CN113815579B

CN113815579B - Braking device

Info

Publication number: CN113815579B
Application number: CN202010560889.4A
Authority: CN
Inventors: 廖银生; 黄泰硕; 李大为; 余敏
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2024-02-27
Anticipated expiration: 2040-06-18
Also published as: CN113815579A

Abstract

The invention provides a braking device, which comprises a braking return device and a braking caliper, wherein the braking caliper comprises friction plates arranged on two sides of a braking disc; when hydraulic pressure is supplied to the brake calipers, the brake calipers push the friction plates to be pressed on the brake disc to generate friction torque so as to brake a vehicle, and after the vehicle is braked, the hydraulic pressure is supplied to the brake return device so as to enable the friction plates to be far away from the brake disc under the action of the brake return device, and return of the friction plates is realized.

Description

Braking device

Technical Field

The invention relates to the technical field of vehicle chassis application, in particular to a braking device.

Background

With the development of vehicle braking technology, disc brakes are increasingly applied to large commercial vehicles, the stability performance of the disc brakes is better, and the heat fading tendency of the brakes is greatly reduced, so that the distance required for parking is greatly shortened. However, the friction plate of the conventional disc brake cannot be automatically returned, so that the friction plate and the brake disc are in dragging and sticking, and the friction plate is worn, the oil consumption is increased and the like.

Chinese patent application publication No. CN107575512a discloses a friction plate return mechanism and a pneumatic disc brake with the same, so as to solve the problem that the friction plate of the conventional disc brake cannot return automatically. The friction plate return mechanism consists of air pressure, two friction plates which are oppositely arranged and can move relatively, and a brake disc which is positioned between the two friction plates, wherein an air vent pipeline is arranged on the friction plates, one side of the air vent pipeline, which is opposite to the brake disc, is an air outlet section, an air pipe extends into an air inlet section of the air vent pipeline from the outer side of the friction plate, the air pipe is connected with an air source, when the air source supplies air, the air is blown into the air vent pipeline from the air pipe, and finally, the air is blown to the brake disc along the air vent pipeline, and the air flow can only flow out along a gap between the brake disc and the friction plates.

However, the friction plate return mechanism of the air pressure disc brake is realized by blowing air to the friction plate, the air flows out along the gap between the brake disc and the friction plate to realize active return of the friction plate, air pressure noise can be generated in the return process, and the driving experience of a user is reduced. In addition, the brake distribution valve simultaneously controls the basic brake and the capacity of the friction plate return mechanism, and if the brake distribution valve fails, the basic brake of the whole vehicle can be influenced. In addition, the above-described air disc brake system cannot achieve energy recovery.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the problem that in the prior art, a brake distribution valve of a brake system simultaneously controls foundation braking and a friction plate return mechanism, and the foundation braking of the whole vehicle is influenced if the brake distribution valve fails, the brake system device is provided.

In order to solve the problems, the invention adopts the following technical scheme:

a braking device comprises a braking return device and a braking caliper, wherein the braking caliper comprises friction plates arranged on two sides of a braking disc, and the braking return device is connected with the friction plates, so that the friction plates are far away from the braking disc under the action of the braking return device under the condition that a vehicle is not braked.

Optionally, the braking return device includes initiative return mechanism, initiative return mechanism includes cylinder body and piston thrust mechanism, piston thrust mechanism includes piston and distance rod, the piston slides and sets up in the cylinder body, the one end of distance rod is connected on the piston, the other end of distance rod is connected on the friction disc.

Optionally, the braking device further comprises a first valve and a braking oil can, an oil port of the active return mechanism is connected with the braking oil can through a first pipeline, and the first valve is arranged on the first pipeline.

Optionally, the braking device further comprises a second valve and an accumulator, the first interface of the accumulator is connected to a position of the first pipeline, which is located between the first valve and the oil port of the active return mechanism, through a second pipeline, and the second valve is arranged on the second pipeline.

Optionally, the brake device further comprises a third valve, the second port of the accumulator is connected to the booster of the brake caliper through a third pipeline, and the third valve is arranged on the third pipeline.

Optionally, the piston thrust mechanism is provided with two, the friction plates include an inner friction plate and an outer friction plate, wherein a thrust rod of the piston thrust mechanism is connected to the inner friction plate, and a thrust rod of the piston thrust mechanism is connected to the outer friction plate.

Alternatively, the strokes of both said piston thrust mechanisms are identical.

Optionally, the brake device further comprises a body stabilization system connected between the booster and the brake caliper.

Optionally, the two active return mechanisms are provided, one of the active return mechanisms is provided on a first side of the caliper body support of the brake caliper in the front-rear direction of the vehicle, and the other active return mechanism is provided on a second side of the caliper body support in the front-rear direction of the vehicle.

Optionally, the oil port of one of the active return mechanisms is connected to the first pipeline through a first branch, and the oil port of the other active return mechanism is connected to the first pipeline through a second branch.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a brake device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an active return mechanism of a brake return device according to an embodiment of the present invention;

fig. 3 is a schematic view of another structure of a brake device according to an embodiment of the invention.

Wherein, each reference sign in the figure:

1-a brake return device; 11-a cylinder; 111-check rings; 112-an oil port; 113-radial oil passage; 114-a first through hole; 115-a second through hole; 116-an oil inlet cavity; 12-piston thrust mechanism; 121-a piston; 122-thrust rod; 1221-piston rod; 1222-a push arm; 131-a first branch; 132-a second branch;

2-a brake caliper; 21-a clamp body bracket; 3-a brake disc; 4-friction plate; 41-inner friction plate; 42-outer friction plate;

5-a brake oilcan; 6-an accumulator; 7-a first valve; 8-a second valve; 9-a third valve; 10-a first pipeline; 101-a second pipeline; 102-a third pipeline; 13-a brake line;

14-a booster device; 15-a brake pedal; 16-three-way valve; 17-vehicle body stabilization system.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1 and 2 together, a brake device according to an embodiment of the invention will now be described. The braking device comprises a braking return device 1 and a braking caliper 2, wherein the braking caliper 2 comprises friction plates 4 arranged on two sides of a braking disc 3, and the braking return device 1 is connected with the friction plates 4 so that the friction plates 4 are far away from the braking disc 3 under the action of the braking return device 1 when the vehicle is not braked.

The brake caliper 2 comprises a caliper body and a caliper body support 21, wherein the caliper body is connected to the caliper body support 21 in a sliding mode, and the friction plate 4 is arranged on one side of the brake disc 3. When the booster 14 of the brake caliper 2 supplies hydraulic pressure to the caliper body of the brake caliper 2 during braking, the caliper body pushes the friction plate 4 to be pressed against the brake disc 3, and friction torque is generated to brake the vehicle; after braking is completed, a brake release signal is received, the vehicle supplies the hydraulic pressure of the oil supply device to the brake return device 1 so as to enable the friction plate 4 to be far away from the brake disc 3 under the action of the brake return device 1, and return of the friction plate 4 is realized.

In an embodiment, referring to fig. 1 and 2, the brake return device includes an active return mechanism 1, the active return mechanism 1 includes a cylinder 11 and a piston thrust mechanism 12, the piston thrust mechanism 12 includes a piston 121 and a thrust rod 122, the piston 121 is slidably disposed in the cylinder 11, one end of the thrust rod 122 is connected to the piston 121, and the other end of the thrust rod 122 is connected to a friction plate 4 disposed on one side of the brake disc 3, so that the friction plate 4 is far away from the brake disc 3 under the action of the thrust rod 122 when braking is completed.

When braking is completed, hydraulic pressure is supplied to the cylinder 11 of the active return mechanism 1, and the piston 121 in the cylinder 11 moves in a direction away from the center of the cylinder 11 under the action of high-pressure liquid to drive the thrust rod 122 to move in a direction away from the brake disc 3, so that the friction plate 4 connected with the thrust rod 122 is away from the brake disc 3, and the purpose of returning the friction plate 4 is achieved. In addition, when the braking is finished, high-pressure liquid flows through the pipeline and flows into the active return mechanism 1, so that the high-pressure liquid and the friction plate 4 are synchronously away from the brake disc 3, the purpose of returning the friction plate 4 on the side of the brake disc 3 is achieved, and compared with the prior art, high-pressure air injection noise cannot be generated due to the fact that the hydraulic mode is adopted for returning the friction plate 4, the problem that in the prior art, the disc brake generates air pressure noise in the process of automatically returning the friction plate 4 is solved, and driving experience of a user is improved.

In an embodiment, referring to fig. 1 and 2, the thrust rod 122 includes a piston rod 1221 and a thrust arm 1222, one end of the piston rod 1221 is connected to the piston 121, the other end of the piston rod 1221 is connected to one end of the thrust arm 1222, the other end of the thrust arm 1222 is connected to the friction plate 4, and the piston rod 1221 is perpendicular to the friction plate 4.

When braking is completed, a brake release signal is received, high-pressure liquid is controlled to flow into the cylinder 11 of the active return mechanism 1, the piston 121 in the cylinder 11 moves away from the center of the cylinder 11 under the action of the high-pressure liquid, the piston rod 1221 is driven to move away from the center of the cylinder 11, and the piston rod 1221 is perpendicular to the friction plate 4, so that the movement direction of the piston rod 1221, namely, the displacement direction of the friction plate 4, moves away from the center of the cylinder 11, and the movement of the piston rod 1221 drives the thrust arm 1222 connected with the piston rod 1221 and the friction plate 4 on the thrust arm 1222 to move away from the brake disc 3, so that the friction plate 4 is far from the brake disc 3, and the purpose of returning the friction plate 4 is achieved.

The thrust rod 122 includes a piston rod 1221 and a thrust arm 1222, for example, and in other embodiments, the thrust rod 122 may have other configurations, such as being directly coupled to the friction plate 4 by the piston rod 1221.

In an embodiment, referring to fig. 1 and 2, a sleeve is disposed at one end of the thrust arm 1222, and the sleeve is sleeved on the other end of the piston rod 1221. The thrust arm 1222 is connected with the piston rod 1221 through the sleeve, the thrust arm 1222 and the piston rod 1221 are limited, the piston rod 1221 is conveniently detached, the protection effect is achieved, and the safety and the compactness of the thrust rod 122 are improved.

In the present embodiment, the connection between the thrust arm 1222 and the piston rod 1221 is only an exemplary connection manner by sleeving, and in other embodiments, the connection between the thrust arm 1222 and the piston rod 1221 may be other connection manners, for example, the connection between the thrust arm 1222 and the piston rod 1221 may be welded, hinged, etc.

In one embodiment, referring to fig. 1 and 2, the cylinder 11 is fixed to the caliper bracket 21 of the brake caliper 2. The cylinder body 11 is fixed on the caliper body support 21 of the brake caliper 2, so that the structure of the brake device can be simplified, the brake device is stable in the movement process, the caliper body support 21 is arranged above the brake disc 3 easily, the cost is low, the cylinder body 11 of the active return mechanism 1 is limited on the caliper body support 21 of the brake caliper 2, and the safety and the stability of the brake device are improved.

In an embodiment, referring to fig. 1 and 2 together, the piston thrust mechanism 12 includes two friction plates 4, and the friction plate 4 includes an inner friction plate 41 and an outer friction plate 42, wherein a thrust rod 122 of one piston thrust mechanism 12 is connected to the inner friction plate 41, and a thrust rod 122 of the other piston thrust mechanism 12 is connected to the outer friction plate 42.

When braking is completed, a braking release signal is received, after the high-pressure liquid is controlled to flow into the cylinder body 11 of the active return mechanism 1, the two piston thrust mechanisms 12 can synchronously move in the direction away from the center of the cylinder body 11 under the action of the high-pressure liquid, so that the inner friction plate 41 and the outer friction plate 42 synchronously move away from the brake disc 3, the structure is simpler, the return of the inner friction plate 41 and the outer friction plate 42 can be realized without other auxiliary return devices, and the occupied space of the braking device is saved.

In other embodiments, the piston pushing mechanism 12 may be one, so as to achieve the return of the friction plates 4 by driving the two friction plates 4 simultaneously with other auxiliary return devices.

In one embodiment, referring to fig. 1 and 2, the strokes of the two piston thrust mechanisms 12 are the same. The strokes of the two piston thrust mechanisms 12 are identical, the piston thrust mechanisms have completely symmetrical structures, the synchronous return of the inner friction plate 41 and the outer friction plate 42 can be realized by ensuring the same hydraulic pressure, and other stroke synchronization devices are not needed.

In an embodiment, referring to fig. 1 and 2, two ends of the cylinder 11 are respectively provided with a first through hole 114 and a second through hole 115, the aperture of the first through hole 114 is smaller than the outer diameter of the piston 121, the aperture of the second through hole 115 is larger than the outer diameter of the piston 121, a limit groove is formed in the cylinder 11 at a position outside the second through hole 115, and a retainer ring 111 is disposed in the limit groove.

The two ends of the cylinder body 11 are respectively provided with a first through hole 114 and a second through hole 115, the aperture of the first through hole 114 is smaller than the outer diameter of the piston 121, the aperture of the second through hole 115 is larger than the outer diameter of the piston 121, the piston 121 is conveniently installed in the cylinder body 11 from the first through hole 114, a limiting groove is formed in the position, located outside the second through hole 115, of the cylinder body 11, a retainer ring 111 is arranged in the limiting groove, the piston 121 is limited, the moving stroke of the piston 121 is guaranteed, the piston 121 is prevented from falling off, the tightness of the cylinder body 11 is improved, and the safety and reliability of the brake device are further improved.

In an embodiment, referring to fig. 1 and 2, the cylinder 11 further includes an oil inlet cavity 116, the oil port 112 of the active return mechanism 1 is an oil inlet/outlet port 112 of the oil inlet cavity 116, and a radial oil passage 113 is disposed on the cylinder 11 and communicates the oil inlet cavity 116 with an internal cavity of the cylinder 11.

When braking is completed, a braking release signal is received, high-pressure liquid is controlled to flow into the oil inlet cavity 116 through the oil port 112 and then flow into the cylinder 11 through the radial oil passing channel 113, when the hydraulic pressure in the cylinder 11 reaches a certain degree, the hydraulic pressure acts on the piston thrust mechanism 12 to push the piston thrust mechanism 12 to move, and because of internal communication and the same hydraulic pressure, the two piston thrust mechanisms 12 can be synchronously pushed to move, so that the inner friction plate 41 and the outer friction plate 42 are synchronously far away from the brake disc 3.

The shape and size of the oil inlet cavity 116 can be changed according to the actual size, shape and other requirements, so as to realize the piston thrust mechanism 12 of the synchronous driving moving and returning mechanism, and further achieve the aim of synchronously returning the inner friction plate 41 and the outer friction plate 42.

In one embodiment, two active return mechanisms 1 are provided, one of the active return mechanisms 1 is disposed on a first side of the caliper body bracket 21 of the brake caliper 2 in the vehicle front-rear direction, and the other active return mechanism 1 is disposed on a second side of the caliper body bracket 21 in the vehicle front-rear direction. The two active return mechanisms 1 are arranged, at least two points of connection with the friction plates 4 are guaranteed, when braking is completed, the two friction plates 4 can be synchronously pushed to be synchronously away from the brake disc 3, the problem that the friction plates 4 cannot be completely returned due to the fact that only one single point of pushing friction plates 4 generates deflection when one active return mechanism 1 is avoided, the return performance of the braking return device 1 is improved, and the overall performance of the braking device is further improved.

In other embodiments, other numbers of active return mechanisms 1 may be provided by positional adjustment, while ensuring that the push friction plate 4 does not deflect.

In an embodiment, referring to fig. 1, 2 and 3, the oil ports 112 of the two active return mechanisms 1 are connected by a pipeline. The oil port 112 of one of the active return mechanisms 1 is connected to the first pipeline 10 through a first branch 131, and the oil port 112 of the other active return mechanism 1 is connected to the first pipeline 10 through a second branch 132.

The oil port 112 of the two driving return mechanisms 1 is connected to the pipeline, so that the pipeline can be connected with the two driving return mechanisms 1 at the same time, the two driving return mechanisms 1 can supply oil synchronously, the friction plate 4 can realize return synchronously, and pipeline components are reduced.

In addition, when the braking is finished, high-pressure liquid flows through the oil inlet cavity 116 of the inflow active return mechanism 1 through the pipeline and then flows into the cylinder 11 of the active return mechanism 1 through the radial oil passing channel 113, two pistons in the cylinder 1 synchronously move in the direction away from the center of the cylinder 11 under the action of the high-pressure liquid, and then drive two thrust rods 1221 to move in the direction away from the brake disc 3, so that the friction plates 4 connected with the thrust rods 1221 synchronously move away from the brake disc 3, the purpose of driving the friction plates 4 at the side of the brake disc 3 to return is achieved, and the purpose of returning the friction plates 4 is achieved in a hydraulic mode.

In an embodiment, referring to fig. 3, the braking device further includes a first valve 7 and a brake oil can 5, the oil port 112 of the active return mechanism 1 is connected to the brake oil can 5 through a first pipeline 10, and the first valve 7 is disposed on the first pipeline 10. When a braking signal is received and vehicle braking starts, the booster 14 supplies hydraulic pressure to the caliper body in the brake caliper 2, the hydraulic pressure in the caliper body pushes the friction plate 4 to be tightly pressed on the brake disc 3, in the process, the friction plate 4 drives the thrust rod 122 and the piston 121 to move towards the center of the cylinder body 11 of the brake return device 1, at the moment, the first valve 7 is in an open state, the first pipeline 10 between the active return mechanism 1 and the brake oilcan 5 is communicated, the cylinder body 11 in the active return mechanism 1 is in a pressure relief state, so that the hydraulic pressure in the cylinder body 11 flows into the first pipeline 10 from the oil port 112, finally, the hydraulic pressure flows into the brake oilcan 5 to be relieved, vehicle braking is realized, recovery of hydraulic energy in the active return mechanism 1 is realized, energy is fully utilized, unnecessary energy loss is reduced, and the endurance mileage of the vehicle is further improved.

When it is detected that the user has depressed the brake pedal 15 of the vehicle, then the receipt of the brake signal is merely illustrative, and in other embodiments, the manner in which the brake signal is received may be other.

The first valve 7 is an electromagnetic valve, so that a user can control the first valve 7 through an electric signal, the control accuracy of the braking device is improved, and in other embodiments, the first valve 7 can also be other control valves.

In an embodiment, referring to fig. 3, the braking device further includes a second valve 8 and an accumulator 6, the first port of the accumulator 6 is connected to a position between the first valve 7 and the oil port 112 of the active return mechanism 1 of the first pipeline 10 through a second pipeline 101, and the second valve 8 is disposed on the second pipeline 101. After the vehicle is braked, the accumulator 6 is arranged, a brake release signal is received, the second valve 8 is controlled to be opened, a second pipeline 101 between the active return mechanism 1 and the accumulator 6 is communicated, at the moment, the hydraulic pressure in the accumulator 6 is used for flowing through the second pipeline 101 and flowing into the brake return device 1, after flowing into the brake return device 1, the piston thrust mechanism 12 is pushed to move, so that the friction plate 4 is far away from the brake disc 3 under the action of the brake return device 1, the return of the friction plate 4 is realized, and at the moment, the first valve 7 is in a closed state in order to avoid the pressure release of the active return mechanism 1 through the brake oilcan 5.

When it is detected that the user releases the brake pedal 15 of the vehicle, a brake release signal is received, but in other embodiments the manner in which the brake release signal is received may be other.

The energy supply for the foundation brake and the return of the friction plate 4 in the brake device are separated, the brake hydraulic pressure of the brake caliper 2 is supplied by the booster 14, and the return hydraulic pressure of the friction plate 4 of the brake return device 1 is supplied by the accumulator 6, so that the foundation brake function is not affected when the return function of the friction plate 4 is problematic. The second valve 8 is an electromagnetic valve, so that a user can control the second valve 8 through an electrical signal, the control accuracy of the braking device is improved, and in other embodiments, the second valve 8 can also be other control valves, which are not described herein.

In an embodiment, referring to fig. 3, the braking device further comprises a third valve 9, the second port of the accumulator 6 is connected to the booster 14 of the brake caliper 2 through a third pipeline 102, and the third valve 9 is disposed on the third pipeline 102. Wherein the booster 14 of the brake caliper 2 is connected to the caliper body of the brake caliper 2 through a brake pipe 13, and the brake pipe 13 is connected with a third pipe 102 through a three-way valve 16.

When the vehicle brakes, a braking signal is received, the third valve 9 is controlled to be opened, a third pipeline 102 between the booster 14 and the accumulator 6 is communicated, when the booster 14 of the brake caliper 2 supplies hydraulic pressure to the caliper body of the brake caliper 2, the hydraulic pressure supplied by the booster 14 also flows into the accumulator 6 through the third pipeline 102 at the same time, the accumulator 6 is pressurized and stored, when the hydraulic pressure in the accumulator 6 reaches the pre-pressure P0 of the hydraulic pressure signal of the accumulator 6, the third valve 9 is closed, the third pipeline 102 between the booster 14 and the accumulator 6 is disconnected, and the energy storage and the pressurization of the accumulator 6 are completed.

The third valve 9 is an electromagnetic valve, so that a user can control the third valve 9 through an electric signal, the control accuracy of the brake device is improved, and in other embodiments, the third valve 9 can also be other control valves. The energy accumulator 6 can be actively pressurized during service braking, so that the energy of the energy accumulator 6 is fully utilized to return the friction plate 4 after the follow-up braking is finished, an external booster is not needed, the structure is simple, the energy can be recycled, and the economical efficiency is improved.

In one embodiment, referring to fig. 1 to 3, the brake device further includes a body stabilization system 17, and the body stabilization system 17 is connected between the booster 14 and the brake caliper 2. The brake device further comprises a body stabilizing system 17 (ESP), the body stabilizing system 17 is connected between the booster 14 and the brake caliper 2, when it is determined that the vehicle is in emergency braking, in order to avoid locking of the vehicle, the body stabilizing system 17 needs to be controlled to be in a pressure release state, at this time, the third valve 9 and/or the first valve 7 are opened, the second valve 8 is closed, hydraulic pressure in the caliper body of the brake caliper 2 flows into the third pipeline 102 through the brake pipeline 13, finally enters the accumulator 6 to pressurize and store the energy of the accumulator 6, when the hydraulic pressure of the accumulator 6 reaches the energy recovery pressure P1, the third valve 9 is closed, and the accumulator 6 completes the energy recovery function when the body stabilizing system 17 releases pressure. The pressure P1 may be the same as the pressure P0, and the pressure P1 may be greater than or less than the pressure P0.

When the vehicle body stabilizing system is required to release pressure in the driving process, the valve in the braking device is controlled to release pressure of the vehicle body stabilizing system, so that the vehicle is prevented from locking, on the basis, the energy storage and the pressurization of the energy accumulator are realized, the partial energy recovery of the vehicle can be realized, the energy is fully utilized, the unnecessary energy loss is reduced, and the cruising mileage of the vehicle is further improved.

The working principle of the braking device is as follows: when the vehicle brakes, a braking signal is received, the third valve 9 is controlled to be opened, a third pipeline 102 between the booster 14 and the accumulator 6 is communicated, when the booster 14 of the brake caliper 2 supplies hydraulic pressure to the caliper body of the brake caliper 2, the hydraulic pressure supplied by the booster 14 also flows into the accumulator 6 through the third pipeline 102 at the same time, the accumulator 6 is pressurized and stored, when the hydraulic pressure in the accumulator 6 reaches the pre-pressure P0 of the hydraulic pressure signal of the accumulator 6, the third valve 9 is closed, the third pipeline 102 between the booster 14 and the accumulator 6 is disconnected, and the energy storage and the pressurization of the accumulator 6 are completed; after the braking of the vehicle is finished, a braking release signal is received, the second valve 8 is controlled to be opened, a second pipeline 101 between the active return mechanism 1 and the energy accumulator 6 is communicated, at the moment, the energy accumulator 6 is used for flowing through the second pipeline 101 and flowing into the braking return device 1, and after hydraulic pressure flows into the braking return device 1, the piston thrust mechanism 12 is pushed to move, so that the friction plate 4 is far away from the brake disc 3 under the action of the braking return device 1, and the return of the friction plate 4 is realized. In the present embodiment, the control of the returning of the friction plate 4 is separated from the control of the foundation brake, the vehicle brake is controlled by the brake caliper 2, the returning of the friction plate 4 is controlled by the brake returning device 1, and when the function of returning the friction plate 4 is problematic, the foundation brake function is not affected.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The brake device is characterized by comprising a brake return device and a brake caliper, wherein the brake caliper comprises friction plates arranged on two sides of a brake disc, and the brake return device is connected with the friction plates so that the friction plates are far away from the brake disc under the action of the brake return device under the condition that a vehicle is not braked;

the braking return device comprises an active return mechanism, the active return mechanism comprises a cylinder body and a piston thrust mechanism, the piston thrust mechanism comprises a piston and a thrust rod, and the piston is arranged in the cylinder body in a sliding manner; the piston thrust mechanism is provided with two friction plates, wherein each friction plate comprises an inner friction plate and an outer friction plate, one of the friction plates is connected with the thrust rod of the piston thrust mechanism, and the other friction plate is connected with the outer friction plate;

the cylinder body further comprises an oil inlet cavity, an oil port of the active return mechanism is an oil inlet and outlet port of the oil inlet cavity, and a radial oil passing channel for communicating the oil inlet cavity with an inner cavity of the cylinder body is arranged on the cylinder body;

the braking device further includes:

the hydraulic oil port of the active return mechanism is connected with the brake oil pot through a first pipeline, and the first valve is arranged on the first pipeline;

the first interface of the energy accumulator is connected to a position, between the first valve and the oil port of the active return mechanism, of the first pipeline through a second pipeline, and the second valve is arranged on the second pipeline;

the second interface of the energy accumulator is connected to a booster device of the brake caliper through a third pipeline; the brake caliper is provided with brake fluid pressure by a booster, and the friction plate return fluid pressure of a brake return device is provided by an accumulator.

2. The brake apparatus of claim 1, further comprising a third valve disposed on the third line.

3. A braking apparatus according to claim 1, wherein the strokes of the two piston thrust mechanisms are the same.

4. A brake arrangement according to any one of claims 1-3, further comprising a body stabilizing system connected between the booster and the brake caliper.

5. A brake apparatus according to any one of claims 1 to 3, wherein there are provided two active return mechanisms, one of which is provided on a first side of a caliper body bracket of the brake caliper in the vehicle front-rear direction, and the other of which is provided on a second side of the caliper body bracket in the vehicle front-rear direction.

6. A brake arrangement according to any one of claims 1-3, wherein the port of one of the active return mechanisms is connected to the first conduit via a first branch and the port of the other of the active return mechanisms is connected to the first conduit via a second branch.