Gear valve and tractor

Abstract

The utility model provides a gear valve and a tractor. A gear valve comprises a valve body, a gear shifting mechanism, an oil cylinder piston and a detection device used for detecting the position of the oil cylinder piston, the oil cylinder piston is installed in the valve body in a sliding mode, the gear shifting mechanism is connected with the oil cylinder piston, and the detection device abuts against the gear shifting mechanism.

Description

Technical Field

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

[0002] With the rapid development of electronic control technology, tractor transmission routes have more options. In power shift models, the shifting mechanism is mostly open-loop control, which cannot provide real-time feedback on whether the gear is engaged, causing certain accidents. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gear valve and a tractor to address 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 gear valve includes: a valve body, a gear shifting mechanism, a hydraulic cylinder piston, and a detection device for detecting the position of the hydraulic cylinder piston. The hydraulic cylinder piston is slidably installed in the valve body, the gear shifting mechanism is connected to the hydraulic cylinder piston, and the detection device abuts against the gear shifting mechanism.

[0005] The beneficial effects of adopting the technical solution of this utility model are: a detection device for detecting the position of the cylinder piston is added to the gear valve, and the real-time movement position of the cylinder piston is fed back to the detection device through the mechanical structure, and the real-time position of the cylinder piston is fed back by the detection device.

[0006] Furthermore, the valve body is provided with a cylinder chamber, the cylinder piston is slidably installed in the cylinder chamber, and the valve body is provided with a first cylinder oil inlet and a second cylinder oil inlet, both of which are connected to the cylinder chamber.

[0007] The beneficial effect of adopting the above-mentioned further technical solution is that the oil inlet of the first oil cylinder and the oil inlet of the second oil cylinder realize the switching of two gears and realize the gear engagement action.

[0008] Furthermore, a pair of plugs are installed on the valve body, and the pair of plugs are respectively located at both ends of the cylinder chamber; a first intermediate baffle oil outlet and a second intermediate baffle oil outlet are installed on the valve body, and both the first intermediate baffle oil outlet and the second intermediate baffle oil outlet are connected to the cylinder chamber, and the free ends of the first intermediate baffle oil outlet and the second intermediate baffle oil outlet are connected to the solenoid valve through pipelines.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the first intermediate gear oil outlet and the second intermediate gear oil outlet are externally connected and then connected to a solenoid valve to control oil delivery or sealing. When the cylinder piston reaches the intermediate position, the oil pressure in the cylinder chamber is relieved by the first intermediate gear oil outlet, stopping the movement, thereby realizing the engagement of the intermediate gear. A pair of plugs are used to seal the cylinder chamber, facilitating the installation and maintenance of the internal components of the cylinder chamber.

[0010] Furthermore, the detection device is located at one end of the valve body, the shifting mechanism is located at the other end of the valve body, the detection device is connected to a sensor shaft, and the sensor shaft abuts against the shifting mechanism.

[0011] The advantages of adopting the above-mentioned further technical solution are: it facilitates the installation of sensor shafts and detection devices on existing gear valves, and facilitates the modification of gear valves. The structure is simple, and it is easy to install and maintain.

[0012] Furthermore, one end of the sensor shaft is connected to the detection device, and the other end of the sensor shaft is provided with an abutment component, which is a teardrop-shaped plate and abuts against the shifting mechanism.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that the angle sensor is connected to the sensor shaft. When the cylinder piston drives the shifting mechanism to move, the sensor shaft will move according to the shifting mechanism, changing the output value of the angle sensor, thereby realizing piston position feedback.

[0014] Furthermore, the shifting mechanism is provided with a triangular ramp groove, and the detection device abuts against the triangular ramp groove.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that: the angle sensor is connected to the sensor shaft. When the oil cylinder piston drives the shifting mechanism to move, the sensor shaft will move according to the triangular ramp groove, changing the output value of the angle sensor, thereby realizing piston position feedback.

[0016] Furthermore, the detection device is an angle sensor.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: by adding an angle sensor to the hydraulic control valve, the real-time movement position of the cylinder piston is fed back to the angle sensor through a mechanical structure, and the real-time position of the cylinder piston can be accurately fed back by measuring the voltage value output by the angle sensor, thus realizing closed-loop control of the program.

[0018] Furthermore, the shifting mechanism is connected to a shift fork shaft head.

[0019] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the shift fork shaft head facilitates the transmission of the motion torque of the cylinder piston, and facilitates the realization of the shift function.

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

[0021] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of bolt fixing holes facilitates the installation of the valve body by bolts, and facilitates the installation and maintenance of the valve body.

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

[0023] The beneficial effects of adopting the technical solution of this utility model are: a detection device for detecting the position of the cylinder piston is added to the gear valve, and the real-time movement position of the cylinder piston is fed back to the detection device through the mechanical structure, and the real-time position of the cylinder piston is fed back by the detection device.

[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 gear valve provided in the embodiment of this utility model.

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

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

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

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

[0030] The reference numerals in the attached diagram are as follows: 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. Angle sensor; 7. Plug; 8. Gear shifting mechanism; 9. Sensor shaft; 10. Gear shift fork shaft head; 11. Hydraulic cylinder piston; 12. Triangular ramp groove. 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 gear valve, including: a valve body, a shifting mechanism 8, a hydraulic cylinder piston 11, and a detection device for detecting the position of the hydraulic cylinder piston 11. The hydraulic cylinder piston 11 is slidably installed in the valve body, the shifting mechanism 8 is connected to the hydraulic cylinder piston 11, and the detection device abuts against the shifting mechanism 8.

[0033] The beneficial effects of adopting the technical solution of this utility model are: a detection device for detecting the position of the cylinder piston is added to the gear valve, and the real-time movement position of the cylinder piston is fed back to the detection device through the mechanical structure, and the real-time position of the cylinder piston is fed back by the detection device.

[0034] The shifting mechanism 8 is fixedly installed on the oil cylinder piston 11.

[0035] In this embodiment of the utility model, an angle sensor 6 is added to the hydraulic control valve (gear valve). The real-time movement position of the cylinder piston 11 is fed back to the angle sensor 6 through a mechanical structure. By measuring the voltage value output by the angle sensor 6, the real-time position of the cylinder piston 11 can be accurately fed back, thereby realizing closed-loop control.

[0036] It should be noted that the detection method of the angle sensor 6, as well as the control method, analysis method, and processing method of the controller, are all existing technologies. Those skilled in the art can easily conceive of how to program and implement them according to actual needs, so they will not be elaborated here.

[0037] like Figures 1 to 5 As shown, the valve body is further provided with a cylinder chamber, the cylinder piston 11 is slidably installed in the cylinder chamber, and the valve body is provided with a first cylinder oil inlet 1 and a second cylinder oil inlet 5, both of which are connected to the cylinder chamber.

[0038] The beneficial effect of adopting the above-mentioned further technical solution is that the oil inlet of the first oil cylinder and the oil inlet of the second oil cylinder realize the switching of two gears and realize the gear engagement action.

[0039] like Figures 1 to 5 As shown, further, a pair of plugs 7 are installed on the valve body, and the pair of plugs 7 are respectively located at both ends of the cylinder chamber; a first intermediate baffle oil outlet 2 and a second intermediate baffle oil outlet 3 are installed on the valve body, and the first intermediate baffle oil outlet 2 and the second intermediate baffle oil outlet 3 are both connected to the cylinder chamber, and the free ends of the first intermediate baffle oil outlet 2 and the second intermediate baffle oil outlet 3 are connected to the solenoid valve through pipelines.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the first intermediate gear oil outlet and the second intermediate gear oil outlet are externally connected and then connected to a solenoid valve to control oil delivery or sealing. When the cylinder piston reaches the intermediate position, the oil pressure in the cylinder chamber is relieved by the first intermediate gear oil outlet, stopping the movement, thereby realizing the engagement of the intermediate gear. A pair of plugs are used to seal the cylinder chamber, facilitating the installation and maintenance of the internal components of the cylinder chamber.

[0041] It should be noted that the control method of the solenoid valve is existing technology, and those skilled in the art can easily figure out how to implement it based on actual needs, so it will not be elaborated here.

[0042] like Figures 1 to 5 As shown, the detection device is located at one end of the valve body, the shifting mechanism 8 is located at the other end of the valve body, the detection device is connected to a sensor shaft 9, and the sensor shaft 9 abuts against the shifting mechanism 8.

[0043] The advantages of adopting the above-mentioned further technical solution are: it facilitates the installation of sensor shafts and detection devices on existing gear valves, and facilitates the modification of gear valves. The structure is simple, and it is easy to install and maintain.

[0044] like Figures 1 to 5 As shown, one end of the sensor shaft 9 is connected to the detection device, and the other end of the sensor shaft 9 is provided with an abutment component, which is a teardrop-shaped plate and abuts against the shifting mechanism 8.

[0045] The beneficial effect of adopting the above-mentioned further technical solution is that the angle sensor is connected to the sensor shaft. When the cylinder piston drives the shifting mechanism to move, the sensor shaft will move according to the shifting mechanism, changing the output value of the angle sensor, thereby realizing piston position feedback.

[0046] like Figures 1 to 5 As shown, the shift mechanism 8 is further provided with a triangular ramp groove 12, and the detection device abuts against the triangular ramp groove 12.

[0047] The beneficial effect of adopting the above-mentioned further technical solution is that: the angle sensor is connected to the sensor shaft. When the oil cylinder piston drives the shifting mechanism to move, the sensor shaft will move according to the triangular ramp groove, changing the output value of the angle sensor, thereby realizing piston position feedback.

[0048] like Figures 1 to 5 As shown, the detection device is further defined as an angle sensor 6.

[0049] The beneficial effects of adopting the above-mentioned further technical solution are: by adding an angle sensor to the hydraulic control valve, the real-time movement position of the cylinder piston is fed back to the angle sensor through a mechanical structure, and the real-time position of the cylinder piston can be accurately fed back by measuring the voltage value output by the angle sensor, thus realizing closed-loop control of the program.

[0050] like Figures 1 to 5 As shown, the shifting mechanism 8 is further connected to a shift fork shaft head 10.

[0051] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the shift fork shaft head facilitates the transmission of the motion torque of the cylinder piston, and facilitates the realization of the shift function.

[0052] like Figures 1 to 5 As shown, the valve body is further provided with multiple bolt fixing holes 4.

[0053] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of bolt fixing holes facilitates the installation of the valve body by bolts, and facilitates the installation and maintenance of the valve body.

[0054] 1. The first oil cylinder inlet 1 and the second oil cylinder inlet 5 enable the switching between two gears. For example, oil enters the first oil cylinder inlet 1 and oil exits the second oil cylinder inlet 5, and the oil cylinder piston 11 moves towards the second oil cylinder inlet 5 to achieve the gear shifting action.

[0055] 2. The first intermediate gear oil outlet 2 and the second intermediate gear 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 cylinder oil port 1, oil exits through the second cylinder oil port 5, and oil exits through the first intermediate gear oil outlet 2 and the second intermediate gear oil outlet 3. When the cylinder piston reaches the middle position, the oil pressure in the cylinder chamber is relieved by the first intermediate gear oil outlet 2, and the movement stops, thereby realizing the engagement of the intermediate gear.

[0056] 3. Angle sensor 6 is connected to sensor shaft 9. When the cylinder piston 11 drives the shifting mechanism 8 to move, the sensor shaft 9 will move according to the triangular ramp groove 12, changing the output value of the angle sensor, thereby realizing piston position feedback.

[0057] 1. The structure and principle are simple, stable and reliable.

[0058] 2. The valve block has a straight oil passage, making it easy to process.

[0059] 3. The precise feedback of the cylinder piston position allows for quick determination of whether the gear is engaged.

[0060] In addition, this utility model also provides a tractor, including a gear valve as described in any one of the above.

[0061] The beneficial effects of adopting the technical solution of this utility model are: a detection device for detecting the position of the cylinder piston is added to the gear valve, and the real-time movement position of the cylinder piston is fed back to the detection device through the mechanical structure, and the real-time position of the cylinder piston is fed back by the detection device.

[0062] 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 position valve, characterized in that, include: The valve body, shifting mechanism, hydraulic cylinder piston, and detection device for detecting the position of hydraulic cylinder piston are provided. The hydraulic cylinder piston is slidably installed in the valve body, the shifting mechanism is connected to the hydraulic cylinder piston, and the detection device abuts against the shifting mechanism.

2. The position valve according to claim 1, characterized in that, The valve body is provided with a cylinder chamber, and the cylinder piston is slidably installed in the cylinder chamber. The valve body is provided with a first cylinder oil inlet and a second cylinder oil inlet, both of which are connected to the cylinder chamber.

3. A position valve according to claim 2, characterized in that, A pair of plugs are installed on the valve body, and the pair of plugs are respectively located at both ends of the cylinder chamber; a first intermediate baffle oil outlet and a second intermediate baffle oil outlet are installed on the valve body, and the first intermediate baffle oil outlet and the second intermediate baffle oil outlet are both connected to the cylinder chamber. The free ends of the first intermediate baffle oil outlet and the second intermediate baffle oil outlet are connected to the solenoid valve through pipelines.

4. A position valve according to claim 1, characterized in that, The detection device is located at one end of the valve body, and the shifting mechanism is located at the other end of the valve body. The detection device is connected to a sensor shaft, and the sensor shaft abuts against the shifting mechanism.

5. A position valve according to claim 4, characterized in that, One end of the sensor shaft is connected to the detection device, and the other end of the sensor shaft is provided with an abutment component, which is a teardrop-shaped plate and abuts against the shifting mechanism.

6. A position valve according to claim 1, characterized in that, The shifting mechanism is provided with a triangular ramp groove, and the detection device abuts against the triangular ramp groove.

7. A position valve according to claim 1, characterized in that, The detection device is an angle sensor.

8. A position valve according to claim 1, characterized in that, The shifting mechanism is connected to a shift fork shaft.

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

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

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