JPH0121373B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a pad rattling prevention spring for a pin type disc brake.

Generally, in a pin type disc brake, a caliper is supported movably in the axial direction of the rotor via a pin slide type sliding support device against a fixed support, and a hydraulic cylinder device built into one side of the rotor of this caliper is used to move the inner side of the caliper. The friction pad is pressed against the rotor, and the reaction force causes the caliper to move toward the inner side, so that the caliper reaction claw located on the other side of the rotor presses the outer friction pad against the rotor. Recently, in order to reduce weight, many devices are equipped with a sliding support device in which a slide pin is fixed in a cantilevered manner so as to extend from a fixed support toward the inner side.

In addition, in many of these pin type disc brakes, the friction pads are directly supported by a fixed support so that the fixed support directly receives the torque during braking. In order to prevent backlash when the brake is not on the brake, an anti-backlash spring is installed between the caliper and the friction pad.

FIG. 1 shows such a conventional pin-type disc brake. In the figure, 3 is a caliper, and 4 is an inner wheel located on the inner side when the caliper 3 is placed astride the rotor 1. It is a side leg and has a built-in hydraulic cylinder device. 5 is a reaction claw located on the outer side. Reference numerals 6 and 6 designate a pair of pin slide type sliding support devices provided on both sides of the inner leg portion 4 of the caliper in the circumferential direction of the rotor. ,
The caliper 3 is supported so as to be movable in the uniaxial direction of the rotor.

Reference numerals 8 and 9 denote a pair of inner and outer friction pads, and ear portions 8a, 8a, 9a, 9a are formed at the radially outward corners of the rotor on both sides in the rotor circumferential direction.
is supported by the fixed support 2 by being hooked onto the fixed support 2. The rattling springs 10, 10, each having a V-shaped plane and whose ends are fitted into holes formed in the ears 8a, 9a of the friction pads 8, 9, engage with the inner surface of the saddle of the caliper 3, thereby causing the caliper to 3 and the friction pads 8, 9 are given a spring force in the direction of separation in the radial direction of the rotor, so that the friction pads 8, 9 are prevented from rattling when assembled to a vehicle.

In addition, 11 is a caliper 3 and a friction pad 8,
9, and since the pin type disc brake in this example is assembled to an integral knuckle type fixed support, it is assembled so that these subassemblies can be handled all at once before assembling the caliper and friction pad. It is used to store the subassembly in a vehicle, and is removed after the subassembly is installed in the vehicle.

By the way, in the pin-type disc brake with the above configuration, the sliding support device is installed at a biased position toward the inner side of the caliper, and the engagement position of the anti-rattle spring between it and the other friction pad is directly above the rotor (near the caliper saddle). position), the caliper 3 is held against the rotor axis by the spring force of the anti-backlash springs 10, 10.
The reaction pawl portion 5 tends to tilt in such a way that it lifts up, and this may lead to uneven wear of the friction pad when the brake is released.

Therefore, in the present invention, in order to eliminate the problems caused by the assembly of the pad rattling prevention spring, the position where the rattling prevention spring engages with the caliper (i.e., the reaction force fulcrum position of the spring) is set to the sliding support device. The caliper is configured to have two positions on both sides in the rotor axis direction in relation to the positional relationship of the caliper, and is configured to maintain the parallel attitude of the caliper with respect to the rotor axis.

Therefore, the gist of the present invention is to enable the rotor to move in the axial direction by means of a fixed support, which is disposed so as to straddle a part of the edge of the rotor, and via a pin slide type sliding support device located on one side of the rotor. In a pin type disc brake equipped with a supported caliper and a pair of opposing friction pads supported movably in the axial direction of the rotor by a fixed support, the friction pads are engaged with the caliper and the friction pads, respectively. A pad rattling prevention spring is provided that biases the spring force in the rotor radially inward direction, and a reaction force fulcrum of the pad rattling prevention spring that engages with the caliper is located in the rotor axial direction when the sliding support device is assembled to the fixed support body. The pads of the pin type disc brake have a rattling prevention structure, which is characterized by the pads being located on both sides of the attachment part, and the pad rattling prevention spring of the pin type disc brake with such a structure has a spring force in the direction of separating the friction pads from the rotor. The reason lies in the fact that the urging members are integrally combined.

The present invention will be described below based on embodiments shown in the drawings.

Example 1 In the examples shown in FIGS. 2 to 5, 101
102 is a rotor, 102 is a fixed support, 103 is a caliper, 104 is an inner leg portion thereof, 105 is a reaction pawl portion, 106 and 106 are sliding support devices, 10
7, 107 are mounting bolts for assembling and fixing this to the fixed support, 108, 109 are friction pads, 1
08a, 108a, 109a, and 109a are the ear parts on both sides, and the above structure is almost the same as the pin type disc brake of the structure shown in FIG. .

Reference numeral 110 denotes a pad rattling prevention spring, which is an example of the present invention, and is formed into a substantially U-shape in plan (see FIG. 2) by bending an elastic spring wire made of steel, plastic, etc., and has U-shaped both arm portions 110a. ,110
a is the ear portion 108a of the friction pads 108, 109;
It passes through the hole provided near 109a, and the tips 110b, 110b of both arm parts are bent and engage with the back surface (the surface opposite to the rotor side) of the caliper reaction claw part 105, so that the caliper reaction claw part 105
is provided to press the rotor radially outward. Further, the U-shaped central portion 110c of the spring 110 to prevent backlash is bent and goes around the inner side leg portion 104 of the caliper inward of the rotor diameter, and engages with the inner side leg portion 104 of the caliper. It is provided so as to press outward. With such a configuration, the pad rattling prevention spring 110 has both arms 1 having a substantially U-shape in plan view.
Friction pads 108, 1 at 10a, 110a
09, and the tips 110 of both arms thereof.
By engaging with the caliper 103 at the pads b, 110b and the central portion 110c, a spring force is applied so that these friction pads and the caliper are separated in the rotor radial direction. Since the position of the force fulcrum is divided on both sides of the sliding support devices 106, 106 in the rotor axial direction,
The spring force acting from this spring has the effect of significantly reducing the tendency of the caliper 103 to tilt.

In the figure, reference numerals 111 and 111 are return springs that are fitted into both arms 110a and 110a of the pad rattling prevention spring 110 so as to separate the pair of friction pads 108 and 109, and when the brake is released. It acts to separate both friction pads from the rotor 101.

Embodiment 2 In the embodiments shown in FIGS. 6 to 9, except for the structure of the pad rattling prevention springs 210, 210, the other structures are the same as those of Embodiment 1, so the same members are denoted by 100. In addition, the description thereof will be omitted.

Pad rattling prevention spring 2 in this embodiment
10 and 210 are formed by bending the same elastic spring wire as in the first embodiment, and the friction pads 208,
A linear portion 210a that passes through holes provided near ears 208a and 209a of 209, and an outer side end that engages with the back surface of the caliper reaction claw portion 205 so as to press the reaction claw portion 205 radially outward of the rotor. portion 210b, and an inner side end portion that engages with the outer periphery of a boss portion extending in the circumferential direction of the rotor, which is an integrated portion of the sliding support devices 206, 206 of the caliper 203, and presses the boss portion radially outward of the rotor. It is set up to have the following.

According to such a configuration, the friction pads 208,
209 to the inside of the rotor diameter, and press the caliper 2
03 receives the reaction force of this pressing force is located on both sides of the rotor axial direction with respect to the fixed part of the sliding support device, so the pad rattling prevention spring 210 The effect of the spring force is that the tendency of the caliper 203 to tilt with respect to the rotor axis is significantly reduced.

Embodiment 3 In this embodiment, as shown in FIG.
10a or the straight part 2 of the same spring of Example 2
10a, a tapered cylindrical spring member 112 or 212 whose diameter gradually decreases toward both diameters in the axial direction of the rotor;
This figure shows the case where the spring member 112 or 212 is attached to the friction pad 10 on the outer periphery.
By engaging with the radially outer edge of the rotor 8, 109 or 208, 209, a spring force is applied to these friction pads to move them away from the rotor.

By fitting the spring member in this manner, the return spring, which is a coil spring shown in each of the above embodiments, becomes unnecessary, and the assembling workability becomes even better.

As described above, the pad rattling prevention structure of the pin type disc brake according to the present invention prevents the caliper from tilting, thereby preventing uneven wear of the pad lining and preventing the occurrence of dragging when not braking. , its usefulness is extremely great.

[Brief explanation of drawings]

Fig. 1 is a plan view including a partial cross section showing a conventional pin type disc brake, Fig. 2 is a plan view including a partial cross section of a pin type disc brake according to Embodiment 1 of the present invention, and Fig. 3 is the same. 4 is a rear view of the same, FIG. 5 is a vertical side view of the same, FIG. 6 is a plan view including a partial cross section of the pin type disc brake of Example 2, FIG. 7 is a front view of the same, and FIG. 8 is a rear view of the same, FIG. 9 is a longitudinal sectional side view of the same, and FIGS. 10A and 10B are views showing an example in which a pad return spring member is assembled to a pad backlash prevention spring. 1,101,201...Rotor, 2,102,
202...Fixed support body, 3,103,203...Caliper, 4,104,204...Inner side leg part,
5,105,205...Reaction claw part, 6,106,
206...Sliding support device, 7,107,207...Mounting bolt, 8,108,208...Inner side friction pad, 9,109,209...Outer side friction pad, 8a, 108a, 208a, 9a, 10
9a, 209a... ears, 10, 110, 210...
Spring for preventing looseness, 110a...Both arms,
110b...Tip of both arms, 110c...Central part, 21
0a... Straight line part, 210b... Outer side end, 21
0c...Inner side, 11...Hold spring,
111...Return spring, 211...Spring member.

Claims (1)

[Scope of Claims] 1. The rotor is disposed so as to straddle a part of the edge of the rotor, and is movably supported in the axial direction of the rotor by a fixed support via a pin slide type sliding support device located on one side of the rotor. In a pin type disc brake equipped with a caliper and a pair of opposing friction pads supported movably in the axial direction of the rotor by a fixed support, the friction pads are engaged with the caliper and the friction pads to adjust the rotor diameter. A pad rattling prevention spring is provided that biases the spring force in the inward direction, and a reaction force fulcrum of the pad rattling prevention spring that engages with the caliper is located at the assembly portion of the sliding support device to the fixed support body with respect to the rotor axial direction. A pin-type disc brake with a rattle-preventing structure that is located on both sides. 2. The pad rattling prevention structure for a pin type disc brake as set forth in claim 1, wherein the pad rattling prevention spring is a wire spring material that penetrates and engages with a hole formed in the friction pad. 3 A caliper that is disposed so as to straddle a part of the rotor edge and is movably supported in the rotor axial direction by a fixed support via a pin slide type sliding support device located on one side of the rotor, and a fixed support. In a pin type disc brake equipped with a pair of opposing friction pads supported movably in the axial direction of the rotor by a body, the friction pads are engaged with the caliper and penetrated into the friction pads, thereby causing the friction pads to move within the diameter of the rotor. In addition to providing a padded rattling prevention spring that applies spring force in the direction,
The reaction force fulcrums that engage with the caliper of this pad rattling prevention spring are located on both sides of the assembly portion of the sliding support device to the fixed support body with respect to the rotor axial direction, and further extend between the pair of friction pads of the pad rattling prevention spring. A pad backlash prevention structure for a pin type disc brake, characterized in that a spring member is fitted in the straight portion to apply a spring force to the friction pads in a direction away from the rotor.