JPH0247775Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a disc brake, and particularly relates to a technique for suppressing drag of the brake.

Prior Art Each disc rotor has a back plate and is disposed to face both sides of the disc rotor, and at least one of the back plates has protrusions that protrude in the circumferential direction on both sides facing the circumferential direction of the disc rotor. a pair of pads fixed to a non-rotating member and having a guide surface facing a side surface of the protrusion that is perpendicular to the radial direction of the disc rotor; A disc brake is provided that includes a support member that guides the pad in a movable manner, and a spring that presses the protrusion of the pad against the guide surface to prevent the pad from rattling.

Problems to be Solved by the Invention However, in such disc brakes, if there is no means for returning the pads when not braking, the brakes may drag. For this reason, a spring such as a V-spring that constantly biases both pads in a direction to separate them from each other is provided between the pads, but this has the problem of increasing the number of parts and the number of work steps.

Means for Solving the Problems The present invention has been made against the background of the above-mentioned circumstances, and its gist is that in the above-described disc brake, the two disc brakes are pressed together by the spring. At least one of the guide surface and the side surface of the protrusion is provided with an inclined surface that inclines the pad so as to separate the inner or outer end surface of the pad from the disc rotor according to the pressing force of the spring. There is a particular thing.

Function: With this structure, the side surface of the protrusion springs when not braking due to the action of the inclined surface provided on at least one of the guide surface of the support member and the side surface of the protrusion of the pad, which are pressed against each other by the spring. When the pad is pressed against the guide surface according to the pressing force, the pad is inclined so that the inner or outer end of the pad is separated from the disk rotor.

Effects of the invention As a result, brake dragging can be effectively prevented without increasing the number of parts and work hours.

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

FIG. 4 is a diagram showing the main parts of a disc brake to which the present invention is applied, and 10 is a caliper disposed astride the outer periphery of the disc rotor 12. The caliper 10 includes a cylinder portion 16 into which a piston 14 is slidably fitted, and the cylinder portion 16.
It is provided with a claw portion 18 that integrally extends from the piston 14 and faces the piston 14 at a predetermined interval. This caliper 10, as shown in FIGS. 3 and 4,
A disk rotor 12 is attached to a torque plate 20 that is fixed to a non-rotating member (not shown) with bolts 19 or the like.
It is supported so as to be able to float in a direction parallel to the axis of the disk rotor 12 by a pair of slide pins 22 (only one of which is shown) that protrudes in a direction parallel to the axis of the disk rotor 12 . In this embodiment, the torque plate 2
0 constitutes a supporting member. Note that 23 is a sealing material that returns the piston 14 when the brake fluid pressure is released.

The torque plate 20 is formed from a single plate into a hook shape, and includes a pair of parallel parts 24 and 26 facing each other and disposed with the disc rotor 12 in between. Parallel part 2
4 and 26 are respectively opened in the outer circumferential direction of the disk rotor 12 and have pads 36 and 38, which will be described later.
Pad housing notches 28 and 30 that accommodate the
(only 28 is shown) is formed. A pair of notches 32 and 34 (only 32 is shown) extending in a direction away from each other is provided on both opposing side surfaces of these pad accommodation notches 28 and 30 and located on the inner peripheral side of the disk rotor 12, respectively. It is formed.

As shown in FIGS. 3 and 4, a pair of substantially rectangular pads 36 and 38 are provided inside the caliper 10, that is, between the piston 14 and the claw portion 18.
are arranged in the pad accommodation notches 28 and 30 with the disk rotor 12 sandwiched therebetween. The pads 36 and 38 consist of back metals 40 and 42 and friction materials 44 and 46 fixed to them,
Each side portion of the back plates 40 and 42 facing the circumferential direction of the disc rotor 12 and the disc rotor 1
As shown in FIG. 3, a pair of projections 48 and 50 (only 48 is shown) projecting a predetermined distance in the circumferential direction of the disc rotor 12 is provided at the inner end of the disc rotor 12, as shown in FIG. And those protrusions 4
8 and 50 are fitted into the notches 32 and 34, respectively, and an inner peripheral side wall surface 52 located on the inner peripheral side of the disc rotor 12 of the notches 32 and 34,
54 (only 52 is shown), and inner circumferential side surfaces 56, 58 of the protrusions 48, 50 on the inner circumferential side of the disk rotor 12 and facing the radial direction of the disk rotor 12.
(only 56 is shown), a spring 60 having a substantially U-shape as a whole is disposed with the tip of each leg facing toward the disk rotor 12. These springs 60 are each integrally provided with a rust prevention plate portion 70 extending a predetermined distance along both sides of the pad receiving notches 28, 30. Then, the inner peripheral side surfaces 56, 5 of each protrusion 48, 50
The outer circumferential side surfaces 62 and 64 (only 62 is shown) on the opposite side to the notches 32 and 34 are connected to the outer circumferential side wall surfaces 66 and 68 (only 66 shown) located on the outer circumferential side of the disc rotor 12 through the rust prevention plate part 70. Until the protrusions 48 and 50 come into contact with each other, the protrusions 48 and 50 are constantly urged in the direction away from the inner peripheral side wall surfaces 52 and 54, thereby preventing the pads 36 and 38 from wobbling in the radial direction of the disc rotor 12. is prevented. Therefore, in this embodiment, the outer circumferential side wall surfaces 66, 68, more precisely, the surfaces of the rust-proof plate portion 70 facing the inner circumferential side wall surfaces 52, 54 function as guide surfaces.

In this embodiment, the outer circumferential side wall surfaces 66, 68 are formed substantially parallel to the axis of the piston 14, and the outer circumferential side surfaces 62, 64 of the protrusions 48, 50 are formed as shown in FIG. As shown in FIG. 2, they are each formed to be inclined at a predetermined angle in a direction toward the axis of the disc rotor 12 as it approaches the disc rotor 12. These outer peripheral side surfaces 62 and 64 function as inclined surfaces in this embodiment. The predetermined angle is set so that the pads 36, 38 are adjusted according to the pressing force of the spring 60 to an extent that can effectively prevent the brake from dragging when not braking.
is determined so that it can be tilted.

In the disc brake configured as described above, when brake fluid pressure is supplied and the piston 14 is pushed out, one pad 36 is moved to the protrusion 48,
50, while being guided by the outer circumferential wall surfaces 66, 68 and the spring 60, is pressed against one surface of the disc rotor 12, as shown in FIG. The other pad 38 is moved in the opposite direction to the pad 36 by the claw portion 18.
Braking is performed by being guided and pressed against the other surface of the disc rotor 12 in the same manner as in the above case.

And when the brake fluid pressure is released,
Since the piston 14 is pushed back into the cylinder portion 16 by the return action of the seal member 23, the pad 36 has the outer circumferential side surfaces 62, 64 of the protrusions 48, 50 as shown in FIGS. The outer circumferential side surfaces 62 and 64 slide into contact with the outer circumferential side wall surfaces 66 and 68 according to the biasing force of the spring 60 until they come into contact with the outer circumferential side wall surfaces 66 and 68 via the rust prevention plate part 70 in a state substantially parallel to the outer circumferential side wall surfaces 66 and 68. While being made to do so, Patsudo 36
The outer circumferential end (upper end) of the disc rotor 12 is slightly inclined in the direction away from the disc rotor 12, while the upper end of the pad 38 is similarly inclined toward the direction away from the disc rotor 12.
2. Slightly tilted in a direction away from 2. Incidentally, in order to facilitate understanding, the slope is drawn largely in each figure.

As described above, according to the present embodiment, the outer circumferential side surfaces of the protrusions 48 and 50 are simply applied without requiring a spring such as a V spring that biases the pads 36 and 38 in the direction of separating them from each other as in the conventional case. By simply providing slopes on 62 and 64, the pad 3 can be easily adjusted when not braking.
Since contact between 6 and 38 and the disc rotor 12 is suppressed, brake drag can be effectively prevented without increasing the number of parts and the number of work steps.

In addition, in the above-mentioned embodiment, the protrusions 48, 5
Although the outer circumferential side walls 62 and 64 of the torque plate 20 are provided with inclined surfaces, it is not necessary, and the outer circumferential side wall surfaces 66 and 68 of the torque plate 20 may be provided with inclined surfaces, 64 and the outer circumferential side wall surfaces 66, 68, respectively, may be provided with inclined surfaces that cooperate with each other according to the pressing force of the spring 60 to incline the pads 36, 38 in a direction away from the disk rotor 12, respectively.

Further, in the above embodiment, the protrusions 48, 5
The outer circumferential side surfaces 62, 64 of 0 are sloped surfaces, and the outer circumferential wall surfaces 66, 68 of the notches 32, 34 are guide surfaces. Part 48, 50
inner peripheral side surfaces 56, 58 or notches 32, 34
The inner peripheral side wall surfaces 52 and 54 may be provided with inclined surfaces similar to those in the above-described embodiment.

Further, in the above embodiment, the protrusions 48, 50
are provided at the ends of the inner circumferential side of the disk rotor 12 on both sides of the pads 36 and 38 facing the circumferential direction of the disk rotor 12.
Alternatively, in cases where the sliding resistance between the side surface of the protrusion and the guide surface, which are pressed against each other by the spring, can be made relatively small, the side portions may be provided on the outer peripheral side. It is also possible to provide it in the middle part. The protrusions 48 and 50 are connected to the pad 36,
38, the direction of inclination of the inclined surface is opposite to the case of the above-described embodiment, and the direction of inclination of the inclined surface is such that the direction of inclination is such that the direction of inclination is such that it becomes further away from the axis of the disk rotor 12 as it approaches the disk rotor 12. It will be.

Further, in the above-described embodiment, the pads 36 and 38 are each supported by the torque plate 20 so as to be movable in a direction parallel to the axis of the disc rotor 12, but this does not necessarily have to be the case. , for example, the pad 38 is attached to the claw portion 1
By applying the present invention to the pad 36, the effects of the present invention can be obtained to some extent even in a type of disc brake fixed to the pad 8.

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

[Brief explanation of the drawing]

1 and 2 are sectional views taken along the line AA in FIG. 3, showing the states of the pads during non-braking and braking, respectively. FIG. 3 is a cross-sectional view taken from the side in FIG. 4, with some parts omitted. FIG. 4 is a sectional view showing the main parts of a disc brake to which the present invention is applied. 12: Disc rotor, 20: Torque plate, 40, 42: Back plate, 44, 46: Friction material, 4
8, 50: protrusion, 60: spring, 62, 6
4: Outer circumference side surface, 66, 68: Outer circumference side wall surface, 7
0: Rust prevention plate part.

Claims (1)

[Claims for Utility Model Registration] Disc rotors each have a back plate and are disposed opposite to each other on both sides of the disc rotor, and on at least one of the back plates,
a pair of pads having protrusions projecting in the circumferential direction formed on both side surfaces facing the circumferential direction of the disc rotor; and a side surface of the protrusions perpendicular to the radial direction of the disc rotor, the pads being fixed to a non-rotating member; a support member that has a guide surface facing the pad and guides the pad so as to be movable in a direction parallel to the axis of the disk rotor; A disc brake that includes a spring that prevents sticking, wherein at least one of the guide surface and the side surface of the protrusion that are pressed against each other by the spring,
A disc brake characterized in that the pad is provided with an inclined surface that tilts the pad so as to separate the inner or outer end of the pad from the disc rotor according to the pressing force of the spring.