JPH027300Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a disc brake, and more specifically to an improvement of a torque plate.

Prior Art In a disc brake, a pair of brake pads arranged facing the plate surface of a disc rotor are pressed against the disc rotor by a caliper, thereby suppressing the rotation of the disc rotor and thereby braking the wheels. It is becoming more and more common.
Torque from the rotor acts on the brake pads pressed against the disc rotor, but this torque is received by the torque plate. That is, such a disc brake has a torque plate fixed to a non-rotating member at the base end on the side near the axis of the disc rotor, and a torque receiving part of the torque plate is formed on the outer circumferential side of the rotor. The pad is accommodated in the pad accommodation recess, and the torque acting on the pad during braking is received by the inner wall surface (torque receiving portion) of the accommodation recess facing the side end surface of the pad. This torque receiving part also has a guiding function for the movement of the brake pad. The brake pads are moved toward the disc rotor during braking,
Furthermore, it is separated from the disc rotor when the brake is released. The torque receiving portion slides on the brake pad and guides its movement.

As described above, the torque plate has conventionally been formed of a thick plate material because it requires the function of receiving torque and the function of guiding the movement of the brake pad. When receiving torque, twisting, bending, etc. are applied to the torque plate, so
It is necessary to have enough rigidity and strength to withstand these, and also to be able to move and guide the brake pad in the plate pressure direction even if the relative position to the torque plate changes due to wear, and to have a width sufficient to receive the torque. (thickness) is required.

Problems to be Solved by the Invention However, if such a torque plate is formed from a thick plate material, the torque plate becomes heavier, and the material cost and manufacturing cost also increase accordingly.

Means for Solving the Problems The present invention has been made to solve such problems, and its gist is that the torque plate is connected to the first plate and the first plate is connected to the rotor. and a second plate having a short radial length, and the end of the first plate on the rotor axis side is fixed to the non-rotating member as a proximal end. forming the torque receiving portion by welding and joining a first plate in an overlapping state to a portion located on the outer peripheral side of the rotor;
and at least one of the inner wall surfaces of the first plate and the second plate facing the side end surface of the pad partially protrudes in a direction away from the overlapping surface along the axis of the rotor, A portion of the torque receiving portion is formed into a wide portion that is wide in the axial direction.

Operation and Effects of the Invention In this way, by configuring the torque plate with two plates, the first plate and the second plate, it is possible to reduce the thickness of each plate. Since one of these plates, the second plate, is shorter than the first plate, some parts of the torque plate are thinner than conventional integrally molded products, and the weight is accordingly reduced. is reduced. This also reduces costs.

On the other hand, in such a torque plate, the torque receiving part, which is susceptible to twisting and bending during braking, is made up of two plates, the first plate and the second plate, which are overlapped and firmly integrated by welding. Despite being lightweight, it has sufficient resistance to the above-mentioned torsional and bending forces.

In addition, in the disc brake of the present invention,
The torque plate has a part of the torque receiving part that guides the sliding of the brake pad as a wide part that extends in the axial direction of the disc rotor. Can be guided by sliding. In other words, sliding guidance can be provided over a wider range than the thickness of the torque plate. Conversely, it is possible to make the thickness of the torque plate thinner than the width required to guide the brake pads, which has the effect of further reducing the weight of the torque plate and, by extension, the disc brake. .

Embodiments Next, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, reference numeral 10 denotes a torque plate, which is fixed to a non-rotating member 18 at the base end 14 on the side near the axis of the disc rotor 12, with a part overlapping the dust cover 16, and also on the outer circumferential side of the rotor 12. A brake pad (inner pad) 22 and a caliper 24 are each supported movably in the axial direction of the rotor 12 at the torque receiving portion 20 located therein. That is, slide pins 26 are erected at both ends of the torque receiving portion 20 in a direction parallel to the rotor 12 (left-right direction in the figure).
The caliper 24 is slidably supported by 6,
In addition, a rectangular pad housing recess 28 is formed in the middle portion sandwiched between the slide pins 26, and the inner pad 22 is slidably housed therein. The accommodation recess 28 is formed so that its inner wall surface (torque receiving surface) 30 can slide into contact with the side end surface of the inner pad 22, and this inner wall surface 30 receives the torque acting on the pad 22, and also Guidance is now provided when moving.

As shown in FIG. 3, the caliper 24 has a cylinder portion 32, a claw portion 34, and an arm 36 extending parallel to the plate surface of the rotor 12. It is slidably fitted onto the slide pin 26. Cylinder part 3
2 is slidably fitted with a piston 38, and when the piston 38 is pushed out by the supply of brake fluid pressure to the cylinder portion 32, the inner pad 22 is fitted onto the inner wall surface 30 of the housing recess 28. The rotor 12 is pressed against the rotor 12 by sliding along the rotor 12. Also, due to the reaction force at this time, the claw portion 34 is moved in the opposite direction to the piston 38 (leftward in FIG. 3), and the other brake pad (outer pad) is moved.
40 is pressed against the rotor 12, thereby suppressing its rotation. Note that the outer pad 40 is provided with a protrusion 42 as shown in FIG.
is fitted into a fitting hole 44 formed in the claw portion 34, so that the torque acting on the outer pad 40 from the rotor 12 is transmitted to the claw portion 34. The torque transmitted to the claw portion 34 is transmitted to the torque plate 10 via the slide pin 26 and is received there.

As shown in FIG. 1, the torque plate 10 is composed of a first plate 46 and a second plate 48 whose length in the radial direction of the rotor 12 is shorter than the first plate 46. The second plate 48 is
The rotor 12 is overlapped with the first plate 46 on the outer peripheral side thereof, and is joined to the first plate 46 by resistance welding at a suitable number of locations. That is, in this example, the torque receiving part 20 is formed by the first plate 46 and the second plate 48, and the base end part 14, which becomes the part fixed to the non-rotating member 18, is formed by the first plate 46. It is being done. As shown in FIG. 5, bolt holes 50 are formed in the first plate 46, through which bolts for fixing the first plate 46 to the non-rotating member 18 are passed. As shown in FIGS. 4 and 5, matching bolt holes 52 are formed at the outer circumferential ends of each of the first plate 46 and the second plate 48, and the slide pins 26 are formed therein. A bolt is passed through. Rectangular cutouts 54 and 56 are formed in each of the first plate 46 and the second plate 48, and these cutouts 54 and 56 constitute the pad accommodation recess 28 in the torque plate 10. ing. A portion of these inner wall portions is shaped to protrude in a direction away from the mating surfaces of the first plate 46 and the second plate 48, respectively. That is, a portion of the torque receiving portion is a wide portion 58 that is wide in the axial direction of the rotor 12, that is, in the direction of movement of the inner pad 22.

In this way, in the disc brake of this example, the torque receiving part 20 of the torque plate 10, that is, only a part thereof is formed by the first plate 46 and the second plate 48, and the other base end part 18 is formed by the plate. It is formed only of the first plate 46, which is thin. For this reason, the weight of the torque plate 10 is reduced, contributing to the weight reduction of the vehicle, and as the weight of the torque plate 10 is reduced, there is an advantage that material costs are reduced.

On the other hand, in this torque plate 10, the torque receiving part 20, which is susceptible to twisting, bending, etc. during braking, is formed by the first plate 46 and the second plate 48, and is equivalent to the conventional integrated torque plate. It is given rigidity and has good resistance to the above-mentioned twisting, bending, etc. Moreover, the torque plate 10 of this example, which is composed of the first plate 46 and the second plate 48, has good workability in press working, welding, etc. for the first plate 46 and the second plate 48. (This is because the plate thickness is thin.) It has the advantage of being easy and inexpensive to manufacture.

In addition, in the disc brake of this example, the torque receiving portion of the torque plate 10 is partially connected to the inner pad 22.
Since the wide portion 58 is wide in the direction of movement of the torque plate 10, it has the advantage that the thickness of the torque plate 10 can be made thinner. This is because if the width necessary for guiding the movement of the inner pad 22 is secured by the wide portion 58, the thickness of the torque plate 10 itself can be made thinner. The advantage is that the plate 10, the disc brake, and the vehicle can be made lighter.

Although the embodiments of the present invention have been described above in detail, the present invention can also be implemented in other forms.

For example, the present invention can be applied to a disc brake with a floating caliper as described above, a disc brake with a fixed caliper, and a disc brake in a different state from the above embodiment. In addition to resistance welding, it is also possible to employ other methods for welding the second plate.

It is also possible to form the wide portion in the torque receiving portion of the torque plate by causing only one of the first plate and the second plate to protrude in a direction away from their mating surfaces.

In addition, the present invention can be implemented with various modifications based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a torque plate of a disc brake according to an embodiment of the present invention.
2 is a front view of the disc brake including the torque plate shown in FIG. 1. FIG. FIG. 3 is a cross-sectional view of a main part of the disc brake shown in FIG. 2, and FIGS. 4 and 5 show a second plate which is a component of the torque plate shown in FIGS. 1, 2, and 3, respectively. and a front view of the first plate. 10: Torque plate, 12: Disc rotor, 14: Base end, 18: Non-rotating member, 20: Torque receiver, 22: Inner pad, 28: Pad housing recess, 30: Inner wall surface, 40: Outer pad, 4
6: first plate, 48: second plate, 58:
Wide part.

Claims (1)

[Claims for Utility Model Registration] A housing recess for accommodating brake pads is formed in a torque receiving part that is fixed to a non-rotating member at the base end on the side near the axis of the disc rotor and located on the outer circumferential side of the rotor. A disc brake is provided with a torque plate, and an inner wall surface of the accommodation recess facing the side end surface of the pad slides in contact with the pad to guide the movement of the pad and serves as a torque receiving surface for receiving torque acting on the pad. wherein the torque plate is composed of a first plate and a second plate having a shorter length in the radial direction of the rotor than the first plate, and an end of the first plate on the rotor axis side is a proximal end. is fixed to the non-rotating member, and the second plate is welded and joined in an overlapping state to a portion of the first plate located on the outer peripheral side of the rotor to form the torque receiving portion, and the first plate is and at least one of the inner wall surfaces of the second plate facing the side end surface of the pad is partially protruded in a direction away from the overlapping surface along the axis of the rotor to form a part of the torque receiving surface. A disc brake characterized by having a wide portion that is wide in the axial direction.