Brake assembly and brake valve group thereof

Abstract

The utility model discloses a brake assembly and a brake valve set thereof. The brake valve set comprises a main valve body, a first control valve and a second control valve. The brake valve set has a pressure storage state and a pressure relief state, when the brake valve set is in the pressure storage state, the first control valve and the second control valve are both in the closed state, and when the brake assembly enters the pressure relief state, the first control valve and the second control valve are both in the open state. An oil inlet, an oil inlet flow channel, an oil outlet flow channel and an oil return flow channel are formed in the main valve body, the oil inlet formed in the main valve body is connected with an oil source, and the energy accumulator is installed on the main valve body and communicated with the oil outlet flow channel. The first control valve is provided with a first oil injection port, a first oil return port and a connecting port, the first control valve is installed on the main valve body, the first oil injection port formed by the first control valve is communicated with an oil inlet flow channel formed by the main valve body, and the first oil return port formed by the first control valve is kept communicated with an oil return flow channel formed by the main valve body. A flow path between the first oil injection port and the connecting port is communicated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic braking, in particular to a brake assembly and a brake valve group thereof. BACKGROUND

[0002] A hydraulic brake system is arranged on a vehicle to reduce the driving speed of the vehicle, wherein the hydraulic brake system comprises a brake assembly and a brake, and when braking, an accumulator arranged by the brake assembly provides power to the brake to ensure the braking effect of the brake.

[0003] “CN113898619B” discloses an accumulator liquid filling valve, which specifically comprises a pressure compensator, a cut-off valve, a check valve, an overflow valve, a pilot control assembly and a brake valve, wherein the pressure compensator is a two-position five-way valve. Since the pressure compensator has more valve ports, and the internal flow path of the pressure compensator is complex and complicated, the number of flow paths connected with the pressure compensator will also increase, which makes the later maintenance work of the accumulator liquid filling valve more difficult and inconvenient to use. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems and achieve at least one advantage of the present application, the present application provides a brake valve group, which comprises:

[0005] a main valve body, the main valve body forms an oil inlet, an oil inlet flow channel communicated with the oil inlet, an oil outlet flow channel and an oil return flow channel, wherein the main valve body forms the oil inlet connected with an oil source, an accumulator is installed on the main valve body, and the accumulator is communicated with the oil outlet flow channel;

[0006] a first control valve, the first control valve forms a first oil injection port, a first oil return port and a connecting port, the first control valve is installed on the main valve body, the first oil injection port formed by the first control valve keeps communicated with the oil inlet flow channel formed by the main valve body, and the first oil return port formed by the first control valve keeps communicated with the oil return flow channel formed by the main valve body, the flow path between the first oil injection port and the connecting port is communicated, the flow path between the first oil injection port and the first oil return port is blocked when the first control valve is in a closed state, and the flow path between the first oil injection port and the first oil return port is communicated when the first control valve is in an open state;

[0007] a second control valve, the second control valve forming a second oil inlet, a second oil return and a linkage port, the second control valve being installed in the main valve body, wherein the connection port is in communication with the second oil inlet, the second oil return is in communication with the oil return flow channel, and the linkage port remains in communication with the oil outlet flow channel, the flow path between the second oil inlet and the second oil return is blocked when the second control valve is in the closed state, and the flow path between the second oil inlet and the second oil return is communicated when the second control valve is in the open state;

[0008] The brake valve group has a pressure accumulation state and a pressure release state: when the brake valve group is in the pressure accumulation state, the first control valve and the second control valve are both in the closed state, oil enters the oil inlet flow channel from the oil inlet, part of the oil flows to the connection port through the first oil inlet and is retained between the flow path of the connection port and the second oil inlet; the rest of the oil flows from the oil outlet flow channel to the energy accumulator; when the brake valve group enters the pressure release state, the flow path between the second oil inlet and the second oil return is communicated, the oil retained between the flow path of the connection port and the second oil inlet enters the second control valve and flows from the second oil return to the oil return flow channel, and the first control valve switches to the open state, oil flows from the oil inlet flow channel to the oil return flow channel from the first oil inlet through the first oil return.

[0009] According to an embodiment of the present application, the brake valve group further comprises a one-way valve group, the one-way valve group comprising at least a first one-way valve, the first one-way valve being installed in the main valve body, and the first one-way valve being in communication with the oil outlet flow channel formed by the main valve body, to prevent the backflow of oil in the energy accumulator.

[0010] According to an embodiment of the present application, the brake valve group further comprises an explosion-proof valve, the explosion-proof valve being installed in the main valve body, and the explosion-proof valve being in communication with the oil outlet flow channel and the oil return flow channel, the explosion-proof valve being in the normally closed state, and the pressure in the oil outlet flow channel causing the explosion-proof valve to switch from the closed state to the open state being higher than the pressure in the oil outlet flow channel causing the second control valve to switch from the closed state to the open state, when the explosion-proof valve is in the open state, oil in the oil outlet flow channel flows to the oil return flow channel through the explosion-proof valve.

[0011] According to an embodiment of the present application, the main valve body further forms a detection port in communication with the oil inlet flow channel, the detection port being used for plugging a pressure detector, the pressure detector being used for detecting the oil pressure in the oil inlet flow channel formed by the main valve body.

[0012] According to an embodiment of the present application, the main valve body further forms an assembly port, the assembly port being used for docking a steering gear.

[0013] To solve the above technical problems and achieve at least one advantage of the present application, the present application provides a brake assembly, which comprises:

[0014] The brake valve group according to any one of the above embodiments;

[0015] At least one accumulator, which is installed on the main valve body and communicates with the oil outlet flow channel.

[0016] According to an embodiment of the present application, the brake assembly is provided with two accumulators, the one-way valve group is provided with two first one-way valves, the oil outlet flow channel comprises a main flow channel and two branch flow channels which communicate with the main flow channel, each of the accumulators communicates with one of the branch flow channels, oil flows from the oil inlet flow channel to the two accumulators through the main flow channel and the two branch flow channels, respectively, the two first one-way valves communicate with the two branch flow channels, respectively, and prevent the oil in the two accumulators from flowing back, and the explosion-proof valve communicates with the main flow channel and the oil return flow channel.

[0017] According to an embodiment of the present application, the one-way valve group further comprises a second one-way valve, which is installed on the main valve body and communicates with the main flow channel formed by the main valve body to prevent the oil in the branch flow channel from flowing back to the main flow channel.

[0018] According to an embodiment of the present application, the brake assembly further comprises a pressure relay, which is installed on the main valve body and communicates with the branch flow channel to detect the pressure of the branch flow channel and the accumulator communicating with the branch flow channel.

[0019] According to an embodiment of the present application, the brake assembly further comprises a foot brake valve, which is installed on the main valve body and communicates with the branch flow channel, a brake is controllably connected to the foot brake valve, and the accumulator supplies oil to the brake through the foot brake valve. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 A structural schematic view of the brake valve group according to the present application is shown at an angle.

[0021] Fig. 2 A structural schematic view of the brake valve group according to the present application is shown at another angle.

[0022] Fig. 3 A flow path diagram of the brake assembly according to the present application is shown. DETAILED DESCRIPTION

[0023] The following description is presented to enable any person skilled in the art to practice the application as claimed. Preferred embodiments are presented in the following description only as examples and modifications thereto can be made by those skilled in the art without departing from the spirit and scope of the application claimed. The present application is well suited to achieving this object with the features described below.

[0024] Those skilled in the art will appreciate that in the present disclosure, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships as shown in the drawings, which are presented for purposes of illustration and description only and are not intended to be limiting, and do not require that a device or element have a particular orientation or be constructed and operated in a particular orientation unless explicitly stated that it does.

[0025] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in an embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0026] Reference Figs. 1 to 3 The brake assembly according to a preferred embodiment of the present application will be described in detail below. The brake assembly is applied to a hydraulic brake system of a vehicle, and is used to supplement brake oil to a brake system of a vehicle during braking of the vehicle to achieve braking of the vehicle.

[0027] Specifically, the brake assembly comprises a brake valve group 100 and at least one accumulator 200, wherein the brake valve group 100 comprises a main valve body 10, a first control valve 20, and a second control valve 30.

[0028] The main valve body 10 forms an oil inlet 101, an oil inlet flow channel 102 communicating with the oil inlet 101, an oil outlet flow channel 103, and an oil return flow channel 104. The main valve body 10 is connected to an oil source at the oil inlet 101, and oil enters the corresponding flow channel formed in the main valve body 10 through the oil inlet 101. The accumulator 200 is installed on the main valve body 10, and the accumulator 200 communicates with the oil outlet flow channel 103.

[0029] The first control valve 20 forms a first oil inlet 201, a first oil return port 202, and a connection port 203. The first control valve 20 is installed on the main valve body 10, and the first oil inlet 201 formed by the first control valve 20 is connected to the oil inlet channel 102 formed by the main valve body 10, and the first oil return port 202 formed by the first control valve 20 is connected to the oil return channel 104 formed by the main valve body 10. The flow path between the first oil inlet 201 and the connection port 203 is connected.

[0030] When the first control valve 20 is in the closed state, the pressure on the valve core of the first control valve 20 near the connection port 203 is greater than the pressure on the side near the first oil inlet 201, thus blocking the flow path between the first oil inlet 201 and the first oil return port 202. When the pressure at the connection port 203 decreases and the pressure on the valve core of the first control valve 20 near the connection port 203 is less than the pressure on the side near the first oil inlet 201, the first control valve 20 switches to the open state, and the flow path between the first oil inlet 201 and the first oil return port 202 is connected.

[0031] The second control valve 30 forms a second oil inlet 301, a second oil return port 302, and a linkage port 303. The second control valve 30 is installed on the main valve body 10, wherein the connection port 203 communicates with the second oil inlet 301, the second oil return port 302 communicates with the oil return passage 104, and the linkage port 303 remains in communication with the oil outlet passage 103. The second control valve 30 also has a return spring 31 in a compressed state, the return spring 31 and the linkage port 303 being located on opposite sides of the valve core of the second control valve 30.

[0032] When the second control valve 30 is in the closed state, the pressure applied by the return spring 31 to the valve core of the second control valve 30 on the side away from the linkage port 303 is greater than the pressure on the side closer to the linkage port 303, thus blocking the flow path between the second oil inlet port 301 and the second oil return port 302. When the pressure at the linkage port 303 rises and the pressure on the valve core of the second control valve 30 on the side closer to the linkage port 303 is greater than the pressure on the side away from the linkage port 303, the second control valve 30 switches to the open state, and the flow path between the second oil inlet port 301 and the second oil return port 302 is connected.

[0033] The brake valve group 100 has a pressure accumulating state and a pressure releasing state. When the oil pressure in the accumulator 200 is lower than a preset range, the brake valve group 100 enters the pressure accumulating state, in which the first control valve 20 and the second control valve 30 are both in a closed state, oil flows from the oil inlet 101 to the oil inlet flow passage 102, part of the oil flows to the connecting port 203 through the first oil injection port 201 and is retained between the connecting port 203 and the flow passage connected with the second oil injection port 301; the rest of the oil flows from the oil outlet flow passage 103 to the accumulator 200 to supply oil to the accumulator 200, so that the accumulator 200 accumulates oil to supplement the brake system with oil when the vehicle brakes. As the amount of oil in the accumulator 200 increases, the oil pressure in the accumulator 200 increases, and the oil pressure in the oil outlet flow passage 103 connected with the accumulator 200 also increases, and the oil pressure at the linkage port 303 connected with the oil outlet flow passage 103 also gradually increases. When the pressure on the side of the spool of the second control valve 30 close to the linkage port 303 is greater than the pressure of the return spring 31 on the spool of the second control valve 30, the brake valve group 100 enters the pressure releasing state, the flow passage between the second oil injection port 301 and the second oil return port 302 is connected, the oil retained between the connecting port 203 and the flow passage of the second oil injection port 301 enters the second control valve 30 and flows from the second oil return port 302 to the oil return flow passage 104, causing the pressure on the side of the spool of the first control valve 20 close to the connecting port 203 to be less than the pressure on the side close to the first oil injection port 201, and the first control valve 20 switches to an open state, oil flows from the oil inlet flow passage 102 through the first oil injection port 201 from the first oil return port 202 to the oil return flow passage 104. When the amount of oil in the accumulator 200 decreases and the pressure is lower than the preset range, the brake valve group 100 reenters the pressure accumulating state.

[0034] Compared with the prior art, the first control valve 20 has fewer valve ports, and the first control valve 20 itself forms fewer oil paths, thus simplifying the oil paths of the brake valve group 100 and facilitating later maintenance and disassembly work.

[0035] As an example, the first control valve 20 is implemented as a logic valve, and the second control valve 30 is implemented as a sequence valve. Preferably, the main valve body 10 further forms a detection port 105 connected with the oil inlet flow passage 102, and the detection port 105 is plugged by a pressure detector for detecting the oil pressure in the oil inlet flow passage 102 formed by the main valve body 10.

[0036] Further, the brake valve group 100 further comprises a check valve group 40. The check valve group 40 comprises at least a first check valve 41, which is installed on the main valve body 10 and communicates with the oil outlet flow channel 103 formed by the main valve body 10, for limiting the flow of oil from the oil outlet flow channel 103 to the accumulator 200, so as to prevent the backflow of oil in the accumulator 200.

[0037] Further, the brake valve group 100 further comprises an explosion-proof valve 50.

[0038] The explosion-proof valve 50 is installed on the main valve body 10 and communicates with the oil outlet flow channel 103 and the oil return flow channel 104. The explosion-proof valve 50 is in a normally closed state, and when the pressure in the oil outlet flow channel 103 exceeds a preset value, the explosion-proof valve 50 is switched from a closed state to an open state under the action of hydraulic pressure, and the oil in the oil outlet flow channel 103 flows to the oil return flow channel 104 through the explosion-proof valve 50. It is worth mentioning that the pressure in the oil outlet flow channel 103 that causes the explosion-proof valve 50 to switch from a closed state to an open state is higher than the pressure in the main flow channel 1031 that causes the second control valve 30 to switch from a closed state to an open state.

[0039] When the first control valve 20 or / and the second control valve 30 fails, the first control valve 20 or / and the second control valve 30 cannot be switched from a closed state to an open state, at which time the pressure in the oil outlet flow channel 103 rises due to the obstruction of oil flow. When the pressure in the oil outlet flow channel 103 exceeds a preset value, the explosion-proof valve 50 is switched from a closed state to an open state under the action of hydraulic pressure, so that the oil in the oil outlet flow channel 103 flows to the oil return flow channel 104 through the explosion-proof valve 50, so as to reduce the pressure in the oil outlet flow channel 103, thereby avoiding the explosion of the brake valve group 100.

[0040] As an example, the explosion-proof valve 50 is implemented as an overflow valve.

[0041] Preferably, the brake assembly is provided with two accumulators 200, which are respectively connected with the brakes corresponding to the front and rear axles of the vehicle. When the vehicle brakes, the front and rear wheels of the vehicle are braked at the same time to achieve the purpose of stable braking.

[0042] Specifically, the oil outlet flow passage 103 comprises a main flow passage 1031 and two branch flow passages 1032 which are in communication with the main flow passage 1031. Each of the accumulators 200 is in communication with one of the branch flow passages 1032. The oil flows from the oil inlet flow passage 102 through the main flow passage 1031 and then through the two branch flow passages 1032 to the two accumulators 200, so as to supply the accumulators 200 with oil. The explosion-proof valve 50 is in communication with the main flow passage 1031 and the oil return flow passage 104. It is worth mentioning that the check valve set 40 is provided with two first check valves 41 which are in communication with the two branch flow passages 1032 respectively, so as to prevent the oil in the accumulators 200 from flowing back.

[0043] Preferably, the check valve set 40 further comprises a second check valve 42 which is mounted on the main valve body 10 and in communication with the main flow passage 1031 formed by the main valve body 10, so as to prevent the oil in the branch flow passages 1032 from flowing back to the main flow passage 1031.

[0044] Further, the main valve body 10 further forms a mounting port 106 which is used to connect a steering gear.

[0045] Further, the brake assembly further comprises a pressure relay 300.

[0046] The pressure relay 300 is mounted on the main valve body 10 and in communication with the branch flow passages 1032, so as to detect the pressure of the branch flow passages 1032 and the accumulators 200 in communication with the branch flow passages 1032. The pressure relay 300 sends corresponding signals to a vehicle controller according to the oil pressure, so that the user can know the operation of the brake assembly.

[0047] Further, the brake assembly further comprises a foot brake valve 400 which is mounted on the main valve body 10 and in communication with the branch flow passages 1032. A brake is controllably connected to the foot brake valve 400, and the accumulators 200 supply the brake with oil through the foot brake valve 400.

[0048] Those skilled in the art should understand that the embodiments of the present application described above and shown in the drawings are only examples and do not limit the present application. The advantages of the present application have been fully and effectively achieved. The functions and structural principles of the present application have been shown and described in the embodiments, and any modification or change can be made to the embodiments of the present application without departing from the principles.

Claims

1. A brake valve assembly, characterized in that, The brake valve assembly includes: The main valve body forms an oil inlet, an oil inlet channel, an oil outlet channel, and a return channel connected to the oil inlet. The oil inlet of the main valve body is connected to an oil source. An accumulator is installed on the main valve body and is connected to the oil outlet channel. A first control valve is configured to form a first oil inlet, a first oil return, and a connection port. The first control valve is installed on the main valve body, and the first oil inlet formed by the first control valve is kept in communication with the oil inlet channel formed by the main valve body, and the first oil return is kept in communication with the oil return channel formed by the main valve body. The flow path between the first oil inlet and the connection port is connected. When the first control valve is in the closed state, the flow path between the first oil inlet and the first oil return is blocked. When the first control valve is in the open state, the flow path between the first oil inlet and the first oil return is connected. The second control valve forms a second oil inlet, a second oil return, and a linkage port. The second control valve is installed on the main valve body. The linkage port is connected to the second oil inlet, the second oil return is connected to the oil return channel, and the linkage port is connected to the oil outlet channel. When the second control valve is closed, the flow path between the second oil inlet and the second oil return is blocked. When the second control valve is open, the flow path between the second oil inlet and the second oil return is connected. The brake valve assembly has a pressure-accumulating state and a pressure-relieving state: When the brake valve assembly is in the pressure-accumulating state, both the first control valve and the second control valve are closed, and oil enters the oil inlet channel from the oil inlet. Part of the oil flows through the first oil filling port to the connection port and remains between the connection port and the second oil filling port in the flow path; the remaining oil flows from the oil outlet channel to the accumulator. When the brake valve assembly enters the pressure-relieving state, the flow path between the second oil filling port and the second oil return port is connected. The oil remaining between the connection port and the second oil filling port flow path enters the second control valve and flows from the second oil return port to the return channel. The first control valve switches to the open state, and oil flows from the oil inlet channel through the first oil filling port to the return channel from the first oil return port.

2. The brake valve assembly according to claim 1, characterized in that, The brake valve assembly further includes a check valve assembly, which includes at least a first check valve. The first check valve is installed on the main valve body and communicates with the oil outlet channel formed by the first check valve and the main valve body to prevent backflow of oil in the accumulator.

3. The brake valve assembly according to claim 2, characterized in that, The brake valve assembly also includes an explosion-proof valve, which is installed on the main valve body and is connected to the oil outlet channel and the oil return channel. The explosion-proof valve is normally closed, causing the pressure in the oil outlet channel when the explosion-proof valve is switched from closed to open to be higher than the pressure in the oil outlet channel when the second control valve is switched from closed to open. When the explosion-proof valve is open, the oil in the oil outlet channel flows to the oil return channel through the explosion-proof valve.

4. The brake valve assembly according to claim 3, characterized in that, The main valve body also forms a detection port that communicates with the oil inlet channel. The detection port is for a pressure detector to be inserted into, and the pressure detector is used to detect the oil pressure in the oil inlet channel formed by the main valve body.

5. The brake valve assembly according to claim 4, characterized in that, The main valve body also forms an assembly port for docking a steering gear.

6. A braking assembly, characterized in that, The braking assembly includes: The brake valve assembly as described in any one of claims 3 to 5; At least one accumulator is installed in the main valve body and is connected to the oil outlet passage.

7. The braking assembly according to claim 6, characterized in that, The braking assembly is provided with two accumulators, the one-way valve group is provided with two first one-way valves, the oil outlet channel includes a main channel and two branch channels that are both connected to the main channel, each accumulator is connected to one of the branch channels, the oil flows from the oil inlet channel through the main channel and through the two branch channels to the two accumulators, the two first one-way valves are connected to the two branch channels respectively, and the two first one-way valves prevent the oil in the two accumulators from flowing back, and the explosion-proof valve is connected to the main channel and the return channel.

8. The braking assembly according to claim 7, characterized in that, The one-way valve assembly also includes a second one-way valve, which is installed on the main valve body and communicates with the main flow channel formed by the main valve body to prevent oil in the branch channel from flowing back into the main flow channel.

9. The braking assembly according to claim 8, characterized in that, The braking assembly also includes a pressure relay, which is mounted on the main valve body and communicates with the branch channel to detect the pressure of the branch channel and the accumulator communicated with the branch channel.

10. The braking assembly according to claim 9, characterized in that, The braking assembly also includes a foot brake valve, which is installed on the main valve body and communicates with the branch channel. The brake is controllably connected to the foot brake valve, and the accumulator supplies oil to the brake through the foot brake valve.

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