Hydraulic control valve and tractor

Abstract

The utility model provides a hydraulic control valve and a tractor. The utility model relates to a hydraulic control valve, which comprises a valve body, a first oil cylinder oil passing port, a second oil cylinder oil passing port, a first middle gear oil outlet, a second middle gear oil outlet and an oil cylinder piston, the first oil cylinder oil passing port, the second oil cylinder oil passing port, the first middle baffle oil outlet and the second middle baffle oil outlet are all installed on the valve body, and the first oil cylinder oil passing port, the second oil cylinder oil passing port, the first middle baffle oil outlet and the second middle baffle oil outlet are all connected with the oil cylinder. The oil cylinder piston is installed in the oil cylinder in a sliding mode.

Description

Technical Field

[0001] This utility model relates to the field of gear shifting equipment technology, and in particular to a hydraulic control valve and a tractor. Background Technology

[0002] With the rapid development of electronic control technology, tractor transmission routes have more options. Gear shifting can be electronic or hydraulic, but hydraulic systems can only switch between two gears and cannot achieve neutral, which limits the choice of transmission routes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a hydraulic control valve and a tractor, addressing the shortcomings of the existing technology.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A hydraulic control valve includes: a valve body, a first oil cylinder inlet, a second oil cylinder inlet, a first intermediate stop outlet, a second intermediate stop outlet, and an oil cylinder piston. The valve body is provided with an oil cylinder. The first oil cylinder inlet, the second oil cylinder inlet, the first intermediate stop outlet, and the second intermediate stop outlet are all installed on the valve body. The first oil cylinder inlet, the second oil cylinder inlet, the first intermediate stop outlet, and the second intermediate stop outlet are all connected to the oil cylinder. The oil cylinder piston is slidably installed in the oil cylinder.

[0005] The beneficial effects of adopting this utility model's technical solution are as follows: By setting a first intermediate oil outlet and a second intermediate oil outlet, the two chambers of the hydraulic control valve are opened, realizing the control logic of three gears. Combined with the synchronizer shifting mechanism, it enables the switching of gears on current tractors, facilitating the control of models with power shift functionality. It also facilitates the realization of neutral mode and expands the range of transmission route selection.

[0006] Furthermore, the first oil cylinder inlet and the second oil cylinder inlet are respectively located on both sides of the front end of the valve body, and the first intermediate baffle outlet and the second intermediate baffle outlet are respectively located on both sides of the top of the valve body.

[0007] The beneficial effects of adopting the above-mentioned further technical solution are: the position design of the first oil cylinder inlet, the second oil cylinder inlet, the first intermediate baffle outlet, and the second intermediate baffle outlet facilitates the oil flow and drainage of the oil cylinder chambers on both sides of the oil cylinder piston, simplifies the structure, and facilitates processing.

[0008] Furthermore, the distance between the first intermediate baffle oil outlet and the second intermediate baffle oil outlet is less than the distance between the first oil cylinder inlet and the second oil cylinder inlet.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: the oil inlet of the first cylinder and the oil inlet of the second cylinder realize the switching between two gears. Oil enters through the oil inlet of the first cylinder and exits through the oil inlet of the second cylinder, and oil exits through the first intermediate gear outlet and the second intermediate gear outlet. When the cylinder piston moves to the intermediate position, the oil pressure in the cylinder chamber is relieved by the oil outlet of the first intermediate gear, and the movement stops, thereby realizing the engagement of the intermediate gear.

[0010] Furthermore, the cylinder piston is connected to a shifting mechanism.

[0011] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the transmission of hydraulic pressure and enables gear engagement.

[0012] Furthermore, the shifting mechanism is connected to a shift fork shaft head.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the shift fork shaft head facilitates connection with the synchronizer shift mechanism, and facilitates the conversion of the sliding of the oil cylinder piston into the shifting action of the synchronizer shift mechanism.

[0014] Furthermore, the shift fork shaft head is connected to a synchronizer shifting mechanism.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the conversion of the sliding of the cylinder piston into the shifting action of the synchronizer shifting mechanism.

[0016] Furthermore, both the first intermediate baffle oil outlet and the second intermediate baffle oil outlet are connected to solenoid valves.

[0017] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the control of oil output from the first intermediate oil outlet and the second intermediate oil outlet through the solenoid valve.

[0018] Furthermore, plug bolts are installed on both sides of the hydraulic cylinder.

[0019] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the plug bolt facilitates the sealing of the oil cylinder, and facilitates the installation and maintenance of the oil cylinder.

[0020] Furthermore, the valve body is equipped with multiple bolt fixing holes.

[0021] The beneficial effect of adopting the above-mentioned further technical solution is that the setting of bolt fixing holes facilitates the installation and maintenance of hydraulic control valves.

[0022] In addition, this utility model also provides a tractor, including a hydraulic control valve as described in any one of the above.

[0023] The beneficial effects of adopting this utility model's technical solution are as follows: By setting a first intermediate oil outlet and a second intermediate oil outlet, the two chambers of the hydraulic control valve are opened, realizing the control logic of three gears. Combined with the synchronizer shifting mechanism, it enables the switching of gears on current tractors, facilitating the control of models with power shift functionality. It also facilitates the realization of neutral mode and expands the range of transmission route selection.

[0024] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of the hydraulic control valve provided in the embodiment of this utility model.

[0026] Figure 2 The second schematic diagram of the hydraulic control valve provided in the embodiment of this utility model.

[0027] Figure 3 The third schematic diagram of the hydraulic control valve provided in the embodiment of this utility model.

[0028] Figure 4 The fourth schematic diagram of the hydraulic control valve provided in the embodiment of this utility model.

[0029] Figure 5 The fifth schematic diagram of the hydraulic control valve provided in the embodiment of this utility model.

[0030] The following are the reference numerals: 1. Oil inlet of the first hydraulic cylinder; 2. Oil outlet of the first intermediate stop; 3. Oil outlet of the second intermediate stop; 4. Bolt fixing hole; 5. Oil inlet of the second hydraulic cylinder; 6. Plug bolt; 7. Gear shifting mechanism; 8. Gear shifting fork shaft head; 9. Hydraulic cylinder piston. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0032] like Figures 1 to 5As shown, this utility model embodiment provides a hydraulic control valve, including: a valve body, a first oil cylinder inlet 1, a second oil cylinder inlet 5, a first intermediate stop outlet 2, a second intermediate stop outlet 3, and an oil cylinder piston 9. The valve body is provided with an oil cylinder. The first oil cylinder inlet 1, the second oil cylinder inlet 5, the first intermediate stop outlet 2, and the second intermediate stop outlet 3 are all installed on the valve body. The first oil cylinder inlet 1, the second oil cylinder inlet 5, the first intermediate stop outlet 2, and the second intermediate stop outlet 3 are all connected to the oil cylinder. The oil cylinder piston 9 is slidably installed in the oil cylinder.

[0033] The beneficial effects of adopting this utility model's technical solution are as follows: By setting a first intermediate oil outlet and a second intermediate oil outlet, the two chambers of the hydraulic control valve are opened, realizing the control logic of three gears. Combined with the synchronizer shifting mechanism, it enables the switching of gears on current tractors, facilitating the control of models with power shift functionality. It also facilitates the realization of neutral mode and expands the range of transmission route selection.

[0034] like Figures 1 to 5 As shown, the first oil cylinder inlet 1 and the second oil cylinder inlet 5 are respectively located on the front end of the valve body, and the first intermediate baffle outlet 2 and the second intermediate baffle outlet 3 are respectively located on the top of the valve body.

[0035] The beneficial effects of adopting the above-mentioned further technical solution are: the position design of the first oil cylinder inlet, the second oil cylinder inlet, the first intermediate baffle outlet, and the second intermediate baffle outlet facilitates the oil flow and drainage of the oil cylinder chambers on both sides of the oil cylinder piston, simplifies the structure, and facilitates processing.

[0036] like Figures 1 to 5 As shown, further, the distance between the first intermediate baffle oil outlet 2 and the second intermediate baffle oil outlet 3 is less than the distance between the first oil cylinder inlet 1 and the second oil cylinder inlet 5.

[0037] The beneficial effects of adopting the above-mentioned further technical solution are: the oil inlet of the first cylinder and the oil inlet of the second cylinder realize the switching between two gears. Oil enters through the oil inlet of the first cylinder and exits through the oil inlet of the second cylinder, and oil exits through the first intermediate gear outlet and the second intermediate gear outlet. When the cylinder piston moves to the intermediate position, the oil pressure in the cylinder chamber is relieved by the oil outlet of the first intermediate gear, and the movement stops, thereby realizing the engagement of the intermediate gear.

[0038] like Figures 1 to 5 As shown, the cylinder piston 9 is further connected to a shifting mechanism 7.

[0039] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the transmission of hydraulic pressure and enables gear engagement.

[0040] like Figures 1 to 5 As shown, the shift mechanism 7 is further connected to a shift fork shaft head 8.

[0041] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the shift fork shaft head facilitates connection with the synchronizer shift mechanism, and facilitates the conversion of the sliding of the oil cylinder piston into the shifting action of the synchronizer shift mechanism.

[0042] Furthermore, the shift fork shaft head 8 is connected to a synchronizer shifting mechanism.

[0043] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the conversion of the sliding of the cylinder piston into the shifting action of the synchronizer shifting mechanism.

[0044] Furthermore, both the first intermediate baffle oil outlet 2 and the second intermediate baffle oil outlet 3 are connected to solenoid valves.

[0045] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the control of oil output from the first intermediate oil outlet and the second intermediate oil outlet through the solenoid valve.

[0046] like Figures 1 to 5 As shown, plug bolts 6 are further installed on both sides of the hydraulic cylinder.

[0047] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the plug bolt facilitates the sealing of the oil cylinder, and facilitates the installation and maintenance of the oil cylinder.

[0048] like Figures 1 to 5 As shown, the valve body is further provided with multiple bolt fixing holes 4.

[0049] The beneficial effect of adopting the above-mentioned further technical solution is that the setting of bolt fixing holes facilitates the installation and maintenance of hydraulic control valves.

[0050] This invention connects the two chambers of the hydraulic control valve to achieve three-position control logic. Combined with the synchronizer shifting mechanism, it enables the switching of gears in current tractors, facilitating the control of models with power shift functionality.

[0051] 1. The first oil cylinder inlet 1 and the second oil cylinder inlet 5 enable the switching between two gears. For example, oil enters through the first oil cylinder inlet 1 and oil exits through the second oil cylinder inlet 5. The oil cylinder piston 9 moves towards the second oil cylinder inlet 5 to achieve the gear shifting action.

[0052] 2. The two oil outlets (first intermediate stop oil outlet 2 and second intermediate stop oil outlet 3) are externally connected and then connected to a solenoid valve to control oil output or sealing. For example, oil enters through the first oil cylinder through port 1, oil exits through the second oil cylinder through port 5, and oil exits through the first intermediate stop oil outlet 2 and the second intermediate stop oil outlet 3. When the oil cylinder piston 9 moves to the middle position, the oil pressure in the oil cylinder chamber is relieved by the first intermediate stop oil outlet 2, and the movement stops, thereby realizing the engagement of the intermediate position.

[0053] 3. The shifting mechanism 7, the shift fork shaft head 8, and the oil cylinder piston 9 realize the transmission of hydraulic pressure and realize the engagement of gears.

[0054] The structure is simple in principle and stable and reliable. The valve block has a straight oil passage, which is convenient to process.

[0055] In addition, this utility model also provides a tractor, including a hydraulic control valve as described in any one of the above.

[0056] The beneficial effects of adopting this utility model's technical solution are as follows: By setting a first intermediate oil outlet and a second intermediate oil outlet, the two chambers of the hydraulic control valve are opened, realizing the control logic of three gears. Combined with the synchronizer shifting mechanism, it enables the switching of gears on current tractors, facilitating the control of models with power shift functionality. It also facilitates the realization of neutral mode and expands the range of transmission route selection.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydraulic control valve, characterized in that, include: The valve body comprises a first oil cylinder inlet, a second oil cylinder inlet, a first intermediate stop outlet, a second intermediate stop outlet, and an oil cylinder piston. The valve body contains an oil cylinder. The first oil cylinder inlet, the second oil cylinder inlet, the first intermediate stop outlet, and the second intermediate stop outlet are all mounted on the valve body. The first oil cylinder inlet, the second oil cylinder inlet, the first intermediate stop outlet, and the second intermediate stop outlet are all connected to the oil cylinder. The oil cylinder piston is slidably mounted in the oil cylinder.

2. A hydraulic control valve according to claim 1, characterized in that, The first oil cylinder inlet and the second oil cylinder inlet are located on the front end of the valve body on both sides, and the first intermediate baffle outlet and the second intermediate baffle outlet are located on the top of the valve body on both sides.

3. A hydraulic control valve according to claim 1, characterized in that, The distance between the first intermediate baffle oil outlet and the second intermediate baffle oil outlet is less than the distance between the first oil cylinder inlet and the second oil cylinder inlet.

4. A hydraulic control valve according to claim 1, characterized in that, The cylinder piston is connected to a shifting mechanism.

5. A hydraulic control valve according to claim 4, characterized in that, The shifting mechanism is connected to a shift fork shaft.

6. A hydraulic control valve according to claim 5, characterized in that, The shift fork shaft is connected to a synchronizer shifting mechanism.

7. A hydraulic control valve according to claim 1, characterized in that, Both the first intermediate baffle oil outlet and the second intermediate baffle oil outlet are connected to solenoid valves.

8. A hydraulic control valve according to claim 1, characterized in that, Both sides of the hydraulic cylinder are equipped with plug bolts.

9. A hydraulic control valve according to claim 1, characterized in that, The valve body is equipped with multiple bolt fixing holes.

10. A tractor, characterized in that, The hydraulic control valve includes any one of claims 1 to 9.

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