High stability hydraulic motor

Abstract

The present application relates to the field of motors, and in particular to a high-stability hydraulic motor, comprising a housing, a housing cover, an oil-passing pan and an oil distribution pan, wherein the housing is connected to the housing cover, a crankshaft is rotatably connected to the housing cover, the oil distribution pan is connected to the crankshaft, and the oil-passing pan is connected to the housing cover; a sealing assembly is connected to the oil distribution pan, the sealing assembly comprises a sealing ring and a tightening elastic member, a sealing cavity for accommodating the sealing ring is provided on the surface of the oil distribution pan facing the oil-passing pan, one end of the tightening elastic member in the direction of the elastic force is connected to the sealing ring, and the other end of the tightening elastic member in the direction of the elastic force is connected to the inner wall of the sealing cavity. The arrangement of the sealing ring and the tightening elastic member in the present application, the elastic force of the tightening elastic member drives the surface of the sealing ring to be difficult to separate from the oil-passing pan, thereby achieving sealing stability between the oil-passing pan and the oil distribution pan, making it difficult for the hydraulic oil to overflow from the connection between the oil-passing pan and the oil distribution pan, ensuring the normal use of the high-stability hydraulic motor, and thus extending the service life of the high-stability hydraulic motor.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to a high-stability hydraulic motor. Background Art

[0002] The hydraulic motor is an actuator in the hydraulic system. It converts the liquid pressure energy provided by the hydraulic pump into the mechanical energy of its output shaft. The liquid is the medium for transmitting force and motion.

[0003] The swing cylinder hydraulic motor is a type of hydraulic motor. The axis of the swing cylinder and the piston always passes through the center of the crankshaft bearing sleeve, so there is no lateral force on the swing cylinder and the piston. The high-pressure oil enters the oil distribution plate that rotates with the crankshaft from the oil inlet of the oil pan, and enters the upper part of the piston through the shell cover flow channel and the swing cylinder earring, and then enters the lower balance chamber of the piston through the throttling hole. At this time, the piston passing the high-pressure oil transmits the force to the eccentric shaft through the spherical bearing sleeve and the roller under the action of the oil pressure. The crankshaft rotates under the action of the eccentric torque. As the high-pressure oil enters, the piston moves toward the axis until the bottom dead center. The piston chamber begins to connect with the oil return port through the oil distribution plate. At this time, the piston is pushed away from the axis direction by the push of the crankshaft, the volume of the piston chamber is reduced, and the low-pressure oil is discharged back to the oil return port through the channel at the swing cylinder earring, the shell flow channel, the oil distribution channel, and the oil plate. Each piston is connected to the high pressure and low pressure in turn. The driving torque generated by each high-pressure piston on the output shaft center is added in the same direction, so that the output shaft of the hydraulic motor obtains continuous and stable rotational torque; when the oil flow direction is changed, the direction of the hydraulic motor can be changed. If the distribution plate is rotated 180 degrees for assembly, the reversal of the hydraulic motor can also be achieved.

[0004] When the swing cylinder hydraulic motor is used for a long time, the sealing ring at the connection between the oil pan and the oil distribution plate is very easy to wear, causing hydraulic oil leakage, thus affecting the use of the swing cylinder hydraulic motor. Summary of the invention

[0005] In order to improve the problem that the sealing ring at the connection between the oil pan and the oil distribution pan is extremely easy to wear, the present application provides a high-stability hydraulic motor.

[0006] The present application provides a high-stability hydraulic motor, which adopts the following technical solution:

[0007] A high-stability hydraulic motor comprises a shell, a shell cover, an oil passing pan and an oil distribution plate, wherein the shell is connected to the shell cover, a crankshaft is rotatably connected to the shell cover, the oil distribution plate is connected to the crankshaft, the oil passing pan is connected to the shell cover, and the oil passing pan covers the oil distribution plate; a sealing assembly is connected to the oil distribution plate, the sealing assembly comprises a sealing ring and a tightening elastic member, a sealing cavity for accommodating the sealing ring is provided on the surface of the oil distribution plate facing the oil passing pan, one end of the tightening elastic member in the elastic force direction is connected to the sealing ring, and the other end of the tightening elastic member in the elastic force direction is connected to the inner wall of the sealing cavity, and the tightening elastic member has a tendency of elastic force driving the sealing ring to slide in a direction away from the sealing cavity.

[0008] By adopting the above technical scheme, when the oil passing pan is connected to the shell cover, the oil passing pan covers the oil distribution pan, one end of the elastic force direction of the tightening elastic member is connected to the inner wall of the sealing chamber, and the other end of the elastic force direction of the tightening elastic member is connected to the sealing ring. The elastic force of the tightening elastic member drives the sealing ring to slide in the direction away from the sealing chamber, and the sealing ring presses against the surface of the oil passing pan. The elastic force of the tightening elastic member drives the surface of the sealing ring to be difficult to separate from the oil passing pan, thereby achieving sealing stability between the oil passing pan and the oil distribution pan, making it difficult for the hydraulic oil to overflow from the connection between the oil passing pan and the oil distribution pan, thereby ensuring the normal use of the high-stability hydraulic motor and extending the service life of the high-stability hydraulic motor.

[0009] Optionally, a sliding block is connected to the surface of the sealing ring, and a sliding groove for the sliding block to slide is provided on the inner wall of the sealing cavity, and the sliding direction of the sliding block and the elastic force direction of the pressing elastic member are parallel to each other.

[0010] By adopting the above technical solution, when the elastic force of the elastic member drives the sealing ring to slide, it drives the slider to slide on the inner wall of the slide groove, so that the sealing ring is not easily offset when sliding in the sealing cavity, thereby ensuring the stability of the sealing ring sliding in the sealing cavity.

[0011] Optionally, a detection component is connected to the oil distribution plate, and the detection component includes a contact switch and a warning horn. The contact switch is connected to the inner wall of the slide groove close to the oil pan, and the warning horn is connected to the outer wall of the oil pan. The contact switch and the warning horn are electrically connected. When the elastic force of the abutting elastic member drives the sealing ring to slide away from the sealing chamber, the contact switch abuts against the slider and is turned on, and the warning horn is energized and makes a sound.

[0012] By adopting the above technical scheme, the contact switch is connected to the inner wall of the slide groove near the oil passing pan, and the elastic force of the pressing elastic member drives the sealing ring to slide in the direction away from the sealing chamber. When the surface where the pressing elastic member abuts against the oil passing pan is worn, the elastic force of the pressing elastic member drives the sealing ring to slide in the direction away from the sealing chamber, and the sealing ring abuts against the surface of the oil passing pan to form a seal; when the contact switch abuts against the slider and is turned on, the warning horn is energized and makes a sound, thereby realizing the fault judgment on the sealing between the oil passing pan and the oil distribution pan, and realizing the identification of the health status of the high-stability hydraulic motor, thereby warning the staff to replace the sealing ring in time, further ensuring the sealing stability between the oil distribution pan and the oil passing pan, making it difficult for the hydraulic oil to overflow from the connection between the oil passing pan and the oil distribution pan, ensuring the normal use of the high-stability hydraulic motor, and thus extending the service life of the high-stability hydraulic motor.

[0013] Optionally, the sealing ring includes a thermal expansion and contraction part and a sealing part, the thermal expansion and contraction part is connected to the sealing part, the surface of the thermal expansion and contraction part away from the sealing part can be pressed against the surface of the oil pan, and the surface of the sealing part away from the thermal expansion and contraction part is connected to the pressing elastic part.

[0014] By adopting the above technical scheme, the thermal expansion and contraction part is connected to the sealing part, and the surface of the sealing part away from the thermal expansion and contraction part is connected to the pressing elastic member, and the surface of the thermal expansion and contraction part away from the sealing part can press against the surface of the oil passing pan, and the surface of the thermal expansion and contraction part is in sliding contact with the surface of the oil passing pan. Part of the kinetic energy of the thermal expansion and contraction part is converted into thermal energy, and the thermal expansion and contraction part heats up and expands, and the air pressure in the sealing chamber increases. The air pressure in the sealing chamber drives the surface of the thermal expansion and contraction part to press against the surface of the oil passing pan to form a seal, so that the thermal expansion and contraction part is not easy to separate from the surface of the oil passing pan, thereby ensuring the sealing stability between the oil passing pan and the oil distribution pan.

[0015] Optionally, the sealed cavity is used for storing coolant.

[0016] By adopting the above technical solution, the coolant is stored in the sealing cavity. When the sealing part slides on the inner wall of the sealing cavity, the sealing part converts part of the kinetic energy into thermal energy, the sealing part heats up, and the coolant and the sealing part exchange heat to achieve cooling of the sealing part, making it difficult for the sealing part to operate in a high temperature state for a long time, thereby ensuring the sealing stability of the sealing part.

[0017] Optionally, a cooling cavity is provided on a surface of the sealing portion away from the thermal expansion and contraction portion, and the cooling cavity is connected to the sealing cavity.

[0018] By adopting the above technical solution, the cooling cavity is connected to the sealing cavity, and the coolant in the sealing cavity enters the cooling cavity. The coolant and the inner wall of the cooling cavity exchange heat, thereby increasing the contact area between the sealing part and the coolant, further improving the cooling effect on the sealing part, and making the sealing part less likely to be worn due to long-term operation in a high temperature state, thereby extending the service life of the sealing part.

[0019] Optionally, the inner wall of the cooling chamber is connected to a driving piston, the inner wall of the sealing chamber is provided with a sliding chamber for the driving piston to slide, and the inner wall of the sealing chamber is provided with a connecting chamber, and the connecting chamber is connected to the sliding chamber.

[0020] By adopting the above technical solution, the driving piston slides on the inner wall of the sliding cavity, and the connecting cavity is connected to the sliding cavity. When the thermal expansion and contraction part heats up and expands, the sealing part is driven to slide in the direction close to the sliding cavity, driving the driving piston to slide on the inner wall of the sliding cavity, driving the coolant in the connecting cavity to enter the sealing cavity, promoting the flow of the coolant in the sealing cavity, making the surface of the sealing part fully contact with the coolant, ensuring that the sealing part and the coolant are fully in contact, and further improving the cooling efficiency of the sealing part.

[0021] Optionally, a circulation cavity is opened on the inner wall of the sealing cavity, and the circulation cavity is connected to the sliding cavity. The inner wall of the circulation cavity is connected to a one-way valve 1, and the one-way valve 1 supplies the coolant in the sealing cavity to enter the circulation cavity. The inner wall of the connecting cavity is connected to a one-way valve 2, and the one-way valve 2 supplies the coolant in the connecting cavity to enter the sealing cavity.

[0022] By adopting the above technical scheme, the sliding chamber connects the circulation chamber and the connecting chamber, the one-way valve 1 is connected to the inner wall of the circulation chamber, the one-way valve 1 supplies the coolant in the sealing chamber to enter the circulation chamber, the one-way valve 2 is connected to the inner wall of the connecting chamber, the one-way valve 2 supplies the coolant in the connecting chamber to enter the sealing chamber, when the driving piston slides in the direction close to the sliding chamber, the pressure in the sliding chamber increases, driving the coolant in the connecting chamber to enter the sealing chamber; when the driving piston slides in the direction away from the sliding chamber, the pressure in the sliding chamber decreases, driving the coolant in the sealing chamber to enter the circulation chamber, thereby ensuring the circulation of the coolant in the sealing chamber, making the surface of the sealing part fully contact with the coolant, and further improving the cooling stability of the sealing part.

[0023] Optionally, the oil distribution plate is connected to a warning component, which includes a pressure sensor, a controller and a warning light. The pressure sensor is connected to the inner wall of the sealed cavity, and the pressure sensor can detect the hydraulic value in the sealed cavity. The warning light is connected to the surface of the oil distribution plate. The controller is connected between the pressure sensor and the warning light, and the controller can receive the hydraulic value of the pressure sensor and control the opening and closing of the warning light.

[0024] By adopting the above technical scheme, the pressure sensor can detect the hydraulic value in the sealed chamber, the early warning light is connected to the surface of the oil pan, and the controller is connected between the pressure sensor and the early warning light. The pressure sensor can detect the hydraulic value in the sealed chamber and send the hydraulic value to the controller. The hydraulic value is compared with the preset value. When the hydraulic value is greater than the preset value, the controller drives the early warning light to power on and illuminate, thereby alerting the staff to the excessive operation of the high-stability hydraulic motor, realizing pre-failure judgment of the high-stability hydraulic motor, and keeping the high-stability hydraulic motor running in a healthy state.

[0025] Optionally, a liquid inlet channel is provided on the surface of the oil distribution plate, the liquid inlet channel connects the circulation chamber, the sliding chamber and the connecting chamber, and a cover plate for closing the liquid inlet channel is embedded on the inner wall of the liquid inlet channel facing the oil distribution plate.

[0026] By adopting the above technical solution, the coolant is filled into the circulation chamber, the sliding chamber and the connecting chamber through the liquid inlet channel. At the same time, the cover plate covers the liquid inlet channel, and the circumferential outer wall of the cover plate presses against the inner wall of the liquid inlet channel and closes the liquid inlet channel, so that the coolant in the liquid inlet channel is not easy to leak out, thereby realizing the closure of the liquid inlet channel.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The sealing ring and the tightening elastic member are arranged. The elastic force of the tightening elastic member drives the sealing ring surface to be difficult to separate from the oil through pan, thereby achieving the sealing stability between the oil through pan and the oil distribution pan, making it difficult for the hydraulic oil to overflow from the connection between the oil through pan and the oil distribution pan, ensuring the normal use of the high-stability hydraulic motor, thereby extending the service life of the high-stability hydraulic motor;

[0029] 2. The setting of the contact switch and the warning horn can realize the fault judgment on the sealing between the oil pan and the oil distribution pan, and realize the identification of the health status of the high-stability hydraulic motor, so as to warn the staff to replace the sealing ring in time, further ensure the sealing stability between the oil distribution pan and the oil pan, and make it difficult for the hydraulic oil to overflow from the connection between the oil pan and the oil distribution pan, so as to ensure the normal use of the high-stability hydraulic motor, thereby extending the service life of the high-stability hydraulic motor;

[0030] 3. The setting of the sealing part and the thermal expansion and contraction part increases the air pressure in the sealing cavity. The air pressure in the sealing cavity drives the surface of the thermal expansion and contraction part to press against the surface of the oil through pan to form a seal, making it difficult for the thermal expansion and contraction part to separate from the surface of the oil through pan, thereby ensuring the sealing stability between the oil through pan and the oil distribution pan. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0032] Figure 2It is a partial cross-sectional view in an embodiment of the present application, mainly showing the crankshaft.

[0033] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0034] Figure 4 It is a schematic diagram of the overall structure of the sealing assembly in the embodiment of the present application.

[0035] Explanation of the reference numerals: 1. Shell; 2. Shell cover; 3. Oil pan; 4. Oil distribution pan; 41. Sealing chamber; 42. Slide groove; 43. Sliding chamber; 44. Connecting chamber; 45. Circulation chamber; 46. Liquid inlet channel; 5. Crankshaft; 6. Sealing assembly; 61. Sealing ring; 611. Thermal expansion and contraction portion; 612. Sealing portion; 613. Cooling chamber; 62. Elastic member; 7. Sliding block; 8. Detection assembly; 81. Contact switch; 82. Warning horn; 9. Driving piston; 10. One-way valve 1; 11. One-way valve 2; 12. Warning assembly; 121. Pressure sensor; 122. Warning light; 13. Cover plate. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-4 This application is described in further detail.

[0037] The present application embodiment discloses a high stability hydraulic motor. Figure 1 and Figure 2 The high-stability hydraulic motor includes a housing 1, a housing cover 2, an oil pan 3 and an oil distribution plate 4. The housing 1 is fixed to the housing cover 2 by bolts. A crankshaft 5 is rotatably connected to the housing cover 2. The oil distribution plate 4 is fixed to the crankshaft 5. The oil pan 3 is fixed to the housing cover 2 by bolts. The oil pan 3 covers the oil distribution plate 4, and the surface of the oil distribution plate 4 is in sliding contact with the surface of the oil pan 3.

[0038] Reference Figure 3 and Figure 4 , the oil distribution plate 4 is connected with a sealing assembly 6, which can seal the connection between the oil pan 3 and the oil distribution plate 4. The sealing assembly 6 includes a sealing ring 61 and a pressing elastic member 62, and the sealing ring 61 includes a thermal expansion and contraction portion 611 and a sealing portion 612. The thermal expansion and contraction portion 611 can be made of rubber or nylon. In the embodiment of the present application, the thermal expansion and contraction portion 611 is made of nylon, which has a certain thermal expansion coefficient; in the embodiment of the present application, the thermal expansion and contraction portion 611 and the sealing portion 612 are both circular rings, and the thermal expansion and contraction portion 611 and the sealing portion 612 are coaxially fixed; the pressing elastic member 62 can be a compression spring or a tension spring. In the embodiment of the present application, the pressing elastic member 62 is a compression spring, which has a certain deformation capacity.

[0039] Reference Figure 3A sealing cavity 41 for accommodating a sealing ring 61 is provided on the surface of the oil distribution plate 4 facing the oil passing plate 3. The sealing cavity 41 surrounds the crankshaft 5. One end of the elastic member 62 in the elastic direction is fixed on the sealing cavity 41, and the other end of the elastic member 62 in the elastic direction is fixed on the surface of the sealing portion 612. The elastic member 62 has an elastic force that drives the sealing portion 612 to slide in a direction away from the sealing cavity 41, and the surface of the thermal expansion and contraction portion 611 can press against the surface of the oil passing plate 3 to form a sealing tendency.

[0040] Reference Figure 3 A slider 7 is fixed to the outer ring of the sealing part 612, and a slide groove 42 for the slider 7 to slide is opened on the inner wall of the sealing cavity 41. When the sealing part 612 slides on the inner wall of the sealing cavity 41, the slider 7 is driven to slide on the inner wall of the slide groove 42, so that the sealing part 612 is not easily offset in the sealing cavity 41, thereby ensuring the stability of the sealing part 612 sliding in the sealing cavity 41.

[0041] Reference Figure 1 and Figure 3 , the oil distribution plate 4 is connected with a detection component 8, which can detect the wear of the thermal expansion and contraction part 611. The detection component 8 includes a contact switch 81 and a warning horn 82. The contact switch 81 is fixed on the inner wall of the slide groove 42 close to the oil pan 3. The warning horn 82 is fixed to the surface of the oil pan 3 by bolts. The warning horn 82 and the contact switch 81 are electrically connected. When the elastic force of the pressing elastic member 62 drives the sealing part 612 to slide away from the sealing cavity 41, the surface of the thermal expansion and contraction part 611 is driven to press against the end face of the oil pan 3 to form a seal. The surface of the thermal expansion and contraction part 611 is in sliding contact with the surface of the oil pan 3, which makes the thermal expansion and contraction part 611 prone to wear when it runs for a long time. The pressing elastic member 62 continues to drive the sealing part 612 away from the sealing cavity. The sealing ring 61 slides in the direction of the sealing cavity 41, and the surface of the thermal expansion and contraction portion 611 is pressed against the surface of the oil pan 3 to form a seal, and at the same time, the slider 7 is driven to slide in the direction close to the contact switch 81. The contact switch 81 abuts against the slider 7 and is turned on, and the warning horn 82 is energized and makes a sound, thereby alerting the staff to replace the sealing ring 61 in time, and realize the fault judgment on the sealing between the oil pan 3 and the oil distribution plate 4, so that the health status of the high-stability hydraulic motor is more accurate, and the hydraulic oil is not easy to overflow from the connection between the oil pan 3 and the oil distribution plate 4, thereby ensuring the normal use of the high-stability hydraulic motor and extending the service life of the high-stability hydraulic motor.

[0042] Reference Figure 3The sealing cavity 41 can store coolant, which can be oil or water. In the embodiment of the present application, the coolant is water, which has a high specific heat capacity. A cooling cavity 613 is provided on the surface of the sealing cloth away from the thermal expansion and contraction cloth. The cooling cavity 613 is connected to the sealing cavity 41. The coolant in the sealing cavity 41 can enter the cooling cavity 613. When the sealing part 612 slides on the inner wall of the sealing cavity 41 for a long time, the sealing part 612 converts part of the kinetic energy into heat energy, the sealing part 612 heats up, and the coolant in the sealing cavity 41 enters the cooling cavity 613. The coolant is in full contact with the inner wall of the cooling cavity 613, increasing the contact area between the sealing part 612 and the coolant, allowing the sealing part 612 and the coolant to exchange heat, making the sealing part 612 less likely to heat up and wear, thereby ensuring the stability of the operation of the sealing part 612.

[0043] Reference Figure 3 A driving piston 9 is fixed on the inner wall of the cooling chamber 613. The material of the driving piston 9 may be rubber or silicone. In the embodiment of the present application, the material of the driving piston 9 is rubber, which has a certain deformation ability. A sliding chamber 43 for sliding the driving piston 9 is provided on the inner wall of the sealing chamber 41. The sliding direction of the driving piston 9 and the sliding direction of the sealing ring 61 are parallel to each other. A connecting chamber 44 is provided on the inner wall of the sealing chamber 41. The connecting chamber 44 is connected to the sliding chamber 43. A circulating chamber 45 is provided on the inner wall of the sealing chamber 41. The circulating chamber 45 is connected to the sliding chamber 43. A one-way valve 10 is fixed on the inner wall of the circulating chamber 45. The one-way valve 10 supplies the cooling liquid in the sealing chamber 41 to enter the circulating chamber 45. A one-way valve 2 11 is fixed on the inner wall of the connecting chamber 44. The one-way valve 2 11 supplies the cooling liquid in the circulating chamber 45 to enter the sealing chamber 41.

[0044] Reference Figure 3 When the thermal expansion and contraction part 611 is in sliding contact with the surface of the oil pan 3 for a long time, the thermal expansion and contraction part 611 converts part of the kinetic energy into thermal energy, and the thermal expansion and contraction part 611 heats up and expands, driving the sealing part 612 to slide on the inner wall of the sealing chamber 41, driving the driving piston 9 to slide on the inner wall of the sliding chamber 43, and the pressure in the sliding chamber 43 increases. The sliding chamber 43 is connected to the connecting chamber 44, and the coolant in the connecting chamber 44 enters the sealing chamber 41 through the one-way valve 11; when the thermal expansion and contraction part 611 cools down and contracts, it drives the driving piston 9 to slide on the inner wall of the sliding chamber 43. The piston 9 slides on the inner wall of the sliding chamber 43, the pressure in the sliding chamber 43 decreases, and the sliding chamber 43 is connected to the circulation chamber 45, driving the coolant in the sealing chamber 41 to enter the circulation chamber 45 through the one-way valve 10, so that the coolant in the sealing chamber 41 flows, and the coolant in the sealing chamber 41 is fully in contact with the surface of the sealing part 612. The sealing part 612 and the coolant in the sealing chamber 41 exchange heat, so that the sealing part 612 is not easy to operate in a high temperature state, thereby ensuring the sealing stability of the sealing ring 61.

[0045] Reference Figure 1 and Figure 3, the oil distribution plate 4 is connected with an early warning component 12, which can detect the hydraulic pressure in the sealed chamber 41. The early warning component 12 includes a pressure sensor 121, a controller and an early warning light 122. The pressure sensor 121 is fixed on the inner wall of the sealed chamber 41. The pressure sensor 121 can detect the hydraulic pressure value in the sealed chamber 41. The early warning light 122 is fixed on the surface of the oil-passing plate 3. The controller is connected between the pressure sensor 121 and the early warning light 122. The controller is provided with a preset value. The pressure sensor 121 can detect the hydraulic pressure value in the sealed chamber 41 and send it to the controller. The controller compares the hydraulic pressure value with the preset value. When the hydraulic pressure value is greater than the preset value, the controller drives the early warning light 122 to be energized, and the early warning light 122 is energized and illuminated, thereby alerting the staff to release the hydraulic pressure in the sealed chamber 41 in time, so that the high-stability hydraulic motor is not easily damaged by overload operation, and the health status of the high-stability hydraulic motor is recognized, and the accuracy of the pre-failure judgment of the high-stability hydraulic motor is improved.

[0046] Reference Figure 3 A liquid inlet channel 46 is provided on the surface of the oil distribution plate 4 facing the oil passing plate 3. The liquid inlet channel 46 connects the circulation chamber 45, the sliding chamber 43 and the connecting chamber 44. The coolant fills the circulation chamber 45, the sliding chamber 43 and the connecting chamber 44 in sequence through the liquid inlet channel 46, thereby realizing stable liquid injection into the circulation chamber 45, the sliding chamber 43 and the connecting chamber 44. The liquid inlet channel 46 is rotatably connected to the inner wall of the oil passing plate 3 with a cover plate 13. When the cover plate 13 rotates in a direction close to the liquid inlet channel 46, the circumferential outer wall of the cover plate 13 presses against the inner wall of the liquid inlet channel 46 and closes the liquid inlet channel 46, so that the coolant in the liquid inlet channel 46 is not easy to flow out, thereby improving the stability of the coolant storage in the liquid inlet channel 46.

[0047] Reference Figure 3 A torsion spring is connected to the rotating shaft of the cover plate 13. The torsion spring has an elastic force to drive the cover plate 13 to rotate in the direction close to the liquid inlet channel 46, and the circumferential outer wall of the cover plate 13 presses against the inner wall of the liquid inlet channel 46 to form a sealing tendency.

[0048] The implementation principle of a high-stability hydraulic motor in an embodiment of the present application is as follows: one end of the elastic force direction of the tightening elastic member 62 is connected to the inner wall of the sealing chamber 41, and the other end of the elastic force direction of the tightening elastic member 62 is connected to the sealing ring 61. The elastic force of the tightening elastic member 62 drives the sealing ring 61 to slide in the direction away from the sealing chamber 41, and the sealing ring 61 presses against the surface of the oil passing pan 3. The elastic force of the tightening elastic member 62 drives the surface of the sealing ring 61 to be difficult to separate from the oil passing pan 3, thereby achieving the sealing stability between the oil passing pan 3 and the oil distribution pan 4, making it difficult for the hydraulic oil to overflow from the connection between the oil passing pan 3 and the oil distribution pan 4, thereby ensuring the normal use of the high-stability hydraulic motor and thus extending the service life of the high-stability hydraulic motor.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-stability hydraulic motor, comprising a housing (1), a housing cover (2), an oil-passing pan (3) and an oil distribution pan (4), wherein the housing (1) is connected to the housing cover (2), a crankshaft (5) is rotatably connected to the housing cover (2), the oil distribution pan (4) is connected to the crankshaft (5), the oil-passing pan (3) is connected to the housing cover (2), and the oil-passing pan (3) covers the oil distribution pan (4); characterized in that: The oil distribution plate (4) is connected to a sealing assembly (6), the sealing assembly (6) comprising a sealing ring (61) and a pressing elastic member (62); a sealing cavity (41) for accommodating the sealing ring (61) is provided on a surface of the oil distribution plate (4) facing the oil passage plate (3); one end of the pressing elastic member (62) in the elastic direction is connected to the sealing ring (61), and the other end of the pressing elastic member (62) in the elastic direction is connected to the inner wall of the sealing cavity (41); the pressing elastic member (62) has a tendency to cause the sealing ring (61) to slide in a direction away from the sealing cavity (41); the sealing ring (61) comprises a thermal expansion and contraction portion (611) and a sealing portion (612); the thermal expansion and contraction portion (611) is connected to the sealing portion (612) The surface of the thermal expansion and contraction part (611) away from the sealing part (612) can be pressed against the surface of the oil pan (3), and the surface of the sealing part (612) away from the thermal expansion and contraction part (611) is connected to the pressing elastic member (62); the sealing cavity (41) is used to store cooling liquid; the surface of the sealing part (612) away from the thermal expansion and contraction part (611) is provided with a cooling cavity (613), and the cooling cavity (613) is connected to the sealing cavity (41); the inner wall of the cooling cavity (613) is connected to the driving piston (9), the inner wall of the sealing cavity (41) is provided with a sliding cavity (43) for the driving piston (9) to slide, and the inner wall of the sealing cavity (41) is provided with a connecting cavity (44), and the connecting cavity (44) is connected to the sliding cavity (43).

2. The high stability hydraulic motor according to claim 1, characterized in that: The surface of the sealing ring (61) is connected to a slider (7), the inner wall of the sealing cavity (41) is provided with a sliding groove (42) for the slider (7) to slide, and the sliding direction of the slider (7) and the elastic force direction of the pressing elastic member (62) are parallel to each other.

3. The high stability hydraulic motor according to claim 2, characterized in that: The oil distribution plate (4) is connected to a detection assembly (8), the detection assembly (8) comprising a contact switch (81) and a warning horn (82), the contact switch (81) being connected to the inner wall of the slide groove (42) close to the oil passage plate (3), the warning horn (82) being connected to the outer wall of the oil passage plate (3), the contact switch (81) and the warning horn (82) being electrically connected, when the elastic force of the abutting elastic member (62) drives the sealing ring (61) to slide in a direction away from the sealing chamber (41), the contact switch (81) abuts against the slider (7) and is turned on, and the warning horn (82) is energized to emit a sound.

4. The high stability hydraulic motor according to claim 1, characterized in that: The inner wall of the sealing cavity (41) is provided with a circulation cavity (45), the circulation cavity (45) is connected to the sliding cavity (43), the inner wall of the circulation cavity (45) is connected to a one-way valve (10), the one-way valve (10) allows the cooling liquid in the sealing cavity (41) to enter the circulation cavity (45), and the inner wall of the connecting cavity (44) is connected to a one-way valve (11), the one-way valve (11) allows the cooling liquid in the connecting cavity (44) to enter the sealing cavity (41).

5. The high stability hydraulic motor according to claim 4, characterized in that: The oil distribution plate (4) is connected to an early warning component (12), and the early warning component (12) comprises a pressure sensor (121), a controller and an early warning light (122). The pressure sensor (121) is connected to the inner wall of the sealed cavity (41), and the pressure sensor (121) is capable of detecting the hydraulic pressure value in the sealed cavity (41). The early warning light (122) is connected to the surface of the oil distribution plate (3). The controller is connected between the pressure sensor (121) and the early warning light (122), and the controller is capable of receiving the hydraulic pressure value of the pressure sensor (121) and controlling the opening and closing of the early warning light (122).

6. The high stability hydraulic motor according to claim 4, characterized in that: The surface of the oil distribution plate (4) is provided with a liquid inlet channel (46), the liquid inlet channel (46) being connected to the circulation chamber (45), the sliding chamber (43) and the connecting chamber (44), and the inner wall of the liquid inlet channel (46) facing the oil passage plate (3) is embedded with a cover plate (13) for closing the liquid inlet channel (46).

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