Disc brake

Abstract

The embodiment of the invention provides a disc brake, and relates to the technical field of brakes. The disc brake comprises a disc part, an air drainage part and a brake caliper part. The first disc and the second disc are fixedly arranged on the outer side of the shaft sleeve in a sleeving mode, and the annular shell is arranged between the first disc and the second disc. Air outlet holes are formed in the side face of the first disc, and air inlet holes are formed in the side face of the second disc. The shaft sleeve is rotationally sleeved with the outer lantern ring, the multiple sets of blade plates are obliquely arranged on the outer ring of the outer lantern ring in an annular array mode, and the balancing weight is fixed to the outer ring of the outer lantern ring. The brake caliper part is located outside the disc part to brake the first disc and the second disc. The blade plates rotating relatively enable air in the cavity defined by the first disc, the second disc and the annular shell to flow rapidly, that is to say, rapid circulation of the air through the air outlet holes and the air inlet holes is achieved, the temperature of the first disc and the second disc can be rapidly brought out, and rapid cooling of the first disc and the second disc is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of brakes, and in particular to a disc brake. Background Art

[0002] Disc brakes, also known as disc brakes, are a type of braking system widely used in vehicles, machines or equipment. Disc brakes are mainly composed of brake calipers and discs (brake pads) and are used to brake mechanical equipment.

[0003] During frequent braking of disc brakes, the friction plate on the inside of the caliper rubs against the disc for a long time. The heat generated by the friction cannot be released quickly, which can easily cause thermal decay of the brakes, affecting the braking quality and service life of the brakes. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a disc brake to solve the problem in the related art that during frequent braking of a disc brake, due to the long-term friction between the friction plate inside the caliper and the disc, the heat energy generated by the friction cannot be quickly released, which easily causes the brake to experience thermal decay, affecting the braking quality and service life of the brake.

[0005] A disc brake according to an embodiment of the present application includes: a disc part, an air drainage part and a brake caliper part.

[0006] The disc part includes a shaft sleeve, a first disc, a second disc and an annular shell, the first disc and the second disc are fixedly sleeved on the outer side of the shaft sleeve, and the annular shell is arranged at the outer edge between the first disc and the second disc, a plurality of air outlet holes are arranged on the side of the first disc, and a plurality of air inlet holes are arranged on the side of the second disc; The air guide part includes an outer ring, blades and a counterweight, wherein the outer ring is located between the first disc and the second disc, and the outer ring is rotatably sleeved on the outside of the shaft sleeve, and a plurality of groups of blades are arranged in an annular array and tilted on the outer ring of the outer ring, and the counterweight is fixed on the outer ring of the outer ring; The brake caliper part is located outside the disc part to brake the first disc and the second disc.

[0007] In some embodiments of the present application, the brake caliper part includes a first caliper, a second caliper, a friction plate and an elastic support member, and the first caliper and the second caliper have the same structural specifications, an oil pressurization chamber is provided on the inner side of the second caliper, the friction plate is slidably arranged on the inner side of the oil pressurization chamber, and the elastic support member elastically supports two groups of friction plates, an oil filling port connected to the oil pressurization chamber is provided on the outer side of the second caliper, and a seal is provided between the oil pressurization chamber and the friction plate.

[0008] In some embodiments of the present application, the elastic support member includes a positioning bolt and a spring, the positioning bolt connects the first caliper and the second caliper, and the positioning bolt passes through the friction plate, and the spring is sleeved on the outside of the screw of the positioning bolt located between the two friction plates.

[0009] In some embodiments of the present application, the brake caliper part further includes a fixing bolt, and the fixing bolt connects the first caliper and the second caliper.

[0010] In some embodiments of the present application, mounting holes matching with fixing bolts and positioning bolts are provided on the outer sides of the first caliper and the second caliper.

[0011] In some embodiments of the present application, arc-shaped avoidance grooves for avoiding the bushing are provided in the middle of the first caliper and the second caliper.

[0012] In some embodiments of the present application, the air guide portion further includes balls, and a plurality of groups of the balls are rollingly arranged between the outer ring and the shaft sleeve.

[0013] In some embodiments of the present application, a groove is provided on the outer side of the sleeve, and the ball rolling is arranged inside the groove.

[0014] In some embodiments of the present application, an annular groove is provided on the inner wall of the outer ring, and the ball rolls inside the annular groove.

[0015] In some embodiments of the present application, the plurality of groups of air outlet holes are arranged at an angle on the outer side of the first disc and the plurality of groups of air inlet holes are arranged at an angle on the outer side of the second disc.

[0016] The beneficial effect of the present application is as follows: the present application obtains a disc brake through the above design, and the air circulation can have a good cooling effect on the first disc and the second disc in the air drainage part when the brake caliper part is braking and when the first disc and the second disc rotate again after braking, and the blades that rotate relatively cause the air in the cavity surrounded by the first disc, the second disc, and the ring shell to flow quickly, that is, the air can flow quickly through the air outlet and the air inlet, and the temperature on the first disc and the second disc can be quickly taken out to achieve the first disc and the second disc to complete the rapid cooling. When the air outside the first disc and the second disc flows through the air outlet and the air inlet, it will also cause the air in the inner part of the brake caliper part to flow quickly, and it also has a good cooling protection effect on the brake caliper part, that is, the brake itself has a better cooling protection effect, so that the disc brake has a longer service life.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of the structure of a disc brake according to an embodiment of the present application; Figure 2 is a schematic diagram of the structure of a disc according to an embodiment of the present application; Figure 3 It is a schematic diagram of the structure of the shaft sleeve, the second disc, the annular shell and the air drainage part according to an embodiment of the present application; Figure 4 is a schematic diagram of the shaft sleeve structure according to an embodiment of the present application; Figure 5 is a schematic diagram of the outer sleeve ring and the ball structure according to an embodiment of the present application; Figure 6 is a partial structural schematic diagram of a brake caliper according to an embodiment of the present application; Figure 7 is a schematic diagram of the structure of a second caliper, an elastic support member, a seal, an oil pipe and a heat dissipation blade according to an embodiment of the present application; Figure 8 is a schematic diagram of the second caliper and oil pipe installation structure according to an embodiment of the present application; Fig. 9 is a schematic diagram of the sealing structure according to an embodiment of the present application; Fig.10 It is a schematic diagram of the cross-sectional structure of a seal according to an embodiment of the present application.

[0020] icon: 10-disc part; 110-shaft sleeve; 120-first disc; 130-second disc; 140-ring shell; 150-air outlet; 160-air inlet; 170-groove; 20-air drainage part; 210-outer ring; 220-blade; 230-weight block; 240-ball; 250-ring groove; 30-brake caliper part; 310-first caliper; 311-fixing bolt; 320-second caliper; 321- Oil pressurizing chamber; 322-oil reflux chamber; 323-circulation groove; 330-friction plate; 340-elastic support; 341-positioning bolt; 342-spring; 350-seal; 351-seal ring; 352-middle flange; 353-side flange; 354-first groove; 355-second groove; 360-oil filling port; 370-oil pipe; 380-heat dissipation blade; 391-first oil port; 392-second oil port. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0022] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] A disc brake according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0025] See also Figure 1-Figure 10 According to an embodiment of the present application, a disc brake includes: a disc part 10, an air drainage part 20 and a brake caliper part 30.

[0026] Among them, the brake caliper part 30 cooperates with the disc part 10 to complete braking, and the cooperation of the air drainage part 20 and the disc part 10 can realize the rapid cooling of the brake, that is, the heat generated by friction can be quickly diffused outward, reducing the occurrence of thermal decay, having a better protection effect on the brake, so that the brake can have a longer service life in long-term use.

[0027] See also Figure 1-Figure 3 The disc part 10 includes a sleeve 110, a first disc 120, a second disc 130 and an annular shell 140. The first disc 120 and the second disc 130 are both fixedly sleeved on the outside of the sleeve 110, and the sleeve 110, the first disc 120 and the second disc 130 are fixed by welding. The annular shell 140 is arranged at the outer edge between the first disc 120 and the second disc 130, and the annular shell 140 and the first disc 120 and the second disc 130 are fixed by bolts or welding. A plurality of air outlet holes 150 are arranged on the side of the first disc 120, and a plurality of air inlet holes 160 are arranged on the side of the second disc 130. The air guide part 20 includes an outer sleeve 210, a blade 220 and a counterweight 230. The outer ring 210 is located between the first disc 120 and the second disc 130, and the outer ring 210 is rotatably sleeved on the outside of the shaft sleeve 110, and a plurality of blades 220 are arranged in an annular array and tilted on the outer ring of the outer ring 210, and the counterweight 230 is fixed on the outer ring of the outer ring 210. The brake caliper part 30 is located outside the disc part 10 to brake the first disc 120 and the second disc 130.

[0028] The working principle of the disc brake is as follows: when the brake caliper part 30 brakes the first disc 120 and the second disc 130 on both sides of the disc part 10, the sleeve 110, the first disc 120 and the second disc 130 are synchronously changed from a rotating state to a stationary state, and when the brake caliper part 30 no longer brakes the first disc 120 and the second disc 130, the sleeve 110, the first disc 120 and the second disc 130 are in a rotating state again. During the rotation of the sleeve 110, the first disc 120 and the second disc 130, since the outer sleeve 210 in the air guide part 20 is arranged to rotate with the sleeve 110, the blade 220 and the counterweight 230 outside the outer sleeve 210 are in a stationary state or a relatively slow rotating state. That is, the first disc 120 and the second disc 130 outside the sleeve 110 and the blade 220 outside the outer ring 210 rotate relative to each other. Under the guidance of the inclined blade 220 outside the outer ring 210, the external air enters the cavity surrounded by the first disc 120, the second disc 130 and the annular shell 140 through the air inlet 160 on the side of the second disc 130, and the gas inside the cavity flows out through the air outlet 150 outside the first disc 120. This air circulation can have a good cooling effect on the first disc 120 and the second disc 130 in the air guide part 20 when the brake caliper part 30 is braking and when the first disc 120 and the second disc 130 rotate again after braking. The relatively rotating blade 220 causes the air in the cavity surrounded by the first disc 120, the second disc 130 and the ring shell 140 to flow quickly, that is, the air can flow quickly through the air outlet 150 and the air inlet 160, and the temperature on the first disc 120 and the second disc 130 can be quickly taken out to achieve rapid cooling of the first disc 120 and the second disc 130. It has a good cooling protection effect on the first disc 120 and the second disc 130.

[0029] When the air outside the first disc 120 and the second disc 130 flows through the air outlet 150 and the air inlet 160, the air in the inner part of the brake caliper part 30 will also flow quickly, which has a good cooling and protective effect on the brake caliper part 30, that is, the brake itself has a better cooling and protective effect, so that the disc brake has a longer service life.

[0030] In the above specific implementation, please refer to Figure 6-Figure 8The brake caliper part 30 includes a first caliper 310, a second caliper 320, a friction plate 330 and an elastic support member 340, and the first caliper 310 and the second caliper 320 have the same structural specifications. That is, the first caliper 310 and the second caliper 320 have the same specifications, and the brake caliper part 30 is divided into two opposing left and right parts. An oil pressurizing chamber 321 is provided inside the second caliper 320, and the friction plate 330 is slidably provided inside the oil pressurizing chamber 321, and the elastic support member 340 elastically supports the two groups of friction plates 330. An oil filling port 360 connected to the oil pressurizing chamber 321 is provided outside the second caliper 320, and a seal 350 is provided between the oil pressurizing chamber 321 and the friction plate 330.

[0031] In this embodiment, the oil is pressurized into the oil pressurizing chamber 321 inside the second caliper 320 through the oil filling port 360, and the oil inside the oil pressurizing chamber 321 is pressurized. The pressurized oil inside the oil pressurizing chamber 321 will squeeze the friction plate 330 close to the first disc 120 and the second disc 130 in the disc part 10, until the friction plate 330 contacts the first disc 120 and the second disc 130, and plays a role of friction braking. When the two friction plates 330 approach each other to squeeze the first disc 120 and the second disc 130, the elastic support member 340 will also be pressurized. When the oil pressure inside the oil pressurizing chamber 321 decreases, under the elastic support of the elastic support member 340, the two friction plates 330 move away from each other, that is, there is a gap between the friction plate 330 and the first disc 120 and the second disc 130 again, and the sleeve 110, the first disc 120, and the second disc 130 can rotate normally again.

[0032] Furthermore, the elastic support member 340 includes a positioning bolt 341 and a spring 342. The positioning bolt 341 connects the first caliper 310 and the second caliper 320, and the positioning bolt 341 passes through the friction plate 330, and the spring 342 is sleeved on the outside of the screw of the positioning bolt 341 located between the two friction plates 330. The positioning bolt 341 is used to connect the first caliper 310 and the second caliper 320, and at the same time, the positioning bolt 341 is also used to limit the two friction plates 330. The spring 342 outside the positioning bolt 341 is used to elastically support the two friction plates 330, that is, to elastically support and reset the friction plates 330.

[0033] Specifically, the brake caliper part 30 further includes a fixing bolt 311, which connects the first caliper 310 and the second caliper 320. The first caliper 310 and the second caliper 320 are both provided with mounting holes on the outside thereof, which match the fixing bolt 311 and the positioning bolt 341. The fixing bolt 311 passes through the mounting holes on the first caliper 310 and the second caliper 320 to fix the first caliper 310 and the second caliper 320, that is, the first caliper 310 and the second caliper 320 are detachably fixedly installed.

[0034] In the specific configuration, arc-shaped avoidance grooves for avoiding the shaft sleeve 110 are arranged in the middle of the first caliper 310 and the second caliper 320. The end of the shaft sleeve 110 is located inside the arc-shaped avoidance groove.

[0035] In the above specific implementation, please refer to Figure 4 and Figure 5 The air guide part 20 further includes balls 240, and multiple groups of balls 240 are rollingly arranged between the outer sleeve 210 and the shaft sleeve 110. Multiple groups of elastic support members 340 are arranged in an annular array outside the shaft sleeve 110 to reduce the friction generated by the rotation between the outer sleeve 210 and the shaft sleeve 110, so that the outer sleeve 210 and the shaft sleeve 110 can rotate more lubricatedly.

[0036] Furthermore, a groove 170 is provided on the outer side of the sleeve 110, and the ball 240 is arranged to roll inside the groove 170. An annular groove 250 is provided on the inner wall of the outer ring 210, and the ball 240 rolls inside the annular groove 250. The provision of the groove 170 and the annular groove 250 can improve the stability of the ball 240 when rolling, that is, the ball 240 rolls more stably between the outer ring 210 and the sleeve 110.

[0037] Specifically, the plurality of air outlet holes 150 are arranged obliquely on the outside of the first disc 120 and the plurality of air inlet holes 160 are arranged obliquely on the outside of the second disc 130. The arrangement of the plurality of air outlet holes 150 and the air inlet holes 160 allows air to flow more easily along the air outlet holes 150 and the air inlet holes 160 during rotation.

[0038] The above-mentioned disc brake can improve the air circulation performance by rotating the outer ring 210 and the blade 220 to improve the overall cooling effect of the brake. If the cooling effect of the disc brake can be further improved, the disc brake will have a better cooling protection effect.

[0039] In the above specific implementation, please refer to Figure 6-Figure 8 The brake caliper part 30 also includes an oil pipe 370 and a heat dissipation blade 380. An oil reflux chamber 322 is provided inside the lower section of the second caliper 320, and a first oil port 391 and a second oil port 392 connected to the oil reflux chamber 322 are provided on the outer side of the second caliper 320. A plurality of heat dissipation blades 380 distributed radially along the shaft sleeve 110 are provided on the inner side of the lower section of the second caliper 320, and the heat dissipation blades 380 on the inner side of the first caliper 310 and the second caliper 320 are integrally formed. A circulation groove 323 connected to the oil reflux chamber 322 is provided inside the heat dissipation blade 380, and both ends of the oil pipe 370 are connected to the oil filling port 360 and the second oil port 392 respectively.

[0040] In this embodiment, the oil return chamber 322 in the first caliper 310 and the second caliper 320 is located at the bottom after the brake is installed. The externally pressurized oil enters the oil return chamber 322 through the first oil port 391, and the over-pressurized oil in the oil return chamber 322 enters the oil pressurizing chamber 321 through the oil pipe 370 and the oil filling port 360. After the oil pressure in the oil pressurizing chamber 321 is increased, it will squeeze the friction plate 330 on one side, and the squeezed friction plate 330 will contact and rub with the first disc 120 and the second disc 130, thereby playing a braking role.

[0041] When the friction plate 330 contacts the first disc 120 and the second disc 130 for friction braking, the heat generated can be quickly absorbed by the oil in the circulation groove 323 inside the heat dissipation blade 380, and finally the oil in the circulation groove 323 is mixed with the oil in the oil return chamber 322, that is, the heat absorbed by the heat dissipation blade 380 can be quickly transferred to the oil in the oil return chamber 322, which plays a role in rapid cooling. When the oil pressure in the oil pressurizing chamber 321 drops, the oil in the oil pressurizing chamber 321 will enter the oil return chamber 322 through the oil filling port 360 and the oil pipe 370, and the oil in the oil return chamber 322 will be replaced by oil at a lower temperature, which can quickly transfer the heat absorbed by the heat dissipation blade 380, that is, it can further improve the cooling effect. When the oil in the oil pressurizing chamber 321 enters the oil reflux chamber 322 through the oil filling port 360 and the oil pipe 370, the oil in the oil reflux chamber 322 that has absorbed heat is discharged through the first oil port 391 to the oil pump system for cooling. When the oil in the oil pump system is pumped out to the oil reflux chamber 322 again after cooling, it will have a lower temperature. This allows the heat dissipation blades 380 to have a better absorption and cooling effect, and even during frequent braking, the disc brake has a better cooling and braking effect. While the heat dissipation blades 380 cooperate with the oil in the oil return chamber 322 to quickly absorb heat, the subsequent rotating shaft sleeve 110, the first disc 120, and the second disc 130 will also drive the internal outer ring 210 and the blade 220 to rotate. The rotating blade 220 generates rapid air circulation, and the heat dissipation blades 380 and the oil in the oil return chamber 322 cool the brake together, which can further improve the cooling efficiency of the brake. Even if the brake is frequently braked to generate more heat, the disc brake can also be cooled quickly.

[0042] In addition to the rotating outer ring 210 and blade 220 being able to circulate air and the heat dissipation blades 380 and the oil inside the oil return chamber 322 to conduct heat for cooling. The rotating blade 220 also allows the air around the air outlet holes 150 and the air inlet holes 160 on the sides of the first disc 120 and the second disc 130 to circulate quickly. At this time, the rapidly circulating air will contact the heat dissipation blades 380 inside the first caliper 310 and the second caliper 320. The air circulates quickly around the heat dissipation blades 380, and at the same time, the heat in the heat dissipation blades 380 is quickly dispersed, that is, the heat in the heat dissipation blades 380 and the oil inside the oil return chamber 322 is quickly cooled, and the cooling speed of the heat dissipation blades 380 and the oil return chamber 322 is increased, so as to achieve a further improvement in the cooling effect of the disc brake in coordination, so that the disc brake has a better service life.

[0043] If the seal 350 provided in the oil pressure chamber 321 inside the first caliper 310 and the second caliper 320 in the above-mentioned disc brake is an ordinary sealing gasket, then during long-term use of the brake, it is easy to cause a poor sealing effect between the second caliper 320 and the friction plate 330, and the oil is easy to leak from the gaps between the sealing gasket and the friction plate 330 and between the first caliper 310 and the second caliper 320.

[0044] For specific settings, see Figure 7 , Fig. 9 and Fig.10 The sealing member 350 includes a sealing ring 351, a middle flange 352 is provided in the middle of the outer ring of the sealing ring 351, and side flanges 353 are provided on both sides of the outer ring of the sealing ring 351. The sealing ring 351, the middle flange 352, and the side flanges 353 are integrally formed. A first groove 354 is provided inside the sealing ring 351, and a second groove 355 communicating with the first groove 354 is provided on the inner wall of the middle flange 352.

[0045] This embodiment is as follows: compared with the traditional sealing gasket, the outer periphery of the sealing ring 351 is provided with a side flange 353 and a middle flange 352 in an alternating manner, so that the outer periphery of the sealing ring 351 has a better sealing effect. After the oil enters the oil pressurizing chamber 321 through the oil filling port 360, the pressurized oil in the oil pressurizing chamber 321 will be tightly squeezed in the first groove 354 and the second groove 355. The oil pressure at the side wall of the first groove 354 and the oil pressure at the side wall and bottom wall of the second groove 355 enable the outer wall of the sealing ring 351 to fit more closely with the contact surface, that is, while the oil in the oil pressurizing chamber 321 is pressurized, the overall sealing effect of the sealing element 350 is improved, so that the sealing element 350 can play a better sealing role.

[0046] The side flange 353 is a pyramid-shaped structure protruding outward. The side flange 353 is arranged in multiple groups, which can further enhance the sealing effect of the seal 350, so that the oil inside the disc brake has a better sealing effect when pressurized.

[0047] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0048] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A disc brake, characterized in that: include: A disc portion (10), the disc portion (10) comprising a shaft sleeve (110), a first disc (120), a second disc (130) and an annular shell (140), the first disc (120) and the second disc (130) both being fixedly sleeved on the outside of the shaft sleeve (110), and the annular shell (140) being arranged at the outer edge between the first disc (120) and the second disc (130), a plurality of air outlet holes (150) being arranged on the side surface of the first disc (120), and a plurality of air inlet holes (160) being arranged on the side surface of the second disc (130); an air guide portion (20), the air guide portion (20) comprising an outer sleeve (210), blades (220) and a counterweight (230), the outer sleeve (210) being located between the first disc (120) and the second disc (130), and the outer sleeve (210) being rotatably sleeved on the outside of the shaft sleeve (110), a plurality of groups of blades (220) being obliquely arranged in a ring-shaped array on the outer ring of the outer sleeve (210), and the counterweight (230) being fixed on the outer ring of the outer sleeve (210); A brake caliper portion (30) is located outside the disc portion (10) to brake a first disc (120) and a second disc (130).

2. A disc brake according to claim 1, characterized in that: The brake caliper part (30) comprises a first caliper (310), a second caliper (320), a friction plate (330) and an elastic support member (340), and the first caliper (310) and the second caliper (320) have the same structural specifications. An oil pressurizing chamber (321) is arranged inside the second caliper (320), and the friction plate (330) is slidably arranged inside the oil pressurizing chamber (321). The elastic support member (340) elastically supports two groups of friction plates (330). An oil filling port (360) connected to the oil pressurizing chamber (321) is arranged outside the second caliper (320), and a sealing member (350) is arranged between the oil pressurizing chamber (321) and the friction plate (330).

3. A disc brake according to claim 2, characterized in that: The elastic support member (340) comprises a positioning bolt (341) and a spring (342); the positioning bolt (341) connects the first caliper (310) and the second caliper (320), and the positioning bolt (341) penetrates the friction plate (330); and the spring (342) is sleeved on the outside of the screw of the positioning bolt (341) located between the two friction plates (330).

4. A disc brake according to claim 3, characterized in that: The brake caliper part (30) further comprises a fixing bolt (311), wherein the fixing bolt (311) connects the first caliper (310) and the second caliper (320).

5. A disc brake according to claim 4, characterized in that: The first caliper (310) and the second caliper (320) are both provided with mounting holes on their outer sides, which are matched with the fixing bolts (311) and the positioning bolts (341).

6. A disc brake according to claim 2, characterized in that: The first caliper (310) and the second caliper (320) are provided with arc-shaped avoidance grooves in the middle for avoiding the shaft sleeve (110).

7. The disc brake according to claim 1, characterized in that: The air guide portion (20) further comprises rolling balls (240), and a plurality of groups of the rolling balls (240) are rollingly arranged between the outer ring (210) and the shaft sleeve (110).

8. A disc brake according to claim 7, characterized in that: A groove (170) is arranged on the outside of the shaft sleeve (110), and the ball (240) is arranged to roll inside the groove (170).

9. A disc brake according to claim 8, characterized in that: An annular groove (250) is provided on the inner wall of the outer ring (210), and the ball (240) rolls inside the annular groove (250).

10. The disc brake according to claim 1, characterized in that: The plurality of groups of air outlet holes (150) are arranged at an angle on the outside of the first disc (120) and the plurality of groups of air inlet holes (160) are arranged at an angle on the outside of the second disc (130).

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