Hydraulic pump, electronic hydraulic brake system and vehicle

Abstract

The utility model discloses a hydraulic pump, an electronic hydraulic braking system and a vehicle, and the hydraulic pump comprises a base, a hydraulic cylinder and a hydraulic cylinder, at least part of the piston part is movably arranged in the cavity, the piston part and the inner wall of the cavity jointly define a hydraulic space used for containing a power medium, and the hydraulic space is provided with a liquid outlet; the power assembly is arranged on the base and provided with an output part, the size of at least part of the output part is larger than that of the cavity, and the output part is located on one side of the cavity and connected with the piston piece so as to control the piston piece to adjust the volume of the hydraulic space; wherein the base is provided with an avoiding space, the avoiding space is arranged on the side face, facing the output part, of the base, and the avoiding space is suitable for avoiding the output part so that the output part can move into the base. According to the hydraulic pump, the avoiding space is arranged on the base, and the stroke of the piston piece is increased, so that the liquid discharge amount of the hydraulic pump is increased, and the hydraulic pump can adapt to more vehicle types.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and in particular to a hydraulic pump, an electronic hydraulic brake system and a vehicle. Background Art

[0002] In the related technology, the hydraulic pump includes a cylinder body, a piston member and a power assembly. The power assembly drives the piston member to reciprocate in the cylinder body. The output part of the power assembly is connected to the piston member. The output part is large in size. During the process of the output part driving the piston member, the cylinder body hinders the movement of the output part, thereby reducing the discharge volume of the hydraulic pump. Utility Model Content

[0003] In view of this, the utility model aims to provide a hydraulic pump, which increases the discharge volume of the hydraulic pump.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A hydraulic pump comprises: a base, the base being provided with a cavity; a piston member, the piston member being at least partially movably arranged in the cavity, the piston member and the inner wall of the cavity jointly defining a hydraulic space for accommodating a power medium, the hydraulic space having a liquid outlet; a power assembly, the power assembly being arranged in the base, the power assembly having an output part, at least a part of the output part having a size larger than a size of the cavity, the output part being located on one side of the cavity and connected to the piston member to control the piston member to adjust the volume of the hydraulic space; wherein the base is provided with an avoidance space, the avoidance space being arranged on the side of the base facing the output part, the avoidance space being suitable for avoiding the output part so that the output part moves into the base.

[0006] According to the hydraulic pump of the embodiment of the utility model, the avoidance space is provided on the base, thereby increasing the stroke of the piston member, thereby increasing the discharge volume of the hydraulic pump, and the hydraulic pump can adapt to more types of vehicle models.

[0007] In addition, the hydraulic pump according to the above embodiment of the utility model may also have the following additional technical features:

[0008] According to some embodiments of the present invention, a mounting hole is provided at one end of the piston member away from the cavity, and part of the mounting portion is inserted into and matched with the mounting hole so that the output portion is connected to the piston member.

[0009] According to some embodiments of the utility model, the power assembly includes: a power member; a telescopic member, the telescopic member is configured as the output part, the telescopic member is telescopically arranged on the power member and is telescopically driven by the power member to drive the piston member to move.

[0010] According to some embodiments of the utility model, the power assembly includes: a rotating motor; a screw, which is installed on the rotating motor and is suitable for rotating under the drive of the rotating motor; a nut, which is configured as the output part, and the nut engages with the screw and drives the piston member to move under the drive of the screw.

[0011] According to some embodiments of the utility model, the hydraulic pump further includes: a housing, wherein the housing and the base together define a working space, the lead screw is rotatably disposed on the housing, and the nut is located in the working space; wherein a buffer gasket is provided between the housing and the nut.

[0012] According to some embodiments of the present invention, the buffer gasket is installed on the side wall of the shell facing the nut; or, the buffer gasket is installed on the side of the nut facing away from the cavity.

[0013] Another object of the present invention is to provide an electronic hydraulic brake system.

[0014] According to the electronic hydraulic braking system of the embodiment of the utility model, it includes: a brake pedal; a sensor, which is suitable for sensing the movement of the brake pedal and sending an electrical signal; a hydraulic pump, which is the hydraulic pump mentioned above; a brake wheel cylinder, which is connected to the fluid outlet and is used to connect the wheels of the vehicle; a control component, which is electrically connected to the sensor and is suitable for receiving the electrical signal and controlling the hydraulic pump to pump the power medium into the brake wheel cylinder to brake the wheels.

[0015] According to the electronic hydraulic brake system of the embodiment of the utility model, the avoidance space is provided on the base, thereby increasing the stroke of the piston member, thereby increasing the discharge volume of the hydraulic pump, and the hydraulic pump can adapt to more types of vehicle models.

[0016] According to some embodiments of the utility model, the electronic hydraulic brake system also includes: a backup master cylinder assembly, in which a master cylinder piston and a medium space accommodating the power medium are provided, the master cylinder piston is connected to the brake pedal and is suitable for adjusting the size of the medium space, the medium space has a medium outlet, and the medium outlet is connected to the brake wheel cylinder through an isolation valve; wherein the liquid outlet is connected to the brake wheel cylinder through an oil supply valve, the isolation valve and the oil supply valve are electrically connected to the control component respectively, and the control component is suitable for controlling the brake wheel cylinder to switch the liquid outlet and the medium outlet.

[0017] According to some embodiments of the present invention, the electronic hydraulic brake system further includes: a pedal feel simulation member, the pedal feel simulation member is connected to the medium space, and the pedal feel simulation member is connected to the brake pedal to feed back changes in the medium space to the brake pedal.

[0018] Another object of the present invention is to provide a vehicle.

[0019] A vehicle according to an embodiment of the utility model includes the above-mentioned electronic hydraulic brake system.

[0020] According to the vehicle of the embodiment of the utility model, the avoidance space is provided on the base, thereby increasing the stroke of the piston member, thereby increasing the discharge volume of the hydraulic pump, and the hydraulic pump can adapt to more types of vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0022] Figure 1 is a cross-sectional view of a hydraulic cylinder in an embodiment of the utility model;

[0023] Figure 2 is a schematic diagram of an electronic hydraulic brake system in a mechanical backup brake mode in an embodiment of the utility model, wherein the direction of the arrow represents the flow direction of the power medium;

[0024] Figure 3 Schematic diagram of an electronic hydraulic brake system in a normal pressure brake mode in an embodiment of the utility model, wherein the direction of the arrow represents the flow direction of the power medium.

[0025] Reference numerals:

[0026] 10. Brake pedal; 11. Sensor; 12. Pedal push rod; 13. First pressure sensor; 14. Second pressure sensor;

[0027] 20, backup master cylinder assembly; 20a, first backup chamber; 20b, second backup chamber; 21a, first backup piston; 21b, second backup piston; 22a, first elastic component; 22b, second elastic component; 23a, first backup chamber oil outlet; 23b, second backup chamber oil outlet;

[0028] 30. Liquid storage tank;

[0029] 40, brake wheel cylinder; 40a, first wheel cylinder; 40b, second wheel cylinder; 40c, third wheel cylinder; 40d, fourth wheel cylinder;

[0030] 50. Pedal feel simulation component; 51. Simulation component valve; 52. Simulator working oil circuit;

[0031] 100, hydraulic pump; 101, liquid outlet; 112, hydraulic space; 114, piston; 1141, mounting hole; 115, sealing ring; 120, power assembly; 1201, lead screw; 130, output part; 140, housing; 141, working space;

[0032] 200, electronic hydraulic brake system; 221a, first normally open valve; 221b, second normally open valve; 221c, third normally open valve; 221d, fourth normally open valve; 222a, first pressure relief valve; 222b, second pressure relief valve; 222c, third pressure relief valve; 222d, fourth pressure relief valve; 231, second oil supply valve; 232, first oil supply valve; 233, liquid replenishment check valve; 250, first backup oil circuit; 251, first isolation valve; 252, second backup oil circuit; 253, second isolation valve; 254, first hydraulic pump oil circuit; 255, second hydraulic pump oil circuit;

[0033] 300. base; 301. avoidance space; 303. buffer gasket. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0035] The following will refer to Figure 1-Figure 3 The utility model is described in detail in conjunction with the embodiments.

[0036] Reference Figures 1 to 3 As shown, the hydraulic pump 100 according to the embodiment of the present utility model includes: a base 300 , a piston member 114 and a power assembly 120 .

[0037] The base 300 is provided with a cavity. The piston member 114 is at least partially movably provided in the cavity. The piston member 114 and the inner wall of the cavity together define a hydraulic space 112 for accommodating a power medium. The hydraulic space 112 has a liquid outlet 101. The power assembly 120 is provided on the base 300. The power assembly 120 has an output part 130. The size of at least part of the output part 130 is larger than the size of the cavity. The output part 130 is located on one side of the cavity and connected to the piston member 114 to control the piston member 114 to adjust the volume of the hydraulic space 112.

[0038] The base 300 is provided with an escape space 301 , which is provided on the side of the base 300 facing the output unit 130 . The escape space 301 is suitable for escaping the output unit 130 so that the output unit 130 can be moved into the base 300 .

[0039] In the above scheme, the piston member 114 is movably arranged in the cavity, that is, the cavity wraps the piston member 114, and the piston member 114 and the inner wall of the cavity together define the hydraulic space 112. It can be understood that moving the piston member 114 reduces the volume of the hydraulic space 112, so that the power medium in the hydraulic space 112 is pumped out from the liquid outlet 101. Among them, the output part 130 of the power component 120 is connected to the piston member 114 to drive the piston member 114 to move, and the power component 120 provides power for the movement of the piston member 114. Among them, the power medium can be hydraulic oil, or other media such as emulsion.

[0040] In the related art, the output part of the power assembly is relatively large in size. When the output part drives the piston, the base hinders the movement of the output part, resulting in a smaller movement range of the output part and shortening the stroke of the piston.

[0041] In the embodiment of the utility model, an escape space 301 is provided on the base 300. The escape space 301 is utilized to escape the output part 130, so that the output part 130 can be moved into the base 300, thereby increasing the moving range of the output part 130 and the stroke of the piston member 114, thereby increasing the discharge volume of the hydraulic pump 100, and the hydraulic pump 100 can adapt to more types of vehicles.

[0042] According to the hydraulic pump 100 of the embodiment of the utility model, an avoidance space 301 is provided on the base 300, and the avoidance space 301 is used to avoid the output part 130, so that the output part 130 can be moved into the base 300, thereby increasing the moving range of the output part 130, increasing the stroke of the piston member 114, thereby increasing the discharge volume of the hydraulic pump 100, and the hydraulic pump 100 can adapt to more types of vehicles.

[0043] Reference Figure 1 As shown, in some embodiments, a mounting hole 1141 is provided at one end of the piston member 114 away from the cavity, and a portion of the output portion 130 is inserted into the mounting hole 1141 and cooperates with the mounting hole 1141 to connect the output portion 130 to the piston member 114 .

[0044] In the above scheme, the output part 130 is connected to the piston member 114 through the mounting hole 1141. The mounting hole 1141 accommodates part of the output part 130, thereby hiding part of the output part 130. The part of the output part 130 that cooperates with the mounting hole 1141 can be set longer, thereby improving the connection stability.

[0045] Specifically, part of the output portion 130 may be threadedly matched with the mounting hole 1141 , and part of the output portion 130 may also be interference matched with the mounting hole 1141 .

[0046] For example, the cavity is located in front of the piston member 114, and the end of the piston member 114 away from the cavity is the rear end. The rear end of the piston member 114 is provided with a mounting hole 1141, and part of the output part 130 is screwed into the mounting hole 1141, so that the output part 130 is stably connected to the piston member 114.

[0047] In some embodiments, the power assembly 120 includes: a power component and a telescopic component.

[0048] The telescopic member is configured as an output portion 130 , and the telescopic member is telescopically disposed on the power member and telescopes under the drive of the power member to drive the piston member 114 to move.

[0049] In the above scheme, the power part provides power to the telescopic part to make the telescopic part telescope, and the telescopic part is constructed as an output part 130. The telescopic part drives the piston part 114 to move in the cavity, adjusts the volume of the hydraulic space 112, and realizes the operation of the hydraulic pump 100. The operation is simple and the reliability is high.

[0050] For example, the power assembly 120 is an electric push rod or a telescopic motor.

[0051] Reference Figure 1 As shown, in some embodiments, the power assembly 120 includes: a rotating motor, a lead screw 1201 and a nut.

[0052] The lead screw 1201 is mounted on the rotary motor and is adapted to rotate under the drive of the rotary motor. The nut is configured as the output part 130, and the nut engages with the lead screw 1201 and drives the piston member 114 to move under the drive of the lead screw 1201.

[0053] In the above scheme, the screw 1201 cooperates with the nut to convert the rotation of the rotating motor into the movement of the nut. The nut is constructed as the output part 130. The nut drives the piston 114 to move. The overall movement is smooth. The cooperation of the screw 1201 and the nut improves the energy utilization rate.

[0054] Reference Figure 1 As shown, in some embodiments, the hydraulic pump 100 further includes: a housing 140, the housing 140 and the base 300 together define a working space 141, the screw 1201 is rotatably disposed in the housing 140, and the nut is located in the working space 141; wherein a buffer gasket 303 is provided between the housing 140 and the nut.

[0055] In the above scheme, the shell 140 and the base 300 jointly define a working space 141. The nut is located in the working space 141. The working space 141 provides certain protection for the nut to prevent the nut's work from being disturbed. The screw 1201 is rotatably mounted on the shell 140. The shell 140 provides support for the screw 1201. At the same time, a buffer gasket 303 is arranged between the shell 140 and the nut. The buffer gasket 303 is used to buffer the collision between the shell 140 and the nut, thereby improving the noise problem.

[0056] Specifically, the buffer gasket 303 can be installed on the housing 140, or the buffer gasket 303 can also be installed on the nut to provide a buffer between the housing 140 and the nut.

[0057] Reference Figure 1 As shown, in some embodiments, the buffer gasket 303 is installed on the side wall of the housing 140 facing the nut.

[0058] In the above scheme, the buffer gasket 303 is installed on the side wall of the shell 140 facing the nut, the screw 1201 is installed on the shell 140, and the screw 1201 drives the nut to move. In the embodiment of the utility model, the buffer gasket 303 is installed on the side wall of the shell 140 facing the nut. The shell 140 has a larger surface area, and the installation of the buffer gasket 303 is more convenient.

[0059] Specifically, a fixing groove is provided on the outer shell 140, and the buffer gasket 303 is installed in the fixing groove. By setting the fixing groove to install the buffer gasket 303, the stability of the buffer gasket 303 is improved; or, a fixing glue layer is provided on the outer shell 140, and the buffer gasket 303 is bonded to the fixing glue layer, which facilitates the installation of the buffer gasket 303.

[0060] In other embodiments, the buffer gasket 303 is installed on the side of the nut facing away from the cavity.

[0061] In the above scheme, the buffer gasket 303 is installed on the side of the nut away from the cavity, and the buffer gasket 303 is always located on the nut. When the nut moves away from the cavity, the buffer gasket 303 can better contact with the shell 140, thereby improving the reliability of operation.

[0062] Specifically, the cavity is located in front of the nut, the side of the nut facing away from the cavity is the rear side of the nut, the buffer gasket 303 is installed on the rear end face of the nut, the nut moves backward away from the cavity, and the shell 140 wraps the nut, and the buffer gasket 303 arranged on the rear end face of the nut provides a buffer between the shell 140 and the nut.

[0063] Specifically, the buffer gasket 303 includes a rubber ring and a metal frame. The rubber ring plays a buffering role, and the metal frame is used to limit the position of the rubber ring.

[0064] In some specific embodiments, a sealing ring 115 is provided between the piston 114 and the cavity to improve the sealing performance.

[0065] Reference Figure 2 , Figure 3 As shown, the electronic hydraulic brake system 200 of a vehicle according to an embodiment of the present utility model includes: a brake pedal 10, a sensor 11, a hydraulic pump 100 and a control component.

[0066] The sensor 11 is adapted to sense the action of the brake pedal 10 and send out an electrical signal. The hydraulic pump 100 is the above-mentioned hydraulic pump 100. The brake wheel cylinder 40 is connected to the fluid outlet 101, and the brake wheel cylinder 40 is used to connect the wheels of the vehicle. The control element is electrically connected to the sensor 11, and the control element is adapted to receive the electrical signal and control the hydraulic pump 100 to pump the power medium into the brake wheel cylinder 40 to brake the wheel.

[0067] The wheel brake cylinder 40 is connected to the wheel of the vehicle, and the wheel brake cylinder 40 exerts a braking effect. The sensor 11 is used to sense the action of the brake pedal 10 and send an electrical signal to the control component. When the wheel needs to be braked, the control component controls the hydraulic pump 100 to supply power medium to the wheel brake cylinder 40, so that the wheel brake cylinder 40 works to brake the wheel.

[0068] According to the electronic hydraulic brake system 200 of the vehicle in the embodiment of the utility model, by utilizing the above-mentioned hydraulic pump 100, the output part 130 is avoided by utilizing the avoidance space 301, so that the output part 130 can be moved into the base 300, thereby increasing the moving range of the output part 130, increasing the stroke of the piston member 114, and thus increasing the discharge volume of the hydraulic pump 100. The hydraulic pump 100 can adapt to a wider variety of vehicle models, and the electronic hydraulic brake system 200 can adapt to a wider variety of vehicle models.

[0069] Reference Figure 2 , Figure 3 As shown, in some embodiments, the electronic hydraulic brake system 200 also includes: a backup master cylinder assembly 20, in which a master cylinder piston and a medium space for accommodating a power medium are provided, the master cylinder piston is connected to the brake pedal 10 and is suitable for adjusting the size of the medium space, the medium space has a medium outlet, and the medium outlet is connected to the brake wheel cylinder 40 through an isolation valve.

[0070] The liquid outlet 101 is connected to the brake wheel cylinder 40 through the oil supply valve, and the isolation valve and the oil supply valve are electrically connected to the control component respectively, and the control component is suitable for controlling the brake wheel cylinder 40 to switch the connection between the liquid outlet 101 and the medium outlet.

[0071] Among them, the control component controls the brake wheel cylinder 40 to switch the connecting fluid outlet 101 and the medium outlet, that is, the hydraulic pump 100 can provide the power medium to the brake wheel cylinder 40, or the backup master cylinder assembly 20 can provide the power medium to the brake wheel cylinder 40. On the basis of the hydraulic pump 100 supplying the power medium to the brake wheel cylinder 40, the backup master cylinder assembly 20 is added to provide the power medium to the brake wheel cylinder 40. The backup master cylinder assembly 20 is mechanically connected to the brake pedal 10. When a power failure occurs, the backup master cylinder assembly 20 can normally provide the power medium to the brake wheel cylinder 40 to ensure normal braking of the wheel. The backup master cylinder assembly 20 provides braking redundancy and improves safety.

[0072] Reference Figure 2 , Figure 3 As shown, in some embodiments, the electronic hydraulic brake system 200 further includes: a pedal feel simulation member 50, the pedal feel simulation member 50 is connected to the medium space, and the pedal feel simulation member 50 is connected to the brake pedal 10 to feed back the change of the medium space to the brake pedal 10. The embodiment of the utility model further improves the operation accuracy by providing the pedal feel simulation member 50 to provide the driver with feedback force when stepping on the brake pedal 10.

[0073] In some embodiments, the vehicle's electronic hydraulic braking system 200 also includes: a pedal push rod 12 that transmits pedal force to the backup master cylinder assembly 20, a first pressure sensor 13 that detects the pressure of the power medium inside the backup master cylinder assembly 20, a second pressure sensor 14 that detects the pressure of the power medium inside the hydraulic pump 100, and a fluid storage tank 30 that stores the power medium.

[0074] In some embodiments, the wheel cylinders 40 include a first wheel cylinder 40 a , a second wheel cylinder 40 b , a third wheel cylinder 40 c , and a fourth wheel cylinder 40 d .

[0075] The backup master cylinder assembly 20 is provided with a first backup chamber 20a, in which a first backup piston 21a, a first elastic component 22a and a first backup chamber oil outlet 23a are provided, the first backup chamber oil outlet 23a is connected with the third wheel cylinder 40c and the fourth wheel cylinder 40d through a first backup oil circuit 250, and a first isolation valve 251 is provided on the first backup oil circuit 250; the backup master cylinder assembly 20 is also provided with a second backup chamber 20b, similarly, a second backup piston 21b, a second elastic component 22b and a second backup chamber oil outlet 23b are provided in the second backup chamber 20b, the second backup chamber oil outlet 23b is connected with the first wheel cylinder 40a and the second wheel cylinder 40b through a second backup oil circuit 252, and a second isolation valve 253 is provided on the second backup oil circuit 252. It can be understood that the first backup chamber 20a and the second backup chamber 20b here are the medium space mentioned above, and the first backup chamber oil outlet 23a and the second backup chamber oil outlet 23b are the medium outlet mentioned above.

[0076] In some specific embodiments, the first isolation valve 251 and the second isolation valve 253 are both set as normally open valves, so that the first backup chamber 20a is connected to the third wheel cylinder 40c and the fourth wheel cylinder 40d when the power is off, and the second backup chamber 20b is connected to the first wheel cylinder 40a and the second wheel cylinder 40b when the power is off. Such a setting ensures the braking safety of the vehicle when a power failure occurs in the system.

[0077] Among them, a first elastic component 22a and a second elastic component 22b are provided in the embodiment of the utility model. The purpose of providing the first elastic component 22a and the second elastic component 22b is that when the driver steps on the brake pedal 10, the first backup piston 21a and the second backup piston 21b move with the brake pedal 10, and the first elastic component 22a and the second elastic component 22b will also be compressed to store elastic potential energy. When the driver releases the brake pedal 10, the first backup piston 21a and the second backup piston 21b rely on the elastic potential energy stored in the elastic components to return to the original position when the driver did not step on the brake pedal 10.

[0078] In some specific embodiments, the pedal feel simulation component 50 is connected to the first backup chamber 20a through a simulator working oil circuit 52. A simulation component valve 51 is provided on the simulator working oil circuit 52, and the simulation component valve 51 is constructed as a normally closed valve. When the hydraulic pump 100 cannot provide power medium for the brake wheel cylinder 40, the power medium in the first backup chamber 20a will not flow into the pedal feel simulation component, thereby ensuring that the power medium can be fully used for braking.

[0079] In some specific embodiments, the liquid outlet 101 is connected to the first hydraulic pump oil circuit 254 and the second hydraulic pump oil circuit 255, the first hydraulic pump oil circuit 254 is provided with a first oil supply valve 232, and the second hydraulic pump oil circuit 255 is provided with a second oil supply valve 231. The embodiment of the utility model isolates the failed brake wheel cylinder 40 when a single brake wheel cylinder 40 fails among the multiple brake wheel cylinders 40 by providing the first oil supply valve 232 and the second oil supply valve 231.

[0080] In some specific embodiments, the hydraulic space 112 is connected to the fluid storage tank 30 via the fluid replenishment one-way valve 233 to replenish the power medium into the hydraulic space 112 .

[0081] Specifically, the electronic hydraulic brake system 200 has multiple braking modes, including a mechanical backup braking mode and a normal pressure braking mode.

[0082] When the hydraulic pump 100 is unable to drive the wheel cylinder 40 to work, the electronic hydraulic brake system 200 is in the mechanical backup brake mode. Figure 2As shown, the first isolation valve 251 is connected, the second isolation valve 253 is connected, the second oil supply valve 231 and the first oil supply valve 232 are closed, and the simulation valve 51 is closed. At this time, the brake pedal 10 is stepped on, the first backup piston 21a and the second backup piston 21b move left, and the brake fluid input from the reservoir 30 is output to the first backup oil circuit 250 and the second backup oil circuit 252 through the first backup chamber 20a and the second backup chamber 20b, and then enters the first normally open valve 221a, the second normally open valve 221b, the third normally open valve 221c, and the fourth normally open valve 221d through the first isolation valve 251 and the second isolation valve 253 and enters the first wheel cylinder 40a, the second wheel cylinder 40b, the third wheel cylinder 40c, and the fourth wheel cylinder 40d, thereby achieving braking. When the driver releases the brake pedal 10, the power medium returns to the cavity of the backup master cylinder assembly 20 along the original path.

[0083] Reference Figure 3 As shown, the electronic hydraulic brake system 200 is in the normal pressure brake mode. When the driver steps on the brake pedal 10, the simulation valve 51 is powered on and is in the open state, the first isolation valve 251 and the second isolation valve 253 are powered on and are in the closed state, and the second oil supply valve 231 and the first oil supply valve 232 are powered on and are in the open state. At this time, the power medium in the first backup chamber 20a enters the pedal feel simulation component 50 through the simulator working oil circuit 52 and the simulation valve 51. Because the first isolation valve 251 is in a closed state, the power medium will all flow into the pedal feel simulation component 50. The load inside the pedal feel simulation component 50 is transmitted to the first backup piston 21a and the pedal push rod 12 through the power medium, and then transmitted to the brake pedal 10 and then to the driver's foot. After the driver steps on the brake pedal 10, the displacement generated by the pedal push rod 12 will pass through the sensor 11, which is constructed as a pedal displacement sensor, and the generated electrical signal will be transmitted to the control component, which is an ECU (electronic control unit). The ECU sends a command to the power assembly 120, which includes a rotating motor, which is a servo motor. The servo motor will perform positive rotation according to the command, and the piston 114 will move left. At this time, the power medium in the hydraulic space 112 will pass through the liquid outlet 101, pass through the second oil supply valve 231, the first oil supply valve 232, and then pass through the first normally open valve 221a, the second normally open valve 221b, the third normally open valve 221c, and the fourth normally open valve 221d and enter the first wheel cylinder 40a, the second wheel cylinder 40b, the third wheel cylinder 40c, and the fourth wheel cylinder 40d, thereby realizing power-assisted braking. When the driver releases the brake pedal 10, the servo motor receives the signal from the ECU and rotates in the opposite direction, and the power medium returns to the original path.

[0084] Among them, a first pressure relief valve 222a is provided between the first normally open valve 221a and the first wheel cylinder 40a, a second pressure relief valve 222b is provided between the second normally open valve 221b and the second wheel cylinder 40b, a third pressure relief valve 222c is provided between the third normally open valve 221c and the third wheel cylinder 40c, and a fourth pressure relief valve 222d is provided between the fourth normally open valve 221d and the fourth wheel cylinder 40d. The pressure relief ports of the first pressure relief valve 222a, the second pressure relief valve 222b, the third pressure relief valve 222c and the first pressure relief valve 222d are connected to the liquid storage tank 30.

[0085] The embodiment of the utility model can meet a larger pressure building capacity by arranging 13 solenoid valves or even fewer solenoid valves. Compared with the products on the market, the oil circuit layout is simpler, the software control is more concise and effective, the overall size is reduced, the safety is improved, and the cost is lower.

[0086] The vehicle according to the embodiment of the present utility model includes the above-mentioned electronic hydraulic brake system 200 .

[0087] According to the vehicle of the embodiment of the utility model, by using the above-mentioned electronic hydraulic brake system 200, the embodiment of the utility model can meet a larger pressure building capacity by arranging 13 solenoid valves or even fewer solenoid valves, and can output a relatively large displacement volume. Compared with the products on the market, the oil circuit layout is simpler, the software control is more concise and effective, the overall size is reduced, the safety is improved, and the cost is lower.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic pump (100), characterized in that: include: A base (300), wherein the base (300) is provided with a cavity; a piston member (114), the piston member (114) being at least partially movably disposed in the cavity, the piston member (114) and an inner wall of the cavity jointly defining a hydraulic space (112) for accommodating a power medium, the hydraulic space (112) having a liquid outlet (101); A power assembly (120), the power assembly (120) being disposed on the base (300), the power assembly (120) having an output portion (130), at least a portion of the output portion (130) having a size larger than a size of the cavity, the output portion (130) being located at one side of the cavity and connected to the piston member (114) to control the piston member (114) to adjust the volume of the hydraulic space (112); wherein, The base (300) is provided with an escape space (301), which is provided on the side of the base (300) facing the output portion (130), and the escape space (301) is suitable for escaping the output portion (130) so that the output portion (130) moves into the base (300).

2. The hydraulic pump (100) according to claim 1, characterized in that: A mounting hole (1141) is provided at one end of the piston member (114) facing away from the cavity, and a portion of the output portion (130) is inserted into the mounting hole (1141) and cooperates with the mounting hole (1141) so that the output portion (130) is connected to the piston member (114).

3. The hydraulic pump (100) according to claim 1, characterized in that: The power assembly (120) comprises: Power parts; A telescopic member, the telescopic member being configured as the output portion (130), the telescopic member being telescopically arranged on the power member and telescopically driven by the power member to drive the piston member (114) to move.

4. The hydraulic pump (100) according to claim 1, characterized in that: The power assembly (120) comprises: Rotating electrical machines; A lead screw (1201), the lead screw (1201) being mounted on the rotating motor and being adapted to rotate under the drive of the rotating motor; A nut (1202), wherein the nut (1202) is configured as the output portion (130), and the nut (1202) engages with the lead screw (1201) and drives the piston member (114) to move under the drive of the lead screw (1201).

5. The hydraulic pump (100) according to claim 4, characterized in that: Also includes: A housing (140), wherein the housing (140) and the base (300) together define a working space (141), the lead screw (1201) is rotatably disposed on the housing (140), and the nut (1202) is located in the working space (141); wherein, A buffer gasket (303) is provided between the housing (140) and the nut (1202).

6. The hydraulic pump (100) according to claim 5, characterized in that: The buffer gasket (303) is installed on the side wall of the housing (140) facing the nut (1202); alternatively, the buffer gasket (303) is installed on the side of the nut (1202) facing away from the cavity.

7. An electronic hydraulic brake system (200), characterized in that: include: Brake pedal (10); A sensor (11), wherein the sensor (11) is adapted to sense the movement of the brake pedal (10) and emit an electrical signal; A hydraulic pump (100), wherein the hydraulic pump (100) is the hydraulic pump (100) according to any one of claims 1 to 6; A brake wheel cylinder (40), the brake wheel cylinder (40) being connected to the fluid outlet (101), and the brake wheel cylinder (40) being used to connect to a wheel of a vehicle; A control component is electrically connected to the sensor (11), and is suitable for receiving the electrical signal and controlling the hydraulic pump (100) to pump the power medium into the brake wheel cylinder (40) to brake the wheel.

8. The electronic hydraulic brake system (200) according to claim 7, characterized in that: Also includes: A backup master cylinder assembly (20), wherein a master cylinder piston and a medium space for accommodating the power medium are provided in the backup master cylinder assembly (20), the master cylinder piston is connected to the brake pedal (10) and is suitable for adjusting the size of the medium space, the medium space has a medium outlet, and the medium outlet is connected to the brake wheel cylinder (40) through an isolation valve; wherein, The liquid outlet (101) is connected to the brake wheel cylinder (40) via an oil supply valve, and the isolation valve and the oil supply valve are electrically connected to the control element respectively, and the control element is suitable for controlling the brake wheel cylinder (40) to switch the connection between the liquid outlet (101) and the medium outlet.

9. The electronic hydraulic brake system (200) according to claim 8, characterized in that: Also includes: A pedal feel simulation member (50) is connected to the medium space, and the pedal feel simulation member (50) is connected to the brake pedal (10) to feed back changes in the medium space to the brake pedal (10).

10. A vehicle, characterized in that: An electronic hydraulic brake system (200) comprising any one of claims 7 to 9.

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