Winding machine clamping mechanism for eddy current sensor framework production

Abstract

The invention belongs to the technical field of winding machines, and discloses a winding machine clamping mechanism for eddy current sensor framework production, the winding machine clamping mechanism comprises a base, a mounting plate is movably mounted at the top end of the base, a fixed box is fixedly mounted on the left side of the bottom end of the mounting plate, and the outer surface of the fixed box is movably connected with the inner surface of the left end of the base in a sleeving manner. By arranging the T-shaped block, the pneumatic cylinder, the circular plate, the inclined rod and the cylinder, when the pneumatic cylinder is started, the circular plate moves downwards along the outer surface of the cylinder, and the upper end and the lower end of the inclined rod are hinged to the T-shaped block and the circular plate correspondingly, so that the circular plate moves downwards along with movement of the circular plate; the three T-shaped blocks drive the first supporting column and the second supporting column to move along the inner surfaces of the sliding grooves under the action of the inclined rods correspondingly, so that the positions of the first supporting column and the second supporting column can be adjusted, the winding machine can clamp winding coils of different specifications, and then the application range of the winding machine is widened.

Description

Technical Field

[0001] The invention belongs to the technical field of winding machines, in particular to a winding machine clamping mechanism used for producing an eddy current sensor skeleton. Background Art

[0002] A winding machine is a device that winds linear objects onto a specific workpiece. Most electrical products need to be wound into inductor coils with enameled copper wire. A winding machine can be used to complete one or more processes. There are many types of winding machines, which can be divided into general-purpose and special-purpose types according to their uses. The general-purpose type is suitable for winding machines for a variety of products. As long as the corresponding molds and instructions are replaced, it can correspond to the processing of different products. The special-purpose type is a winding machine for a specific product.

[0003] In the process of producing the eddy current sensor skeleton, a corresponding winding machine is required to perform the winding operation on the coil. The existing winding machine mainly realizes the winding by passing a ring with a wire drum through the coil and rotating it at a constant speed. However, in actual use, the clamping mechanism on the mounting plate of the winding machine mostly adopts a fixed design, so that the winding machine can only clamp the coil of corresponding specifications, thereby limiting the use scope and practicality of the winding machine, so it is necessary to improve this. Summary of the invention

[0004] The object of the present invention is to provide a winding machine clamping mechanism for producing an eddy current sensor skeleton to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a winding machine clamping mechanism for the production of eddy current sensor skeletons, comprising a base, a mounting plate movably installed on the top of the base, a fixing box fixedly installed on the left side of the bottom end of the mounting plate, the outer surface of the fixing box and the inner surface of the left end of the base are movably sleeved, a slide groove is opened on the left side of the top of the mounting plate, the number of the slide grooves is three, the outward sides of the inside of the three slide grooves are respectively movably sleeved with T-blocks, the number of the T-blocks is three, and the tops of the three T-blocks are respectively fixedly installed with a first support column and a first support column located at the first support A second supporting column on the right side of the column, the number of the second supporting columns is two and the shape and size are the same, the bottom ends of the first supporting column and the second supporting column are movably connected to the top of the mounting plate, a pneumatic cylinder is fixedly installed on the bottom end of the interior of the fixed box, a circular plate is fixedly sleeved on the top of the outer surface of the pneumatic cylinder, an inclined rod is hinged on the top of the circular plate, the number of the inclined rods is three, and the other ends of the three inclined rods are respectively hinged to the bottom ends of three T-blocks, a cylinder is fixedly installed on the right side of the bottom end of the interior of the fixed box, the top end of the cylinder passes through the circular plate and extends to the outside of the circular plate and is fixedly installed with a baffle.

[0006] As a preferred embodiment of the present invention, a driving motor is fixedly installed at the bottom end inside the first support column, the other end of the output shaft of the driving motor is fixedly sleeved with a driving shaft, the outer surface of the driving shaft is fixedly sleeved with a first round wheel, and the bottom end of the first round wheel is movably connected to the top end of the first support column.

[0007] As a preferred embodiment of the present invention, a threaded rod is fixedly installed in the middle part of the top of each of the two second support columns, a second round wheel is movably sleeved on the bottom of the outer surface of the threaded rod, the bottom end of the second round wheel is movably connected to the top of the second support column, a round block is fixedly sleeved on the outer surface of the threaded rod, and the bottom end of the round block is movably connected to the top of the second round wheel.

[0008] As a preferred embodiment of the present invention, an extension plate is movably sleeved on the outer surface of the threaded rod, and the bottom end of the extension plate is movably connected to the top of the round block, a fixing frame is fixedly installed on the left side of the bottom end of the extension plate, a round shaft is fixedly sleeved on the bottom end inside the fixing frame, a lower pressure wheel is movably sleeved on the outer surface of the round shaft, and the outer surface of the lower pressure wheel is movably sleeved on the inner surface of the fixing frame.

[0009] As a preferred embodiment of the present invention, the top threaded sleeve of the outer surface of the threaded rod is provided with a pressure-adjusting nut, the bottom end of the pressure-adjusting nut is movably connected with an adjusting plate, the inner surface of the adjusting plate and the outer surface of the threaded rod are movably sleeved, the bottom end of the adjusting plate is fixedly provided with a spring located outside the threaded rod, and the other end of the spring is fixedly connected to the top end of the extension plate.

[0010] As a preferred embodiment of the present invention, a fixing block is fixedly installed on the right end of the round block, a limiting rod is fixedly installed on the top end of the fixing block, and the top end of the limiting rod passes through the extension plate and the adjustment plate and extends to the outside of the adjustment plate.

[0011] As a preferred embodiment of the present invention, a power motor is fixedly installed at the bottom of the right end of the base, and a lead screw is fixedly sleeved on the other end of the output shaft of the power motor, and the left end of the lead screw passes through the base and extends to the interior of the base.

[0012] As a preferred embodiment of the present invention, a movable block is threadedly sleeved on the right side of the outer surface of the screw, the outer surface of the movable block and the bottom movably sleeved on the inner surface of the base, the top end of the movable block is hinged with a connecting rod, and the other end of the connecting rod is hinged to the bottom end of the mounting plate.

[0013] As a preferred embodiment of the present invention, rectangular plates are movably sleeved on the bottom of the left and right ends of the base, and a limiting column is fixedly installed on the top of the rectangular plate. The other end of the limiting column passes through the base and extends to the outside of the base and is fixedly connected to the bottom end of the mounting plate.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention arranges a T-block, a pneumatic cylinder, a circular plate, an inclined rod and a cylinder. When the pneumatic cylinder is started, the circular plate will move downward along the outer surface of the cylinder. Since the upper and lower ends of the inclined rod are respectively hinged to the T-block and the circular plate, as the circular plate moves, the three T-blocks will respectively carry the first support column and the second support column to move along the inner surface of the slide groove under the action of the inclined rod, thereby realizing the adjustment of the positions of the first support column and the second support column, so that the winding machine can clamp winding coils of different specifications, thereby improving its scope of application.

[0016] 2. The present invention provides an extension plate, a lower pressure wheel, a pressure-adjusting nut, an adjustment plate and a spring. When the pressure-adjusting nut is rotated, the adjustment plate will move toward the extension plate and continuously compress the spring. At this time, the spring in a compressed state will generate a downward thrust on the extension plate under its own restoring action, pushing the extension plate to move along the outer surface of the threaded rod with the fixing frame, the round shaft and the lower pressure wheel, thereby assisting in tightening the winding coil through the lower pressure wheel, thereby preventing the winding coil from falling off during rotation, and improving the stability of the rotation of the winding coil.

[0017] 3. The present invention sets a limit column, a power motor, a lead screw, a movable block and a connecting rod. When the power motor is started, the lead screw will rotate. Since the outer surface of the lead screw and the inner surface of the movable block are threadedly connected, the movable block will move with the connecting rod as the lead screw rotates, so that the other end of the connecting rod generates a thrust on the bottom end of the mounting plate, pushing the mounting plate to move upward along the inner surface of the base with the limit column and the rectangular plate, thereby realizing the adjustment of the height of the winding machine clamping mechanism, thereby facilitating the use of operators of different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structural diagram of the front side of the present invention;

[0020] Figure 3 It is a schematic cross-sectional structural diagram of the bottom of the mounting plate of the present invention;

[0021] Figure 4 It is a schematic cross-sectional structural diagram of the top of the base of the present invention;

[0022] Figure 5 It is a schematic cross-sectional structural diagram of the side surface of the second supporting column of the present invention;

[0023] Figure 6 It is a schematic cross-sectional structure diagram of the limiting column of the present invention;

[0024] Figure 7 for Figure 5 Schematic diagram of the local enlarged structure at point A in the middle.

[0025] In the figure: 1. base; 2. mounting plate; 3. fixing box; 4. slide; 5. T-block; 6. first supporting column; 7. second supporting column; 8. pneumatic cylinder; 9. limiting column; 10. round plate; 11. inclined rod; 12. cylinder; 13. baffle; 14. driving motor; 15. driving shaft; 16. first round wheel; 17. threaded rod; 18. second round wheel; 19. round block; 20. extension plate; 21. fixing frame; 22. round shaft; 23. lower pressure wheel; 24. pressure regulating nut; 25. adjusting plate; 26. spring; 27. fixing block; 28. limiting rod; 29. ​​power motor; 30. lead screw; 31. movable block; 32. connecting rod; 33. rectangular plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 7 As shown, the embodiment of the present invention provides a winding machine clamping mechanism for the production of eddy current sensor skeletons, including a base 1, a mounting plate 2 is movably installed on the top of the base 1, a fixing box 3 is fixedly installed on the left side of the bottom end of the mounting plate 2, the outer surface of the fixing box 3 and the inner surface of the left end of the base 1 are movably sleeved, a slide groove 4 is opened on the left side of the top of the mounting plate 2, the number of the slide grooves 4 is three, and the outward sides of the three slide grooves 4 are movably sleeved with T-blocks 5 respectively, the number of the T-blocks 5 is three, and the tops of the three T-blocks 5 are respectively fixedly installed with a first support column 6 and a second support column 7 located on the right side of the first support column 6, There are two second support columns 7 with the same shape and size. The bottom ends of the first support column 6 and the second support column 7 are movably connected to the top of the mounting plate 2. A pneumatic cylinder 8 is fixedly installed at the bottom end of the interior of the fixed box 3. A circular plate 10 is fixedly sleeved on the top of the outer surface of the pneumatic cylinder 8. An inclined rod 11 is hinged on the top of the circular plate 10. There are three inclined rods 11. The other ends of the three inclined rods 11 are respectively hinged to the bottom ends of the three T-blocks 5. A cylinder 12 is fixedly installed on the right side of the bottom end of the interior of the fixed box 3. The top end of the cylinder 12 penetrates the circular plate 10 and extends to the outside of the circular plate 10 and is fixedly installed with a baffle 13.

[0028] When the pneumatic cylinder 8 is started, the circular plate 10 fixedly connected to the pneumatic cylinder 8 will move downward along the outer surface of the cylinder 12 with the bottom end of the inclined rod 11. Since the other end of the inclined rod 11 is hinged to the bottom end of the T-block 5, as the inclined rod 11 moves, the top end of the inclined rod 11 will generate a pulling force on the bottom end of the T-block 5, pulling the three T-blocks 5 to move along the inner surface of the slide groove 4 with the first support column 6 and the two second support columns 7 respectively, thereby realizing the adjustment of the clamping range of the winding machine clamping mechanism, so that winding coils of different specifications can be clamped.

[0029] Among them, a driving motor 14 is fixedly installed at the bottom end of the first support column 6, and a driving shaft 15 is fixedly sleeved on the other end of the output shaft of the driving motor 14. A first circular wheel 16 is fixedly sleeved on the outer surface of the driving shaft 15, and the bottom end of the first circular wheel 16 is movably connected to the top end of the first support column 6.

[0030] When the driving motor 14 is started, the driving shaft 15 will rotate, so that the first round wheel 16 will rotate along the top of the first supporting column 6 .

[0031] Among them, a threaded rod 17 is fixedly installed in the middle of the top of the two second support columns 7, and a second round wheel 18 is movably sleeved on the bottom of the outer surface of the threaded rod 17. The bottom end of the second round wheel 18 is movably connected to the top of the second support column 7. A round block 19 is fixedly sleeved on the outer surface of the threaded rod 17, and the bottom end of the round block 19 is movably connected to the top of the second round wheel 18.

[0032] The inner surface of the second circular wheel 18 is smooth, thereby ensuring that the second circular wheel 18 will not get stuck when rotating along the outer surface of the threaded rod 17, and the existence of the round block 19 can prevent the position of the second circular wheel 18 from being offset.

[0033] Among them, the outer surface of the threaded rod 17 is movably sleeved with an extension plate 20, the bottom end of the extension plate 20 is movably connected to the top of the round block 19, a fixing frame 21 is fixedly installed on the left side of the bottom end of the extension plate 20, a round shaft 22 is fixedly sleeved at the bottom end inside the fixing frame 21, and a lower pressure wheel 23 is movably sleeved on the outer surface of the round shaft 22, and the outer surface of the lower pressure wheel 23 is movably sleeved with the inner surface of the fixing frame 21.

[0034] Due to the presence of the extension plate 20, the round shaft 22 and the lower pressing wheel 23, the winding coil will be pressed assistedly when it rotates, thereby preventing the winding coil from falling off.

[0035] Among them, the top threaded sleeve of the outer surface of the threaded rod 17 is threaded with a pressure-adjusting nut 24, and the bottom end of the pressure-adjusting nut 24 is movably connected with an adjusting plate 25. The inner surface of the adjusting plate 25 and the outer surface of the threaded rod 17 are movably sleeved, and the bottom end of the adjusting plate 25 is fixedly installed with a spring 26 located outside the threaded rod 17, and the other end of the spring 26 is fixedly connected to the top end of the extension plate 20.

[0036] The spring 26 is in a compressed state. Due to the restoring effect of the spring 26, the extension plate 20 will move and then return to its original position. By rotating the pressure-adjusting nut 24, the adjustment plate 25 can be moved downward along the outer surface of the threaded rod 17, thereby adjusting the elastic force of the spring 26.

[0037] A fixing block 27 is fixedly mounted on the right end of the circular block 19 , a limiting rod 28 is fixedly mounted on the top of the fixing block 27 , and the top of the limiting rod 28 penetrates the extension plate 20 and the adjustment plate 25 and extends to the outside of the adjustment plate 25 .

[0038] The cooperation between the fixing block 27 and the limiting rod 28 will limit the movement of the extension plate 20 and the adjustment plate 25 , and prevent the extension plate 20 and the adjustment plate 25 from rotating when they move up and down along the outer surface of the threaded rod 17 .

[0039] A power motor 29 is fixedly mounted at the bottom of the right end of the base 1 , a lead screw 30 is fixedly sleeved at the other end of the output shaft of the power motor 29 , and the left end of the lead screw 30 passes through the base 1 and extends to the inside of the base 1 .

[0040] When the power motor 29 is started, the lead screw 30 will rotate along the inner surface of the base 1 .

[0041] Among them, the right side threaded sleeve of the outer surface of the screw 30 is connected with a movable block 31, the outer surface of the movable block 31 is movably sleeved with the bottom of the inner surface of the base 1, the top of the movable block 31 is hinged with a connecting rod 32, and the other end of the connecting rod 32 is hinged with the bottom end of the mounting plate 2.

[0042] When the lead screw 30 rotates, the movable block 31 threadedly connected to the lead screw 30 will move along the bottom of the inner surface of the base 1 with the bottom end of the connecting rod 32, so that the other end of the connecting rod 32 generates a thrust on the mounting plate 2, pushing the mounting plate 2 to move upward with the fixed box 3.

[0043] Among them, rectangular plates 33 are movably sleeved at the bottom of the left and right ends of the base 1, and a limiting column 9 is fixedly installed on the top of the rectangular plate 33. The other end of the limiting column 9 penetrates the base 1 and extends to the outside of the base 1 and is fixedly connected to the bottom end of the mounting plate 2.

[0044] The presence of the rectangular plate 33 and the limiting column 9 will limit the movement of the mounting plate 2, thereby ensuring the stability of the mounting plate 2 when being lifted or lowered.

[0045] Working principle and usage process:

[0046] First, the operator places the winding coil between the first circular wheel 16 and the two second circular wheels 18, and then starts the pneumatic cylinder 8, so that the circular plate 10 moves downward along the outer surface of the cylinder 12 with the bottom end of the inclined rod 11, so that the top end of the inclined rod 11 generates a pulling force on the T-block 5, pulling the three T-blocks 5 to move toward each other along the inner surface of the slide groove 4 with the first support column 6 and the two second support columns 7 respectively, until the outer surfaces of the first circular wheel 16 and the second circular wheel 18 fit with the outer surface of the winding coil, thereby clamping the winding coil. With the mutual cooperation of various mechanisms, the clamping of winding coils of different specifications is realized, thereby increasing its scope of use.

[0047] The operator then rotates the pressure-adjusting nut 24 according to actual conditions. Since the inner surface of the pressure-adjusting nut 24 is threadedly sleeved with the outer surface of the threaded rod 17, the pressure-adjusting nut 24 will move downward at this time, thereby generating a thrust on the adjusting plate 25, pushing the adjusting plate 25 downward and continuously compressing the spring 26, thereby adjusting the elastic force of the spring 26. At this time, since the lower pressure wheel 23 is in contact with the top of the winding coil, the lower pressure wheel 23 will make the extension plate 20 move upward along the outer surface of the threaded rod 17 through the fixing frame 21 and the round shaft 22, and under the restoring action of the spring 26, the extension plate 20 will be forced to return to its original position with the lower pressure wheel 23, so that the winding coil can be assisted by the lower pressure wheel 23 to tighten, thereby preventing the winding coil from falling off during the rotation process, thereby improving the stability of the rotation of the winding coil. Finally, the operator starts the drive motor 14, so that the drive shaft 15 rotates with the first round wheel 16. Under the joint action of the first round wheel 16 and the two second round wheels 18, the winding coil will rotate, and then the winding operation can be started.

[0048] When the operator is clamping the coil, if the height of the mounting plate 2 is too low and it is inconvenient for the operator to operate, the operator starts the power motor 29 to rotate the lead screw 30, so that the movable block 31 threadedly sleeved on the outer surface of the lead screw 30 moves with the bottom end of the connecting rod 32, and then the top end of the connecting rod 32 generates a thrust on the bottom end of the mounting plate 2, pushing the mounting plate 2 to move upward with the fixed box 3, so that the height of the mounting plate 2 can be adjusted, thereby facilitating the use of operators of different heights, thereby improving its convenience of use.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winding machine clamping mechanism for producing an eddy current sensor skeleton, comprising a base (1), characterized in that: A mounting plate (2) is movably mounted on the top of the base (1), a fixed box (3) is fixedly mounted on the left side of the bottom end of the mounting plate (2), the outer surface of the fixed box (3) and the inner surface of the left end of the base (1) are movably sleeved, a slide groove (4) is provided on the left side of the top of the mounting plate (2), the number of the slide grooves (4) is three, the outward sides of the inside of the three slide grooves (4) are movably sleeved with T-shaped blocks (5), the number of the T-shaped blocks (5) is three, the tops of the three T-shaped blocks (5) are respectively fixedly mounted with a first support column (6) and a second support column (7) located on the right side of the first support column (6), the number of the second support column (7) is two and the shapes and sizes are the same The bottom ends of the first support column (6) and the second support column (7) are both movably connected to the top end of the mounting plate (2); a pneumatic cylinder (8) is fixedly installed at the bottom end of the fixed box (3); a circular plate (10) is fixedly sleeved on the top of the outer surface of the pneumatic cylinder (8); an inclined rod (11) is hingedly connected to the top end of the circular plate (10); there are three inclined rods (11); the other ends of the three inclined rods (11) are respectively hingedly connected to the bottom ends of three T-blocks (5); a cylinder (12) is fixedly installed on the right side of the bottom end of the fixed box (3); the top end of the cylinder (12) passes through the circular plate (10) and extends to the outside of the circular plate (10) and is fixedly installed with a baffle (13).

2. The winding machine clamping mechanism for producing eddy current sensor skeleton according to claim 1 is characterized in that: A driving motor (14) is fixedly mounted at the bottom end of the first supporting column (6); a driving shaft (15) is fixedly sleeved on the other end of the output shaft of the driving motor (14); a first round wheel (16) is fixedly sleeved on the outer surface of the driving shaft (15); and the bottom end of the first round wheel (16) is movably connected to the top end of the first supporting column (6).

3. The winding machine clamping mechanism for producing eddy current sensor skeleton according to claim 1 is characterized in that: A threaded rod (17) is fixedly mounted in the middle of the top of each of the two second support columns (7); a second round wheel (18) is movably sleeved on the bottom of the outer surface of the threaded rod (17); the bottom end of the second round wheel (18) is movably connected to the top of the second support column (7); a round block (19) is fixedly sleeved on the outer surface of the threaded rod (17); the bottom end of the round block (19) is movably connected to the top of the second round wheel (18).

4. The winding machine clamping mechanism for producing eddy current sensor skeletons according to claim 3 is characterized in that: The outer surface of the threaded rod (17) is movably sleeved with an extension plate (20), the bottom end of the extension plate (20) is movably connected to the top end of the round block (19), a fixing frame (21) is fixedly installed on the left side of the bottom end of the extension plate (20), a round shaft (22) is fixedly sleeved at the bottom end inside the fixing frame (21), a lower pressure wheel (23) is movably sleeved on the outer surface of the round shaft (22), and the outer surface of the lower pressure wheel (23) is movably sleeved with the inner surface of the fixing frame (21).

5. The winding machine clamping mechanism for producing eddy current sensor skeletons according to claim 3 is characterized in that: The top threaded sleeve of the outer surface of the threaded rod (17) is threadedly sleeved with a pressure-adjusting nut (24); the bottom end of the pressure-adjusting nut (24) is movably connected with an adjusting plate (25); the inner surface of the adjusting plate (25) is movably sleeved with the outer surface of the threaded rod (17); the bottom end of the adjusting plate (25) is fixedly mounted with a spring (26) located outside the threaded rod (17); the other end of the spring (26) is fixedly connected to the top end of the extension plate (20).

6. The winding machine clamping mechanism for producing eddy current sensor skeleton according to claim 3 is characterized in that: A fixing block (27) is fixedly mounted on the right end of the circular block (19), a limiting rod (28) is fixedly mounted on the top end of the fixing block (27), and the top end of the limiting rod (28) penetrates the extension plate (20) and the adjustment plate (25) and extends to the outside of the adjustment plate (25).

7. The winding machine clamping mechanism for producing eddy current sensor skeleton according to claim 1 is characterized in that: A power motor (29) is fixedly mounted at the bottom of the right end of the base (1); a lead screw (30) is fixedly sleeved at the other end of the output shaft of the power motor (29); the left end of the lead screw (30) passes through the base (1) and extends into the interior of the base (1).

8. The winding machine clamping mechanism for producing eddy current sensor skeletons according to claim 7 is characterized in that: A movable block (31) is threadedly sleeved on the right side of the outer surface of the lead screw (30), the outer surface of the movable block (31) is movably sleeved on the bottom of the inner surface of the base (1), the top end of the movable block (31) is hingedly connected to a connecting rod (32), and the other end of the connecting rod (32) is hingedly connected to the bottom end of the mounting plate (2).

9. The winding machine clamping mechanism for producing eddy current sensor skeletons according to claim 1, characterized in that: A rectangular plate (33) is movably sleeved on the bottom of the left and right ends of the base (1), and a limiting column (9) is fixedly installed on the top of the rectangular plate (33). The other end of the limiting column (9) passes through the base (1) and extends to the outside of the base (1) and is fixedly connected to the bottom end of the mounting plate (2).

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