JPH0361057B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a caliper rotating disc brake.

Generally, a friction pad located on one side of the rotor is pressed against the rotor by a pad pressing mechanism such as a hydraulically operated type, and a so-called caliper is floated on the friction pad on the other side of the rotor by using the reaction force of the pad pressing on the one side. Various types of disc brakes have been proposed in which the disc brakes are brought into pressure contact with the rotor, and one of them is a caliper rotating type disc brake in which the caliper is rotated in the tangential direction of the rotor or around an axis parallel to this. It is being

The present invention improves the pad support structure of such a caliper rotary disc brake to provide a reliable torque support structure during braking, and also facilitates the workability of this torque support surface, making it easier to assemble friction pads. This was done with the aim of improving performance and exchange workability. The gist of the present invention, which has been made to achieve the above object, is that the rotor is arranged so as to have a pair of legs facing each other on both sides of the rotor from a saddle section that axially crosses a part of the edge of the rotor; The leg on one side of the rotor accommodates a pad pressing mechanism, and the leg on the other side includes a caliper serving as a reaction part, and a rotary slide that rotatably supports the caliper about an axis parallel to a tangent to a portion of the rotor. a support device; a pair of friction pads disposed on both sides of the rotor at a radially inner position of the rotor in the caliper saddle; A pad indicating pin for suspending a pair of friction pads is provided, and each of the friction pads is formed with an engaging arm for engaging with both sides of the caliper saddle in the circumferential direction of the rotor. In the caliper rotary disc brake, the suspension pin attachment portion is provided apart from the side portion of the caliper saddle in the radial and circumferential directions of the rotor.

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

In the figure, 1 is a rotor, 2 is a caliper arranged so as to straddle the edge of the rotor 1, and a saddle 3 that crosses the edge of the rotor in the axial direction;
The rotor has a leg 4 on one side and a leg 5 on the other side located opposite to each other on both sides, a cylinder 6 is formed in the leg 4 on one side, and a pad press containing a hydraulic chamber 7, a hydraulic piston 8, a boot 9, and a seal ring 10. The mechanism is housed. In addition, the other side leg 5 is a reaction part (claw part)
is doing.

Reference numerals 11 and 12 designate friction pads on one side and the other side, which are pressed against the rotor 1 by the action of the pad pressing mechanism and the caliper reaction section, and their supporting manner and transmission of brake torque will be described later.

A pair of extending arms 13 and 14 are formed from one side leg 4 of the caliper 2 and are spaced apart in the rotor circumferential direction toward the rotor radially inward side.
3 and 14 are provided so that the axle bearing or the adapter 15 fixed thereto is sandwiched between them at their distal ends.

The adapter 15 in this embodiment is a suspension strut 16 that connects the sprung and unsprung parts of the vehicle.
It also serves as a member that supports the lower end.

Between the caliper extending arms 13, 14 and the adapter 15, a rotary sliding support device is configured to rotatably support the caliper 2.
That is, the adapter 15 has a caliper 2.
Shaft hole openings 17, 17 are provided so as to be parallel to the tangent line of the rotor 1 at the positions where the calipers are arranged, and are formed to open toward both sides in the circumferential direction of the rotor. Caliper guide pins 18, 18 screwed and fixed to the extending arms 13, 14 are fitted and slid together to constitute a rotary sliding support device. Note that 19 is the guide pin 1.
8 is a rubber sleeve that is assembled and fixed to the tip of the adapter 15 and slides into sliding contact with the inner circumferential surface of the shaft hole opening 17 of the adapter 15 with a predetermined elastic force.
The restoring action maintains the rotational attitude of the caliper at a fixed stationary position, or provides a fixed return rotation when the brake is released, thereby preventing pad dragging. Further, 20 is a dust rubber seal for sealing the sliding surface from the outside air.

Note that the rotating sliding support device is not limited to the structure shown in the embodiment, but according to the structure described above, the sealing structure of the sliding surface can be obtained relatively easily, and it is easy to assemble and can be fastened with bolts. This has the advantage of not causing excessive force on the caliper body.

Next, a structure for supporting the friction pads 11 and 12 and a structure for receiving brake torque will be described.

The friction pads 11 and 12 described above have a pair of ear portions 21, 21, 22, 22 extending radially outward from the upper corner portions (rotor radially outward side corners) in FIG. 1 on both sides in the circumferential direction of the rotor. is formed, thereby having a recessed portion that loosely fits into the caliper saddle portion 3 from the rotor radially inward side. The formation of this recess is to transmit the brake torque generated in the pads during braking to the caliper. , 22, the rotor circumferentially opposing inner surfaces 23, 23 and 24, 24 are as follows:
It is provided as a surface perpendicular to the rotor circumferential direction so as to be suitable for engagement and transmission of brake torque.

Arms 26, 26, 27, and 27 for assembling pad suspension pins are formed protruding from one side leg 4 and the other side leg 5 of the caliper 2 on both sides in the rotor circumferential direction, respectively, and extend the rotor edge in the axial direction. A pair of padded suspension pins 28, 28 extending across these arms 26, 27
It has been erected across. The ears 21, 22 of the friction pads 11, 12 are arranged so as to engage with the outer peripheral surfaces of the pad suspension pins 28, 28 at their lower surfaces, and as shown in FIG. The friction pads 11 and 12 are prevented from coming out downward from the caliper saddle 3, and the friction pads 11 and 12 are assembled while maintaining their slidability in the rotor axial direction. With this configuration, when a torque is generated in the friction pads 11 and 12 during braking, that torque is transmitted to the caliper 2 from the side surfaces 23 and 24 of the caliper saddle 3. And this caliper saddle side 2
3 and 24 are parts that need to engage with the ears of the friction pads 11 and 12 to ensure their sliding in the rotor axial direction, so they usually require finishing cutting as sliding surfaces. The first example showing the above example
As clearly shown in the figure, the arms 26 and 27 for assembling the pad suspension pins of the caliper 2 are provided so as not to overlap with the side surfaces 25 and 25 in the rotor radial direction. 25 can be easily processed. This is because if they overlap, restrictions on processing will become greater. Note that the side surface 25 is provided so as to be continuous from one side of the rotor to the other side along the rotor axial direction.

29, 29 are caliper 2 and friction pads 11, 1
This is a pad clip made of a curved spring material stretched between the pad suspension pins 28, 28, and is equipped with a coil portion wound around the pad suspension pins 28, 28, and an elastic force acting portion continuous with the coil portion, as shown in the figure. The friction pads 11 and 12 are attached to the caliper 2 so as to exert an elastic force that presses them radially inward to the rotor.

In the caliper rotating type disc brake configured as described above, when assembling the friction pads to the caliper or replacing the friction pads, the work is made easier by removing and reassembling the pad suspension pins. In addition, the friction pad and caliper can be handled as a sub-assembly that integrates them, giving the advantage of good handling. Its usefulness is great as it has the advantage that it can be easily carried out without being restricted by the structural parts.

In addition, in the caliper rotating type disc brake of the present invention, the suspension part that supports the friction pad with a pin and the torque receiving surface that receives torque during braking are separate, so the friction pad does not bite into the suspension pin during braking. It also has the effect of ensuring stable sliding performance of the friction pad without any defects.

It should be noted that the present invention is not limited to the above embodiments, and it is understood that, for example, the pin support of the friction pad may be of a type in which a pad suspension pin is loosely fitted into a large diameter hole formed in the friction pad. It will be.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of a disc brake showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a longitudinal sectional side view thereof. 1: Rotor, 2: Caliper, 3: Saddle, 4:
One leg, 5: Other leg, 6: Cylinder, 7: Hydraulic chamber, 8: Piston, 9: Boot, 10: Seal ring, 11, 12: Friction pad, 13, 14: Extended arm, 15: Adapter, 16:Strut, 1
7: Shaft hole opening, 18: Guide pin, 19: Rubber sleeve, 20: Seal ring, 21, 22: Pad ear (ear), 23, 24: Side surface, 25: Side surface of caliper saddle, 26, 27: Arm , 28: Padded suspension pin, 29: Padded clip.

Claims (1)

[Claims] 1 The rotor is arranged so as to have a pair of opposing legs on both sides of the rotor from a saddle that axially crosses a part of the edge of the rotor, and the leg on one side of the rotor accommodates a pad pressing mechanism, and the leg on the other side acts as a reaction force. a caliper forming a part of the rotor; a rotary sliding support device that rotatably supports the caliper about an axis parallel to a tangent to the part of the rotor; and pad support pins that are attached to the caliper so as to cross the rotor edge at both outer circumferential positions of the caliper saddle and suspend the pair of friction pads, each of the friction pads are formed with engaging arms for engaging with the side surfaces of the caliper saddle on both sides in the rotor circumferential direction, and the pad suspension pin attachment portion of the caliper is connected to the side surfaces of the caliper saddle in the radial and circumferential directions of the rotor. A rotary caliper type disc brake characterized by being installed at a distance.