Vehicle hydraulic brake device with mechanical backup brake and application

Abstract

The application discloses a vehicle hydraulic braking device with mechanical backup braking and application, and the device comprises a hydraulic braking unit and a mechanical backup braking unit; the hydraulic braking unit comprises a brake piston and a brake block in a brake shell; a hydraulic cavity between the brake piston and a brake piston cylinder is connected with a hydraulic oil path control unit to drive the brake piston and the brake block through the hydraulic pressure; the mechanical backup braking unit comprises an energy storage spring, a backup brake piston rod and an unloading unit arranged in a backup brake shell; an energy storage hydraulic cavity is arranged between the backup brake piston rod and the brake shell, and the energy storage hydraulic cavity is connected with an energy storage oil channel; the energy storage hydraulic cavity is connected with the unloading unit, and hydraulic oil in the energy storage hydraulic cavity is discharged through the unloading unit; a rod part of the backup brake piston can be transmitted into a brake shell hydraulic cavity to drive the brake piston and the brake block. The device can brake the wheels through the mechanical backup braking unit when a hydraulic braking oil path fails, and the reliability and safety of braking are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of vehicle braking, and particularly relates to a vehicle hydraulic braking device with mechanical backup braking and application. BACKGROUND

[0002] With the continuous development of modern industry and the increasing busy of transportation, the reliability and safety of vehicle braking devices become crucial factors. Among numerous braking systems, hydraulic braking devices are widely used in various vehicles and mechanical equipment due to their efficient brake force transmission and relatively precise control performance.

[0003] Currently, traditional hydraulic braking devices mainly rely on hydraulic systems to achieve braking functions. The hydraulic braking system pushes the brake pedal by the driver, and the pedal pushes the piston in the brake master cylinder through a mechanical linkage mechanism, so that the hydraulic oil flows in the pipeline and pushes the brake piston, thereby making the brake friction plate and the brake disc or brake drum contact to generate friction force, achieving the braking of vehicles or equipment. This hydraulic braking method can provide relatively reliable braking performance under normal circumstances.

[0004] However, the existing hydraulic braking devices also have some deficiencies. On the one hand, the hydraulic braking system has high requirements for the quality and pressure stability of hydraulic oil. If the hydraulic oil leaks, is contaminated, or has insufficient pressure, it will seriously affect the braking effect, and even cause braking failure. On the other hand, the components of the hydraulic braking system are relatively complex, including the brake master cylinder, the brake wheel cylinder, and the brake pipeline. Once a certain component fails, it may cause the entire braking system to malfunction.

[0005] In actual application, especially in some occasions with extremely high safety requirements, such as commercial vehicles, special vehicles, and some critical industrial equipment, relying solely on hydraulic braking devices may not meet the safety requirements. Once the hydraulic braking system fails, it may cause serious accidents, resulting in personnel injuries and property losses.

[0006] Therefore, in order to improve the reliability and safety of the braking device, there is an urgent need for a new type of braking device that can provide effective backup braking function when the hydraulic braking system fails, ensuring the safe stopping of vehicles or equipment. SUMMARY

[0007] In order to solve the deficiencies in the prior art, the application provides a vehicle hydraulic braking device with mechanical backup braking and application. The device can brake the wheels through the mechanical backup braking device when the hydraulic braking oil circuit fails and cannot establish braking pressure, achieving the purpose of backup braking in hydraulic braking and avoiding vehicle accidents.

[0008] The technical solutions adopted by the application are as follows:

[0009] A vehicle hydraulic braking device with mechanical backup braking, comprising a hydraulic braking unit and a mechanical backup braking unit;

[0010] The hydraulic braking unit comprises a braking housing, a hydraulic oil path control unit, a braking unit;

[0011] The braking housing is internally provided with a braking piston cylinder;

[0012] The braking unit comprises a braking piston and a braking block; the braking piston is movably installed in the braking piston cylinder, and a hydraulic cavity is formed between one end of the braking piston and the braking piston cylinder; the braking block is movably installed at the other end of the braking piston;

[0013] The hydraulic oil path comprises a valve core hole, a valve core, a valve core electromagnetic iron push rod, an oil inlet, an oil return, a braking main oil way, and an energy storage oil way; the oil inlet, the oil return, and the braking main oil way are connected with the valve core hole; the valve core electromagnetic iron push rod is provided at both ends of the valve core hole, and the valve core is movably installed in the valve core hole; the position of the valve core in the valve core hole is changed by the valve core electromagnetic iron push rod, thereby controlling the opening or closing of the oil return, the braking main oil way, and the energy storage oil way;

[0014] The mechanical backup braking unit comprises a backup braking housing, an energy storage spring, a backup braking piston rod, and an unloading unit; the backup braking housing is fixedly connected with the braking housing, and the backup braking housing is internally provided with a cylinder barrel; the piston part of the backup braking piston rod is in contact with the inner wall of the cylinder barrel through the energy storage spring, the rod part of the backup braking piston rod is connected with the braking housing, and an energy storage hydraulic cavity is formed between the rod part and the braking housing; the energy storage hydraulic cavity is connected with the energy storage oil way; the energy storage hydraulic cavity is connected with the unloading unit, and the hydraulic oil in the energy storage hydraulic cavity is discharged through the unloading unit.

[0015] Further, both ends of the valve core are provided with shaft shoulder structures, and the two shaft shoulders are connected by a valve core shaft; during the movement of the valve core, when the shaft shoulders move to the hole positions of the oil inlet, the oil return, the braking main oil way, or the energy storage oil way, the hole positions are closed; when the shaft shoulders move away from the hole positions, the hole positions are restored to be in communication.

[0016] Further, a left reset spring and a right reset spring are respectively arranged at the left and right sides of the valve core; one end of each of the left reset spring and the right reset spring is in contact with the end face of the valve core hole, and the other end is in contact with the side end face of the valve core.

[0017] Further, the unloading unit comprises an unloading spool hole, an unloading spool, and an unloading electromagnet push rod, the unloading spool hole is provided with an unloading oil channel II and an unloading oil channel I, the unloading oil channel I is connected with the energy storage hydraulic cavity; the unloading electromagnet push rod is arranged at the opening side of the unloading spool hole, the unloading spool is movably arranged in the unloading spool hole, one side of the unloading spool is connected with the unloading electromagnet push rod, the unloading spool is driven by the unloading electromagnet push rod to reciprocate in the unloading spool hole, the position of the unloading spool in the unloading spool hole is changed, and the closing or conduction of the unloading oil channel I and the unloading oil channel II is adjusted.

[0018] Further, the unloading valve reset spring, the unloading spool, and the unloading electromagnet push rod are sequentially arranged in the unloading spool hole from the closed end to the opening end, and the three are in contact with each other.

[0019] Further, a groove is arranged on the inner wall of the through hole on the brake shell in the circumferential direction, and a sealing ring is arranged in the groove.

[0020] Further, a groove is arranged on the side wall of the piston part of the brake piston rod, and a sealing ring is arranged in the groove.

[0021] A vehicle, the brake system of the vehicle adopts the vehicle hydraulic brake device with mechanical backup braking.

[0022] Further, the oil inlet is connected with the high-pressure oil circuit of the vehicle hydraulic system, the oil return port is connected with the hydraulic oil tank, and the unloading oil channel II is connected with the oil tank of the vehicle hydraulic system.

[0023] Further, the electromagnet push rods in the vehicle hydraulic brake device are connected with the controller signal, and the controller adjusts and controls the working state of the electromagnet push rods according to the vehicle state.

[0024] The beneficial effects of the present application are as follows:

[0025] (1) The vehicle hydraulic brake device with mechanical backup braking designed in the present application can meet the needs of different working conditions through the control of the electromagnets on the left and right sides, such as normal driving without braking, normal braking, and backup braking of the brake. The hydraulic brake device adopts an electromagnetic valve for braking control, which can realize accurate regulation and control of the braking process. The electromagnetic valve has the characteristics of fast response speed and high control precision, can accurately adjust the flow and pressure of the hydraulic oil according to different driving conditions and the needs of the driver, and thus realizes accurate control of the braking force. Whether it is slight braking in daily driving or full-force braking in emergency situations, the stable and reliable braking effect can be ensured. At the same time, accurate braking control can also reduce energy loss during braking and improve the fuel economy of the vehicle.

[0026] (2) In this application, through the control of the right electromagnet, the brake system can store energy in the backup brake device before braking, ensuring that the backup brake device can quickly work in the case of failure of the normal braking device, without additional start-up time, greatly improving the reliability and safety of braking. Compared with other braking systems, this pre-energizing method can provide timely braking assistance at critical moments, effectively avoiding accidents caused by braking system failure. The backup brake device, through the energy of the previously energized spring, drives the brake piston to brake when the normal braking device fails. It is independent of the normal braking system. Even in complex working conditions, such as failure of the conventional braking system, the backup brake device can still maintain stable working performance and provide reliable braking protection for the vehicle. Compared with the traditional hydraulic braking system without backup, this hydraulic braking device with backup is a redundant braking design, which is equivalent to double protection, greatly reducing the risk of accidents caused by braking system failure, and providing more solid protection for the life and property safety of drivers and passengers.

[0027] (3) Since the braking device adopts a combination of mechanical backup and electromagnetic valve control, its structure is relatively simple, and maintenance and maintenance are also more convenient. In daily use, only the electromagnetic valve, hydraulic pipeline and backup brake device need to be checked and maintained regularly to ensure the normal operation of the braking system. Compared with complex electronic mechanical braking systems, this simple structure design reduces maintenance costs and technical difficulties, and improves the convenience of vehicle use. At the same time, for different types of vehicles, the braking device can also be adjusted and optimized accordingly, improving its versatility and adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structure diagram of a vehicle hydraulic braking device with mechanical backup braking of the present application.

[0029] Figure 2 is a valve core structure diagram.

[0030] Figure 3 is a backup brake piston rod structure diagram.

[0031] Figure 4 is a backup brake housing structure diagram.

[0032] Figure 5 is a brake housing structure diagram.

[0033] Figure 6 is an energy storage spring energy storage principle diagram.

[0034] Figure 7 is a normal braking principle diagram.

[0035] Figure 8is backup braking schematic diagram.

[0036] Figure 9 is application case diagram.

[0037] Figure 10 is application case-energy storage spring energy storage schematic diagram.

[0038] Figure 11 is application case-normal braking schematic diagram.

[0039] Figure 12 is application case-mechanical backup braking schematic.

[0040] In the figure, 1, backup braking shell; 2, energy storage spring; 3, backup braking piston rod; 4, sealing ring I; 5, brake shell; 6, left electromagnet push rod; 7, left reset spring; 8, energy storage oil way; 9, valve core; 10, oil inlet; 11, brake main oil way; 12, oil return; 13, right reset spring; 14, right electromagnet push rod; 15, left brake block; 16, right brake block; 17, unloading oil way I; 18, unloading electromagnet push rod; 19, unloading oil way II; 20, unloading valve core; 21, unloading valve reset spring; 22, sealing ring II; 23, brake piston; 24, shaft shoulder; 25, valve core shaft; 26, piston; 27, piston rod; 28, cylinder barrel; 29, unloading valve core hole; 30, valve core hole; 31, brake piston cylinder; 32, left brake block groove; 33, right brake block groove; 34, vehicle hydraulic system high pressure oil way; 35, brake disc of wheel; 36, center line of brake disc; 37, through hole; 38, moving pair; 39, controller. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0042] A vehicle hydraulic braking device with mechanical backup braking is designed in the present application, and the structure thereof is shown in the figure, which comprises a hydraulic braking unit and a mechanical backup braking unit. Figures 1-5 The hydraulic braking unit comprises a brake shell 5, a hydraulic oil way control unit and a brake unit.

[0043] The brake unit comprises a brake piston 23 and a brake block. The brake block is symmetrically provided with two brake blocks, i.e. a left brake block 15 and a right brake block 16.

[0044] A brake piston cylinder 31 is formed inside the brake housing 5, and the brake piston cylinder 31 is a semi-closed structure; the brake piston 23 is movably installed inside the brake piston cylinder 31; one end of the brake piston 23 forms a hydraulic cavity with the inner wall of the brake piston cylinder 31, and the other end of the brake piston 23 can extend out of the opening side of the brake piston cylinder 31. A left brake block 15 is movably installed outside the opening side of the brake piston cylinder 31, and a right brake 16 is arranged opposite to the left brake block 15, and the right brake 16 is fixedly connected with the brake housing 5.

[0045] The hydraulic oil path control unit includes a valve core hole 30, a valve core 9, a valve core electromagnetic iron push rod, an oil inlet 10, an oil return 12, a brake main oil way 11, and an energy storage oil way 8. Among them, the valve core hole 30 is formed inside the brake housing 5, and the oil inlet 10 and the oil return 12 are formed on the valve core hole 30. The valve core hole 30 is connected with the hydraulic cavity of the brake piston cylinder 31 through the brake main oil way 11.

[0046] The valve core 9 is movably installed inside the valve core hole 30, and both ends of the valve core 9 are in the form of shaft shoulders 24, and the two shaft shoulders 24 are connected by a valve core shaft 25; during the movement of the valve core 9, if the shaft shoulder 24 of the valve core 9 moves to the corresponding hole position (such as the oil inlet 10, the oil return 12 or the brake main oil way 11), the hole position will be closed; when the shaft shoulder 24 leaves the hole position, the hole position restores the passage, thereby realizing the control of the on-off of the oil path.

[0047] Valve core electromagnetic iron push rods are arranged at both ends of the valve core hole 30, and the valve core electromagnetic iron push rods are used to push the valve core 9 to move in the valve core hole 30, change the position of the valve core 9, and realize the control of the on-off of the oil path.

[0048] In this embodiment, a left electromagnetic iron push rod 6 and a right electromagnetic iron push rod 14 are arranged respectively at the left and right sides of the valve core hole 30; by controlling the extension or shortening of the left electromagnetic iron push rod 6 and the right electromagnetic iron push rod 14, the position of the valve core 9 in the valve core hole 30 can be adjusted.

[0049] In the present embodiment, in order to enable the rapid reset of the valve core 9, the present application is provided with a valve core reset spring at both ends of the valve core 9, more specifically, a left reset spring 7 and a right reset spring 13 are respectively arranged at the left and right sides of the valve core 9, one end of the left reset spring 7 and the right reset spring 13 respectively contacts the end face of the valve core hole 30, and the other end contacts the two side end faces of the valve core 9. In the initial position, the left electromagnetic iron push rod 6 and the right electromagnetic iron push rod 14 are both away from the two ends of the valve core 9 by a certain stroke distance, and do not contact the two side end faces of the valve core 9; at this time, the left reset spring 7 and the right reset spring 13 are also at the natural length; when the electromagnetic iron push rod on one side pushes the valve core 9 to move to the other side, the reset spring on the same side as the working electromagnetic iron push rod is stretched, and the reset spring on the other side is compressed; if the pushing process ends, when the electromagnetic iron push rod is retracted and reset, the valve core 9 is driven to return to the initial position under the action of the reset spring.

[0050] The mechanical backup brake unit comprises a backup brake housing 1, an energy storage spring 2, a backup brake piston rod 3 and an unloading unit; wherein the backup brake housing 1 is fastened and installed together with the brake housing 5 by bolts; the inside of the backup brake housing 1 is a semi-closed cylinder 28 structure, and the center line of the cylinder 28 is coaxial with the center line of the brake piston cylinder 31. The backup brake piston rod 3 comprises a piston part and a rod part, the piston part is movably installed in the cylinder 28, the energy storage spring 2 is arranged between the closed end of the cylinder 28 and one side of the piston part, and the other side of the piston part and the brake housing 5 form an energy storage hydraulic cavity, which is connected with the valve core hole 30 through an energy storage oil channel 8. The rod part of the backup brake piston rod 3 is located in the energy storage hydraulic cavity, and the rod part extends into the hydraulic cavity of the brake piston cylinder 31 through a through hole 37 on the brake housing 5, so as to realize the movable connection between the brake housing 5.

[0051] The unloading unit comprises an unloading valve core hole 29, an unloading valve core 20 and an unloading electromagnetic iron push rod 18; wherein the backup brake housing 1 is provided with a semi-closed unloading valve core hole 29, the unloading valve core hole 29 is connected with the energy storage hydraulic cavity through an unloading oil channel I 17, and the unloading valve core hole 29 is also provided with an unloading oil channel II 19. The unloading electromagnetic iron push rod 18 is arranged at the opening side of the unloading valve core hole 29, the unloading valve core 20 is movably installed in the unloading valve core hole 29, one side of the unloading valve core 20 is connected with the unloading electromagnetic iron push rod 18, the unloading electromagnetic iron push rod 18 drives the unloading valve core 20 to reciprocate in the unloading valve core hole 29, so as to change the position of the unloading valve core 20 in the unloading valve core hole 29. During the movement of the unloading valve core 20 along the unloading valve core hole 29, the unloading valve core 20 will close or open the unloading oil channel I 17 or the unloading oil channel II 19.

[0052] In the embodiment, in order to realize the quick reset of the unloading valve core 20, the unloading valve reset spring 21, the unloading valve core 20 and the unloading electromagnetic iron push rod 18 are sequentially arranged in the unloading valve core hole 29 from the closed end to the open end, and the three are in contact with each other; the unloading valve core 20 is moved along the unloading valve core hole 29 by the unloading electromagnetic iron push rod 18 pushing inward, and the unloading valve reset spring 21 is compressed; when the unloading electromagnetic iron push rod 18 is retracted, the unloading valve core 20 is reset under the action of the unloading valve reset spring 21.

[0053] In the embodiment, in order to ensure the sealing between the hydraulic cavity and the energy storage hydraulic cavity, a groove is arranged on the inner wall of the through hole 37 on the brake housing 5 in the circumferential direction, and a sealing ring 22 is installed in the groove.

[0054] In the embodiment, in order to ensure the sealing between the energy storage hydraulic cavity and the cavity where the energy storage spring 2 is located, a groove is opened on the piston part side wall of the brake piston rod 3, and a sealing ring 4 is installed in the groove.

[0055] In the embodiment, the oil inlet 10 is connected with the high-pressure oil circuit 34 of the vehicle hydraulic system, the oil return port 12 is connected with the hydraulic oil tank, and the unloading oil channel II 19 is connected with the oil tank of the vehicle hydraulic system.

[0056] The working principle of the hydraulic brake device with mechanical backup brake designed in the application is described as follows:

[0057] (1) Energy storage spring principle

[0058] As shown in Figure 6 , when the right electromagnetic iron push rod 14 is electrified, the right electromagnetic iron push rod 14 is elongated and pushes the valve core 9 to move left, the oil inlet 10 is connected with the energy storage oil channel 8, the main brake oil channel 11 and the oil return port 12 are connected; at this time, the pressure oil enters the energy storage oil channel 8 from the oil inlet 10, and enters the hydraulic oil tank in the cylinder barrel 28 through the energy storage oil channel 8, under the action of the high-pressure oil, the backup brake piston rod 3 moves left, and the energy storage spring 2 is compressed, so that the energy storage spring 2 is energized; at the same time, the push rod of the brake piston rod 3 is away from the end surface of the brake piston 23.

[0059] (2) Brake non-braking working condition principle

[0060] As shown in Figure 1 , when the left electromagnetic iron push rod 6 and the right electromagnetic iron push rod 14 are not electrified, the valve core 9 is pushed by the left reset spring 7 and the right reset spring 13, the shaft shoulder of the valve core 9 separates the oil inlet 10 and the energy storage oil channel 8, and separates the oil inlet 10 and the main brake oil channel 11, and the oil return port 12 is connected with the main brake oil channel 11.

[0061] At this time, the pressure inside the brake piston cylinder 31 is unloaded and approximately 0; the thrust of the brake piston 23 on the left brake block 15 is 0, and the brake is in a non-braking condition.

[0062] (3) Principle of normal braking condition of brake

[0063] like Figure 7 As shown, when the vehicle's hydraulic system is normal, when the left electromagnet push rod 6 is energized, the left electromagnet push rod 6 extends and pushes the valve core 9 to move a distance to the right. At this time, the shoulder on the valve core 9 isolates the return port 12 from the main brake oil passage 11, and simultaneously isolates the inlet port 10 from the accumulator oil passage 8. At this time, the inlet port 10 and the main brake oil passage 11 are in a connected state. The high-pressure oil from the inlet port 10 enters the brake piston cylinder 31 through the main brake oil passage 11. Under the action of the high-pressure oil, the brake piston 23 moves to the left and pushes the left brake block 15 to move a distance X to the left, completing the braking action.

[0064] (4) Brake backup braking condition

[0065] like Figure 8 As shown, when the vehicle's hydraulic system malfunctions and cannot supply high-pressure oil to the inlet 10, the unloading electromagnet push rod 18 is energized, extends, and pushes the unloading valve core 20 to the right by a distance. At this time, the unloading oil passage I17 and the unloading oil passage II 19 are connected. The stored high-pressure oil in the cylinder 28 of the backup brake housing 1 flows out through the unloading oil passage 19. There is no high-pressure oil in the cylinder 28. Under the thrust of the storage spring 2, the backup brake piston rod 3 moves to the right, contacts and pushes the brake piston 23 to the right. The brake piston 23 pushes the left brake block 15 to the left by a distance X, completing the backup braking action.

[0066] Application examples:

[0067] The purpose of applying the vehicle hydraulic braking device with mechanical backup braking described in this invention to vehicles is to improve the reliability and stability of the braking system, enabling vehicles to meet different road conditions and driving needs, and ensuring vehicle safety performance.

[0068] Specific implementation as follows Figure 9As shown, the vehicle hydraulic braking device with mechanical backup braking designed in this invention is mounted on the vehicle chassis via a sliding pair 38. The brake disc 35 of the vehicle wheel is mounted between the left brake block 15 and the right brake block 16, and the end face of the brake block 15 and the end face of the brake disc 35 are parallel. The moving direction of the sliding pair 38 is parallel to the center line 36 of the brake disc. The brake housing oil inlet 10 is connected to the high-pressure oil circuit 34 of the vehicle hydraulic system via a hydraulic hose, the oil return port 12 is connected to the hydraulic oil tank via a hydraulic hose, and the unloading oil passage II 19 is connected to the vehicle hydraulic system oil tank via a hydraulic hose. The controller 39 is connected to the left electromagnet push rod 6, the right electromagnet push rod 14, and the unloading electromagnet push rod 18 via signal lines.

[0069] The purpose of this application case is to realize the application of the designed hydraulic braking device with mechanical backup braking on vehicles, so as to meet the braking performance and ensure vehicle safety.

[0070] First step, such as Figure 10 The diagram illustrates the working principle of the energy storage spring during an application case. After the vehicle starts, the controller 39 sends a signal to the right electromagnet push rod 14, energizing it. The right electromagnet push rod 14 extends and pushes the valve core 9 to move a distance to the left, connecting the oil inlet 10 to the energy storage oil passage 8, and connecting the main brake oil passage 11 to the return oil port 12. At this time, pressurized oil enters the energy storage oil passage 8 through the oil inlet 10 and then enters the cylinder 28 of the backup brake housing. Under the action of the high-pressure oil, the backup brake piston rod 3 moves to the left, compressing the energy storage spring 2 and causing it to store energy. Simultaneously, the push rod of the brake piston rod 3 moves away from the end face of the brake piston 23, completing the energy storage action of the backup brake device.

[0071] The second step, as Figure 11 As shown, this illustrates the working principle of the application case during normal braking. When the driver depresses the pedal, the controller 39 sends a signal to the left electromagnet push rod 6, energizing it. The left electromagnet push rod 6 extends and pushes the valve core 9 to move a distance to the right. At this time, the shoulder on the valve core 9 isolates the return port 12 from the main brake oil passage 11, and simultaneously isolates the inlet port 10 from the accumulator oil passage 8. At this time, the inlet port 10 and the main brake oil passage 11 are connected. The high-pressure oil from the inlet port 10 enters the brake piston cylinder 31 through the main brake oil passage 11. Under the action of the high-pressure oil, the brake piston 23 moves to the right and pushes the left brake block 15 to move a distance X to the right relative to the brake housing 5. When the end face of the left brake block 15 contacts the end face of the brake disc 35, under the reaction force of the brake disc 35, the brake housing 5 moves to the left along the direction of the sliding pair 37, thereby driving the right brake block 16 to move to the left. The right brake block 16 contacts and presses against the brake disc 35, completing the braking action of the brake disc 35 on the wheel.

[0072] The third step, asFigure 12 As shown, the application case is shown when the conventional brake fails, the principle of the backup brake device braking. When the vehicle hydraulic system fails to supply high pressure oil to the oil inlet 10, when receiving the driver pedal brake signal, the controller 39 sends a signal to the unloading electromagnetic push rod 18, the unloading electromagnetic push rod 18 is electrified, the unloading electromagnetic push rod 18 is elongated and pushes the unloading valve core 20 to move left a distance, at this time, the unloading oil channel I 17 and the unloading oil channel II 19 are communicated, the high pressure oil in the backup brake shell cylinder 28 flows out through the unloading oil channel I 17 and the unloading oil channel II 19, there is no high pressure oil in the cylinder 28, under the action of the storage spring 2, the backup brake piston rod 3 moves right, contacts and pushes the brake piston 23 to move right, the brake piston 23 pushes the left brake block 15 to move left a distance X, when the end face of the left brake block 15 contacts with the end face of the brake disc 35, under the action of the brake disc 35, the brake shell 5 moves left along the direction of the moving pair 37, thereby driving the right brake block 16 to move left, the right brake block 16 contacts and presses the brake disc 35, and the backup brake of the brake disc 35 of the wheel is completed.

[0073] The above embodiments are only used to illustrate the design idea and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, the protection scope of the present application is not limited to the above embodiments. Therefore, any equivalent changes or modifications made according to the principles and design ideas disclosed by the present application are within the protection scope of the present application.

Claims

1. A hydraulic brake device for a vehicle with mechanical backup braking, characterized by Comprise: Hydraulic brake unit and mechanical backup brake unit; The hydraulic brake unit comprises a brake housing (5), a hydraulic oil path control unit, a brake unit; the brake housing (5) is internally provided with a brake piston cylinder (31); the brake unit comprises a brake piston (23) and a brake block; the brake piston (23) is movably installed in the brake piston cylinder (31), and a hydraulic cavity is formed between one end of the brake piston (23) and the brake piston cylinder (31); the brake block is movably installed at the other end of the brake piston (23); the hydraulic oil path comprises a valve core hole (30), a valve core (9), a valve core electromagnetic iron push rod, an oil inlet (10), an oil return port (12), a brake main oil way (11) and an energy storage oil way (8); the oil inlet (10), the oil return port (12) and the brake main oil way (11) are connected with the valve core hole (30); the valve core electromagnetic iron push rod is provided with two ends of the valve core hole (30), the valve core (9) is movably installed in the valve core hole (30), the position of the valve core (9) in the valve core hole (30) is changed by the valve core electromagnetic iron push rod, and the opening or closing of the oil return port (12), the brake main oil way (11) and the energy storage oil way (8) is controlled; The mechanical backup brake unit comprises a backup brake housing (1), an energy storage spring (2), a backup brake piston rod (3) and an unloading unit; the backup brake housing (1) is fixedly connected with the brake housing (5), and the backup brake housing (1) is internally provided with a cylinder barrel (28); the piston part of the backup brake piston rod (3) is in contact with the inner wall of the cylinder barrel (28) through the energy storage spring (2), the rod part of the backup brake piston rod (3) is connected with the brake housing (5), and an energy storage hydraulic cavity is formed between the rod part of the backup brake piston rod (3) and the brake housing (5); the energy storage hydraulic cavity is connected with the energy storage oil way (8); the energy storage hydraulic cavity is connected with the unloading unit, and hydraulic oil in the energy storage hydraulic cavity is discharged through the unloading unit; the rod part of the backup brake piston rod (3) is movably connected with the brake housing (5).

2. A hydraulic vehicle brake apparatus with mechanical backup brake according to claim 1, characterized in that Both ends of the valve core (9) are in the structure of shaft shoulders (24), and the two shaft shoulders (24) are connected by a valve core shaft (25); during the movement of the valve core (9), when the shaft shoulder (24) moves to the hole position of the oil inlet (10), the oil return port (12), the brake main oil way (11) or the energy storage oil way (8), the hole position is closed; when the shaft shoulder (24) leaves the hole position, the hole position restores the passage.

3. A hydraulic vehicle brake system with mechanical backup according to claim 1, characterized in that A left reset spring (7) and a right reset spring (13) are arranged on the left side and the right side of the valve core (9) respectively, one end of the left reset spring (7) and the right reset spring (13) is in contact with the end face of the valve core hole (30), and the other end is in contact with the two side end faces of the valve core (9).

4. A hydraulic vehicle brake system with mechanical backup according to claim 1, characterized in that The unloading unit comprises an unloading spool hole (29), an unloading spool (20) and an unloading electromagnet push rod (18), the unloading spool hole (29) is provided with an unloading oil channel II (19) and an unloading oil channel I (17), the unloading oil channel I (17) is connected with an energy storage hydraulic cavity; the unloading electromagnet push rod (18) is arranged at the opening side of the unloading spool hole (29), the unloading spool (20) is movably arranged in the unloading spool hole (29), one side of the unloading spool (20) is connected with the unloading electromagnet push rod (18), the unloading electromagnet push rod (18) drives the unloading spool (20) to reciprocate in the unloading spool hole (29), the position of the unloading spool (20) in the unloading spool hole (29) is changed, and the closing or conduction of the unloading oil channel I (17) and the unloading oil channel II (19) is adjusted.

5. A hydraulic vehicle brake arrangement with mechanical backup braking according to claim 4, characterized in that The unloading valve reset spring (21), the unloading spool (20) and the unloading electromagnet push rod (18) are sequentially arranged in the unloading spool hole (29) from the closed end to the opening end, and the three are in contact with each other.

6. A hydraulic vehicle brake system with mechanical backup according to claim 1, characterized in that A groove is arranged on the inner wall of the through hole (37) on the brake housing (5) in the circumferential direction, and a sealing ring (22) is arranged in the groove.

7. A hydraulic vehicle brake system with mechanical backup according to claim 1, characterized in that A groove is arranged on the side wall of the piston part of the brake piston rod (3), and a sealing ring (4) is arranged in the groove.

8. A vehicle characterized by comprising: The brake system of the vehicle adopts the hydraulic brake device with mechanical backup brake of the vehicle according to claim 1.

9. A vehicle as claimed in claim 8, characterised in that The oil inlet (10) is connected with a high-pressure oil path (34) of a vehicle hydraulic system, the oil return port (12) is connected with a hydraulic oil tank, and the unloading oil channel II (19) of the unloading unit is connected with the oil tank of the vehicle hydraulic system.

10. A vehicle as claimed in claim 8, wherein The electromagnet push rods in the hydraulic brake device of the vehicle are connected with a controller (39) in signal, and the controller (39) controls the working state of the electromagnet push rods according to the state of the vehicle.

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