JPH0543301Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a friction pad for a disc brake that releases braking heat from the friction pad to reduce heat transfer to the caliper.

[Conventional technology]

As a friction pad for a disc brake whose purpose is to reduce the transfer of braking heat to the caliper, for example, as shown in Japanese Patent Application Laid-Open No. 52-50469, there is a friction pad between the back of the back plate and a ceramic heat insulating plate. In addition, there is one in which a porous heat sink made of a material with higher thermal conductivity than the back plate and the heat insulating plate is interposed.

[Problem to be solved by the invention] However, the friction pad having the above-described structure is disposed between the disc and the tip-shaped piston that is fluid-tightly and movably inserted into the cylinder hole of the caliper.
Since the heat insulating plate is fitted and fixed into the opening of the cup-shaped piston, the ceramic heat insulating plate is protected by the piston opening and is protected from water, mud, etc. drawn in by the rotation of the disk, thereby preventing damage. However, although the porous heat sink has a cooling effect, on the other hand, braking heat is trapped in the inner hole of the piston, and there is a risk that the temperature in the hydraulic pressure chamber on the back of the piston may increase.

[The problem that the idea aims to solve]

However, in the above-mentioned structure, the braking heat of the friction pads is blocked by the heat insulating plate and the transmission to the caliper is reduced, but the braking heat is trapped in the friction pads, causing carbonization and mirror polishing of the lining surface, which reduces the coefficient of friction. There is a risk of reducing durability.

Therefore, the present invention protects the heat insulating plate from water, mud, etc. drawn in by the rotation of the disk, without reducing the durability of the friction pad.
Another object of the present invention is to provide a friction pad for a disc brake that reduces the transfer of braking heat to the caliper side.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a heat dissipation plate on the back of the back plate of the friction pad, a heat insulating plate on the back of the heat dissipation plate, and uses a material with higher thermal conductivity for the heat dissipation plate than the back plate and the heat insulating plate. The heat insulating plate is made of a synthetic resin heat insulating plate interposed on the back side of the heat radiating plate, and a stainless steel heat insulating plate provided on the back side of the synthetic resin heat insulating plate. In addition, a heat dissipation fin is formed from the disk retraction side edge of the heat dissipation plate to the disk inner peripheral side edge near the disk retraction side edge, the heat dissipation fin being bent toward the heat insulating plate.

[Effect]

Therefore, the synthetic resin heat insulating plate and the stainless steel heat insulating plate improve the heat insulating effect, and the braking heat of the friction pad is released from the heat radiating plate and the heat radiating fin, and is transferred to the caliper instead of being trapped in the friction pad. Furthermore, the heat dissipation plate, heat dissipation fins, and stainless steel heat insulating plate protect the synthetic resin heat insulating plate from water, mud, etc. drawn in by the rotation of the disk, and improve the durability of the friction pad. can be done.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The caliper 2 of the disc brake 1 has an action part 2
a and the reaction part 2b are integrally connected by a bridge part 2c that straddles the outer periphery of the disk 3, and is supported by a bracket 4 via sliding pins 5, 5 so as to be movable in the axial direction of the disk 3.

A cylinder hole 6 is formed in the action part 2a of the caliper 2, and a piston 7 is fitted into the cylinder hole 6 in a fluid-tight and movable manner, so that hydraulic pressure is created between the piston 7 and the bottom of the cylinder hole 6. It defines room 8.

A friction pad 9 is disposed between the piston 7 and the disk 3, and a friction pad 10 is disposed between the disk 3 and the reaction part 2b.
When the piston 7 moves toward the disk 3 and presses the friction pad 9 against one side of the disk 3 due to the pressure fluid supplied to the piston 7, the reaction force causes the reaction portion 2b to push the friction pad 10 against the other side of the disk 3. Press to perform braking action.

The friction pads 9, 10 are made of iron back plates 9a, 10.
The linings 9b and 10b are fixed to the linings 9b and 10b, respectively, and the hanger pin 1 is attached to the upper side of one of the back plates 9a and 10a.
1 is suspended from a bracket 4, and a protruding ear piece formed on the other side is supported in a recess 4a of the bracket 4.

Back plate 10a of friction pad 10 on reaction part 2b side
A heat radiating plate 12 is provided on the back surface, and heat insulating plates 13 and 14 are provided on the back surface of the heat radiating plate 12, respectively. The heat insulating plate 13 interposed on the back side of the heat sink 12 is made of synthetic resin, and the heat insulating plate 14 provided on the back side of the synthetic resin heat insulating plate is made of stainless steel.

The heat sink 12 includes a back plate 10a and a heat insulating plate 1.
A material having a higher thermal conductivity than that of 3 and 14, such as an aluminum alloy, is used, and the back plate 10a is formed into a slightly larger shape, and the inside of the disk from the disk rotation side edge to the area near the disk rotation side edge is used. Heat dissipation fins 12a bent in the direction of the heat insulating plates 13 and 14 on the peripheral edge
A window portion 12b is provided to reduce the contact area with the heat insulating plate 13 and reduce heat transfer.

The heat insulating plate 13 has substantially the same size as the back plate 10a and is formed into a flat plate shape. The heat insulating board 14 is formed to have approximately the same size as the heat insulating board 13, has three locking claws 14a for attaching the heat sink 12 and the heat insulating board 13 to the back plate 10a, and has a reaction part. A fin 14b is raised and formed in the center portion that does not contact the fin 14b.
14c is formed at the part where b is caused.

Also, the back plate 9a of the friction pad 9 on the side of the action part 2a
A heat sink 12, a heat insulator 13, and a stainless steel heat insulator 15 are also provided on the back.
5 is formed into a flat plate shape to reduce the transfer of braking heat to the piston 7.

With this configuration, the heat sink 12 has higher thermal conductivity than the back plates 9a, 10a and the heat insulating plates 13, 14, 15, so the braking heat of the friction pads 9, 10 is transferred to the heat sink of the heat sink 12. 12a, the braking heat is released from the parts not covered by the heat insulating plates 13, 14, and 15, and prevents braking heat from being trapped in the friction pads 9, 10, and the synthetic resin heat insulating plates 13,
The transmission to the caliper 2 is reduced by being blocked by the stainless steel heat insulating plates 14 and 15, and the friction pads 9 and 1
Caliper 2 without reducing the friction coefficient of 0.
It is possible to reduce the transfer of braking heat to.

Moreover, the disk 3
The comparatively fragile synthetic resin heat insulating plate 13 is protected from water, mud, etc. drawn in by the rotation of the friction pads 9 and 10, and the durability of the friction pads 9 and 10 is not reduced.

Also, the heat sink has a higher heat dissipation effect when it is larger than the heat insulating plate.

[Effect of idea]

As described above, the present invention provides a heat sink made of a material with higher thermal conductivity than the back plate and the heat sink between the back surface of the friction pad and the heat sink, and the heat sink is connected to the back surface of the heat sink. and a stainless steel heat insulating plate provided on the back side of the synthetic resin heat insulating plate. Since heat dissipation fins that bend toward the heat insulating plate are formed on the peripheral edge, the braking heat of the friction pad is covered by the heat dissipation fins of the heat dissipation plate, which is made of a material with higher thermal conductivity than the back plate and the heat insulating plate, and the heat insulating plate. The braking heat is released from the parts that are not in contact with the brake pads, preventing it from being trapped in the friction pads, and is blocked by two heat insulating plates made of synthetic resin and stainless steel, reducing the transmission of braking heat to the calipers.
Braking heat transfer to the caliper can be reduced without reducing the friction coefficient of the friction pads.

Furthermore, the heat sink, heat sink fins, and stainless steel heat insulator protect the relatively fragile synthetic resin heat insulator from water, mud, etc. that are drawn in when the disk rotates, and prevent the durability of the friction pads from decreasing. do not have.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which FIG. 1 is an exploded perspective view of a friction pad, FIG. 2 is a cross-sectional view of a disc brake, and FIG. 3 is a cross-sectional view taken from FIG. 2. 1... Disc brake, 2... Caliper, 3
...Disc, 9,10...Friction pad, 9a,
10a... Back plate, 12... Heat sink, 12a... Heat sink fin, 13, 14, 15... Heat insulating plate.

Claims (1)

[Scope of utility model registration request] In the friction pad for a disc brake, a heat sink is provided on the back surface of the back plate of the friction pad, and a heat insulating plate is provided on the back surface of the heat sink, and the heat sink is made of a material with higher thermal conductivity than the back plate and the heat insulating plate. a heat insulating board made of synthetic resin interposed on the back surface of the heat sink;
and a stainless steel heat insulating plate provided on the back side of the synthetic resin heat insulating plate, and the heat sink is bent toward the heat insulating plate from the disk insertion side edge to the disk inner peripheral side edge near the disk insertion side edge. A disc brake friction pad characterized by forming heat dissipating fins.