Hydraulic system and agricultural machine

Abstract

The utility model provides a hydraulic system which is used on agricultural machinery, the hydraulic system comprises an oil pump, a multi-way valve, a first oil cylinder and a second oil cylinder, one end of the multi-way valve is communicated with one end of the oil pump, and the first oil cylinder and the second oil cylinder are respectively communicated with the multi-way valve; the multi-way valve comprises a first electromagnetic valve and a second electromagnetic valve which can be communicated with each other, and an operating device is arranged at one end of the first electromagnetic valve and one end of the second electromagnetic valve and used for controlling working positions of the first electromagnetic valve and the second electromagnetic valve. For example, the hydraulic system with the structure is applied to the rotary cultivator, when the operating device is operated, the working positions of the first electromagnetic valve and the second electromagnetic valve can be changed, and the rotary tillage depth can be adjusted, so that the hydraulic system is simple in structure and convenient to operate. In addition, the utility model further provides an agricultural machine comprising the hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to a hydraulic system and agricultural machinery. Background Technology

[0002] In recent years, with the continuous development of the economy, agricultural machinery of various structures, such as tractors and rotary tillers, has been increasingly widely used in agricultural production activities.

[0003] Currently, widely used rotary tillers are typically mounted at the rear of tractors and driven by them. During tilling, the tiller's own weight is used to till the farmland or soil. Rotary tillers are sometimes used for tilling farmland and sometimes for tilling dry land, therefore, their tilling depth needs to be adjusted in real time. However, current rotary tillers usually cannot adjust the tilling depth, or the adjustment is cumbersome, time-consuming, and labor-intensive, thus affecting the widespread use of rotary tillers.

[0004] In summary, how to provide a hydraulic system that is simple in structure, easy to operate, and can adjust the rotary tillage depth in real time as needed, as well as agricultural machinery including this hydraulic system, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a hydraulic system with simple structure, convenient operation, and real-time adjustable rotary tillage depth, as well as agricultural machinery including this hydraulic system.

[0006] The solution of this utility model is implemented as follows: This utility model proposes a hydraulic system for agricultural machinery. The hydraulic system includes an oil pump, a multi-way valve, a first oil cylinder, and a second oil cylinder. One end of the multi-way valve is connected to one end of the oil pump, and the first and second oil cylinders are respectively connected to the multi-way valve. The multi-way valve includes a first solenoid valve and a second solenoid valve that are interconnected. One end of the first and second solenoid valves is provided with an operating device, which is used to control the working position of the first and second solenoid valves. Taking this hydraulic system structure as an example for use on a rotary tiller, when the operating device is operated, the working position of the first and second solenoid valves can be changed, thereby adjusting the tillage depth. Therefore, it is not only simple in structure but also relatively convenient to operate.

[0007] Another technical solution of this utility model is that, based on the above, both the first solenoid valve and the second solenoid valve are three-position four-way solenoid directional valves.

[0008] Another technical solution of this utility model is that, based on the above, the operating device includes a first handle, which is disposed at one end of the first solenoid valve.

[0009] Another technical solution of this utility model is that, based on the above, the operating device further includes a second handle, which is disposed at one end of the second solenoid valve.

[0010] Another technical solution of this utility model is that, based on the above, the first oil cylinder is a one-way oil cylinder, and the rodless chamber of the first oil cylinder can be connected to the first solenoid valve or the second solenoid valve.

[0011] Another technical solution of this utility model is that, based on the above, the second oil cylinder is a bidirectional oil cylinder, and the second oil cylinder can be connected to the first solenoid valve.

[0012] Another technical solution of this utility model is that, based on the above, the hydraulic system further includes a shut-off valve, one end of which is connected to the rod chamber of the second oil cylinder.

[0013] Another technical solution of this utility model is that, based on the above, the hydraulic system further includes an oil tank, the other end of the shut-off valve is connected to the oil tank, the oil pump is a gear pump, and the end of the gear pump away from the multi-way valve is connected to the oil tank.

[0014] Another technical solution of this utility model is that, based on the above, the multi-way valve further includes an overflow valve, which is connected to the first solenoid valve and the second solenoid valve respectively.

[0015] In addition, this utility model also proposes an agricultural machine, including a hydraulic system, which is the hydraulic system described above. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a schematic diagram of the structure of a hydraulic system according to the present invention.

[0018] The correspondence between the attached figures is as follows:

[0019] 1. Oil tank 2. Filter 3. Gear pump

[0020] 4. Multi-way valve; 5. First hydraulic cylinder; 6. Second hydraulic cylinder

[0021] 7. Shut-off valve; 8. First solenoid valve; 9. First handle.

[0022] 10 Second solenoid valve 11 Second handle 12 Relief valve Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings. This description is merely illustrative and explanatory, and should not be construed as limiting the scope of protection of the present invention. Furthermore, those skilled in the art can combine the features in the embodiments described herein and in different embodiments according to the description in this document.

[0024] The embodiments of this utility model are as follows, please refer to them. Figure 1 The hydraulic system shown is used in agricultural machinery and specifically includes an oil pump, a multi-way valve 4, a first cylinder 5, and a second cylinder 6. One end of the multi-way valve 4 (the lower end shown in the figure) is connected to one end of the oil pump (the upper end shown in the figure). The first cylinder 5 and the second cylinder 6 are respectively connected to the multi-way valve 4. The multi-way valve 4 specifically includes a first solenoid valve 8 and a second solenoid valve 10 that are interconnected. One end of the first solenoid valve 8 and the second solenoid valve 10 (the left end shown in the figure) is also equipped with an operating device. The operating device is used to control the working positions of the first solenoid valve 8 and the second solenoid valve 10; that is, the working positions of the first solenoid valve 8 and the second solenoid valve 10 can be switched in real time as needed. Taking this hydraulic system on a rotary tiller as an example, when the operating device is operated, the working positions of the first solenoid valve 8 and the second solenoid valve 10 can be changed to adjust the tillage depth. Therefore, it is not only simple in structure but also relatively convenient to operate.

[0025] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, both the first solenoid valve 8 and the second solenoid valve 10 are preferably three-position four-way solenoid directional valves.

[0026] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the control device specifically includes a first handle 9, which is located at one end of the first solenoid valve 8, i.e., the left end shown in the figure.

[0027] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the operating device also includes a second handle 11, which is located at one end of the second solenoid valve 10, i.e., the left end shown in the figure.

[0028] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the first hydraulic cylinder 5 is preferably a one-way hydraulic cylinder. The first hydraulic cylinder 5 includes a rodless chamber, which can be connected to the first solenoid valve 8 or the second solenoid valve 10.

[0029] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1As shown, the second cylinder 6 is preferably a bidirectional cylinder. The second cylinder 6 includes a rod chamber and a rodless chamber, and its rod chamber and rodless chamber can be connected to the first solenoid valve 8.

[0030] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the hydraulic system also includes a shut-off valve 7, one end of which, as shown in the figure, is connected to the rod chamber of the second cylinder 6.

[0031] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the hydraulic system also includes an oil tank 1. The other end of the shut-off valve 7, i.e., the lower end shown in the figure, is connected to the oil tank 1. The oil pump is preferably a gear pump 3, with one end of the gear pump 3 away from the multi-way valve 4, i.e., the lower end shown in the figure, connected to the oil tank 1. More specifically, the hydraulic system also includes a filter 2, which is located between the oil pump and the oil tank. One end of the filter 2 is connected to the oil pump, and the other end is connected to the oil tank 1. When the oil pump is working, the oil in the oil tank 1 is filtered by the filter 2 and then enters the oil pump's inlet.

[0032] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the multi-way valve 4 also includes a relief valve 12, which is connected to the first solenoid valve 8 and the second solenoid valve 10 respectively. During operation, when the hydraulic system oil is over-pressurized, the relief valve 12 opens and the oil flows back to the oil tank 1, which plays the role of timely relief.

[0033] Taking the hydraulic system of this structure as an example for use on a rotary tiller, when the control device is operated, the working position of the first solenoid valve 8 and the second solenoid valve 10 can be changed to adjust the rotary tillage depth. Therefore, it is not only simple in structure, but also relatively easy to operate.

[0034] Furthermore, this utility model also proposes an agricultural machine, which includes a hydraulic system, as described above. Specifically, the agricultural machine is a tractor, with a detachable rotary tiller mounted at one end.

[0035] Agricultural machinery with this structure, correspondingly, possesses the advantages of the aforementioned hydraulic system.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A hydraulic system for use in agricultural machinery, characterized in that, The hydraulic system includes an oil pump, a multi-way valve, a first oil cylinder, and a second oil cylinder. One end of the multi-way valve is connected to one end of the oil pump, and the first oil cylinder and the second oil cylinder are respectively connected to the multi-way valve. The multi-way valve includes a first solenoid valve and a second solenoid valve that can be interconnected. One end of the first solenoid valve and the second solenoid valve is provided with an operating device, which is used to control the working position of the first solenoid valve and the second solenoid valve.

2. The hydraulic system according to claim 1, characterized in that, Both the first and second solenoid valves are three-position four-way solenoid directional valves.

3. The hydraulic system according to claim 2, characterized in that, The operating device includes a first handle, which is disposed at one end of the first solenoid valve.

4. The hydraulic system according to claim 3, characterized in that, The operating device further includes a second handle, which is disposed at one end of the second solenoid valve.

5. The hydraulic system according to claim 4, characterized in that, The first hydraulic cylinder is a one-way hydraulic cylinder, and the rodless chamber of the first hydraulic cylinder can be connected to the first solenoid valve or the second solenoid valve.

6. The hydraulic system according to claim 5, characterized in that, The second hydraulic cylinder is a two-way hydraulic cylinder, and the second hydraulic cylinder can be connected to the first solenoid valve.

7. The hydraulic system according to claim 6, characterized in that, The hydraulic system also includes a shut-off valve, one end of which is connected to the rod chamber of the second cylinder.

8. The hydraulic system according to claim 7, characterized in that, The hydraulic system also includes an oil tank, the other end of the shut-off valve is connected to the oil tank, the oil pump is a gear pump, and the end of the gear pump opposite to the multi-way valve is connected to the oil tank.

9. The hydraulic system according to claim 8, characterized in that, The multi-way valve also includes an overflow valve, which is connected to the first solenoid valve and the second solenoid valve respectively.

10. An agricultural machine, comprising a hydraulic system, characterized in that, The hydraulic system is the hydraulic system according to any one of claims 1 to 9.

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