JPH0142672Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a dust cover with cooling fins for disc brakes that is formed to prevent temperature rise in the cylinder part and at the same time prevent dust from entering the brake. Regarding.

Prior Art As in this invention, a part of the cover provided with cooling fins is formed by entering the guide part of the inner pad, and this part prevents dust from entering the disc brake from the inner pad side, and There is no conventional example in which the cylinder is formed to enhance the heat dissipation effect from the outer surface of the cylinder. The cooling of the cylinder part formed in the caliper in the conventional example is configured to prevent the transmission of frictional heat due to the contact between the inner pad and the rotor by providing a heat shield plate on the piston end surface, and the dust prevention is performed by installing a heat shield plate on the piston end surface. A dust seal is provided at the cylinder inlet to prevent dust from entering the fitting sliding surface of the cylinder and piston.

Problems to be Solved by the Invention Since the pads are configured to engage with notched guide portions formed on the caliper at both ends, dust that enters through the inner pad guide portions will be removed from the contact between the caliper and the inner pad. It acts to impede the movement of the engaging part, potentially damaging the caliper, and at the same time invades the contact surface between the inner pad and rotor, causing extreme wear on the inner pad and uneven wear, and at the same time, damaging the piston end. It directly attacks and damages the dust seals at the rim and cylinder inlet, and at the same time invades the sliding parts of the piston and cylinder, causing seizure or straining of the piston, or a sudden rise in the cylinder fluid temperature, causing normal operation. There is a problem that the brake function is impaired.

Means for Solving the Problems This invention solves the above-mentioned problems by providing a cooling cover formed with protruding fins on the outer surface of the cylinder part of the caliper, and at the same time attaching a part of the cooling cover to the inner pad guide part. It is an object of the present invention to provide a dust cover with cooling fins for a disc brake, which is formed in such a way as to prevent dust from entering from the inner pad side.

Embodiments This invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a partially cutaway sectional view of a disc brake provided with a dust cover with cooling fins according to this invention. In the figure, 1 is the caliper, 2 is the cylinder, 3 is the piston, 4 is the inner pad back plate,
5 is the inner pad, 6 is the anchor plate, 7
is the rotor, 8 is the dust cover with cooling fins, 9 is the rotor
10 is a cooling fin, and 10 is a dustproof part.

The disc brake is 2 on the anchor plate 6.
The caliper 1 is held by the retainers 12 (FIGS. 3 and 4), and the rail portion 13 is held during braking.
(Fig. 4) and rotate the rotor 7 between the inner pad 5 and the outer pad 11 (second
It is formed so that it can be clamped and braked by the Further, a cylinder 2 is formed in the caliper 1, and a piston 3 is formed in the cylinder 2. When pressurized hydraulic oil is introduced into the cylinder 2 during braking, the piston 3 is pushed out and pushes the inner pad back plate 4, bringing the inner pad 5 into contact with one side of the rotor 7 with strong mutual pressure, and at the same time The force causes the caliper 2 to move in the opposite direction to the pressing force, bringing the outer pad 11 into contact with the other side of the rotor 7 to generate a braking force. Therefore, an equal thickness portion 14 is provided on the outer surface of the caliper 1 so that the wall thickness of the cylinder 2 is as uniform as possible in the axial direction from the end edge of the cylinder 2. A cover base 15 is formed in an angular shape on the part 14, and a plurality of cooling fins 9 are provided on the cover base 15 at equal intervals and protrude upright. a rectangular flat side cover 16 in contact with the outer surface of the cylinder 2, and extending parallel to the axis of the cylinder 2;
A side base 17 is provided at the end edge of the inner pad 5 and a dustproof board 18 is formed with a dustproof part 10 that closes the guide part where the caliper 1 engages, and the side base 17 is The cooling fins 9 are formed to protrude upright.

The dust cover 8 with cooling fins is formed integrally by bending a thin steel plate, or is formed by aluminum die casting to reduce the weight and prevent the weight of the caliper 1 from increasing. Further, the cover base 15 formed in an angled shape has its angled inner side abutted against the outer surface of the cylinder 2 formed on the caliper 1 in parallel to the axis of the cylinder 2, and at the same time, the inner side Another edge part perpendicular to the cylinder 2 is provided so as to come into contact with the outer end surface of the cylinder 2 formed on the caliper 1, and is screwed and fixed to the caliper 1. In addition, the side base 17 formed integrally with the cover base 15 is formed by bending the tip of the dustproof substrate 18, which forms a part of the side base 17, at a substantially right angle, and forming the side base 17 on both sides of the inner pad 5. The dust prevention part 10 is formed and provided so as to close the entrance of the guide part which engages with the caliper 1.

Further, the cooling fins 9 are provided in a spaced manner with equal intervals on the cover base 15, and are also provided in a radial pattern centered on the center of the rotor 7. The cooling fins 7 formed on the side base 17 are parallel to the axis of the cylinder 2 and are formed in the shape of shelves protruding outward perpendicularly to the side cover 16 with appropriate spacing. However, similarly to the side cover 16, the dust-proof substrate 18 is formed at equal intervals, parallel to the axis of the cylinder 2, and protruding outward perpendicularly to the dust-proof substrate 8.

In this embodiment, the dust cover 8 with cooling fins is fixed to the cylinder 2 side of the caliper 1 and is formed to exclusively prevent dust from entering from the inner pad 5 side.
By providing it on the end side facing the cylinder 2, it is also possible to prevent dust from entering from the outer pad 11 side.

Effects Since this invention is constructed as described above, it is possible to prevent dust, especially solid granular substances, from entering the brake from the guide portion where the inner pad and the caliper engage. At the same time, cooling fins are provided to radiate heat directly from the cylinder, making it possible to keep the temperature of the hydraulic fluid in the cylinder low at all times. Since the cylinder portion of the caliper is formed with equal thickness, there is no local deviation in temperature and a uniform temperature drop is possible. Furthermore, since both the cover base and the side base are fixed to the same thickness, heat transfer is uniform and efficient heat radiation is possible. Further, since the dust cover with cooling fins is configured to be fixed by screwing, it can be attached and removed as necessary, and there is a practical advantage that it does not need to be attached to vehicles where it is not needed.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway cross-sectional view of a disc brake equipped with a dust cover with cooling fins (X-X cross section in Figure 4), Figure 2 is a part of the disc brake including the axis of the cylinder. FIG. 3 is a front view of the cylinder side of the disc brake with part removed, and FIG. 4 is a perspective view of the caliper part with part removed. 1... Caliper, 2... Cylinder, 3...
Piston, 4... Inner pad back plate, 5... Inner pad, 7... Rotor, 8... Dust cover with cooling fins, 9... Cooling fins, 10...
Dust-proof portion, 15...cover base, 16...side cover, 17...side base, 18...dust-proof board.

Claims (1)

[Scope of utility model registration request] A caliper 1 in which a cylinder portion in a disc brake is provided with a uniform wall portion 14 having a uniform wall thickness extending from the end edge of the cylinder 2 to the maximum length in the axial direction; Part 1
4, an angular cover base 15 formed with a plurality of cooling fins 9 protruding upright at equal intervals; A side cover 16 in the shape of a rectangular flat plate that contacts the side cover 16 and a dust-proof base plate 18 extending parallel to the axis of the cylinder 2 and having a dust-proof part 10 provided at the end edge thereof to close the guide part in which the inner pad 5 and the caliper 1 engage are provided, A dust cover with cooling fins for a disc brake, in which cooling fins 9 are screwed and fixed to a side base 17 provided with cooling fins 9 projecting upright.