TW201400728A - Brake pad structure of hydraulic brake - Google Patents

Abstract

A brake pad structure of hydraulic brake of the present invention includes a back plate, a friction material and a heat dissipation device. The back plate has a first heat transfer coefficient. The heat dissipation device comprises a connecting portion and a heat dissipation portion. The connecting portion is disposed between the back plate and the friction material. The heat dissipation portion is exposed outside of a housing. The heat dissipation device has a second heat transfer coefficient. The first heat transfer coefficient is greater than the second heat transfer coefficient. Whereby, the thermal energy of the friction material is transferred to air by the heat dissipation device. The present invention can avoid the temperature of the friction material rising too high and the thermal energy of it transferring to the hydraulic fluid of an oil pressure cylinder. The present invention can prevent brake failure.

Description

Brake pad structure for hydraulic brake

The invention relates to a brake pad structure of a hydraulic brake, in particular to a brake pad structure of a hydraulic brake for a vehicle disc.

In the case of the conventional bicycle hydraulic brake structure, the friction material will always rub the disc to generate high temperature. The higher the temperature of the friction material will affect the temperature of the hydraulic system, so the higher the temperature, the worse the braking effect is. The brake structure is prone to brake failure.

In this regard, there are many conventional hydraulic brake structures with heat sinks on the back plate, such as TWM436108, US7905335, or a heat sink above the shrapnel, such as TW201229401, to quickly dissipate the temperature of the friction material to prevent it. The brakes are out of order. However, the friction material temperature of the above-mentioned conventional brake structure needs to be transmitted to the heat sink through the back plate, and the heat dissipation speed of the indirect heat dissipation method is slow and the effect is not satisfactory.

TW201210884 can solve the above problem of the conventional hydraulic brake structure, which mainly provides a cooling plate member between the friction material and the back plate. However, the cooling plate member is in direct contact with the back plate, and the thermal energy of the cooling plate member is quickly transmitted to the back plate, and the back plate is quickly transmitted to the hydraulic cylinder after absorbing a large amount of heat energy transmitted from the cooling plate member. The hydraulic oil causes the hydraulic oil in the hydraulic cylinder to deteriorate due to high temperature. Once the hydraulic oil deteriorates, the brake will be malfunctioning.

Secondly, a base portion is further disposed between the friction material and the cooling plate member, Although the base part has a heat transfer effect, the rivet part of the base part directly contacts the piston of the hydraulic cylinder, so that the heat energy of the friction material is directly transmitted to the hydraulic cylinder more quickly, resulting in hydraulic oil in the hydraulic cylinder. Deteriorated due to high temperatures.

Furthermore, the friction material is integrally fixed to the base portion, and although the base portion can provide some heat dissipation effect, the heat dissipation fins which can effectively dissipate a large amount of heat are provided on the top of the cooling plate member, that is, the heat energy of the friction material. It must pass through the base part to further dissipate heat through the heat dissipating fins, and the heat dissipation effect is slow and the effect is not good.

In addition, there is a hydraulic brake structure, as shown in TWM343085, whose back plate is made of materials with different heat transfer coefficients, so that the back plate has excellent heat dissipation effect. However, the heat energy of the friction material is transmitted through the back plate. To dissipate heat, that is, the backboard still has a high probability of transferring part of the heat energy to the hydraulic cylinder, and the hydraulic oil in the hydraulic cylinder is likely to rise and deteriorate.

Therefore, it is necessary to design a brake pad structure that is fast in heat dissipation and prevents the heat energy of the friction material from being transmitted to the hydraulic brake of the hydraulic cylinder.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a brake pad structure for a hydraulic brake that has a high heat dissipation rate and prevents the brake failure of the present invention.

In order to achieve the above object, the brake pad structure of the hydraulic brake of the present invention comprises a back plate, a friction material and a heat sink.

The backboard has a first heat transfer coefficient, and the backboard includes a first surface and a second surface, the second surface being urged against the hydraulic cylinder.

The friction material is in frictional friction with the brake disc.

The heat dissipating device includes a joint portion and a heat dissipating portion. The joint portion of the heat dissipating device is disposed between the back plate and the friction material, and the heat dissipating portion is exposed to the outside.

The heat sink has a second heat transfer coefficient, and the second heat transfer coefficient is greater than the first heat transfer coefficient.

Thereby, the brake pad structure of the hydraulic brake of the present invention can directly transfer the heat energy of the friction material to the air by the heat dissipating device, prevent the temperature of the friction material from being excessively high and the heat energy of the friction material is transmitted to the hydraulic cylinder. The hydraulic oil is used to prevent the brake failure of the present invention.

Referring to FIG. 1, in a first embodiment of the present invention, the brake pad structure 10 of the hydraulic brake of the present invention comprises a backing plate 20, a friction material 40 and a heat sink 30.

The back plate 20 includes a first surface 21 and a second surface 22. The first surface 21 of the back plate 20 is convexly disposed with a fixing portion 211. The second surface 22 of the back plate 20 is recessed with a heat dissipation groove 221. Preferably, the heat dissipation groove 221 extends laterally and extends through the back plate. On both sides of 20. The backing plate 20 has a first heat transfer coefficient. The material of the back plate 20 may be, but not limited to, a steel metal.

The friction material 40 is in frictional friction with the brake disc.

The heat dissipating device 30 includes a joint portion 31 and a heat dissipating portion 32. The joint portion 31 of the heat dissipating device 30 is disposed between the back plate 20 and the friction material 40, and the heat dissipating portion 32 is exposed to the outside. More specifically, the fixing portion 211 is recessed and recessed. In the slot 211a, the fixing portion 211 is C-shaped, and the opening of the recess 211a faces the top of the backboard 20. The joint portion 31 defines a hole 311. The joint portion 31 includes a block 312. The wall of the hole 311 extends in a first direction, and the contour of the hole 311 corresponds to the fixing portion 211. The contour of the block 312 corresponds to the groove 211a. The block 312 is embedded in the groove 211a. The fixing portion 211 is embedded in the hole 311 , and the joint portion 31 is fixed to the fixing portion 211 . The heat dissipating portion 32 includes a heat dissipating plate 321 and a heat sink 322. The heat dissipating plate 321 is coupled to the joint portion 31 and exposed to the outside. The heat dissipating plate 321 and the joint portion 31 may be integrally formed or detachable. The heat dissipating plate 321 and the bonding portion 31 are made of copper or a copper-containing alloy. Among them, the brake pad structure 10 of the hydraulic brake of the present invention further includes a latch 50, and the latch 50 passes through the back plate. The heat sink is as shown in FIG. 2, whereby the joint portion 31 is fixed to the first surface 21 of the backboard 20. In the second embodiment, the heat dissipation plate 321 is in the form of a sheet and can be manually bent by a user to form at least one bent portion (see FIG. 6). Of course, if the heat dissipation portion is bent into another shape, it may be omitted. The heat sink 322 is disposed on the heat dissipation plate 321 . The heat sink 322 has a plurality of fins, and grooves are formed between the fins. The heat sink 30 has a second heat transfer coefficient, and the second heat transfer coefficient is greater than the first heat transfer coefficient. More specifically, the heat sink 30, the heat sink 321 and the heat sink 322 may be For the same material, at least two of them may be different materials, or the materials of the three materials are different. When the heat sink 30, the heat sink 321 and the heat sink 322 are at least two or three materials. At the same time, the second heat transfer coefficient is the joint portion 31, The equivalent heat transfer coefficient of the material of the heat sink 321 and the heat sink 322.

Referring to FIG. 2 and FIG. 3, the brake pad structure 10 of the hydraulic brake of the present invention is mounted in pairs on a disc of a vehicle, and the disc includes two housings 60, four pistons 70 and the latch 50. The two housings 60 are each formed with two hydraulic cylinders 61 that are slidably received in the respective hydraulic cylinders 61. The two back plates 20 are disposed between the pistons 70 , and the pins 50 are disposed through the two housings 60 , the two heat dissipation plates 321 , and the two back plates 20 .

Referring to FIG. 4 and FIG. 5, in the braking process of the present invention, the two friction material 40 is provided with a brake disc 90, as shown in FIG. 5, for the purpose of deceleration, and the temperature of the friction material 40 is gradually increased. At this time, the thermal energy of the friction material 40 directly transmits the joint portion 31. The joint portion 31 directly dissipates the absorbed heat energy to the air, and further transmits the heat dissipating portion 32. The heat dissipating plate 321 of the heat dissipating portion 32 is The heat sink 322 conducts heat energy into the surrounding air. Since the heat sink 322 of the heat radiating portion 32 has a large surface area and has a better heat dissipation effect, the friction material 40 can be effectively prevented from being braked due to excessive temperature.

Since the second heat transfer coefficient is greater than the first heat transfer coefficient, the thermal energy of the friction material 40 is quickly dissipated after being transferred to the heat sink 30, and only a small portion of the heat energy is transferred to the backing plate 20, thereby preventing Excessive heat energy is transmitted to the hydraulic cylinder 61 through the back plate 20, so that the hydraulic oil in the hydraulic cylinder 61 is deteriorated due to high temperature, thereby preventing the brake from malfunctioning.

Moreover, the heat dissipating recess 221 of the second surface 22 of the backing plate 20 allows gas to flow through the inside thereof to further increase the heat dissipation effect of the backing plate 20, and indirectly enhance friction. The heat dissipation rate of the material 40. In addition, the thermal energy of the piston 70 can also be quickly dissipated into the air by the gas passing through the heat dissipating groove 221, thereby preventing the hydraulic oil in the hydraulic cylinder 61 from being deteriorated due to high temperature and causing brake failure.

Further, the heat dissipating plate 321 and the joint portion 31 are integrally formed into a small and thin volume, whereby the overall thickness of the present invention is relatively thin and is suitable for being mounted in a casing 60 of a general size.

Moreover, the heat dissipation plate 321 can be manually bent. When the present invention is mounted on the housing 60, the heat dissipation portion 32 is exposed outside the housing 60, whereby the user can manually bend the heat dissipation plate 321 The portion of the heat dissipating portion 32 protruding from the housing is less likely to protrude too much, so that the structure of the entire heat dissipating device 30 can be adjusted arbitrarily with the use space, as shown in FIG.

Referring to FIG. 7 and FIG. 8 , in the third embodiment of the present invention, the brake pad structure of the hydraulic brake may further include a heat insulation layer 100 , and the heat insulation layer 100 is disposed on the first back plate 20 . The surface 21, the heat insulation layer 100 has a third heat transfer coefficient, the third heat transfer coefficient is smaller than the first heat transfer coefficient and the second heat transfer coefficient, and the heat insulation layer 100 is located on the back plate 20 and the heat sink Between the joint portions 31, the heat insulation layer 100 can prevent heat energy from being transmitted from the heat sink to the back plate, thereby preventing further transfer of heat energy to the hydraulic cylinder 61, resulting in deterioration of the hydraulic oil in the oil pressure cylinder 61. The brakes are out of order. More preferably, the brake pad structure 10 of the hydraulic brake of the present invention further includes a heat insulation package 200, the heat insulation package 200 is disposed on the back plate 20 and the heat dissipation plate 321 of the heat dissipation device, and the plug 50 is inserted in the heat dissipation plate 321 The heat insulation kit 200 and the back panel 20, the heat insulation kit 200 has a fourth heat transfer coefficient, the first The fourth heat transfer coefficient is smaller than the first heat transfer coefficient and the second heat transfer coefficient, whereby the heat energy of the heat sink is blocked by the heat insulating package 200 and is not easily transmitted to the back plate 20 through the plug 50, thereby preventing further heat transfer. Go to the hydraulic cylinder 61.

In summary, the brake pad structure of the hydraulic brake of the present invention not only has an excellent rapid heat dissipation effect, but also has the effect of transmitting heat insulation energy to the hydraulic cylinder, completely preventing the occurrence of brake failure, and is in fact consistent with the patent law. The prescribed invention.

10‧‧‧ brake pad structure for hydraulic brakes

20‧‧‧ Backplane

21‧‧‧ first surface

211‧‧‧ Fixed Department

211a‧‧‧ slotted

22‧‧‧ second surface

32‧‧‧ Department of heat dissipation

321‧‧‧heating plate

322‧‧‧heatsink

40‧‧‧ Friction material

50‧‧‧ latch

60‧‧‧shell

221‧‧‧heating groove

30‧‧‧heating device

31‧‧‧Combination

311‧‧‧ hole

312‧‧‧Block

61‧‧‧Hydraulic cylinder

70‧‧‧Piston

90‧‧‧ brake disc

100‧‧‧Insulation

200‧‧‧Insulation kit

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded view of a first embodiment of the present invention.

Figure 2 is an exploded view of the first embodiment of the present invention in combination with a bicycle dish device.

Figure 3 is a perspective view of a first embodiment of the present invention in combination with a bicycle dish device.

Figure 4 is a perspective view of a first embodiment of the present invention.

Figure 5 is a schematic view of the brake of the first embodiment of the present invention.

Figure 6 is a perspective view of a second embodiment of the present invention.

Figure 7 is an exploded view of a third embodiment of the present invention.

Figure 8 is a perspective view of a third embodiment of the present invention.

10‧‧‧ brake pad structure for hydraulic brakes

20‧‧‧ Backplane

21‧‧‧ first surface

211‧‧‧ Fixed Department

211a‧‧‧ slotted

22‧‧‧ second surface

221‧‧‧heating groove

30‧‧‧heating device

31‧‧‧Combination

311‧‧‧ hole

312‧‧‧Block

32‧‧‧ Department of heat dissipation

321‧‧‧heating plate

322‧‧‧heatsink

40‧‧‧ Friction material

Claims (10)

A brake pad structure for a hydraulic brake includes: a back plate having a first heat transfer coefficient, the back plate including a first surface and a second surface, the second surface being urged against the hydraulic cylinder; a friction material, the friction material is in frictional friction with the brake disc; a heat dissipating device includes a joint portion and a heat dissipating portion, wherein the joint portion of the heat dissipating device is disposed between the back plate and the friction material, and the heat dissipating portion is exposed Externally; wherein the heat sink has a second heat transfer coefficient, the second heat transfer coefficient being greater than the first heat transfer coefficient. The brake pad structure of the hydraulic brake according to claim 1, wherein the heat dissipating portion comprises a heat dissipating plate coupled to the joint portion and exposed to the outside. The brake pad structure of the hydraulic brake according to claim 2, wherein the heat dissipation plate and the joint portion are made of copper or a copper-containing alloy. The brake pad structure of the hydraulic brake according to claim 2, wherein the heat dissipating portion comprises a heat sink, and the heat sink is disposed on the heat dissipating plate. The brake pad structure of the hydraulic brake according to claim 2, wherein the heat dissipation plate has a sheet shape and can be manually bent to form at least one bent portion. The brake pad structure of the hydraulic brake according to claim 1, wherein the first surface of the back plate is convexly provided with a fixing portion, and the joint portion is fixed to the fixing portion. The brake pad structure of the hydraulic brake according to claim 6, wherein the fixing portion is recessed with a slot, the joint portion defines a hole, and the joint portion comprises a block, the block from the hole wall of the hole Extending in a first direction, the contour of the hole corresponding to the solid a fixed portion, the contour of the insert corresponding to the recess. The brake pad structure of the hydraulic brake according to claim 1, further comprising a heat insulation layer disposed on the first surface of the back plate, the heat insulation layer having a third heat transfer coefficient, the first The three heat transfer coefficients are smaller than the first heat transfer coefficient and the second heat transfer coefficient. The brake pad structure of the hydraulic brake according to claim 1, wherein the second surface of the back plate is recessed with a heat dissipation groove. The brake pad structure of the hydraulic brake according to claim 1, further comprising an insulation kit and a latch, the heat insulation kit is disposed on the backboard and the heat dissipation device, and the latch is inserted into the heat insulation kit. The thermal insulation kit has a fourth heat transfer coefficient that is less than the first heat transfer coefficient and the second heat transfer coefficient.