JPH0612260Y2 - Disc brake friction pad support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to a friction pad support in a disc brake.

[Background of the Invention] FIG. 5 shows an example of a conventional disc brake. This disc brake 1 holds friction pads 3 and 4 arranged on both sides of a rotor (disc rotor: not shown in this figure) and via another fixing member fixed directly to the vehicle body or fixed to the vehicle body. And a caliper body 5 equipped with a friction pad actuating device (not shown) including a hydraulically actuated piston and the like, and the caliper body 5 is provided.
Are guided by the friction pad support 2.

As shown in FIG. 6 when the friction pad support body 2 is viewed from the outside in the radial direction of the disc rotor as a single piece, the friction pad support body 2 is directly attached to the vehicle body or indirectly through another fixing member fixed to the vehicle body. A main body 6 mounted and located on one side of the disk rotor, a pair of opposed torque receiving arms 7, 7 formed integrally with the main body 6 and spaced apart in the disk rotor circumferential direction, and the pair of torque receiving arms. And a bridge portion 8 fixed between the tip portions of the arms 7 and 7, which is generated in the friction pad by contact between the disc rotor and the friction pad when the disc rotor rotates in one direction or the opposite direction. First, the braking torque obtained by the pair of arms 7,
One of the arms 7 and 7 is transmitted to the other arm 7 through the bridge 8 so that the braking torque can be received by both arms 7, 7. As a result, the reception of the braking torque is distributed to both arms 7, 7.

Further, in the disc brake of this example, the outer wall surfaces 7a, 7a of the portions of the torque receiving arms 7, 7 engaging with the bridge 8 are
a is formed into a tapered surface, and both end portions 9 and 9 of the bridge 8 fitted to the tip end portions of the torque receiving arms 7 and 7
Has a U-shaped cross-section, and inner wall surfaces 9a, 9a contacting the outer wall surfaces 7a, 7a of the torque receiving arm are formed into tapered surfaces, and the bolts 10, 10 connect both end portions 9, 9 of the bridge 8 to each other. By screwing onto the torque receiving arms 7 and 7, the bridge 8 is fixed in a state where the torque receiving arms 7 and 7 are elastically deformed in the direction in which they approach each other, and the torque receiving arms 7 and 7 and the bridge 8 are attached without play. Thus, the torque at the initial stage of braking can be surely received by the both arms 7, 7.

By the way, in the friction pad support constructed in this way, the braking torque acting in the circumferential direction of the disk rotor is the torque receiving arms 7, 7 and both ends 9, 9 of the bridge.
Although it will be received by the mating surface of the friction pad, the upward force (couple force) of the friction pad is to be received by the bolts 10, 10 for fastening the torque receiving arms 7, 7 and the bridge 8.
Further, since a slight gap is usually allowed between the bolt 10 and the bolt hole of the bridge 8 through which the bolt 10 is inserted, the couple 8 of the friction pad is kept until the bolt 10 contacts the screw hole. It is movable in the rotor radial direction with respect to the torque receiving arm 7, whereby the bolt 10
In addition to the risk of loosening, the diameter of the bolt 10 must be increased in order to receive the couple force with the bolt 10, and the width of the bridge 8 can be increased in accordance with the expansion of the diameter of the bolt hole of the bridge 8. As a result, the disc brake tends to be heavy.

[Object of the Invention] The present invention has been made in order to solve such a conventional problem, and the braking torque applied to the torque receiving arm on one side of the friction pad support body is applied to the other arm without delay. An object of the present invention is to provide a friction pad support body for a disc brake that can be transmitted and can receive couples well.

[Summary of the Invention] For this purpose, the inventor of the present invention provides a support body mounted on the vehicle body on one side of the rotor that rotates with the wheels, and a part of the support body that is spaced apart and faces the rotor circumferential direction. A pair of torque receiving arms and a bridge that spans between the pair of torque receiving arms, and supports a pair of friction pads arranged on both sides of the rotor so as to be movable in the rotor axial direction. In the friction pad support of the disc brake, the connecting portion with the bridge whose both ends are connected to the pair of torque receiving arms is the first engaging portion for restricting the circumferential bridge movement of the rotor. , A second engaging portion that restricts radial radial bridge movement of the rotor, and one of these engaging portions is formed in a block in which the torque receiving arm and the bridge engage, and these engaging portions are engaged with each other. One of the other parts is formed inside the block, and the first engaging part and the second engaging part are provided so as to wedge-engage with each other. The present invention has been completed which comprises a friction pad support body for a disc brake, which is characterized by

[Embodiment of the Invention] Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

7 is an exploded perspective view of a disc brake in which the present invention can be effectively implemented. FIG. 1 is a plan view including a partial cross section of its assembled state, and FIG. 2 is a plan view of FIG. The figure which looked at the friction pad support body 22 corresponding to the arrow A view and the C arrow view of FIG. 1 from the disc rotor side is shown. FIG. 3 shows a view of the outer bridge 24 viewed from the disc rotor side, which corresponds to the arrow B view of FIG. 7 and the arrow D view of FIG. FIG. 4 is a perspective view showing a disassembled portion of the friction pad support body 22 and the outer bridge 24, which corresponds to the arrow E view in FIG.

In these figures, 20 is a friction pad support,
A support body 22 for supporting an inner friction pad 21 arranged inside the disc rotor R (right side in FIG. 1) so as to be movable in the axial direction of the disc rotor, and a disc rotor.
A bridge 24 that supports an outer friction pad 23 disposed outside R (on the left side in FIG. 1) so as to be movable in the axial direction of the disc rotor, and includes the support body 2 described above.
2 is attached and fixed to a vehicle body (not shown) directly or indirectly via another fixing member.

Reference numeral 25 denotes a caliper body equipped with two hydraulically actuated pistons 26 for pressing the inner friction pad 21, and is supported by guide pins 27, 27 attached to the support body 22 so as to be slidable in its axial direction. Also, at the tip end portion that extends to the opposite side across the radially outer edge portion of the disk rotor R , the pin 28 protruding from the bridge 24 slides, and this portion is also movably supported in the axial direction. By these, the axial movement of the disk rotor can be favorably performed.

As shown in FIGS. 2 and 4, the support body 22 is attached to a vehicle body (a knuckle of a wheel or the like) at a plate-like base plate portion 29 thereof parallel to the rotation surface of the disc rotor R , and the annular shape A pair of torque receiving arms 30, 30 supporting the inner friction pad 21 are integrally formed toward the bridge 24 on both sides of the base plate portion 29 in the circumferential direction of the disc rotor. Convex portions 35, 37 to which both ends of the bridge 24 are attached to the tip end portion that extends to the radially outer position of the disk rotor of FIG.
Etc. are provided. As shown in FIG. 1, the arms 30, 30 each have a convex portion that slightly crosses the radially outer edge of the disk rotor R and projects slightly to the opposite side. 30a, 3
Reference numeral 0a is a recess for supporting the left and right ears of the inner friction pad 21.

The bridge 24 assembled to the support body 22 is
As shown in FIGS. 3 and 4, it has two arcuate arcuate portions 31 and 31 that are separated from each other in the radial direction of the disc rotor, and has outer friction pads 23 at both ends in the circumferential direction of the disc rotor. Engagement part 3 with which the concave ears on both ends of the
2 and 32, and fitting portions 33 and 33 provided with recesses 36 and the like for fitting with the tip portions of the arms 30 and 30 are formed. And the fitting portion 33 of the bridge 24
Is the convex portions 35, 37 at the tip of the torque receiving arm 30.
And a block that engages with.

As shown in FIG. 4, the fitting portions 33, 33 of the bridge 24 have a first recess 34 and a second recess 36 further recessed from the bottom surface of the first recess 34. And the opposing side wall surfaces 34 of the first concave portion 34 are
a and 34a are formed in a tapered surface that widens toward the opening end, and the inner wall surface 36a on the outer side of the second concave portion 36,
36a is formed in a tapered surface that widens toward the opening end.

On the other hand, at the tip end portion of the arm 30 on the side of the support body, a first convex portion 35 that engages with the first concave portion 34 of the bridge 24 to form a first engaging portion, and a second convex portion 35 A second convex portion 27 that engages with the concave portion 36 to form a second engaging portion is provided, and a first engaging portion formed by the first concave portion 34 and the first convex portion 35. The second engaging portion formed of the second concave portion 36 and the second convex portion 37 is formed with a tapered surface corresponding to the tapered surface of the mating partner so as to perform wedge engagement. ing. That is, both side wall surfaces 35a, 35a in the circumferential direction of the first convex portion 35 are formed into tapered surfaces that become narrower toward the tip, and the second convex portion 37 becomes narrower as the outer wall surface 37a faces the tip. Is formed into a tapered surface.

Reference numeral 40 denotes a bolt for fixing the bridge 24 to the support body 22, so that the bolt 24 is screwed into a screw hole 42 provided at the tip of the arm 30 through a bolt hole 41 formed in the fitting portion 33 of the bridge 24. It has become.

With these, when the bridge 24 is fitted and fixed to the arm 30 of the support body 22, the first concave portion 34 and the second concave portion 36 on the bridge 24 side, and the first convex portion 35 on the arm 30 side, Since the second convex portions 37 are closely fitted to each other by the respective tapered surfaces, the bridge 24 is fitted to the support body 22 in the rotor circumferential direction and the radial direction without any play. The bolt 40 is fastened and fixed in this state. Therefore, in the disc brake of this example, the braking torque and the couple of the friction pad can be transmitted by the respective surfaces at the connecting portion between the support body and the bridge.

[Advantages of the Invention] As described above, according to the present invention, the pair of torque receiving arms and the both ends of the bridge are provided with the first engaging portion and the second engaging portion whose pressure receiving surfaces are tapered. Since they are fitted with each other by the engaging portion, the torque receiving arm and the bridge are connected without any play in the couple force acting direction and the braking torque acting direction of the friction pad, and the braking torque at the time of braking is applied to one arm. In addition to being received by the other arm through the bridge without delay, and the braking torque and the couple force are received by the taper surface, for example, for a bolt or the like for fixing the bridge to the torque receiving arm, Since a shearing force does not act and a small diameter bolt can be used, the weight of the disc brake can be reduced and the movement of the bridge with respect to the torque receiving arm is blocked. As a result, it is possible to obtain an effect that the loosening of the bolt can be prevented.

[Brief description of drawings]

FIG. 7 is an exploded perspective view of a disc brake in which the present invention can be effectively implemented. FIG. 1 is a plan view including a partial cross section of its assembled state, and FIG. FIG. 8 is a view of the friction pad support body 22 corresponding to the direction of arrow C and the direction of arrow A of FIG. Figure 3 shows
The figure which looked at the outer bridge 24 corresponding to the arrow D of FIG. 1 and the arrow B of FIG. 7 from the disk rotor side is shown. FIG. 4 is a perspective view showing a disassembled portion of the friction pad support body 22 and the outer bridge 24, which corresponds to the arrow E view in FIG. FIG. 4 is an exploded perspective view of essential parts of the friction pad support, FIG. 5 is a perspective view of a conventional disc brake, and FIG. 6 is a plan view showing a schematic configuration of the friction pad support. 20: Friction pad support, 21: Inner friction pad, 22: Support body, 23: Outer friction pad, 24: Bridge, 25: Caliper body, 26: Piston, 27: Guide pin, 28: Pin, 29: Substrate Part, 30: arm, 31: bow part, 32: engaging part, 33: fitting part, 34: first concave part, 35: first convex part, 36: second concave part, 37: second Convex part, 40: Bolt, 41: Bolt hole, 42: Screw hole.

Claims (1)

[Scope of utility model registration request] 1. A support body mounted on a vehicle body on one side of a rotor that rotates together with a wheel, and a pair of torque receiving arms provided as a part of the support body so as to face each other in a circumferential direction of the rotor. And a pair of bridges bridged between the pair of torque receiving arms to support a pair of friction pads disposed on both sides of the rotor so as to be movable in the rotor axial direction. The connecting portion with the bridge, both ends of which are connected to the pair of torque receiving arms, includes a first engaging portion that restricts bridge movement in the circumferential direction of the rotor and a bridge movement in the radial direction of the rotor. And a second engaging portion that restricts the torque receiving arm and the bridge that engage with the torque receiving arm and the other of the engaging portions. A disc brake formed on the inner side of the lock, wherein the first engaging portion and the second engaging portion are provided so as to wedge-engage with an engaging counterpart. Friction pad support.