Anti-rotation device for an electric cylinder

Abstract

The utility model belongs to anti -rotation device technical field for electric cylinder, and disclose a kind of anti -rotation device for electric cylinder, comprising: cylinder body, cylinder barrel and piston rod are equipped in the cylinder body, the bottom end of cylinder barrel is equipped with bearing plate, the output end of piston rod is connected with output plate, first support plate is fixedly installed with the outside circumference of cylinder barrel, second support plate is fixedly installed with the outside circumference of piston rod, the sidewall of first support plate and second support plate is evenly distributed with multiple clamping assemblies, multiple guide components are installed between first support plate and second support plate axially, the utility model cooperates when using, multiple clamping plates work, realize the firm connection of first support plate and cylinder barrel, second support plate and piston rod.First support plate and second support plate adopt hollow triangular section design, improve structural strength.Limiting plate is tightly attached to the outer wall of screwing block by spring elastic force, both buffer external impact, and prevent screwing block from autorotation.

Description

Technical Field

[0001] This utility model belongs to the technical field of anti-rotation devices for electric cylinders, and specifically relates to an anti-rotation device for electric cylinders. Background Technology

[0002] An anti-rotation device for electric cylinders is an auxiliary device used to prevent the electric cylinder from rotating during operation. An electric cylinder is an actuator that converts the rotary motion of a motor into linear motion and is widely used in automated equipment. However, in some applications, the piston rod or cylinder barrel of the electric cylinder may rotate due to external loads or asymmetry in the internal structure. To ensure the accuracy and stability of the linear motion of the electric cylinder, an anti-rotation device is typically used to limit this unwanted rotation.

[0003] Application No. 202320457304.5 discloses an anti-rotation device for a servo electric cylinder. The device features an adjustable inner diameter for both the electric cylinder body fastening assembly and the piston rod fastening assembly, adapting to different cylinder sizes. The anti-rotation device can be externally mounted on various electric cylinders. A bushing is provided on the inner side of the connector, and an oil guide groove is provided on the inner side of the bushing to reduce noise and friction during the sliding of the second pin. However, the fastening assembly in this application only uses a unidirectional fixing method, lacking a multi-directional fixing structure and without protective devices. This design makes the fastening assembly prone to loosening or rotation when subjected to external impacts, affecting the stability and reliability of the entire device. Furthermore, the lubrication system relies solely on the oil guide groove for lubrication, failing to provide automatic and continuous lubricant supply and requiring frequent manual replenishment. This not only increases maintenance complexity and workload but also significantly reduces operating efficiency. Under prolonged and high-load operating conditions, this lubrication method cannot guarantee the continuity and stability of the lubrication effect, which may lead to accelerated equipment wear and even affect the normal operation and service life of the equipment. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-rotation device for electric cylinders to solve the problems mentioned in the background art, such as the fastening components being fixed in one direction without protection, easily loosening and rotating; lubrication relying on oil guide grooves, requiring manual replenishment, resulting in low efficiency and affecting the stability and lifespan of the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-rotation device for an electric cylinder, comprising: a cylinder body, wherein a cylinder barrel and a piston rod are disposed inside the cylinder barrel, a bearing plate is installed at the bottom end of the cylinder barrel, an output plate is connected to the output end of the piston rod, a first support plate is fixedly installed circumferentially on the outside of the cylinder barrel, and a second support plate is fixedly installed circumferentially on the outside of the piston rod. Both the first and second support plates adopt a hollow triangular cross-section structure, and multiple clamping components are evenly distributed circumferentially on the side walls of the first and second support plates. Multiple guide components are axially installed between the first and second support plates.

[0006] Preferably, the clamping assembly includes a threaded groove, a threaded rod, and a clamping plate. The threaded groove is formed in a first support plate and a second support plate. The threaded rod is screwed through the threaded groove. The clamping plate is installed at one end of the threaded rod near the cylinder body, and a bearing is connected between the threaded rod and the clamping plate. A turning block is installed at one end of the threaded rod away from the clamping plate, and limiting components are provided on both sides of the turning block.

[0007] The limiting assembly includes a fixing plate, a limiting plate, and a spring. The fixing plate is installed on the outer wall of the first support plate and the second support plate. The fixing plate has an installation groove on its side wall near the screw block. The limiting plate is located in the installation groove. The spring is connected between the installation groove and the limiting plate.

[0008] The clamping plate has a geometric shape of one-third of a circumference arc, and the limiting plate has a geometric shape of one-half a circumference arc;

[0009] The guide assembly includes a sleeve and a rod. The sleeve is fixedly installed on the outer wall of the first support plate, and the rod is fixedly installed on the outer wall of the second support plate, with a portion of the rod located inside the sleeve. A lubrication assembly is provided between the sleeve and the rod.

[0010] Through the above technical solution:

[0011] In use, to prevent the electric cylinder from rotating, the first support plate is first fitted onto the outside of the cylinder barrel, and the second support plate is fitted onto the outside of the piston rod. This step ensures that the two support plates are concentrically positioned with the cylinder barrel and piston rod, laying the foundation for subsequent fixing operations.

[0012] Next, by turning each screwing block, the screwing blocks drive the threaded rod connected to them to rotate. Because of the threaded engagement between the threaded rod and the threaded groove, the rotation of the threaded rod pushes the clamping plate to move along the direction of the threaded groove. As the clamping plate moves, it gradually conforms to the outer wall of the cylinder and the piston rod. Through the coordinated work of multiple clamping plates, reliable fixation is achieved between the first support plate and the cylinder, and between the second support plate and the piston rod.

[0013] Both the first and second support plates adopt a hollow triangular cross-section structure. This triangular structure design provides higher stability and can effectively resist forces and vibrations from different directions, ensuring that the support plates will not deform or loosen during the operation of the electric cylinder.

[0014] On both sides of the screw-in block, there are limiting components, including limiting plates and springs. The limiting plates are held tightly against the outer wall of the screw-in block by the elastic force of the springs. The presence of the limiting plates prevents the screw-in block from being directly impacted by external forces, thus protecting it from damage. The clamping action of the limiting plates on the screw-in block effectively prevents it from rotating under external force, ensuring its positional stability. This ensures that the tight installation between the first support plate and the cylinder, and between the second support plate and the piston rod, will not loosen due to rotation.

[0015] During the operation of the electric cylinder, the piston rod extends and retracts, causing relative movement between the first and second support plates. Simultaneously, the sleeve moves synchronously with the support plates within the sleeve. Multiple guide components work together to ensure that the first and second support plates move only linearly along the cylinder's axial direction, without rotation. This design effectively provides anti-rotation functionality, ensuring the electric cylinder maintains stable linear motion during operation.

[0016] The lubrication assembly includes a storage cylinder, a conduit, and balls. The storage cylinder is installed on the side wall of the sleeve. The conduit is connected to the bottom end of the side wall of the storage cylinder and extends into the sleeve. The balls are assembled in the discharge end of the conduit and are in direct contact with the outer surface of the sleeve rod.

[0017] Preferably, one end of the ball bearing in the conduit is connected to a limiting tube, and the limiting tube adopts a hollow conical structure design. The top of the storage cylinder is provided with an injection hole, and a plug is provided inside the injection hole.

[0018] Through the above technical solution:

[0019] When using this electric cylinder anti-rotation device, first inject an appropriate amount of lubricant into the storage cylinder through the injection port. The storage cylinder, as a lubricant storage container, is designed to ensure stable lubricant storage and allows it to flow naturally into the conduit by gravity when needed. This design simplifies the lubricant replenishment process and ensures a continuous lubricant supply.

[0020] The discharge end of the conduit is equipped with ball bearings. Due to air pressure, the lubricant will not easily flow out of the discharge end within the conduit. This air pressure balance design ensures stable storage of the lubricant within the conduit, and it is only applied to moving parts by the action of the ball bearings when needed.

[0021] When relative movement occurs between the sleeve and the bushing, the balls come into direct contact with the outer surface of the sleeve. This rolling contact of the balls ensures uniform application of lubricant to the sleeve surface. Specifically, the balls carry the lubricant from the conduit during movement and evenly distribute it across the outer surface of the sleeve. This design not only achieves self-lubrication between the sleeve and the bushing but also significantly reduces sliding friction, improving motion efficiency and the system's wear resistance.

[0022] In addition, the limiting tube adopts a hollow conical structure design, which effectively prevents the balls from falling out of the conduit and ensures the continuity and stability of lubricant delivery.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] (1) This utility model ensures the stability and reliability of the entire device during operation by setting clamping plates and limiting plates. In use, multiple clamping plates work together to achieve a stable connection between the first support plate and the cylinder, and between the second support plate and the piston rod. The first and second support plates adopt a hollow triangular cross-section design, which improves the structural strength. The limiting plate is tightly attached to the outer wall of the screwing block by spring force, which not only buffers external impacts but also prevents the screwing block from rotating, ensuring its fixed position. This design prevents the connection from loosening due to the rotation of the screwing block, further ensuring the tight assembly between the support plate and the cylinder and piston rod.

[0025] (2) This utility model achieves self-lubrication between equipment by setting up a storage cylinder, a guide tube, and ball bearings. During use, the lubricant in the storage cylinder flows into the guide tube by its own gravity, and the ball bearings assembled at the outlet end of the guide tube play a dual role of sealing and controlling the release of lubricant. When the sleeve rod and the sleeve move relative to each other, the ball bearings directly roll into contact with the surface of the sleeve rod. Driven by friction, the ball bearings rotate, uniformly coating the lubricant in the guide tube onto the surface of the sleeve rod, thereby achieving a self-lubricating effect. This design effectively reduces sliding friction between components, significantly improves motion efficiency and wear resistance of the system, and reduces equipment maintenance costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the cylinder body of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the first support plate of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the sleeve of this utility model;

[0030] Figure 5This is a schematic diagram of the structure of the sleeve rod of this utility model;

[0031] Figure 6 This is a schematic diagram of the threaded rod of this utility model.

[0032] Figure 7 This is a schematic diagram of the structure of the spring of this utility model;

[0033] Figure 8 This is a schematic diagram of the structure of the ball bearing of this utility model;

[0034] In the diagram: 1. Cylinder body; 2. Cylinder barrel; 3. Piston rod; 4. Bearing plate; 5. Output plate; 6. First support plate; 7. Second support plate; 8. Threaded groove; 9. Threaded rod; 10. Clamping plate; 11. Bearing; 12. Twisting block; 13. Fixing plate; 14. Mounting groove; 15. Limiting plate; 16. Spring; 17. Sleeve; 18. Sleeve rod; 19. Storage cylinder; 20. Guide tube; 21. Ball bearing; 22. Limiting tube. Detailed Implementation

[0035] 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.

[0036] Please see Figures 1-7 As shown, this utility model provides the following technical solution: an anti-rotation device for an electric cylinder, comprising: a cylinder body 1, a cylinder barrel 2 and a piston rod 3 inside the cylinder body 1, a bearing plate 4 installed at the bottom end of the cylinder barrel 2, an output plate 5 connected to the output end of the piston rod 3, a first support plate 6 fixedly installed circumferentially on the outside of the cylinder barrel 2, and a second support plate 7 fixedly installed circumferentially on the outside of the piston rod 3. Both the first support plate 6 and the second support plate 7 adopt a hollow triangular cross-section structure. Multiple clamping components are evenly distributed circumferentially on the side walls of the first support plate 6 and the second support plate 7. Multiple guide components are axially installed between the first support plate 6 and the second support plate 7.

[0037] Furthermore, the clamping assembly includes a threaded groove 8, a threaded rod 9, and a clamping plate 10. The threaded groove 8 is formed in the first support plate 6 and the second support plate 7. The threaded rod 9 is screwed through the threaded groove 8. The clamping plate 10 is installed at the end of the threaded rod 9 near the cylinder body 1, and a bearing 11 is connected between the threaded rod 9 and the clamping plate 10. A screwing block 12 is installed at the end of the threaded rod 9 away from the clamping plate 10. Limiting components are provided on both sides of the screwing block 12.

[0038] The limiting assembly includes a fixing plate 13, a limiting plate 15, and a spring 16. The fixing plate 13 is installed on the outer wall of the first support plate 6 and the second support plate 7. The side wall of the fixing plate 13 near the screw block 12 has an installation groove 14. The limiting plate 15 is located in the installation groove 14. The spring 16 is connected between the installation groove 14 and the limiting plate 15.

[0039] The clamping plate 10 has a geometric shape of one-third of a circle arc, and the limiting plate 15 has a geometric shape of one-half a circle arc;

[0040] The guide assembly includes a sleeve 17 and a rod 18. The sleeve 17 is fixedly installed on the outer wall of the first support plate 6, and the rod 18 is fixedly installed on the outer wall of the second support plate 7. A portion of the rod 18 is located inside the sleeve 17, and a lubrication assembly is provided between the sleeve 17 and the rod 18.

[0041] Through the above technical solution:

[0042] In use, to prevent the electric cylinder from rotating, the first support plate 6 is first fitted onto the outside of the cylinder 2, and the second support plate 7 is fitted onto the outside of the piston rod 3. This step ensures that the two support plates are concentrically positioned with the cylinder 2 and piston rod 3, laying the foundation for subsequent fixing operations.

[0043] Next, by screwing in each screwing block 12, the screwing block 12 drives the threaded rod 9 connected to it to rotate. Since there is a threaded fit between the threaded rod 9 and the threaded groove 8, the rotation of the threaded rod 9 pushes the clamping plate 10 to move along the direction of the threaded groove 8. As the clamping plate 10 moves, it gradually conforms to the outer wall of the cylinder 2 and the piston rod 3. Through the coordinated work of multiple clamping plates 10, reliable fixing is achieved between the first support plate 6 and the cylinder 2, and between the second support plate 7 and the piston rod 3.

[0044] Both the first support plate 6 and the second support plate 7 adopt a hollow triangular cross-section structure. This triangular structure design provides higher stability and can effectively resist forces and vibrations from different directions, ensuring that the support plate will not deform or loosen during the operation of the electric cylinder.

[0045] On both sides of the rotating block 12, there are limiting components, including a limiting plate 15 and a spring 16. The limiting plate 15 is tightly attached to the outer wall of the rotating block 12 by the elastic force of the spring 16. The presence of the limiting plate 15 prevents the rotating block 12 from being directly impacted by the outside, thereby protecting the rotating block 12 from damage. The clamping action of the limiting plate 15 on the rotating block 12 can effectively prevent the rotating block 12 from rotating under external force, ensuring its positional stability, thereby ensuring that the tight installation between the first support plate 6 and the cylinder 2, and between the second support plate 7 and the piston rod 3, will not loosen due to rotation.

[0046] During the operation of the electric cylinder, the piston rod 3 extends and retracts, causing relative movement between the first support plate 6 and the second support plate 7. At this time, the sleeve rod 18 moves synchronously with the support plates within the sleeve 17. Multiple guide components work together to ensure that the first support plate 6 and the second support plate 7 only undergo linear motion along the axial direction of the cylinder body 1, without rotation. This design effectively provides anti-rotation functionality, ensuring that the electric cylinder maintains stable linear motion during operation.

[0047] Please see Figure 1 , Figure 4 , Figure 5 and Figure 8 As shown, the lubrication assembly includes a storage cylinder 19, a conduit 20, and a ball bearing 21. The storage cylinder 19 is installed on the side wall of the sleeve 17. The conduit 20 is connected to the bottom end of the side wall of the storage cylinder 19 and extends into the sleeve 17. The ball bearing 21 is assembled in the discharge end of the conduit 20 and is in direct contact with the outer surface of the sleeve rod 18.

[0048] Furthermore, the ball bearing 21 mounted on the conduit 20 is connected at one end to the limiting tube 22, and the limiting tube 22 adopts a hollow conical structure design. The top of the storage cylinder 19 is provided with an injection hole, and a plug is provided inside the injection hole.

[0049] Through the above technical solution:

[0050] When using the anti-rotation device for the electric cylinder, firstly, an appropriate amount of lubricant is pre-injected into the storage cylinder 19 through the injection port. The storage cylinder 19, as a lubricant storage container, is designed to ensure stable storage of the lubricant, which then flows naturally into the conduit 20 by gravity when needed. This design simplifies the lubricant replenishment process and ensures a continuous supply of lubricant.

[0051] The discharge end of the conduit 20 is equipped with ball bearings 21. Due to air pressure, the lubricant will not easily flow out of the discharge end within the conduit 20. This air pressure balance design ensures stable storage of the lubricant within the conduit 20, and it is only applied to the moving parts by the action of the ball bearings 21 when needed.

[0052] When relative movement occurs between the sleeve rod 18 and the sleeve 17, the balls 21 come into direct contact with the outer surface of the sleeve rod 18. Through the rolling contact of the balls 21, lubricant is evenly applied to the surface of the sleeve rod 18. Specifically, during movement, the balls 21 carry the lubricant from the conduit 20 and evenly coat it onto the outer surface of the sleeve rod 18. This design not only achieves self-lubrication between the sleeve 17 and the sleeve rod 18 but also significantly reduces sliding friction, improving motion efficiency and the system's wear resistance.

[0053] Furthermore, the limiting tube 22 adopts a hollow conical structure design, effectively preventing the ball bearing 21 from detaching from the conduit 20, ensuring the continuity and stability of lubricant delivery. Inside the conduit 20, a spring-loaded structure is installed. This spring not only provides the necessary movement space for the ball bearing 21, preventing it from retracting into the conduit 20 and ensuring its free rolling within the conduit 20, but also effectively guarantees the contact between the ball bearing 21 and the sleeve rod 18 through the elasticity of the spring, thereby achieving more efficient lubrication transmission. In addition, the surface of the ball bearing 21 is specially designed with raised structures. These raised structures can absorb more lubricant and spread it more evenly on the outer surface of the sleeve rod 18 as the ball bearing 21 rolls. To further improve the lubrication effect, an annular sponge structure can also be set inside the sleeve 17. This annular sponge can effectively absorb lubricant and gradually release it as the sleeve rod 18 moves, distributing it more evenly on the outer surface of the sleeve rod 18, ensuring continuous and uniform lubrication.

[0054] 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. An anti-rotation device for an electric cylinder, characterized in that, include: A cylinder body (1) is provided inside the cylinder body (1), a cylinder barrel (2) and a piston rod (3). A bearing plate (4) is installed at the bottom end of the cylinder barrel (2). An output plate (5) is connected to the output end of the piston rod (3). A first support plate (6) is fixedly installed on the outer circumference of the cylinder barrel (2). A second support plate (7) is fixedly installed on the outer circumference of the piston rod (3). Both the first support plate (6) and the second support plate (7) adopt a hollow triangular cross-section structure. Multiple clamping components are evenly distributed on the side walls of the first support plate (6) and the second support plate (7). Multiple guide components are axially installed between the first support plate (6) and the second support plate (7).

2. The anti-rotation device for an electric cylinder according to claim 1, characterized in that: The clamping assembly includes a threaded groove (8), a threaded rod (9), and a clamping plate (10). The threaded groove (8) is formed in the first support plate (6) and the second support plate (7). The threaded rod (9) is screwed through the threaded groove (8). The clamping plate (10) is installed at the end of the threaded rod (9) near the cylinder (1). A bearing (11) is connected between the threaded rod (9) and the clamping plate (10). A screwing block (12) is installed at the end of the threaded rod (9) away from the clamping plate (10). Limiting components are provided on both sides of the screwing block (12).

3. The anti-rotation device for an electric cylinder according to claim 2, characterized in that: The limiting assembly includes a fixing plate (13), a limiting plate (15), and a spring (16). The fixing plate (13) is installed on the outer wall of the first support plate (6) and the second support plate (7). The fixing plate (13) has an installation groove (14) on its side wall near the screw block (12). The limiting plate (15) is located in the installation groove (14). The spring (16) is connected between the installation groove (14) and the limiting plate (15).

4. The anti-rotation device for an electric cylinder according to claim 3, characterized in that: The clamping plate (10) has a geometric shape of one-third of a circle arc, and the limiting plate (15) has a geometric shape of one-half a circle arc.

5. The anti-rotation device for an electric cylinder according to claim 1, characterized in that: The guide assembly includes a sleeve (17) and a rod (18). The sleeve (17) is fixedly installed on the outer wall of the first support plate (6), and the rod (18) is fixedly installed on the outer wall of the second support plate (7). A portion of the rod (18) is located inside the sleeve (17). A lubrication assembly is provided between the sleeve (17) and the rod (18).

6. The anti-rotation device for an electric cylinder according to claim 5, characterized in that: The lubrication assembly includes a storage cylinder (19), a conduit (20), and a ball bearing (21). The storage cylinder (19) is installed on the side wall of the sleeve (17). The conduit (20) is connected to the bottom end of the side wall of the storage cylinder (19) and extends into the sleeve (17). The ball bearing (21) is assembled in the discharge end of the conduit (20) and is in direct contact with the outer surface of the sleeve rod (18).

7. The anti-rotation device for an electric cylinder according to claim 6, characterized in that: The ball bearing (21) assembled in the conduit (20) is connected to a limiting tube (22) at one end, and the limiting tube (22) adopts a hollow conical structure design. The top of the storage cylinder (19) is provided with an injection hole.

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