Torque adjustment device for electric actuator

Abstract

The present application relates to torque adjustment technical field, disclose a kind of electric actuator's torque adjusting device, including electric actuator and the positioning frame of installation its surface.The present application is cooperated by vertical plate, press bar, plugging block and so on, realize the automatic start-stop of lubricating oil supply, and when support slides to the lowest point of adjusting groove, lubricating oil is automatically connected and supplied;Sliding to the highest point, lubricating oil supply is automatically stopped, avoid lubricating oil waste, simultaneously, the supply amount of lubricating oil can be synchronously self-adapting adjustment with torque adjustment condition, the more the larger the gear engagement surface is, and vice versa is reduced;And the arc-shaped guide rail of adjusting roller side wall is adapted with gear torque adjustment structure, the wider groove corresponding guide rail is closer to the outside of adjusting roller, through the cooperation of connecting rod, the vertical position of injection pipe can be synchronously adjusted with gear engagement condition, ensure that injection pipe oil outlet is always accurately aligned with the gear engagement tooth position.

Description

Technical Field

[0001] This invention belongs to the field of torque regulation technology, and more specifically, relates to a torque regulation device for an electric actuator. Background Technology

[0002] Electric actuators, as core mechatronic devices in the field of automation control, primarily convert electrical energy into mechanical motion to achieve automatic control of equipment such as valves and baffles. They are widely used in various fields such as chemical engineering, drainage, and industrial automation. Their torque regulation accuracy and operational stability directly determine the operating efficiency and reliability of the entire automation control system. In practical industrial applications, different working conditions place significant differences in the torque output requirements of electric actuators. Therefore, torque regulation has become one of the core performance characteristics of electric actuators. The gear transmission system, as a key component for torque transmission, directly affects the degree of wear, failure rate, and service life of the equipment due to its lubrication effect.

[0003] Currently, the torque adjustment devices of existing electric actuators also rely on gear transmission for torque adjustment. That is, by selecting gears of different diameters for meshing and using the difference in transmission ratio of gears of different diameters, the output torque is adjusted to meet the torque requirements under different working conditions.

[0004] However, in the adjusted lubrication process, although some self-lubricating structures can achieve automatic replenishment of lubricating oil, it is difficult to adaptively adjust the lubrication supply according to the torque adjustment. This is because gears of different diameters have significant differences in meshing surface size and transmission load. The larger the diameter of the gear, the larger the meshing surface and the higher the transmission load, and the greater the corresponding lubrication demand. Conversely, when switching to meshing with a smaller diameter gear, the lubrication supply cannot be reduced accordingly, which can easily lead to lubrication redundancy and make it impossible to achieve precise matching between the lubrication amount and the gear operating state, resulting in uneven lubrication.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A torque adjustment device for an electric actuator includes an electric actuator and a positioning frame mounted on its surface. A gear torque adjustment system is installed inside the positioning frame and is interconnected with the electric actuator.

[0007] An adjusting roller is rotatably installed inside the positioning frame, and an adjusting groove is provided on the adjusting roller. The adjusting groove is composed of several pairs of grooves with different widths. A bracket is slidably installed on the adjusting groove, and the bracket is connected to the gear torque adjustment system. The groove is used to drive gears of different diameters on the gear torque adjustment system to adapt to the gears of the electric actuator. A lubricating oil tank is provided on the positioning frame, and a sealing sleeve is installed at the bottom of the lubricating oil tank. A compression sleeve is installed at the bottom of the sealing sleeve. An injection pipe is installed on the side wall of the compression sleeve. The injection pipe is used to spray lubricating oil onto the meshing gears. A guide rail is installed on the side wall of the adjusting roller. The wider the groove, the closer the guide rail is to the outside of the adjusting roller. A connecting rod slides on the guide rail. The connecting rod is used to adjust the vertical position of the injection pipe so that the oil outlet is aligned with the teeth. The compression sleeve is equipped with a piston for squeezing and moving lubricating oil, and the piston's movement distance is limited by a bracket to control the spray volume.

[0008] In a preferred embodiment of the present invention, a drive motor is provided in the inner cavity of the positioning frame, and the bottom shell of the drive motor is connected to the boss installed on the positioning frame. A transmission shaft is installed at the output end of the drive motor, and the transmission shaft is connected to the rotation center of the adjusting roller. A positioning seat is rotatably installed on the transmission shaft, and the bottom of the positioning seat is installed on the positioning frame.

[0009] In a preferred embodiment of the present invention, a slider is slidably disposed on the adjusting groove, a limiting rod is movably installed inside the slider, and limiting seats are installed at both ends of the limiting rod. The side walls of the limiting seats are welded to the positioning frame. The top of the slider is connected to the bracket, and a connecting flange is installed on the bracket. The connecting flange is connected to the gear torque adjustment system.

[0010] In a preferred embodiment of the present invention, the outer wall of the lubricating oil drum is provided with an observation window, and the observation window is engraved with scale lines indicating the content. The top of the lubricating oil drum is equipped with a cover plate, and the connection between the lubricating oil drum and the sealing sleeve is conical.

[0011] In a preferred embodiment of the present invention, a vertical plate is installed on the bracket, a pressure rod is installed on the side wall of the vertical plate, and the pressure rod passes through the end of the sealing sleeve. A sealing block is installed at the end of the pressure rod, and the sealing block is slidably disposed inside the sealing sleeve. A through hole is opened on the sealing block. When the bracket slides to the lowest point in the adjustment groove, the through hole is used to connect the compression sleeve and the lubricating oil tank. When the bracket slides to the highest point in the adjustment groove, the sealing block and the material discharge position of the sealing sleeve are sealed.

[0012] In a preferred embodiment of the present invention, a guide frame is installed on the bottom side wall of the connecting rod, and a ball bearing is installed at the end of the guide frame. The ball bearing is in contact with the surface of the guide rail. The guide rail is arc-shaped. A horizontal plate is movably installed through the side wall of the connecting rod, and the horizontal plate is installed on the side wall of the positioning frame.

[0013] In a preferred embodiment of the present invention, a baffle is installed on the outer wall of the connecting rod, and a compression spring is also sleeved on the outer wall of the connecting rod. One end of the compression spring is engaged with the baffle, and the top of the compression spring is engaged with the side wall of the horizontal plate. The compression spring is used to drive the ball to always fit against the guide rail when no external force is applied.

[0014] In a preferred embodiment of the present invention, a connecting frame is installed on the top of the connecting rod. The connecting frame is arched, and the end of the connecting frame corresponds to the surface of the injection tube.

[0015] In a preferred embodiment of the present invention, a rod is installed through the interior of the vertical plate. A support frame is installed at one end of the rod, and the support frame is movably connected to the end of the compression sleeve. The end of the support frame is connected to the end of the piston. A push rod is installed at the other end of the rod, and the push rod is movably connected to the side wall of the positioning frame. A fixed seat is installed on the positioning frame, and the fixed seat is movably connected to the rod. A return spring is sleeved on the outer wall of the rod. One end of the return spring is engaged with the side wall of the push rod, and the other end of the return spring is engaged with the fixed seat.

[0016] In a preferred embodiment of the present invention, a strip groove is provided on the vertical plate, the insertion rod is inserted into the strip groove, and a protrusion is installed on the insertion rod, the diameter of the protrusion being larger than the diameter of the strip groove, and the protrusion limiting the movement distance of the insertion rod.

[0017] Compared with the prior art, the present invention has the following advantages: This invention achieves automatic start and stop of lubricant supply through the cooperation of structures such as vertical plates, pressure rods, and sealing blocks. When the bracket slides to the lowest point of the adjustment groove, the lubricant supply is automatically connected; when it slides to the highest point, the lubricant supply is automatically stopped, avoiding lubricant waste. At the same time, the amount of lubricant supplied can be adaptively adjusted synchronously with the torque adjustment. The larger the gear meshing surface, the more lubrication is supplied, and vice versa. Furthermore, the arc-shaped guide rail on the side wall of the adjustment roller is adapted to the gear torque adjustment structure. The wider the groove, the closer the guide rail is to the outside of the adjustment roller. Through the cooperation of the connecting rod, the vertical position of the injection pipe can be adjusted synchronously with the gear meshing, ensuring that the oil outlet of the injection pipe is always accurately aligned with the teeth of the gear meshing. The combination of these two factors achieves sufficient and precise lubrication, reduces uneven lubrication, effectively reduces gear wear, lowers the equipment failure rate, extends the overall service life of the device, further ensures the smoothness of gear transmission, and improves the operational stability of the device.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram: Figure 1A three-dimensional diagram of a torque adjustment device for an electric actuator; Figure 2 A cross-sectional view of the positioning frame of a torque adjustment device for an electric actuator; Figure 3 A schematic diagram of the internal structure of the positioning frame of a torque adjustment device for an electric actuator; Figure 4 A torque regulating device for an electric actuator Figure 3 Enlarged view of point A in the middle; Figure 5 A torque regulating device for an electric actuator Figure 3 Bottom view; Figure 6 A torque regulating device for an electric actuator Figure 5 Enlarged view at point B in the middle; Figure 7 A cross-sectional view of the lubricating oil tank of a torque regulating device for an electric actuator; Figure 8 A torque regulating device for an electric actuator Figure 7 Enlarged view of point C.

[0020] In the picture: 1. Electric actuator; 2. Positioning frame; 3. Drive motor; 4. Transmission shaft; 5. Adjusting roller; 6. Adjusting groove; 7. Slider; 8. Bracket; 9. Connecting flange; 10. Limiting rod; 11. Limiting seat; 12. Positioning seat; 13. Lubricating oil tank; 14. Cover plate; 15. Observation window; 16. Sealing sleeve; 17. Compression sleeve; 18. Injection pipe; 19. Piston; 20. Support frame; 21. Insert rod; 22. Push rod; 23. Fixed seat; 24. Return spring; 25. Guide rail; 26. Connecting rod; 27. Guide frame; 28. Ball bearing; 29. ​​Horizontal plate; 30. Baffle; 31. Compression spring; 32. Connecting frame; 33. Vertical plate; 34. Pressure rod; 35. Sealing block; 36. Through hole; 37. Protrusion. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0022] Example 1: like Figures 1 to 8 As shown, a torque adjustment device for an electric actuator includes an electric actuator 1 and a positioning frame 2 mounted on its surface. A gear torque adjustment system is installed inside the positioning frame 2 and is connected to the electric actuator 1.

[0023] An adjusting roller 5 is rotatably installed inside the positioning frame 2, and an adjusting groove 6 is provided on the adjusting roller 5. The adjusting groove is composed of several pairs of grooves with different widths. A bracket 8 is slidably installed on the adjusting groove 6, and the bracket 8 is connected to the gear torque adjustment system. The groove is used to drive gears of different diameters on the gear torque adjustment system to adapt to the gears of the electric actuator. A lubricating oil tank 13 is provided on the positioning frame 2, and a sealing sleeve 16 is installed at the bottom of the lubricating oil tank 13. A compression sleeve 17 is installed at the bottom of the sealing sleeve 16. An injection pipe 18 is installed on the side wall of the compression sleeve 17. The injection pipe 18 is used to spray lubricating oil onto the meshing gears. A guide rail 25 is installed on the side wall of the adjusting roller 5. The wider the groove, the closer the guide rail is to the outside of the adjusting roller 5. A connecting rod 26 slides on the guide rail 25. The connecting rod 26 is used to adjust the vertical position of the injection pipe so that the oil outlet is aligned with the teeth. The compression sleeve 17 is equipped with a piston 19 for squeezing and moving lubricating oil, and the movement distance of the piston 19 is limited by the bracket 8 to control the spray volume.

[0024] like Figures 1 to 8 As shown, in a specific embodiment, a drive motor 3 is installed inside the positioning frame 2, and the bottom shell of the drive motor 3 is connected to the boss installed on the positioning frame 2. A transmission shaft 4 is installed at the output end of the drive motor 3, and the transmission shaft 4 is connected to the rotation center of the adjusting roller 5. A positioning seat 12 is rotatably installed on the transmission shaft 4, and the bottom of the positioning seat 12 is installed on the positioning frame 2. The drive motor 3 drives the transmission shaft 4 to rotate the adjusting roller 5. The positioning seat 12 can support and position the transmission shaft 4, preventing the transmission shaft 4 from shifting during rotation, ensuring the rotational stability and accuracy of the adjusting roller 5, and thus improving the reliability of torque adjustment.

[0025] like Figures 1 to 8 As shown, a slider 7 is slidably mounted on the adjusting groove 6. A limiting rod 10 is installed through the slider 7, and limiting seats 11 are installed at both ends of the limiting rod 10. The side walls of the limiting seats 11 are welded to the positioning frame 2. The top of the slider 7 is connected to the bracket 8, and a connecting flange 9 is installed on the bracket 8, which is connected to the gear torque adjustment system. This structure limits the sliding trajectory of the bracket 8 through the sliding cooperation between the slider 7 and the limiting rod 10, preventing the bracket 8 from deviating. The limiting seats 11 can fix the installation position of the limiting rod 10, ensuring the reliability of the limiting. The connecting flange 9 realizes a stable connection between the bracket 8 and the gear torque adjustment system, ensuring smooth power transmission and improving the accuracy of torque adjustment and transmission stability.

[0026] like Figures 1 to 8As shown, the outer wall of the lubricating oil tank 13 is further provided with an observation window 15, and the observation window 15 is engraved with scale lines indicating the content. A cover plate 14 is installed on the top of the lubricating oil tank 13, and the connection between the lubricating oil tank 13 and the sealing sleeve 16 is conical. Through the observation window 15 and the scale lines, the staff can easily observe the lubricating oil content in the lubricating oil tank 13 in real time, replenish the lubricating oil in time, and avoid the gear meshing transmission being affected by insufficient lubricating oil. The cover plate 14 can prevent dust and other impurities from entering the lubricating oil tank 13, ensuring the cleanliness of the lubricating oil and reducing gear wear. The conical connection can improve the sealing performance between the lubricating oil tank 13 and the sealing sleeve 16, further preventing lubricating oil leakage.

[0027] Example 2: The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a vertical plate 33 is installed on the bracket 8, and a pressure rod 34 is installed on the side wall of the vertical plate 33. The pressure rod 34 passes through the end of the sealing sleeve 16. A sealing block 35 is installed at the end of the pressure rod 34 and is slidably disposed inside the sealing sleeve 16. A through hole 36 is opened on the sealing block 35. When the bracket 8 slides to the lowest point in the adjusting groove 6, the through hole 36 is used to connect the compression sleeve 17 and the lubricating oil tank 13. When the bracket 8 slides to the highest point in the adjusting groove 6, the sealing block 35 and the material discharge position of the sealing sleeve 16 are sealed. The bracket 8 drives the vertical plate 33, the pressure rod 34 and the sealing block 35 to move synchronously. The opening and closing of the through hole 36 realizes the automatic start and stop of the lubricating oil supply without manual operation. It adapts to the synchronous requirements of torque adjustment, ensures the continuity and stability of gear meshing transmission, and improves the automation level of the device.

[0028] like Figures 1 to 8 As shown, in a specific embodiment, a guide frame 27 is installed on the bottom side wall of the connecting rod 26, and a ball bearing 28 is installed at the end of the guide frame 27. The ball bearing 28 contacts the surface of the guide rail 25, which is arc-shaped. A horizontal plate 29 is movably installed through the side wall of the connecting rod 26 and is mounted on the side wall of the positioning frame 2. Through the cooperation of the guide frame 27, the ball bearing 28, and the ball bearing 28, the sliding friction between the connecting rod 26 and the guide rail 25 is converted into rolling friction, reducing wear and improving transmission smoothness. The arc-shaped guide rail 25 can adapt to the rotation trajectory of the adjusting roller 5, while the horizontal plate 29 provides stable support and guidance for the connecting rod 26, ensuring smooth up and down sliding of the connecting rod 26, ensuring the accuracy of the position adjustment of the injection tube 18, and thus providing stable lubrication for gear meshing transmission and improving transmission efficiency.

[0029] like Figures 1 to 8As shown, a baffle 30 is further installed on the outer wall of the connecting rod 26, and a compression spring 31 is also sleeved on the outer wall of the connecting rod 26. One end of the compression spring 31 is engaged with the baffle 30, and the top of the compression spring 31 is engaged with the side wall of the horizontal plate 29. The compression spring 31 is used to drive the ball bearing 28 to always be in close contact with the guide rail 25 when there is no external force. A connecting frame 32 is installed on the top of the connecting rod 26. The connecting frame 32 is arched, and the end of the connecting frame 32 corresponds to the surface of the injection tube 18. This structure ensures that the ball bearing 28 is always in close contact with the guide rail 25 through the elastic force of the compression spring 31, avoiding transmission gaps that could cause deviations in the position adjustment of the injection tube 18. The baffle 30 is used to fix one end of the compression spring 31, and the arched connecting frame 32 can realize a stable connection between the connecting rod 26 and the injection tube 18, ensuring that the injection tube 18 can move synchronously with the connecting rod 26, thus improving the accuracy of lubrication spraying.

[0030] Example 3: The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a rod 21 is installed through the interior of the vertical plate 33. A support frame 20 is installed at one end of the rod 21, and the support frame 20 is movably connected to the end of the compression sleeve 17. The end of the support frame 20 is connected to the end of the piston 19. A push rod 22 is installed at the other end of the rod 21, and the push rod 22 is movably connected to the side wall of the positioning frame 2. A fixed seat 23 is installed on the positioning frame 2, and the fixed seat 23 is movably connected to the rod 21. A return spring 24 is sleeved on the outer wall of the rod 21. One end of the return spring 24 is engaged with the side wall of the push rod 22, and the other end is engaged with the fixed seat 23. The piston 19 is moved by the push rod 22, the rod 21, and the support frame 20 to achieve active control of lubricating oil spraying. The return spring 24 can drive the push rod 22, the rod 21, and the piston 19 to automatically return to their original positions, preparing for the next spraying. The fixed seat 23 guides the rod 21 to prevent it from shifting, improving the ease of operation and the stability of the device.

[0031] like Figures 1 to 8 As shown in the specific embodiment, a strip groove is formed on the vertical plate 33, and the insertion rod 21 is inserted into the strip groove. A protrusion 37 is installed on the insertion rod 21, and the diameter of the protrusion 37 is larger than the diameter of the strip groove. The protrusion 37 limits the movement distance of the insertion rod 21. The strip groove enables the sliding engagement between the insertion rod 21 and the vertical plate 33, adapting to the movement trajectory of the bracket 8. The protrusion 37 effectively limits the movement distance of the insertion rod 21, preventing excessive movement of the insertion rod 21 that could damage the piston 19 or cause excessive lubricating oil spraying, thus ensuring the service life and operational safety of the device.

[0032] The implementation principle of the torque adjustment device for an electric actuator of the present invention is as follows: In use, the electric actuator 1 provides basic power, which is connected to the gear torque adjustment system inside the positioning frame 2 to achieve basic transmission for torque adjustment. When it is necessary to adjust the torque of the electric actuator, the drive motor 3 installed inside the positioning frame 2 is started. The transmission shaft 4 at the output end of the drive motor 3 drives the adjusting roller 5 to rotate synchronously. The positioning seat 12 rotatably mounted on the transmission shaft 4 further supports and positions the transmission shaft 4 to prevent it from shifting during rotation.

[0033] The adjusting roller 5 has an adjusting groove 6 composed of several pairs of grooves of different widths. The slider 7, which is slidably mounted on the adjusting groove 6, slides along the limiting rod 10 to ensure the stability of the sliding trajectory of the slider 7. The bracket 8 connected to the top of the slider 7 moves synchronously with the slider 7. The connecting flange 9 on the bracket 8 drives the gear torque adjustment system to move synchronously. Since the grooves of different widths in the adjusting groove 6 correspond to gears of different diameters on the gear torque adjustment system, when the slider 7 drives the bracket 8 to slide to the position of the groove of different widths, it can drive the corresponding gear on the gear torque adjustment system to match the gear of the electric actuator 1, thereby realizing graded adjustment of torque and meeting the torque requirements under different working conditions.

[0034] Furthermore, during the rotation of the adjusting roller 5, the vertical plate 33 installed on the support 8 moves synchronously with the support 8. The pressure rod 34 on the side wall of the vertical plate 33 passes through the sealing sleeve 16. When the support 8 slides to the lowest point in the adjusting groove 6, the through hole 36 on the sealing block 35 at the end of the pressure rod 34 connects the compression sleeve 17 and the lubricating oil tank 13, and the lubricating oil can flow from the lubricating oil tank 13 into the compression sleeve 17. When the support 8 slides to the highest point in the adjusting groove 6, the sealing block 35 blocks the material discharge position of the sealing sleeve 16, stops the supply of lubricating oil, and realizes automatic control of the lubricating oil supply.

[0035] Next, the operator can press the push rod 22 that penetrates the side wall of the positioning frame 2, which will cause the insertion rod 21 connected to the push rod 22 to slide smoothly along the fixed seat 23. The fixed seat 23 provides precise guidance for the insertion rod 21, preventing it from shifting during movement. When the insertion rod 21 moves towards the compression sleeve 17 under the action of the push rod 22, it will simultaneously push the support frame 20 and the piston 19 to move inside the compression sleeve 17. The compression action of the piston 19 will push the lubricating oil in the compression sleeve 17 to the injection pipe 18, thereby completing the spraying of lubricating oil. After spraying, the push rod 22 is released, and the return spring 24 sleeved on the outside of the insertion rod 21 will generate elastic force, pushing the push rod 22 and the insertion rod 21 to reset, and driving the piston 19 back to the initial position, preparing for the next lubricating oil spraying, thus realizing convenient control and cyclic operation of lubricating oil spraying.

[0036] Furthermore, during the aforementioned process, as the bracket 8 moves along the adjusting groove 6 under the drive of the slider 7, it simultaneously drives the gear torque adjustment system to move, allowing gears of different diameters in the system to mesh with the gears of the electric actuator 1. Since gears of different diameters have different meshing surface sizes and transmission loads, their corresponding lubrication requirements also differ. For example, when the bracket 8 moves to the right, it drives a larger diameter gear in the gear torque adjustment system to mesh with the gears of the electric actuator 1. At this time, the gear meshing surface is larger, the transmission load is higher, and a larger amount of lubrication is required to ensure smooth meshing and reduce wear. Simultaneously, the vertical plate 33, which moves synchronously to the right with the bracket 8, increases the distance between itself and the protrusion 37 on the insert rod 21, thereby releasing part of the limitation on the movement distance of the insert rod 21. This increases the path for the insert rod 21 to drive the support frame 20 and piston 19, increasing the stroke of the piston 19 to squeeze the lubricating oil, thus spraying more lubricating oil onto the meshing large gear. Conversely, the spraying amount decreases accordingly.

[0037] Meanwhile, the guide rail 25 installed on the side wall of the adjusting roller 5 is arc-shaped, and the wider the groove, the closer the guide rail 25 is to the outside of the adjusting roller 5. This design is compatible with the gear torque adjustment, ensuring that the spraying position of the injection pipe 18 can be adjusted synchronously with the gear meshing. The ball 28 at the end of the bottom guide frame 27 of the connecting rod 26 is in contact with the surface of the guide rail 25. One end of the compression spring 31 on the outside of the connecting rod 26 is engaged with the baffle 30, and the other end is engaged with the horizontal plate 29. Under the elastic force of the compression spring 31, the ball 28 can always be in close contact with the guide rail 25, ensuring the stability of the transmission.

[0038] When the adjusting roller 5 rotates and drives the support 8 to move, the guide rail 25 synchronously drives the connecting rod 26 to slide up and down along the horizontal plate 29. This, in turn, drives the injection pipe 18 to adjust its vertical position via the arched connecting frame 32 at the top of the connecting rod 26. This ensures that the oil outlet of the injection pipe 18 is always aligned with the teeth of the meshing gears, adapting to the spraying requirements of different gear meshing. For example, when the support 8 moves to the right, driving the larger diameter gear in the gear torque adjustment system to mesh with the gear of the electric actuator 1, the wider groove corresponds to the guide rail 25 on the outer side of the adjusting roller 5. At this time, the guide rail 25 drives the connecting rod 26 to slide upwards, causing the injection pipe 18 to move upwards synchronously, so that the oil outlet is precisely aligned with the meshing teeth of the large gear. Combined with the increased lubrication volume mentioned above, this achieves sufficient and precise lubrication when the large gear meshes. This design effectively reduces gear wear and extends the service life of the device. The entire process achieves synchronous torque adjustment and automatic lubrication spraying and precise positioning, further improving the practicality and operational stability of the device.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A torque adjustment device for an electric actuator, comprising an electric actuator (1) and a positioning frame (2) mounted on its surface, wherein a gear torque adjustment system is installed inside the positioning frame (2), and the gear torque adjustment system is interconnected with the electric actuator (1), characterized in that: The positioning frame (2) is rotatably mounted with an adjusting roller (5), and the adjusting roller (5) is provided with an adjusting groove (6). The adjusting groove is composed of several pairs of grooves with different widths. A bracket (8) is slidably mounted on the adjusting groove (6), and the bracket (8) is connected to the gear torque adjustment system. The groove is used to drive gears of different diameters on the gear torque adjustment system to adapt to the gears of the electric actuator. The positioning frame (2) is provided with a lubricating oil tank (13), and a sealing sleeve (16) is installed at the bottom of the lubricating oil tank (13). A compression sleeve (17) is installed at the bottom of the sealing sleeve (16). An injection pipe (18) is installed on the side wall of the compression sleeve (17). The injection pipe (18) is used to spray lubricating oil onto the meshing gears. A guide rail (25) is installed on the side wall of the adjusting roller (5). The wider the groove, the closer the guide rail is to the outside of the adjusting roller (5). A connecting rod (26) slides on the guide rail (25). The connecting rod (26) is used to adjust the vertical position of the injection pipe so that the oil outlet is aligned with the teeth. The compression sleeve (17) is equipped with a piston (19) for squeezing and moving lubricating oil, and the movement distance of the piston (19) is limited by the bracket (8) to control the spray volume.

2. The torque adjustment device for an electric actuator according to claim 1, characterized in that, The inner cavity of the positioning frame (2) is provided with a drive motor (3), and the bottom shell of the drive motor (3) is connected to the boss installed on the positioning frame (2). The output end of the drive motor (3) is equipped with a transmission shaft (4), which is connected to the rotation center of the adjusting roller (5). A positioning seat (12) is rotatably installed on the transmission shaft (4), and the bottom of the positioning seat (12) is installed on the positioning frame (2).

3. The torque adjustment device for an electric actuator according to claim 1, characterized in that, A slider (7) is slidably disposed on the adjustment groove (6). A limit rod (10) is installed inside the slider (7), and a limit seat (11) is installed at both ends of the limit rod (10). The side wall of the limit seat (11) is welded to the positioning frame (2). The top of the slider (7) is connected to the bracket (8), and a connecting flange (9) is installed on the bracket (8). The connecting flange (9) is connected to the gear torque adjustment system.

4. The torque adjustment device for an electric actuator according to claim 1, characterized in that, The outer wall of the lubricating oil tank (13) is provided with an observation window (15), and the observation window (15) is engraved with scale lines indicating the content. The top of the lubricating oil tank (13) is equipped with a cover plate (14), and the connection between the lubricating oil tank (13) and the sealing sleeve (16) is conical.

5. The torque adjustment device for an electric actuator according to claim 1, characterized in that, A vertical plate (33) is installed on the bracket (8). A pressure rod (34) is installed on the side wall of the vertical plate (33). The pressure rod (34) passes through the end of the sealing sleeve (16). A sealing block (35) is installed at the end of the pressure rod (34). The sealing block (35) is slidably disposed inside the sealing sleeve (16). A through hole (36) is provided on the sealing block (35). When the bracket (8) slides to the lowest point in the adjustment groove (6), the through hole (36) is used to connect the compression sleeve (17) and the lubricating oil tank (13). When the bracket (8) slides to the highest point in the adjustment groove (6), the sealing block (35) and the material discharge position of the sealing sleeve (16) are sealed.

6. The torque adjustment device for an electric actuator according to claim 1, characterized in that, A guide frame (27) is installed on the bottom side wall of the connecting rod (26), and a ball bearing (28) is installed at the end of the guide frame (27). The ball bearing (28) is in contact with the surface of the guide rail (25). The guide rail (25) is arc-shaped. A horizontal plate (29) is movably installed through the side wall of the connecting rod (26), and the horizontal plate (29) is installed on the side wall of the positioning frame (2).

7. The torque adjustment device for an electric actuator according to claim 6, characterized in that, A baffle (30) is installed on the outer wall of the connecting rod (26), and a compression spring (31) is also sleeved on the outer wall of the connecting rod (26). One end of the compression spring (31) is clamped on the baffle (30), and the top of the compression spring (31) is clamped on the side wall of the horizontal plate (29). The compression spring (31) is used to drive the ball (28) to always fit against the guide rail (25) without external force.

8. The torque adjustment device for an electric actuator according to claim 1, characterized in that, A connecting frame (32) is installed on the top of the connecting rod (26). The connecting frame (32) is arched and the end of the connecting frame (32) corresponds to the surface of the injection tube (18).

9. The torque adjustment device for an electric actuator according to claim 5, characterized in that, A rod (21) is installed through the interior of the vertical plate (33). A support frame (20) is installed at one end of the rod (21), and the support frame (20) is movably connected to the end of the compression sleeve (17). The end of the support frame (20) is connected to the end of the piston (19). A push rod (22) is installed at the other end of the rod (21), and the push rod (22) is movably connected to the side wall of the positioning frame (2). A fixed seat (23) is installed on the positioning frame (2), and the fixed seat (23) is movably connected to the rod (21). A return spring (24) is sleeved on the outer wall of the rod (21). One end of the return spring (24) is engaged with the side wall of the push rod (22), and the other end of the return spring (24) is engaged with the fixed seat (23).

10. The torque adjustment device for an electric actuator according to claim 9, characterized in that, The vertical plate (33) has a strip groove, the insertion rod (21) is inserted into the strip groove, the insertion rod (21) has a protrusion (37) installed on it, and the diameter of the protrusion (37) is larger than the diameter of the strip groove, and the protrusion (37) limits the movement distance of the insertion rod (21).

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