CN216034307U - Hydraulic brake system and vehicle - Google Patents

Abstract

The application discloses hydraulic braking system belongs to the vehicle field. The hydraulic braking system comprises a brake disc, a braking structure, a hydraulic device and an auxiliary relieving device, wherein the brake disc is matched with the braking structure, the braking structure is connected with the hydraulic device through a first pipeline, and the braking structure is connected with the auxiliary relieving device through a second pipeline; the brake structure has a first state for relieving the brake disc and a second state for braking the brake disc, and the hydraulic device drives the brake structure to switch between the first state and the second state through hydraulic pressure; the auxiliary release device is operable to provide hydraulic pressure to the brake structure when the hydraulic device is disabled, and the auxiliary brake structure is switchable between the first state and the second state.

Description

Hydraulic brake system and vehicle

Technical Field

The application belongs to the field of vehicles, and particularly relates to a hydraulic braking system.

Background

The brake system is a key system for ensuring safe running and reliable stopping of the vehicle as a core component in the field of modern vehicles.

In the prior art, a hydraulic system is adopted to realize braking modes such as service braking, parking braking and manual relieving, and the running vehicle can be effectively braked.

However, when the hydraulic system fails, manual relief needs to be performed by using manpower, which easily causes untimely handling of problems and causes long-term shutdown.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims to provide a hydraulic braking system, which can solve the problem that manual release is needed when a hydraulic braking system in the prior art breaks down, so that the aim of remotely releasing the hydraulic braking system without manual operation is fulfilled when the hydraulic braking system breaks down.

In order to solve the technical problem, the present application is implemented as follows:

the embodiment of the application provides a hydraulic brake system, which is used for improving the problem that manual release is needed when the hydraulic brake system breaks down, and comprises a brake disc, a brake structure, a hydraulic device and an auxiliary release device, wherein the brake disc is matched with the brake structure;

the brake structure has a first state for relieving the brake disc and a second state for braking the brake disc, and the hydraulic device drives the brake structure to switch between the first state and the second state through hydraulic pressure;

when the hydraulic device fails, the auxiliary relieving device is used for providing the hydraulic pressure to the braking structure and assisting the braking structure to switch between the first state and the second state.

In this application embodiment, above-mentioned hydraulic means has realized alleviating or braking the vehicle through alleviating or braking the brake disc, and when hydraulic means became invalid, hydraulic braking system can be timely alleviate or brake the brake disc and realize alleviating or braking the vehicle through supplementary device of alleviating, and this application embodiment has when hydraulic means breaks down, uses supplementary device of alleviating to carry out long-range alleviating, does not need manually operation's beneficial effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic illustration of a brake system in an embodiment of the present application;

FIG. 2 is a schematic illustration of a braking system in an embodiment of the present application;

FIG. 3 is a schematic illustration of a common brake-release condition of the hydraulic device in an embodiment of the present application;

FIG. 4 is a schematic illustration of a service brake-braking state of the hydraulic device in an embodiment of the present application;

FIG. 5 is a schematic illustration of the hydraulic device holding brake in an embodiment of the present application;

FIG. 6 is a schematic illustration of a safety braking mode of the hydraulic device in an embodiment of the present application;

FIG. 7 is a schematic diagram of an inactivated state of an auxiliary mitigation device in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a braking system with a normally open proportional valve and a normally closed proportional valve replaced by a proportional pressure reducing valve in an embodiment of the application;

FIG. 9 is a schematic illustration of a common brake-release state of a hydraulic device having a normally open proportional valve and a normally closed proportional valve replaced with a proportional pressure reducing valve in an embodiment of the present application;

FIG. 10 is a schematic illustration of a service brake-braking state of a hydraulic device having a normally open proportional valve and a normally closed proportional valve replaced with a proportional pressure reducing valve in an embodiment of the present application;

FIG. 11 is a schematic illustration of a safe braking mode in an embodiment of the present application;

FIG. 12 is a schematic view of another safe braking mode in the embodiment of the present application;

FIG. 13 is a schematic illustration of a safe braking mode in which the normally open proportional valve and the normally closed proportional valve are replaced with a proportional pressure reducing valve in an embodiment of the present application;

fig. 14 is a schematic view of another safety braking mode in which a normally open proportional valve and a normally closed proportional valve are replaced with a proportional pressure reducing valve in the embodiment of the present application.

Description of the reference numerals

10. A brake disc; 20. a braking structure; 21. a hydraulic cylinder; 211. an accommodating chamber; 2111. a hydraulic chamber; 2112. a pre-tightening cavity; 22. a piston rod; 23. braking the clamp; 24. dividing the structure; 25. an elastic member; 30. a hydraulic device; 31. an oil tank; 32. a first motor; 33. a first gear pump; 34. a pressure sensor; 35. an accumulator; 36. a first check valve; 37. a normally open proportional valve; 38. a normally closed proportional valve; 39. a first breather valve; 310. a safety brake valve; 311. a pressure limiting valve; 312. a manual pressure relief valve; 313. a first overflow valve; 314. a first filter; 315. a first pressure switch; 316. a first oil fill port; 317. a first joint; 318. a proportional pressure reducing valve; 40. an auxiliary mitigation device; 41. an electromagnetic directional valve; 42. a second pressure switch; 43. a second gear pump; 44. a second motor; 45. a second filter; 46. a second one-way valve; 47. a second overflow valve; 48. a second breather valve; 49. a second oil fill port; 410. a second joint; 50. a first pipeline; 60. a second pipeline; 70. a brake control unit; 80. an auxiliary mitigation switch.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or at least one. In the specification and claims, "and/or" indicates at least one of connected objects, and a character "/" generally indicates that a pre-and post-related object is in an "or" relationship.

The hydraulic brake system provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Referring to fig. 1 through 14, embodiments of the present application provide a hydraulic brake system,

the brake structure comprises a brake disc 10, a brake structure 20, a hydraulic device 30 and an auxiliary relieving device 40, wherein the brake disc 10 is matched with the brake structure 20, the brake structure 20 is connected with the hydraulic device 30 through a first pipeline 50, and the brake structure 20 is connected with the auxiliary relieving device 40 through a second pipeline 60;

the brake structure 20 has a first state for relieving the brake disc 10 and a second state for braking the brake disc 10, and the hydraulic device 30 drives the brake structure 20 to switch between the first state and the second state through hydraulic pressure;

the auxiliary release device 40 is configured to provide the hydraulic pressure to the brake structure 20 to assist the brake structure 20 in switching between the first state and the second state when the hydraulic device 30 fails.

It should be noted that, the brake disc 10 and the braking structure 20 are adapted to each other, and the braking function is realized by mutual friction, the braking structure 20 has a first state of releasing the brake disc 10 and a second state of braking the brake disc 10, in practical application, the hydraulic device 30 can drive the braking structure 20 to switch between the first state and the second state by hydraulic pressure, so as to realize braking or releasing of the braking structure 20 to the vehicle.

The brake structure 20 is connected with the hydraulic brake device and the auxiliary relieving device 40 through a first pipeline 50 and a second pipeline 60 respectively, and when the hydraulic pressure in the first pipeline 50 is increased, the brake structure 20 relieves the brake disc 10; when the hydraulic pressure in the first pipe 50 is weakened, the brake structure 20 brakes the brake disc 10.

When the hydraulic device 30 fails and cannot drive the brake structure 20 to switch between the first state and the second state through hydraulic pressure, the auxiliary relieving device 40 provides hydraulic pressure to the brake structure 20 through the second pipeline 60, and is used for assisting the brake structure 20 to switch between the first state and the second state when the hydraulic device 30 is aged, so that braking or relieving of the vehicle is achieved.

Specifically, the hydraulic device 30 realizes the alleviation or braking of the vehicle by alleviating or braking the brake disc 10, when the hydraulic device 30 fails, the hydraulic braking system can alleviate or brake the brake disc 10 to realize the alleviation or braking of the vehicle by the auxiliary alleviating device 40 in time, and the embodiment of the application has the beneficial effects that when the hydraulic device 30 fails, the auxiliary alleviating device 40 is used for remotely alleviating, and manual operation is not needed.

Optionally, in the embodiment of the present application, when the braking structure 20 is switched from the first state to the second state, the braking structure 20 is close to the brake disc 10, and the braking structure 20 presses the brake disc 10; when the braking structure 20 is switched from the second state to the first state, the braking structure 20 is far away from the brake disc 10, and the braking structure 20 releases the brake disc 10.

When the braking structure 20 is switched from the first state to the second state, the braking structure 20 is close to the brake disc 10, and the braking structure 20 increases the friction force between the braking structure 20 and the brake disc 10 by pressing the brake disc 10, so that the braking of the braking structure 20 on the brake disc 10 is realized;

when the braking structure 20 is switched from the second state to the first state, the braking structure 20 operates on the brake disk 10, and the braking structure 20 reduces the friction force with the brake disk 10 by loosening the brake disk 10, so that the brake disk 10 is relieved by the braking structure 20.

The embodiment of the present application has an advantageous effect that braking or mitigation of the brake disc 10 can be achieved by switching the state of the brake structure 20.

Optionally, in the embodiment of the present application, the braking structure 20 includes a hydraulic cylinder 21 and a piston rod 22, and the hydraulic cylinder 21 and the piston rod 22 are movably connected;

an accommodating cavity 211 is arranged in the hydraulic cylinder 21, a first end of the piston rod 22 is arranged opposite to the brake disc 10, and the first end of the piston rod 22 can be close to or far away from the brake disc 10;

a partition structure 24 is arranged at the second end of the piston rod 22, the partition structure 24 is slidably connected to the accommodating cavity 211, the accommodating cavity 211 is divided into a hydraulic cavity 2111 and a pre-tightening cavity 2112 by the partition structure 24, and the peripheral side of the partition structure 24 is hermetically connected with the inner wall of the accommodating cavity 211;

the first pipeline 50 and the second pipeline 60 are both communicated with the hydraulic cavity 2111, and an elastic part 25 is arranged in the pre-tightening cavity 2112.

It should be noted that, the braking structure 20 includes a hydraulic cylinder 21 and a piston rod 22, the hydraulic cylinder 21 is used for driving the piston to move in a certain direction, the first end of the piston rod 22 is driven by the hydraulic cylinder 21 to realize the action of approaching to or departing from the brake disc 10, and the hydraulic cylinder 21 is movably connected with the piston rod 22;

the hydraulic cylinder 21 is further internally provided with an accommodating cavity 211, the second end of the piston rod 22 is provided with a dividing structure 24, the dividing structure 24 is connected with the accommodating cavity 211 in a sliding manner, and the first end of the piston rod 22 moves close to or away from the brake disc 10 through the sliding of the dividing structure 24 in the accommodating cavity 211.

In addition, the dividing structure 24 divides the accommodating cavity 211 into a hydraulic cavity 2111 and a pre-tightening cavity 2112, an elastic element 25 is arranged in the pre-tightening cavity 2112, and when the hydraulic pressure is greater than the elastic force of the elastic element 25, the first end of the piston rod 22 is far away from the brake disc 10, so that the brake disc 10 is relieved; when the hydraulic pressure is smaller than the elastic force of the elastic element 25, the first end of the piston rod 22 is close to the brake disc 10, and the brake of the brake disc 10 is realized; the peripheral side of the dividing structure 24 is hermetically connected with the inside of the containing cavity 211, so that the technical effect of preventing hydraulic pressure leakage is achieved.

Specifically, the hydraulic chamber 2111 is connected to the first line 50 of the hydraulic device 30 and the second line 60 of the relief assist device, respectively, and both the hydraulic device 30 and the relief assist device can achieve braking and relief of the brake disc 10.

Optionally, in the embodiment of the present application, a first end of the elastic member 25 is connected to the dividing structure 24, and a second end of the elastic member 25 is connected to the inner wall of the accommodating cavity 211;

the elastic member 25 is at least one of a spring, a torsion spring, a spring plate, and a disc spring.

The elastic piece 25 transmits the pretightening force to the piston rod 22 through the dividing mechanism, and then the pretightening force is applied to the brake disc 10 through the piston rod 22, so that the passive braking function is realized; the elastic member 25 may be at least one of a spring, a torsion spring, a spring plate, and a disc spring, or a combination of two or more of the spring, the torsion spring, the spring plate, and the disc spring, which is not limited in this embodiment. The purpose is to apply a pre-tightening force to the brake disc 10 to achieve passive braking.

It should be noted that, in a normal state, since the elastic element 25 applies a pretightening force to the piston rod 22, the brake clamp 23 clamps the brake disc 10, so as to realize passive braking; when the brake disc 10 needs to be relieved, the hydraulic device 30 provides a certain hydraulic pressure for the hydraulic cylinder 21, and the hydraulic pressure has the effect of overcoming the pre-tightening force, so that the brake clamp 23 releases the brake disc 10 and the braking state is relieved.

Optionally, in the embodiment of the present application, two sets of the hydraulic cylinder 21 and the piston rod 22 are provided, which are a first brake clamp 23 and a second brake clamp 23, respectively, and the first brake clamp 23 and the second brake clamp 23 are respectively disposed on two sides of the brake disc 10 in the axial direction;

the first end of the piston rod 22 is provided with a brake shoe which is detachably connected to the piston rod 22.

Wherein the brake caliper 23 is axially movable relative to the brake disc 10 and wherein the brake caliper 23 comprises a hydraulic cylinder 21. When the braking system is in a braking state, the brake pads and the brake disc 10 are pressed against each other, and the brake pads and the brake disc 10 realize vehicle braking by increasing the friction force.

It should be noted that the first brake caliper 23 and the second brake caliper 23 may be disposed on the same side of the brake disk 10, and during braking, the first brake caliper 23 and the second brake caliper 23 move from the side of the brake disk 10 to a direction away from the brake disk 10; the first brake caliper 23 and the second brake caliper 23 may be oppositely disposed on both sides of the brake disc 10, and the first brake caliper 23 and the second brake caliper 23 may be moved from both sides of the brake disc 10 in a direction away from the brake disc 10 during braking.

It should be noted that the brake caliper 23 is connected to the hydraulic device 30 and the auxiliary release device 40 through the joints, respectively, is connected to the hydraulic device 30 through the first joint 317, and is connected to the auxiliary release device 40 through the second joint 410, wherein the first joint 317 and the second joint 410 may be quick-change joints.

The brake pad may be a semimetal brake pad, a metal-less brake pad, a ceramic brake pad, or the like, but this embodiment is not limited thereto. When the brake pad is worn and needs to be replaced, hydraulic oil is firstly introduced to generate a gap between the brake pad and the brake disc 10, the brake pad is detached from the piston rod 22, and a new brake pad is installed.

Optionally, in the embodiment of the present application, the hydraulic device 30 includes a tank 31, a first electric machine 32, a first gear pump 33, a first filter 314, an accumulator 35, and a first check valve 36, and the tank 31, the first electric machine 32, the first gear pump 33, the first filter 314, the accumulator 35, and the first check valve 36 are connected to each other and form an oil circulation loop;

the first electric motor 32 and the first gear pump 33 are used to pressurize the hydraulic oil in the oil tank 31, which is stored in the accumulator 35 through the first filter 314 and the first check valve 36.

The hydraulic device 30 further includes a tank 31, a first motor 32, a first gear pump 33, a first filter 314, an accumulator 35, a first check valve 36, and the like, for realizing the functions of hydraulic braking and relieving, and the tank 31 further includes a first oil filling port 316, where the first oil filling port 316 is used for filling oil into the tank 31 from the outside. In actual operation, the oil tank 31 is used for storing oil, the hydraulic oil in the oil tank 31 is pressurized by the first motor 32 and the first gear pump 33, high-pressure hydraulic oil is stored in the energy accumulator 35 through the first filter 314 and the first check valve 36, and then the various valve bodies in the first check valve 36, the normally open proportional valve 37, the normally closed proportional valve 38, the first breathing valve 39, the safety brake valve 310, the pressure limiting valve 311, the manual pressure relief valve 312 and the first relief valve 313 are combined to be opened and closed.

It should be noted that the hydraulic device 30 is connected to the brake caliper 23 through an interface, and different oil circulation circuits can increase or decrease the hydraulic pressure in the hydraulic cylinder 21, and different hydraulic pressures are transmitted to the hydraulic cylinder 21 of the brake caliper 23. The hydraulic pressure in the hydraulic cylinder 21 is increased to overcome the pretightening force, so that the friction force between the brake pad and the brake disc 10 is reduced, and the vehicle alleviation is realized; the hydraulic pressure in the hydraulic cylinder 21 is reduced, and vehicle braking is achieved.

Optionally, in the embodiment of the present application, the hydraulic device 30 further includes at least one control valve, and the control valve is configured to change a flow law of the oil circulation circuit to form a plurality of hydraulic braking modes, where the plurality of hydraulic braking modes includes at least one of a service braking mode, a hold braking mode, a safety braking mode, and a parking braking mode.

Wherein, adopt the control valve to realize the different return circuits of fluid circulation, form the multilayer hydraulic pressure mode through different fluid circulation return circuits. In practical applications, service and braking using the service braking mode are required. When the vehicle runs normally, the brake control unit 70 sends an electric signal to control the normally closed proportional valve 38 in the hydraulic device 30 to open, the normally open proportional valve 37 is electrically closed, and the circuit is switched on: the energy accumulator 35, the proportional valve normally closed proportional valve 38 and the passive brake caliper are used, after pressure reaches the caliper, a disc spring in the passive caliper is jacked open, so that the caliper is relieved, and a vehicle can normally run; when the vehicle needs to be switched from a running state to a braking state in the running process, the normally closed proportional valve 38 is closed when power is lost, the normally open proportional valve 37 is opened when power is lost, hydraulic pressure in the clamp is discharged back to the oil tank 31 through the normally open proportional valve 37, and at the moment, the clamp realizes braking through force exerted on the brake disc 10 by the disc spring under the action of the disc spring.

In practical application, when a vehicle encounters an emergency, the safety brake button is pressed down, the safety brake valve 310 is powered off, the hydraulic pressure at the clamp end is discharged to the oil tank 31 through the safety brake valve 310, but the hydraulic pressure cannot be completely discharged to 0 due to the action of the pressure limiting valve 311, the pressure limiting valve 311 can keep the clamp end to have a fixed lower hydraulic pressure, partial spring force can be overcome under the action of the pressure, and the rest spring force is applied to the brake disc 10, namely the safety brake force.

Specifically, there may be a plurality of control methods in the safety braking mode, for example, the vehicle issues a safety braking command → the brake control unit 70 identifies current load information (AW0 < load information < AW 1) → safety braking valve 310 is turned on, where the AW0 is an idle condition, the AW1 is a full seat condition, and then the hydraulic oil in the clamp is overflow and regulated by the pressure limiting valve 311, so as to ensure that the passive clamp has a certain value of safety braking pressure; alternatively, the vehicle issues a safety brake command → the brake control unit 70 recognizes the current load information (the load information ≧ AW1 operating condition) → safety brake valve 310 is on → normally open proportional valve 37 is on (the proportional valve linearly adjusts the clamp pressure according to the load information), because the pressure adjusted by the proportional valve is less than the set value of the pressure limiting valve 311, the vehicle will obtain a safety brake force greater than the AW0 operating condition, and realize the load compensation of the safety brake force under different operating conditions. This embodiment does not set any limit to this.

In practical application, when a vehicle is parked, the whole vehicle is powered off, the normally open proportional valve 37 is powered off and opened, the normally closed proportional valve 38 is powered off and closed, the hydraulic pressure at the clamp end is completely discharged back to the oil tank 31 through the normally open proportional valve 37, and then the disc spring inside the passive clamp applies the maximum spring force to the brake disc 10, namely parking braking force.

It should be noted that the above-mentioned relief or braking is usually performed by the hydraulic device 30, and when the hydraulic device 30 fails, the auxiliary relief device 40 can timely perform the relief or braking.

Optionally, in the embodiment of the present application, at least one of the control valves includes a normally open proportional valve 37 and a normally closed proportional valve 38, the normally open proportional valve 37 can be powered on and powered off to be opened, and the normally closed proportional valve 38 can be powered on and powered off to be closed; alternatively, the first and second electrodes may be,

at least one of the control valves includes a proportional pressure reducing valve 318, and the proportional pressure reducing valve 318 can regulate a drain pressure of the oil.

The control valve comprises a normally open proportional valve 37 and a normally closed proportional valve 38, the normally open proportional valve 37 has the characteristics of being closed when power is supplied and being opened when power is lost, and the normally closed proportional valve 38 has the characteristics of being opened when power is supplied and being closed when power is lost. A normally open proportional valve 37 and a normally closed proportional valve 38 are arranged in the oil circulation loop and used for realizing different oil circulation loops, and further realizing multiple different braking modes.

It should be noted that the pressure reducing valve 318 has a characteristic of adjusting the discharge pressure of the oil, so that the normally open proportional valve 37 and the normally closed proportional valve 38 can be replaced by one proportional pressure reducing valve 318, and the high-pressure oil passing through the proportional pressure reducing valve 318 can be discharged at a required pressure for realizing the same function as the normally open proportional valve 37 and the normally closed proportional valve 38; the hydraulic device 30 also comprises at least one pressure sensor 34, a safety brake valve 310, a pressure limiting valve 311, a manual pressure relief valve 312, a first overflow valve 313 and a first breather valve 39, which are indispensable parts of the realization of multiple oil circulation circuits

Optionally, in the embodiment of the present application, the auxiliary release device 40 includes a solenoid directional valve 41, a second pressure switch 42, a second gear pump 43, and a second motor 44;

when the auxiliary release device 40 is triggered, the electromagnetic directional valve 41 is configured to close the second pipeline 60, the second pressure switch 42 is configured to send a signal to start the second motor 44, the second motor 44 is configured to drive the second gear pump 43 to operate, the second gear pump 43 is configured to establish hydraulic pressure, when the hydraulic pressure reaches an upper operating point of the second pressure switch 42, the pressure switch sends a signal, the second motor 44 stops operating, and the elastic member 25 is released by the hydraulic pressure.

Wherein the auxiliary release device 40 is triggered by an auxiliary release switch, and the auxiliary release device 40 is used for replacing the hydraulic device 30 to realize braking and releasing of the vehicle when the hydraulic device 30 fails. When the auxiliary relieving device 40 is triggered, the electromagnetic directional valve 41 closes the second pipeline 60, the pressure switch sends a signal to start the second motor 44, the second motor 44 drives the second gear pump 43 to work, the second gear pump 43 is used for establishing hydraulic pressure, when the hydraulic pressure reaches the upper working point of the second pressure switch 42, the second pressure switch 42 sends a signal to stop the second motor 44, at the moment, the elastic part 25 is relieved by the hydraulic pressure, and the vehicle relieving is realized.

It should be noted that the auxiliary release device 40 further includes a second pressure switch 42, a second filter 45, a second check valve 46, a second overflow valve 47, and a second breather valve 48, which are used for implementing various oil circulation circuits.

Embodiments of the present application also provide a vehicle including the hydraulic brake system described above.

In the embodiment of the present application, the vehicle having the above-described hydraulic brake system can realize passive braking under the operation of the hydraulic device 30, and can have a plurality of braking modes; when the hydraulic device 30 fails, the auxiliary relief device 40 can still provide hydraulic pressure to the brake structure 20, and the auxiliary brake structure 20 continues to perform passive braking. The embodiment can solve the problem that manual release is needed when a hydraulic brake system in the prior art breaks down, so that the aim of remotely releasing the hydraulic brake system without manual operation is fulfilled when the hydraulic brake system breaks down.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A hydraulic brake system is characterized by comprising a brake disc (10), a brake structure (20), a hydraulic device (30) and an auxiliary relieving device (40), wherein the brake disc (10) is matched with the brake structure (20), the brake structure (20) is connected with the hydraulic device (30) through a first pipeline (50), and the brake structure (20) is connected with the auxiliary relieving device (40) through a second pipeline (60);

the brake structure (20) has a first state for relieving the brake disc (10) and a second state for braking the brake disc (10), and the hydraulic device (30) drives the brake structure (20) to switch between the first state and the second state through hydraulic pressure;

the auxiliary relief device (40) is for providing the hydraulic pressure to the brake structure (20) when the hydraulic device (30) is disabled, assisting the brake structure (20) to switch between the first state and the second state.

2. The hydraulic brake system according to claim 1, characterized in that, when the braking structure (20) is switched from the first state to the second state, the braking structure (20) is close to the brake disc (10), the braking structure (20) presses the brake disc (10); when the braking structure (20) is switched from the second state to the first state, the braking structure (20) is far away from the brake disc (10), and the braking structure (20) releases the brake disc (10).

3. The hydraulic brake system according to claim 1, characterized in that the braking structure (20) comprises a hydraulic cylinder (21) and a piston rod (22), the hydraulic cylinder (21) and the piston rod (22) being movably connected;

an accommodating cavity (211) is formed in the hydraulic cylinder (21), the first end of the piston rod (22) is arranged opposite to the brake disc (10), and the first end of the piston rod (22) can be close to or far away from the brake disc (10);

a dividing structure (24) is arranged at the second end of the piston rod (22), the dividing structure (24) is connected to the accommodating cavity (211) in a sliding mode, the accommodating cavity (211) is divided into a hydraulic cavity (2111) and a pre-tightening cavity (2112) by the dividing structure (24), and the peripheral side of the dividing structure (24) is connected with the inner wall of the accommodating cavity (211) in a sealing mode;

the first pipeline (50) and the second pipeline (60) are communicated with the hydraulic cavity (2111), and an elastic part (25) is arranged in the pre-tightening cavity (2112).

4. A hydraulic braking system according to claim 3, characterized in that a first end of the elastic member (25) is connected to the dividing structure (24) and a second end of the elastic member (25) is connected to an inner wall of the housing chamber (211);

the elastic piece (25) is at least one of a spring, a torsion spring, a spring sheet and a disc spring.

5. The hydraulic brake system according to claim 4, characterized in that the hydraulic cylinder (21) and the piston rod (22) are provided with two sets, a first brake caliper (23) and a second brake caliper (23), respectively, the first brake caliper (23) and the second brake caliper (23) being provided on both sides of the brake disc (10) in the axial direction, respectively;

the first end of the piston rod (22) is provided with a brake pad which is detachably connected with the piston rod (22).

6. The hydraulic brake system according to claim 1, characterized in that the hydraulic device (30) comprises a tank (31), a first electric motor (32), a first gear pump (33), a first filter (314), an accumulator (35) and a first check valve (36), the tank (31), the first electric motor (32), the first gear pump (33), the first filter (314), the accumulator (35) and the first check valve (36) being connected to each other and forming an oil circulation circuit;

the first motor (32) and the first gear pump (33) are used for pressurizing hydraulic oil in the oil tank (31), and the hydraulic oil is stored in the accumulator (35) through the first filter (314) and the first check valve (36).

7. The hydraulic brake system of claim 6, wherein the hydraulic device (30) further includes at least one control valve for varying the flow regime of the oil circulation circuit to create a plurality of hydraulic braking modes including one of a service braking mode, a hold braking mode, a safety braking mode, and a park braking mode.

8. A hydraulic braking system according to claim 7 wherein at least one of the control valves comprises a normally open proportional valve (37) and a normally closed proportional valve (38), the normally open proportional valve (37) being able to be closed electrically and opened electrically, the normally closed proportional valve (38) being able to be opened electrically and closed electrically; alternatively, the first and second electrodes may be,

at least one of the control valves includes a proportional pressure reducing valve (318), the proportional pressure reducing valve (318) being capable of regulating a drain pressure of the oil.

9. The hydraulic brake system according to claim 4, wherein the auxiliary release device (40) includes a solenoid directional valve (41), a second pressure switch (42), a second gear pump (43), and a second motor (44);

when the auxiliary relieving device (40) is triggered, the electromagnetic directional valve (41) is used for closing the second pipeline (60), the pressure switch is used for sending a signal to start the second motor (44), the second motor (44) is used for driving the second gear pump (43) to work, the second gear pump (43) is used for establishing hydraulic pressure, when the hydraulic pressure reaches the upper working point of the second pressure switch (42), the second pressure switch (42) sends a signal, the second motor (44) stops working, and the elastic piece (25) is relieved by the hydraulic pressure.

10. A vehicle characterized by comprising the hydraulic brake system according to any one of claims 1 to 9.

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