CN217415724U - Braking system and vehicle - Google Patents
Braking system and vehicle Download PDFInfo
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- CN217415724U CN217415724U CN202221373616.XU CN202221373616U CN217415724U CN 217415724 U CN217415724 U CN 217415724U CN 202221373616 U CN202221373616 U CN 202221373616U CN 217415724 U CN217415724 U CN 217415724U
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Abstract
The utility model discloses a braking system and vehicle, the braking system includes parking brake executor, service brake executor, parking brake valves, oil feed pipe, oil return pipe, second check valve and service brake valves, the oil inlet and the oil feed pipe of service brake valves communicate, the oil return mouth and the oil return pipe of service brake valves communicate, the working oil mouth of service brake valves communicates with the oil mouth of service brake executor, the oil inlet and the oil feed pipe of parking brake valves communicate, the oil return mouth and the oil return pipe of parking brake valves communicate, the working oil mouth of parking brake valves communicates with the oil mouth of parking brake executor, two oil mouths of parking brake executor and service brake executor communicate through the second check valve, the second check valve is used for avoiding hydraulic oil to flow to the service brake executor by the parking brake executor, when the parking brake valve set fails, the service brake valve set can be stepped to release the parking brake.
Description
Technical Field
The utility model belongs to the technical field of the vehicle, especially, relate to a braking system and vehicle.
Background
The parking brake is generally a hand brake installed on a motor vehicle, and is used for stabilizing the vehicle after the vehicle is stopped stably, so that safety accidents caused by vehicle sliding when the vehicle is stopped on a slope road surface are avoided.
The parking brake of the existing large-scale vehicle equipment such as agricultural harvesting machinery and the like is realized in a hydraulic mode, after the vehicle is started, the parking brake is released by adopting hydraulic pressure, and the vehicle is braked by adopting hydraulic pressure during service brake; when the automobile is parked, hydraulic pressure in the parking brake actuator (1) is released, and the parking brake actuator (1) stabilizes the automobile in place under the action of the spring.
When the vehicle fails, hydraulic pressure cannot be established and the parking brake cannot be released, at which time the vehicle cannot be moved to a safe zone.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an object of the present invention is to provide a brake system that has a simple structure and can be automatically released from parking braking by hydraulic oil when a service brake pedal is treaded.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a braking system comprises a parking braking actuator, a service braking actuator, a parking braking valve group, an oil supply pipe, an oil return pipe, a second check valve and a service braking valve group, wherein the service braking valve group is provided with an oil inlet, an oil return port and a working oil port, the oil inlet of the service braking valve group is communicated with the oil supply pipe, the oil return port of the service braking valve group is communicated with the oil return pipe, the working oil port of the service braking valve group is communicated with the oil port of the service braking actuator, the parking braking valve group is provided with an oil inlet, an oil return port and a working oil port, the oil inlet of the parking braking valve group is communicated with the oil supply pipe, the oil return port of the parking braking valve group is communicated with the oil return pipe, the working oil port of the parking braking valve group is communicated with the oil port of the parking braking actuator, and the two oil ports of the service braking actuator are communicated through the second check valve, the second check valve is used for preventing hydraulic oil from flowing from the parking brake actuator to the service brake actuator.
The beneficial effects of the above technical scheme are that: so make the vehicle after the start, parking braking can be relieved in coordination through parking braking relief switching-over valve and parking braking switching-over valve under the normal condition, and there is the trouble and lead to the vehicle to start the back parking braking valves in the parking braking valves and can't realize relieving the parking braking, can trample service brake pedal this moment (when trampling once and be not enough to relieve the parking braking, can trample service brake pedal many times in succession), the hydraulic oil of service brake valves work oil port department flows to the hydraulic fluid port of parking braking executor and makes the spring in its of the compression of parking braking executor relieve the parking braking at this moment.
In the above technical scheme, the service brake valve bank comprises a first check valve, a service brake reversing valve and a brake booster pump, the service brake reversing valve comprises an oil inlet, an oil return port and a working oil port, the brake booster pump comprises a small cavity oil port and a large cavity oil port, the oil inlet of the service brake reversing valve forms the oil inlet of the service brake valve bank, the working oil port of the service brake reversing valve forms the working oil port of the service brake valve bank, the large cavity oil port of the brake booster pump is communicated with the working oil port of the service brake reversing valve, the oil return port of the service brake reversing valve is communicated with the small cavity oil port of the brake booster pump and forms the oil return port of the service brake valve bank, the large cavity oil port of the brake booster pump is communicated with the small cavity oil port of the brake booster pump through the first check valve, and the first check valve is used for preventing hydraulic oil from passing through the large cavity oil port of the brake booster pump to the small cavity oil port of the brake booster pump The cavity oil port flows.
The beneficial effects of the above technical scheme are that: therefore, when a service brake pedal is trampled at each time, hydraulic oil in the large cavity of the brake booster pump flows into the service brake actuator and the parking brake actuator.
In the technical scheme, two large cavity oil ports of the brake booster pump are arranged, one large cavity oil port of the brake booster pump is communicated with a working oil port of the service brake reversing valve, and the other large cavity oil port of the brake booster pump is communicated with a small cavity oil port of the brake booster pump through the first check valve.
The beneficial effects of the above technical scheme are that: therefore, the brake booster pump is more convenient to connect through a pipeline.
In the technical scheme, a third one-way valve is further arranged at an oil inlet of the service brake reversing valve and used for preventing hydraulic oil at the oil inlet of the service brake reversing valve from flowing back to the oil supply pipe.
The beneficial effects of the above technical scheme are that: therefore, the working oil port of the service brake reversing valve can always keep certain back pressure.
In the technical scheme, the parking brake valve group comprises a parking brake reversing valve and a parking brake release reversing valve, the parking brake reversing valve is provided with an oil inlet, an oil return port and a working oil port, the parking brake release reversing valve is provided with a first oil port and a second oil port, the oil inlet and the oil return port of the parking brake reversing valve respectively form the oil inlet and the oil return port of the parking brake valve group, the first oil port of the parking brake release reversing valve is communicated with the working oil port of the parking brake reversing valve, and the second oil port of the parking brake release reversing valve forms the working oil port of the parking brake valve group.
The beneficial effects of the above technical scheme are that: therefore, when parking braking is performed, the parking braking reversing valve and the parking braking releasing reversing valve are both in a power-off state, hydraulic oil in the parking braking actuator flows back to the oil return pipe through the parking braking reversing valve and the parking braking releasing reversing valve at the moment, parking braking is performed by the parking braking actuator under the action of a spring in the parking braking actuator, when parking braking is released, the parking braking reversing valve and the parking braking releasing reversing valve are both in a power-on state, and hydraulic oil in the oil supply pipe flows into the parking braking actuator through the parking braking reversing valve and the parking braking releasing reversing valve, so that the parking braking actuator releases parking braking.
The parking brake system further comprises a pressure switch, wherein the pressure switch is arranged at an oil port of the parking brake actuator and is used for being electrically connected with an ECU (electronic control unit) of a vehicle.
The beneficial effects of the above technical scheme are that: in this way, after the parking brake actuator releases the parking brake, a signal can be sent to the vehicle ECU through the pressure switch to inform the driver of the release of the parking brake.
Still include brake oil pump and brake oil tank among the above-mentioned technical scheme, the oil inlet of brake oil pump with brake oil tank intercommunication, the oil-out of brake oil pump with supply oil pipe intercommunication, return oil pipe with communicate in the brake oil tank.
The beneficial effects of the above technical scheme are that: the structure is simple.
In the technical scheme, the oil supply pipe is also provided with a first oil filter.
The beneficial effects of the above technical scheme are that: therefore, dregs in the brake oil tank can be prevented from entering the brake system.
In the technical scheme, the oil return pipe is also provided with a second oil filter.
The beneficial effects of the above technical scheme are that: therefore, the dregs in the braking posture can be prevented from entering the braking oil tank.
A second object of the present invention is to provide a vehicle with a simple structure and capable of releasing the parking brake when the service brake pedal is trampled.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a vehicle comprising a braking system as described above.
The beneficial effects of the above technical scheme are that: therefore, when the parking brake valve bank of the vehicle breaks down, parking brake release can still be realized.
Drawings
FIG. 1 is a schematic structural diagram of a braking system according to an embodiment of the present invention;
FIG. 2 is another schematic view of a brake system according to an embodiment of the present invention;
fig. 3 is an electrical connection diagram of the pressure switch, the ECU and the display screen according to the embodiment of the present invention.
In the figure: the parking brake system comprises a parking brake actuator 1, a pressure switch 11, a service brake actuator 2, a parking brake valve group 3, a parking brake reversing valve 31, a parking brake release reversing valve 32, an oil supply pipe 4, a first oil filter 41, an oil return pipe 5, a second oil filter 51, a second one-way valve 6, a service brake valve group 7, a first one-way valve 71, a service brake reversing valve 72, a brake booster pump 73, a third one-way valve 8, a brake oil pump 91 and a brake oil tank 92.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "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 shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
As shown in fig. 1, this embodiment provides a braking system, which includes a parking brake actuator 1, a service brake actuator 2, a parking brake valve set 3, an oil supply pipe 4, an oil return pipe 5, a second check valve 6, and a service brake valve set 7, where the service brake valve set 7 has an oil inlet, an oil return port, and a working oil port, the oil inlet of the service brake valve set 7 is communicated with the oil supply pipe 4, the oil return port of the service brake valve set 7 is communicated with the oil return pipe 5, the working oil port of the service brake valve set 7 is communicated with the oil port of the service brake actuator 2, the parking brake valve set 3 has an oil inlet, an oil return port, and a working oil port, the oil inlet of the parking brake valve set 3 is communicated with the oil supply pipe 4, the oil return port of the parking brake valve set 3 is communicated with the oil return pipe 5, and the working oil port of the parking brake valve set 3 is communicated with the parking brake actuator 1, the two oil ports of the parking brake actuator 1 and the service brake actuator 2 are communicated through the second one-way valve 6, the second check valve 6 is used to prevent the hydraulic oil from flowing from the parking brake actuator 1 to the service brake actuator 2, therefore, after the vehicle is started, the parking brake can be released through the cooperation of the parking brake releasing reversing valve and the parking brake reversing valve under the normal condition, when the parking brake valve bank fails to release the parking brake after the vehicle is started due to the fault of the parking brake valve bank, at the moment, a service brake pedal can be stepped (when the parking brake is not released once, the service brake pedal can be continuously stepped for multiple times), and at the moment, hydraulic oil at a working oil port of the service brake valve group flows to an oil port of the parking brake actuator through the second check valve, so that the parking brake actuator compresses a spring in the parking brake actuator to release the parking brake.
In the above technical solution, the service brake valve bank 7 includes a first check valve 71, a service brake directional control valve 72 and a brake booster pump 73, the service brake directional control valve 72 includes an oil inlet, an oil return port and a working oil port, the brake booster pump 73 includes a small cavity oil port and a large cavity oil port, the oil inlet of the service brake directional control valve 72 forms the oil inlet of the service brake valve bank 7, the working oil port of the service brake directional control valve 72 forms the working oil port of the service brake valve bank 7, the large cavity oil port of the brake booster pump 73 is communicated with the working oil port of the service brake directional control valve 72, the oil return port of the service brake directional control valve 72 is communicated with the small cavity oil port of the brake booster pump 73 to form the oil return port of the service brake valve bank 7, the large cavity oil port of the brake booster pump 73 is communicated with the small cavity oil port of the brake booster pump 73 through the first check valve 71, the first check valve 71 is used for preventing hydraulic oil from flowing to a small cavity oil port of the brake booster pump 73 through a large cavity oil port of the brake booster pump 73, so that when a service brake pedal is stepped on each time, the hydraulic oil in the large cavity of the brake booster pump flows into a service brake actuator and a parking brake actuator.
In the technical scheme, two large cavity oil ports of the brake booster pump 73 are arranged, one large cavity oil port of the brake booster pump 73 is communicated with a working oil port of the service brake reversing valve 72, and the other large cavity oil port of the brake booster pump 73 is communicated with a small cavity oil port of the brake booster pump 73 through the first check valve 71, so that the brake booster pump is more convenient to connect in a pipeline manner.
In the above technical scheme, the third check valve 8 is further disposed at the oil inlet of the service brake reversing valve 72, and the third check valve 8 is used for preventing the hydraulic oil at the oil inlet of the service brake reversing valve 72 from flowing back to the oil supply pipe 4, so that the working oil port of the service brake reversing valve can always maintain a certain back pressure.
In the above technical scheme, the parking brake valve group 3 comprises a parking brake reversing valve 31 and a parking brake releasing reversing valve 32, the parking brake reversing valve 31 has an oil inlet, an oil return port and a working oil port, the parking brake releasing reversing valve 32 has a first oil port and a second oil port, the oil inlet and the oil return port of the parking brake reversing valve 31 respectively form the oil inlet and the oil return port of the parking brake valve group 3, the first oil port of the parking brake releasing reversing valve 32 is communicated with the working oil port of the parking brake reversing valve 31, the second oil port of the parking brake releasing reversing valve 32 forms the working oil port of the parking brake valve group 3, so that during parking brake, the parking brake reversing valve and the parking brake releasing reversing valve are both in a power-off state, and hydraulic oil in a parking brake actuator flows back to the oil return pipe through the parking brake reversing valve and the parking brake releasing reversing valve, and the parking brake actuator acts parking brake by a spring in the parking brake actuator, when the parking brake is released, the parking brake reversing valve and the parking brake releasing reversing valve are both in an electrified state, and hydraulic oil in the oil supply pipe flows into the parking brake actuator through the parking brake reversing valve and the parking brake releasing reversing valve, so that the parking brake actuator releases the parking brake.
As shown in fig. 3, the above technical solution further includes a pressure switch 11, the pressure switch 11 is disposed at an oil port of the parking brake actuator 1, and the pressure switch 11 is configured to be electrically connected to an ECU of the vehicle, so that after the parking brake actuator releases the parking brake, the pressure switch sends a signal to the ECU of the vehicle, and the ECU displays the signal of releasing the parking brake through a display screen of a cockpit to inform a driver of the release of the parking brake.
As shown in fig. 2, the brake oil pump system further comprises a brake oil pump 91 and a brake oil tank 92 in the above technical scheme, an oil inlet of the brake oil pump 91 is communicated with the brake oil tank 92, an oil outlet of the brake oil pump 91 is communicated with the oil supply pipe 4, the oil return pipe 5 is communicated with the interior of the brake oil tank 92, and the brake oil pump system is simple in structure.
In the above technical scheme, the oil supply pipe 4 is further provided with a first oil filter 41, so that dregs in a brake oil tank can be prevented from entering a brake system.
In the above technical solution, the oil return pipe 5 is further provided with a second oil filter 51, so that dregs in a braking posture can be prevented from entering a braking oil tank.
Example 2
The embodiment provides a vehicle comprising the brake system according to embodiment 1, so that the vehicle still can realize parking brake release when the parking brake valve bank fails. Wherein the vehicle may be a loader or a harvester.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A braking system is characterized by comprising a parking braking actuator (1), a service braking actuator (2), a parking braking valve group (3), an oil supply pipe (4), an oil return pipe (5), a second check valve (6) and a service braking valve group (7), wherein the service braking valve group (7) is provided with an oil inlet, an oil return port and a working oil port, the oil inlet of the service braking valve group (7) is communicated with the oil supply pipe (4), the oil return port of the service braking valve group (7) is communicated with the oil return pipe (5), the working oil port of the service braking valve group (7) is communicated with the oil port of the service braking actuator (2), the parking braking valve group (3) is provided with an oil inlet, an oil return port and a working oil port, the oil inlet of the parking braking valve group (3) is communicated with the oil supply pipe (4), and the oil return port of the parking braking valve group (3) is communicated with the oil return pipe (5), the hydraulic fluid port of parking braking valves (3) with the hydraulic fluid port intercommunication of parking braking executor (1), two hydraulic fluid ports of parking braking executor (1) and service braking executor (2) pass through second check valve (6) intercommunication, second check valve (6) are used for avoiding hydraulic oil by parking braking executor (1) to service braking executor (2) flow.
2. The brake system according to claim 1, wherein the service brake valve group (7) comprises a first check valve (71), a service brake reversing valve (72) and a brake booster pump (73), the service brake reversing valve (72) comprises an oil inlet, an oil return port and a working oil port, the brake booster pump (73) comprises a small cavity oil port and a large cavity oil port, the oil inlet of the service brake reversing valve (72) forms the oil inlet of the service brake valve group (7), the working oil port of the service brake reversing valve (72) forms the working oil port of the service brake valve group (7), the large cavity oil port of the brake booster pump (73) is communicated with the working oil port of the service brake reversing valve (72), the oil return port of the service brake reversing valve (72) is communicated with the small cavity of the brake booster pump (73) and forms the oil return port of the service brake valve group (7), the large cavity oil port of the brake booster pump (73) is communicated with the small cavity oil port of the brake booster pump (73) through the first check valve (71), and the first check valve (71) is used for preventing hydraulic oil from flowing to the small cavity oil port of the brake booster pump (73) through the large cavity oil port of the brake booster pump (73).
3. The brake system according to claim 2, wherein two large cavity oil ports of the brake booster pump (73) are provided, one large cavity oil port of the brake booster pump (73) is communicated with a working oil port of the service brake reversing valve (72), and the other large cavity oil port of the brake booster pump (73) is communicated with a small cavity oil port of the brake booster pump (73) through a first one-way valve (71).
4. The brake system according to claim 2, characterized in that a third check valve (8) is further arranged at the oil inlet of the service brake reversing valve (72), and the third check valve (8) is used for preventing the hydraulic oil at the oil inlet of the service brake reversing valve (72) from flowing back to the oil supply pipe (4).
5. The brake system according to any one of claims 1 to 4, wherein the parking brake valve set (3) comprises a parking brake reversing valve (31) and a parking brake releasing reversing valve (32), the parking brake reversing valve (31) has an oil inlet, an oil return port and a working oil port, the parking brake releasing reversing valve (32) has a first oil port and a second oil port, the oil inlet and the oil return port of the parking brake reversing valve (31) respectively form the oil inlet and the oil return port of the parking brake valve set (3), the first oil port of the parking brake releasing reversing valve (32) is communicated with the working oil port of the parking brake reversing valve (31), and the second oil port of the parking brake releasing reversing valve (32) forms the working oil port of the parking brake valve set (3).
6. A brake system according to claim 5, further comprising a pressure switch (11), the pressure switch (11) being provided at a fuel port of the parking brake actuator (1), the pressure switch (11) being adapted to be electrically connected to an ECU of a vehicle.
7. The braking system according to claim 5, characterized by further comprising a brake oil pump (91) and a brake oil tank (92), wherein an oil inlet of the brake oil pump (91) is communicated with the brake oil tank (92), an oil outlet of the brake oil pump (91) is communicated with the oil supply pipe (4), and the oil return pipe (5) is communicated with the interior of the brake oil tank (92).
8. A braking system according to claim 5, characterised in that a first oil filter (41) is also provided in the supply line (4).
9. A braking system according to claim 5, characterized in that a second oil filter (51) is also provided on the return line (5).
10. A vehicle comprising a braking system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221373616.XU CN217415724U (en) | 2022-06-02 | 2022-06-02 | Braking system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221373616.XU CN217415724U (en) | 2022-06-02 | 2022-06-02 | Braking system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217415724U true CN217415724U (en) | 2022-09-13 |
Family
ID=83170958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221373616.XU Active CN217415724U (en) | 2022-06-02 | 2022-06-02 | Braking system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217415724U (en) |
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2022
- 2022-06-02 CN CN202221373616.XU patent/CN217415724U/en active Active
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Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |