Inner anti-rotation mechanism of electric cylinder with rectangular cylinder body

Abstract

The invention discloses an inner anti-rotation mechanism of an electric cylinder with a rectangular cylinder body, and relates to the technical field of rectangular electric cylinders, the inner anti-rotation mechanism comprises an electric cylinder shell, a protective cover is arranged on the outer wall of the electric cylinder shell, a servo motor is fixedly connected to the outer wall of the protective cover, and the output end of the servo motor is fixedly connected with a rotating shaft; a transmission belt is arranged on the outer wall of the rotating shaft, the rotating center of the rotating shaft is fixedly connected with a screw located in the electric cylinder shell, the outer wall of the screw is sleeved with a connecting bearing, the outer wall of the screw is in threaded connection with a threaded sliding block, and the outer wall of the threaded sliding block is fixedly connected with a telescopic rod connected to the outer wall of the screw in a sleeving mode. By means of the structure, when the rotating shaft and the transmission belt drive the screw to continuously rotate, the rotating shaft is clamped and locked in time after being stopped, and the effect of preventing the belt from deviating left and right is achieved under the condition that the rotating shaft continuously rotates.

Description

Technical Field

[0001] The invention belongs to the technical field of rectangular electric cylinders, and particularly relates to an anti-rotation mechanism inside a rectangular cylinder electric cylinder. Background Art

[0002] The reliability and service life of the anti-rotation mechanism of an electric cylinder are important indicators for evaluating the reliability and service life of the electric cylinder. The internal anti-rotation mechanism has the advantages of being structurally compact, small in volume, and good in sealing conditions, and has been widely used in electric cylinders. However, the existing internal anti-rotation mechanisms are all based on screw drive, and achieve the anti-rotation effect by adding other relatively independent devices. The structure is large in volume, and the assembly and setting are relatively cumbersome. At the same time, when the driving rod of the electric cylinder makes a telescopic movement, the anti-rotation mechanism and the driving rod mainly rely on the sliding friction contact between the anti-rotation mechanism and the cylinder body to achieve anti-rotation. The long-term work leads to the wear of the anti-rotation mechanism, which will not only cause the failure of the anti-rotation mechanism, but also reduce the movement accuracy of the electric cylinder, increase the load, and at the same time, keys or grooves need to be machined inside the cylinder body, increasing the difficulty of processing. It is difficult to guarantee the working accuracy when using customized profiles.

[0003] In the prior art, although the rectangular electric cylinder can be used for better anti-rotation, when the electric cylinder is subjected to anti-rotation treatment, an anti-rotation mechanism is often added at the position of the threaded slider. The threaded slider is driven by a synchronous belt to drive the screw to drive the threaded slider to slide. The synchronous belt is at the driving source of the electric cylinder. When the driving shaft of the synchronous belt stops, the effect of timely clamping and fixing the driving shaft is not high. When the driving shaft rotates, the screw will rotate. The anti-rotation mechanism provided at the threaded slider will still affect the use effect of the anti-rotation mechanism provided at the threaded slider under the rotation of the screw. At the same time, when the driving shaft is timely clamped and fixed, the effect of preventing the deviation of the left and right sides of the transmission belt is not high under the continuous rotation of the transmission belt. When the transmission belt rotates continuously, the transmission belt will slide left and right due to friction, affecting the telescopic use accuracy of the electric cylinder, which is not conducive to the use of the staff. Therefore, we propose an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. Summary of the Invention

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: An internal anti-rotation mechanism for a rectangular cylinder electric cylinder, including an electric cylinder housing, a protective cover is provided on the outer wall of the electric cylinder housing, a rotating shaft is rotatably connected to the inner wall of the protective cover, a transmission belt is provided on the outer wall of the rotating shaft, a screw is fixedly connected to the rotation center of the rotating shaft and is located inside the electric cylinder housing, a threaded slider is threadedly connected to the outer wall of the screw, a telescopic rod is fixedly connected to the outer wall of the threaded slider, an installation cover plate is detachably connected to the outer wall of the protective cover, a first clamping component is provided on the outer wall of the installation cover plate, and a second clamping component is provided on one side of the transmission belt; The first engaging component includes a clamping rod. A connecting block is fixedly connected to the outer wall of the mounting cover plate. A connecting gear is rotatably connected to the outer wall of the connecting block. The clamping rod is engaged with the outer wall of the connecting gear. A sliding rod fixedly connected to the outer wall of the clamping rod is slidably connected to the outer wall of the connecting block; The second engaging component includes a positioning block. A swinging rod is rotatably connected to the inner wall of the mounting cover plate. The positioning block is slidably connected to the outer wall of the swinging rod and is located on one side of the transmission belt. A pressing rod fixedly connected to the outer wall of the positioning block is fixedly connected to the outer wall of the mounting cover plate.

[0005] In this technical solution, after the mounting cover plate is installed on the protective cover, the mounting block and the rotating shaft are clamped and fixed. When the rotating shaft rotates, the connecting gear will be driven to rotate synchronously. At the same time, the pressing movement of the connecting gear on the clamping rod drives the sliding rod and the connecting rod to perform reciprocating telescopic movements. When the rotating shaft stops rotating, the clamping rod will timely engage and fix the connecting gear to prevent the rotating shaft from performing a reverse rotation movement, initially reducing the situation where the belt rotates in reverse when the electric cylinder stops being used; While the sliding rod and the connecting rod slide reciprocally, the connecting rod slides along the inner wall of the first limiting groove, driving the swinging rod to continuously rotate. The rotation of the swinging rod drives the positioning block to slide along the inner wall of the second limiting groove and performs a reciprocating pressing movement on the pressing rod, causing the positioning block to perform a reciprocating centering slide. Under the reciprocating centering movement of the positioning block, effective limiting movements are performed on both sides of the transmission belt, preventing the transmission belt from slipping left and right during continuous rotation, further improving the telescopic accuracy of the telescopic rod when the electric cylinder drives, and further improving the effect of preventing the reverse rotation of the telescopic rod.

[0006] Preferably, the outer wall contour of the pressing part of the clamping rod and the connecting gear is beveled. A connecting bearing is sleeved on the outer wall of the screw rod. A second spring fixedly connected to the outer wall of the positioning block is sleeved on the outer wall of the pressing rod. A first spring fixedly connected to the outer wall of the connecting block is sleeved on the outer wall of the sliding rod. One end of the first spring is fixedly connected to a connecting rod fixedly connected to one end of the sliding rod. A servo motor fixedly connected to the rotation center of the rotating shaft is fixedly connected to the outer wall of the protective cover.

[0007] In this technical solution, through the setting that the outer wall contour of the pressing part of the clamping rod and the connecting gear is beveled, it plays a role in timely engaging and fixing to prevent reverse rotation when the rotating shaft does not rotate.

[0008] Preferably, a first limiting groove is formed at the connecting part of the outer wall of the swinging rod and the connecting rod. A second limiting groove is formed at the connecting part of the outer wall of the swinging rod and the positioning block. The positions of the first limiting groove and the second limiting groove are equidistantly distributed about the rotation center of the swinging rod. The clamping rod and the connecting rod are symmetrically distributed about the rotation center of the connecting gear. The swinging rod and the connecting rod are slidably connected.

[0009] In this technical solution, by providing the first limiting groove and the second limiting groove, it plays a role in driving the clamping rod and the positioning block to be alternately engaged.

[0010] Preferably, the other end of the second spring is fixedly connected to the outer wall of the mounting cover plate. The outer wall profile of the positioning block is U-shaped, and the positioning blocks are symmetrically arranged on both sides of the transmission belt. Moreover, the distance between the outer walls of the transmission belt is adapted to the distance between the inner walls of the positioning blocks.

[0011] In this technical solution, by setting the outer wall profile of the positioning block to be U-shaped, it plays a role in effectively limiting and fixing both sides of the transmission belt.

[0012] Preferably, a mounting block that is fixedly connected to the rotation center of the connecting gear and is engaged with the outer wall of the rotating shaft is provided. A slot is provided at the connection part between the inner wall of the mounting block and the rotating shaft. An engaging block is fixedly connected to the outer wall of the mounting block. A jacking rod is slidably connected to the outer wall of the engaging block. A third spring that is fixedly connected to the outer wall of the engaging block is sleeved on the outer wall of the jacking rod. One end of the third spring is fixedly connected to a pulling block that is fixedly connected to one end of the jacking rod. A clamping block is fixedly connected to one end of the jacking rod. A clamping column that is engaged with the outer wall of the clamping block is fixedly connected to the outer wall of the rotating shaft.

[0013] In this technical solution, by providing the clamping column, it plays a role in enhancing the engagement between the rotating shaft and the connecting gear.

[0014] Preferably, both the engaging block and the clamping block are provided in two groups. The positions of the two groups of engaging blocks and clamping blocks are symmetric with respect to the central axis of the rotating shaft, and the clamping block is arranged on the movement track of the engaging block.

[0015] In this technical solution, by arranging the clamping block on the movement track of the engaging block, it plays a role in driving the synchronous rotation between the connecting gear and the rotating shaft.

[0016] Preferably, the outer wall profile of the extrusion part between the clamping block and the clamping column is bevel-shaped, and the outer wall profile of the loosening part between the clamping block and the clamping column is arc-shaped.

[0017] In this technical solution, by setting the outer wall profile of the extrusion part between the clamping block and the clamping column to be bevel-shaped, it plays a role in facilitating the installation between the mounting block and the rotating shaft.

[0018] Preferably, the positioning block forms a telescopic structure with the extrusion rod through a swing rod and the second limiting groove, and the positioning block moves centrically with respect to the central axis of the transmission belt.

[0019] In this technical solution, the rotation of the swing rod drives the positioning block fixedly connected to the extrusion rod to slide along the inner wall of the second limiting groove, playing a role in driving the positioning block to reciprocate telescopically.

[0020] Preferably, the sliding rod and the mounting cover plate form a reciprocating sliding structure through a connecting gear and a clamping rod, and the swing rod and the mounting cover plate form a rotating structure through a connecting rod and a first limiting groove.

[0021] In this technical solution, the rotation of the connecting gear, through the connection of the clamping rod, drives the sliding rod to reciprocate telescopically along the outer wall of the mounting cover plate, playing a role in initially preventing the rotation of the rotating shaft.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: After the mounting cover plate is installed on the protective cover, the mounting block is clamped and fixed with the rotating shaft. When the rotating shaft rotates, it will drive the connecting gear to rotate synchronously. At the same time, the extrusion movement of the connecting gear on the clamping rod drives the sliding rod and the connecting rod to reciprocate telescopically. When the rotating shaft stops rotating, the clamping rod will timely clamp and fix the connecting gear to prevent the rotating shaft from making a rotational movement, initially reducing the situation where the belt makes a rotational movement when the electric cylinder stops being used; While the sliding rod and the connecting rod reciprocate, the connecting rod slides along the inner wall of the first limiting groove, driving the swing rod to continuously rotate. The rotation of the swing rod drives the positioning block to slide along the inner wall of the second limiting groove and reciprocally extrude the extrusion rod, causing the positioning block to reciprocally slide in the center. Under the reciprocating centering movement of the positioning block, effective limiting movement is carried out on both sides of the transmission belt, preventing the transmission belt from slipping left and right during continuous rotation, further improving the telescopic accuracy of the telescopic rod when the electric cylinder drives, and further improving the effect of preventing the telescopic rod from rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a side view schematic diagram of the overall structure of the present invention Figure 1 ; Figure 3 is a sectional view schematic diagram of the overall structure of the present invention Figure 2 ; Figure 4 is a schematic diagram of the sectional structure of the telescopic rod of the present invention; Figure 5 is a schematic diagram of the internal sectional view of the protective cover of the present invention; Figure 6 is a schematic diagram of the disassembled state of the mounting cover plate of the present invention; Figure 7 is a schematic diagram of the structure of the position distribution of the slots of the present invention; Figure 8It is a structural schematic diagram of the connection between the swing rod and the positioning block of the present invention; Figure 9 For the present invention Figure 8 A schematic diagram of the structure enlarged at point A in FIG. Figure 10 It is a structural schematic diagram of the connection between the connecting gear and the mounting block of the present invention; Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure at B in FIG.

[0024] In the figure: 1. electric cylinder housing; 2. protective cover; 3. servo motor; 4. rotating shaft; 5. transmission belt; 6. screw; 7. connecting bearing; 8. threaded slider; 9. telescopic rod; 10. installation cover; 11. connecting block; 12. connecting gear; 13. installation block; 14. clamping rod; 15. sliding rod; 16. first spring; 17. connecting rod; 18. swing rod; 19. first limiting groove; 20. positioning block; 21. second limiting groove; 22. extrusion rod; 23. second spring; 24. slot; 25. connecting block; 26. lifting rod; 27. third spring; 28. pulling block; 29. clamping block; 30. clamping column. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment 1: Reference Figure 1 - Figure 11 , an inner anti-rotation mechanism of a rectangular cylinder electric cylinder, comprising an electric cylinder shell 1, a protective cover 2 is provided on the outer wall of the electric cylinder shell 1, a rotating shaft 4 is rotatably connected to the inner wall of the protective cover 2, a transmission belt 5 is provided on the outer wall of the rotating shaft 4, a screw 6 located inside the electric cylinder shell 1 is fixedly connected to the rotation center of the rotating shaft 4, a threaded slider 8 is threadedly connected to the outer wall of the screw 6, a telescopic rod 9 is fixedly connected to the outer wall of the threaded slider 8, a mounting cover 10 is detachably connected to the outer wall of the protective cover 2, a first clamping assembly is provided on the outer wall of the mounting cover 10, and a second clamping assembly is provided on one side of the transmission belt 5; The first clamping assembly includes a clamping rod 14, the outer wall of the mounting cover plate 10 is fixedly connected to the connecting block 11, the outer wall of the connecting block 11 is rotatably connected to the connecting gear 12, the outer wall of the connecting gear 12 is clamped and connected to the clamping rod 14, and the outer wall of the clamping rod 14 is fixedly connected to the sliding rod 15 that is slidably connected to the outer wall of the connecting block 11; The second engaging component includes a positioning block 20. A swing rod 18 is rotatably connected to the inner wall of the mounting cover plate 10. A positioning block 20 located on one side of the transmission belt 5 is slidably connected to the outer wall of the swing rod 18. An extrusion rod 22 fixedly connected to the outer wall of the positioning block 20 and the outer wall of the mounting cover plate 10 is fixedly connected.

[0027] Among them, after the mounting cover plate 10 is mounted on the protective cover 2, the mounting block 13 and the rotating shaft 4 are engaged and fixed. Under the rotation of the rotating shaft 4, the connecting gear 12 will be driven to rotate synchronously. At the same time, the extrusion movement of the connecting gear 12 on the locking rod 14 drives the sliding rod 15 and the connecting rod 17 to perform reciprocating telescopic movements. When the rotating shaft 4 stops rotating, the locking rod 14 will timely engage and fix the connecting gear 12 to prevent the rotating shaft 4 from having a reverse rotation, initially reducing the situation where the belt has a reverse rotation when the electric cylinder stops being used; While the sliding rod 15 and the connecting rod 17 reciprocate, the connecting rod 17 slides along the inner wall of the first limiting groove 19, driving the swing rod 18 to continuously rotate. The rotation of the swing rod 18 drives the positioning block 20 to slide along the inner wall of the second limiting groove 21 and perform a reciprocating extrusion movement on the extrusion rod 22, causing the positioning block 20 to perform a reciprocating centering slide. Under the reciprocating centering movement of the positioning block 20, effective limiting movements are performed on both sides of the transmission belt 5 to prevent the transmission belt 5 from slipping left and right during continuous rotation, further improving the telescopic accuracy of the telescopic rod 9 when the electric cylinder is driven, and further improving the anti-reverse rotation effect on the telescopic rod 9.

[0028] Embodiment 2: This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to including the technical solutions of the above embodiment, it also has the following technical features. The outer wall contour of the extrusion part of the locking rod 14 and the connecting gear 12 is beveled. A connecting bearing 7 is sleeved on the outer wall of the screw rod 6. A second spring 23 fixedly connected to the outer wall of the positioning block 20 is sleeved on the outer wall of the extrusion rod 22. A first spring 16 fixedly connected to the outer wall of the connecting block 11 is sleeved on the outer wall of the sliding rod 15. One end of the first spring 16 is fixedly connected to a connecting rod 17 fixedly connected to one end of the sliding rod 15. A servo motor 3 fixedly connected to the rotation center of the rotating shaft 4 is fixedly connected to the outer wall of the protective cover 2.

[0029] Among them, through the setting that the outer wall contour of the extrusion part of the locking rod 14 and the connecting gear 12 is beveled, it plays a role in timely engaging and fixing to prevent reverse rotation when the rotating shaft 4 does not rotate.

[0030] Embodiment 3: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to including the technical solutions of the above embodiments, it also has the following technical features. A first limiting groove 19 is provided at the connecting part between the outer wall of the swing rod 18 and the connecting rod 17, and a second limiting groove 21 is provided at the connecting part between the outer wall of the swing rod 18 and the positioning block 20. Moreover, the positions of the first limiting groove 19 and the second limiting groove 21 are equidistantly distributed with respect to the rotation center of the swing rod 18. The clamping rod 14 and the connecting rod 17 are both symmetrically distributed with respect to the rotation center of the connecting gear 12, and the swing rod 18 is slidably connected to the connecting rod 17.

[0031] Among them, by providing the first limiting groove 19 and the second limiting groove 21, it plays a role in driving the clamping rod 14 and the positioning block 20 to be alternately engaged.

[0032] Embodiment 4: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The other end of the second spring 23 is fixedly connected to the outer wall of the mounting cover plate 10. The outer wall contour of the positioning block 20 is U-shaped, and the positioning block 20 is symmetrically arranged on both sides of the transmission belt 5. Moreover, the outer wall spacing of the transmission belt 5 is adaptively set to the inner wall spacing of the positioning block 20.

[0033] Among them, by setting the outer wall contour of the positioning block 20 to be U-shaped, it plays a role in effectively limiting and fixing both sides of the transmission belt 5.

[0034] Embodiment 5: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to including the technical solutions of the above embodiments, it also has the following technical features. A mounting block 13 that is snap-fitted to the outer wall of the rotating shaft 4 is fixedly connected to the rotation center of the connecting gear 12. A slot 24 is provided at the connecting part between the inner wall of the mounting block 13 and the rotating shaft 4. An adapter block 25 is fixedly connected to the outer wall of the mounting block 13. A jacking rod 26 is slidably connected to the outer wall of the adapter block 25. A third spring 27 that is fixedly connected to the outer wall of the adapter block 25 is sleeved on the outer wall of the jacking rod 26. One end of the third spring 27 is fixedly connected to a pull block 28 that is fixedly connected to one end of the jacking rod 26. A clamping block 29 is fixedly connected to one end of the jacking rod 26, and a clamping post 30 that is snap-fitted to the outer wall of the clamping block 29 is fixedly connected to the outer wall of the rotating shaft 4.

[0035] Among them, by providing the clamping post 30, it plays a role in improving the snap-fitting connection between the rotating shaft 4 and the connecting gear 12.

[0036] Embodiment 6: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to the technical solutions of the above embodiment, it also has the following technical features. There are two sets of connection blocks 25 and clamping blocks 29. The position distributions of the two sets of connection blocks 25 and clamping blocks 29 are symmetrical about the central axis of the rotating shaft 4, and the clamping block 29 is arranged on the movement track of the connection block 25.

[0037] Among them, by arranging the clamping block 29 on the movement track of the connection block 25, it plays a role in driving the synchronous rotation between the connecting gear 12 and the rotating shaft 4.

[0038] Embodiment 7: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to the technical solutions of the above embodiment, it also has the following technical features. The outer wall contour of the extrusion part of the clamping block 29 and the clamping column 30 is bevel-shaped, and the outer wall contour of the loosening part of the clamping block 29 and the clamping column 30 is arc-shaped.

[0039] Among them, by setting the outer wall contour of the extrusion part of the clamping block 29 and the clamping column 30 to be bevel-shaped, it plays a role in facilitating the installation and use between the mounting block 13 and the rotating shaft 4.

[0040] Embodiment 8: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to the technical solutions of the above embodiment, it also has the following technical features. The positioning block 20 and the extrusion rod 22 form a telescopic structure through the swing rod 18 and the second limiting groove 21, and the positioning block 20 moves centrically with respect to the central axis of the transmission belt 5.

[0041] Among them, through the rotation of the swing rod 18, it drives the positioning block 20 fixedly connected to the extrusion rod 22 to slide along the inner wall of the second limiting groove 21, playing a role in driving the reciprocating telescopic movement of the positioning block 20.

[0042] Embodiment 9: This embodiment provides an anti-rotation mechanism inside a rectangular cylinder electric cylinder. In addition to the technical solutions of the above embodiment, it also has the following technical features. The sliding rod 15 and the mounting cover plate 10 form a reciprocating sliding structure through the connecting gear 12 and the clamping rod 14, and the swing rod 18 and the mounting cover plate 10 form a rotating structure through the connecting rod 17 and the first limiting groove 19.

[0043] Among them, through the rotation of the connecting gear 12 and the connection of the clamping rod 14, it drives the sliding rod 15 to perform reciprocating telescopic movement along the outer wall of the mounting cover plate 10, playing a role in initially preventing the rotation of the rotating shaft 4.

[0044] During use, after installing the installation cover plate 10 on the protective cover 2, the installation block 13 is engaged and fixed with the rotating shaft 4. Under the rotation of the rotating shaft 4, the connecting gear 12 will be driven to rotate synchronously. At the same time, the extrusion movement of the connecting gear 12 on the clamping rod 14 drives the sliding rod 15 and the connecting rod 17 to perform reciprocating telescopic movements. When the rotating shaft 4 stops rotating, the clamping rod 14 will promptly engage and fix the connecting gear 12 to prevent the rotating shaft 4 from having a reverse rotation, initially reducing the situation where the belt has a reverse rotation when the electric cylinder stops being used. While the sliding rod 15 and the connecting rod 17 slide reciprocally, the connecting rod 17 slides along the inner wall of the first limiting groove 19, driving the swing rod 18 to continuously rotate. The rotation of the swing rod 18 drives the positioning block 20 to slide along the inner wall of the second limiting groove 21 and perform a reciprocating extrusion movement on the extrusion rod 22, causing the positioning block 20 to perform a reciprocating centering slide. Under the reciprocating centering movement of the positioning block 20, effective limiting movements are performed on both sides of the transmission belt 5 to prevent the transmission belt 5 from slipping left and right during continuous rotation, further improving the telescopic accuracy of the telescopic rod 9 when the electric cylinder is driving, and further improving the effect of preventing the reverse rotation of the telescopic rod 9.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An anti-rotation mechanism inside a rectangular cylinder electric cylinder, comprising an electric cylinder housing (1), characterized in that, A protective cover (2) is provided on the outer wall of the electric cylinder housing (1). A rotating shaft (4) is rotatably connected to the inner wall of the protective cover (2). A transmission belt (5) is provided on the outer wall of the rotating shaft (4). A screw rod (6) located inside the electric cylinder housing (1) is fixedly connected to the rotation center of the rotating shaft (4). A threaded slider (8) is threadedly connected to the outer wall of the screw rod (6). An expansion rod (9) is fixedly connected to the outer wall of the threaded slider (8). An installation cover plate (10) is detachably connected to the outer wall of the protective cover (2). A first clamping component is provided on the outer wall of the installation cover plate (10). A second clamping component is provided on one side of the transmission belt (5). The first clamping component includes a clamping rod (14). A connecting block (11) is fixedly connected to the outer wall of the installation cover plate (10). A connecting gear (12) is rotatably connected to the outer wall of the connecting block (11). The clamping rod (14) is clamped to the outer wall of the connecting gear (12). A sliding rod (15) slidably connected to the outer wall of the connecting block (11) is fixedly connected to the outer wall of the clamping rod (14). The second clamping component includes a positioning block (20). A swinging rod (18) is rotatably connected to the inner wall of the installation cover plate (10). The positioning block (20) located on one side of the transmission belt (5) is slidably connected to the outer wall of the swinging rod (18). An extrusion rod (22) fixedly connected to the outer wall of the installation cover plate (10) is fixedly connected to the outer wall of the positioning block (20).

2. The anti-rotation mechanism inside a rectangular cylinder electric cylinder according to claim 1, characterized in that, The outer wall contour of the extrusion part of the clamping rod (14) and the connecting gear (12) is beveled. A connecting bearing (7) is sleeved on the outer wall of the screw rod (6). A second spring (23) fixedly connected to the outer wall of the positioning block (20) is sleeved on the outer wall of the extrusion rod (22). A first spring (16) fixedly connected to the outer wall of the connecting block (11) is sleeved on the outer wall of the sliding rod (15). One end of the first spring (16) is fixedly connected to a connecting rod (17) fixedly connected to one end of the sliding rod (15). A servo motor (3) fixedly connected to the rotation center of the rotating shaft (4) is fixedly connected to the outer wall of the protective cover (2).

3. The anti-rotation mechanism inside a rectangular cylinder electric cylinder according to claim 2, characterized in that, A first limiting groove (19) is formed at the connecting part of the outer wall of the swinging rod (18) and the connecting rod (17). A second limiting groove (21) is formed at the connecting part of the outer wall of the swinging rod (18) and the positioning block (20). The positions of the first limiting groove (19) and the second limiting groove (21) are equidistantly distributed about the rotation center of the swinging rod (18). The clamping rod (14) and the connecting rod (17) are symmetrically distributed about the rotation center of the connecting gear (12). The swinging rod (18) and the connecting rod (17) are slidably connected to each other.

4. The anti-rotation mechanism inside a rectangular cylinder electric cylinder according to claim 2, characterized in that, The other end of the second spring (23) is fixedly connected to the outer wall of the installation cover plate (10). The outer wall contour of the positioning block (20) is U-shaped. The positioning blocks (20) are symmetrically arranged on both sides of the transmission belt (5). The distance between the outer walls of the transmission belt (5) is adapted to the distance between the inner side walls of the positioning blocks (20).

5. The internal anti-rotation mechanism of a rectangular cylinder electric cylinder according to claim 1, characterized in that, A mounting block (13) fixedly connected to the rotation center of the connecting gear (12) and engagingly connected to the outer wall of the rotating shaft (4) is provided. A slot (24) is formed at the connecting portion between the inner wall of the mounting block (13) and the rotating shaft (4). An engaging block (25) is fixedly connected to the outer wall of the mounting block (13). A jacking rod (26) is slidably connected to the outer wall of the engaging block (25). A third spring (27) fixedly connected to the outer wall of the engaging block (25) is sleeved on the outer wall of the jacking rod (26). One end of the third spring (27) is fixedly connected to a pulling block (28) fixedly connected to one end of the jacking rod (26). A clamping block (29) is fixedly connected to one end of the jacking rod (26). A clamping column (30) engagingly connected to the outer wall of the clamping block (29) is fixedly connected to the outer wall of the rotating shaft (4).

6. The internal anti-rotation mechanism of a rectangular cylinder electric cylinder according to claim 5, characterized in that, Two sets of the engaging blocks (25) and the clamping blocks (29) are provided. The positions of the two sets of the engaging blocks (25) and the clamping blocks (29) are symmetrically distributed about the central axis of the rotating shaft (4), and the clamping blocks (29) are arranged on the movement tracks of the engaging blocks (25).

7. The anti-rotation mechanism inside a rectangular cylinder electric cylinder according to claim 5, characterized in that, The outer wall contour of the extrusion portion between the clamping block (29) and the clamping column (30) is bevel-shaped, and the outer wall contour of the loosening portion between the clamping block (29) and the clamping column (30) is arc-shaped.

8. The internal anti-rotation mechanism of a rectangular cylinder electric cylinder according to claim 3, characterized in that, The positioning block (20) and the extrusion rod (22) form a telescopic structure through the swing rod (18) and the second limiting groove (21), and the positioning block (20) moves centrally with respect to the central axis of the transmission belt (5).

9. The anti-rotation mechanism inside a rectangular cylinder electric cylinder according to claim 3, characterized in that, The sliding rod (15) and the mounting cover plate (10) form a reciprocating sliding structure through the connecting gear (12) and the clamping rod (14), and the swing rod (18) and the mounting cover plate (10) form a rotating structure through the connecting rod (17) and the first limiting groove (19).

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