Wheel-driven hydraulic control system

Abstract

The utility model discloses a wheel-driven hydraulic control system. The wheel-driven hydraulic control system is characterized in that a hydraulic pump is connected with a pressure oil filter; the pressure oil filter is connected with the walking reversing valve; the walking reversing valve is connected with the first flow distributing and collecting valve and the second flow distributing and collecting valve; the left front wheel hydraulic motor is connected with the first flow distributing and collecting valve; the left rear wheel hydraulic motor is connected with the first flow distributing and collecting valve; the right front wheel hydraulic motor is connected with the second flow distributing and collecting valve; the right rear wheel hydraulic motor is connected with the second flow distributing and collecting valve; the first flow distributing and collecting valve is connected with the left front wheel hydraulic motor and the left rear wheel hydraulic motor and used for enabling flow entering the left front wheel hydraulic motor and the left rear wheel hydraulic motor to be the same. The second flow distributing and collecting valve is connected with the right front wheel hydraulic motor and the right rear wheel hydraulic motor and used for enabling the flow entering the right front wheel hydraulic motor and the right rear wheel hydraulic motor to be the same. The hydraulic control system can ensure the rotation speed synchronization of the walking motor, and belongs to the technical field of wheel type driving control.

Description

Technical Field

[0001] This utility model belongs to the field of wheel drive control technology, and specifically relates to a hydraulic control system for wheel drive. Background Technology

[0002] Traditional tracks are typically driven by a hydraulic drive system consisting of a hydraulic pump, hydraulic motor, hydraulic control valve, hydraulic oil tank, and linkage system. The hydraulic pump converts mechanical energy into high-pressure hydraulic oil, while the hydraulic motor converts the pressure energy of the hydraulic oil into rotational motion, driving the tracks. Furthermore, the hydraulic control valve is used to regulate flow and pressure to achieve precise control over track speed and steering.

[0003] Current hydraulic drive systems lack a control structure to ensure consistent oil flow to the hydraulic motor, resulting in asynchronous motor speeds. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic control system for wheel drive, which solves the problem that existing hydraulic drive systems lack a control structure to ensure consistent oil flow to the hydraulic motor, resulting in asynchronous speeds of the hydraulic motor.

[0005] The specific technical solution is as follows:

[0006] A wheel-driven hydraulic control system, comprising:

[0007] Hydraulic pump, connected to pressure oil filter;

[0008] Oil pressure filter, which is connected to the travel directional valve;

[0009] The travel reversing valve is connected to the left front wheel hydraulic motor, the left rear wheel hydraulic motor, the right front wheel hydraulic motor, the right rear wheel hydraulic motor, the first flow divider and the second flow divider.

[0010] The left front wheel hydraulic motor is connected to the first flow divider and combiner valve.

[0011] The left rear wheel hydraulic motor is connected to the first flow divider and combiner valve.

[0012] The right front wheel hydraulic motor is connected to the second flow divider / combiner valve.

[0013] The right rear wheel hydraulic motor is connected to the second flow divider and combiner valve.

[0014] The first flow divider valve connects the left front wheel hydraulic motor and the left rear wheel hydraulic motor to ensure that the flow rates entering the left front wheel hydraulic motor and the left rear wheel hydraulic motor are the same.

[0015] The second flow divider valve connects the right front wheel hydraulic motor and the right rear wheel hydraulic motor, and is used to ensure that the flow rates entering the right front wheel hydraulic motor and the right rear wheel hydraulic motor are the same.

[0016] Preferably, the hydraulic pump has an A1 port and an A2 port. The A1 port is connected to a flange ball valve via an oil suction pipe, and the A2 port is connected to a pressure oil filter.

[0017] Preferably, the travel reversing valve has a P1 port, a B1 port, a B2 port, a B3 port, and a B4 port. The P1 port is connected to the hydraulic oil filter, the B1 port is connected to the left front wheel hydraulic motor and the left rear wheel hydraulic motor, the B2 port is connected to the first flow divider / combiner valve, the B3 port is connected to the right front wheel hydraulic motor and the right rear wheel hydraulic motor, and the B4 port is connected to the second flow divider / combiner valve.

[0018] Preferably, the travel reversing valve also has a P2 port, which is connected to a three-way connector, and the three-way connector is connected to a four-way manual valve and a solenoid shut-off valve.

[0019] Preferably, the four-way manual valve is connected to a hydraulic cylinder, wherein the four-way manual valve has a C1 port and a C2 port, and the hydraulic cylinder has a rodless chamber and a rod chamber, with the C1 port and C2 port respectively connected to the rodless chamber and the rod chamber.

[0020] Preferably, the electromagnetic shut-off valve is connected to a proportional directional valve, the proportional directional valve has an LS1 port, the travel directional valve has an LS2 port, and the hydraulic pump has an S port, which is connected to the LS1 and LS2 ports.

[0021] Preferably, the proportional directional valve is connected to a rotary hydraulic motor, the rotary hydraulic motor has ports E1 and E2, and the proportional directional valve has ports D1 and D2, which are respectively connected to ports E1 and E2.

[0022] Compared with existing technologies, this utility model has the following beneficial effects:

[0023] 1. The present invention provides a wheel-driven hydraulic control system that utilizes a first diverter valve and a second diverter valve to ensure synchronized rotation speed of the travel motor.

[0024] 2. The wheel-driven hydraulic control system of this utility model uses a proportional directional valve in conjunction with a rotary hydraulic motor to synchronously control the flow and pressure of the rotary motor, thereby improving the steering speed and flexibility of the system. Existing hydraulic motors for driving tracks typically require an operating pressure of 25-35 MPa to meet high torque demands, which can lead to power waste during differential steering. In contrast, the wheel-driven hydraulic control system of this utility model operates within a medium-high pressure range (15-25 MPa), resulting in a wider pressure range. The wheel system has high transmission efficiency, and the lower pressure reduces wear on hydraulic hoses and components, while also being more affordable than high-pressure hydraulic components. Tracked systems require better heat dissipation design due to continuous high-load operation, while wheeled systems have less stringent requirements for heat dissipation systems.

[0025] 3. The wheel-driven hydraulic control system of this utility model can adjust the tire height by operating the manual directional valve to adapt to complex terrain. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of a wheel-driven hydraulic control system.

[0028] Among them, 1 is the left front wheel hydraulic motor, 2 is the left rear wheel hydraulic motor, 3 is the right front wheel hydraulic motor, 4 is the right rear wheel hydraulic motor, 5 is the first flow divider / combiner valve, 6 is the second flow divider / combiner valve, 7 is the proportional directional valve, 8 is the left front wheel support cylinder, 9 is the left rear wheel support cylinder, 10 is the right front wheel support cylinder, 11 is the right rear wheel support cylinder, 12 is the return oil filter, 13 is the check valve, 14 is the flange ball valve, 15 is the hydraulic pump, 16 is the pressure oil filter, 17 is the travel directional valve, and 18 is the four-way manual valve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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. The embodiments of this utility model will now be described based on its overall structure.

[0033] like Figure 1 As shown, this embodiment provides a wheel-driven hydraulic control system, including:

[0034] Hydraulic pump 15 is connected to hydraulic oil filter 16;

[0035] Hydraulic oil filter 16 is connected to travel directional valve 17; hydraulic oil filter 16 is used to filter the hydraulic oil pumped by hydraulic pump 15 to reduce damage to hydraulic system and valve assembly.

[0036] Travel directional valve 17 is connected to the left front wheel hydraulic motor 1, the left rear wheel hydraulic motor 2, the right front wheel hydraulic motor 3, the right rear wheel hydraulic motor 4, the first flow divider valve 5, and the second flow divider valve 6.

[0037] Left front wheel hydraulic motor 1, which is connected to the first diverter valve 5;

[0038] The left rear wheel hydraulic motor 2 is connected to the first diverter valve 5.

[0039] Right front wheel hydraulic motor 3, right front wheel hydraulic motor 3 is connected to the second diverter valve 6;

[0040] Right rear wheel hydraulic motor 4, which is connected to the second diverter valve 6;

[0041] The first diversion and combination valve 5 is connected to the left front wheel hydraulic motor 1 and the left rear wheel hydraulic motor 2, and is used to make the flow rate entering the left front wheel hydraulic motor 1 and the left rear wheel hydraulic motor 2 the same.

[0042] The second flow divider / combiner valve 6 connects the right front wheel hydraulic motor 3 and the right rear wheel hydraulic motor 4, ensuring that the flow rates entering the right front wheel hydraulic motor 3 and the right rear wheel hydraulic motor 4 are the same. Electrical signals, such as DT1, DT2, DT3, and DT4, are supplied to the coils of the travel directional valve 17. When these coils are energized, the travel directional valve 17 opens, allowing hydraulic oil to flow to the inlet and outlet ports of the corresponding hydraulic motors, thereby driving the corresponding hydraulic motors.

[0043] The flow rate to the left front wheel hydraulic motor 1, left rear wheel hydraulic motor 2, right front wheel hydraulic motor 3, and right rear wheel hydraulic motor 4 is made consistent by the flow-dividing and combining valve, so that the motors run at a consistent speed.

[0044] The travel directional valve 17 is also connected in sequence to a check valve 13 and a return oil filter 12.

[0045] The hydraulic pump 15 has ports A1 and A2. Port A1 is connected to a flange ball valve 14 via an oil suction pipe, and port A2 is connected to a pressure oil filter 16.

[0046] The travel reversing valve 17 has ports P1, B1, B2, B3 and B4. Port P1 is connected to the oil pressure filter 16, port B1 is connected to the left front wheel hydraulic motor 1 and the left rear wheel hydraulic motor 2, port B2 is connected to the first flow divider valve 5, port B3 is connected to the right front wheel hydraulic motor 3 and the right rear wheel hydraulic motor 4, and port B4 is connected to the second flow divider valve 6.

[0047] The travel reversing valve 17 also has a P2 port, which is connected to a three-way connector. The three-way connector is connected to a four-way manual valve 18 and a solenoid shut-off valve.

[0048] The four-way manual valve 18 is connected to a hydraulic cylinder. The four-way manual valve 18 has ports C1 and C2, and the hydraulic cylinder has a rodless chamber and a rod chamber. Ports C1 and C2 are connected to the rodless chamber and the rod chamber, respectively. By operating the handle of the four-way manual valve 18, the hydraulic cylinder can be extended and retracted, thereby adjusting the height of the driving wheels.

[0049] The electromagnetic shut-off valve is connected to a proportional directional valve 7, which has an LS1 port. The travel directional valve 17 has an LS2 port, and the hydraulic pump 15 has an S port, which connects to both the LS1 and LS2 ports. The hydraulic cylinders include a left front wheel support cylinder 8, a left rear wheel support cylinder 9, a right front wheel support cylinder 10, and a right rear wheel support cylinder 11. A four-way manual valve 18 is connected to the left front wheel support cylinder 8, the left rear wheel support cylinder 9, the right front wheel support cylinder 10, and the right rear wheel support cylinder 11, respectively.

[0050] The proportional directional valve 7 is connected to a rotary hydraulic motor. The rotary hydraulic motor has ports E1 and E2, while the proportional directional valve 7 has ports D1 and D2, which are connected to ports E1 and E2, respectively. When the coil of the proportional directional valve 7 is energized, the oil circuit is opened, driving the rotary motor to rotate. Adjust the pump's output pressure and flow rate to ensure that the system only provides the energy required by the actuator.

[0051] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A hydraulically controlled system for wheel drive, characterized in that The hydraulic pump is connected with the oil filter. The oil filter is connected with the walking reversing valve. The walking reversing valve is connected with the left front wheel hydraulic motor, the left rear wheel hydraulic motor, the right front wheel hydraulic motor, the right rear wheel hydraulic motor, the first shunt and the second shunt. The left front wheel hydraulic motor is connected with the first shunt. The left rear wheel hydraulic motor is connected with the first shunt. The right front wheel hydraulic motor is connected with the second shunt. The right rear wheel hydraulic motor is connected with the second shunt. The first shunt is connected with the left front wheel hydraulic motor and the left rear wheel hydraulic motor, and is used for making the flow entering the left front wheel hydraulic motor and the left rear wheel hydraulic motor same. The second shunt is connected with the right front wheel hydraulic motor and the right rear wheel hydraulic motor, and is used for making the flow entering the right front wheel hydraulic motor and the right rear wheel hydraulic motor same. The hydraulic pump has an A1 port and an A2 port, the A1 port is connected with a flange ball valve through an oil suction pipe, and the A2 port is connected with the oil filter.

2. A hydraulically controlled system for all-wheel drive according to claim 1, characterized in that The walking reversing valve has a P1 port, a B1 port, a B2 port, a B3 port and a B4 port, the P1 port is connected with the oil filter, the B1 port is connected with the left front wheel hydraulic motor and the left rear wheel hydraulic motor, the B2 port is connected with the first shunt; the B3 port is connected with the right front wheel hydraulic motor and the right rear wheel hydraulic motor, and the B4 port is connected with the second shunt.

3. A hydraulically controlled system for wheel drive according to claim 1, characterized in that The walking reversing valve further has a P2 port, the P2 port is connected with a three-way joint, the three-way joint is connected with a four-way manual valve and an electromagnetic cut-off valve.

4. A hydraulically controlled system for wheel drive according to claim 1, characterized in that The four-way manual valve is connected with a cylinder, wherein the four-way manual valve has a C1 port and a C2 port, the cylinder has a rodless cavity and a rod cavity, and the C1 port and the C2 port are connected with the rodless cavity and the rod cavity respectively.

5. A hydraulically controlled system for wheel drive according to claim 4, characterized in that The electromagnetic cut-off valve is connected with a proportional reversing valve, the proportional reversing valve has an LS1 port, the walking reversing valve has an LS2 port, the hydraulic pump has an S port, and the S port is connected with the LS1 port and the LS2 port.

6. A hydraulically controlled system for wheel drive according to claim 4, characterized in that The proportional reversing valve is connected with a rotary hydraulic motor, the rotary hydraulic motor has an E1 port and an E2 port, the proportional reversing valve has a D1 port and a D2 port, and the D1 port and the D2 port are connected with the E1 port and the E2 port respectively.

7. A hydraulically controlled system for wheel drive according to claim 6, characterized in that ​

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