JP2010002041A - Disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk brake device, which is suppressed in reduction of a contact area between a lining body and a disk rotor. <P>SOLUTION: In a piston opposed type disk brake device 1, inner and outer calipers 3, 5 are respectively provided with two or more pistons 11. The disk brake device includes: a guide plate 27 provided with a plurality of lining holding holes 21, 22, 23 formed to penetrate corresponding to the piston disposition of each caliper 3, 5 and fixed to the respective calipers 3, 5; lining holding springs 31, 32, 33 slidably fitted and held on the inner peripheries of the lining holding holes 21, 22, 23; and linings 15, 16, 17 held by the lining holding springs 31, 32, 33. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, an inner caliper portion and an outer caliper portion facing each other across the disk rotor each have a cylinder, and a piston facing type that obtains a braking force by pressing a lining against the disk rotor with a piston mounted on each cylinder. The present invention relates to a disc brake device.

12 and 13 show a conventional example of a piston-facing disk brake device.
The disc brake device 100 shown here is disclosed in Patent Document 1 below, and each of an inner caliper 103 and an outer caliper 104 facing each other across a disc rotor 101 that rotates integrally with a wheel has two cylinders 106. Have. The disc brake device 100 presses the inner and outer linings 111 and 113 against the disc rotor 101 by the pistons 108 attached to the cylinders 106 to obtain a braking force.

  Each of the linings 111 and 113 has a pressure plate 111b and 113b that receives a pressing force from the two pistons 108 on the back surface of the integrally structured lining body 111a and 113a whose surface is pressed against the disk rotor 101 by an adhesive. With the fixed structure, the pressure plates 111b and 113b are supported by the caliper guide mechanisms so as to be able to advance and retract toward the disk rotor 101.

Japanese Patent Laid-Open No. 5-106661

  However, as in the conventional example described above, when the inner side and outer side linings 111 and 113 use the lining main bodies 111a and 113a having an integral structure, the lining main bodies 111a and 113a themselves are increased in size. Even when pressed by a single piston 108, it is difficult to maintain the uniformity of the surface pressure of the sliding surface due to unevenness and thermal deformation of the sliding surface of the disk rotor 101. As a result, the lining bodies 111a and 113a and the disk rotor There is a possibility that the contact area with 101 is reduced and the braking performance is lowered due to the reduction of the contact area.

  Further, in the disc brake device 100 having the structure in which the linings 111 and 113 are slidably attached to the carriers 103 and 104 as described above, in order to prevent the lining from being dragged at the time of non-braking, the disc is released when the braking is released. A return spring mechanism for pulling back each lining 111, 113 in a direction away from the rotor 101 must be incorporated between each carrier 103, 104 and each lining 111, 113, and for that purpose, a dedicated return spring mechanism is incorporated. If time and effort are required, there is a risk of degrading the assembly of the brake device.

  Further, in recent years, the used linings 111 and 113 are required to separate and recover the lining bodies 111a and 113a and the pressure plates 111b and 113b in order to recycle resources. In the configuration in which the pressure plates 111b and 113b are fixed to the back surfaces of the 111a and 113a with an adhesive, it is difficult to separate the lining body and the pressure plate, which causes an obstacle to recycling.

  An object of the present invention is to solve the above-mentioned problems, and a disc brake capable of preventing a reduction in braking performance due to a reduction in the contact area between the lining body and the disc rotor due to unevenness or thermal deformation of the sliding surface of the disc rotor. It is another object of the present invention to provide a disc brake device that can prevent the occurrence of dragging without causing deterioration in assemblability and that can easily recycle the lining.

The above object is achieved by the following configuration.
(1) In the disc brake device according to the present invention, each of the inner caliper portion and the outer caliper portion has two or more cylinders, and the lining is pressed against the disc rotor by a piston mounted on each of the cylinders, thereby applying a braking force. A piston-opposed disc brake,
A plurality of lining retaining holes formed through the guide plate fixed to each caliper;
A plurality of lining holding springs that are curved and formed in a substantially ring shape along the inner periphery of each lining holding hole of each guide plate, and are fitted and held slidably in the penetrating direction of each lining holding hole;
A plurality of linings held by the lining holding spring;
The lining holding spring has a width dimension obtained by adding the movement of the lining during a braking operation to the thickness of the guide plate in the hole.

  (2) Further, in the disc brake device according to the above (1), the lining holding spring contacts the surface of the guide plate facing the disc rotor side to regulate the retreat position of the lining holding spring. A regulating claw, an advancing regulating claw that abuts against the back surface of the guide plate to regulate the advancing position of the lining holding spring, and the retraction regulating claw that returns to a position that abuts on the surface of the guide plate when braking is released. A return spring claw for pressing the back surface of the guide plate is integrally formed.

  (3) Further, in the disc brake device according to the above (1) or (2), the lining holding spring is fitted so that the lining can be advanced and retracted.

  (4) Further, in the disc brake device according to (1) to (3), each lining attached to the lining holding hole of each guide plate has a lining body whose surface is pressed against the disc rotor, and the lining body And a reinforcing plate that is fitted and held on the back surface of the plate and receives a pressing force from the piston.

In the disc brake device described above, at the time of braking, each lining that receives a pressing force from the piston is integrated with a lining holding spring that holds the lining on the lining holding hole of the guide plate fixed to the caliper. Is moved to the disk rotor side and pressed by the disk rotor to generate a braking force.
And the lining pressed by the disc rotor is a small one that is independent for each of the plurality of pistons mounted on the caliper, and since each piston is pressed by the disc rotor, it is integrated with a plurality of pistons. Compared with a conventional disc brake device that presses the lining body against the disc rotor, it is possible to prevent the contact area between the lining body and the disc rotor from being reduced due to unevenness or thermal deformation of the sliding surface of the disc rotor. Thus, it is possible to prevent a reduction in braking performance due to a reduction in contact area.
In addition, the lining holding spring that holds the lining body of the guide plate has a width dimension that is the thickness of the guide plate plus the amount of movement of the lining during braking operation. Therefore, it is possible to prevent the outer peripheral portion of the lining body from rubbing against the guide plate, so that the outer peripheral surface of the lining main body is not damaged by rubbing with the guide plate, and damage due to the outer peripheral surface of the lining main body can be prevented. it can.

Hereinafter, preferred embodiments of a disc brake device according to the present invention will be described in detail with reference to the drawings.
1 is a perspective view of an embodiment of a piston-facing disc brake device according to the present invention as viewed obliquely from above, FIG. 2 is a view taken along arrow A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a perspective view from the back side of the inner side lining assembly shown in FIG. 1, FIG. 5 is a side view of the lining assembly shown in FIG. 4, and FIG. 6 is a side view of the lining assembly shown in FIG. 7 is a rear view of the lining assembly shown in FIG. 4, and FIG. 8 is an exploded perspective view of the lining assembly shown in FIG. 9A is a perspective view from the front side of the second lining body shown in FIG. 8, FIG. 9B is a perspective view from the back side of the lining body, and FIG. FIG. 10B is a front view of the lining holding spring shown in FIG. 8, FIG. 10C is a front view of the lining holding spring, and FIG. FIG. 11 is a view on arrow E in FIG. FIG. 11 is an explanatory diagram of the position of the lining holding spring with respect to the guide plate in the lining assembly, where (a) is an initial position, (b) is a position during braking, and (c) is an explanatory diagram of a position when returning. is there.

The disc brake device 1 according to this embodiment is a so-called piston-facing disc brake device, and each of the inner caliper portion 3 and the outer caliper portion 5 facing each other across a disc rotor (not shown) has three cylinders 7. Then, the inner and outer lining assemblies 13 are moved to the disk rotor side by the pistons 11 mounted on the respective cylinders 7, and the linings 15, 16, and 17 on each lining assembly 13 are used as the disk rotors. Press to obtain braking force.
The three cylinders 7 provided in the calipers 3 and 5 are spaced apart from each other in the circumferential direction of the disk rotor.

  As shown in FIGS. 4 to 8, each of the inner side and outer side lining assemblies 13 has three lining holding holes 21, 22, and 23 penetratingly formed corresponding to the piston arrangement of each caliper 3, 5. The guide plate 27 fixed to the inner and outer calipers 3 and 5 by bolts 25, and the lining holding springs 31 fitted and held in the lining holding holes 21, 22, and 23 of the guide plates 27, 32, 33 and linings 15, 16, 17 held by the lining holding springs 31, 32, 33 are provided.

The lining holding springs 31, 32, 33 are formed by bending a belt-like plate material into a substantially ring shape along the inner periphery of each lining holding hole for each lining holding hole 21, 22, 23 of each guide plate 27. Thus, the lining holding holes 21, 22, and 23 are fitted and held so as to be slidable in the penetration direction of the holes.
Further, as shown in FIGS. 8 and 10 (b), the lining holding springs 31, 32, and 33 have separation portions 31a, 32a, and 33a that are partially separated, and the separation portions 31a, By having 32a and 33a, elastic deformation is possible in the diameter reducing direction and the diameter increasing direction.

  Each of the lining holding springs 31, 32, 33 is in contact with the surface 27a of the guide plate 27 facing the disc rotor side, and a retraction restricting claw (regulating member) 41 that restricts the retreat position of the linings 15, 16, 17; An advancing regulation claw that abuts against the back surface 27b of the guide plate 27 and regulates the maximum advancing position of the lining holding springs 31, 32, 33 when sliding inside the lining holding holes 21, 22, 23 toward the disk rotor during braking. A (regulating member) 43 and a return spring claw 45 that presses the back surface 27b of the guide plate 27 so as to return to a position where the retraction regulating claw 41 contacts the front surface 27a of the guide plate 27 when braking is released are integrally formed. .

The retraction restricting claw 41, the advance restricting claw 43, and the return spring claw 45 are formed by bending a protruding piece formed on both side edges of the belt-like plate material.
The width dimension W1 (see FIG. 10C) between the retraction restricting claw 41 and the advance restricting claw 43 is equal to the thickness t (see FIG. 8) of the guide plate 27, and the linings 15, 16, It is set to a value obtained by adding 17 movement s (see FIG. 11).
That is, W1 = t + s.

  As shown by the arrow X in FIG. 10B, the lining holding springs 31, 32, and 33 of the present embodiment are biased inwardly on the side of the separating portions 31a, 32a, and 33a to reduce the diameter. When the guide plate 27 is inserted into the lining holding holes 21, 22, and 23 and the reduced diameter state is released in that state, the retraction restricting claw 41 and the return spring claw 45 in each spring pinch the peripheral edge of the lining holding hole. In this state, the lining holding holes 21, 22 and 23 are held so as not to fall off.

When the lining holding springs 31, 32, 33 are mounted in the lining holding holes 21, 22, 23, and the linings 15, 16, 17 are fitted and mounted inside the lining holding springs 31, 32, 33, The lining holding springs 31, 32, 33 hold the linings 15, 16, 17 by the fitting friction force, and as a result, the linings 15, 16, 17 are held in the lining holding holes 21, 22, 23. become.
Further, the lining holding springs 31, 32, 33 are fitted so that the linings 15, 16, 17 can be advanced and retracted, and when the linings 15, 16, 17 are worn, the lining holding springs 31, 32, 33 are moved. Against the wear so that it can advance.

  In the initial state in which the linings 15, 16, and 17 are attached to the guide plate 27 via the lining holding springs 31, 32, and 33, the lining holding springs 31, 32, and 33 are moved backward by the urging force of the return spring pawl 45. 41 is brought into contact with the front surface 27a of the guide plate 27 to the maximum retracted position, and as shown in FIG. 11A, a clearance s is secured between the advancement restricting claw 43 and the back surface 27b. Has been.

  The belt-like plate material used for the lining holding springs 31, 32, 33 is preferably one having excellent spring characteristics, and for example, a spring steel plate, a stainless steel plate, a phosphor bronze plate, or the like is used.

  Further, as shown in FIG. 8, the linings 15, 16, and 17 in the present embodiment include lining bodies 15a, 16a, and 17a whose surfaces are pressed against the disk rotor, and the lining bodies 15a, 16a, and 17a. It is composed of reinforcing plates 15b, 16b, and 17b that are fitted and held on the back surface and receive a pressing force from the piston 11.

As shown in FIGS. 7 and 9 (b), the lining bodies 15a, 16a, and 17a are formed with recesses 15c, 16c, and 17c into which the reinforcing plates 15b, 16b, and 17b are fitted.
The reinforcing plates 15b, 16b, and 17b are integrated with the lining bodies 15a, 16a, and 17a by fitting into the recesses 15c, 16c, and 17c.

In the disc brake device 1 described above, at the time of braking, the linings 15, 16, 17 that have received a pressing force from the piston 11 supported by the caliper are lining holding springs that hold the linings 15, 16, 17. The sliding movement of the guide plate 27, which is fixed to the caliper, on the lining holding holes 21, 22, and 23 to the disk rotor side, and is pressed by the disk rotor to generate a braking force. To do.
When braking, when the lining holding springs 31, 32, 33 are moved to the disk rotor side as much as possible, the advancement restricting pawl 43 comes into contact with the back surface 27b of the guide plate 27 as shown in FIG. The gap s between the restricting claw 43 and the back surface 27b is eliminated.

  As the linings 15, 16, and 17 held by the lining holding springs 31, 32, and 33 are further worn, the lining holding springs 31, 32, and 33 themselves are subject to advance restriction by the advance restriction claw 43. As described above, since it is fitted to the lining holding springs 31, 32, 33 so as to be able to advance and retreat, the lining holding springs 31, 32, 33 can advance by the amount of wear.

  In the disc brake device 1 configured as described above, the linings 15, 16, and 17 pressed by the disc rotor are small and independent for each of the plurality of pistons 11 provided in the caliper. Compared with a conventional disc brake device that presses one integrated lining body against a disc rotor by a plurality of pistons, the lining bodies 15a and 16a are caused by unevenness and thermal deformation of the sliding surface of the disc rotor. , 17a and the disk rotor can be prevented from being reduced, so that a reduction in braking performance due to a reduction in the contact area can be prevented.

  Further, the lining holding springs 31, 32, 33 for holding the lining bodies 15a, 16a, 17a in the lining holding holes 21, 22, 23 of the guide plate 27 are set to the plate thickness t of the guide plate 27 during the braking operation. Since the width dimension W1 obtained by adding the moving amount s of the linings 15, 16, and 17 is provided, the outer peripheral portions of the lining bodies 15a, 16a, and 17a are guided by the guide plate when the lining bodies 15a, 16a, and 17a are moved during braking. 27, so that the outer peripheral surfaces of the lining main bodies 15a, 16a, and 17a are not damaged by rubbing with the guide plate 27, and the outer peripheral surfaces of the lining main bodies 15a, 16a, and 17a are prevented from being damaged. be able to.

Further, in the disc brake device 1, when the lining holding springs 31, 32, 33 are moved together with the lining main bodies 15 a, 16 a, 17 a to the disc rotor side during braking, the return spring pawl 45 has the back surface 27 b of the guide plate 27. When the brake is released, the lining holding springs 31, 32, 33 hold the lining bodies 15 a, 16 a, 17 a and pull away from the disk rotor when the brake is released. Thus, as shown in FIG. 11C, the clearance s is returned to the state in which the clearance s is secured between the advance restriction claw 43 and the back surface 27 b of the guide plate 27.
Therefore, it is possible to prevent the occurrence of dragging in which the lining bodies 15a, 16a, and 17a come into contact with the disk rotor during non-braking.

The return spring pawl 45 that pulls the lining bodies 15a, 16a, and 17a away from the disk rotor when the brake is released is used to hold the lining bodies 15a, 16a, and 17a in the lining holding holes 21, 22, and 23. Since it is integrally formed with the lining holding springs 31, 32, and 33 attached to 22 and 23, the number of parts is not increased. Further, the lining holding springs 31, 32, 33 are formed by bending a band-shaped plate material into a substantially ring shape along the inner circumference of the lining holding holes 21, 22, 23, and as described above, are elastic in the diameter reducing direction. After being inserted into the lining holding holes 21, 22, and 23 in a deformed state, the elastic deformation in the reduced diameter direction is released, so that the guide plate 27 can be easily mounted.
That is, the provision of the spring pawl 45 does not cause an increase in parts or an increase in the assembly process, which are factors that cause a decrease in assemblability. Therefore, the occurrence of drag can be prevented without causing deterioration in assemblability.

  Further, in the disc brake device 1, the reinforcing plates 15b, 16b, and 17b that are attached to the back surfaces of the lining main bodies 15a, 16a, and 17a and receive the pressing force from the piston 11 are recessed on the back surfaces of the lining main bodies 15a, 16a, and 17a. 15c, 16c, and 17c are fitted and held so that the used linings 15, 16, and 17 can be relatively easily separated into the lining bodies 15a, 16a, and 17a and the reinforcing plates 15b, 16b, and 17b, Recycling of the linings 15, 16, 17 is also facilitated.

The disc brake device 1 shown in the above embodiment is a piston-facing disc brake device having three cylinders 7 in each of the inner caliper portion 3 and the outer caliper portion 5. However, the number of cylinders equipped in each caliper is not limited to the above embodiment.
That is, in the piston-facing disc brake device according to the present invention, the number of cylinders provided in each caliper can be set to an arbitrary number, and each cylinder can be independently set according to the number of cylinders. Equipped with a lining.

It is the perspective view seen from the slanting upper part of the disc brake device concerning one embodiment of the present invention. It is A arrow directional view of FIG. It is BB sectional drawing of FIG. It is a perspective view from the back surface side of the inner side lining assembly shown in FIG. FIG. 5 is a side view of the lining assembly shown in FIG. 4. It is a front view of the lining assembly shown in FIG. It is a reverse view of the lining assembly shown in FIG. FIG. 5 is an exploded perspective view of the lining assembly shown in FIG. 4. (A) is a perspective view from the front side of the 2nd lining main body shown in FIG. 8, (b) is a perspective view from the back surface side of the lining main body. (A) is a perspective view of the second lining holding spring shown in FIG. 8, (b) is a front view of the lining holding spring, (c) is a view taken along arrow D in (b), and (d) is (b) FIG. FIG. 4 is an explanatory diagram of a position of a lining holding spring with respect to a guide plate in the lining assembly, where (a) is an initial position, (b) is a position during braking, and (c) is an explanatory diagram of a position when returning. It is a partially broken plan view of a conventional piston-facing disc brake device. FIG. 13 is a side view of the disc brake device shown in FIG. 12.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc brake device 3 Inner caliper part 5 Outer caliper part 7 Cylinder 11 Piston 13 Lining assembly 15, 16, 17 Lining 15a, 16a, 17a Lining main body 15b, 16b, 17b Reinforcement board 15c, 16c, 17c Recessed part 21,22 23 Lining holding hole 31, 32, 33 Lining holding spring 31a, 32a, 33a Spacing part 41 Retraction restricting claw (regulating member)
43 Advance restriction claw (regulation member)
45 Return spring claw

Claims (4)

Each of the inner caliper portion and the outer caliper portion has two or more cylinders, and is a piston-facing disc brake that obtains a braking force by pressing the lining against the disc rotor with pistons mounted on the respective cylinders,
A plurality of lining retaining holes formed through the guide plate fixed to each caliper;
A plurality of lining holding springs that are curved and formed in a substantially ring shape along the inner periphery of each lining holding hole of each guide plate, and are fitted and held slidably in the penetrating direction of each lining holding hole;
A plurality of linings held by the lining holding spring;
The disc brake device according to claim 1, wherein the lining holding spring has a width dimension obtained by adding a moving amount of the lining during a braking operation to a thickness of the guide plate.   The lining holding spring is in contact with the surface of the guide plate facing the disk rotor side to restrict the retreat position of the lining holding spring, and the lining holding spring is in contact with the back surface of the guide plate. The advance restriction pawl for restricting the advance position of the guide plate and the return spring pawl that presses the back surface of the guide plate so that the reverse restriction pawl returns to the position where it abuts against the surface of the guide plate when the brake is released are integrally formed. The disc brake device according to claim 1, wherein   The disc brake device according to claim 1 or 2, wherein the lining holding spring is fitted so that the lining can be moved forward and backward.   The lining fitted and held in the lining holding hole of each guide plate is composed of a lining body whose surface is pressed by the disk rotor, and a reinforcing plate which is held on the back surface of the lining body and receives a pressing force from the piston. The disc brake device according to any one of claims 1 to 3, wherein the disc brake device is configured.

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