Servo electric cylinder

Abstract

The utility model relates to the technical field of servo electric cylinders, and discloses a servo electric cylinder which comprises a cylinder barrel, a front end cover is arranged at the left end of the cylinder barrel, a rear end cover is arranged at the right end of the cylinder barrel, a ball screw is rotationally connected to the interior of the cylinder barrel, a lead screw nut is in threaded connection with the exterior of the ball screw, and the lead screw nut is connected with the right end of a telescopic rod piston. The left end of the telescopic rod piston is connected with a telescopic rod, a servo motor is arranged outside the cylinder barrel, and an output shaft of the servo motor is connected with a ball screw in a belt transmission mode. According to the servo electric cylinder, the ball screw and the telescopic rod piston are driven by the servo motor to move, the performance of the electric cylinder is improved, and the servo electric cylinder has the advantages of being small in installation space, low in noise, convenient to operate, easy to maintain, stable in performance, diversified in configuration and large in thrust.

Description

Technical Field

[0001] This utility model relates to the field of servo electric cylinder technology, specifically a servo electric cylinder. 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. They are widely used in industries such as civil explosives, military, and food.

[0003] The existing electric cylinders use a direct-drive design, where the reducer, servo motor, and cylinder body are all located at the same center. While this structure is simple, it significantly increases the product's length, making it unsuitable for installations with limited space and resulting in higher noise levels. Therefore, improvements are needed. Utility Model Content

[0004] This invention provides a servo electric cylinder that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A servo electric cylinder includes a cylinder barrel, a front end cover at the left end of the cylinder barrel, and a rear end cover at the right end of the cylinder barrel. A ball screw is rotatably connected inside the cylinder barrel, and a screw nut is threaded onto the outside of the ball screw. The screw nut is connected to the right end of a telescopic rod piston, and the left end of the telescopic rod piston is connected to a telescopic rod. A servo motor is disposed outside the cylinder barrel, and the output shaft of the servo motor is connected to the ball screw via a belt drive.

[0007] As a preferred technical solution of this utility model, a reducer mounting plate is provided on the right side of the rear end cover, and a reducer is provided on the reducer mounting plate. The output shaft of the reducer and the end of the ball screw are both provided with synchronous pulleys. The two synchronous pulleys are connected by a synchronous belt. The input shaft of the reducer is connected to the output shaft of the servo motor.

[0008] As a preferred embodiment of this utility model, a front support leg is provided at the lower part of the front cover, a piston head is provided on the left side of the front cover, and a rear support leg is provided at the lower part of the rear cover.

[0009] As a preferred embodiment of this utility model, the side wall of the cylinder is provided with a 90° grease nipple, the top of the cylinder is provided with an oil filling hole, and the side wall of the rear end cover is provided with a grease nipple.

[0010] As a preferred embodiment of this utility model, the left end of the ball screw is provided with a screw stop, the outer side of the telescopic rod is provided with a copper sleeve, and the telescopic rod is provided with a wear-resistant guide block and a guide key.

[0011] As a preferred embodiment of this utility model, the telescopic rod piston is provided with an annular magnetic ring and a polytetrafluoroethylene guide strip on its exterior.

[0012] As a preferred embodiment of this utility model, a static blocking ring is provided inside the rear end cover, an angular contact bearing is sleeved on the outside of the ball screw, and a dustproof sealing ring is provided on the side of the angular contact bearing.

[0013] As a preferred embodiment of this invention, a magnetic switch is provided on the piston head.

[0014] The present invention has the following advantages:

[0015] This utility model applies to a servo electric cylinder, which uses a servo motor to drive the movement of a ball screw and a telescopic rod piston, thereby improving the performance of the electric cylinder. It features small installation space, low noise, convenient operation, simple maintenance, stable performance, diverse configurations, and large thrust. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of a servo electric cylinder.

[0018] Figure 2 This is a left view of a servo electric cylinder.

[0019] Figure 3 This is a half-sectional view of a servo electric cylinder.

[0020] In the diagram: 1. Front support leg; 2. Piston head; 3. Front end cover; 4. Cylinder; 5. 90° grease nipple; 6. Oil filling hole; 7. Servo motor; 8. Reducer; 9. Reducer mounting plate; 10. Synchronous pulley cover; 11. Grease nipple; 12. Rear end cover; 13. Rear support leg; 14. Magnetic switch; 15. Wear-resistant guide block; 16. Guide key; 17. Screw stop block; 18. Copper sleeve; 19. Telescopic rod; 20. Ball screw; 21. Telescopic rod piston; 22. Annular magnetic ring; 23. PTFE guide strip; 24. Static stop ring; 25. Angular contact bearing; 26. Dustproof seal ring; 27. Synchronous pulley; 28. Round nut; 29. ​​Synchronous belt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In one embodiment, see Figures 1-3 A servo electric cylinder includes a cylinder barrel 4. A front end cover 3 is located at the left end of the cylinder barrel 4, and a rear end cover 12 is located at the right end of the cylinder barrel 4. O-rings are provided at the connection points between the front end cover 3, the rear end cover 12, and the cylinder barrel 4 to prevent leakage of lubricating oil inside the cylinder barrel 4. A ball screw 20 is rotatably connected inside the cylinder barrel 4. A screw nut is threaded onto the outside of the ball screw 20. The screw nut is connected to the right end of a telescopic rod piston 21, and the left end of the telescopic rod piston 21 is connected to a telescopic rod 19. A servo motor 7 is located outside the cylinder barrel 4, and the output shaft of the servo motor 7 is connected to the ball screw 20 via belt drive. A screw stop is installed at the other end of the ball screw 20. The telescopic rod piston 21 is concentric with the ball screw 20, with one end connected to the screw nut and the other end connected to the telescopic rod piston 21.

[0023] In one embodiment, a reducer mounting plate 9 is provided on the right side of the rear end cover 12. A reducer 8 is mounted on the reducer mounting plate 9. Synchronous pulleys 27 are provided at the ends of the output shaft of the reducer 8 and the ball screw 20. Round nuts 28 are provided at the ends of the synchronous pulleys 27. The two synchronous pulleys 27 are connected by a synchronous belt 29. The input shaft of the reducer 8 is connected to the output shaft of the servo motor 7. One end of the reducer 8 is connected to the servo motor 7, and the other end of the reducer 8 passes through the central shaft of the upper synchronous pulley 27. One end of the ball screw 20 passes through the lower synchronous pulley 27 and the angular contact bearing 25, and is coaxial with the cylinder 4. One end of the ball screw 20, passing through the angular contact bearing 25 and the lower synchronous pulley 27, is locked with a round nut 28. A screw stop is installed at the other end to prevent the steel balls inside the screw nut from falling out. The reducer 8 and the ball screw 20 are connected by two synchronous pulleys 27 and a synchronous belt 29. The servo motor 7 can adjust its production capacity by adjusting its speed. To improve the protective effect, a synchronous pulley cover 10 is provided on the outside of the synchronous pulley 27.

[0024] In one embodiment, a front support leg 1 is provided at the lower part of the front end cover 3, a piston head 2 is provided on the left side of the front end cover 3, and a rear support leg 13 is provided at the lower part of the rear end cover 12. The front support leg 1 and the rear support leg 13 are used to support the cylinder body. The mounting holes of the front support leg 1 and the rear support leg 13 are both elongated slotted holes, which facilitates the installation and position adjustment of the electric cylinder. The piston head 2 installed at the extended end of the telescopic rod 19 is an external threaded connector, which facilitates the installation of pistons of different sizes.

[0025] In one embodiment, the cylinder 4 has a 90° grease nipple 5 on its side wall, an oil filling hole 6 on its top, and a grease nipple 11 on the side wall of the rear end cover 12. The 90° grease nipple 5 is installed on the mounting screw hole of the guide key 16 to lubricate the telescopic rod 19 assembly. The oil filling hole 6 on the cylinder 4 facilitates lubrication of the lead screw nut, making the lead screw ball rotate more smoothly, reducing friction, extending the stable operating life of the ball screw 20, and reducing equipment maintenance costs. The 90° grease nipple 5 on the cylinder 4 is used to lubricate the guide groove inside the wear-resistant guide block 15, extending the service life of the wear-resistant guide block 15 and the guide key 16, resulting in lower operating noise and greater durability of the electric cylinder. The grease nipple 11 on the side of the rear end cover 12 is used to lubricate the angular contact bearing 25, reducing bearing rotation friction and noise.

[0026] In one embodiment, a copper sleeve 18 is provided on the outer side of the telescopic rod 19, and a wear-resistant guide block 15 and a guide key 16 are provided on the telescopic rod 19. The copper sleeve 18 is installed inside the front end cover 3, and the telescopic rod 19 is slidably connected to the copper sleeve 18.

[0027] In one embodiment, the telescopic piston 21 is externally provided with an annular magnetic ring 22 and a polytetrafluoroethylene (PTFE) guide strip 23. The telescopic piston 21 has two PTFE guide strips 23, which are slidably connected relative to the cylinder 4. The telescopic piston 21 has an annular magnetic ring 22 for sensing by the magnetic switch 14.

[0028] In one embodiment, a static stop ring 24 is provided inside the rear end cover 12, and an angular contact bearing 25 is sleeved on the outside of the ball screw 20. A dustproof seal ring 26 is provided on the side of the angular contact bearing 25. The front end cover 3 and the rear end cover 12 are equipped with PTFE static stop rings 24. When the electric cylinder program malfunctions, direct metal-to-metal collisions can be avoided, the impact force can be reduced, and the degree of damage to other components can be decreased. A dustproof seal ring 26 is provided at one end of the angular contact bearing 25 to prevent the leakage of lubricating oil inside the cylinder 4.

[0029] In one embodiment, the piston head 2 is equipped with magnetic switches 14, which are used to detect the initial position, extension limit position, and retraction limit position. There are a total of five magnetic switches 14. One magnetic switch 14 is used for the initial position, serving as the starting position for each start-up. Two magnetic switches 14 are used for the extension and retraction limit positions. Once the limit positions are detected by the magnetic switches 14, the movement of the electric cylinder is programmed to be limited.

[0030] In this embodiment, after the operator confirms the speed on the operation screen, the electric cylinder working program is started. The servo motor 7 drives the ball screw 20 inside the electric cylinder to rotate through the transmission of the high-precision planetary reducer 8, synchronous pulley 27, and synchronous belt 29. The ball screw 20 converts the forward and reverse rotation motion of the servo motor 7 into the reciprocating linear motion of the piston, thereby realizing precise control of the reciprocating motion of the piston.

[0031] This utility model applies to a servo electric cylinder, which uses a servo motor 7 to drive the movement of a ball screw 20 and a telescopic piston 21, thereby improving the performance of the electric cylinder. It features small installation space, low noise, convenient operation, simple maintenance, stable performance, diverse configurations, and large thrust.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A servo electric cylinder, characterized in that, The device includes a cylinder, a front end cap at the left end of the cylinder, and a rear end cap at the right end of the cylinder. A ball screw is rotatably connected inside the cylinder, and a screw nut is threaded onto the outside of the ball screw. The screw nut is connected to the right end of a telescopic rod piston, and the left end of the telescopic rod piston is connected to a telescopic rod. A servo motor is installed outside the cylinder, and the output shaft of the servo motor is connected to the ball screw via a belt drive.

2. A servo electric cylinder according to claim 1, characterized in that, A speed reducer mounting plate is provided on the right side of the rear end cover. A speed reducer is mounted on the speed reducer mounting plate. Synchronous pulleys are provided at the ends of the output shaft and ball screw of the speed reducer. The two synchronous pulleys are connected by a synchronous belt. The input shaft of the speed reducer is connected to the output shaft of the servo motor.

3. A servo electric cylinder according to claim 1, characterized in that, The lower part of the front cover is provided with a front support leg, the left side of the front cover is provided with a piston head, and the lower part of the rear cover is provided with a rear support leg.

4. A servo electric cylinder according to claim 1, characterized in that, The cylinder barrel has a 90° grease nipple on its side wall, an oil filling hole on its top, and a grease nipple on the side wall of its rear end cover.

5. A servo electric cylinder according to claim 1, characterized in that, The ball screw is provided with a screw stop at its left end, a copper sleeve is provided on the outside of the telescopic rod, and a wear-resistant guide block and a guide key are provided on the telescopic rod.

6. A servo electric cylinder according to claim 1, characterized in that, The telescopic rod piston is externally provided with an annular magnetic ring and a polytetrafluoroethylene guide strip.

7. A servo electric cylinder according to claim 1, characterized in that, The rear end cover is provided with a static blocking ring inside, and the ball screw is fitted with an angular contact bearing on the outside, with a dustproof sealing ring on the side of the angular contact bearing.

8. A servo electric cylinder according to claim 3, characterized in that, A magnetic switch is provided on the piston head.

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