Lubricating structure of power gear shifting chassis

Abstract

The utility model discloses a lubricating structure of a power gear shifting chassis, and belongs to parts in the field of tractors. Lubricating oil flows out through a coarse filter in a rear axle shell and enters a pump A of a duplex pump through a magnetic detector and a duplex one-way valve, oil liquid is in a high-temperature state and enters an oil cooler through a constant-temperature valve assembly, after heat exchange, the lubricating oil flows out of an oil outlet pipe of the oil cooler and enters a flow collecting valve block, and the lubricating oil is divided into two paths after passing through a fine filter, one path of lubricating oil enters a chassis gear shifting or reversing lubricating system; and under the control of the PTO lubricating oil proportional electromagnetic valve, the other path of lubricating oil flows into the PTO lubricating system. The structure is simplified, the temperature of oil of a lubricating system is reasonably controlled within a certain range, and energy loss and pressure loss of lubricating oil are reduced; under the condition that the lubricating oil does not need to be discharged or oil liquid of an oil way of a system is not polluted, the cleanliness condition of the lubricating oil is conveniently and quickly checked; and the pipeline is provided with a duplex one-way valve, so that the failure rate of the duplex pump is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a component of a tractor, in particular to a lubrication structure of a power shift chassis. Background Art

[0002] With the improvement of tractor technology, power shift technology has been gradually applied and recognized and used by the majority of users. The lubrication system layout of power shift tractors is the main component of the tractor, including suspension hydraulic system, steering system, gearbox power shift or reversing, PTO wet clutch, etc. At present, the flow loss of lubricating oil in the lubrication system of tractors is high, the cleanliness of lubricating oil is not easy to monitor, the oil circuit diversion is complex, and the structure is cumbersome. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a lubrication structure of a tractor power shift chassis which has a simplified and reasonable structure and can control the temperature of the oil in the lubrication system within a certain range, reduce the energy loss of the lubricating oil, and at the same time, reduce the pressure loss of the lubricating oil flow; without draining the lubricating oil or contaminating the oil in the system oil circuit, it is possible to conveniently and quickly check the cleanliness of the lubricating oil.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lubrication structure of a power shift chassis, including a lubricating oil outlet adapter, a magnetic detector assembly, a double pump, a compound one-way valve, a thermostatic valve assembly, an oil cooler, a collecting valve block, a fine filter, and a PTO lubricating oil proportional solenoid valve. The chassis rear axle housing serves as a lubricating oil tank. The lubricating oil flows out from the lubricating oil adapter outlet, passes through the magnetic detector assembly, and is connected to the double pump through the lubricating oil outlet pipe and the compound one-way valve. After the lubricating oil passes through pump A, it enters the oil outlet pipe. Enter the thermostatic valve assembly, the lubricating oil enters the oil cooler through the oil inlet pipe of the oil cooler at high temperature. After heat exchange, the cooled lubricating oil flows out from the oil cooler outlet pipe, passes through the thermostatic valve assembly and the manifold block oil inlet pipe, and enters the manifold block. After passing through the fine filter, the lubricating oil is divided into two paths. One path of lubricating oil enters the chassis shifting or reversing lubrication system through the gearbox oil inlet port; under the control of the PTO lubricating oil proportional solenoid valve, the other path of lubricating oil flows into the PTO wet clutch lubricating oil system through the valve core of the proportional solenoid valve and the PTO lubricating oil inlet pipe. The suspension mechanism lubricating oil flows out from pump B of the double pump and flows into the hydraulic system of the suspension mechanism through the suspension mechanism oil inlet pipe.

[0005] Preferably, the thermostatic valve assembly is a self-controlled valve, which is mainly composed of components such as a screw cover, a temperature sensing element, an adjustment gasket, a valve, a thermostatic valve spring, and an outer shell. The switch of the thermostatic valve assembly is controlled by the temperature sensing element. The temperature sensing part of the temperature sensing element is sleeved on the valve, the push rod part is pressed on the screw cover, and the thermostatic valve spring is sleeved on the temperature sensing part of the temperature sensing element. When the engine is working, the double pump is running, and the lubricating oil of the chassis lubrication system begins to flow. When the temperature is lower than (45±5)℃, the lubricating oil in the pipeline flows directly back to the lubricating oil tank, that is, the chassis rear axle housing, through the valve. When the temperature reaches (45±5)℃, due to the expansion of paraffin in the temperature sensing element, the valve begins to close under the action of the push rod of the temperature sensing element. At this time, part of the lubricating oil flows through the oil cooler. As the lubricating oil temperature gradually increases, the valve gradually closes under the action of the temperature sensing element. When the lubricating oil temperature reaches (60±5)℃, the valve is completely closed, and all the lubricating oil flows through the oil cooler for heat exchange. When the lubricating oil temperature drops, the wax in the temperature sensing element begins to shrink, and the valve gradually opens under the action of the thermostatic valve spring. When the oil temperature is lower than (45±5)℃, the valve is fully opened. By adjusting the number of gaskets, the lubricating oil temperature for opening and closing the thermostatic valve assembly can be debugged and guaranteed.

[0006] Preferably, the magnetic detector assembly is composed of an adapter body, an outer body, a positioning sleeve, a detector spring, an inner body, a magnetic pin shaft, and a locking pin. The magnetic detector assembly is connected to the lubricating oil outlet adapter seat of the lubricating oil tank through the adapter body. The detector spring is installed between the outer body and the inner body, and the positioning sleeve is installed in the outer body with an interference fit to fix the inner body. When the magnetic pin shaft is installed, it is inserted into the inner body, and the shoulder pushes the top surface of the inner body to overcome the spring force generated by the compressed detector spring to push the inner body through the inner hole of the outer body and enter the oil path hole of the adapter body together with the inner body. The locking pin is passed through the pin groove on the outer body, rotated 30 degrees, and fixed in the pin groove by the return elastic force of the detector spring. The lubricating oil flows through the magnetic pin shaft, and the metal fragments or particles contained in the oil pass through the three holes of the inner body and will be adsorbed on the shaft head of the magnetic pin shaft. The structural characteristics of the magnetic detector assembly can prevent the oil in the lubricating oil path from flowing out by rotating and disassembling the magnetic pin shaft, and at the same time, it also prevents the oil path pollution caused by inspection. According to the prescribed maintenance cycle, the magnetic pin can be easily and quickly disassembled by rotating to check the cleanliness of the lubricating oil.

[0007] Preferably, the collecting valve block is a component for diverting the lubricating oil in the lubrication pipeline. A fine filter is installed on the collecting valve block. After the lubricating oil is fully filtered in the fine filter, it flows into the output oil channel of the collecting valve block and is divided into two oil channels through the side holes in the oil channel. The lubricating oil flows into the chassis shifting or reversing lubrication system and the PTO wet clutch lubricating oil system respectively. The switch of the PTO system lubricating oil channel is controlled by a proportional solenoid valve. If the oil inlet channel of the collecting valve block and the oil outlet channel of the PTO system lubrication are blocked, a lubricating oil pressure sensor or a lubricating oil temperature sensor can be replaced and installed respectively to monitor the temperature or pressure of the lubricating oil.

[0008] Preferably, the compound one-way valve is a component for diverting the oil flow in the lubrication pipeline before the oil enters the duplex pump, realizing one-way opening and one-way flow of oil. After the engine is started, the duplex pump is driven to operate through the spline, and the oil pressure opens the valve flaps at the two ends of the oil outlet in the compound one-way valve, and enters the A and B chambers of the duplex pump for circulation. When the engine is turned off, the duplex pump stops running, and the lubricating oil pressure is reduced, the valve flap in the pressure compound one-way valve closes the oil circuit under the action of the return spring, and part of the lubricating oil will be retained in the A and B chambers of the duplex pump, which can fully avoid the phenomenon of oil-free wear or abnormal sound when the duplex pump (4) is put into operation again, thereby reducing the failure rate of the duplex pump.

[0009] The utility model has a simplified structure and reasonably controls the temperature of the oil in the lubrication system within a certain range, thereby reducing the energy loss of the lubricating oil and, at the same time, reducing the pressure loss of the lubricating oil flow; it realizes convenient and quick inspection of the cleanliness of the lubricating oil without draining the lubricating oil or contaminating the oil in the system oil circuit; the pipeline is arranged with a compound one-way valve to avoid dry grinding or emptying of the double pump and reduce the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 is a cross-sectional view of a thermostatic valve assembly;

[0013] Figure 3 is a cross-sectional view of a magnetic detector assembly;

[0014] Figure 4 It is a cross-sectional view of the magnetic detector assembly after the magnetic probe is disassembled;

[0015] Figure 5 It is a schematic diagram of the structure of the manifold block assembly and the flow of lubricating oil;

[0016] Figure 6 This is the hydraulic principle diagram of the utility model.

[0017] In the figure, 1. lubricating oil outlet adapter, 2. magnetic detector assembly, 3. lubricating oil outlet pipe, 4. double pump, 5. compound one-way valve, 6. oil outlet pipe, 7. oil cooler oil inlet pipe, 8. oil cooler, 9. oil cooler oil outlet pipe, 10. thermostatic valve assembly, 12 suspension mechanism oil inlet pipe, 13. collecting valve block oil inlet pipe, 14. collecting valve block, 15. fine filter, 16. gearbox oil inlet, 17. proportional solenoid valve, 18. PTO lubricating oil inlet pipe, 19. adapter body, 20. outer body, 21. inner body, 22. locking pin, 23. detector spring, 24. positioning sleeve, 25. magnetic pin shaft, 26. temperature sensing element, 27. adjusting gasket, 28. valve, 29. thermostatic valve spring, 30. outer body, 31. screw cover, 32. oil inlet channel blockage, 33. oil outlet channel blockage, 34. lubricating oil tank. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] like Figure 1-6 As shown, a lubrication structure of a power shift chassis has a simplified and reasonable structure, which controls the temperature of the oil in the lubrication system within a certain range, reduces the energy loss of the lubricating oil, and at the same time, reduces the pressure loss of the lubricating oil flow; without draining the lubricating oil or contaminating the oil in the system oil circuit, the cleanliness of the lubricating oil can be checked conveniently and quickly, and the lubricating oil in the lubricating pipeline will not be contaminated during operation.

[0020] The lubrication structure of the power shift chassis mainly includes a lubricating oil outlet adapter 1, a magnetic detector assembly 2, a double pump 4, a compound check valve 5, a thermostatic valve assembly 10, an oil cooler 8, a collecting valve block 14, a fine filter 15, and a PTO lubricating oil proportional solenoid valve 17. The chassis rear axle housing serves as a lubricating oil tank 34. The lubricating oil flows through a coarse filter pipeline in the rear axle housing, flows out from the lubricating oil outlet adapter 1 and the magnetic detector assembly 2, and is connected to the double pump 4 through the lubricating oil outlet pipe 3 and the compound check valve 5. After the lubricating oil passes through the pump A, it enters the thermostatic valve assembly 1 from the outlet pipe 6. 0, the lubricating oil enters the oil cooler 8 through the oil cooler inlet pipe 7 at high temperature. After heat exchange, the cooled lubricating oil flows out from the oil cooler outlet pipe 9, passes through the thermostatic valve assembly 10 and the manifold block inlet pipe 13, and enters the manifold block 14. After passing through the fine filter 15, the lubricating oil is divided into two paths. One path of lubricating oil enters the chassis shift or reversing lubrication system through the gearbox oil inlet 16; under the control of the PTO lubricating oil proportional solenoid valve 17, the other path of lubricating oil flows into the PTO wet clutch lubricating oil system through the valve core of the proportional solenoid valve 17 and the PTO lubricating oil inlet pipe 18. The suspension mechanism lubricating oil flows out from the pump B of the double pump 4 and flows into the hydraulic system of the suspension mechanism through the suspension mechanism inlet pipe 30.

[0021] The thermostatic valve assembly 10 is a self-controlled valve, mainly composed of a screw cover 31, a temperature sensing element 26, an adjustment gasket 27, a valve 28, a thermostatic valve spring 29, an outer shell 30 and other components. The switch of the thermostatic valve assembly 10 is controlled by the temperature sensing element 26. The temperature sensing part of the temperature sensing element 26 is sleeved on the valve 28, the push rod part presses on the screw cover 31, and the thermostatic valve spring 29 is sleeved on the temperature sensing part of the temperature sensing element 26. When the engine is working, the double pump 4 is running, and the lubricating oil of the chassis lubrication system starts to flow. When the temperature is lower than (45±5)℃, the lubricating oil in the pipeline directly flows back to the lubricating oil tank 34, that is, the chassis rear axle housing, through the valve 28. When the temperature reaches (45±5)℃, due to the expansion of the wax in the temperature sensing element 26, the valve 28 begins to close under the action of the push rod of the temperature sensing element 26. At this time, part of the lubricating oil flows through the oil cooler 8. As the lubricating oil temperature gradually increases, the valve 28 gradually closes under the action of the temperature sensing element 26. When the lubricating oil temperature reaches (60±5)℃, the valve 28 is completely closed, and all the lubricating oil flows through the oil cooler 8 for heat exchange. When the lubricating oil temperature drops, the wax in the temperature sensing element 26 begins to shrink, and the valve 28 gradually opens under the action of the thermostatic valve spring 29. When the oil temperature is lower than (45±5)℃, the valve 28 is completely opened. By adjusting the number of gaskets 27, the opening and closing lubricating oil temperature of the thermostatic valve assembly 10 can be debugged and guaranteed.

[0022] The magnetic detector assembly 2 is composed of an adapter body 19, an outer body 20, a positioning sleeve 24, a detector spring 23, an inner body 21, a magnetic pin 25, and a locking pin 22. The magnetic detector assembly 2 is connected to the lubricating oil outlet adapter 1 of the lubricating oil tank 34 through the adapter body 19. The detector spring 23 is installed between the outer body 20 and the inner body 21, and the positioning sleeve 24 is installed in the outer body 20 with an interference fit to fix the inner body 21. When the magnetic pin 25 is installed, it is inserted into the inner body 21, and the shoulder pushes the top surface of the inner body 21 to overcome the spring force generated by the compression detector spring 23 to push the inner body 21, pass through the inner hole of the outer body 20, and enter the oil passage hole of the adapter body 19 together with the inner body 21. The locking pin 22 is passed through the pin groove on the outer body 20, rotated 30 degrees, and fixed in the pin groove by the return elastic force of the detector spring 23. The lubricating oil flows through the magnetic pin 25, and the metal fragments or particles contained in the oil pass through the three holes of the inner body 21 and will be adsorbed on the shaft head of the magnetic pin 25. The structural characteristics of the magnetic detector assembly 2 can prevent the oil in the lubricating oil circuit from flowing out by rotating and disassembling the magnetic pin 25, and at the same time, it also prevents the oil circuit from being contaminated due to inspection. According to the prescribed maintenance cycle, the cleanliness of the lubricating oil can be checked conveniently and quickly by rotating and disassembling the magnetic pin 25.

[0023] The collecting valve block 14 is a component for diverting the lubricating oil. A fine filter 15 is installed on the collecting valve block 14. After being fully filtered in the fine filter 15, the lubricating oil flows into the output oil channel of the collecting valve block 14, and is divided into two oil channels through the side holes in the oil channel. The lubricating oil flows into the chassis shifting or reversing lubrication system and the PTO wet clutch lubricating oil system respectively; the switch of the PTO system lubricating oil channel is controlled by a proportional solenoid valve 17. The blockage 32 of the oil inlet channel of the collecting valve block 14 and the blockage 33 of the oil outlet channel of the PTO system lubrication can be replaced with a lubricating oil pressure sensor or a lubricating oil temperature sensor to monitor the temperature or pressure of the lubricating oil.

[0024] The compound one-way valve 5 is a component for diverting the oil flow in the lubrication pipeline before the oil enters the duplex pump 4, realizing one-way opening and one-way flow of oil. After the engine is started, the duplex pump 4 is driven to operate through the spline, and the oil flows with a certain pressure in the lubrication pipeline. The oil pressure opens the valve flaps at the oil outlets at both ends of the compound one-way valve 5, and enters the A and B chambers of the duplex pump 4 for circulation. When the engine is turned off, the duplex pump 4 stops running, the oil pressure in the lubrication pipeline decreases, and the valve flaps in the pressure compound one-way valve 5 close the oil circuit under the action of the return spring, and part of the lubricating oil will remain in the A and B chambers of the duplex pump 4, which can fully avoid the phenomenon of oil-free dry grinding or abnormal sound of emptying in the initial operation of the duplex pump 4 when the engine is started again.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lubrication structure for a power shift chassis, characterized in that: The invention comprises a lubricating oil outlet adapter (1), a magnetic detector assembly (2), a double pump (4), a compound check valve (5), a thermostatic valve assembly (10), an oil cooler (8), a collecting valve block (14), a fine filter (15), and a PTO lubricating oil proportional solenoid valve (17). The chassis rear axle housing serves as a lubricating oil tank (34). The lubricating oil flows out from the outlet of the lubricating oil outlet adapter (1), passes through the magnetic detector assembly (2), and is connected to the double pump (4) through the lubricating oil outlet pipe (3) and the compound check valve (5). After passing through pump A, the lubricating oil enters the thermostatic valve assembly (10) from the oil outlet pipe (6). The lubricating oil enters the oil cooler (8) through the oil inlet pipe (7) of the oil cooler in a high temperature state. ), after heat exchange, the cooled lubricating oil flows out from the oil cooler outlet pipe (9), passes through the thermostatic valve assembly (10) and the manifold block oil inlet pipe (13), and enters the manifold block (14). After passing through the fine filter (15), the lubricating oil is divided into two paths. One path of lubricating oil enters the chassis shifting or reversing lubrication system through the gearbox oil inlet port (16); under the control of the PTO lubricating oil proportional solenoid valve (17), the other path of lubricating oil passes through the valve core of the proportional solenoid valve (17) and the PTO lubricating oil inlet pipe (18) and flows into the PTO wet clutch lubricating oil system; the suspension mechanism lubricating oil flows out from the pump B of the double pump (4), and flows into the hydraulic system of the suspension mechanism through the suspension mechanism oil inlet pipe (12).

2. The lubrication structure of a power shift chassis according to claim 1, characterized in that: The thermostatic valve assembly (10) is a self-controlled valve, mainly composed of a screw cover (31), a temperature sensing element (26), an adjustment gasket (27), a valve (28), a thermostatic valve spring (29), an outer shell (30) and other components; the switch of the thermostatic valve assembly (10) is controlled by the temperature sensing element (26); the temperature sensing part of the temperature sensing element (26) is sleeved on the valve (28), the push rod part presses on the screw cover (31), and the thermostatic valve spring (29) is sleeved on the temperature sensing part of the temperature sensing element (26); when the engine is working, the double pump (4) is running, and the lubricating oil of the chassis lubrication system starts to flow. When the temperature is lower than (45±5)°C, the lubricating oil in the pipeline directly flows back to the lubricating oil tank (34), that is, the chassis rear axle housing, through the valve (28); when the temperature reaches (45±5)°C, due to Due to the expansion of the wax in the temperature sensing element (26), the valve (28) begins to close under the action of the push rod of the temperature sensing element (26). At this time, part of the lubricating oil flows through the oil cooler (8). As the lubricating oil temperature gradually increases, the valve (28) gradually closes under the action of the temperature sensing element (26); when the lubricating oil temperature reaches (60±5)°C, the valve (28) is completely closed, and the lubricating oil all flows through the oil cooler (8) for heat exchange; when the lubricating oil temperature drops, the wax in the temperature sensing element (26) begins to shrink, and the valve (28) gradually opens under the action of the thermostatic valve spring (29); when the oil temperature is lower than (45±5)°C, the valve (28) is completely opened; by adjusting the number of gaskets (27), the opening and closing lubricating oil temperature of the thermostatic valve assembly (10) is debugged and guaranteed.

3. The lubrication structure of a power shift chassis according to claim 1, characterized in that: The magnetic detector assembly (2) is composed of an adapter body (19), an outer body (20), a positioning sleeve (24), a detector spring (23), an inner body (21), a magnetic pin shaft (25), and a locking pin (22); the magnetic detector assembly (2) is connected to a lubricating oil outlet adapter seat (1) of a lubricating oil tank (34) through the adapter body (19); the detector spring (23) is installed between the outer body (20) and the inner body (21); the positioning sleeve (24) is installed in the outer body (20) with an interference fit to fix the inner body (21); when the magnetic pin shaft (25) is installed, it is inserted into the inner body (21), and the shoulder pushes the top surface of the inner body (21) to overcome the spring force generated by the compression of the detector spring (23) to push the inner body (21), and the magnetic pin shaft (25) is inserted into the inner body (21) to push the inner body (21) through the outer body (20 ) and enters the oil path hole of the adapter body (19) together with the inner body (21). The locking pin (22) passes through the pin groove on the outer body (20). After rotating 30 degrees, the detector spring (23) fixes the detector in the pin groove. The lubricating oil flows through the magnetic pin shaft (25). The metal fragments or particles contained in the oil pass through the three holes of the inner body (21) and are adsorbed on the shaft head of the magnetic pin shaft (25). The structural feature of the magnetic detector assembly (2) is that the magnetic pin shaft (25) can be rotated to remove the magnetic pin shaft (25), which can avoid the oil in the lubricating oil path from flowing out. At the same time, it also prevents the oil path from being polluted due to inspection. According to the prescribed maintenance cycle, the magnetic pin shaft (25) can be conveniently and quickly rotated to remove the magnetic pin shaft (25) to check the cleanliness of the lubricating oil.

4. The lubrication structure of a power shift chassis according to claim 1, characterized in that: The collecting valve block (14) is a component for diverting the lubricating oil in the lubricating pipeline. A fine filter (15) is installed on the collecting valve block (14). After the lubricating oil is fully filtered in the fine filter (15), it flows into the output oil channel of the collecting valve block (14) and is divided into two oil channels through the side holes in the oil channel. The lubricating oil flows into the chassis shifting or reversing lubricating system and the PTO wet clutch lubricating oil system respectively. The switch of the PTO system lubricating oil channel is controlled by a proportional solenoid valve (17). The blockage (32) of the oil inlet channel of the collecting valve block (14) and the blockage (33) of the oil outlet channel of the PTO system lubrication can be replaced by a lubricating oil pressure sensor or a lubricating oil temperature sensor to monitor the temperature or pressure of the lubricating oil.

5. The lubrication structure of a power shift chassis according to claim 1, characterized in that: The compound one-way valve (5) is a component for diverting the oil flow in the lubrication pipeline before the oil enters the duplex pump (4), thereby realizing one-way opening of the oil flow. After the engine is started, the duplex pump (4) is driven to operate through the spline, and the oil flows with a certain pressure in the lubrication pipeline. The oil pressure opens the valve flaps at the two ends of the oil outlet in the compound one-way valve (5), and enters the A and B chambers of the duplex pump (4) for circulation respectively. When the engine is turned off, the duplex pump (4) stops running, the oil pressure in the lubrication pipeline decreases, and the valve flaps in the pressure compound one-way valve (5) close the oil circuit under the action of the return spring, so that part of the lubricating oil will be retained in the A and B chambers of the duplex pump (4), which can fully avoid the phenomenon of dry grinding without oil or abnormal sound of emptying of the duplex pump (4) when the engine is started again.

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