Hydraulic braking system capable of achieving high-speed forced bilateral braking and tractor

Abstract

The utility model relates to a hydraulic braking system capable of realizing high-speed forced bilateral braking and a tractor, the system comprises a pressure reducing valve, an electromagnetic valve, a control valve A and a control valve B, an interface h on the pressure reducing valve is communicated with one end of an oil return pipeline, and an interface i is communicated with one end of an oil inlet pipeline; the interface b on the control valve A can be communicated with the interface a or the interface c, and the interface e on the control valve B can be communicated with the interface d or the interface f; the interface c is communicated with the interface g through a pipeline L1, and the interface f is communicated with the pipeline L1 through a pipeline L2; an interface k on the electromagnetic valve can be communicated with an interface j or an interface m, the interface m is communicated with the oil return pipeline through a pipeline L6, and the interface j is communicated with the pipeline L1 through a pipeline L3; the connector k is communicated with the connector a through a pipeline L4, and the connector d is communicated with the pipeline L4 through a pipeline L5. The vehicle speed is associated with the braking mode through the electromagnetic valve and the sensor, and when the vehicle speed is higher than a certain limit value, double-side braking is forced, and meanwhile, the trailer is braked.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, specifically to a hydraulic braking system and tractor capable of high-speed forced bilateral braking. Background Technology

[0002] A tractor is a self-propelled power unit used to tow and drive work machinery to complete various mobile tasks. It can also be used as a power source for stationary work. It consists of an engine, transmission, running gear, steering, hydraulic suspension, power output, electrical instruments, driving controls, and traction systems or devices. Engine power is transmitted to the drive wheels through the transmission system, enabling the tractor to move. Tractors are classified by function and purpose into agricultural, industrial, and special-purpose tractors; and by structural type into wheeled, tracked, boat-shaped tractors, and self-propelled chassis tractors.

[0003] Currently, existing tractors have the following drawbacks: both single-sided and double-sided braking are achieved through mechanical structures. When the vehicle speed exceeds a certain set value, there are no mandatory double-sided protection measures, which can easily lead to dangerous accidents. Utility Model Content

[0004] This invention provides a hydraulic braking system and tractor capable of high-speed forced bilateral braking, aiming to solve the problems in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A hydraulic braking system capable of high-speed forced bilateral braking includes a pressure reducing valve, a solenoid valve, and...

[0007] Control valve A and control valve B, the pressure reducing valve is provided with interface g, interface h and interface i, interface g can be connected to interface h or interface i; interface h is connected to one end of the return oil line, and interface i is connected to one end of the inlet oil line;

[0008] The control valve A is provided with interface a, interface b, and interface c. Interface b can be connected to the interface...

[0009] The control valve B is connected to port a or port c; the control valve B is provided with port d, port e and port f, and port e can be connected to port d or port f; port c is connected to port g through pipe L1, and port f is connected to pipe L1 through pipe L2;

[0010] The solenoid valve is provided with interface j, interface k and interface m. Interface j can be connected to interface k or interface m. Interface m is connected to the return oil pipeline through pipeline L6. Interface j is connected to pipeline L1 through pipeline L3. Interface k is connected to interface a through pipeline L4. Interface d is connected to pipeline L4 through pipeline L5.

[0011] The utility model discives beneficial effects are: in the field operation process, the vehicle speed is generally lower than the set value, and the electromagnetic valve is powered on and is in the right working position at this moment, when the brake pedal is not stepped on, the pressure reducing valve, control valve A and control valve B are in the illustrated position, and the oil source pressure oil acts on P port, and the pressure reducing valve is closed. Control valve A and control valve B are in the lower working position under the action of the reset spring, and the left and right brakes are communicated with the oil tank through F1 and F2 and the electromagnetic valve, and the brakes are in the pressure release non-braking state.

[0012] When needing to brake and stepping on the brake pedal, the pressure reducing valve opens, reduces the pressure oil P to the required pressure and sends to control valve A and control valve B, and control valve A and control valve B work in the upper working position through simultaneous reversing, and the brake pressure oil is sent to the brake through F1 and F2, and the brake realizes braking under the action of the pressure oil.

[0013] When needing unilateral braking, the mechanical lock on the brake pedal is removed, and the left brake pedal is stepped on alone, and the pressure reducing valve and control valve A are reversed under the action of the left brake pedal, and the brake pressure oil P acts on the left brake through the upper working position of the pressure reducing valve and control valve A, and unilateral braking of the left side is realized. Since the right brake pedal is not stepped on, control valve B does not reverse and is still in the lower working position pressure release state, and the right brake is relieved through oil port F2, control valve B, the electromagnetic valve and oil port T, and unilateral non-braking of the right side is realized. Similarly, when the right brake pedal is stepped on alone, unilateral braking of the right side can be realized.

[0014] When the tractor is in the road transport mode, and the speed sensor monitors that the vehicle speed is higher than the set value, the electromagnetic valve loses power and reverses, and is in the left working position. When no brake pedal is stepped on, the pressure reducing valve, control valve A and control valve B are in the illustrated position, and the oil source pressure oil acts on P port, and the pressure reducing valve is closed. Control valve A and control valve B are in the lower working position under the action of the reset spring, and the left and right brakes are communicated with the oil tank through F1 and F2 and the electromagnetic valve and the pressure reducing valve, and the brakes are in the pressure release non-braking state.

[0015] When needing to brake and stepping on the brake pedal, the pressure reducing valve opens, reduces the pressure oil P to the required pressure and sends to control valve A and control valve B, and control valve A and control valve B work in the upper working position through simultaneous reversing, and the brake pressure oil is sent to the brake through F1 and F2, and the brake realizes braking under the action of the pressure oil.

[0016] If the pedal mechanical lock is forgotten to be engaged, or if the mechanical lock malfunctions, and only the left brake pedal is depressed, the pressure relief valve and control valve A will switch positions under the action of the left brake pedal. Brake pressure oil P will then act on the left brake through the upper working position of the pressure relief valve and control valve A, achieving single-sided braking on the left. Since the right brake pedal is not depressed, the pressure relief valve remains in its corresponding position. At this time, the pressure control oil after the pressure relief valve will pass through the left position of the solenoid control valve to reach control valve B, and then through the lower working position of control valve B to reach the right brake. Under pressure, the right brake and left brake will brake simultaneously. Simultaneously, the trailer will be braked via the FR port. That is, when the solenoid valve is in the left working position, whether braking with one or both pedals is applied, only simultaneous braking on both sides can be achieved, ensuring driving safety during high-speed driving.

[0017] This invention uses a solenoid valve and a sensor to link vehicle speed with braking mode. When the vehicle speed exceeds a certain limit, forced bilateral braking is applied, and trailer braking is applied simultaneously.

[0018] Based on the above technical solution, the present invention can be further improved as follows.

[0019] Furthermore, the interface b is connected to one end of the brake line L7, and the other end of the brake line L7...

[0020] One end, F1, is used to connect to the brake.

[0021] The advantages of adopting the above-mentioned further solution are that it has a simple structure and reasonable design, and uses the brake line L7 to supply oil to the brake so as to achieve braking.

[0022] Furthermore, the spring interface on one end of the control valve A is connected to the brake line L7 via a pipeline.

[0023] Connected.

[0024] The advantages of adopting the above-mentioned further solution are that the structure is simple and the above-mentioned pipeline connection is reasonable, so that the oil can enter the control valve A to adjust the position of the valve core and the spring chamber for unloading.

[0025] Furthermore, the interface e is connected to one end of the brake line L8, and the other end of the brake line L8...

[0026] One end, F2, is used to connect to the brake.

[0027] The advantages of adopting the above-mentioned further scheme are that it has a simple structure, reasonable design, and uses the brake line L8 to supply oil to the brake so as to achieve braking.

[0028] Furthermore, the spring interface on one end of the control valve B is connected to the brake line L8 via a pipeline.

[0029] communicate.

[0030] The beneficial effect of the further scheme is that the structure is simple, and the pipeline communication is reasonable, so that

[0031] The oil enters the position of the control valve core in the valve B and unloads the spring cavity.

[0032] Further, the pipeline L3 communicates with one end of a trailer brake pipeline L9, and the other end of the trailer brake pipeline

[0033] serves as a connection point FR.

[0034] The beneficial effect of the further scheme is that the structure is simple and reasonable in design, and the connection point FR on the other end of the trailer brake pipeline L9 can be connected with the trailer to provide oil for the trailer brake.

[0035] Further, the spring interface on one end of the pressure reducing valve communicates with the pipeline L1 through a pipeline L10.

[0036] The beneficial effect of the further scheme is that the structure is simple and reasonable in design, and the damping is used to transmit the

[0037] pressure to the spring cavity of the pressure reducing valve, and the brake pedal force can be adjusted according to the requirement.

[0038] Further, a throttle valve is fixedly installed on the pipeline L10.

[0039] The beneficial effect of the further scheme is that the structure is simple and reasonable in design, and the damping is used to transmit the

[0040] pressure to the spring cavity of the pressure reducing valve, and the brake pedal force can be adjusted according to the requirement.

[0041] Further, the control valve A and / or the control valve B are two-position three-way valves.

[0042] The beneficial effect of the further scheme is that the two-position three-way valves are used in the control valve A and the control valve B, which is reasonable in structure, flexible in control, various in control mode, and wide in suitable range.

[0043] The utility model also relates to a tractor, including the high-speed forced bilateral braking hydraulic brake system of realizing can as mentioned above.

[0044] The utility model also relates to a tractor, including the high-speed forced bilateral braking hydraulic brake system of realizing can as mentioned above.

[0045] The beneficial effect of the further scheme is that the utility model also provides a tractor, and the tractor is connected with the brake form by the electromagnetic valve and the sensor according to the vehicle speed, when the vehicle speed is higher than a certain limited value, forced bilateral braking is carried out, and the trailer brake is also carried out. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 It is the whole structure schematic view of the utility model;

[0047] Figure 2 It is the structure schematic view of the utility model when not braking;

[0048] Figure 3 It is the structure schematic view of the utility model when bilateral braking;

[0049] Figure 4 It is the structure schematic view of the utility model when left brake braking;

[0050] Figure 5 It is the structure schematic view of the utility model when right brake braking;

[0051] Figure 6 It is the structure schematic view of the utility model when forgetting connecting the pedal mechanical lock.

[0052] In the drawings, the component list represented by each sign is as follows:

[0053] 1, pressure reducing valve;2, control valve A;3, control valve B;4, electromagnetic valve;5, throttle valve. DETAILED DESCRIPTION

[0054] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0055] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] Example 1

[0059] like Figures 1 to 6 As shown, this embodiment provides a hydraulic braking system capable of high-speed forced bilateral braking, including a pressure reducing valve 1, a solenoid valve 4, a control valve A2, and a control valve B3. The pressure reducing valve 1 is provided with an interface g, an interface h, and an interface i. The interface g can be connected to the interface h or the interface i. The interface h is connected to one end of the return oil line, and the interface i is connected to one end of the inlet oil line.

[0060] The control valve A2 is provided with interface a, interface b, and interface c. Interface b can be connected to the interface...

[0061] The control valve B3 is connected to port a or port c; port d, port e and port f are provided on the control valve B3, and port e can be connected to port d or port f; port c is connected to port g through pipe L1, and port f is connected to pipe L1 through pipe L2;

[0062] The solenoid valve 4 is provided with interface j, interface k and interface m. Interface j can be connected to interface k or interface m. Interface m is connected to the return oil pipeline through pipeline L6. Interface j is connected to pipeline L1 through pipeline L3. Interface k is connected to interface a through pipeline L4. Interface d is connected to pipeline L4 through pipeline L5.

[0063] During field operations, the vehicle speed is generally lower than the set value. At this time, solenoid valve 4 is energized and in the right working position. When the brake pedal is not depressed, pressure reducing valve 1, control valve A2, and control valve B3 are in the positions shown in the diagram. The oil pressure acts on port P, and the pressure reducing valve is closed. Control valve A2 and control valve B3 are in the lower working position under the action of the return spring. The left and right brakes are connected to the oil tank through F1 and F2, as well as solenoid valve 4, and the brakes are in a depressurized, non-braking state.

[0064] When the brake pedal is stepped on for braking, the pressure reducing valve 1 is opened, the pressure oil P is reduced to the required pressure and delivered to the control valve A2 and the control valve B3, which are simultaneously reversed to work in the upper working position, the brake pressure oil is delivered to the brake through F1 and F2, and the brake is braked under the action of the pressure oil.

[0065] When unilateral braking is required, the mechanical lock on the brake pedal is released, and the left brake pedal is stepped on alone. Under the action of the left brake pedal, the pressure reducing valve 1 and the control valve A2 are reversed to work, the brake pressure oil P acts on the left brake through the pressure reducing valve 1 and the upper working position of the control valve A2, and unilateral braking of the left brake is realized. Since the right brake pedal is not stepped on, the control valve B3 is not reversed and is in the lower working position to release pressure, and the right brake is released through the oil port F2, the control valve B3, the electromagnetic valve 4 and the oil port T, and unilateral braking of the right brake is realized. Similarly, when the right brake pedal is stepped on alone, unilateral braking of the right brake can be realized.

[0066] When the tractor is in road transportation mode and the speed sensor detects that the vehicle speed is higher than the set value, the electromagnetic valve 4 is de-energized and reversed to the left working position. When no brake pedal is stepped on, the pressure reducing valve 1, the control valve A2 and the control valve B3 are in the positions shown in the figure, the oil source pressure oil acts on the P port, and the pressure reducing valve 1 is closed. The control valve A2 and the control valve B3 are in the lower working position under the action of the return spring, the left and right brakes are communicated with the oil tank through F1 and F2, the electromagnetic valve 4 and the pressure reducing valve 1, and the brakes are in the pressure release state without braking.

[0067] When the brake pedal is stepped on for braking, the pressure reducing valve 1 is opened, the pressure oil P is reduced to the required pressure and delivered to the control valve A2 and the control valve B3, which are simultaneously reversed to work in the upper working position, the brake pressure oil is delivered to the brake through F1 and F2, and the brake is braked under the action of the pressure oil.

[0068] If the pedal mechanical lock is forgotten to be connected or the mechanical lock fails at this time, only the left unilateral brake pedal is stepped on, the pressure reducing valve 1 and the control valve A2 are reversed to work under the action of the left brake pedal, the brake pressure oil P acts on the left brake through the pressure reducing valve 1 and the upper working position of the control valve A2, and unilateral braking of the left brake is realized. Since the right brake pedal is not stepped on, the pressure reducing valve 1 is not reversed and is in the corresponding position, the pressure control oil after the pressure reducing valve 1 reaches the control valve B3 through the left position of the electromagnetic control valve, and then reaches the right brake through the lower working position of the control valve B3, and the right brake is braked under the action of the pressure, and the trailer is braked through the FR oil port at the same time, that is, when the electromagnetic valve 4 is in the left working position, whether the unilateral pedal is stepped on for braking or the bilateral pedal is stepped on for braking, only the bilateral simultaneous braking effect can be realized, and the driving safety during high-speed driving is ensured.

[0069] Generally, the tractor has one brake for each half shaft. During high-speed driving on the road, single-side braking is not allowed to prevent safety accidents such as vehicle rollover. The left and right brake pedals are connected together through a mechanical structure, and when the brake pedal is stepped on, the left and right half shafts are simultaneously braked to realize braking. When working in the field, in order to reduce the turning radius, the mechanical lock is released to realize single-side braking. In this case, the user may forget to connect the mechanical lock after finishing work in the field, or the mechanical lock structure may be damaged and fail, causing safety hazards during road transportation. At the same time, during road transportation, a trailer is generally connected, and the trailer also needs to be braked during tractor braking to prevent safety accidents such as the trailer colliding with the tractor.

[0070] To solve the above two safety problems, the pressure reducing valve provided in the embodiment is designed. The input pressure oil P is reduced to the required braking pressure P1 according to the depth of the pedal, and the control valve A2 and the control valve B3 are two-position three-way control valves. According to the position of the pedal, the left and right half shaft braking pressure oil is controlled.

[0071] In addition, the electromagnetic valve 4 is a brake locking control electromagnetic valve. When the valve is powered and in the right working position, single-side braking can be realized. When the valve is not powered and in the initial working position, only double-side simultaneous braking can be realized. A speed sensor is arranged on the whole tractor. When the speed sensor monitors that the vehicle speed is lower than a certain set value, the electromagnetic valve is powered and changes to the right working position. When the speed is higher than the set value, the electromagnetic valve is de-energized and changes to the initial left working position.

[0072] Furthermore, in the drawing, the P port is a pressure oil supply port connected with an oil source; F1 and F2 are brake pressure output oil ports connected with brakes; the T port is a return oil port connected with an oil tank; and a trailer brake control oil port FR is also arranged. The FR is a trailer brake control signal port connected with a trailer brake valve, so as to realize tractor braking and control trailer braking at the same time.

[0073] In the embodiment, the vehicle speed is associated with the braking form through the electromagnetic valve and the sensor. When the vehicle speed is higher than a certain limit value, double-side braking is forced, and the trailer is braked at the same time.

[0074] Embodiment 2

[0075] On the basis of the embodiment 1, in the embodiment, the interface b is in communication with one end of a brake pipeline L7.

[0076] The other end F1 of the brake pipeline L7 is used to communicate with a brake.

[0077] The scheme has simple structure and reasonable design, and the brake pipeline L7 is used to provide oil to the brake, so as to realize braking.

[0078] Embodiment 3

[0079] In this embodiment, on the basis of embodiment 2, the spring interface on one end of the control valve A2 is communicated with the brake pipeline L7 through a pipeline.

[0080] The brake pipeline L7 is communicated with the brake pipeline L7 through a pipeline.

[0081] This scheme has simple structure and reasonable design, and the oil liquid is provided to the brake through the brake pipeline L8, so as to realize the brake.

[0082] Embodiment 4

[0083] In this embodiment, on the basis of the above embodiments, the pipeline L3 is communicated with one end of the trailer brake pipeline L9, and the other end of the trailer brake pipeline L9 is used as a connecting point FR.

[0084] The other end F2 of the brake pipeline L8 is used to communicate with the brake.

[0085] This scheme has simple structure and reasonable design, and the oil liquid is provided to the brake through the brake pipeline L8, so as to realize the brake.

[0086] Embodiment 5

[0087] In this embodiment, on the basis of embodiment 4, the spring interface on one end of the control valve B3 is communicated with the brake pipeline L8 through a pipeline.

[0088] The brake pipeline L8 is communicated with the brake pipeline L8 through a pipeline.

[0089] This scheme has simple structure and reasonable design, and the oil liquid is provided to the brake through the brake pipeline L8, so as to realize the brake.

[0090] Embodiment 6

[0091] In this embodiment, on the basis of the above embodiments, the pipeline L3 is communicated with one end of the trailer brake pipeline L9, and the other end of the trailer brake pipeline L9 is used as a connecting point FR.

[0092] The other end F2 of the brake pipeline L8 is used to communicate with the brake.

[0093] This scheme has simple structure and reasonable design, and the oil liquid is provided to the brake through the brake pipeline L8, so as to realize the brake.

[0094] FR can be connected to the trailer to provide oil liquid for the trailer brake.

[0095] Embodiment 7

[0096] In this embodiment, on the basis of the above embodiments, the spring interface on one end of the control valve B3 is communicated with the brake pipeline L8 through a pipeline.

[0097] The pipeline L10 is communicated with the pipeline L1 through a pipeline L10.

[0098] The scheme has simple structure and reasonable design, and the output pressure is fed back to the spring cavity of the pressure reducing valve through damping, and the brake pedal force can be adjusted according to requirements.

[0099] Embodiment 8

[0100] In the embodiment, a throttle valve 5 is fixedly installed on the pipeline L10.

[0101] The scheme has simple structure and reasonable design, and the output pressure is fed back to the spring cavity of the pressure reducing valve through damping, and the brake pedal force can be adjusted according to requirements.

[0102] Embodiment 9

[0103] In the embodiment, the control valve A2 and / or the control

[0104] The valve B3 is a two-position three-way valve.

[0105] The control valve A2 and the control valve B3 are reasonably two-position three-way valves, and have simple structure and control

[0106] The control valve A2 and the control valve B3 are reasonably two-position three-way valves, and have simple structure and control

[0107] Embodiment 10

[0108] In the embodiment, the control valve A2 and / or the control

[0109] The hydraulic brake system capable of realizing high-speed forced bilateral braking.

[0110] The tractor is provided in the embodiment, and the vehicle speed is associated with the braking mode through the electromagnetic valve and the sensor, and when the vehicle speed is higher than a certain limited value, forced bilateral braking is realized, and the trailer brake is also realized.

[0111] The working principle of the utility model is as follows:

[0112] In the field operation process, the vehicle speed is generally lower than the set value, at this time, the electromagnetic valve 4 is electrified and is in the right working position; when the brake pedal is not stepped on, the pressure reducing valve 1, the control valve A2 and the control valve B3 are in the illustrated position, the oil source pressure oil acts on the P port, and the pressure reducing valve is closed. The control valve A2 and the control valve B3 are in the lower working position under the action of the reset spring, the left and right brakes are communicated with the oil tank through F1 and F2 and the electromagnetic valve 4, and the brakes are in the pressure release and non-braking state (see Figure 2 ).

[0113] When the brake pedal is stepped on for braking, the pressure reducing valve 1 opens, the pressure oil P is reduced to the required pressure and delivered to the control valve A2 and the control valve B3, which are simultaneously reversed to work in the upper working position, the brake pressure oil is delivered to the brake through F1 and F2, and the brake is braked under the action of the pressure oil (see Figure 3 ).

[0114] When unilateral braking is required, the mechanical lock on the brake pedal is released, and the left brake pedal is stepped on alone. Under the action of the left brake pedal, the pressure reducing valve 1 and the control valve A2 are reversed to work, the brake pressure oil P acts on the left brake through the pressure reducing valve 1 and the upper working position of the control valve A2, and unilateral braking of the left side is realized. Since the right brake pedal is not stepped on, the control valve B3 is not reversed and is in the lower working position, the right brake is relieved through the oil port F2, the control valve B3, the electromagnetic valve 4 and the oil port T, and unilateral braking of the right side is realized. Similarly, when the right brake pedal is stepped on alone, unilateral braking of the right side can be realized (see Figure 4 and Figure 5 ).

[0115] When the tractor is in road transport mode and the speed sensor detects that the vehicle speed is higher than the set value, the electromagnetic valve 4 is de-energized and reversed to the left working position. When no brake pedal is stepped on, the pressure reducing valve 1, the control valve A2 and the control valve B3 are in the positions shown in the figure, the oil source pressure oil acts on the P port, and the pressure reducing valve 1 is closed. The control valve A2 and the control valve B3 are in the lower working position under the action of the return spring, the left and right brakes are communicated with the oil tank through F1 and F2, and the electromagnetic valve 4 and the pressure reducing valve 1, and the brakes are in the pressure relief state.

[0116] When the brake pedal is stepped on for braking, the pressure reducing valve 1 opens, the pressure oil P is reduced to the required pressure and delivered to the control valve A2 and the control valve B3, which are simultaneously reversed to work in the upper working position, the brake pressure oil is delivered to the brake through F1 and F2, and the brake is braked under the action of the pressure oil; at the same time, the FR oil port pressure oil controls the trailer to brake.

[0117] If the pedal mechanical lock is forgotten to be connected or the mechanical lock is invalid at this time, only the left single brake pedal is stepped down, the reducing valve 1 and the control valve A2 are reversed under the action of the left brake pedal, the brake pressure oil P acts on the left brake through the reducing valve 1 and the control valve A2 upper working position, and the left single brake is realized. Since the right brake pedal is not stepped down, the reducing valve 1 is not reversed and is still in the corresponding position, at this time, the pressure control oil after the reducing valve 1 reaches the control valve B3 through the electromagnetic control valve left position, and then reaches the right brake through the control valve B3 lower working position, and the right brake and the left brake are simultaneously braked under the action of the pressure, and the trailer is braked through the FR oil port, that is, when the electromagnetic valve 4 is in the left working position, whether the single pedal brake is braked or the double pedal brake is braked, only the double simultaneous braking effect can be realized, and the driving safety in the high-speed driving process is ensured (see Figure 6 ).

[0118] The advantages of the utility model lie in that:

[0119] 1. The high-speed driving process is forced to be double-braked through the logical relationship between the control valves, the driving safety is ensured, and the rollover accident is avoided.

[0120] 2. The main brake valve controls the trailer to be braked synchronously, the rear-end collision accident caused by the front vehicle braking and the rear vehicle not braking or not timely braking is avoided.

[0121] 3. The automatic control is realized through the speed sensor, different braking driving is controlled according to the vehicle speed, the requirement for the driver is reduced, and the burden of the driver is reduced.

[0122] It should be noted that all the letters in the drawings only represent the related components or interfaces or oil ports or pipelines, and have no other substantial meanings.

[0123] Moreover, the frame line outside the whole system only integrates the internal structure as a whole, and has no other substantial meanings.

[0124] In addition, all the electronic components involved in the utility model adopt the prior art, and the above-mentioned components are electrically connected with the controller, and the control circuit between the controller and the components is the prior art.

[0125] It is apparent to a person skilled in the art that the present application is not restricted to the details of the foregoing exemplary embodiments, but that the present application can be implemented in other embodiments without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in a descriptive sense only and not for purposes of limitation. The present application is defined by the appended claims rather than by the foregoing description, and all changes and modifications that come within the meaning and range of equivalents of the claims are to be embraced within the scope of the present application. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0126] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0127] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic brake system capable of high speed positive double lateral braking, characterized by: The hydraulic brake system comprises a pressure reducing valve (1), an electromagnetic valve (4), a control valve A (2) and a control valve B (3), the pressure reducing valve (1) is provided with an interface g, an interface h and an interface i, the interface g is in communication with the interface h or the interface i; the interface h is in communication with one end of an oil return pipeline, and the interface i is in communication with one end of an oil inlet pipeline; The control valve A (2) is provided with an interface a, an interface b and an interface c, the interface b is in communication with the interface a or the interface c; the control valve B (3) is provided with an interface d, an interface e and an interface f, the interface e is in communication with the interface d or the interface f; the interface c is in communication with the interface g through a pipeline L1, and the interface f is in communication with the pipeline L1 through a pipeline L2; The electromagnetic valve (4) is provided with an interface j, an interface k and an interface m, the interface j is in communication with the interface k or the interface m; the interface m is in communication with the oil return pipeline through a pipeline L6, and the interface j is in communication with the pipeline L1 through a pipeline L3; the interface k is in communication with the interface a through a pipeline L4, and the interface d is in communication with the pipeline L4 through a pipeline L5. The interface b is in communication with one end of a brake pipeline L7, and the other end F1 of the brake pipeline L7 is used for communicating with a brake.

2. The hydraulic brake system capable of high speed positive double lateral braking according to claim 1, characterized in that: A spring interface on one end of the control valve A (2) is in communication with the brake pipeline L7 through a pipeline.

3. The hydraulic brake system capable of high speed positive double lateral braking according to claim 2, characterized in that: The interface e is in communication with one end of a brake pipeline L8, and the other end F2 of the brake pipeline L8 is used for communicating with a brake.

4. The hydraulic brake system capable of high speed positive double lateral braking of claim 1, wherein: A spring interface on one end of the control valve B (3) is in communication with the brake pipeline L8 through a pipeline.

5. The hydraulic brake system capable of high speed positive double lateral braking according to claim 4, characterized in that: The pipeline L3 is in communication with one end of a trailer brake pipeline L9, and the other end of the trailer brake pipeline L9 is used as a connection point FR.

6. The hydraulic brake system capable of high speed positive double lateral braking according to any one of claims 1 to 5, characterized in that: A spring interface on one end of the pressure reducing valve (1) is in communication with the pipeline L1 through a pipeline L10.

7. The hydraulic brake system capable of high speed positive double lateral braking according to any one of claims 1 to 5, characterized in that: A throttle valve (5) is fixedly installed on the pipeline L10.

8. The hydraulic brake system capable of high speed positive double lateral braking according to claim 7, characterized in that: The control valve A (2) and / or the control valve B (3) are two-position three-way valves.

9. The hydraulic brake system capable of high speed positive double lateral braking according to any one of claims 1-5, characterized in that: The hydraulic brake system capable of realizing high-speed forced double-sided braking comprises the hydraulic brake system capable of realizing high-speed forced double-sided braking according to any one of claims 1-9.

10. A tractor characterised in that: ​

Images