionally, pilot holes formed in a plate-like member such as a shim or a cover for positioning, for example, by a machine at the time of pressing and penetrating in a thickness direction are as follows. ing. For example, as shown in FIG. 4, the pilot hole 33 of the shim 32 provided between the piston 30 and the pad 31 is formed between two pressing ranges X and X by the hatched piston 30. . Also, as shown in FIG.
The pilot hole 35 of the cover 34 provided between the piston 30 and the pad 31 is formed between two pressing ranges X and X by the hatched piston 30, or as shown in FIG. Two pressing ranges X,
Some of them are formed so as to partially overlap X. Further, as shown in FIG. 7, a pilot hole 39 of a shim 38 provided between the claw portion 36 and the pad 37 is formed between two pressing ranges Y, Y by the hatched claw portion 36. 8, or formed in two pressing ranges Y, Y by the claw portion 36, as shown in FIG. 9, or partially formed in the two pressing ranges Y, Y by the claw portion 36, as shown in FIG. Are formed to overlap.

[0004]

Here, the width of the shim or the cover (A ₁ + A in FIG. 4) where the pressing force of the pressing means such as the piston or the claw portion acts largely due to the presence of the pilot hole is provided. ₂ , B in FIG.
₁ + B ₂ , C ₁ + C ₂ in FIG. 6, and D _{1 in} FIG.
+ D ₂ , E ₁ + E ₂ in FIGS. 8 and 9) is reduced and the strength is reduced. Therefore, if at least a part of the pilot hole is formed in this portion, cracks and breakage occur. Or warped. When the warp occurs, the warp increases the distance between the pad and the pressing means, and the pad may be dragged.

Accordingly, an object of the present invention is to provide a disc brake capable of preventing a plate-like member such as a shim or a cover from being cracked, broken or warped by a pressing force from a pressing means. To provide.

[0006]

In order to achieve the above object, the present invention provides a pad having a back metal and a lining fixed to one surface of the back metal, and a pad provided on the back metal opposite to the lining fixing side. a plate member that is, the pad is pressed through the plate-like member, the disc brake having a pressing means for contacting the lining disc, the plate-like member, sequential constant strip material
Forming by pressing while intermittently feeding at the pitch
The plate-shaped member is coated with the strip-shaped material.
Thickness used for intermittent feed during machining
The pilot hole that penetrates in the
The pilot hole has a pressing range by the pressing means and the
It is characterized in that it remains at an outer position except between the pressing ranges .

[0007]

According to the disk brake of the present invention, the pilot hole is formed in the plate-shaped member at the pressing range of the pressing means and at an outer position except between the pressing ranges, so that the pressing force of the pressing means is large. Thus, there is no pilot hole for reducing the strength between the pressing range by the pressing means and the pressing range. Therefore, since the strength of this portion is ensured in the plate-shaped member, it is possible to prevent the plate member from being cracked, broken, or warped by the pressing force from the pressing means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disc brake according to one embodiment of the present invention will be described below. The disc brake of this embodiment has a conventionally well-known structure except for a plate-like member described below. In the figure, reference numeral 1 denotes an inner pad having a back metal 2 and a lining (not shown) fixed to one surface of the back metal 2 (see FIGS. 1 and 2), and reference numeral 3 denotes a similar outer pad (see FIG. 3). Reference numeral 4 denotes a pressing means such as a caliper for pressing both pads 1 and 3 from the back metal 2 side to bring the lining into contact with a disc (not shown).

Here, the back metal 2 of each of the inner pad 1 and the outer pad 3 is provided between the engaging portions 5 at both ends slidably supported by a carrier (not shown) and between these engaging portions 5 and not shown. Main part 6 with lining adhered to one side
And

The pressing means 4 includes a claw portion 8 (see FIG. 1) having a substantially cylindrical bottomed piston 7 (see FIGS. 1 and 2) and two pressing portions disposed opposite to the opening side of the piston 7. 3), the piston 7 is advanced to the claw portion 8 side by hydraulic pressure, so that the pair of the inner pad 1 and the outer pad 3 are respectively connected to the back metal 2 side by the opening side of the piston 7 and the claw portion 8. Then, the lining (not shown) of these pads 1 and 3 is brought into contact with an intervening disk (not shown) by pressing.

[0011] Between the piston 7 and the opposite side of the inner pad 1 pressed by the piston 7 with respect to the lining fixing side of the back metal 2, an inner shim 10 (FIG. 1), a cover 11 (see FIG. 2), which is a plate-like member, is provided on the piston 7 side. An outer shim 12 which is a plate-like member is provided between the claw portion 8 and the opposite side of the outer pad 3 pressed by the claw portion 8 from the lining fixing side of the back metal 2.
(See FIG. 3). The inner shim 10 substantially covers the back metal 2 of the inner pad 1, and is locked to the back metal 2 of the inner pad 1 by a locking claw 14 formed by bending up and down in FIG. The cover 11 also
The backing metal 2 of the inner pad 1 is substantially covered, and is locked to the backing metal 2 of the inner pad 1 by a locking claw 15 bent and formed at a position not to interfere with the locking claw 14 in FIG. It has become. The outer shim 12 is the outer pad 3
And is locked to the back metal 2 of the outer pad 3 by a locking claw 16 bent up and down in FIG.

In this embodiment, the inner shim 1
As shown in FIG. 1, 0 is an outer position excluding two pressing ranges X by the hatched piston 7 and excluding between the pressing ranges X and X, and is a circumferential direction (not shown) of the disk. Pilot holes 17 penetrating in the thickness direction are formed near both ends in the left-right direction in the figure).
Further, in this embodiment, as shown in FIG. 2, the cover 11 has an outer position excluding two pressing ranges X by the hatched piston 7 and excluding between the pressing ranges X and X, Pilot holes 18 penetrating in the thickness direction are formed in the vicinity of both ends in the circumferential direction (left-right direction in the figure) of the disc (not shown). Further, in this embodiment,
As shown in FIG. 3, the outer shim 12 is located at an outer position excluding two pressing ranges Y by the hatched claw portions 8 and excluding between the pressing ranges Y and Y, and has a circumference of a disc (not shown). Pilot holes 19 penetrating in the thickness direction are formed near both ends in the direction (left-right direction in the figure).

According to the disk brake of this embodiment having the above-described structure, the inner shim 10, the cover 11 and the outer shim 12 are respectively provided with the pressing range X, the pressing range Y, the pressing range X, between the pressing ranges X and X by the pressing means 4. The pilot holes 17, 18, and
19 are formed. Therefore, the inner shim 10, the cover 11 and the outer shim 12
Holes 17 and 1 for reducing the strength in the pressing range X, pressing range Y, between the pressing ranges X and X or between the pressing ranges Y and Y by the pressing means, in which the pressing force exerted by the pressing means is large.
8 and 19 are not located, and the width (A in FIG. 1, B in FIG. 2, and D and E in FIG. 3) in this portion can be secured. Therefore, the inner shim 10, the cover 11, and the outer shim 12 have sufficient strength at a portion where the pressing force of the pressing means 4 acts greatly, and the pressing force from the pressing means 4 may cause cracks, breakage, or warpage. Is prevented.

As described above, the inner shim 10 and the cover 11
The outer shim 12 improves reliability by preventing cracks and breakage, and also prevents warpage and improves flatness. Therefore, the required amount of brake fluid for moving the piston 7 can be reduced, and the inner pad 1 and the outer pad 2 can be reduced.
Can be prevented, and brake squeal can also be suppressed.

[0015]

As described above in detail, according to the disc brake of the present invention, the pilot hole is formed in the plate-shaped member at the pressing range by the pressing means and at the outside position except between the pressing ranges. In addition, there is no pilot hole for reducing the strength between the pressing range and the pressing range in which the pressing force by the pressing means largely acts. Therefore, the plate-shaped member has sufficient strength in this portion, and is prevented from being cracked or damaged by the pressing force from the pressing means, thereby improving reliability and preventing occurrence of warpage. This can reduce the required amount of liquid for operating the pressing means, prevent the pad from being dragged, and suppress the brake noise.

[Brief description of the drawings]

FIG. 1 is a schematic view of an inner pad, an inner shim, and a piston of a disc brake according to an embodiment of the present invention, as viewed from a piston side.

FIG. 2 is a schematic view of an inner pad, a cover, and a piston of a disc brake according to one embodiment of the present invention, as viewed from a piston side.

FIG. 3 is a schematic view of an outer pad, an outer shim and a claw portion of a disc brake according to an embodiment of the present invention, as viewed from the claw portion side.

FIG. 4 is a schematic view showing an example of an inner pad, an inner shim, and a piston of a conventional disc brake viewed from a piston side.

FIG. 5 is a schematic view showing an example of an inner pad, a cover, and a piston of a conventional disc brake viewed from a piston side.

FIG. 6 is a schematic view showing another example of an inner pad, a cover, and a piston of a conventional disc brake viewed from a piston side.

FIG. 7 is a schematic view showing an example of an outer pad, an outer shim, and a claw portion of a conventional disc brake viewed from a claw portion side.

FIG. 8 is a schematic view showing another example of an outer pad, an outer shim and a claw portion of a conventional disc brake viewed from the claw portion side.

FIG. 9 is a schematic view showing still another example of the outer pad, the outer shim, and the claw portion of the conventional disc brake viewed from the claw portion side.

[Explanation of symbols]

 1, 3 pad 2 back metal 4 pressing means 10 inner shim (plate-like member) 11 cover (plate-like member) 12 outer shim (plate-like member) 17, 18, 19 Pilot hole X, Y Pressing range

──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model Sho 61-166241 (JP, U) Japanese Utility Model Utility Model Hei 1-77145 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) F16D 65/02-65/097 F16D 55/22-55/224

Claims (1)

(57) [Claims] And 1. A pad having a lining secured to one surface of the backing metal and backing metal, a plate-like member that Re provided et <br/> on the opposite side with respect to the lining fixed side of the back metal, the pad A disc brake having a pressing means for pressing the lining against a disc by pressing the plate-shaped member through the plate-shaped member ;
It is not formed by pressing while feeding
The plate-shaped member is intermittently pressed at the time of pressing the band-shaped material.
Penetrated in the thickness direction used for positioning
And the pilot hole remains.
Between the pressing range by the pressing means and the pressing range
A disc brake characterized in that it remains at an outer position except for the outer side .