Hydraulic system and tractor

Abstract

The utility model provides a hydraulic system which is used on a tractor and comprises an oil tank, a hydraulic pump, a reversing valve, a plurality of pipelines and a plurality of oil cylinders, one end of the hydraulic pump is communicated with the oil tank through the pipelines, and the other end of the hydraulic pump is communicated with one end of the reversing valve through the pipelines. The other end of the reversing valve is connected with the oil cylinder through a pipeline; the hydraulic system further comprises a flow distributing and collecting device, and the flow distributing and collecting device is arranged on a pipeline between the reversing valve and the oil cylinder. According to the hydraulic system of the structure, when the left position of the reversing valve works, oil from the oil tank enters the multiple oil cylinders after passing through the hydraulic pump, the left position of the reversing valve and the flow distributing and collecting device, and even if the loads of the multiple oil cylinders are different, the consistency of the amount of oil entering the multiple oil cylinders can be effectively guaranteed; therefore, the action synchronism of the oil cylinders is ensured, and the working efficiency and the safety are effectively improved. In addition, the utility model further provides a tractor.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, and particularly to a hydraulic system and a tractor. Background Art

[0002] Recently, with the continuous development of economy and technology, various structures of agricultural machinery, such as tractors, are more and more widely used in agricultural production activities.

[0003] The hydraulic system of a tractor usually includes an oil tank, an oil pump and multiple oil cylinders. When the oil pump works, it transports the hydraulic oil in the oil tank to the rod chamber or the non-rod chamber of multiple oil cylinders, so as to drive multiple oil cylinders to act synchronously. However, when multiple oil cylinders all bear loads, the extension speeds of two oil cylinders often are inconsistent, thus affecting the working efficiency and safety of the tractor.

[0004] In summary, how to provide a hydraulic system with better synchronization of multiple oil cylinders, higher working efficiency and better safety, as well as a tractor including this hydraulic system, has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: to provide a hydraulic system with better synchronization of multiple oil cylinders, higher working efficiency and better safety, as well as a tractor including this hydraulic system.

[0006] The solution of the utility model is realized as follows: The utility model provides a hydraulic system for a tractor, which includes an oil tank, a hydraulic pump, a directional control valve, several pipelines, and several oil cylinders. One end of the hydraulic pump is connected to the oil tank through a pipeline, the other end of the hydraulic pump is connected to one end of the directional control valve through a pipeline, and the other end of the directional control valve is connected to the oil cylinder through a pipeline; the hydraulic system further includes a flow dividing and collecting device, and the flow dividing and collecting device is arranged on the pipeline between the directional control valve and the oil cylinder. For the hydraulic system with this structure, when the left position of the directional control valve works, the oil fluid from the oil tank enters several oil cylinders through the hydraulic pump, the left position of the directional control valve, and the flow dividing and collecting device. Even when the loads of several oil cylinders are different, through the flow dividing and collecting device, the consistency of the oil volume entering several oil cylinders can be effectively guaranteed, thereby ensuring the synchronization of the actions of several oil cylinders, and effectively improving the working efficiency and safety.

[0007] Another technical solution of the utility model is based on the above, the oil cylinder includes a first oil cylinder and a second oil cylinder, and the flow dividing and collecting device is respectively connected to the first oil cylinder and the second oil cylinder.

[0008] Another technical solution of the utility model is based on the above, the flow dividing and collecting device is a flow dividing and collecting valve.

[0009] Another technical solution of the present utility model is that on the basis of the above, the first oil cylinder includes a first rodless cavity, and a first one-way valve is provided on the pipeline between the reversing valve and the first rodless cavity.

[0010] Another technical solution of the present utility model is that on the basis of the above, the second oil cylinder includes a second rodless cavity, and a second one-way valve is provided on the pipeline between the reversing valve and the second rodless cavity.

[0011] Another technical solution of the present utility model is that on the basis of the above, the reversing valve is a two-position four-way electromagnetic reversing valve.

[0012] Another technical solution of the present utility model is that on the basis of the above, the hydraulic system further includes a relief valve. The hydraulic pump includes an oil inlet end and an oil outlet end. One end of the relief valve is communicated with the outlet end, and the other end is communicated with the fuel tank.

[0013] Another technical solution of the present utility model is that on the basis of the above, the hydraulic system further includes a filter. One end of the filter is communicated with the fuel tank, and the other end is communicated with the oil inlet end.

[0014] Another technical solution of the present utility model is that on the basis of the above, the hydraulic pump is a variable pump.

[0015] In addition, the present utility model also provides a tractor, including a hydraulic system, and the hydraulic system is the hydraulic system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0017] Figure 1 FIG. is a schematic structural diagram of a hydraulic system of the present utility model;

[0018] Figure 2 is Figure 1 a schematic structural diagram when the reversing valve of the hydraulic system in FIG. is in the right position for operation.

[0019] The corresponding relationship of the reference numerals is as follows:

[0020] 1 fuel tank, 2 filter, 3 hydraulic pump

[0021] 4 relief valve, 5 reversing valve, 6 flow dividing and collecting valve

[0022] 7 first one-way valve, 8 first oil cylinder, 9 second oil cylinder

[0023] 10 second one-way valve, 11 pipeline Detailed implementation manners

[0024] The following describes the present utility model in detail with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and shall not have any restrictive effect on the protection scope of the present utility model. In addition, those skilled in the art can make corresponding combinations of the features in the embodiments and different embodiments in this document according to the description of this document.

[0025] The embodiments of the present utility model are as follows. Please refer to Figure 1 and Figure 2 The hydraulic system shown is used on a tractor. The hydraulic system specifically includes an oil tank 1, a hydraulic pump 3, a reversing valve 5, several pipelines 11, and several cylinders. One end of the hydraulic pump 3, that is, the lower end shown in the figure, is connected to the oil tank 1 through the pipeline 11. The other end of the hydraulic pump 3, that is, the upper end shown in the figure, is connected to one end of the reversing valve 5, that is, the lower end shown in the figure, through the pipeline 11. The other end of the reversing valve 5, that is, the lower end shown in the figure, is connected to the cylinders through the pipeline 11. The hydraulic system further includes a flow dividing and collecting device, and the flow dividing and collecting device is arranged on the pipeline 11 between the reversing valve 5 and the cylinders. For the hydraulic system with this structure, when the left position of the reversing valve 5 works, the oil fluid from the oil tank 1 enters several cylinders after passing through the hydraulic pump 3, the left position of the reversing valve 5, and the flow dividing and collecting device. Even when the loads of several cylinders are different, through the flow dividing and collecting device, the consistency of the oil quantity entering several cylinders can be effectively ensured, thereby ensuring the synchronism of the actions of several cylinders, and effectively improving the working efficiency and safety. Generally, it has the advantages of better synchronism of multiple cylinders, higher working efficiency, and better safety.

[0026] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, for the cylinders, it specifically includes a first cylinder 8 and a second cylinder 9. The flow dividing and collecting device is respectively connected to the first cylinder 8 and the second cylinder 9, that is, the flow dividing and collecting device supplies oil to the first cylinder 8 and the second cylinder 9 simultaneously to improve the synchronism of the first cylinder 8 and the second cylinder 9.

[0027] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, for the flow dividing and collecting device, it is preferably a flow dividing and collecting valve. It should be noted that for the specific structure of the flow dividing and collecting valve 6, reference can be made to existing and improved technologies, and details are not described herein again.

[0028] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2As shown, the first oil cylinder 8 specifically includes a cylinder barrel, the cylinder barrel is provided with a rod chamber and a first rodless chamber, and a first one-way valve 7 is provided on the pipeline 11 between the reversing valve 5 and the first rodless chamber.

[0029] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, the second oil cylinder 9 has the same structure as the first oil cylinder 8, and specifically includes a cylinder barrel, the cylinder barrel is provided with a rod chamber and a second rodless chamber, and a second one-way valve 10 is provided on the pipeline 11 between the reversing valve 5 and the second rodless chamber. The second one-way valve 10 has the same or similar structure as the first one-way valve 7.

[0030] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, for the reversing valve 5, it is preferably a two-position four-way electromagnetic reversing valve.

[0031] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, the hydraulic system further includes a relief valve 4. The hydraulic pump 3 includes an oil inlet end at its lower end and an oil outlet end at its upper end. One end of the relief valve 4 is communicated with the outlet end through the pipeline 11, and the other end is communicated with the fuel tank 1 through the pipeline 11.

[0032] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, the hydraulic system further includes a filter 2. One end of the filter 2, that is, the lower end shown in the figure, is communicated with the fuel tank 1, and the other end of the filter 2, that is, the upper end shown in the figure, is communicated with the oil inlet end. Through the filter 2, the hydraulic oil entering the hydraulic system can be effectively filtered to prevent impurities from entering the hydraulic system and causing blockage.

[0033] On the basis of the above embodiment, in another embodiment of the present utility model, as Figure 1 and Figure 2 shown, for the hydraulic pump 3, it is preferably a variable pump.

[0034] For the hydraulic system with the above structure, as Figure 1 shown, when the left position of the reversing valve 5 works, the hydraulic oil enters the left position of the reversing valve 5 through the hydraulic pump 3, and then after passing through the flow dividing and collecting valve 6, it evenly enters the first rodless chamber and the second rodless chamber respectively. At this time, the first oil cylinder 8 and the second oil cylinder 9 extend simultaneously, and since the amount of oil entering the first rodless chamber and the second rodless chamber is the same, therefore, the synchronism of the first oil cylinder 8 and the second oil cylinder 9 can be ensured.

[0035] As Figure 2As shown, when the right position of the reversing valve 5 is working, the hydraulic oil enters the right position of the reversing valve 5 through the hydraulic pump 3 and enters the rod chambers of the first oil cylinder 8 and the second oil cylinder 9 respectively, that is, it no longer passes through the flow dividing and collecting valve 6. At this time, the first oil cylinder 8 and the second oil cylinder 9 retract.

[0036] Generally speaking, the hydraulic system with the above structure has the advantages of better synchronization of multiple oil cylinders, higher working efficiency, and better safety.

[0037] On the other hand, the present invention also proposes a tractor including a hydraulic system, and the hydraulic system is the hydraulic system as described above. The tractor with this structure correspondingly has the advantages of the above hydraulic system.

[0038] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic system for use on a tractor, characterized in that, It includes an oil tank, a hydraulic pump, a directional control valve, several pipelines, and several cylinders. One end of the hydraulic pump is connected to the oil tank through a pipeline, the other end of the hydraulic pump is connected to one end of the directional control valve through a pipeline, and the other end of the directional control valve is connected to the cylinders through a pipeline; The hydraulic system further includes a flow dividing and collecting device, and the flow dividing and collecting device is arranged on the pipeline between the directional control valve and the cylinders.

2. The hydraulic system according to claim 1, characterized in that, The cylinders include a first cylinder and a second cylinder, and the flow dividing and collecting device is respectively connected to the first cylinder and the second cylinder.

3. The hydraulic system according to claim 2, wherein, The flow dividing and collecting device is a flow dividing and collecting valve.

4. The hydraulic system according to claim 3, wherein The first cylinder includes a first rodless chamber, and a first one-way valve is arranged on the pipeline between the directional control valve and the first rodless chamber.

5. The hydraulic system according to claim 4, characterized in that The second cylinder includes a second rodless chamber, and a second one-way valve is arranged on the pipeline between the directional control valve and the second rodless chamber.

6. The hydraulic system according to claim 5, wherein, The directional control valve is a two-position four-way electromagnetic directional control valve.

7. The hydraulic system according to claim 6, characterized in that, The hydraulic system further includes a relief valve. The hydraulic pump includes an oil inlet end and an oil outlet end. One end of the relief valve is connected to the oil outlet end, and the other end is connected to the oil tank.

8. The hydraulic system according to claim 7, characterized in that, The hydraulic system further includes a filter. One end of the filter is connected to the oil tank, and the other end is connected to the oil inlet end.

9. The hydraulic system according to claim 8, characterized in that, The hydraulic pump is a variable pump.

10. A tractor, 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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