JP2000130478A - Caliper assembly body and disc brake device furnished with caliper assembly body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify assembling work and to stabilize braking performance by providing a stepped part to prevent falling by being engaged with on one end in a state to temporarily assembling a pad spring to position a brake pad and to prevent rattling. SOLUTION: A spring 9 is pushed in against elastic force of tongue pieces 9a, 9b in the cross direction until it becomes horizontal around an inner side engagement piece 9c of the spring 9 by diagonally inserting the pad spring 9 between an adjustor bolt 2a of a pad pressing means 2 and a reaction force receiving part 5 each other on a caliper assembly body 1 before connecting a torque receiving member 7 through a slide guide mechanism 10. Thereafter, an outer side engagement piece 9d is engaged with a stepped part 6 by moving the spring 9 toward the reaction receiving part 5. Both ends of the spring 9 are supported on the engagement pieces 9c, d and they do not easily fall even in a temporarily assembled state. Consequently, it is possible to effectuate assembly work, to easily handle the spring 9 as it is flat and to secure stable braking performance for a long period of time as no unbalanced load is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake device (particularly, a fist type pin slide type), which is intended to improve the workability of assembling the brake device and to stabilize the braking performance.

[0002]

2. Description of the Related Art A disk brake device is constructed so that a disk rotor that rotates together with a rotating body is braked by clamping a disk rotor from both sides in the axial direction of a disk rotor by a pair of brake pads. For example, a disc brake device having a structure disclosed in Japanese Patent Application Laid-Open No. 52-9771 is known.

[0003]

In this type of brake device, as shown in FIGS. 8 and 9, a brake is applied by the elastic force of a piece extending from a base to both circumferential sides of a disk rotor (brake disk 27). Pads (friction pads 28, 2
9) simultaneously presses the outer central protrusions to guide the guide rails 31 of the torque receiving member (brake bracket 30).
32 is provided with a pad spring (leaf spring 33) for elastically attaching a brake pad (friction pads 28, 29).

The pad spring (leaf spring 33)
In a temporarily assembled state in which the caliper body (brake caliper 34) is engaged with a caliper assembly having a pad pressing member (operating piston 35) built in, the pad spring (leaf spring 3) is engaged.
While one end of 3) abuts on the reaction force receiving portion (left arm portion 36) of the caliper body (brake caliper 34), an elastic piece P extending radially outward of the disk rotor (brake disk 27) from an intermediate portion thereof. Is attached to the side wall of a peephole (abrasion state inspection peephole 37) of the caliper body (brake caliper 34), thereby preventing the pad spring (leaf spring 33) from accidentally falling off. The efficiency of the assembly of the brake device was improved.

In the conventional pad spring (leaf spring 33), a repetitive load along the axial direction of the disk rotor (brake disk 27) and a brake pad (friction pads 28, 2) are applied to the elastic piece P every time the brake is actuated.
Since the micro-vibration from 9) is applied, it is difficult to maintain its function stably for a long period of time, and the reliability is poor.
The point of force (the contact point between the elastic piece P and the peephole (the peephole 37 for checking the abrasion condition)) and the point of application (pad spring (leaf spring 33) and brake pad (friction pads 28, 29))
Of the elastic piece P
Is applied to the brake pads (abrasion pads 28 and 29) separately from the pressing force due to the elastic force of the piece of the pad spring (leaf spring 33) extending on both circumferential sides of the disk rotor (brake disk 27). If it is not stable, and if it is handled as a single component, the elastic piece P
However, it is difficult to stack them because of the presence of such a structure, and it is difficult to handle them.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a new caliper assembly which has a stable braking performance and can provide an even pressing force to both brake pads, and a disc brake device provided with the same. There is a suggestion.

[0007]

SUMMARY OF THE INVENTION The present invention provides a caliper assembly comprising an actuator portion having pad pressing means for pressing a brake pad, and a reaction force receiving portion integrally connected to the actuator portion via a bridging portion. In addition, this caliper assembly has a step portion that locks one end of the pad spring to prevent accidental dropping in a state where the pad spring for positioning the brake pad and preventing rattling is temporarily assembled. It has a feature, and the step portion is provided in a reaction force receiving portion of the caliper assembly.

Further, the present invention has a torque receiving member, brake pads movably supported by the torque receiving member and arranged on both sides of a disk rotor, and pad pressing means adjacent to one of the brake pads. A caliper assembly having an actuator portion and a reaction force receiving portion adjacent to the other of the brake pads integrally connected to the actuator portion via a bridging portion and connected to a torque receiving member via a slide guide mechanism; A pad spring that straddles between the pads and presses against the axis of the disk rotor at the outer peripheral end thereof to position each brake pad and prevent rattling, and one of the brake pads is directed toward the disk rotor by pad pressing means. Pressing and the reaction of the caliper assembly accompanying it causes the reaction force receiving part to In the disc brake device in which the brake pad is pressed toward the disc rotor and the disc rotor is sandwiched between the brake pads on both sides, the caliper assembly locks one end of the pad spring when the pad spring is temporarily assembled. The caliper assembly is characterized in that it has a step portion for preventing the accidental falling off, and the step portion is provided in a reaction force receiving portion of the caliper assembly.

[0009] The pad spring is provided with locking means for restricting its careless movement. As the locking means, the end of the tongue piece protruding along the circumferential direction of the disk rotor of the pad spring engages with the inner wall surface of the bridging portion to prevent misalignment due to inadvertent movement from the installation position. An end of the pad spring in the axial direction of the disk rotor is engaged with the reaction force receiving portion or the bridging portion, thereby restricting displacement due to inadvertent movement from the installation position.

For the present invention, the pad spring is particularly advantageously adapted to a leaf spring or a wire spring.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a step portion is provided in a caliper assembly, particularly a reaction force receiving portion, and one end of the pad spring is engaged with the step portion when the pad spring is temporarily assembled. Even if there is no elastic piece peculiar to the pad spring as described above, the pad spring does not easily fall off from the caliper assembly in the temporary assembly state. In addition, since the pad spring is flat, no uneven load is applied to the pad spring, so that stable braking performance can be secured for a long period of time. Further, since the springs can be stacked alone, handling becomes easy.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 is a plan view of a disc brake device incorporating a caliper assembly according to the present invention, FIG. 2 is a cross-sectional side view of a part of FIG. 1, and FIG. 2 shows a section taken along the line II-II, and FIG. 4 shows a section taken along the line III-III of FIG. In the drawing, reference numeral 1 denotes a caliper assembly according to the present invention. The caliper assembly 1 is integrated with an actuator portion 3 having pad pressing means 2 for pressing a brake pad, which will be described later, via a bridging portion 4 with the actuator portion 3. The reaction force receiving portion 5 is connected.

Reference numeral 6 denotes a step provided on the reaction force receiving portion 5.
, 7 is a torque receiving member, 8a and 8b are torque receiving members
7 movably supported by a disk rotor (shown by a two-dot chain line)
Brake pads located on both sides of
The brake pads 8a (inner pads), 8b
(Outer pad) is back plate b₁, B
_TwoHaving. 9 is a plan view as shown in FIGS.
This is a pad spring that
Along the width direction (the circumferential direction of the disk rotor)
Extending width direction tongue pieces 9a, 9b and inner side, outer
Side locking pieces 9c, 9d, and brake pads 8a,
Disc brake at the outer edge of the brake pad
To the brake pad 8a, 8b
Of the torque receiving member 7
Prevent rattle (Rattle means that the brake pad
A state in which rattling occurs on the luk receiving member and a striking sound is emitted
U). The torque receiving member 7 is fixed to, for example, a chassis of a vehicle body.
Fixed brake pads 8a, 8b
Can be displaced in the axial direction of the
Are to be restrained and supported.

Reference numeral 10 denotes a slide guide mechanism for moving the caliper assembly 1 relative to the torque receiving member 7 along the axis of the disk rotor. The slide guide mechanism 10 is embedded in the torque receiving member 7. Bush 1 which surrounds the guide pins 11 and 12 and the shafts of the guide pins 11 and 12 and whose outer surface fits through holes formed in the caliper assembly 1 and is slidable therebetween.
Caps 15 and 16 cover the through holes formed in the caliper assembly 1 on the head sides of the guide pins 11 and 12 and prevent the foreign substances from entering the slide portion.

The disk rotor is disposed between the brake pads 8a and 8b as shown by a two-dot chain line in FIG. 2 and is mounted on a rotating body to be braked (for example, an axle) and rotates with this rotating body. By sandwiching the disk rotor between the brake pads 8a and 8b, a braking force is applied to the rotating body.

The pad pressing means 2 of the actuator section 3 of the caliper assembly 1 has
a and adjuster bolt 2a impinging the back plate b ₁ of the adjuster nut 2c, incorporated slidably in the bushing 2b which is fixed screwed to the opening of the actuator unit 3, the adjuster upon release of the braking force Return spring 2 for restoring bolt 2a to initial position
d, a washer 2e interposed between the flange portion f formed integrally with the adjuster nut 2c and the return spring 2d, a cap 2f covering the nut 2c at the rear end of the adjuster bolt 2a, and an eccentric cam portion 2g. When the air chamber 17 is operated and the brake operation rod 17a presses the cam lever 18 forming the eccentric cam portion 2g, a rotational force is given to the eccentric cam 19 also forming the eccentric cam portion 2g, and the adjuster is adjusted according to the amount of eccentricity. The bolt 2a is pressed against the brake pad 8a together with the adjuster nut 2c. At the same time, the cappari assembly 1 is
Move along the guide pins 11 and 12, and press the brake pad 8b toward the disk rotor at the reaction force receiving portion 5 with the same force as the brake pad 8a. Although the main members have been described in FIGS. 1 to 4, reference numerals 1 a denote a caliper body, 20 denotes a pin provided between the tips of the cam lever 18, and 21 denotes a pin 2.
A sleeve as an eccentric cam operating member rotatably fitted to 0, 22 is a fixed anchor, 23 is a needle roller bearing interposed between the cylindrical outer peripheral surface of the eccentric cam 19 and the fixed anchor 22, and 24 is a fixed anchor 22 Caliper body 1a
It is a connection bolt for connecting to.

The pad spring is assembled in the following manner when the disk brake device having the above-described structure is assembled. First, the caliper assembly 1 before the torque receiving member 7 is connected via the slide guide mechanism 10.
6A, the pad spring 9 is inserted obliquely from between the adjuster bolt 2a of the pad pressing means 2 and the reaction force receiving portion 5 as shown in FIG.

As shown in FIGS. 6 (b) and 6 (c), the elasticity of the width direction tongue pieces 9a and 9b is set until the pad spring 9 becomes horizontal with the inner side locking piece 9c of the pad spring 9 as a fulcrum. Push against force. Then, FIG.
As shown in (d), the pad spring 9 is moved to the reaction force receiving portion 5.
And the outer side engaging piece 9d is
To be engaged.

FIG. 6D shows a state in which the pad spring 9 is temporarily assembled to the cappari assembly 1. Both ends of the pad spring 9 are provided with an inner locking piece 9c and an outer locking piece 9d. , And does not easily fall off even in the temporary assembly state.

After the pad spring 9 is temporarily assembled, the caliper assembly 1 and the torque receiving member 7 are connected via the slide guide mechanism 10 in that state. Next, brake pad 8
a, 8b of their respective backplate b _1, b ₂
At the same time, the protrusions t ₁ and t ₂ at the tops of the back plates b ₁ and b ₂ of the brake pads 8 a and 8 b are inserted into the disc rotor escape grooves of the torque receiving member 5, and the pad springs 9 as shown in FIGS. After contacting the base, the brake pads 8a, 8b are respectively moved along the axial direction of the disk rotor against the elastic force of the pad spring 9 so that the brake pads 8a, 8b are put on the rails of the torque receiving member 7. To complete the integration.

When the assembly is completed, the pad spring 9
End, i.e., the inner locking pieces 9c, outer locking pieces 9d back plate b _1, b ₂ of the protruding portion t _1, t of
₂ , the outer peripheral surface of the adjuster bolt 2a and the stepped portion 6 do not come into contact with each other.

In the present invention, as shown in FIG. 3, for example, a concave portion 25 can be formed on the inner wall surface of the bridging portion 4.
Here, the width direction tongue pieces 9a and 9b of the pad spring 9 are inserted and used as locking means, so that the brake pad 8
The initial position of the spring 9 is not easily shifted even if a force is applied to the a and 8b so as to rotate together with the disk rotor, or a force is applied along the rotation axis of the disk rotor. Absent.

When the stepped portion 6 is provided on the reaction force receiving portion 5, the outer side locking piece 9 of the pad spring 9 is provided on the side surface thereof.
b to restrict the movement of the b in the width direction (FIG. 1, FIG.
4), and this is used as the locking means, so that the end of the pad spring 9, especially the outer side locking piece 9 is formed.
Inadvertent movement in d can also be prevented, and the braking ability of the disc brake can be stabilized.

As the locking means of the pad spring 9, the above-mentioned concave portion 25 or the side wall 26 can be provided independently, but these locking means may be combined. In this respect, in the present invention, It is not particularly limited.

Although the pad spring 9 has a plate shape as shown in FIGS. 5A and 5B, in the present invention, the pad spring 9 has a linear shape as shown in FIGS. 7A and 7B. What processed the member (wire spring) can also be applied.

The type of the disc brake device applicable to the present invention may be a hydraulically actuated disc brake device, that is, a type in which a pad spring is disposed between a bridge portion of a caliper and a brake pad. I just need.

Regarding the procedure for assembling the disc brake device, the torque receiving member may be first attached to a stationary member of the vehicle, then the brake pad may be mounted on the member, and then the caliper assembly may be assembled. It is not limited to the above-mentioned point.

[0028]

In the caliper assembly 1 according to the first aspect of the present invention, when the pad spring 9 is temporarily assembled, the stepped portion 6 for receiving one end of the spring 9 is provided. Even in the assembled state, it does not easily fall off, and the efficiency of the assembling work can be improved. Further, since the pad spring 9 can be a flat one, the handling of the members is easy.

In the caliper assembly 1 according to the second aspect of the present invention, the step portion 6 for receiving one end of the pad spring 9 is provided in the reaction force receiving portion 5, so that the structure is not complicated.

In the disc brake device according to the third aspect of the present invention, when the pad spring 9 is temporarily assembled, the step portion 6 for receiving one end of the spring 9 is provided on the caliper assembly 1, so that the pad spring 9 can be received here. Thus, even if there is no elastic piece standing in the radial direction of the disk rotor, which is indispensable in the conventional spring, the elastic piece does not easily fall off, and the assembling work can be simplified. In addition, since there is no elastic piece standing in the radial direction of the disk rotor, it is possible to maintain stable braking performance without applying an eccentric load, and furthermore, since the pad spring 9 is flat, it is necessary to stack the pad spring 9 alone. As a result, not only the storage space can be reduced, but also deformation of the members can be prevented.

In the fourth invention, the step portion 6 for receiving one end of the pad spring 9 is provided on the reaction force receiving portion 5 in the caliper assembly 1 of the disc brake device.
There is no need to complicate the structure. In the fifth invention, a locking means for restricting the inadvertent movement of the pad spring 9 is provided, so that stable braking performance is maintained for a long period of time.

In the sixth aspect of the present invention, the bridging portion 4 is used as locking means for restricting the pad spring 9 from inadvertent movement.
Tongues 9a, 9b of pad spring 9 on the inner wall surface
Is provided, the movement of the pad spring 9 can be regulated without increasing the number of parts, and the braking performance of the brake can be stabilized. In the seventh invention, the side wall 26 is provided on the reaction force receiving portion 5 as locking means for restricting the pad spring 9 from inadvertent movement.
Is provided, the movement can be regulated without increasing the number of parts, and the braking performance of the brake can be stabilized.

In the eighth invention, since the pad spring 9 is made of a flat leaf spring, an unbalanced load is not applied to the brake pads 8a and 8b, which is advantageous for stabilizing the braking performance of the brake. And it is easy to handle as a part. In the ninth invention, the pad spring 9 is made of a wire spring, so that the spring 9 can be reduced in weight.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a disc brake device according to the present invention.

FIG. 2 is a diagram showing a side view of FIG. 1;

FIG. 3 is a diagram showing a II-II section of FIG. 2;

FIG. 4 is a view showing a cross section taken along the line III-III of FIG. 2;

5A is a diagram illustrating a plane of a pad spring, and FIG. 5B is a diagram illustrating a side surface thereof.

6 (a) to 6 (d) are explanatory views of a state of assembling a pad spring.

FIG. 7A is a diagram illustrating a plane of another pad spring, and FIG. 7B is a diagram illustrating a side surface thereof.

FIG. 8 is a diagram showing a configuration of a conventional disk brake device.

FIG. 9 is a diagram showing a cross section taken along line II of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Caliper assembly 2 Pad pressing means 3 Actuator part 4 Bridge part 5 Reaction force receiving part 6 Step part 7 Torque receiving member 8a Brake pad 8b Brake pad 9 Pad spring 10 Slide guide mechanism 11 Guide pin 12 Guide pin 13 Bush 14 Bush 15 Cap 16 Cap 17 Air chamber 18 Cam lever 19 Eccentric cam 20 Pin 21 Sleeve 22 Fixed anchor 23 Needle roller bearing 24 Connecting bolt 25 Recess 26 Side wall 27 Brake disc 28 Friction pad 29 Friction pad 30 Brake bracket 31 Guide rail 32 Guide rail 33 Plate Spring 34 Brake caliper 35 Working piston 36 Left arm 37 Peephole for wear status inspection P Elastic piece

Claims (9)

[Claims] 1. A caliper assembly comprising an actuator portion having pad pressing means for pressing a brake pad, and a reaction force receiving portion integrally connected to the actuator portion via a bridging portion, wherein the caliper assembly is A caliper assembly having a step portion for locking one end of the pad spring to prevent accidental detachment thereof in a state where a pad spring for positioning a brake pad and preventing a rattle is temporarily assembled. 2. The caliper assembly according to claim 1, wherein the step portion is provided on a reaction force receiving portion of the caliper assembly. 3. An actuator portion having a torque receiving member, brake pads movably supported by the torque receiving member and arranged on both sides of a disk rotor, and pad pressing means adjacent to one of the brake pads. A caliper assembly having a reaction force receiving portion adjacent to the other of the brake pads integrally connected to the actuator portion via a bridge portion and connected to the torque receiving member via a slide guide mechanism; A pad spring is provided at the outer peripheral end thereof to press the brake pad toward the axis of the disk rotor to position each brake pad and prevent rattle, and one of the brake pads is pressed toward the disk rotor by pad pressing means. The reaction receiving part of the caliper assembly causes the other brake pad to In a disc brake device in which the disc rotor is pressed toward the disc rotor and the disc rotor is sandwiched between brake pads on both sides, the caliper assembly locks one end of the pad spring in a state where the pad spring is temporarily assembled. A disc brake device having a step portion for preventing inadvertent dropping. 4. The disc brake device according to claim 3, wherein the step portion is provided at a reaction force receiving portion of the caliper assembly. 5. The disc brake device according to claim 3, further comprising locking means for restricting an unexpected movement of the pad spring. 6. The locking means is engaged with the inner wall surface of the bridging portion by the end of the tongue protruding along the circumferential direction of the disk rotor of the pad spring, and is displaced by inadvertent movement from the assembled position. 6. The disc brake device according to claim 5, wherein the disc brake device prevents the brake. 7. A locking means, wherein an end of the pad spring in the axial direction of the disk rotor is engaged with a reaction force receiving portion or a bridging portion, thereby restricting displacement due to inadvertent movement from the installation position. 6. The disc brake device according to claim 5, wherein: 8. The disc brake device according to claim 1, wherein the pad spring is a leaf spring. 9. The disc brake device according to claim 1, wherein the pad spring is a wire spring.