CN115626146A

CN115626146A - Hydraulic braking supercharging device, braking system and vehicle

Info

Publication number: CN115626146A
Application number: CN202211150804.0A
Authority: CN
Inventors: 马瑞海; 张俊智; 何承坤; 刘伟龙
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-20

Abstract

The invention discloses a hydraulic brake pressurizing device, a brake system and a vehicle. The hydraulic braking supercharging device comprises a shell, a driving module, a supercharging module and a magnetic lead screw, wherein the driving module is used for outputting torque, the supercharging module comprises a cylinder body and a piston, the magnetic lead screw comprises a lead screw rotor and a lead screw rotor, the lead screw rotor is driven by the driving module to rotate, the lead screw rotor and the lead screw rotor generate a magnetic force effect when rotating so as to drive the lead screw rotor to slide, and the lead screw rotor drives the piston to slide in the cylinder body when sliding so as to achieve the effect of adjusting the brake hydraulic pressure in the cylinder body. The screw rotor and the screw rotor are in transmission through magnetic force action, are not in direct contact, have no problems of abrasion and mechanical clamping, and are not easy to break down. In addition, the magnetic screw can also play a role in overload protection. The brake system comprises the hydraulic brake pressurization device. The vehicle of the invention includes the above-described brake system.

Description

Hydraulic braking supercharging device, braking system and vehicle

Technical Field

The invention relates to the technical field of vehicle braking, in particular to a hydraulic brake pressurizing device, a brake system and a vehicle.

Background

With the progress of vehicle intellectualization and unmanned development, people put higher demands on the safety and reliability of vehicle brake systems. At present, a brake system widely applied to an intelligent vehicle is an electronic hydraulic brake system. The core and the basic component of the electronic hydraulic brake system are active pressurization devices, and the active pressurization devices can actively adjust the pressure of a brake master cylinder under the condition that a driver does not intervene so as to realize intelligent driving functions such as auxiliary braking and the like.

In the related art, an electronic hydraulic brake system generally includes a plurality of mechanical transmission components such as a planetary gear, a ball screw, a nut screw, and the like, and the mechanical transmission components are used for transmitting torque of a driving motor to boost or reduce pressure of a brake master cylinder during braking. However, the electronic hydraulic brake system is prone to failure after being used for a period of time, and safety and reliability are not high.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

the electronic hydraulic brake system in the related art generally adopts a mechanical transmission part, and the mechanical transmission part inevitably has the problems of friction, abrasion, material aging and even mechanical clamping and the like when in work. In addition, the electronic hydraulic brake system does not have an overload protection function, and mechanical transmission parts are easily damaged due to overload. The existence of these problems makes the electro-hydraulic brake system susceptible to failure after a period of use.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides a hydraulic braking supercharging device which adopts a magnetic lead screw as a transmission component and is not easy to break down.

The embodiment of the invention also provides a braking system.

The embodiment of the invention also provides a vehicle.

The hydraulic braking pressurization device comprises a shell, a driving module, a pressurization module and a magnetic screw rod, wherein the driving module is arranged on the shell and is suitable for outputting torque; the boosting module comprises a cylinder body, a piston and a liquid storage box, the piston is in sliding fit with the cylinder body, and the liquid storage box is communicated with the interior of the cylinder body and provides brake fluid for the cylinder body;

the magnetic lead screw comprises a lead screw rotor and a lead screw rotor, the lead screw rotor is suitable for being driven by the driving module to rotate, the lead screw rotor is connected with the piston and is in transmission fit with the lead screw rotor, the lead screw rotor is in sliding fit with the shell, the lead screw rotor rotates and generates a magnetic action between the lead screw rotor to drive the lead screw rotor to slide relative to the shell, and the lead screw rotor is suitable for driving the piston to slide in the cylinder body to adjust the pressure of the brake fluid in the cylinder body.

In the hydraulic brake boosting device provided by the embodiment of the invention, the lead screw rotor is connected with the driving module, the driving module is used for outputting torque to drive the lead screw rotor to rotate, the lead screw rotor is in transmission fit with the lead screw rotor, and the lead screw rotor are in transmission through magnetic force action. The screw rotor slides and cooperates with the shell, so that the screw rotor is driven to slide relative to the shell under the action of magnetic force when rotating. The lead screw rotor is connected with a piston of the pressurizing module, and the lead screw rotor can drive the piston to slide in the cylinder body when sliding relative to the shell, and specifically, when the lead screw rotor drives the piston to slide to reduce the inner space of the cylinder body, the brake fluid pressure in the cylinder body is increased; when the lead screw rotor drives the piston to slide so that the inner space of the cylinder body is enlarged, the brake fluid pressure in the cylinder body is reduced.

Because the screw rotor and the screw rotor are driven by magnetic force and are not in direct contact, the problems of abrasion and mechanical clamping do not exist, and the fault is not easy to occur. In addition, when some modules, such as a driving module, in the hydraulic braking pressure boosting device are accidentally broken down to cause the magnetic screw to overload, the magnetic screw cannot be seriously damaged because the screw rotor and the screw rotor are not in direct contact, and the overload protection effect can be achieved.

In some embodiments, the driving module includes a stator, a first rotor and a second rotor, the stator is fixed to the housing, the first rotor is rotatably assembled to the housing and located inside the stator, the second rotor is disposed between the first rotor and the stator, when the driving module operates, the rotation speed of the first rotor is higher than that of the second rotor, the torque of the second rotor is greater than that of the first rotor, and the lead screw rotor is connected with the second rotor.

In some embodiments, the stator includes a first permanent magnet array disposed on an inner side of the stator, the first rotor includes a second permanent magnet array disposed on an outer side of the first rotor, and the second rotor includes a magnetic modulating ring disposed between the first permanent magnet array and the second permanent magnet array.

In some embodiments, the hydraulic brake boosting device includes a self-locking module connected to the first rotor and adapted to indirectly lock the second rotor by locking the first rotor.

In some embodiments, the lead screw rotor includes a cavity, at least a portion of the lead screw rotor is coupled to the cavity, and the lead screw rotor is rotatable within the cavity.

In some embodiments, the outer peripheral surface of the screw rotor is provided with a first thread, the inner wall of the screw rotor cavity is provided with a second thread and spiral permanent magnets, the spiral permanent magnets are located in the interval of the second thread, the spiral permanent magnets are magnetized in the radial direction, and the same sides of the spiral permanent magnets are alternately arranged in the form of N pole-thread-S pole-thread.

In some embodiments, the outer circumferential surface of the screw rotor is provided with a first spiral permanent magnet, the inner wall of the screw rotor cavity is provided with a second spiral permanent magnet, and the second spiral permanent magnet surrounds the outer circumference of the first spiral permanent magnet; the first spiral permanent magnet and the second spiral permanent magnet are magnetized in the radial direction, and are alternately arranged in an N-stage-S-stage mode on the same side face.

In some embodiments, the piston includes a first piston and a second piston, the first piston is connected to the screw mover and located between the screw mover and the second piston, a first cavity is formed between the first piston and the second piston, a second cavity is formed between the second piston and the cylinder, and the first piston and the second piston are linked to adjust the pressure of the brake fluid in the first cavity and the second cavity when the screw mover slides.

In some embodiments, the cylinder includes a first inlet, a second inlet, a first outlet and a second outlet, the first inlet and the first outlet are communicated with the first cavity, the second inlet and the second outlet are communicated with the second cavity, and the liquid storage box provides the brake fluid to the first cavity and the second cavity through the first inlet and the second inlet, respectively.

The brake system of the embodiment of the invention comprises the hydraulic brake pressurization device of any one embodiment.

The vehicle of the embodiment of the invention comprises the braking system of any one embodiment.

Drawings

Fig. 1 is a schematic structural view of a hydraulic brake pressure increasing apparatus according to an embodiment of the present invention.

Fig. 2 is a sectional view of a drive module of an embodiment of the invention.

Fig. 3 is a schematic mechanism diagram of a magnetic screw according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a magnetic screw according to another embodiment of the present invention.

Reference numerals:

1. a housing;

200. a drive module; 21. a stator; 211. a stator core; 212. an armature winding; 213. a first permanent magnet array; 22. a first rotor; 221. a first rotor core; 222. a second permanent magnet array; 23. a second rotor; 231. a second rotor core; 232. adjusting a magnetic ring; 24. a first bearing; 25. a second bearing; 26. a third bearing;

300. a boost module; 31. a cylinder body; 311. a first liquid inlet; 312. a second liquid inlet; 313. a first liquid outlet; 314. a second liquid outlet; 32. a first piston; 33. a second piston; 34. a first chamber; 35. a second chamber; 36. a liquid storage box;

4. a magnetic lead screw; 41. a lead screw rotor; 411. a lead screw rotor core; 412. a first thread; 413. a first helical permanent magnet; 42. a lead screw mover; 421. a second thread; 422. a helical permanent magnet; 423. a second helical permanent magnet; 43. a linear bearing; 44. a coupling;

5. and a self-locking module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1, the hydraulic brake boosting device according to the embodiment of the present invention includes a housing 1, a driving module 200, a boosting module 300, and a magnetic screw 4.

The driving module 200 is provided to the housing 1 and adapted to output a torque. The drive module 200 may comprise a motor, the drive shaft of which is used to output torque.

The pressurizing module 300 includes a cylinder 31, a piston slidably fitted in the cylinder 31, and a reservoir 36 communicating with the inside of the cylinder 31 and supplying a brake fluid into the cylinder 31.

As shown in fig. 1, the cylinder 31 may have a column shape with one end closed, a piston chamber is formed between the piston and the cylinder 31, and the reservoir 36 may communicate with the piston chamber and supply brake fluid into the piston chamber. When the piston moves towards the closed end of the cylinder 31, the space of the piston cavity is reduced, the brake fluid pressure in the piston cavity is increased, and the brake fluid can flow from the piston cavity to the brake to perform braking; when the piston moves away from the closed end of the cylinder 31, the space of the piston cavity is increased, the pressure of the brake fluid in the piston cavity is reduced, the brake fluid can flow back into the piston cavity, and the braking of the brake is weakened or stopped.

The magnetic lead screw 4 comprises a lead screw rotor 41 and a lead screw rotor 42, the lead screw rotor 41 is suitable for rotating under the driving of the driving module 200, the lead screw rotor 42 is connected with the piston and is in transmission fit with the lead screw rotor 41, and the lever rotor is in sliding fit with the shell 1.

As shown in fig. 1, the screw rotor 41 may have a cylindrical shape, the screw mover 42 may have a cylindrical shape with one end open and the other end closed, the screw rotor 41 is assembled in the cylindrical cavity of the screw mover 42, and the screw rotor 41 and the screw mover 42 do not contact each other. The screw mover 42 may be slidably assembled with the housing 1 through a linear bearing 43.

The screw rotor 41 generates a magnetic force action with the screw mover 42 when rotating to drive the screw mover 42 to slide relative to the housing 1, and the screw mover 42 is adapted to drive the piston to slide in the cylinder 31 when sliding to adjust the pressure of the brake fluid in the cylinder 31.

As shown in fig. 1, the outer circumference of the screw rotor 41 may be provided with a magnet, and the inner wall of the screw mover 42 may be provided with a magnet or a coil, respectively, to generate a magnetic action therebetween. When the screw rotor 41 rotates, the screw rotor 42 is driven to slide, so that the effect of adjusting the brake fluid pressure in the cylinder 31 is achieved.

In the hydraulic brake boosting device provided by the embodiment of the invention, the lead screw rotor is connected with the driving module, the driving module is used for outputting torque to drive the lead screw rotor to rotate, the lead screw rotor is in transmission fit with the lead screw rotor, and the lead screw rotor are in transmission through magnetic force action. The screw rotor slides and is matched with the shell, so that the screw rotor is driven to slide relative to the shell through the magnetic action when rotating. The screw rod rotor is connected with a piston of the pressurizing module, and the screw rod rotor can drive the piston to slide in the cylinder body when sliding relative to the shell.

Because the screw rotor and the screw rotor are driven by magnetic force and are not in direct contact, the problems of abrasion and mechanical clamping do not exist, and the fault is not easy to occur. In addition, when some modules, such as a driving module, in the hydraulic brake boosting device accidentally break down to cause overload of the magnetic screw, the magnetic screw cannot be seriously damaged because the screw rotor and the screw rotor are not in direct contact, and the overload protection effect can be achieved.

In some embodiments, the driving module 200 includes a stator 21, a first rotor 22 and a second rotor 23, the stator 21 is fixed to the housing 1, the first rotor 22 is rotatably mounted to the housing 1 and located inside the stator 21, the second rotor 23 is disposed between the first rotor 22 and the stator 21, when the driving module 200 operates, the rotation speed of the first rotor 22 is higher than that of the second rotor 23, the torque of the second rotor 23 is greater than that of the first rotor 22, and the lead screw rotor 41 is connected to the second rotor 23.

As shown in fig. 1 and 2, the stator 21 is fixed to an inner wall of the housing 1, the stator 21 may include a stator core 211 and an armature winding 212, the first rotor 22 may be disposed inside the stator 21 and rotatably assembled with the housing 1 by a first bearing 24, the second rotor 23 may be disposed between the first rotor 22 and the stator 21 and rotatably assembled with the housing 1 by a second bearing 25, and the first rotor 22 and the second rotor 23 may be assembled by a third bearing 26. The screw rotor 41 and the second rotor 23 can be connected by a coupling 44 and rotate synchronously with the second rotor 23. The torque on the second rotor 23 is larger than the torque on the first rotor 22, so that the driving effect on the screw rotor 41 is better, and the pressurizing module 300 can have a better pressurizing effect.

In some embodiments, the stator 21 includes a first permanent magnet array 213, the first permanent magnet array 213 is disposed on an inner side of the stator 21, the first rotor 22 includes a second permanent magnet array 222, the first permanent magnet array 213 is disposed on an outer side of the first rotor 22, the second rotor 23 includes a magnetic modulating ring 232, and the magnetic modulating ring 232 is disposed between the first permanent magnet array 213 and the second permanent magnet array 222.

As shown in fig. 1 and 2, the first permanent magnet array 213 is located inside the stator 21, the first rotor 22 may include a first rotor core 221 and a second permanent magnet array 222, and the second permanent magnet array 222 is located outside the first rotor 22, and the second rotor 23 may include a second rotor core 231 and a magnetic flux adjusting ring 232, and the magnetic flux adjusting ring 232 is located between the first permanent magnet array 213 and the second permanent magnet array 222. When the driving module 200 operates, the stator 21 and the first rotor 22 form a conventional motor, and torque is generated on the first rotor 22; the partial stator 21, the first rotor 22 and the second rotor 23 form a magnetic gear reducer, the torque on the first rotor 22 is amplified in a fixed proportion, and the amplified torque is output through the second rotor 23 and used for driving the screw rotor 41, so that the pressurizing module 300 has a good pressurizing effect.

The first permanent magnet array 213 and the second permanent magnet array 222 may both adopt a radial magnetizing manner, and are arranged in an N-stage-S-stage alternating manner on the circumferential surface of the same side. The pole pair number of the first permanent magnet array 213, the magnetic adjustment ring 232 and the second permanent magnet array 222 satisfies the following condition: the number of pole pairs of the first permanent magnet array 213 plus the number of pole pairs of the second permanent magnet array 222 is equal to the number of pole pairs of the magnetic tuning ring 232.

In some embodiments, the hydraulic brake boosting device comprises a self-locking module 5, the self-locking module 5 is connected with the first rotor 22, and the self-locking module 5 is adapted to indirectly lock the second rotor 23 by locking the first rotor 22.

As shown in fig. 1, the self-locking module 5 is connected to the first rotor 22 and serves to lock the first rotor 22. In particular, the self-locking module 5 may comprise an electric-loss brake, the first rotor 22 being free to rotate when the electric-loss brake is energized, the first rotor 22 being locked when the electric-loss brake is de-energized. Locking is facilitated due to the smaller torque on the first rotor 22, and the second rotor 23 can be indirectly locked by locking the first rotor 22. After the second rotor 23 is locked, the position of the screw rotor 42 is fixed, the position of the piston in the cylinder 31 is fixed, and the pressure of the brake fluid in the cylinder 31 is kept constant, so that the self-locking effect of the hydraulic brake booster device is achieved. The self-locking module 5 may be suitable for long braking scenarios, such as parking.

In some embodiments, the lead screw rotor 42 includes a cavity, at least a portion of the lead screw rotor 41 fits within the cavity, and the lead screw rotor 41 is rotatable within the cavity.

As shown in fig. 1, the screw mover 42 may have a cylindrical shape, an outer circumference of the screw mover 42 may be assembled with the housing 1 through a linear bearing 43, the screw mover 42 may include a chamber having one end opened, and the screw rotor 41 may be rotatably fitted in the chamber of the screw mover 42.

In other embodiments, the lead screw rotor 41 includes a cavity, and the lead screw mover 42 is fitted within the cavity of the lead screw rotor 41.

In some embodiments, the outer circumferential surface of the screw rotor 41 is provided with a first thread 412, the inner wall of the chamber of the screw rotor 42 is provided with a second thread 421 and a spiral permanent magnet 422, the spiral permanent magnet 422 is located in the interval of the second thread 421, and the spiral permanent magnet 422 is magnetized in the radial direction and is alternately arranged in the form of "N pole-thread-S pole-thread" on the same side.

As shown in fig. 3, the lead screw rotor 41 may adopt a reluctance structure, and includes a lead screw rotor core 411 and a first thread 412, and the first thread 412 is disposed on the outer periphery of the lead screw rotor core 411. The screw rotor 42 may have a permanent magnet structure, and specifically, the inner wall of the chamber of the screw rotor 42 is provided with second threads 421 and spiral permanent magnets 422, the spiral permanent magnets 422 are located at intervals of the second threads 421, and the spiral permanent magnets 422 may be magnetized in a radial direction and alternately arranged in a manner of N-level-second threads 421-S-level-second threads 421 on the same side.

In some embodiments, the outer circumferential surface of the screw rotor 41 is provided with a first spiral permanent magnet 413, the inner wall of the chamber of the screw mover 42 is provided with a second spiral permanent magnet 423, and the second spiral permanent magnet 423 is wound around the outer circumference of the first spiral permanent magnet 413; the first spiral permanent magnet 413 and the second spiral permanent magnet 423 are magnetized in the radial direction, and are alternately arranged in an N-S level on the same side surface.

As shown in fig. 4, the screw rotor 41 may have a permanent magnet structure, and the screw rotor 41 may include a screw rotor core 411 and a first spiral permanent magnet 413, and the first spiral permanent magnet 413 is disposed on an outer circumferential surface of the screw rotor core 411. The inner wall of the chamber of the screw mover 42 is provided with a second spiral permanent magnet 423, and the second spiral permanent magnet 423 is wound around the outer circumference of the first spiral permanent magnet 413. The first spiral permanent magnet 413 and the second spiral permanent magnet 423 can be magnetized in the radial direction, and the same side is alternately arranged in an N-S stage mode.

In other embodiments, the first and second spiral

permanent magnets

413, 423 may be magnetized by a Halbach permanent magnet array structure.

In some embodiments, the pistons include a first piston 32 and a second piston 33, the first piston 32 is connected to the screw mover 42, the first piston 32 is located between the screw mover 42 and the second piston 33, a first chamber 34 is formed between the first piston 32 and the second piston 33, a second chamber 35 is formed between the second piston 33 and the cylinder 31, and the first piston 32 is linked with the second piston 33 to adjust the pressure of the brake fluid in the first chamber 34 and the second chamber 35 when the screw mover 42 slides.

As shown in fig. 1, the first piston 32 and the second piston 33 are both disposed in the cylinder 31, the first piston 32 and the second piston 33 can be linked, and the first piston 32 is connected to the screw mover. When the screw mover slides toward the closed end of the cylinder 31, the first piston 32 and the second piston 33 respectively compress the brake fluid in the first chamber 34 and the second chamber 35 to increase the pressure of the brake fluid in the cylinder 31; when the screw mover 42 slides away from the closed end of the cylinder 31, the pressure of the brake fluid in the cylinder 31 decreases. In the above arrangement, the first chamber 34 and the second chamber 35 are relatively independent and can be used for controlling two sets of brakes respectively, and when one of the chambers fails, the brake controlled by the other chamber is still effective, so that the safety is better.

In some embodiments, the cylinder 31 includes a first inlet 311, a second inlet 312, a first outlet 313 and a second outlet 314, the first inlet 311 and the first outlet 313 are communicated with the first cavity 34, the second inlet 312 and the second outlet 314 are communicated with the second cavity 35, and the reservoir box 36 provides brake fluid to the first cavity 34 and the second cavity 35 through the first inlet 311 and the second inlet 312, respectively.

As shown in fig. 1, the cylinder 31 is provided with a first inlet 311, a second inlet 312, a first outlet 313 and a second outlet 314, and the reservoir 36 provides brake fluid to the first cavity 34 and the second cavity 35 through the first inlet 311 and the second inlet 312, respectively. The first outlet port 313 and the second outlet port 314 may be connected to a stopper.

A brake system of an embodiment of the invention is described below.

The brake system of the embodiment of the invention comprises a hydraulic brake pressurization device, and the hydraulic brake pressurization device has the same structure as the hydraulic brake pressurization device in any embodiment.

A vehicle of an embodiment of the invention is described below.

The vehicle of the embodiment of the invention includes a brake system, and the brake system is the same as the brake system described in the above embodiment.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A hydraulic brake booster device, comprising:

a housing;

the driving module is arranged on the shell and is suitable for outputting torque;

the boosting module comprises a cylinder body, a piston and a liquid storage box, the piston is in sliding fit with the cylinder body, and the liquid storage box is communicated with the interior of the cylinder body and provides brake fluid for the cylinder body;

magnetic force lead screw, magnetic force lead screw includes lead screw rotor and lead screw active cell, lead screw rotor is suitable for rotate under drive module's drive, lead screw active cell with the piston is connected and with lead screw rotor transmission cooperation, just lead screw active cell with the casing cooperation of sliding, lead screw rotor when rotating with produce magnetic force effect between the lead screw active cell, in order to drive lead screw active cell for the casing slides, lead screw active cell is suitable for to drive when sliding the piston slides in order to adjust in the cylinder body the pressure of brake fluid.

2. The hydraulic brake pressure boosting device according to claim 1, wherein the driving module includes a stator fixed to the housing, a first rotor rotatably mounted to the housing and located inside the stator, and a second rotor disposed between the first rotor and the stator, wherein when the driving module is operated, the first rotor rotates at a higher speed than the second rotor, the second rotor rotates at a higher torque than the first rotor, and the lead screw rotor is connected to the second rotor.

3. The hydraulic brake pressure intensifying apparatus of claim 2, wherein said stator includes a first permanent magnet array disposed inside said stator, said first rotor includes a second permanent magnet array disposed outside said first rotor, said second rotor includes a magnetic tuning ring disposed between said first permanent magnet array and said second permanent magnet array.

4. The hydraulic brake boosting apparatus of claim 2, comprising a self-locking module coupled to the first rotor and adapted to indirectly lock the second rotor by locking the first rotor.

5. The hydraulic brake pressure boosting device of claim 1, wherein the lead screw rotor includes a chamber, at least a portion of the lead screw rotor is engaged with the chamber, and the lead screw rotor is rotatable within the chamber.

6. The hydraulic brake pressure boosting device according to claim 5, wherein the outer peripheral surface of the screw rotor is provided with a first thread, the inner wall of the screw rotor chamber is provided with a second thread and spiral permanent magnets, the spiral permanent magnets are positioned in the interval of the second thread, the spiral permanent magnets are magnetized in the radial direction, and the same sides of the spiral permanent magnets are alternately arranged in the form of "N pole-thread-S pole-thread".

7. The hydraulic brake pressure boosting device according to claim 5, wherein the outer circumferential surface of the screw rotor is provided with a first spiral permanent magnet, the inner wall of the screw mover chamber is provided with a second spiral permanent magnet, and the second spiral permanent magnet surrounds the outer circumference of the first spiral permanent magnet; the first spiral permanent magnet and the second spiral permanent magnet are magnetized in the radial direction, and are alternately arranged in an N-stage-S-stage mode on the same side face.

8. The hydraulic brake pressure boosting device according to claim 1, wherein the piston includes a first piston and a second piston, the first piston is connected to the screw mover, and the first piston is located between the screw mover and the second piston, a first chamber is formed between the first piston and the second piston, a second chamber is formed between the second piston and the cylinder, and the first piston and the second piston are linked to adjust the pressure of the brake fluid in the first chamber and the second chamber when the screw mover slides.

9. The hydraulic brake pressure boosting device according to claim 8, wherein the cylinder body includes a first inlet port, a second inlet port, a first outlet port, and a second outlet port, the first inlet port and the first outlet port are communicated with the first chamber, the second inlet port and the second outlet port are communicated with the second chamber, and the reservoir tank supplies the brake fluid to the first chamber and the second chamber through the first inlet port and the second inlet port, respectively.

10. A braking system, characterized in that it comprises a hydraulic brake pressure boosting device according to any one of claims 1-9.

11. A vehicle characterized in that it comprises a braking system as claimed in claim 10.