Disc hydraulic anti-lock brake and brake system

[0061] Implementation mode one

[0062] Such as Figure 1 to Figure 9 , Figure 13 to Figure 21 As shown, the present invention provides a disc hydraulic anti-lock brake, which includes a bracket 400, a first piston 501, a second piston 506, an elastomer 505, a brake pad 800, a brake disc 900, a brake release system, and an anti-lock brake. Dead brake system. Wherein, the first piston 501 is received in the first cavity 415 of the bracket 400, and the first piston 501 can move axially in the first cavity 415, and the second piston 506 is accommodated in the second cavity 504 of the first piston 501. In addition, the second piston 506 can move axially in the second cavity 504, and the end cover 509 is provided at the opening of the second cavity 504 and is fixedly connected with the second cavity 504 to restrict the first piston 501 and the second piston 506 The elastic body 505 is arranged between the second piston 506 and the bottom of the second cavity 504 to apply pressure to the first piston 501 and the second piston 506. The brake pad 800 is fixed on the brake pad seat of the bracket 400 It can be moved by the abutment force of the first piston 501 or the second piston 506. The brake pad 800 can also be provided with brake pads. The brake disc 900 is fixed on the axle 102 through the mounting portion to receive the brake pad 800 The applied friction force drives the axle 102 to decelerate or stop rotating, thereby realizing deceleration or stopping of the motor vehicle. The brake release system is used to inject or discharge hydraulic oil into the second cavity 508, to realize the contact or separation of the brake pad 800 and the brake disc 900 by the second piston 506, and to release or restore the brake. The anti-lock brake system is used The pressure that the first piston 501 drives the brake pad 800 to press against the brake disc 900 is changed to achieve the purpose of anti-locking.

[0063] Specific, such as Figure 1 to Figure 9 , Figure 13 to Figure 20 As shown, the bracket 400 is provided with a first cavity 415, a channel, a core tube 502, a brake pad seat provided at the opening of the first cavity 415, and a mounting portion 418 for mounting the bracket 400 to the axle 102. The channel includes a One passage 406 (that is, the service brake oil passage), the second passage 412 (that is, the parking brake oil passage), and the third passage 409 (that is, the oil return passage). The second passage 412 is in communication with the core tube 502; The piston 501 is arranged in the first cavity 415. A first cavity is formed between the first piston 501 and the bottom of the first cavity 415. The first cavity passes through the first passage 406 and the first pipeline 201 (ie, the service brake pipeline). ) Is connected to the service brake valve, the first piston 501 is provided with a second cavity 504; the second cavity 504 is provided with an end cover 509 (that is, the second cavity is fixedly connected to the end cover), and the outer side of the end cover 509 is fixed with the first piston 501 Connected, the inner side of the end cover 509 is provided with a sealing device, the top of the end cover 509 is provided with a screwing device, the side wall of the second piston 506 is provided with a passage 511, and the second piston 506 is sealed through the inner side of the end cover 509 and extends on the first In the two holes 504, the end of the core tube 502 away from the second channel 412 passes through the first piston 501 and is inserted into the second piston 506. A second cavity 508 is formed between the second piston 506 and the end cover 509. 508 communicates with the parking brake valve through the passage 511, the core tube 502, the second passage 412, and the second pipeline 202 (that is, the parking brake pipeline); the elastic body 505 is arranged in the second piston 506 and the second cavity Between the bottom of the 504; the brake pad 800 is set on the brake pad seat; the brake disc 900 is provided with a counting ring gear 901 and a mounting part. The mounting part of the brake disc 900 is fixed on the output shaft of the axle 102; the brake system is released , Including the pump 315 and the unloading valve 322 arranged on the support 400 and/or the frame of the motor vehicle. The liquid inlet of the pump 315 is connected with the liquid container 103 through the third pipeline 203 (that is, the oil return pipeline), and the outlet of the pump 315 The liquid port communicates with the second cavity 508 through the second channel 412 and the core tube 502; the liquid inlet of the unloading valve 322 communicates with the second cavity 508 through the second channel 412 and the core tube 502, and the liquid outlet of the unloading valve 322 It communicates with the liquid container 103 through the third pipeline 203; the anti-lock brake system includes a counting sensor arranged on the bracket 400 and/or the frame of the motor vehicle (the counting sensor seat 419 can be arranged on the bracket 400 and/or the frame, Used to fix the counting sensor), the motor 309 and the drain valve 310 arranged on the bracket 400 and/or the frame of the motor vehicle, the counting ring gear arranged on the brake disc 900, the outlet of the drain valve 310 and the liquid container 103 Connected, the liquid inlet of the drain valve 310 communicates with the first cavity through the third channel 409. When the counting sensor detects that the rotation speed of the counting ring reaches the set count value, the motor 309 starts and drives the drain valve 310 to work. The first cavity and the third pipeline 203 and the oil circuit of the liquid container 103 are connected and disconnected (that is, the first cavity and the liquid container 103 are alternately connected and disconnected), and the first piston is realized The pressure to compress the brake disc is continuously increasing and decreasing to achieve anti-lock.

[0064] Among them, such as Figure 13 , Figure 18 , Figure 19 with Picture 20 As shown, the brake release system and the anti-lock brake system can also be combined into a whole, called a relay valve 300. The relay valve 300 is arranged on the bracket 400 and/or the frame of the motor vehicle. The relay valve 300 can be combined with the first The first channel 406, the second channel 412, and the third channel 409 are directly connected, and the relay valve 300 can also be connected to the first channel 406, the second channel 412, and the third channel 409 through pipelines; it has multiple disc hydraulic anti-lock The braking system of the dead brake can share a relay valve 300, and each brake of the braking system can also use a relay valve 300 separately. Specifically, the relay valve 300 is arranged on the bracket 400 or the frame, and includes a housing 301, one side of which is provided with an upper interface 302, a middle interface 306, and a lower interface 311 from top to bottom, and the other side from top to bottom. Two upper branch interfaces 304, two middle branch interfaces 308, and two lower branch interfaces 313 are respectively provided underneath. The upper interface 302 and the two upper branch interfaces 304 form an upper oil path 303 and an upper interface of the upper oil path 303 302 is connected to the first pipeline 201, the two upper branch interfaces 304 of the upper oil path 303 are respectively connected to both ends of the first passage 406, the middle interface 306 and the two middle branch interfaces 308 form a middle oil path 307, a middle oil path 307 The middle port 306 is connected to the third pipeline 203, the two middle branch ports 308 of the middle oil path 307 are respectively connected to both ends of the third passage 409, and the lower port 311 and the two lower branch ports 313 form a lower oil path 312, The lower interface 311 of the lower oil passage 312 is connected to the second pipeline 202, and the two lower branch interfaces 313 of the lower oil passage 312 are respectively connected to two ends of the second passage 412.

[0065] Furthermore, a pressure sensor 314 is provided on the housing 301 of the relay valve 300, and the pressure sensor 314 is provided on the lower oil passage 312 to monitor the pressure in the lower oil passage 312 (that is, the parking brake and the release of the parking brake). The pressure during operation), and feedback to the vehicle control mechanism and the driver in the cab; the upper oil circuit 303 in the housing 301 of the relay valve 300 is provided with a pressure switch 305 that can detect the pressure, the pressure switch 305 and the motor 309 Electrically connected, the pressure switch 305 will feed back the monitored pressure in the upper oil passage 303 to the vehicle control mechanism in real time. When the pressure in the first passage 406 of the bracket 400 or the pressure in the upper oil passage 303 exceeds the set pressure value, it enters In the anti-lock state, the pressure switch 305 turns on the motor 309, and the motor 309 drives the drain valve 310 to work.

[0066] Further, such as Picture 9 The cross-sectional structure diagram of the second embodiment of the first piston and the second piston is shown. Preferably, the elastic body 505 is an air cavity surrounded by the second piston 506 and the second cavity 504, and the air cavity is filled with A gas spring that presses the gas to a set value to act on the first piston 501 or the second piston 506 through the elastic force of the gas spring, or, as Figure 8 As shown in the cross-sectional structure diagram of the first embodiment of the first piston and the second piston, the elastic body 505 is a spring to act on the first piston 501 or the second piston 506 through the elastic force of the spring, wherein the spring may be metal Springs or rubber springs or other forms of springs.

[0067] In one embodiment, such as Figure 8 As shown, the first piston 501 is a single-walled cup-shaped cylinder. The bottom of the first piston 501 is provided with a circular hole and a sealing device for the core tube 502 to pass through. The first piston 501 is close to one end of the brake pad 800 (ie, the first A second cavity 504 is recessed on the top of a piston 501. The second cavity 504 is roughly cylindrical to accommodate the second piston 506. The end of the first piston 501 close to the brake pad 800 is sleeved with a fixing nut 503 to hold it Fixed on the bracket 400, the first piston 501 is in sealed contact with the inner wall surface of the first cavity 415 through a seal, so that a first cavity is formed between the first piston 501 and the bottom surface of the first cavity 415. An elastic body 505 is provided between the bottom surface of the second cavity 504 and the second piston 506 to provide force for the first piston 501 and the second piston 506. The opening of the first piston 501 and the outer wall of the second piston 506 are fixed An end cover 509 is provided, and the second piston 506 can seal and move through the end cover 509. The end cover 509, the outer wall surface of the second piston 506 and the inner wall surface of the second cavity 504 form a second cavity 508, and the second piston 506 An inner cavity is provided inside, and one end of the core tube 502 extends into the inner cavity of the second piston 506 and communicates with the second cavity 508 through an oil hole 507 or a passage 511 provided in the second piston 506.

[0068] In another embodiment, such as Picture 9 As shown, the first piston 501 is a double-walled cylinder, which includes an inner wall and an outer wall. The bottom wall of the inner wall of the first piston 501 is provided with a through hole and a sealing device for the core tube 502 to pass through; the inner wall of the first piston 501 and An inflator is provided on the bottom wall between the outer walls, and the inflator communicates with the air cavity so as to fill the air cavity with compressible gas. The inflator can be a valve core 510; the bottom wall of the first piston 501 is on the second A pipe string is protruding from the cavity 504. The pipe string forms the inner wall of the first piston 501. The through hole in the pipe string is used to penetrate the core tube 502. A second cavity 504 is formed between the inner wall and the outer wall of the first piston 501. The piston 506 is inserted in the second cavity 504, an end cover 509 is fixed between the opening of the first piston 501 and the outer wall of the second piston 506, and the second piston 506 can seal and move through the end cover 509, the end cover 509 A second cavity 508 is formed between the outer wall surface of the second piston 506 and the inner wall surface of the second cavity 504, which passes through the core tube 502 of the first piston 501 and extends into the second piston 506, and passes through the The oil hole 507 or the passage 511 communicates with the second cavity 508 of the second piston 506. In addition, the bottom wall of the first piston 501 is provided with a plurality of recesses at equal intervals in the circumferential direction, and the recesses communicate with the air cavity to ensure the first When the second piston 506 moves toward the bottom wall of the first piston 501, the gas can have a safe containment space.

[0069] Further, such as Picture 9 As shown, the second piston 506 has a thick round cup shape, and the cup body of the second piston 506 is provided with a passage 511. The passage 511 is generally Z-shaped so that the second cavity 508 can communicate with the core tube 502 through the passage 511. The side walls of the second piston 506 are respectively provided with a gas sealing part 512 and a liquid sealing part 513 that are in sealing contact with the first piston 501. Both ends of the gas sealing part 512 are in sealing contact with the inner wall and the outer wall of the first piston 501 to ensure the gas The cavity is sealed to avoid gas leakage from the gas cavity. The liquid sealing portion 513 and the gas sealing portion 512 are spaced apart, and the two ends of the liquid sealing portion 513 are in sealing contact with the inner wall and outer wall of the first piston 501 respectively to ensure the second cavity 508 The tightness to avoid liquid leakage.

[0070] Further, such as Figure 18 As shown, the pump 315 includes a pump body, a pump driving device, and a third piston 318; the upper part of the pump body is provided with a liquid inlet and a third piston cavity 320. The liquid inlet and the third piston cavity 320 communicate with each other. The port is connected to the circuit of the liquid container 103 through the third pipeline 203, the lower part of the pump body is provided with a liquid outlet, and the liquid outlet of the pump body communicates with the second cavity 508 through the second channel 412; the pump driving device side (also That is, the fulcrum of the fixed end 316) is set on the pump body, the third piston 318 on the other side of the pump driving device (that is, the movable end 317) is installed in the third piston cavity 320, and the third piston 318 is connected to the pump driving device. Specifically, the pump body of the pump 315 that releases the brake system is fixed on the housing 301 of the relay valve 300, one end of the pump 315 is the fixed end 316, which serves as a fulcrum during operation, and the other end of the pump 315 is the movable end 317, the third piston 318 connected to the movable end 317 is driven to reciprocate up and down in the third piston cavity 320. The cylinder between the fixed end 316 and the movable end 317 of the pump 315 is a pump driving device for manual driving The pump works, the liquid inlet of the pump body is connected to the middle oil passage 307, and the liquid outlet is connected to the lower oil passage 312, so that the middle oil passage 307, the middle port 306 and the third pipeline 203 of the relay valve 300 are connected to the liquid container 103 is connected, and communicates with the second cavity 508 through the lower oil passage 312, the lower branch interface 313 and the second channel 412 of the bracket 400, and the unlocking oil is formed between the liquid inlet and the liquid outlet of the pump body Road 319, the unlocking oil passage 319 is provided with a one-way valve 321, so that liquid can only be supplied from the liquid container 103 to the second cavity 508 through the unlocking oil passage 319, compressing the elastic body 505, and causing the second piston 506 to drive the brake pad 800 Move away from the brake disc 900 to release the parking brake.

[0071] Further, such as Picture 20 As shown, the unloading valve 322 includes an unloading valve body, an unloading valve spool 324, and an unloading valve driving device 323. The unloading valve body is provided with a liquid inlet, a liquid outlet and a spool cavity. The unloading valve The liquid inlet of the valve body communicates with the second cavity 508 through the second channel 412 and the core tube 502, the liquid outlet of the unloading valve body communicates with the liquid container 103 through the third pipeline 203, and the unloading valve spool cavity is set Between the inlet and outlet of the unloading valve body, the unloading valve spool 324 is arranged in the unloading valve spool cavity, and the unloading valve driving device 323 is connected to the unloading valve spool 324. Specifically, The unloading valve 322 for releasing the brake system is arranged in the housing 301 of the relay valve 300. The unloading valve drive device 323 is provided at one end of the unloading valve body located outside the housing 301. The unloading valve drive device 323 is a Hexagon socket bolts. One end of the unloading valve body located in the housing 301 is the spool cavity to accommodate the unloading valve spool 324. The unloading valve body extends upward and downward from the spool cavity to form a liquid inlet. And the liquid outlet, the liquid inlet and the liquid outlet are both connected to the lower oil passage 312 of the relay valve 300 to communicate with the second cavity 508 via the lower branch interface 313, the second channel 412, and the core tube 502, and The lower interface 311 and the third pipeline 203 communicate with the liquid container 103 to return the liquid in the second cavity 508 to the liquid container 103, release the elastic body 505, and make the second piston 506 drive the brake pad under the action of the elastic body 505 800 touches the brake disc 900 to restore the parking brake.

[0072] Further, such as Figure 16 , Figure 19 with Figure 22 As shown, the drain valve 310 is provided with a drain valve body and a drain valve spool. The drain valve body is provided with a drain valve spool cavity, an inlet and an outlet, and the inlet of the drain valve body The liquid port is communicated with the first cavity through the third channel 409, and the liquid outlet of the valve body of the relief valve communicates with the liquid container 103 through the third pipeline 203; the valve core of the relief valve is installed at the lower part of the valve core cavity of the relief valve, The spool of the drain valve is provided with a liquid inlet. The inlet of the spool of the drain valve can communicate with the inlet of the valve body. The spool of the drain valve is also provided with more than one outlet for the discharge. The outlet of the valve spool and the outlet of the drain valve body are assembled in a misaligned position; the top of the drain valve spool is provided with a shaft hole connected to the motor 309, and the motor 309 is installed on the upper part of the drain valve spool cavity , The motor shaft of the motor 309 is inserted into the shaft hole of the drain valve spool. After the motor 309 is energized, the drain valve spool rotates, and the outlet of the drain valve body and the outlet of the drain valve spool alternately open and close. (That is, it keeps on and off) to realize the continuous increase and decrease of the pressure of the first piston pressing the brake disc to achieve the purpose of anti-lock. The liquid discharged from the outlet of the drain valve 310 passes through the third pipeline 203 is in communication with the liquid container 103. Specifically, the motor 309 of the anti-lock brake system is installed in the relay valve 300, and the drain valve 310 of the anti-lock brake system is installed in the middle oil passage 307 of the relay valve 300 to allow The branch interface 308 communicates with the third channel 409 and the first cavity, and can communicate with the third pipeline 203 through the middle interface 306. The motor 309 drives the drain valve core to operate to realize the connection and closing of the oil circuit. One liquid inlet of the liquid valve 310 can be arranged at the lower end of the valve body of the drain valve, and more than one liquid outlet can be arranged on the peripheral wall of the valve body of the drain valve. Preferably, there are three liquid outlets, or the drain One liquid inlet and more than one liquid outlet of the valve are arranged on the peripheral wall of the valve body of the relief valve at intervals, as long as the alternate communication of the oil passages can be realized.

[0073] Further, such as Figure 3 to Figure 6 As shown, the bracket 400 is divided into a left bracket 401 and a right bracket 402, the left bracket 401 and the right bracket 402 form a receiving cavity 414 for accommodating the brake disc 900, the left bracket 401 and the right bracket 402 are fixedly connected, and the left bracket 401 The first channel 406, the second channel 412, the third channel 409 and the first channel 406, the second channel 412, and the third channel 409 of the right bracket 402 are correspondingly communicated; the left bracket 401 is provided with the mounting part of the bracket 400, The mounting part is fixed on the vehicle axle 102, the first hole 415 on the left bracket 401 and the first hole 415 on the right bracket 402 are arranged oppositely, wherein the left bracket 401 and the right bracket 402 are arranged oppositely and are approximately semicircular. The arc-shaped body, the first holes 415 recessed on the inner side of the left bracket 401 are arranged at equal intervals, and are opposite to the first holes 415 recessed on the inner side of the right bracket 402, and the first channel is provided on the outer side of the left bracket 401 406, the second channel 412, and the third channel 409 are all arc-shaped. The first channel 406 and the third channel 409 are respectively located on both sides of the second channel 412. The two ends of the left bracket 401 and the two ends of the right bracket 402 are respectively It is connected by a connecting column 403. Three concealed tubes 404 are arranged in the connecting column 403. The first channel 406, the second channel 412 and the third channel 409 of the left bracket 401 pass through a concealed tube 404 and the first channel 406 of the right bracket 402, respectively. , The second channel 412 and the third channel 409 are connected. In order to ensure the strength of the bracket 400, the left bracket 401 and the right bracket 402 can also be connected by a plurality of intermediate strengthening columns. The strengthening columns can be provided with connecting bolts 420 to realize the left The bracket 401 and the right bracket 402 are firmly connected.

[0074] Further, such as image 3 with Figure 5 As shown, both ends of the first passage 406 are respectively provided with a service brake joint 405, both ends of the second passage 412 are respectively provided with a parking brake joint 411, and both ends of the third passage 409 are respectively provided with an oil return joint 408 In order to facilitate the installation and connection of the pipeline, the first passage 406 is provided with multiple service brake oil holes 407 to communicate with the first cavity, and the second passage 412 is provided with multiple parking brake oil holes 413 to In communication with the core tube 502, a plurality of oil return holes 410 are provided in the third channel 409 to communicate with the first cavity.

[0075] Further, there are one or more first holes 415, and each first hole 415 is equipped with a first piston 501, a second piston 506 and a core tube 502. Preferably, the left bracket 401 and the right bracket 402 are respectively Six, four or two first holes 415 are provided to make the brake pad 800 evenly stressed.

[0076] Implementation mode two

[0077] Such as Figure 10 to Figure 12 As shown, the present invention also provides a disc hydraulic anti-lock brake. The difference from the first embodiment is that the first cavity 416 provided on the bracket 400 is used to accommodate the first piston 601, and the second The cavity 417 is used to accommodate the second piston 701, and the first cavity 416 and the second cavity 417 are alternately arranged, and the structures of the first piston 601, the second piston 701, etc. are adaptively changed according to these structural changes.

[0078] Specifically, the disc hydraulic anti-lock brake includes: a bracket 400 with a first hole 416, a second hole 417, a core tube 704, a passage, and brake pads arranged at the opening of the first hole 416 and the second hole 417 The seat and the mounting part for installing the bracket to the axle. The passage includes a first passage 406, a second passage 412 and a third passage 409. The second passage 412 is in communication with the core tube 704; the first piston 601 is arranged at In the first cavity 416, the bottom of the first piston 601 and the bottom of the first cavity 416 form a first cavity 602. The first cavity 602 communicates with the service brake valve through the first passage 406 and the first pipeline 201; the second piston 701, arranged in the second cavity 417, the second cavity 417 is provided with an end cover 705, a second cavity 702 is formed between the second piston 701 and the end cover 705, and the second cavity 702 passes through the core tube 704, the second channel 412 and The second pipeline 202 communicates with the parking brake valve; the spring 703 is arranged between the second piston 701 and the bottom of the second cavity 417; the brake disc 900 is provided with a counting ring gear and a mounting part, which is fixed on the car On the output shaft of the bridge 102; the brake release system includes a pump 315 and an unloading valve 322 arranged on the bracket 400 and/or the frame of the motor vehicle. The liquid inlet of the pump 315 is communicated with the liquid container 103 through the third pipeline 203, The liquid outlet of the pump 315 communicates with the second cavity 702 through the second channel 412 and the core tube 704; the liquid inlet of the unloading valve 322 communicates with the second cavity 702 through the second channel 412 and the core tube 704, and the unloading valve 322 The liquid outlet is communicated with the liquid container 103 through the third pipeline 203; the anti-lock brake system includes a counting sensor arranged on the bracket 400 and/or the frame of the motor vehicle, and is arranged on the bracket 400 and/or the frame of the motor vehicle The motor 309 and the drain valve 310, the counting ring set on the brake disc 900, the outlet of the drain valve 310 communicates with the liquid container 103, and the inlet of the drain valve 310 passes through the third channel 409 and the first cavity 602 Connected, when the counting sensor detects that the rotation speed of the counting ring gear reaches the set count value, the motor 309 starts and drives the drain valve 310 to work, realizing the oil circuit of the first cavity 602 and the third pipeline 203 and the liquid container 103 On-off (that is, the alternate on-off between the first cavity 602 and the liquid container 103 is realized), the pressure of the first piston pressing the brake disc 900 is continuously increased and decreased, and the goal of anti-lock is achieved; the brake system and anti-lock are released The dead system can also be combined into a whole, called the relay valve 300. The relay valve 300 is arranged on the bracket 400 and/or the frame of the motor vehicle. The relay valve 300 can be connected to the first passage 406, the second passage 412, The third channel 409 is directly connected, and the relay valve 300 can also be connected to the first channel 406, the second channel 412, and the third channel 409 through pipelines; the brake system with multiple disc hydraulic anti-lock brakes can share one Relay valve 300, each brake of the braking system can also use a relay valve 300 separately.

[0079] Such as Picture 11 As shown, the first piston 601 is accommodated in the first cavity 416 of the bracket 400 and can move axially therein. The first piston 601 is generally cylindrical, and the diameter of the end of the first piston 601 close to the brake pad 800 is smaller than The inner diameter of a hole 416 and the inner wall of the first hole 416 is provided with an end cap 603. The diameter of the end of the first piston 601 away from the brake pad 800 is substantially equal to the inner diameter of the first hole 416 to make sealing contact with the first hole 416. In addition, a first cavity 602 capable of containing liquid is formed between the bottom end of the first piston 601 and the bottom wall of the first cavity 416, and a first spring 604 is accommodated between the large diameter end of the first piston 601 and the end cover to align The first piston 601 exerts a force, such as Picture 12 As shown, the second piston 701 is accommodated in the second cavity 417 of the bracket 400 and can move axially within it. The second piston 701 is generally thick-mouthed cup-shaped, and the cup mouth of the second piston 701 and the second cavity A spring 703 is arranged between the bottom wall of the 417, an end cover 705 is arranged between the bottom of the second piston 701 and the side wall of the second cavity 417, and a second piston 701 is formed between the mouth of the second piston 701 and the end cover 705 to contain liquid. In the second cavity 702, the cup body of the second piston 701 is provided with a passage communicating with the second cavity 702, so as to realize the communication between the second cavity 702 and the second channel 412 through the core tube 704 that penetrates the second piston 701.

[0080] Preferably, the first hole 416 and the second hole 417 alternately arranged on the bracket 400 can be three, two or one respectively. When the bracket 400 is two, the first hole 416 and the second hole 417 on the left bracket 401 The positions and numbers of the holes 417 are consistent with and corresponding to those on the right bracket 402, and are evenly distributed along the arc extending direction of the bracket 400, so that the brake pad 800 is evenly stressed.

[0081] Implementation mode three

[0082] Such as figure 1 , figure 2 with Figure 21 As shown, the present invention also provides a disc hydraulic anti-lock brake system, which is applied to the braking of motor vehicles. Of course, it is not limited to automobiles, and it can also be applied to non-automotive braking, such as high-speed rail brakes. Braking system. The disc hydraulic anti-lock braking system includes a liquid container 103, a liquid pump, a charging valve, an accumulator, a service brake valve, a parking brake valve, an axle 102, and a first pipeline 201 , The second pipeline 202, the third pipeline 203 and the disc hydraulic anti-lock brake; the disc hydraulic anti-lock brake is the disc hydraulic anti-lock brake described in the first embodiment, and its structure and working principle They are all the same, so I won’t repeat them here;

[0083] When the liquid pump is working, the liquid in the liquid container 103 enters the accumulator under the action of the liquid pump and the filling valve and is stored at the set pressure;

[0084] When the driver opens the parking brake valve (ie, hand brake valve), the high-pressure oil in the accumulator passes through the parking brake valve, the second pipeline 202, the second passage 412, the core tube 502, and the second piston The passage 511 on the 506 enters the second cavity 508. When the pressure in the second cavity 508 increases to the set pressure, the elastic body 505 is compressed, and the second piston 506 retracts (that is, the second piston 506 compresses the elastic body toward the bottom of the second cavity 504). Body 505), the brake pads on the brake pad 800 release the brake disc 900, and the parking brake is in a released state, so that the vehicle can start driving or moving; wherein, when the vehicle is in the parking brake state, the first in the bracket 400 The pressure of the second piston 506 on the elastic body 505 drives the brake pad 800 to closely contact the brake disc 900;

[0085] When the driver closes the parking brake valve (ie, the hand brake valve) during an emergency parking or driving process, the pressure liquid in the second chamber 508 passes through the passage 511 and the second piston 506 under the action of the elastic body 505. The core tube 502, the second passage 412, the second pipeline 202, and the parking brake valve return to the liquid container 103, the pressure in the second cavity 508 disappears, and under the action of the elastic body 505, the second piston 506 drives the brake pad 800 Press the brake disc 900, and the vehicle is in the parking brake state;

[0086] When the driver steps on the service brake valve (ie the foot valve), the high-pressure liquid in the accumulator enters the first chamber through the service brake valve, the first pipeline 201, and the first passage 406, and the first piston 501 drives the brake The disc 800 compresses the brake disc 900, during which the first piston 501 compresses the elastic body 505, the brake disc 900 transmits the pressure to the axle 102, and the motor vehicle decelerates or stops; when the driver releases the service brake valve, the first cavity The liquid inside returns to the liquid container 103 through the first channel 406, the first pipeline 201, and the service brake valve. During this period, the first piston 501 releases the elastic body 505, the pressure in the first cavity disappears, and the brake pad 800 acts on the brake disc 900 When the pressure disappears, the service brake is released and normal driving is restored;

[0087] When the driver steps on the service brake valve (ie the foot valve) and the counting sensor detects that the rotation speed of the counting ring reaches the set value, the motor 309 drives the spool of the drain valve 310 to rotate, and the drain valve 310 and the third tube The circuit 203 and the liquid container 103 are continuously connected and disconnected, so that the pressure between the brake pad 800 and the brake disc 900 is continuously increased and decreased, so that the liquid in the first cavity is interrupted to the liquid container 103 through the drain valve 310 When the counting sensor detects that the rotation speed of the counting ring gear is lower than the set value, the motor 309 stops rotating, the discharge valve 310 and the third pipeline 203 and the liquid container 103 is disconnected and the service brake state is restored;

[0088] When the brake fails and affects the driving of the vehicle or needs to release the parking brake for rescue, the driving device of the pump 315 (that is, the cylindrical handle) is driven to pass the liquid in the liquid container 103 and the third pipeline 203 through the pump 315, The second passage 412, the core tube 502, and the passage 511 of the second piston 506 are pressed into the second cavity 508 to increase the pressure in the second cavity 508 to compress the elastic body 505, and the second piston 506 retracts (ie, the second piston 506 compresses the elastic body 505 toward the bottom of the second cavity 504), so that the second piston 506 and the brake pads on the brake pad 800 are released together with the brake disc 900, the parking brake is released, and the movement of the vehicle is realized;

[0089] When the parking brake function needs to be restored after the brake is repaired, the driving device of the unloading valve 322 is driven. The unloading valve 322 is in communication with the third pipeline 203 and the liquid container 103, and the pressure liquid in the second cavity 508 flows out to close the unloading In the passage between the valve 322 and the third pipeline 203 and the liquid container 103, the elastic body 505 is released, and the parking brake function is restored.

[0090] Among them, the two ends of the axle 102 are respectively sleeved with rims for mounting the tire 101, the disc type hydraulic anti-lock brake is located in the rim and fixed on the axle 102, and the two ends of the axle 102 are respectively sleeved with a brake disc 900, each brake disc 900 is located between the two sets of brake pads 800, and the brake disc 900 is in contact with or separated from the brake pads 800 to achieve or release braking. In addition, the first pipeline 201, the second pipeline 202, and the third pipeline 203 are generally arranged in parallel under the frame. They can also be arranged reasonably according to the wiring under the frame, and because the frequency of service braking is relatively high, the first There are two pipelines 201, which are located on both sides of the second pipeline 202 and the third pipeline 203, so that each first pipeline 201 serves multiple disc-type hydraulic anti-lock brakes on one side of the frame to ensure Braking quality.