Suspension cab hydraulic system and tractor

Abstract

The utility model relates to a suspension cab hydraulic system and tractor, including oil liquid control valve bank, two hydraulic cylinder control valve bank, two hydraulic cylinder and energy storage mechanism, oil liquid control valve bank is provided with oil inlet P, oil return port T and oil outlet, oil outlet and oil inlet P or oil return port T are communicated; the two hydraulic cylinder control valve sets are provided with a first connector, a lower cavity connector, a second connector, an upper cavity connector and a third connector respectively, wherein the first connector and the lower cavity connector are communicated with each other, and the second connector, the upper cavity connector and the third connector are communicated with each other. The lower cavities of the two hydraulic cylinders are respectively communicated with the two lower cavity interfaces through pipelines, and the upper cavities of the two hydraulic cylinders are respectively communicated with the upper cavity interface through pipe orifices; the energy storage mechanism communicates with the two third connectors through pipelines. The hydraulic suspension type cab has the advantages of being compact in structure, capable of achieving semi-active damping and good in comfort.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, specifically to a hydraulic system for a suspended cab and a tractor. Background Technology

[0002] When a tractor is driven on uneven terrain, the cab experiences significant shaking and movement, causing discomfort to the driver. Traditional methods to address this issue typically employ a rigid cab or springs for shock absorption. However, these methods are passive and ineffective, failing to guarantee driver comfort. Utility Model Content

[0003] This utility model provides a suspended cab hydraulic system and a tractor, aiming to solve the problems in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A hydraulic system for a suspended cab includes an oil control valve group, two hydraulic cylinder control valve groups, two hydraulic cylinders, and an energy storage mechanism. The oil control valve group is provided with an oil inlet P, an oil return port T, and an oil outlet. The oil outlet is connected to the oil inlet P or the oil return port T.

[0006] The two hydraulic cylinder control valve groups are respectively provided with an interconnected interface 1 and a lower cavity interface, an interconnected interface 2 and an upper cavity interface, and an interface 3. Each interface 3 can be connected to the connection between the corresponding interface 1 and the lower cavity interface.

[0007] The lower chambers of the two hydraulic cylinders are respectively connected to the two lower chamber interfaces through pipelines, and their upper chambers are respectively connected to the upper chamber interfaces through pipe openings; the energy storage mechanism is respectively connected to the two interfaces through pipelines.

[0008] The beneficial effects of this utility model are: during vehicle operation, in automatic mode, the vehicle is in a stable driving state, the energy storage mechanism is filled with oil, and the energy storage mechanism uses two hydraulic cylinder control valve groups to supply oil to the two hydraulic cylinders, ensuring that the two hydraulic cylinders operate smoothly.

[0009] In manual mode, the oil enters through the oil inlet P, and then passes through the control valve group of the two hydraulic cylinders to enter the lower chamber of the two hydraulic cylinders, so as to extend the two hydraulic cylinders and thus raise the seat.

[0010] In addition, the oil in the lower chambers of the two hydraulic cylinders flows back to the return port T through the control valve group of the two hydraulic cylinders, so as to realize the contraction of the two hydraulic cylinders and thus realize the lowering of the seat.

[0011] This utility model has a compact structure and provides a hydraulically suspended cab with semi-active shock absorption, resulting in good comfort.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, each of the hydraulic cylinder control valve groups includes a solenoid valve, a filling check valve, and a throttle valve. The filling check valve and the throttle valve are connected in parallel, with one end of the valve connected to the oil outlet through a pipeline, and the other end of the valve connected to the lower chamber of the corresponding hydraulic cylinder through a pipeline.

[0014] The solenoid valve is provided with an oil port 1 and an oil port 2 that are connected or disconnected. The oil port 1 is connected to the filling check valve and the other end of the throttle valve 1 through a pipeline that connects to the lower chamber of the hydraulic cylinder. The oil port 2 is connected to the energy storage mechanism through a pipeline. The extension rods of the two hydraulic cylinders are respectively connected to displacement sensors.

[0015] The beneficial effect of adopting the above-mentioned further solution is that during the vehicle's operation, in automatic mode, the vehicle is in a stable driving state, the energy storage mechanism is filled with oil, and the energy storage mechanism uses two solenoid valves to supply oil to two hydraulic cylinders, ensuring that the two hydraulic cylinders operate smoothly.

[0016] In manual mode, the oil enters through the oil inlet P, and then passes through two throttle valves to enter the lower chambers of the two hydraulic cylinders. At the same time, the accumulator is charged with fluid to extend the two hydraulic cylinders, thereby raising the seat.

[0017] In addition, the oil in the lower chambers of the two hydraulic cylinders flows back to the return port T through two filling check valves to achieve the contraction of the two hydraulic cylinders, thereby lowering the seat;

[0018] During vehicle operation, a displacement sensor detects the displacement of the hydraulic cylinder, which is converted into a current signal. The controller then controls the opening of solenoid valve one based on this current signal, thereby controlling the amount of oil entering and exiting.

[0019] Furthermore, each of the hydraulic cylinder control valve groups also includes a pressure relief valve. The two ports on the pressure relief valve are respectively connected to the energy storage mechanism and the second oil port through a pipeline, and to the lower chamber of the hydraulic cylinder through a pipeline connecting the other end of the filling check valve and the first throttle valve.

[0020] The advantages of adopting the above-mentioned further scheme are that the structure is simple and the design is reasonable. When the pressure in the energy storage mechanism is too high, some of the oil is returned through two pressure relief valves to release the pressure.

[0021] Furthermore, the pressure relief valve is a one-way valve.

[0022] The advantage of adopting the above-mentioned further solution is that it is more reasonable to use a one-way valve for the pressure relief valve, as the one-way valve ensures unidirectional flow of oil.

[0023] Furthermore, the oil control valve assembly includes a second solenoid valve, the oil inlet P, the oil return port T, and the oil outlet are located on the second solenoid valve, and the oil outlet is connected to a pipeline that connects the two filling check valves and one end of the throttle valve through a pipeline.

[0024] The beneficial effect of adopting the above-mentioned further solution is that during the operation, by changing the position of the second valve core of the solenoid valve, oil supply and return can be realized, which is convenient and facilitates operation.

[0025] Furthermore, the oil control valve assembly also includes a solenoid valve three, which has an oil port three and an oil port four that are interconnected. The oil port three is connected to the oil outlet, and the oil port four is connected to a pipeline between the two filling check valves and one end of the throttle valve through a pipeline.

[0026] The advantage of adopting the above-mentioned further solution is that by changing the three valve cores of the solenoid valve, the flow direction of the oil can be changed, thereby realizing oil supply and return, which is convenient for operation.

[0027] Furthermore, the oil control valve assembly also includes a feedback check valve, one end of which is connected to a pipeline between the oil outlet and the oil port three via a pipeline.

[0028] The beneficial effect of adopting the above-mentioned further solution is that during operation, the load signal is fed back to the LS port of the variable pump via a one-way valve, so as to control the pump's displacement according to the specific situation, and the liquid supply is convenient.

[0029] Furthermore, the energy storage mechanism includes two energy storage units, which are respectively connected to the two interfaces via pipelines.

[0030] The beneficial effect of adopting the above-mentioned further solution is that during vehicle operation, in automatic mode, the vehicle is in a stable driving state, the two accumulators are filled with oil, and the two accumulators use two hydraulic cylinder control valve groups to supply fluid to the two hydraulic cylinders, ensuring that the two hydraulic cylinders operate smoothly.

[0031] Furthermore, the oil inlet P is connected to one end of the oil supply pipeline, and a throttle valve is fixedly installed on the oil supply pipeline.

[0032] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and uses throttle valve two to control the amount of oil supplied, thus saving costs.

[0033] This utility model also relates to a tractor, including the suspended cab hydraulic system described above.

[0034] The beneficial effect of adopting the above-mentioned further solutions is that this utility model also provides a tractor with a compact structure, a hydraulically suspended cab, semi-active shock absorption, and good comfort. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the automatic mode in this utility model;

[0036] Figure 2 This is a schematic diagram of the manual mode ascent in this utility model;

[0037] Figure 3 This is a schematic diagram of the manual mode descent in this utility model.

[0038] The attached diagram lists the components represented by each number as follows:

[0039] 1. Solenoid valve 2; 2. Solenoid valve 3; 3. Throttle valve 1; 4. Filling check valve; 5. Hydraulic cylinder; 6. Solenoid valve 1; 7. Accumulator; 8. Feedback check valve; 9. Pressure relief valve; 10. Throttle valve 2; 11. Displacement sensor. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] 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.

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Example 1

[0045] like Figures 1 to 3 As shown, this embodiment provides a hydraulic system for a suspended cab, including an oil control valve group, two hydraulic cylinder control valve groups, two hydraulic cylinders 5 and an energy storage mechanism. The oil control valve group is provided with an oil inlet P, an oil return port T and an oil outlet. The oil outlet is connected to the oil inlet P or the oil return port T.

[0046] The two hydraulic cylinder control valve groups are respectively provided with an interconnected interface 1 and a lower cavity interface, an interconnected interface 2 and an upper cavity interface, and an interface 3. Each interface 3 can be connected to the connection between the corresponding interface 1 and the lower cavity interface.

[0047] The lower chambers of the two hydraulic cylinders 5 are respectively connected to the two lower chamber interfaces through pipelines, and their upper chambers are respectively connected to the upper chamber interfaces through pipe openings; the energy storage mechanism is respectively connected to the two interfaces through pipelines.

[0048] During vehicle operation, in automatic mode, the vehicle is in a stable driving state. The energy storage mechanism is filled with oil. The energy storage mechanism uses two hydraulic cylinder control valve groups to supply oil to the two hydraulic cylinders 5, ensuring that the two hydraulic cylinders 5 can operate smoothly.

[0049] In manual mode, the oil enters through the oil inlet P, and then passes through the control valve group of the two hydraulic cylinders to enter the lower chamber of the two hydraulic cylinders, so as to extend the two hydraulic cylinders 5 and thus raise the seat.

[0050] In addition, the oil in the lower chambers of the two hydraulic cylinders 5 flows back to the return port T through the two hydraulic cylinder control valve groups to achieve the contraction of the two hydraulic cylinders 5, thereby lowering the seat.

[0051] It should be noted that the two hydraulic cylinders 5 mentioned above use existing technology, and their specific structures and principles will not be elaborated here.

[0052] This embodiment features a compact structure and provides a hydraulically suspended cab with semi-active shock absorption, resulting in good comfort.

[0053] Example 2

[0054] Based on Embodiment 1, in this embodiment, each hydraulic cylinder control valve group includes a solenoid valve 6, a filling check valve 4, and a throttle valve 3. The filling check valve 4 and the throttle valve 3 are distributed in parallel, with one end connected to the oil outlet through a pipeline, and the other end connected to the lower chamber of the corresponding hydraulic cylinder 5 through a pipeline.

[0055] The solenoid valve 6 is provided with an oil port 1 and an oil port 2 that are connected or disconnected. The oil port 1 is connected to the filling check valve 4 and the other end of the throttle valve 3 through a pipeline that connects to the lower chamber of the hydraulic cylinder 5. The oil port 2 is connected to the energy storage mechanism through a pipeline. The telescopic rods of the two hydraulic cylinders 5 are respectively connected to displacement sensors 11.

[0056] During vehicle operation, in automatic mode, the vehicle is in a stable driving state. The energy storage mechanism is filled with oil. The energy storage mechanism uses two solenoid valves 6 to supply oil to the two hydraulic cylinders 5, ensuring that the two hydraulic cylinders 5 can operate smoothly.

[0057] In manual mode, the oil enters through the oil inlet P, and then passes through two throttle valves 3 to enter the lower chambers of the two hydraulic cylinders 5. At the same time, the accumulator is charged with fluid to extend the two hydraulic cylinders 5, thereby raising the seat.

[0058] In addition, the oil in the lower chambers of the two hydraulic cylinders 5 flows back to the return port T through two filling check valves 4, so as to realize the contraction of the two hydraulic cylinders 5, thereby realizing the lowering of the seat.

[0059] Preferably, in this embodiment, the solenoid valve 6 is a two-position two-way valve.

[0060] Preferably, in this embodiment, the extension rods of the two hydraulic cylinders 5 are respectively connected to displacement sensors 11. During vehicle operation, the displacement sensors 11 detect the displacement of the hydraulic cylinders 5, which is converted into a current signal. The controller controls the opening of the solenoid valve 6 based on the current signal, thereby controlling the amount of oil entering and exiting.

[0061] Example 3

[0062] Based on Embodiment 2, in this embodiment, each hydraulic cylinder control valve group further includes a pressure relief valve 9. The two ports on the pressure relief valve 9 are respectively connected to the pipeline between the energy storage mechanism and the second oil port, and to the pipeline between the other end of the filling check valve 4 and the first throttle valve 3 and the lower chamber of the hydraulic cylinder.

[0063] The scheme has a simple structure and reasonable design. When the pressure inside the energy storage mechanism is too high, some of the oil is returned through two pressure relief valves 9 to release the pressure.

[0064] Example 4

[0065] Based on Example 3, in this example, the pressure relief valve 9 is a one-way valve.

[0066] It is more reasonable to use a one-way valve for pressure relief valve 9, as the one-way valve ensures that the oil flows in one direction.

[0067] Example 5

[0068] Based on any one of Embodiments 2 to 4, in this embodiment, the oil control valve group includes a second solenoid valve 1, the oil inlet P, the oil return port T and the oil outlet are located on the second solenoid valve 1, and the oil outlet is connected to a pipeline that connects the two filling check valves 4 and one end of the throttle valve 3 through a pipeline.

[0069] During operation, the oil supply and return can be achieved by changing the position of the valve core of solenoid valve 21, which is convenient for switching and operation.

[0070] Preferably, in this embodiment, the solenoid valve 1 is a two-position three-way valve.

[0071] Example 6

[0072] Based on Embodiment 5, in this embodiment, the oil control valve group further includes a solenoid valve 3 2. The solenoid valve 3 2 is provided with an oil port 3 and an oil port 4 that are interconnected. The oil port 3 is connected to the oil outlet, and the oil port 4 is connected to a pipeline between the two filling check valves 4 and one end of the throttle valve 3 through a pipeline.

[0073] This solution utilizes the change of the valve core of solenoid valve 32 to change the direction of oil flow, thereby achieving oil supply and return, which is convenient for operation.

[0074] Example 7

[0075] Based on Embodiment 6, in this embodiment, the oil control valve group further includes a feedback check valve 8, one end of which is connected to the pipeline between the oil outlet and the oil port 3 via a pipeline.

[0076] During operation, the load signal is fed back to the variable pump LS port via the feedback check valve 8, so as to control the pump displacement according to the specific situation and facilitate liquid supply.

[0077] Example 8

[0078] Based on the above embodiments, in this embodiment, the energy storage mechanism includes two energy storage devices 7, and the two energy storage devices 7 are respectively connected to the two interfaces through pipelines.

[0079] During vehicle operation, in automatic mode, the vehicle is in a stable driving state. The two accumulators 7 are filled with oil, and the two accumulators 7 use the two hydraulic cylinder control valve groups to supply oil to the two hydraulic cylinders 5, ensuring that the two hydraulic cylinders 5 can operate smoothly.

[0080] It should be noted that the two accumulators 7 mentioned above use existing technologies, and their specific structures and principles will not be elaborated here.

[0081] Example 9

[0082] Based on the above embodiments, in this embodiment, the oil inlet P is connected to one end of the oil supply pipeline, and a throttle valve 10 is fixedly installed on the oil supply pipeline.

[0083] The solution has a simple structure and reasonable design. It uses throttle valve 210 to control the amount of oil supplied, thus saving costs.

[0084] Example 10

[0085] Based on the above embodiments, this embodiment also provides a tractor, including the suspended cab hydraulic system as described above.

[0086] This embodiment also provides a tractor with a compact structure, a hydraulically suspended cab, semi-active shock absorption, and good comfort.

[0087] The working principle of this utility model is as follows:

[0088] During vehicle operation, in automatic mode, the vehicle is in a stable driving state. The energy storage mechanism is filled with oil. The energy storage mechanism uses two solenoid valves 6 to supply oil to the two hydraulic cylinders 5, ensuring that the two hydraulic cylinders 5 can operate smoothly.

[0089] In manual mode, the oil enters through the oil inlet P, and then passes through two throttle valves 3 to enter the lower chambers of the two hydraulic cylinders 5. At the same time, the two accumulators 7 are charged to extend the two hydraulic cylinders 5, thereby raising the seat.

[0090] In addition, the oil in the lower chambers of the two hydraulic cylinders 5 flows back to the return port T through two filling check valves 4, so as to realize the contraction of the two hydraulic cylinders 5, thereby realizing the lowering of the seat.

[0091] It should be noted that the letters in the attached diagram are merely abbreviations for oil ports or components and have no other substantive meaning; at the same time, the bold lines in the attached diagram represent the path of oil flow.

[0092] In addition, all electronic components involved in this utility model adopt existing technology, and all the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is existing technology.

[0093] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0094] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0095] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic system for a suspended cab, characterized in that: It includes an oil control valve group, two hydraulic cylinder control valve groups, two hydraulic cylinders (5) and an energy storage mechanism. The oil control valve group is provided with an oil inlet P, an oil return port T and an oil outlet. The oil outlet is connected to the oil inlet P or the oil return port T. The two hydraulic cylinder control valve groups are respectively provided with an interconnected interface 1 and a lower cavity interface, an interconnected interface 2 and an upper cavity interface, and an interface 3. Each interface 3 can be connected to the connection between the corresponding interface 1 and the lower cavity interface. The lower chambers of the two hydraulic cylinders (5) are respectively connected to the two lower chamber interfaces through pipelines, and their upper chambers are respectively connected to the upper chamber interfaces through pipe openings; the energy storage mechanism is respectively connected to the two interfaces through pipelines.

2. The hydraulic system for the suspended cab according to claim 1, characterized in that: Each of the hydraulic cylinder control valve groups includes a solenoid valve (6), a filling check valve (4), and a throttle valve (3). The filling check valve (4) and the throttle valve (3) are connected in parallel. One end of the valve is connected to the oil outlet through a pipeline, and the other end of the valve is connected to the lower chamber of the corresponding hydraulic cylinder (5) through a pipeline. The solenoid valve (6) is provided with oil port 1 and oil port 2 that are connected or disconnected. Oil port 1 is connected to the filling check valve (4) and the other end of the throttle valve (3) is connected to the lower chamber of the hydraulic cylinder (5) through a pipeline. Oil port 2 is connected to the energy storage mechanism through a pipeline. The telescopic rods of the two hydraulic cylinders (5) are respectively connected to displacement sensors (11).

3. The hydraulic system for the suspended cab according to claim 2, characterized in that: Each of the hydraulic cylinder control valve groups also includes a pressure relief valve (9), the two ports on the pressure relief valve (9) are respectively connected to the energy storage mechanism and the second oil port through a pipeline, and the other end of the filling check valve (4) and the throttle valve (3) are connected to the lower chamber of the hydraulic cylinder through a pipeline.

4. The hydraulic system for the suspended cab according to claim 3, characterized in that: The pressure relief valve (9) is a one-way valve.

5. The hydraulic system for the suspended cab according to claim 2, characterized in that: The oil control valve group includes a second solenoid valve (1), the oil inlet P, the oil return port T and the oil outlet are located on the second solenoid valve (1), and the oil outlet is connected to the pipeline between the two filling check valves (4) and one end of the throttle valve (3) through a pipeline.

6. The hydraulic system for the suspended cab according to claim 5, characterized in that: The oil control valve group also includes a solenoid valve three (2), which has an oil port three and an oil port four that are connected to each other. The oil port three is connected to the oil outlet, and the oil port four is connected to the pipeline between the two filling check valves (4) and one end of the throttle valve one (3) through a pipeline.

7. The hydraulic system for the suspended cab according to claim 6, characterized in that: The oil control valve group also includes a feedback check valve (8), one end of which is connected to the pipeline between the oil outlet and the oil port three via a pipeline.

8. The hydraulic system for the suspended cab according to any one of claims 1-7, characterized in that: The energy storage mechanism includes two energy storage units (7), and the two energy storage units (7) are respectively connected to the two interfaces through pipelines.

9. The hydraulic system for the suspended cab according to any one of claims 1-7, characterized in that: The oil inlet P is connected to one end of the oil supply pipeline, and a throttle valve (10) is fixedly installed on the oil supply pipeline.

10. A tractor, characterized in that: Includes the suspended cab hydraulic system as described in any one of claims 1-9.

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