An automatic power metering box

Abstract

The present invention belongs to the field of electric power automation metering boxes, in particular to an automated electric power metering box. Existing automated electric power metering boxes are usually installed at different heights. Electric power personnel need to perform high-altitude operations during meter reading, which poses certain safety hazards. At the same time, the outer side of the automated electric power metering box is exposed to the outside and lacks protection. Once it is hit hard, it will be damaged, resulting in the loss of metering data. The following scheme is now proposed, which includes an automated electric power metering box, and mounting frames are fixedly installed on the left and right sides of the automated electric power metering box. The present invention starts an electric push rod first and then starts a motor, so that the motor can drive a mobile housing and the automated electric power metering box to move upward or downward, thereby facilitating the use of the automated electric power metering box. At the same time, when the automated electric power metering box is not in use, the baffle can also protect the automated electric power metering box.

Description

Technical Field

[0001] The invention relates to the technical field of electric power automation metering boxes, and in particular to an automatic electric power metering box. Background Art

[0002] Some automatic power meter boxes are installed on the roadsides or on the external electric poles of some old residential areas to observe the power consumption in a certain specific area. However, the automatic power meter boxes in the prior art are usually installed at different heights. Power personnel need to perform high-altitude operations during meter reading, which poses certain safety hazards. At the same time, the outer side of the automatic power meter box is exposed to the outside and lacks protection. Once it is hit hard, it will be damaged, resulting in loss of metering data. Therefore, the present invention proposes an automatic power meter box to solve the above problems. Summary of the invention

[0003] Based on the background technology, automated electricity meter boxes are usually installed at different heights. Electric power personnel need to perform high-altitude operations during meter reading, which poses certain safety hazards. At the same time, the outer side of the automated electricity meter box is exposed to the outside and lacks protection. Once it is hit hard, it will be damaged, resulting in loss of metering data. The present invention proposes an automated electricity meter box.

[0004] An automated power metering box proposed in the present invention comprises an automated power metering box, wherein mounting frames are fixedly installed on the left and right sides of the automated power metering box, and the sides of the two mounting frames close to each other are rotatably connected to the same baffle, a positioning wheel is provided on the left side of the mounting frame at the left position, the positioning wheel passes through the mounting frame at the left position, and the right side of the positioning wheel is fixedly connected to the left side of the baffle, a control mechanism and a positioning mechanism are respectively provided on the mounting frame at the left position, and the positioning mechanism cooperates with the positioning wheel and the control mechanism respectively, a mobile shell is fixedly installed on the rear side of the automated power metering box, a rack slide is slidably connected to the inner wall of the mobile shell, a motor is rotatably connected to the inner wall of the mobile shell, a gear is fixedly installed on the front end of the motor output shaft, the gear is meshed with the rack slide, an unlocking mechanism and a fitting mechanism are respectively provided in the mobile shell, and the fitting mechanism cooperates with the rack slide and the unlocking mechanism respectively.

[0005] Preferably, the positioning mechanism includes a fixed block, a positioning spring, a positioning frame, a pulling frame and a rotating frame, the fixed block is fixedly installed on the left side of the mounting frame located at the left position, the fixed block is fixedly connected to the positioning spring, the positioning spring is fixedly connected to the positioning frame, the positioning frame is slidably connected to the left side of the mounting frame located at the left position, the positioning frame cooperates with the positioning wheel, the pulling frame is rotatably connected to the positioning frame, the pulling frame is rotatably connected to the rotating frame, and the rotating frame is rotatably connected to the left side of the mounting frame located at the left position.

[0006] Furthermore, through the positioning mechanism, the positioning mechanism can position the positioning wheel on the mounting frame at the left position, so that the positioning wheel cannot rotate. The positioning wheel can position the baffle, and the baffle can continuously close or open the automated power metering box.

[0007] Preferably, the control mechanism includes an unlocking frame, a laminating frame, two return springs and a sliding frame, the sliding frame is slidably connected to the rotating frame, the laminating frame is slidably connected to the front side of the sliding frame, the laminating frame is fixedly connected to the return spring, the return spring is fixedly connected to the sliding frame, the unlocking frame is slidably connected to the front side of the rotating frame, the unlocking frame is fixedly connected to the laminating frame, and the sliding frame is slidably connected to the pulling frame.

[0008] Furthermore, through the control mechanism, the control mechanism is used to control the positioning mechanism on the left side of the left position mounting frame to continuously release the positioning wheel, so that the baffle can be continuously released, which is convenient for controlling the baffle to open or close the automated power metering box.

[0009] Preferably, the unlocking mechanism includes a spring seat, a compression spring, a positioning rod, a pulling rod, a matching frame and an electric push rod, the spring seat is fixedly mounted on the inner wall of the mobile housing, the spring seat is fixedly connected to the compression spring, the compression spring is fixedly connected to the positioning rod, the positioning rod is rotatably connected to the pulling rod, the pulling rod is rotatably connected to the matching frame, the matching frame is slidably connected to the inner wall of the mobile housing, and the matching frame matches the electric push rod.

[0010] Furthermore, through the unlocking mechanism, the unlocking mechanism is used to unlock the rack slide rail in the mobile housing, so that after the motor drives the gear to rotate, the gear can rotate on the rack slide rail, which can drive the mobile housing to move, and the mobile housing can drive the automated power meter box to rise or fall, making it convenient to read the meter of the automated power meter box.

[0011] Preferably, the fitting mechanism includes a rotating rod, a fixed plate, an auxiliary rod, a positioning rack, a docking block and an auxiliary spring, the rotating rod is rotatably connected to the inner wall of the movable shell, the rotating rod is rotatably connected to the auxiliary rod, the auxiliary rod is rotatably connected to the positioning rack, the positioning rack is slidably connected to the inner wall of the movable shell, the positioning rack is fixedly connected to the auxiliary spring, the auxiliary spring is fixedly connected to the fixed plate, the fixed plate is fixedly installed on the inner wall of the movable shell, the positioning rack is meshed with the rack slide rail, and a fitting groove is provided at the bottom of the docking block.

[0012] Furthermore, through the fitting mechanism, the fitting mechanism is used to position the rack slide rail in the mobile housing, so that after the motor drives the gear to rotate, it cannot drive the mobile housing and the automated power meter box to move, thereby achieving the positioning of the automated power meter box, greatly increasing the stability of the automated power meter box during use.

[0013] Preferably, the positioning wheel is provided with a plurality of positioning grooves arranged at equal intervals, and the top end of the positioning frame is in sliding contact with the inner wall of the positioning groove.

[0014] Furthermore, after the positioning frame is inserted into the positioning groove, the positioning frame can block the positioning wheel from rotating, thereby blocking the baffle from rotating, and thus achieving the positioning of the baffle.

[0015] Preferably, a triangular block is fixedly mounted on the top of the positioning rod, and the outer side of the triangular block is in sliding contact with the inner wall of the fitting groove.

[0016] Furthermore, after the triangular block is inserted into the fitting groove, the triangular block can block the movement of the docking block, thereby realizing the positioning of the positioning rack, so that the positioning rack can continuously and stably position the automated power metering box in the mobile housing.

[0017] Preferably, a plurality of laminating grooves arranged at equal intervals are formed on the top of the rotating frame, and the bottom of the laminating frame is in sliding contact with the inner walls of the laminating grooves.

[0018] Furthermore, after the laminating frame is inserted into the laminating groove, the laminating frame can block the sliding frame from moving, and the sliding frame can block the pulling frame from rotating on the rotating frame, so that the rotating frame cannot rotate, and the pulling frame can continuously pull the positioning frame to release the positioning wheel.

[0019] The beneficial effects of the present invention are:

[0020] 1. Through the positioning mechanism, the positioning mechanism can position the position of the positioning wheel on the mounting frame at the left position, so that the positioning wheel cannot rotate, and the positioning wheel can position the baffle, and the baffle can continuously close or open the automatic power metering box;

[0021] 2. Through the control mechanism, the control mechanism is used to control the positioning mechanism on the left side of the left position mounting frame to continuously release the positioning wheel, so that the baffle can be continuously released, which is convenient for controlling the baffle to open or close the automatic power metering box;

[0022] 3. Through the unlocking mechanism, the unlocking mechanism is used to unlock the rack slide rail in the mobile housing, so that after the motor drives the gear to rotate, the gear can rotate on the rack slide rail, which can drive the mobile housing to move, and the mobile housing can drive the automatic power metering box to rise or fall, which is convenient for reading the meter of the automatic power metering box;

[0023] 4. Through the fitting mechanism, the fitting mechanism is used to position the rack slide rail in the mobile housing, so that the motor cannot drive the mobile housing and the automatic power metering box to move after driving the gear to rotate, so as to realize the positioning of the automatic power metering box, which greatly increases the stability of the automatic power metering box when in use;

[0024] The present invention starts the electric push rod first and then starts the motor, so that the motor can drive the movable housing and the automatic power metering box to move upward or downward, which is convenient for using the automatic power metering box. At the same time, when the automatic power metering box is not in use, the baffle can also protect the automatic power metering box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of an automated power metering box proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the front and cross-sectional view of the structure of an automated power metering box proposed by the present invention;

[0027] Figure 3 A schematic side view of the structure of an automated power metering box proposed by the present invention;

[0028] Figure 4 A schematic side view of a structural positioning wheel of an automated power metering box proposed by the present invention;

[0029] Figure 5 A three-dimensional schematic diagram of a structural baffle of an automated power metering box proposed by the present invention;

[0030] Figure 6 The invention provides an automatic power metering box. Figure 1 Middle A is an enlarged schematic diagram;

[0031] Figure 7 The invention provides an automatic power metering box. Figure 2 Middle B is an enlarged schematic diagram.

[0032] In the figure: 1. Automated power metering box; 2. Mounting frame; 3. Baffle; 4. Fixed block; 5. Positioning spring; 6. Positioning frame; 7. Positioning wheel; 8. Pulling frame; 9. Rotating frame; 10. Unlocking frame; 11. Fitting frame; 12. Reset spring; 13. Sliding frame; 14. Moving housing; 15. Rack slide rail; 16. Motor; 17. Gear; 18. Spring seat; 19. Compression spring; 20. Positioning rod; 21. Pulling rod; 22. Matching frame; 23. Electric push rod; 24. Rotating rod; 25. Fixed plate; 26. Auxiliary rod; 27. Positioning rack; 28. Docking block; 29. ​​Auxiliary spring. DETAILED DESCRIPTION

[0033] The present invention will be further explained below in conjunction with specific embodiments.

[0034] refer to Figure 1-7 In the present embodiment, an automatic power metering box is proposed, including an automatic power metering box 1, a mounting frame 2 is welded on the left and right sides of the automatic power metering box 1, and the sides of the two mounting frames 2 close to each other are rotatably connected to the same baffle 3 through a rotating shaft, a positioning wheel 7 is provided on the left side of the mounting frame 2 located at the left position, the positioning wheel 7 penetrates the mounting frame 2 at the left position, and the right side of the positioning wheel 7 is welded to the left side of the baffle 3, and a control mechanism and a positioning mechanism are respectively provided on the mounting frame 2 located at the left position, and the positioning mechanism cooperates with the positioning wheel 7 and the control mechanism respectively, a mobile shell 14 is welded on the rear side of the automatic power metering box 1, a rack slide 15 is slidably connected to the inner wall of the mobile shell 14 through a slide groove, a motor 16 is rotatably connected to the inner wall of the mobile shell 14 through a rotating shaft, a gear 17 is welded to the front end of the output shaft of the motor 16, the gear 17 is meshed with the rack slide 15, and an unlocking mechanism and a fitting mechanism are respectively provided in the mobile shell 14, and the fitting mechanism cooperates with the rack slide 15 and the unlocking mechanism respectively.

[0035] The positioning mechanism includes a fixed block 4, a positioning spring 5, a positioning frame 6, a pulling frame 8 and a rotating frame 9. The fixed block 4 is welded to the left side of the mounting frame 2 at the left position, the fixed block 4 is welded to the positioning spring 5, the positioning spring 5 is welded to the positioning frame 6, the positioning frame 6 is slidably connected to the left side of the mounting frame 2 at the left position through a slide groove, the positioning frame 6 cooperates with the positioning wheel 7, the pulling frame 8 is rotationally connected to the positioning frame 6 through a rotating shaft, the pulling frame 8 is rotationally connected to the rotating frame 9 through a rotating shaft, and the rotating frame 9 is rotationally connected to the left side of the mounting frame 2 at the left position through a rotating shaft. Through the positioning mechanism, the positioning mechanism can position the position of the positioning wheel 7 on the mounting frame 2 at the left position, so that the positioning wheel 7 cannot rotate, and the positioning wheel 7 can position the baffle 3, and the baffle 3 can continuously close or open the automatic power metering box 1.

[0036] The control mechanism includes an unlocking frame 10, a laminating frame 11, two return springs 12 and a sliding frame 13. The sliding frame 13 is slidably connected to the rotating frame 9 through a slide groove. The laminating frame 11 is slidably connected to the front side of the sliding frame 13 through a slide groove. The laminating frame 11 is welded to the return spring 12, and the return spring 12 is welded to the sliding frame 13. The unlocking frame 10 is slidably connected to the front side of the rotating frame 9 through a slide groove. The unlocking frame 10 is welded to the laminating frame 11, and the sliding frame 13 is slidably connected to the pulling frame 8 through a slide groove. Through the control mechanism, the control mechanism is used to control the positioning mechanism on the left side of the left position mounting frame 2 to continuously release the positioning wheel 7, so that the baffle 3 can be continuously released, which is convenient for controlling the baffle 3 to open or close the automated power metering box 1.

[0037] The unlocking mechanism includes a spring seat 18, a compression spring 19, a positioning rod 20, a pulling rod 21, a matching frame 22 and an electric push rod 23. The spring seat 18 is welded to the inner wall of the mobile housing 14, the spring seat 18 is welded to the compression spring 19, the compression spring 19 is welded to the positioning rod 20, the positioning rod 20 is rotatably connected to the pulling rod 21 through a rotating shaft, the pulling rod 21 is rotatably connected to the matching frame 22 through a rotating shaft, the matching frame 22 is slidably connected to the inner wall of the mobile housing 14 through a slide groove, the matching frame 22 cooperates with the electric push rod 23, and the unlocking mechanism is used to unlock the rack slide 15 in the mobile housing 14, so that after the motor 16 drives the gear 17 to rotate, the gear 17 can rotate on the rack slide 15, which can drive the mobile housing 14 to move, and the mobile housing 14 can drive the automatic power metering box 1 to rise or fall, which is convenient for reading the automatic power metering box 1.

[0038] The fitting mechanism includes a rotating rod 24, a fixed plate 25, an auxiliary rod 26, a positioning rack 27, a docking block 28 and an auxiliary spring 29. The rotating rod 24 is rotatably connected to the inner wall of the mobile housing 14 through a rotating shaft, the rotating rod 24 and the auxiliary rod 26 are rotatably connected through a rotating shaft, the auxiliary rod 26 and the positioning rack 27 are rotatably connected through a rotating shaft, the positioning rack 27 is slidably connected to the inner wall of the mobile housing 14 through a sliding groove, the positioning rack 27 is welded to the auxiliary spring 29, the auxiliary spring 29 is welded to the fixed plate 25, the fixed plate 25 is welded to the inner wall of the mobile housing 14, the positioning rack 27 is meshed with the rack slide 15, and a fitting groove is provided at the bottom of the docking block 28. Through the fitting mechanism, the fitting mechanism is used to position the rack slide 15 in the mobile housing 14, so that the motor 16 cannot drive the mobile housing 14 and the automatic power metering box 1 to move after driving the gear 17 to rotate, so that the positioning of the automatic power metering box 1 can be achieved, which greatly increases the stability of the automatic power metering box 1 when in use.

[0039] The positioning wheel 7 is provided with a plurality of positioning grooves arranged at equal intervals, and the top end of the positioning frame 6 is in sliding contact with the inner wall of the positioning groove. After the positioning frame 6 is inserted into the positioning groove, the positioning frame 6 can block the rotation of the positioning wheel 7, thereby blocking the rotation of the baffle 3, and realizing the positioning of the baffle 3.

[0040] A triangular block is welded on the top of the positioning rod 20, and the outer side of the triangular block is in sliding contact with the inner wall of the fitting groove. After the triangular block is inserted into the fitting groove, the triangular block can block the movement of the docking block 28, thereby realizing the positioning of the positioning rack 27, so that the positioning rack 27 can continuously and stably position the automated power metering box 1 in the mobile housing 14.

[0041] The top of the rotating frame 9 is provided with a plurality of bonding grooves arranged at equal intervals, and the bottom of the bonding frame 11 is in sliding contact with the inner wall of the bonding groove. After the bonding frame 11 is inserted into the bonding groove, the bonding frame 11 can block the sliding frame 13 from moving, and the sliding frame 13 can block the pulling frame 8 from rotating on the rotating frame 9, so that the rotating frame 9 cannot rotate, and the pulling frame 8 can continuously pull the positioning frame 6 to release the positioning wheel 7.

[0042] Working principle: When the automated power metering box 1 is needed, it is only necessary to start the electric push rod 23 first, and the electric push rod 23 pushes the matching frame 22 to move to the right, and the matching frame 22 pulls the pulling rod 21, and the pulling rod 21 first pulls the positioning rod 20 to move downward and compresses the compression spring 19, and then the positioning rod 20 is disengaged from the docking block 28, and the docking block 28 and the positioning rack 27 are unlocked, and then the electric push rod 23 continues to extend, and the electric push rod 23 can push the rotating rod 24 to rotate, and the rotating rod 24 can rotate clockwise, and the rotating rod 24 can pull the auxiliary rod 26 to move to the left, and the auxiliary rod 26 then pulls the positioning rack 27 to disengage from the rack slide 15 and compress the auxiliary spring 29, and at this time, the position of the mobile housing 14 and the automated power metering box 1 can be adjusted. Unlock, and then start the motor 16, the motor 16 drives the gear 17 to rotate, the gear 17 can rotate on the rack slide 15, to drive the mobile housing 14 and the automatic power metering box 1 to move, so that the automatic power metering box 1 moves in front of the staff, the staff does not need to work at height, and the occurrence of dangerous situations is reduced, and then stop the motor 16, and retract the electric push rod 23, the electric push rod 23 releases the positioning rack 27, the positioning rack 27 is reset by the rebound of the auxiliary spring 29, so that the positioning rack 27 is engaged with the rack slide 15, and then the positioning rack 27 drives the docking block 28 to move to the left, and the docking block 28 will first slide on the hypotenuse of the triangular block at the top of the positioning rod 20 and press the positioning rod 20 and the triangular block downward, and the triangular block is aligned with the positioning rod 20. After the fitting groove on the aligning docking block 28 is aligned, the compression spring 19 will push the triangular block into the fitting groove. After the triangular block is inserted into the fitting groove, the triangular block can prevent the docking block 28 from moving, so that the positioning rack 27 can be positioned, so that the positioning rack 27 can continuously and stably position the automatic power metering box 1 in the mobile shell 14, greatly increasing the stability of the automatic power metering box 1 when in use. When it is necessary to protect the automatic power metering box 1, first hold the rotating frame 9 on the left position mounting frame 2 and press the unlocking frame 10, so that the unlocking frame 10 pushes the fitting frame 11 upward, so that the fitting frame 11 is disengaged from the rotating frame 9 and the reset spring 12 is compressed to unlock the sliding frame 13, and then the pulling frame 8 can be rotated at the front side of the rotating frame 9 The swivel frame 9 is moved, and then the swivel frame 9 is rotated counterclockwise, the swivel frame 9 will move the positioning frame 6 downward and compress the positioning spring 5, and then release the fitting frame 11, so that the fitting frame 11 is inserted into the fitting groove on the swivel frame 9 through the rebound of the reset spring 12. After the fitting frame 11 is inserted into the fitting groove, the fitting frame 11 can block the sliding frame 13 from moving, and the sliding frame 13 can block the pulling frame 8 from rotating on the swivel frame 9, so that the swivel frame 9 cannot rotate, and the pulling frame 8 can continuously pull the positioning frame 6 to release the positioning wheel 7. At this time, the positioning wheel 7 and the baffle 3 can be unlocked, and then the baffle 3 is rotated again. The baffle 3 can fit with the front side of the automatic power metering box 1 to protect the automatic power metering box 1, and then the unlocking frame 10 is pressed and the swivel frame 9 is rotated clockwise.The rotating frame 9 can push the pulling frame 8, and the pulling frame 8 can push the positioning frame 6 to be inserted into the positioning groove on the positioning wheel 7. After the positioning frame 6 is inserted into the positioning groove, the positioning frame 6 can block the rotation of the positioning wheel 7, thereby blocking the rotation of the baffle 3, thereby achieving the positioning of the baffle 3 and increasing the stability of the baffle 3 when in use.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automated power metering box, comprising an automated power metering box (1), characterized in that: The left and right sides of the automatic power metering box (1) are both fixedly mounted with mounting frames (2); the sides of the two mounting frames (2) close to each other are rotatably connected to the same baffle (3); a positioning wheel (7) is provided on the left side of the mounting frame (2) located on the left side; the positioning wheel (7) passes through the mounting frame (2) located on the left side, and the right side of the positioning wheel (7) is fixedly connected to the left side of the baffle (3); a control mechanism and a positioning mechanism are respectively provided on the mounting frame (2) located on the left side, and the positioning mechanism cooperates with the positioning wheel (7) and the control mechanism respectively. A movable housing (14) is fixedly mounted on the rear side of the automated power metering box (1), a rack rail (15) is slidably connected to the inner wall of the movable housing (14), a motor (16) is rotatably connected to the inner wall of the movable housing (14), a gear (17) is fixedly mounted on the front end of the output shaft of the motor (16), the gear (17) meshes with the rack rail (15), an unlocking mechanism and a fitting mechanism are respectively provided in the movable housing (14), the fitting mechanisms respectively cooperate with the rack rail (15) and the unlocking mechanism; The positioning mechanism comprises a fixed block (4), a positioning spring (5), a positioning frame (6), a pulling frame (8) and a rotating frame (9); the fixed block (4) is fixedly mounted on the left side of the mounting frame (2) at the left position; the fixed block (4) is fixedly connected to the positioning spring (5); the positioning spring (5) is fixedly connected to the positioning frame (6); the positioning frame (6) is slidably connected to the left side of the mounting frame (2) at the left position; the positioning frame (6) cooperates with the positioning wheel (7); the pulling frame (8) is rotationally connected to the positioning frame (6); the pulling frame (8) is rotationally connected to the rotating frame (9); and the rotating frame (9) is rotationally connected to the left side of the mounting frame (2) at the left position; The control mechanism comprises an unlocking frame (10), a laminating frame (11), two return springs (12) and a sliding frame (13); the sliding frame (13) is slidably connected to the rotating frame (9); the laminating frame (11) is slidably connected to the front side of the sliding frame (13); the laminating frame (11) is fixedly connected to the return spring (12); the return spring (12) is fixedly connected to the sliding frame (13); the unlocking frame (10) is slidably connected to the front side of the rotating frame (9); the unlocking frame (10) is fixedly connected to the laminating frame (11); and the sliding frame (13) is slidably connected to the pulling frame (8); The unlocking mechanism comprises a spring seat (18), a compression spring (19), a positioning rod (20), a pulling rod (21), a matching frame (22) and an electric push rod (23); the spring seat (18) is fixedly mounted on the inner wall of the movable housing (14); the spring seat (18) is fixedly connected to the compression spring (19); the compression spring (19) is fixedly connected to the positioning rod (20); the positioning rod (20) is rotationally connected to the pulling rod (21); the pulling rod (21) is rotationally connected to the matching frame (22); the matching frame (22) is slidably connected to the inner wall of the movable housing (14); and the matching frame (22) matches the electric push rod (23); The fitting mechanism comprises a rotating rod (24), a fixed plate (25), an auxiliary rod (26), a positioning rack (27), a docking block (28) and an auxiliary spring (29); the rotating rod (24) is rotatably connected to the inner wall of the movable housing (14); the rotating rod (24) is rotatably connected to the auxiliary rod (26); the auxiliary rod (26) is rotatably connected to the positioning rack (27); the positioning rack (27) is slidably connected to the inner wall of the movable housing (14); the positioning rack (27) is fixedly connected to the auxiliary spring (29); the auxiliary spring (29) is fixedly connected to the fixed plate (25); the fixed plate (25) is fixedly mounted on the inner wall of the movable housing (14); the positioning rack (27) is meshed with the rack slide rail (15); and a fitting groove is provided at the bottom of the docking block (28); The positioning wheel (7) is provided with a plurality of positioning grooves arranged at equal intervals, and the top end of the positioning frame (6) is in sliding contact with the inner wall of the positioning groove; A triangular block is fixedly mounted on the top of the positioning rod (20), and the outer side of the triangular block is in sliding contact with the inner wall of the fitting groove; The top of the rotating frame (9) is provided with a plurality of laminating grooves arranged at equal intervals, and the bottom of the laminating frame (11) is in sliding contact with the inner wall of the laminating groove.

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