An internal anti-rotation mechanism for a rectangular cylinder electric cylinder

Abstract

The present invention discloses an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. The present invention relates to the technical field of rectangular electric cylinders, comprising an electric cylinder housing, wherein the outer wall of the electric cylinder housing is provided with a protective cover, the outer wall of the protective cover is fixedly connected to a servo motor, the output end of the servo motor is fixedly connected to a rotating shaft, the outer wall of the rotating shaft is provided with a transmission belt, the rotation center of the rotating shaft is fixedly connected to a screw located inside the electric cylinder housing, the outer wall of the screw is sleeved with a connecting bearing, the outer wall of the screw is threadedly connected to a threaded slider, and the outer wall of the threaded slider is fixedly connected to a telescopic rod sleeved on the outer wall of the screw. By providing the above structure, the present invention can timely engage and lock the rotating shaft after it stops when the rotating shaft and the transmission belt drive the screw to perform continuous rotational motion, and prevent the belt from deviating left and right while the rotating shaft continues to rotate.

Description

Technical Field

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

[0002] The reliability and life of the anti-rotation mechanism of the electric cylinder are important indicators for evaluating the reliability and life of the electric cylinder. The internal anti-rotation mechanism has the advantages of compact structure, small size, good sealing conditions, etc., and has been widely used in electric cylinders. However, the internal anti-rotation mechanism in the existing technology is based on the screw transmission and achieves anti-rotation effect by adding other relatively independent devices. The structure is large in size and the assembly is relatively cumbersome. At the same time, when the driving rod of the electric cylinder makes 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. Long-term work leads to wear of the anti-rotation mechanism, which will not only cause failure of the anti-rotation mechanism, but also reduce the movement accuracy of the electric cylinder and increase the load. At the same time, it is necessary to process keys or grooves inside the cylinder body, which increases the difficulty of processing. It is difficult to guarantee the working accuracy by using customized profiles.

[0003] The present invention relates to a novel electric cylinder which is convenient for use in preventing the rotation of the electric cylinder and is suitable for preventing the rotation of the electric cylinder. However, an anti-rotation mechanism is often added at the position of the threaded slider when the electric cylinder is prevented from rotating. The threaded slider is driven by the screw driven by the synchronous belt, and the synchronous belt is at the driving source of the electric cylinder. When the driving shaft of the synchronous belt stops, the timely engagement and fixing effect of the driving shaft is not high, so that when the driving shaft rotates, the screw rotates, and the anti-rotation mechanism provided at the threaded slider still affects the 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 engaged and fixed, the anti-deviating effect of the left and right sides of the transmission belt is not high when the transmission belt continues to rotate, so that the transmission belt will slip left and right due to friction when the transmission belt continues to rotate, affecting the accuracy of the telescopic use of the electric cylinder and being unfavorable for the staff to use. For this reason, we propose an internal anti-rotation mechanism for an electric cylinder with a rectangular cylinder body. Summary of the Invention

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An internal anti-rotation mechanism for a rectangular cylinder electric cylinder, comprising an electric cylinder housing, a protective cover provided on the outer wall of the electric cylinder housing, a rotating shaft rotatably connected to the inner wall of the protective cover, a transmission belt provided on the outer wall of the rotating shaft, a screw located inside the electric cylinder housing fixedly connected to the rotation center of the rotating shaft, a threaded slider threadedly connected to the outer wall of the screw, a telescopic rod fixedly connected to the outer wall of the threaded slider, a mounting cover detachably connected to the outer wall of the protective cover, a first clamping assembly provided on the outer wall of the mounting cover, and a second clamping assembly provided on one side of the transmission belt;

[0006] The first engaging assembly includes a clamping rod, an outer wall of the mounting cover is fixedly connected to a connecting block, an outer wall of the connecting block is rotatably connected to a connecting gear, an outer wall of the connecting gear is clamped and connected to the clamping rod, and an outer wall of the clamping rod is fixedly connected to a sliding rod slidably connected to the outer wall of the connecting block;

[0007] The second locking assembly includes a positioning block, the inner wall of the mounting cover is rotatably connected to a swing rod, the outer wall of the swing rod is slidably connected to a positioning block located on one side of the transmission belt, and the outer wall of the positioning block is fixedly connected to an extrusion rod fixedly connected to the outer wall of the mounting cover.

[0008] In this technical solution, after the mounting cover is mounted on the protective cover, the mounting block is engaged and fixed with the rotating shaft. Under the rotation of the rotating shaft, the connecting gear is driven to rotate synchronously. At the same time, the squeezing movement of the connecting gear on the clamping rod drives the sliding rod and the connecting rod to perform reciprocating telescopic movement. When the rotating shaft stops rotating, the clamping rod will promptly engage and fix the connecting gear to prevent the rotating shaft from rotating, thereby preliminarily reducing the possibility of the belt rotating when the electric cylinder is not in use.

[0009] When the sliding rod and the connecting rod slide back and forth, the connecting rod slides along the inner wall of the first limiting groove, driving the swing rod to rotate continuously. The rotation of the swing rod drives the positioning block to slide along the inner wall of the second limiting groove, and performs a reciprocating extrusion motion on the extrusion rod, so that the positioning block slides back and forth in the center. Under the reciprocating centering motion of the positioning block, effective limiting motion is performed on both sides of the transmission belt to prevent the transmission belt from slipping left and right during continuous rotation, further improving the extension and retraction accuracy of the telescopic rod when driven by the electric cylinder, and further improving the anti-rotation effect of the telescopic rod.

[0010] Preferably, the outer wall contour of the extrusion part of the clamping rod and the connecting gear is an inclined surface, the outer wall of the screw rod is sleeved with a connecting bearing, the outer wall of the extrusion rod is sleeved with a second spring fixedly connected to the outer wall of the positioning block, the outer wall of the sliding rod is sleeved with a first spring fixedly connected to the outer wall of the connecting block, one end of the first spring is fixedly connected to a connecting rod fixedly connected to one end of the sliding rod, and the outer wall of the protective cover is fixedly connected to a servo motor fixedly connected to the rotation center of the rotating shaft.

[0011] In this technical solution, the outer wall profile of the extrusion part between the clamping rod and the connecting gear is arranged in an inclined surface, so as to timely engage and fix the rotating shaft to prevent rotation when the rotating shaft is not rotating.

[0012] Preferably, a first limiting groove is provided at the connection position between the outer wall of the swing arm and the connecting rod, and a second limiting groove is provided at the connection position between the outer wall of the swing arm and the positioning block, and the positions of the first limiting groove and the second limiting groove are equidistantly distributed about the rotation center of the swing arm, the clamping rod and the connecting rod are symmetrically distributed about the rotation center of the connecting gear, and the swing arm and the connecting rod are in a sliding connection.

[0013] In this technical solution, the first limiting groove and the second limiting groove are provided to drive the clamping rod and the positioning block to be alternately engaged and used.

[0014] Preferably, the other end of the second spring is fixedly connected to the outer wall of the mounting cover, 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, and the outer wall spacing of the transmission belt is adapted to the inner wall spacing of the positioning blocks.

[0015] In this technical solution, the outer wall profile of the positioning block is set in a U-shape, which plays a role in effectively limiting and fixing the two sides of the transmission belt.

[0016] Preferably, the rotation center of the connecting gear is fixedly connected to a mounting block that is engaged with the outer wall of the rotating shaft, a slot is provided at the connection part between the inner wall of the mounting block and the rotating shaft, the outer wall of the mounting block is fixedly connected to a connecting block, the outer wall of the connecting block is slidably connected to a lifting rod, the outer wall of the lifting rod is sleeved with a third spring that is fixedly connected to the outer wall of the connecting block, one end of the third spring is fixedly connected to a pulling block that is fixedly connected to one end of the lifting rod, one end of the lifting rod is fixedly connected to a clamping block, and the outer wall of the rotating shaft is fixedly connected to a clamping column that is engaged with the outer wall of the clamping block.

[0017] In this technical solution, the provided clamping column plays a role in improving the engagement and connection between the rotating shaft and the connecting gear.

[0018] Preferably, two groups of the connecting blocks and the clamping blocks are provided, the positions of the two groups of the connecting blocks and the clamping blocks are symmetrical about the central axis of the rotating shaft, and the clamping blocks are provided on the motion trajectory of the connecting blocks.

[0019] In this technical solution, the clamping block is arranged on the motion track of the connecting block, which plays a role in driving the connecting gear and the rotating shaft to rotate synchronously.

[0020] Preferably, the outer wall contour of the squeezed portion between the clamping block and the clamping column is an inclined surface, and the outer wall contour of the loosened portion between the clamping block and the clamping column is an arc shape.

[0021] In this technical solution, the outer wall profiles of the extrusion parts of the clamping block and the clamping column are arranged in an inclined surface, so that the installation block and the rotating shaft can be easily installed and used.

[0022] Preferably, the positioning block forms a telescopic structure through the swing rod, the second limiting groove and the extrusion rod, and the positioning block moves in a centering manner about the central axis of the transmission belt.

[0023] 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, thereby driving the positioning block to perform reciprocating telescopic motion.

[0024] Preferably, the sliding rod forms a reciprocating sliding structure with the mounting cover plate through the connecting gear and the clamping rod, and the swing rod forms a rotating structure with the mounting cover plate through the connecting rod and the first limiting groove.

[0025] In this technical solution, by rotating the connecting gear and connecting the clamping rod, the sliding rod is driven to perform reciprocating telescopic motion along the outer wall of the mounting cover, thereby playing a role in initially preventing the rotating shaft from rotating.

[0026] Compared with the prior art, the present invention has the following beneficial effects: after the mounting cover is mounted on the protective cover, the mounting block is engaged and fixed with the rotating shaft. Under the rotation of the rotating shaft, the connecting gear is driven to rotate synchronously. At the same time, the squeezing movement of the connecting gear on the clamping rod drives the sliding rod and the connecting rod to perform reciprocating telescopic movement. When the rotating shaft stops rotating, the clamping rod will promptly engage and fix the connecting gear to prevent the rotating shaft from rotating, thereby preliminarily reducing the situation where the belt of the electric cylinder rotates when it is not in use.

[0027] When the sliding rod and the connecting rod slide back and forth, the connecting rod slides along the inner wall of the first limiting groove, driving the swing rod to rotate continuously. The rotation of the swing rod drives the positioning block to slide along the inner wall of the second limiting groove, and performs a reciprocating extrusion motion on the extrusion rod, so that the positioning block slides back and forth in the center. Under the reciprocating centering motion of the positioning block, effective limiting motion is performed on both sides of the transmission belt to prevent the transmission belt from slipping left and right during continuous rotation, further improving the extension and retraction accuracy of the telescopic rod when driven by the electric cylinder, and further improving the anti-rotation effect of the telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 The overall structure of the present invention is shown in side view Figure 1 ;

[0030] Figure 3The overall structure of the present invention is schematically shown in cross-section Figure 2 ;

[0031] Figure 4 This is a schematic cross-sectional view of the telescopic rod of the present invention;

[0032] Figure 5 This is a schematic cross-sectional view of the interior of the protective cover of the present invention;

[0033] Figure 6 This is a schematic diagram of the cover plate of the present invention in the installed and disassembled state;

[0034] Figure 7 This is a schematic diagram of the structure of the slot position distribution of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the connection between the swing rod and the positioning block of the present invention;

[0036] Figure 9 For the present invention Figure 8 A schematic diagram of the structure enlarged at point A in FIG;

[0037] Figure 10 This is a schematic structural diagram of the connection between the connecting gear and the mounting block of the present invention;

[0038] Figure 11 For the present invention Figure 10 Schematic diagram of the structure enlarged at point B in FIG.

[0039] 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. Mounting cover; 11. Connecting block; 12. Connecting gear; 13. Mounting block; 14. Clamping rod; 15. Sliding rod; 16. First spring; 17. Connecting rod; 18. Swinging 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. Pull block; 29. ​​Clamping block; 30. Clamping column. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0041] Example 1:

[0042] Reference Figure 1 - Figure 11, an internal anti-rotation mechanism of a rectangular cylinder electric cylinder, comprising an electric cylinder housing 1, a protective cover 2 being provided on the outer wall of the electric cylinder housing 1, a rotating shaft 4 being rotatably connected to the inner wall of the protective cover 2, a transmission belt 5 being provided on the outer wall of the rotating shaft 4, a screw 6 located inside the electric cylinder housing 1 being fixedly connected to the rotation center of the rotating shaft 4, a threaded slider 8 being threadedly connected to the outer wall of the screw 6, a telescopic rod 9 being fixedly connected to the outer wall of the threaded slider 8, a mounting cover 10 being detachably connected to the outer wall of the protective cover 2, a first clamping assembly being provided on the outer wall of the mounting cover 10, and a second clamping assembly being provided on one side of the transmission belt 5;

[0043] The first engaging assembly includes a lever 14. The outer wall of the mounting cover 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 engaged with the lever 14. The outer wall of the lever 14 is fixedly connected to the sliding rod 15 that is slidably connected to the outer wall of the connecting block 11.

[0044] The second locking assembly includes a positioning block 20, the inner wall of the mounting cover 10 is rotatably connected to the swing rod 18, the outer wall of the swing rod 18 is slidably connected to the positioning block 20 located on one side of the transmission belt 5, and the outer wall of the positioning block 20 is fixedly connected to the extrusion rod 22 fixedly connected to the outer wall of the mounting cover 10.

[0045] Among them, after the installation cover 10 is installed 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 connecting gear 12 squeezes the clamping rod 14, driving the sliding rod 15 and the connecting rod 17 to reciprocate and extend. 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 rotating, thereby preliminarily reducing the situation where the belt of the electric cylinder rotates when it is not in use.

[0046] While the sliding rod 15 and the connecting rod 17 slide back and forth, the connecting rod 17 slides along the inner wall of the first limiting groove 19, driving the swing rod 18 to rotate continuously. 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 performs a reciprocating extrusion motion on the extrusion rod 22, so that the positioning block 20 slides back and forth in centering. Under the reciprocating centering motion of the positioning block 20, effective limiting motion is 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 driven by the electric cylinder, and further improving the anti-rotation effect of the telescopic rod 9.

[0047] Example 2:

[0048] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the outer wall contour of the extrusion part of the clamping rod 14 and the connecting gear 12 is an inclined surface, the outer wall of the screw 6 is sleeved with a connecting bearing 7, the outer wall of the extrusion rod 22 is sleeved with a second spring 23 fixedly connected to the outer wall of the positioning block 20, the outer wall of the sliding rod 15 is sleeved with a first spring 16 fixedly connected to the outer wall of the connecting block 11, 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, and the outer wall of the protective cover 2 is fixedly connected to a servo motor 3 fixedly connected to the rotation center of the rotating shaft 4.

[0049] The outer wall profile of the extrusion portion between the clamping rod 14 and the connecting gear 12 is arranged in an inclined surface, so that the rotating shaft 4 is timely engaged and fixed to prevent rotation when it is not rotating.

[0050] Example 3:

[0051] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: a first limiting groove 19 is provided at the connection position between the outer wall of the swing rod 18 and the connecting rod 17, and a second limiting groove 21 is provided at the connection position between the outer wall of the swing 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 swing rod 18, the locking rod 14 and the connecting rod 17 are symmetrically distributed about the rotation center of the connecting gear 12, and the swing rod 18 and the connecting rod 17 are slidingly connected.

[0052] The first limiting groove 19 and the second limiting groove 21 are provided to drive the clamping rod 14 and the positioning block 20 to be alternately engaged with each other.

[0053] Example 4:

[0054] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned 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 10, the outer wall profile of the positioning block 20 is U-shaped, and the positioning blocks 20 are symmetrically arranged on both sides of the transmission belt 5, and the outer wall spacing of the transmission belt 5 is adapted to the inner wall spacing of the positioning blocks 20.

[0055] The U-shaped outer wall profile of the positioning block 20 effectively limits and fixes both sides of the transmission belt 5 .

[0056] Example 5:

[0057] The present embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the rotation center of the connecting gear 12 is fixedly connected to a mounting block 13 that is engaged with the outer wall of the rotating shaft 4; a slot 24 is provided at the connection portion between the inner wall of the mounting block 13 and the rotating shaft 4; the outer wall of the mounting block 13 is fixedly connected to a connecting block 25; the outer wall of the connecting block 25 is slidably connected to a lifting rod 26; the outer wall of the lifting rod 26 is sleeved with a third spring 27 that is fixedly connected to the outer wall of the connecting block 25; one end of the third spring 27 is fixedly connected to a pulling block 28 that is fixedly connected to one end of the lifting rod 26; one end of the lifting rod 26 is fixedly connected to a clamping block 29; the outer wall of the rotating shaft 4 is fixedly connected to a clamping column 30 that is engaged with the outer wall of the clamping block 29.

[0058] The provided clamping column 30 can improve the engagement and connection between the rotating shaft 4 and the connecting gear 12 .

[0059] Example 6:

[0060] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: two groups of connecting blocks 25 and clamping blocks 29 are provided, and the position distribution of the two groups of connecting blocks 25 and clamping blocks 29 is symmetrical about the central axis of the rotating shaft 4, and the clamping blocks 29 are arranged on the motion trajectory of the connecting blocks 25.

[0061] The clamping block 29 is arranged on the motion track of the connecting block 25 , thereby driving the connecting gear 12 and the rotating shaft 4 to rotate synchronously.

[0062] Example 7:

[0063] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, 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 an inclined surface, and the outer wall contour of the loosening part of the clamping block 29 and the clamping column 30 is an arc shape.

[0064] The outer wall profile of the extrusion portion of the clamping block 29 and the clamping column 30 is arranged in an inclined surface, thereby facilitating the installation and use of the mounting block 13 and the rotating shaft 4 .

[0065] Example 8:

[0066] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the positioning block 20 forms a telescopic structure through the swing rod 18 and the second limit groove 21 and the extrusion rod 22, and the positioning block 20 moves in a centering manner about the central axis of the transmission belt 5.

[0067] The rotation of the swing rod 18 drives the positioning block 20 fixedly connected to the extrusion rod 22 to slide along the inner wall of the second limiting groove 21 , thereby driving the positioning block 20 to perform reciprocating telescopic motion.

[0068] Example 9:

[0069] This embodiment provides an internal anti-rotation mechanism for a rectangular cylinder electric cylinder. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the sliding rod 15 forms a reciprocating sliding structure with the mounting cover 10 through the connecting gear 12 and the clamping rod 14, and the swing rod 18 forms a rotating structure with the mounting cover 10 through the connecting rod 17 and the first limiting groove 19.

[0070] Among them, through the rotation of the connecting gear 12 and the connection of the clamping rod 14, the sliding rod 15 is driven to perform reciprocating telescopic motion along the outer wall of the installation cover 10, which plays a role in preliminarily preventing the rotating shaft 4 from rotating.

[0071] During use, after the mounting cover 10 is mounted on the protective cover 2, the mounting block 13 is engaged and fixed with the rotating shaft 4. Under the rotation of the rotating shaft 4, the connecting gear 12 is driven to rotate synchronously. At the same time, the connecting gear 12 squeezes the clamping rod 14, driving the sliding rod 15 and the connecting rod 17 to perform reciprocating telescopic motion. 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 rotating, thereby preliminarily reducing the possibility of the belt rotating when the electric cylinder is not in use.

[0072] While the sliding rod 15 and the connecting rod 17 slide back and forth, the connecting rod 17 slides along the inner wall of the first limiting groove 19, driving the swing rod 18 to rotate continuously. 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 performs a reciprocating extrusion motion on the extrusion rod 22, so that the positioning block 20 slides back and forth in centering. Under the reciprocating centering motion of the positioning block 20, effective limiting motion is 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 driven by the electric cylinder, and further improving the anti-rotation effect of the telescopic rod 9.

[0073] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An internal anti-rotation mechanism for a rectangular cylinder electric cylinder, comprising an electric cylinder housing (1), characterized in that: The outer wall of the electric cylinder housing (1) is provided with a protective cover (2), the inner wall of the protective cover (2) is rotatably connected to a rotating shaft (4), the outer wall of the rotating shaft (4) is provided with a transmission belt (5), the rotation center of the rotating shaft (4) is fixedly connected to a screw rod (6) located inside the electric cylinder housing (1), the outer wall of the screw rod (6) is threadedly connected to a threaded slider (8), the outer wall of the threaded slider (8) is fixedly connected to a telescopic rod (9), the outer wall of the protective cover (2) is detachably connected to a mounting cover plate (10), the outer wall of the mounting cover plate (10) is provided with a first clamping assembly, and a second clamping assembly is provided on one side of the transmission belt (5); The first engaging assembly comprises a clamping rod (14), the outer wall of the mounting cover (10) is fixedly connected to a connecting block (11), the outer wall of the connecting block (11) is rotatably connected to a 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 a sliding rod (15) slidably connected to the outer wall of the connecting block (11); The second engaging assembly comprises a positioning block (20), the inner wall of the mounting cover (10) is rotatably connected to a swing rod (18), the outer wall of the swing rod (18) is slidably connected to a positioning block (20) located on one side of the transmission belt (5), and the outer wall of the positioning block (20) is fixedly connected to an extrusion rod (22) fixedly connected to the outer wall of the mounting cover (10).

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

3. The inner anti-rotation mechanism of a rectangular cylinder electric cylinder according to claim 2, characterized in that: A first limiting groove (19) is provided at a connection portion between the outer wall of the swinging rod (18) and the connecting rod (17), and a second limiting groove (21) is provided at a connection portion between 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), and the swinging rod (18) and the connecting rod (17) are in sliding connection.

4. The inner anti-rotation mechanism of 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 mounting cover (10), the outer wall profile of the positioning block (20) is U-shaped, and the positioning blocks (20) are symmetrically arranged on both sides of the transmission belt (5), and the outer wall spacing of the transmission belt (5) and the inner wall spacing of the positioning blocks (20) are adapted to each other.

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

6. The inner anti-rotation mechanism of a rectangular cylinder electric cylinder according to claim 5, characterized in that: The connecting blocks (25) and the clamping blocks (29) are each provided in two groups, and the positions of the two groups of connecting blocks (25) and the clamping blocks (29) are symmetrical about the central axis of the rotating shaft (4), and the clamping blocks (29) are provided on the motion trajectory of the connecting blocks (25).

7. The inner anti-rotation mechanism of a rectangular cylinder electric cylinder according to claim 5, characterized in that: The outer wall contours of the extrusion parts of the clamping block (29) and the clamping column (30) are inclined, and the outer wall contours of the loosening parts of the clamping block (29) and the clamping column (30) are arc-shaped.

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

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

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