JPH0438107Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to disc brakes, and more particularly to improvements in disc brakes of the type having a caliper supported by a single slide pin.

Prior Art A support member fixed to a non-rotating member on one side of a disc rotor, a cylinder part into which a piston is slidably fitted, and a claw facing the cylinder part in a direction parallel to the axis of the disc rotor. and a connecting portion that connects the cylinder portion and the claw portion, and is provided straddling the outer circumferential side of the disc rotor, and in the cylinder portion, the axis of the disc rotor is connected to the support member through one slide pin. a caliper that is supported so as to be movable in a direction parallel to the caliper, and a pair of pads that are arranged on both sides of the disc rotor inside the caliper and that are pressed against both sides of the disc rotor by the piston and the pawl portion, respectively. A disc brake equipped with the following is known. For example, the one described in Japanese Patent Application Laid-Open No. 50-109371 is one example.

In this disc brake, a pair of pads are attached to the claw part of the caliper and the protruding end of the piston, respectively, and the braking torque generated when the pads are pressed against the disc rotor is transmitted from these pads to the caliper. It is adapted to be received by a support member (fixed support).

Problems to be Solved by the Invention However, in such a disc brake, the braking torque is supported at a position on the cylinder side where the slide pin is provided and at a position relatively distant from the rotating surface (braking surface) of the disc rotor. Since the caliper is designed to be received by a member, it is difficult to avoid generating a relatively large rotational moment in the caliper around the point of contact with the support member located on the cylinder side during braking.
There were problems such as the slide pin becoming twisted, which hindered the smooth operation of the caliper, and the pads becoming unevenly worn.

On the other hand, for example, as in the disc brake described in FIG. 4 of JP-A No. 59-77133, a support member is placed around the disc rotor at a connecting part located closer to the disc rotor than the cylinder part of the caliper. If you make them contact in the direction,
It is believed that the above problem can be solved by suppressing the rotational moment of the caliper.

However, the contact between the connecting part of the caliper and the support member in the disc brake described in FIG. Therefore, the sliding portion between the support member and the caliper is usually relatively long so that it straddles the disc rotor. As a result, the above publication
When the contact technique between the caliper connecting part and the supporting member in the disc brake described in FIG. 4 is applied to a single slide pin type disc brake, the relatively long sliding between the supporting member and the caliper connecting part Since the braking torque is received at this portion, it is difficult to avoid an increase in the sliding resistance of the caliper.

On the other hand, if the supporting member is brought into contact only with the part of the connecting part of the caliper that is located closer to the pawl than the disk rotor, the contact point on the cylinder part side can be centered without increasing the sliding resistance of the caliper. It is thought that it is possible to eliminate the rotational moment of the caliper, but in this case, since a rotational moment centered on the contact point on the claw side is generated in the caliper, prying of the slide pin and uneven wear of the pad can be prevented. It is difficult to do so.

Means for Solving the Problems The present invention was made against the background of the above-mentioned circumstances, and its gist is that in the disc brake as described above, the pads are arranged in the circumferential direction of the disc rotor. The support member is movably engaged with the coupling portion of the caliper in a direction parallel to the axis of the disc rotor, and the support member is connected to a portion of the coupling portion of the caliper located between the pair of pads and the disc rotor. By making contact in the circumferential direction of the disc rotor, the braking torque applied to the caliper is received substantially on the rotating surface of the disc rotor.

Function and Effect of the Invention With this structure, during braking, the support member is brought into contact with the portion located between the pair of pads of the connecting part of the caliper in the circumferential direction of the disc rotor, so that the braking torque is applied to the caliper. Since the brake torque is received by the support member approximately on the rotational surface of the disc rotor, which is the position where the braking torque is generated, it is possible to almost eliminate a relatively large rotational moment from being applied to the caliper. This prevents the slide pin from being twisted, maintains smooth operation of the caliper, and effectively prevents uneven wear of the pads. In this case,
When the support member is brought into contact with the part located between the pair of pads of the connecting part of the caliper, the dimension of the sliding part between the caliper and the support member in the direction parallel to the disk rotor axis can be suitably reduced. ,
There is an advantage that the above effects can be obtained without increasing the sliding resistance of the caliper.

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

In FIG. 3, reference numeral 10 denotes a caliper disposed astride the outer periphery of the disc rotor 12. As shown in FIG. Calipa 1
0 has a piston 14 inside and a disc rotor 12.
a cylinder portion 16 that is slidably fitted in a direction parallel to the axis of the disc rotor 12; a claw portion 18 that faces the cylinder portion 16 and a predetermined interval apart in a direction parallel to the axis of the disc rotor 12; Part 16
and a connecting part 20 that connects the claw part 18. In this caliper 10, a guide hole 22 integrally provided in the cylinder portion 16 is slidably fitted into a slide pin 26 protruding from a torque plate 24 fixed to a non-rotating member (not shown). As a result, the disk rotor 12 is supported so as to be able to float in a direction parallel to the axis of the disk rotor 12. In this embodiment, the torque plate 24 constitutes a support member. As shown in FIGS. 1 and 2, each pair of protrusions 28 and 30 are located on both sides of the disk rotor 12 in the axial direction of the connecting portion 20, and are located on both sides of the disk rotor 12 in the axial direction. They are provided at predetermined intervals.
This predetermined interval allows the pads 42, 44 to be attached to the protrusions 28, 30, which will be described later, and even when the pads 42, 44 are at maximum wear.
2 and 44 and the protrusions 28 and 30 are maintained at intervals that can maintain engagement between the protrusions 28 and 30.

As shown in FIGS. 1 to 3, the torque plate 24 is made of a single plate and is bent into an approximately L-shape as a whole, and has a fixed portion that is approximately parallel to the rotating surface of the disc rotor 12. 32 and its fixed part 32
The overpass portion 34 extends from the tip of the disk rotor 12 in a direction parallel to the axis of the disk rotor 12 and rides over the outer circumferential portion of the disk rotor 12. A notch 36 is formed in the intermediate portion of the torque plate 24, and is connected to the fixing portion 32 and the overpassing portion 34.
The caliper 10 is accommodated within this notch 36. Both inner wall surfaces 37 and 39 of the notch 36 that are opposed to each other in the circumferential direction of the disc rotor 12 have a protruding center located approximately on the rotating surface of the disc rotor 12, more precisely, the center of the disc rotor 12 in the thickness direction. A pair of protrusions 38 and 40 are provided at the respective positions, and these protrusions 38 and 4
0 are brought into substantially contact with both circumferential sides of the disc rotor 12 of the connecting portion 20 located between the protrusions 28 and 30, respectively.

As shown in FIGS. 1 to 3, a pair of pads 42 and 44 are disposed inside the caliper 10, that is, between the piston 14 and the pawl 18, with the disc rotor 12 sandwiched therebetween. ing. The pads 42, 44 consist of back plates 46, 48 and friction materials 50, 52 fixed to them.
Engagement portions 58 and 60 are provided on both sides of the disk rotor 12 in the circumferential direction, respectively, and have recesses 54 and 56 that extend toward the outer circumferential side of the disk rotor 12 and face each other. By engaging these engaging portions 58 and 60 with the protrusions 28 and 30 of the connecting portion 20 in the recesses 54 and 56, respectively, the pads 42 and 44 substantially prevent the disk rotor 12 from moving in the radial and circumferential directions. It is supported by the caliper 10 in a blocked state and movable in a direction parallel to the axis of the disc rotor 12.

In the disc brake configured as described above, when the piston 14 is pushed out, one pad 44 is pressed against one surface of the disc rotor 12, and the reaction force causes the caliper 10 to move in the opposite direction to the direction in which the piston 14 projects. Braking is performed by moving the other pad 42 relative to the other surface of the disk rotor 12 by the claw portion 18. At this time, if the disc rotor 12 is rotating, for example, in the direction A in FIGS. The torque plate 24 receives the protruding portion 38 based on the contact with one of the protruding portions 38 located substantially on the rotating surface of the rotor 12, so that the braking torque is received on the cylinder portion 16 side as in the conventional case.
During braking, the rotational moment in the clockwise direction in FIG. 1 acting on the caliper 10 is almost eliminated, and the rotational moment in the counterclockwise direction in FIG. is eliminated from acting on the caliper 10. This prevents the slide pin 26 from being twisted, maintains smooth operation of the caliper 10, and effectively prevents uneven wear of the pads 42, 44.

Further, according to this embodiment, the torque plate 24 is connected to the connecting portion 2 of the caliper 10 at the protruding portion 38 or the protruding portion 40 located between the pads 42 and 44.
0 in the circumferential direction of the disc rotor 12, the caliper 10 and the torque plate 24
The dimension of the sliding portion in the direction parallel to the axis of the disc rotor 12 can be suitably reduced, which has the advantage that the above effects can be obtained without increasing the sliding resistance of the caliper 10.

In addition, in the above-mentioned embodiment, the pad 42,
44 are protrusions 28 and 30 provided on both sides of the disc rotor 12 in the circumferential direction of the connecting portion 20 of the caliper 10.
However, it is also possible to directly engage the both sides without providing such protrusions 28 and 30. It may be engaged with parts other than both side parts.

Further, in the above embodiment, the slide pin 26 is connected to the center of the cylinder portion 16 and the disc rotor 1.
Although the slide pin is located substantially on a straight line connecting the centers of the two, it goes without saying that the present invention can also be applied to cases where the slide pin is provided at a position a predetermined distance from the straight line.

In addition, various changes may be made to the present invention without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing the main parts of a disc brake to which the present invention is applied. FIG. 2 is a diagram showing a main part in the direction of arrow B in FIG. 1, with a part cut away. FIG. 3 is an enlarged view showing a main part of a cross section taken along the line - in FIG. 1. 10... Caliper, 12... Disc rotor,
14... Piston, 16... Cylinder part, 18...
...Claw portion, 20...Connection portion, 24...Torque plate, 26...Slide pin, 42, 44...Pad.

Claims (1)

[Claims for Utility Model Registration] A support member fixed to a non-rotating member on one side of the disc rotor, a cylinder portion into which a piston is slidably fitted, and a cylinder portion in a direction parallel to the axis of the disc rotor. A slide pin is provided on the outer circumferential side of the disk rotor, and includes a claw portion facing the cylinder portion and a connecting portion connecting the cylinder portion and the claw portion, and a slide pin is attached to the support member in the cylinder portion. a caliper supported so as to be movable in a direction parallel to the axis of the disc rotor through the caliper; and a caliper disposed on both sides of the disc rotor inside the caliper, the disc rotor being supported by the piston and the pawl. A disc brake of a type comprising a pair of pads pressed on both sides of the caliper, the pads being immovable in the circumferential direction of the disc rotor and movable in a direction parallel to the axis of the disc rotor. By engaging the connecting portion of the caliper and bringing the support member into contact with the portion of the connecting portion of the caliper located between the pair of pads in the circumferential direction of the disc rotor, the braking torque applied to the caliper can be applied to the caliper. A disc brake characterized in that it is received substantially on the rotating surface of a disc rotor.