Servo electric cylinder with buffering protection function

Abstract

The servo electric cylinder with the buffering protection function comprises a cylinder body, sliding grooves are formed in the front side and the rear side of the cylinder body, sliding blocks are connected into the sliding grooves in a sliding mode, moving rods are fixedly connected to the sides, away from the sliding grooves, of the sliding blocks, and connecting springs are movably connected to the surfaces of the moving rods in a sleeved mode. And the bottom end of the sliding block is fixedly connected with a piston rod. The buffer cylinders are additionally arranged on the two sides of the cylinder body, in the process that the movable rod moves outwards, due to the limiting effect of the sliding block, the connecting spring is squeezed and contracted, and meanwhile the sliding block drives the piston rod and the sliding piston to move in the buffer cylinders; pressure generated by the sliding piston enables an oil body above the sliding piston to flow to the position below the sliding piston through the piston valve, movement of the moving rod is buffered in the flowing process, high-pressure gas is arranged between the floating piston and the buffering cylinder, a certain buffering effect can be achieved by changing the volume of the gas, and therefore the buffering effect of the servo electric cylinder is improved.

Description

Technical Field

[0001] This utility model relates to the field of servo electric cylinder technology, specifically a servo electric cylinder with buffer protection function. Background Technology

[0002] Servo electric cylinders are modular products that integrate servo motors and lead screws, converting the rotary motion of the servo motor into linear motion. Because servo electric cylinders use closed-loop servo control, they have high control precision, low cost, and flexible configuration, making them the best alternative to hydraulic cylinders and pneumatic cylinders. They are widely used in military, entertainment facilities, automobile manufacturing and other industries.

[0003] According to CN211557060U, a servo electric cylinder with buffer protection function is provided. By cooperating with a first buffer column and a second buffer column, when the moving rod extends out of the cylinder body, the moving plate contacts the object but does not cause damage to the object. When the moving rod retracts into the cylinder body, the moving plate will not collide with the sealed cylinder cover. By providing a first spring and a second spring, the servo electric cylinder has a buffer function, which reduces the impact of impact load on the performance and accuracy of the servo electric cylinder and increases the service life of the servo electric cylinder. The bearing is fixedly connected inside the mounting cover plate, and the inside of the bearing is movably connected to the surface of the lead screw.

[0004] By setting a first spring and a second spring inside the cylinder, the servo electric cylinder can have a buffering function. However, the spring has a certain elastic limit, and the frequent operation of the electric cylinder can easily cause the stiffness of the spring to decrease over time, thereby reducing the buffering capacity of the electric cylinder. Utility Model Content

[0005] The purpose of this invention is to provide a servo electric cylinder with a buffer protection function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a servo electric cylinder with buffer protection function, comprising a cylinder body, with grooves on the front and rear sides of the cylinder body, a slider slidably connected inside the grooves, a moving rod fixedly connected to the side of the slider away from the grooves, a connecting spring movably sleeved on the surface of the moving rod, a piston rod fixedly connected to the bottom end of the slider, a buffer cylinder provided on the surface of the piston rod, a sliding piston fixedly sleeved at the bottom of the piston rod, a compression pad slidably connected to the surface of the piston rod, a rebound pad slidably connected to the surface of the piston rod, a floating piston slidably connected inside the buffer cylinder, and a protective shell fixedly connected to the front and rear sides of the cylinder body.

[0007] As a further preferred embodiment of this technical solution, the moving rod passes through the cylinder and extends to its exterior, the connecting spring is located between the slider and the cylinder, the buffer cylinder is fixedly connected to the cylinder, a spring is provided between the sliding piston and the compression pad and the rebound pad, and the protective shell is located outside the buffer cylinder.

[0008] As a further preferred embodiment of this technical solution, a mounting cover plate is fixedly connected to the bottom end of the cylinder body, a reducer is fixedly connected to the top end of the mounting cover plate, a servo motor is fixedly connected to the top end of the reducer, and a first bevel gear is fixedly connected to the output end of the reducer.

[0009] As a further preferred embodiment of this technical solution, a mounting base is fixedly connected to the bottom end of the mounting cover plate, a rotating rod is rotatably connected to the middle of the mounting base, a second bevel gear is fixedly sleeved on the surface of the rotating rod, a third bevel gear is fixedly sleeved on the surface of the rotating rod, a fourth bevel gear meshes with the top end of the third bevel gear, and a lead screw is fixedly connected to the top end of the fourth bevel gear.

[0010] As a further preferred embodiment of this technical solution, the second bevel gear meshes with the first bevel gear, the lead screw passes through the mounting cover plate and is threadedly connected to the moving rod, and the surface of the lead screw is provided with a bearing.

[0011] As a further preferred embodiment of this technical solution, an oil storage tank is fixedly connected to the back of the mounting base, and oil pumps are fixedly connected to the left and right sides of the oil storage tank. A conduit is fixedly connected to the bottom of the oil pump, and a connecting pipe is fixedly connected to the side of the oil pump away from the oil storage tank. An oil outlet plate is fixedly connected to the side of the connecting pipe away from the oil pump.

[0012] As a further preferred embodiment of this technical solution, the oil tank is filled with lubricating oil, the conduit is fixedly connected to the oil tank, the oil outlet plate is located inside the mounting base, and multiple atomizing nozzles are provided on the side of the oil outlet plate away from the oil tank.

[0013] This utility model provides a servo electric cylinder with buffer protection function, which has the following beneficial effects:

[0014] (1) By adding buffer cylinders on both sides of the cylinder body, the connecting spring is compressed and contracted due to the limiting effect of the slider during the outward movement of the moving rod. At the same time, the slider drives the piston rod and the sliding piston to move in the buffer cylinder. The pressure generated by the sliding piston causes the oil above it to flow to the bottom of the sliding piston through the piston valve. During the flow, the movement of the moving rod is buffered. High pressure gas is provided between the floating piston and the buffer cylinder. The change in gas volume can play a certain buffering role, thereby improving the buffering effect of the servo electric cylinder.

[0015] (2) This utility model sets an oil storage tank on one side of the mounting base. During the operation of the servo electric cylinder, the oil pump is started, so that the lubricating oil in the oil storage tank enters the connecting pipe through the conduit and is sprayed out through the oil outlet plate, thereby lubricating the components inside the mounting base and ensuring the lubrication of the rotation between each bevel gear. In addition, multiple atomizing nozzles are set on the oil outlet plate to atomize the lubricating oil and make the spraying more uniform. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the mounting base of this utility model;

[0018] Figure 3 This is a schematic diagram of the cylinder body and slide groove structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the moving rod and lead screw structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the buffer cylinder of this utility model.

[0021] In the diagram: 1. Cylinder body; 2. Slide groove; 3. Slider; 4. Moving rod; 5. Connecting spring; 6. Piston rod; 7. Buffer cylinder; 8. Sliding piston; 9. Compression gasket; 10. Rebound gasket; 11. Floating piston; 12. Protective housing; 13. Mounting cover plate; 14. Reducer; 15. Servo motor; 16. First bevel gear; 17. Mounting base; 18. Rotating rod; 19. Second bevel gear; 20. Third bevel gear; 21. Fourth bevel gear; 22. Lead screw; 23. Oil reservoir; 24. Oil pump; 25. Conduit; 26. Connecting pipe; 27. Oil outlet plate. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model provides a technical solution: such as Figure 1 and Figure 5As shown, in this embodiment, a servo electric cylinder with buffer protection function includes a cylinder body 1. Slide grooves 2 are provided on the front and rear sides of the cylinder body 1. A slider 3 is slidably connected inside the slide grooves 2. A moving rod 4 is fixedly connected to the side of the slider 3 away from the slide grooves 2. A connecting spring 5 is movably sleeved on the surface of the moving rod 4. A piston rod 6 is fixedly connected to the bottom end of the slider 3. A buffer cylinder 7 is provided on the surface of the piston rod 6. A sliding piston 8 is fixedly sleeved at the bottom of the piston rod 6. A compression pad 9 is slidably connected to the surface of the piston rod 6. A rebound pad 10 is slidably connected to the surface of the piston rod 6. A floating piston 11 is slidably connected inside the buffer cylinder 7. A protective shell 12 is fixedly connected to the front and rear sides of the cylinder body 1.

[0024] By adding buffer cylinders 7 on both sides of the cylinder body 1, during the outward movement of the moving rod 4, the connecting spring 5 is compressed and contracted due to the limiting effect of the slider 3. At the same time, the slider 3 drives the piston rod 6 and the sliding piston 8 to move inside the buffer cylinder 7. The pressure generated by the sliding piston 8 causes the oil above it to flow through the piston valve to the bottom of the sliding piston 8. During the flow, the movement of the moving rod 4 is buffered. In addition, high-pressure gas is provided between the floating piston 11 and the buffer cylinder 7. The change in gas volume can play a certain buffering role, thereby improving the buffering effect of the servo electric cylinder.

[0025] The moving rod 4 passes through the cylinder 1 and extends to its outside. The connecting spring 5 is located between the slider 3 and the cylinder 1. The buffer cylinder 7 is fixedly connected to the cylinder 1. A spring is provided between the sliding piston 8 and the compression pad 9 and the rebound pad 10. The protective shell 12 is located outside the buffer cylinder 7.

[0026] A mounting cover plate 13 is fixedly connected to the bottom end of the cylinder body 1, a reducer 14 is fixedly connected to the top end of the mounting cover plate 13, a servo motor 15 is fixedly connected to the top end of the reducer 14, and a first bevel gear 16 is fixedly connected to the output end of the reducer 14.

[0027] The bottom end of the mounting cover plate 13 is fixedly connected to the mounting base 17, the middle part of the mounting base 17 is rotatably connected to the rotating rod 18, the surface of the rotating rod 18 is fixedly sleeved with the second bevel gear 19, the surface of the rotating rod 18 is fixedly sleeved with the third bevel gear 20, the top end of the third bevel gear 20 is meshed with the fourth bevel gear 21, and the top end of the fourth bevel gear 21 is fixedly connected to the lead screw 22.

[0028] The second bevel gear 19 meshes with the first bevel gear 16. The lead screw 22 passes through the mounting cover plate 13 and is threadedly connected to the moving rod 4. The surface of the lead screw 22 is provided with a bearing.

[0029] An oil storage tank 23 is fixedly connected to the back of the mounting base 17. An oil pump 24 is fixedly connected to the left and right sides of the oil storage tank 23. A conduit 25 is fixedly connected to the bottom of the oil pump 24. A connecting pipe 26 is fixedly connected to the side of the oil pump 24 away from the oil storage tank 23. An oil outlet plate 27 is fixedly connected to the side of the connecting pipe 26 away from the oil pump 24.

[0030] By setting an oil reservoir 23 on one side of the mounting base 17, the oil pump 24 is started during the operation of the servo electric cylinder, so that the lubricating oil in the oil reservoir 23 enters the connecting pipe 26 through the conduit 25 and is sprayed out through the oil outlet plate 27, thereby lubricating the components inside the mounting base 17, ensuring the lubrication of the rotation between each bevel gear, and multiple atomizing nozzles are set on the oil outlet plate 27 to atomize the lubricating oil and make the spraying more uniform.

[0031] The oil tank 23 is filled with lubricating oil. The conduit 25 is fixedly connected to the oil tank 23. The oil outlet plate 27 is located inside the mounting base 17. Multiple atomizing nozzles are provided on the side of the oil outlet plate 27 away from the oil tank 23.

[0032] This utility model provides a servo electric cylinder with buffer protection function, and its specific working principle is as follows:

[0033] In use, the servo motor 15 is started, causing the first bevel gear 16 to work. The second bevel gear 19 drives the rotating rod 18 to rotate, the third bevel gear 20 rotates accordingly, and the fourth bevel gear 21 drives the lead screw 22 to rotate. The moving rod 4 rotates on its surface and moves inside the slide groove 2 through the slider 3 to limit the movement, causing the moving rod 4 to move linearly. At the same time, the connecting spring 5 is compressed and contracted. The slider 3 drives the piston rod 6 and the sliding piston 8 to move inside the buffer cylinder 7. The pressure generated by the sliding piston 8 causes the oil above it to flow through the piston valve to the bottom of the sliding piston 8. During the flow, the movement of the moving rod 4 is buffered. High-pressure gas is provided between the floating piston 11 and the buffer cylinder 7. The change in gas volume can play a certain buffering role, thereby avoiding collision between the moving rod 4 and the inner wall of the cylinder 1. After the servo electric cylinder has been working for a period of time, the oil pump 24 is started, so that the lubricating oil in the oil tank 23 enters the connecting pipe 26 through the conduit 25 and is sprayed out through the oil outlet plate 27, thereby lubricating the components inside the mounting base 17.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo cylinder with buffer protection function, comprising a cylinder body (1), characterized in that: The front and back of the cylinder (1) is provided with a sliding groove (2), the inside of the sliding groove (2) is slidably connected with a sliding block (3), the side, away from the sliding groove (2), of the sliding block (3) is fixedly connected with a moving rod (4), the surface of the moving rod (4) is movably sleeved with a connecting spring (5), the bottom end of the sliding block (3) is fixedly connected with a piston rod (6), the surface of the piston rod (6) is provided with a buffer cylinder (7), the bottom of the piston rod (6) is fixedly sleeved with a sliding piston (8), the surface of the piston rod (6) is slidably connected with a compression gasket (9), the surface of the piston rod (6) is slidably connected with a rebound gasket (10), the inside of the buffer cylinder (7) is slidably connected with a floating piston (11), the front and back of the cylinder (1) is fixedly connected with a protective shell (12).

2. The servo cylinder with buffer protection function according to claim 1, characterized in that: The moving rod (4) penetrates through the cylinder (1) and extends to the outside thereof, the connecting spring (5) is located between the sliding block (3) and the cylinder (1), the buffer cylinder (7) is fixedly connected with the cylinder (1), the sliding piston (8) is provided with a spring between the compression gasket (9) and the rebound gasket (10), the protective shell (12) is located outside the buffer cylinder (7).

3. The servo cylinder with buffer protection function according to claim 1, characterized in that: The bottom end of the cylinder (1) is fixedly connected with a mounting cover plate (13), the top end of the mounting cover plate (13) is fixedly connected with a speed reducer (14), the top end of the speed reducer (14) is fixedly connected with a servo motor (15), the output end of the speed reducer (14) is fixedly connected with a first bevel gear (16).

4. The servo cylinder with buffer protection function according to claim 3, characterized in that: The bottom end of the mounting cover plate (13) is fixedly connected with a mounting seat (17), the middle part of the mounting seat (17) is rotatably connected with a rotating rod (18), the surface of the rotating rod (18) is fixedly sleeved with a second bevel gear (19), the surface of the rotating rod (18) is fixedly sleeved with a third bevel gear (20), the top end of the third bevel gear (20) is engaged with a fourth bevel gear (21), the top end of the fourth bevel gear (21) is fixedly connected with a lead screw (22).

5. The servo cylinder with buffer protection function according to claim 4, characterized in that: The second bevel gear (19) is engaged with the first bevel gear (16), the lead screw (22) penetrates through the mounting cover plate (13) and is threadedly connected with the moving rod (4), the surface of the lead screw (22) is provided with a bearing.

6. The servo cylinder with buffer protection function according to claim 4, characterized in that: The back of the mounting seat (17) is fixedly connected with an oil storage tank (23), the left and right sides of the oil storage tank (23) are fixedly connected with an oil pump (24), the bottom end of the oil pump (24) is fixedly connected with a conduit (25), the side, away from the oil storage tank (23), of the oil pump (24) is fixedly connected with a connecting pipe (26), the side, away from the oil pump (24), of the connecting pipe (26) is fixedly connected with an oil outlet plate (27).

7. The servo cylinder with buffer protection function according to claim 6, characterized in that: The inside of the oil storage tank (23) is provided with lubricating oil, the conduit (25) is fixedly connected with the oil storage tank (23), the oil outlet plate (27) is located inside the mounting seat (17), the side, away from the oil storage tank (23), of the oil outlet plate (27) is provided with a plurality of atomizing nozzles.

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