Hydraulic system and pruning machine with same

Abstract

The utility model provides a hydraulic system and a pruning machine with the hydraulic system, the hydraulic system comprises a first switching valve, a motor assembly and an oil cylinder assembly, a first outlet is communicated with the motor assembly, and a second outlet is communicated with the oil cylinder assembly; when the first switching valve is located at the first switching position, the first flow inlet is communicated with the first flow outlet; when the first switching valve is located at the second switching position, the first outflow port and the second outflow port are both communicated with the first inflow port; the first electromagnetic valve is arranged between the first switching valve and the oil cylinder assembly, the second electromagnetic valve is arranged between the first switching valve and the motor assembly, and the first electromagnetic valve has a first circulation state enabling fluid to pass through and a first backflow state enabling the fluid to flow back to the backflow box. And the second electromagnetic valve has a second circulation state for enabling the fluid to pass through and a second backflow state for enabling the fluid to flow back to the backflow box. By adopting the technical scheme provided by the utility model, the technical problem that a hydraulic system of a pruning machine in the prior art is too complicated can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pruning machines, in particular to a hydraulic system and a pruning machine having the same. Background Art

[0002] At present, with the continuous development of domestic plantations, the scale of plantations is also expanding. During the pruning season, there is a large demand for personnel, high costs, high labor intensity, and a longer cycle. Therefore, the traditional method of relying on pure manual pruning and picking can no longer meet the current needs. Usually, plantations are equipped with special pruning machines for picking.

[0003] However, the prior art pruning machines usually require multiple sets of oil circuits to drive different structures respectively, which will make the hydraulic system of the pruning machine too complicated, make the internal structure of the pruning machine become complicated, and make the pruning machine bulky and inconvenient to use. Utility Model Content

[0004] The main purpose of the utility model is to provide a hydraulic system and a pruning machine having the same, so as to solve the technical problem that the hydraulic system of the pruning machine in the prior art is too complicated.

[0005] In order to achieve the above object, according to one aspect of the utility model, a hydraulic system is provided, comprising:

[0006] a first switching valve, a motor assembly and a cylinder assembly, wherein the first switching valve has a first inlet, a first outlet and a second outlet, the first outlet is connected to the motor assembly, the second outlet is connected to the cylinder assembly, and the first switching valve has a first switching position and a second switching position; when the first switching valve is in the first switching position, the first inlet is connected to the first outlet; when the first switching valve is in the second switching position, the first outlet and the second outlet are both connected to the first inlet;

[0007] a first solenoid valve and a second solenoid valve, the first solenoid valve being arranged between the first switching valve and the cylinder assembly, the second solenoid valve being arranged between the first switching valve and the motor assembly, the first solenoid valve having a first flow state for allowing fluid to pass through and a first return state for allowing fluid to return to a return tank, the second solenoid valve having a second flow state for allowing fluid to pass through and a second return state for allowing fluid to return to the return tank;

[0008] Among them, when the first switching valve is in the first switching position, the first solenoid valve is in the first flow state or the first reflux state; when the first switching valve is in the second switching position, the first solenoid valve is in the first flow state and the second solenoid valve is in the second flow state.

[0009] Furthermore, the first switching valve also has a first regulating port, a first regulating chamber, a second regulating port and a second regulating chamber. The first regulating port is connected to the first regulating chamber, and the first regulating port is connected to the oil circuit between the first flow outlet and the first solenoid valve; the second regulating port is connected to the second regulating chamber, and the second regulating port is connected to the oil circuit between the first solenoid valve and the cylinder assembly; the valve core position of the first switching valve is adjusted according to the oil pressure difference between the first regulating chamber and the second regulating chamber, so that the first switching valve switches to the first switching position or the second switching position.

[0010] Furthermore, the hydraulic system also includes:

[0011] A second switching valve is arranged between the second solenoid valve and the motor assembly, the second switching valve has a second inlet, the second inlet is connected to the outlet of the second solenoid valve; the second switching valve also has a third outlet and a fourth outlet, the third outlet is connected to the motor assembly, and the fourth outlet is connected to the reflux tank;

[0012] Among them, the second switching valve has a switchable third switching position, a fourth switching position and a fifth switching position; when the second switching valve is in the third switching position, the second inlet and the third outlet are connected; when the second switching valve is in the fourth switching position, the second inlet and the third outlet and the fourth outlet are connected; when the second switching valve is in the fifth switching position, the second inlet and the fourth outlet are connected.

[0013] Further, the motor assembly comprises:

[0014] A flow regulating structure and a motor, wherein the flow regulating structure is arranged between the third flow outlet and the motor;

[0015] Among them, the second switching valve also has a third regulating port, a third regulating chamber, a fourth regulating port and a fourth regulating chamber. The third regulating port is connected to the third regulating chamber, the third regulating port is connected to the oil circuit between the third flow outlet and the flow regulating structure, the fourth regulating port is connected to the fourth regulating chamber, and the fourth regulating port is connected to the oil circuit between the flow regulating structure and the motor, so as to adjust the position of the valve core of the second switching valve according to the flow regulating structure, so that the second switching valve switches to the third switching position, or the fourth switching position, or the fifth switching position.

[0016] Furthermore, the first solenoid valve has a first communication port and a second communication port, the first communication port is connected to the oil cylinder assembly, and the second communication port is connected to the first flow outlet; the first solenoid valve also has a third communication port and a fourth communication port, and the third communication port and the fourth communication port are both connected to the reflux tank;

[0017] Among them, when the first solenoid valve is in a flow state, the first connecting port and the second connecting port are connected, and the third connecting port and the fourth connecting port are connected; when the first solenoid valve is in a reflux state, the first connecting port and the third connecting port are connected, and the second connecting port and the fourth connecting port are connected to allow the fluid to flow back to the reflux tank.

[0018] Furthermore, the cylinder assembly comprises:

[0019] The oil cylinder and the third switching valve, the oil cylinder is used to drive the movement of the pruning assembly, the oil cylinder is connected to the first solenoid valve through the third switching valve; the third switching valve has a third inlet, a fifth outlet and a sixth outlet, the third inlet is connected to the second outlet, the fifth outlet is connected to the rodless cavity of the oil cylinder, and the sixth outlet is connected to the rod cavity of the oil cylinder;

[0020] Among them, the third switching valve has a flow cut-off position, a first flow supply position and a second flow supply position. When the third switching valve is in the flow cut-off position, the third switching valve is in a disconnected state; when the third switching valve is in the first flow supply position, the fluid flows to the cylinder through the fifth flow outlet; when the third switching valve is in the second flow supply position, the fluid flows to the cylinder through the sixth flow outlet.

[0021] Furthermore, there are multiple cylinder assemblies, and the multiple cylinder assemblies are respectively connected to the multiple moving parts of the pruning assembly in a one-to-one driving manner, and each cylinder assembly is used to drive the corresponding moving part to move, and at least two of the multiple moving parts have different driving directions;

[0022] There are multiple third switching valves, and the multiple third switching valves are correspondingly arranged with the multiple cylinder assemblies, and each third switching valve is connected to the corresponding cylinder assembly.

[0023] Furthermore, the cylinder assembly comprises:

[0024] Hydraulic locks, there are at least two hydraulic locks, and the at least two hydraulic locks are respectively arranged corresponding to the fifth outflow port and the sixth outflow port;

[0025] Among them, the hydraulic lock has a blocking state and an avoidance state; when the hydraulic lock is in the blocking state, the hydraulic lock blocks the flow path between the fifth flow outlet and the sixth flow outlet and the oil cylinder to block the fluid from flowing to the reflux box.

[0026] Furthermore, the hydraulic system also includes:

[0027] a first overflow valve, wherein the inlet end of the first overflow valve is connected to the regulating chamber of the first switching valve, and the outlet end of the first overflow valve is connected to the reflux tank; when the pressure of the regulating chamber of the first switching valve is higher than a first preset value, the fluid in the regulating chamber of the first switching valve flows back to the reflux tank through the first overflow valve for pressure relief; and / or,

[0028] a second overflow valve, wherein the inlet end of the second overflow valve is connected to the regulating chamber of the second switching valve, and the outlet end of the second overflow valve is connected to the reflux tank; when the pressure of the regulating chamber of the second switching valve is higher than the second preset value, the fluid in the regulating chamber of the second switching valve flows back to the reflux tank through the second overflow valve for pressure relief; and / or,

[0029] The oil pump and the oil suction filter are arranged between the reflux tank and the oil pump, and the oil suction filter is used to filter the oil.

[0030] According to another aspect of the utility model, there is provided a pruning machine, comprising:

[0031] The hydraulic system provided above;

[0032] The pruning assembly comprises a pruning part and a moving part, a motor assembly of the hydraulic system is drivingly connected to the pruning part, and a cylinder assembly of the hydraulic system is drivingly connected to the moving part.

[0033] By applying the technical solution of the utility model, by controlling the first switching valve, the first solenoid valve and the second solenoid valve, when the first switching valve is in the first switching position, the first solenoid valve is in the first flow state or the first reflux state; when the first switching valve is in the first flow state, the first solenoid valve is in the first flow state and the second solenoid valve is in the second flow state. In the above oil circuit structure, it is only necessary to realize the connection relationship between the first switching valve, the first solenoid valve and the second solenoid valve, and there is no need to set up multiple complex oil circuits, thereby simplifying the hydraulic system of the pruning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0035] Figure 1 An overall schematic diagram of a hydraulic system provided according to an embodiment of the utility model is shown;

[0036] Figure 2 A schematic diagram showing a hydraulic system provided according to an embodiment of the utility model in a neutral state;

[0037] Figure 3 A schematic diagram of a hydraulic system provided according to an embodiment of the utility model when the motor is started is shown;

[0038] Figure 4 A schematic diagram of a hydraulic system provided according to an embodiment of the utility model when the oil cylinder is in a starting state is shown.

[0039] The above drawings include the following reference numerals:

[0040] 10. First switching valve; 11. First inlet; 12. First outlet; 13. Second outlet; 14. First regulating port; 15. Second regulating port;

[0041] 20. Oil pump;

[0042] 30. Motor assembly; 31. Flow regulating structure; 32. Motor;

[0043] 40. Oil cylinder assembly; 41. Oil cylinder; 42. Third switching valve; 421. Fifth outlet; 422. Sixth outlet; 43. Hydraulic lock;

[0044] 51, first solenoid valve; 511, first communication port; 512, second communication port; 513, third communication port; 514, fourth communication port; 52, second solenoid valve;

[0045] 60. Reflux box;

[0046] 70, second switching valve; 71, second inlet; 72, third outlet; 73, fourth outlet; 74, third regulating port; 75, fourth regulating port;

[0047] 81. first relief valve; 82. second relief valve;

[0048] 90. Oil suction filter. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] Please refer to Figures 1 to 4In the first embodiment of the present invention, a hydraulic system is provided, which includes a first switching valve 10, a motor assembly 30, a cylinder assembly 40, a first solenoid valve 51 and a second solenoid valve 52. The first switching valve 10 has a first inlet 11, a first outlet 12 and a second outlet 13. The first outlet 12 is connected to the motor assembly 30, and the second outlet 13 is connected to the cylinder assembly 40. The first switching valve 10 has a first switching position and a second switching position. When the first switching valve 10 is in the first switching position, the first inlet 11 is connected to the first outlet 12; when the first switching valve 10 is in the second switching position, the first outlet 12 and the second outlet 13 are both connected to the first inlet 11. The first solenoid valve 51 and the second solenoid valve 52 are provided between the first switching valve 10 and the cylinder assembly 40, and the second solenoid valve 52 is provided between the first switching valve 10 and the motor assembly 30. The first solenoid valve 51 has a first flow state for allowing fluid to pass through and a first return state for allowing fluid to flow back to the return tank 60, and the second solenoid valve 52 has a second flow state for allowing fluid to pass through and a second return state for allowing fluid to flow back to the return tank 60. When the first switching valve 10 is in the first switching position, the first solenoid valve 51 is in the first flow state or the first return state; when the first switching valve 10 is in the second switching position, the first solenoid valve 51 is in the first flow state, and the second solenoid valve 52 is in the second flow state.

[0051] The hydraulic system provided by the utility model can control the first switching valve 10, the first solenoid valve 51 and the second solenoid valve 52, so that when the first switching valve 10 is in the first switching position, the first solenoid valve 51 is in the first flow state or the first reflux state; when the first switching valve 10 is in the first flow state, the first solenoid valve 51 is in the first flow state, and the second solenoid valve 52 is in the second flow state. In the above-mentioned oil circuit structure, it is only necessary to realize the connection relationship between the first switching valve 10, the first solenoid valve 51 and the second solenoid valve 52, and there is no need to set up multiple complex oil circuits, so as to simplify the hydraulic system of the pruning system. Therefore, the technical solution provided by the utility model can solve the technical problem that the hydraulic system of the pruning machine in the prior art is too complicated.

[0052] It should be noted that the return tank 60 may be an oil tank, and the fluid may be oil. Specifically, the first switching valve 10 and the second switching valve 70 may be flow valves.

[0053] Specifically, with such a setting, when the motor assembly 30 and the cylinder assembly 40 do not need to be operated, the first solenoid valve 51 and the second solenoid valve 52 are not energized, the first switching valve 10 is in position a (corresponding to the first position) under the action of oil pressure, and the oil is directly delivered to the second solenoid valve 52 after passing through the first switching valve 10, and then returns to the return tank 60. When the cylinder 41 needs to be adjusted, the second solenoid valve 52 and the first solenoid valve 51 are both energized, and the first solenoid valve 51 is in a flow state. At this time, under the action of the oil pressure at the inflow end and the outflow end of the first solenoid valve 51, the first switching valve 10 moves to the second switching position, thereby simplifying the control oil circuit of the motor assembly 30 and the cylinder assembly 40, and solving the technical problem that the hydraulic system of the pruning machine in the prior art is too complicated.

[0054] Specifically, the first switching valve 10 also has a first regulating port 14, a first regulating chamber, a second regulating port 15 and a second regulating chamber. The first regulating port 14 is connected to the first regulating chamber, and the first regulating port 14 is connected to the oil circuit between the first outflow port 12 and the first solenoid valve 51; the second regulating port 15 is connected to the second regulating chamber, and the second regulating port 15 is connected to the oil circuit between the first solenoid valve 51 and the cylinder assembly 40; the valve core position of the first switching valve 10 is adjusted according to the oil pressure difference between the first regulating chamber and the second regulating chamber, so that the first switching valve 10 is switched to the first switching position or the second switching position. With such a structural setting, only the switch of the first solenoid valve 51 needs to be switched, so that the oil pressure of the first regulating chamber and the second regulating chamber can be controlled, thereby realizing the adjustment of the position of the valve core of the first switching valve 10, so as to facilitate the switching of the first switching valve 10 to the first switching position or the second switching position.

[0055] In this embodiment, the hydraulic system further includes a second switching valve 70, which is disposed between the second solenoid valve 52 and the motor assembly 30. The second switching valve 70 has a second inlet 71, which is connected to the second solenoid valve 52; the second switching valve 70 has a third outlet 72 and a fourth outlet 73, the third outlet 72 is connected to the motor assembly 30, and the fourth outlet 73 is connected to the return tank 60. The second switching valve 70 has a switchable third position, a fourth position, and a fifth position. When the second switching valve 70 is in the third position, the second inlet 71 is connected to the third outlet 72; when the second switching valve 70 is in the fourth position, the second inlet 71 is connected to the third outlet 72 and the fourth outlet 73; when the second switching valve 70 is in the fifth position, the second inlet 71 is connected to the fourth outlet 73. With such a setting, the oil flow to the motor assembly 30 can be controlled by the second switching valve 70, and the oil supply and oil return to the motor assembly 30 can be achieved respectively through the third position and the fifth position of the second switching valve 70. When the second switching valve 70 is in the fourth position, a small flow rate of oil supply can be achieved, thereby meeting the different working conditions of the motor assembly 30.

[0056] Specifically, the motor assembly 30 includes a flow regulating structure 31 and a motor 32, the flow regulating structure 31 is arranged between the third flow outlet 72 and the motor assembly 30, and the second switching valve 70 also has a third regulating port 74, a third regulating chamber, a fourth regulating port 75 and a fourth regulating chamber, the third regulating port 74 is connected to the third regulating chamber, the third regulating port 74 is connected to the oil path between the third flow outlet 72 and the flow regulating structure 31, the fourth regulating port 75 is connected to the fourth regulating chamber, and the fourth regulating port 75 is connected to the oil path between the flow regulating structure 31 and the motor 32, so as to adjust the position of the valve core of the second switching valve 70 according to the flow regulating structure 31, so that the second switching valve 70 is switched to the third switching position, or the fourth switching position, or the fifth switching position. With such a structural setting, by adjusting the flow of the flow regulating structure 31, it is convenient to control the flow of the fluid flowing from the third flow outlet 72 to the motor assembly 30, thereby realizing the switching of the position of the second switching valve 70, so that the second switching valve 70 moves to the third switching position, or the fourth switching position, or the fifth switching position. With such a setting, the user can further control the rotation speed of the motor 32 of the motor assembly 30 through the flow regulating structure 31, and further control the adjustment of the second switching valve 70 according to the size of the flow in the flow regulating structure 31, so as to better meet the different working conditions of the motor assembly 30.

[0057] Specifically, the flow regulating structure 31 is a flow regulating valve.

[0058] In this embodiment, the first solenoid valve 51 has a first communication port 511 and a second communication port 512, the first communication port 511 is connected to the cylinder assembly 40, and the second communication port 512 is connected to the first flow outlet 12; the first solenoid valve 51 also has a third communication port 513 and a fourth communication port 514, and the third communication port 513 and the fourth communication port 514 are both connected to the return box 60. When the first solenoid valve 51 is in a flow state, the first communication port 511 and the second communication port 512 are connected, and the third communication port 513 and the fourth communication port 514 are connected; when the first solenoid valve 51 is in a reflux state, the first communication port 511 and the third communication port 513 are connected, and the second communication port 512 and the fourth communication port 514 are connected to realize the reflux of the fluid. With such a setting, the oil supply to the cylinder assembly 40 and the oil return operation of the cylinder assembly 40 can be realized through the first solenoid valve 51.

[0059] Specifically, the oil cylinder assembly 40 includes an oil cylinder 41 and a third switching valve 42. The oil cylinder 41 is used to drive the movement of the pruning assembly. The oil cylinder 41 is connected to the first solenoid valve 51 through the third switching valve 42. The third switching valve 42 has a fifth outlet 421 and a sixth outlet 422. The fifth outlet 421 is connected to the rodless cavity of the oil cylinder 41, and the sixth outlet 422 is connected to the rod cavity of the oil cylinder 41. The third switching valve 42 has a flow cut-off position, a first flow supply position, and a second flow supply position. When the third switching valve 42 is in the flow cut-off position, the third switching valve 42 is in a circuit-breaking state. When the third switching valve 42 is in the first flow supply position, the fluid flows to the oil cylinder 41 through the fifth outlet 421. When the third switching valve 42 is in the second flow supply position, the fluid flows to the oil cylinder 41 through the sixth outlet 422. With such a setting, it is possible to prevent oil from flowing into the cylinder assembly 40 when the third switching valve 42 is in the cut-off position, so as to prevent the cylinder assembly 40 from accidentally moving. The mutual switching of the first supply position and the second supply position of the third switching valve 42 can switch the direction of the oil flowing to the cylinder 41. By having the oil flow into the rodless chamber and the rod chamber of the cylinder 41 respectively, the piston rod in the cylinder 41 can be moved in different directions, thereby realizing the movement of the cylinder assembly 40 in different directions.

[0060] In this embodiment, there are multiple cylinder assemblies 40, and the multiple cylinder assemblies 40 are respectively arranged in one-to-one correspondence with the multiple moving parts of the pruning assembly. Each cylinder assembly 40 is used to drive the corresponding moving part to move, and the driving directions of at least two of the multiple moving parts are different, so that at least two of the multiple cylinder assemblies 40 respectively drive the movement of the pruning assembly in different directions. There are also multiple third switching valves 42, and the multiple third switching valves 42 are correspondingly arranged with the multiple cylinder assemblies 40, and each third switching valve 42 is connected to the corresponding cylinder assembly 40. With such a setting, the cylinder assembly 40 can drive the pruning assembly to move in different directions, thereby realizing multi-directional movement of the cylinder assembly 40.

[0061] Specifically, the oil cylinder assembly 40 further includes a hydraulic lock 43, and there are at least two hydraulic locks 43, and at least two hydraulic locks 43 are respectively arranged corresponding to the fifth outflow port 421 and the sixth outflow port 422. The hydraulic lock 43 has a blocking state and an avoidance state. When the hydraulic lock 43 is in the blocking state, the hydraulic lock 43 blocks the flow path between the fifth outflow port 421 and the sixth outflow port 422 and the oil cylinder 41 to block the fluid from flowing to the return box 60. With such a setting, the oil path can be locked to prevent the oil from flowing after the piston rod in the oil cylinder 41 moves to the target position, so that the oil cylinder 41 maintains its position.

[0062] In this embodiment, the hydraulic system further includes a first overflow valve 81, the inlet end of the first overflow valve 81 is connected to the regulating chamber of the first switching valve 10, and the outlet end of the first overflow valve 81 is connected to the reflux tank 60; when the pressure of the regulating chamber of the first switching valve 10 is higher than the first preset value, the fluid in the regulating chamber of the first switching valve 10 flows back to the reflux tank 60 through the first overflow valve 81 for pressure relief. In this way, the overflow of the first overflow valve 81 can prevent excessive pressure from damaging the oil circuit. Specifically, when the first regulating port 14 is connected to the inlet end of the first overflow valve 81, when the pressure of the first regulating chamber of the first switching valve 10 is higher than the first preset value, the fluid in the first regulating chamber of the first switching valve 10 flows back to the reflux tank 60 through the first overflow valve 81.

[0063] Specifically, a flow regulating valve can be arranged between the first regulating port 14 and the inlet of the first overflow valve 81, and a flow regulating valve can be arranged between the second regulating port 15 and the first flow outlet 12 and the inlet of the first solenoid valve 51, so as to respectively adjust the pressure of the first regulating chamber and the pressure of the second regulating chamber.

[0064] Specifically, the hydraulic system further includes a second overflow valve 82, the inlet end of the second overflow valve 82 is connected to the regulating chamber of the second switching valve 70, and the outlet end of the second overflow valve 82 is connected to the reflux tank 60; when the pressure of the regulating chamber of the second switching valve 70 is higher than the second preset value, the fluid in the regulating chamber of the second switching valve 70 flows back to the reflux tank 60 through the second overflow valve 82 for pressure relief. In this way, the overflow of the second overflow valve 82 can prevent the oil circuit from being damaged by excessive pressure. Specifically, when the third regulating port 74 is connected to the inlet end of the second overflow valve 82, when the pressure of the third regulating chamber of the second switching valve 70 is higher than the first preset value, the fluid in the third regulating chamber of the second switching valve 70 flows back to the reflux tank 60 through the second overflow valve 82.

[0065] Specifically, a flow regulating valve may be provided at the third regulating port 74 and a flow regulating valve may be provided at the fourth regulating port 75 so as to respectively regulate the pressures of the third regulating chamber and the fourth regulating chamber.

[0066] Specifically, the hydraulic system further includes an oil pump 20 and an oil suction filter 90. The oil suction filter 90 is disposed between the reflux tank 60 and the oil pump 20, and is used to filter the oil. With such an arrangement, the oil in the flow path can be kept clean by the filtering effect of the oil suction filter 90, thereby ensuring that each device can operate normally.

[0067] like Figure 2 As shown, the working conditions in the neutral state are as follows: after the whole machine is started, the oil pump 20 delivers the oil from the reflux tank 60 to the first switching valve 10 through the oil suction filter 90; at this time, the second solenoid valve 52 and the first solenoid valve 51 are both in a non-energized state, and the first switching valve 10 is in the right connection position under the action of oil pressure, and the oil is directly delivered to the second solenoid valve 52 after passing through the first switching valve 10, and then returns to the reflux tank 60.

[0068] like Figure 3 As shown, the working condition in the motor starting state is as follows: when the second solenoid valve 52 is energized, the pressure oil is delivered to the second solenoid valve 52 through the first switching valve 10, and then to the second switching valve 70, and finally to the motor 32 to control the rotation of the motor 32. The rotation speed of the motor 32 can be adjusted in real time by the flow regulating valve in the second switching valve 70. The return oil of the motor 32 is combined and returned to the return tank 60.

[0069] like Figure 4 As shown, the action in the cylinder start state is as follows: when the cylinder 41 needs to be adjusted, the first solenoid valve 51 is also energized, and the pressure oil is simultaneously delivered to the second solenoid valve 52 and the first solenoid valve 51 after passing through the first switching valve 10, so as to simultaneously control the rotation of the motor 32 and the extension and contraction of the cylinder 41. When one of the third switching valves 42 is energized, the pressure oil is delivered to the hydraulic lock and throttle through the third switching valve 42, and then to the cylinder 41, so as to control the action of the cylinder 41. The return oil of the cylinder 41 passes through the hydraulic lock and throttle and the third switching valve 42, and returns to the return tank 60.

[0070] In the second embodiment of the present invention, a pruning machine is provided, which includes the hydraulic system and pruning components in the first embodiment, the pruning components include a pruning part and a moving part, the motor component 30 of the hydraulic system is drivingly connected to the pruning part, and the cylinder component 40 of the hydraulic system is drivingly connected to the moving part.

[0071] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: according to the dynamic control of the oil pressure, the first switching valve 10 is driven to realize the oil supply control to the motor assembly 30 and the cylinder assembly 40, which can simplify the control oil circuit of the motor assembly 30 and the cylinder assembly 40, and can solve the technical problem that the hydraulic system of the mowing machine in the prior art is too complicated.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0074] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0077] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic system, characterized in that: include: A first switching valve (10), a motor assembly (30) and a cylinder assembly (40), wherein the first switching valve (10) has a first inlet (11), a first outlet (12) and a second outlet (13), wherein the first outlet (12) is connected to the motor assembly (30), and the second outlet (13) is connected to the cylinder assembly (40), and the first switching valve (10) has a first switching position and a second switching position; when the first switching valve (10) is in the first switching position, the first inlet (11) and the first outlet (12) are connected; when the first switching valve (10) is in the second switching position, the first outlet (12) and the second outlet (13) are both connected to the first inlet (11); a first solenoid valve (51) and a second solenoid valve (52), wherein the first solenoid valve (51) is arranged between the first switching valve (10) and the cylinder assembly (40), and the second solenoid valve (52) is arranged between the first switching valve (10) and the motor assembly (30), wherein the first solenoid valve (51) has a first flow state for allowing fluid to pass through and a first return state for allowing fluid to flow back to a return tank (60), and the second solenoid valve (52) has a second flow state for allowing fluid to pass through and a second return state for allowing fluid to flow back to the return tank (60); When the first switching valve (10) is in the first switching position, the first solenoid valve (51) is in the first flow state or the first reflux state; when the first switching valve (10) is in the second switching position, the first solenoid valve (51) is in the first flow state, and the second solenoid valve (52) is in the second flow state.

2. The hydraulic system according to claim 1, characterized in that: The first switching valve (10) further comprises a first regulating port (14), a first regulating chamber, a second regulating port (15) and a second regulating chamber, wherein the first regulating port (14) is connected to the first regulating chamber, and the first regulating port (14) is connected to the oil path between the first outflow port (12) and the first solenoid valve (51); the second regulating port (15) is connected to the second regulating chamber, and the second regulating port (15) is connected to the oil path between the first solenoid valve (51) and the cylinder assembly (40); the valve core position of the first switching valve (10) is adjusted according to the oil pressure difference between the first regulating chamber and the second regulating chamber, so that the first switching valve (10) is switched to the first switching position or the second switching position.

3. The hydraulic system according to claim 1, characterized in that: The hydraulic system further comprises: a second switching valve (70) disposed between the second solenoid valve (52) and the motor assembly (30), the second switching valve (70) having a second inlet (71), the second inlet (71) being in communication with an outlet of the second solenoid valve (52); the second switching valve (70) having a third outlet (72) and a fourth outlet (73), the third outlet (72) being in communication with the motor assembly (30), the fourth outlet (73) being in communication with the return tank (60); The second switching valve (70) has a switchable third switching position, a fourth switching position and a fifth switching position; when the second switching valve (70) is in the third switching position, the second inlet (71) and the third outlet (72) are connected; when the second switching valve (70) is in the fourth switching position, the second inlet (71) and the third outlet (72) and the fourth outlet (73) are connected; when the second switching valve (70) is in the fifth switching position, the second inlet (71) and the fourth outlet (73) are connected.

4. The hydraulic system according to claim 3, characterized in that: The motor assembly (30) comprises: a flow regulating structure (31) and a motor (32), wherein the flow regulating structure (31) is arranged between the third flow outlet (72) and the motor (32); The second switching valve (70) further comprises a third regulating port (74), a third regulating chamber, a fourth regulating port (75) and a fourth regulating chamber, wherein the third regulating port (74) is connected to the third regulating chamber, the third regulating port (74) is connected to the oil path between the third outflow port (72) and the flow regulating structure (31), the fourth regulating port (75) is connected to the fourth regulating chamber, the fourth regulating port (75) is connected to the oil path between the flow regulating structure (31) and the motor (32), so as to adjust the position of the valve core of the second switching valve (70) according to the flow regulating structure (31), so as to switch the second switching valve (70) to the third switching position, the fourth switching position, or the fifth switching position.

5. The hydraulic system according to claim 1, characterized in that: The first solenoid valve (51) has a first communication port (511) and a second communication port (512), the first communication port (511) is in communication with the oil cylinder assembly (40), and the second communication port (512) is in communication with the first outflow port (12); the first solenoid valve (51) also has a third communication port (513) and a fourth communication port (514), both of which are in communication with the return tank (60); Wherein, when the first solenoid valve (51) is in the flow state, the first connecting port (511) and the second connecting port (512) are connected, and the third connecting port (513) and the fourth connecting port (514) are connected; when the first solenoid valve (51) is in the reflux state, the first connecting port (511) and the third connecting port (513) are connected, and the second connecting port (512) and the fourth connecting port (514) are connected to allow the fluid to reflux to the reflux box (60).

6. The hydraulic system according to claim 5, characterized in that: The oil cylinder assembly (40) comprises: An oil cylinder (41) and a third switching valve (42), wherein the oil cylinder (41) is used to drive the movement of the pruning assembly, and the oil cylinder (41) is connected to the first solenoid valve (51) via the third switching valve (42); the third switching valve (42) has a third inlet, a fifth outlet (421) and a sixth outlet (422), wherein the third inlet is connected to the second outlet (13), the fifth outlet (421) is connected to the rodless chamber of the oil cylinder (41), and the sixth outlet (422) is connected to the rod chamber of the oil cylinder (41); The third switching valve (42) has a flow cut-off position, a first flow supply position and a second flow supply position. When the third switching valve (42) is in the flow cut-off position, the third switching valve (42) is in a disconnected state; when the third switching valve (42) is in the first flow supply position, the fluid flows to the oil cylinder (41) through the fifth flow outlet (421); when the third switching valve (42) is in the second flow supply position, the fluid flows to the oil cylinder (41) through the sixth flow outlet (422).

7. The hydraulic system according to claim 6, characterized in that: There are a plurality of the oil cylinder assemblies (40), and the plurality of the oil cylinder assemblies (40) are respectively connected to the plurality of moving parts of the pruning assembly in a one-to-one driving manner, and each of the oil cylinder assemblies (40) is used to drive the corresponding moving part to move, and at least two of the plurality of moving parts have different driving directions; There are a plurality of the third switching valves (42), and the plurality of the third switching valves (42) and the plurality of the oil cylinder assemblies (40) are arranged correspondingly, and each of the third switching valves (42) is connected to the corresponding oil cylinder assembly (40).

8. The hydraulic system according to claim 6, characterized in that: The oil cylinder assembly (40) comprises: A hydraulic lock (43), wherein there are at least two hydraulic locks (43), and the at least two hydraulic locks (43) are respectively arranged corresponding to the fifth outflow port (421) and the sixth outflow port (422); The hydraulic lock (43) has a blocking state and an avoidance state; when the hydraulic lock (43) is in the blocking state, the hydraulic lock (43) blocks the flow path between the fifth flow outlet (421) and the sixth flow outlet (422) and the oil cylinder (41) to block the fluid from flowing to the return box (60).

9. The hydraulic system according to claim 3, characterized in that: The hydraulic system further comprises: a first overflow valve (81), wherein an inlet end of the first overflow valve (81) is connected to a regulating chamber of the first switching valve (10), and an outlet end of the first overflow valve (81) is connected to the reflux tank (60); when the pressure of the regulating chamber of the first switching valve (10) is higher than a first preset value, the fluid in the regulating chamber of the first switching valve (10) flows back to the reflux tank (60) through the first overflow valve (81) to release the pressure; and / or, a second overflow valve (82), wherein an inlet end of the second overflow valve (82) is connected to a regulating chamber of the second switching valve (70), and an outlet end of the second overflow valve (82) is connected to the reflux tank (60); when the pressure of the regulating chamber of the second switching valve (70) is higher than a second preset value, the fluid in the regulating chamber of the second switching valve (70) flows back to the reflux tank (60) through the second overflow valve (82) to release the pressure; and / or, An oil pump (20) and an oil suction filter (90), wherein the oil suction filter (90) is arranged between the reflux tank (60) and the oil pump (20), and the oil suction filter (90) is used to filter oil.

10. A pruning machine, characterized in that: include: The hydraulic system according to any one of claims 1 to 9; A pruning assembly comprises a pruning part and a moving part, a motor assembly (30) of the hydraulic system is drivingly connected to the pruning part, and a cylinder assembly (40) of the hydraulic system is drivingly connected to the moving part.

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