Winding device for erecting insulated cable

Abstract

The utility model relates to the technical field of insulated cable erection, and discloses a winding device for insulated cable erection, which comprises a winding table, a winding mechanism, a pressing mechanism, a transmission mechanism, a guide mechanism and a positioning mechanism, the winding mechanism is positioned in an inner cavity of the winding table, the pressing mechanism is positioned at the top of the winding mechanism, and the transmission mechanism is positioned in the inner cavity of the winding table. The transmission mechanism is located on the rear side of the top of the winding table, and the guide mechanism is located on the front side of the winding table. The problems that in the erecting process of an insulated cable, the insulated cable needs to be wound through a winding device, but in the winding process of the insulated cable, the winding device does not have an assembly capable of pressing and limiting an insulated cable bundle, so that the insulated cable bundle is prone to scattering after winding is completed, and the cable bundle cannot be wound easily are solved. And after the insulated cable bundle is scattered, knotting is easily caused in the winding process, so that the winding stability of the insulated cable bundle is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of insulating cable installation, in particular to a winding device for insulating cable installation. Background Art

[0002] Insulated cable is a cable used to transmit electricity. Its characteristic is that a layer of insulating material is wrapped around the conductor to prevent the current from generating electromagnetic interference or leakage outside the cable. Insulated cable is mainly composed of conductor, insulation layer, sheath, etc., which can effectively protect the safety inside and outside the cable. Insulated cable is widely used in construction, communication, electricity and other fields, and is an indispensable power transmission tool in modern society.

[0003] The winding device for insulated cable erection is a device for cable winding. It usually consists of a frame, a winding shaft and a winding device. The winding device usually consists of one or more winding wheels, which are used to wind the cable around the winding shaft. The winding device can be adjusted as needed to ensure that the cable is properly wound around the winding shaft, thereby ensuring that the cable will not be damaged during the erection process. The winding device can also be adjusted according to the size and shape of the cable to ensure that the cable is properly wound around the winding shaft. The design and material selection of the winding device also need to meet the special requirements of the insulated cable, such as preventing the cable from being scratched or otherwise damaged. The problem with the above technology is that during the erection process of the insulated cable, the insulated cable needs to be wound by the winding device, but during the winding process of the insulated cable, the winding device does not have a component that can suppress and limit the insulated cable bundle. Therefore, after the winding is completed, the insulated cable bundle is easy to scatter, and after the insulated cable bundle is scattered, it is easy to cause the problem of knotting in the winding process, thereby reducing the winding stability of the insulated cable bundle. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a winding device for installing an insulated cable, which can overcome the above problems or at least partially solve the above problems.

[0005] The utility model is implemented as follows: a winding device for installing an insulated cable comprises a winding table, a winding mechanism, a pressing mechanism, a transmission mechanism, a guiding mechanism and a positioning mechanism, wherein the winding mechanism is located in the inner cavity of the winding table, the pressing mechanism is located at the top of the winding mechanism, the transmission mechanism is located at the rear side of the top of the winding table, the guiding mechanism is located at the front side of the winding table, and the positioning mechanism is located at the front side of the guiding mechanism; the winding mechanism is used for winding the insulated cable; the pressing mechanism is used for limiting the position of the insulated cable bundle; the transmission mechanism is used for driving the pressing mechanism; the guiding mechanism is used for limiting the position of the insulated cable; and the positioning mechanism is used for adjusting the position of the guiding mechanism.

[0006] In order to improve the convenience of winding the insulated cable, preferably, the winding mechanism includes a rotating motor, a turntable, a column and a base, the rotating motor is located at the bottom of the winding table, the surface at the output end of the rotating motor is rotatably connected to the inner wall of the winding table, the output end of the top of the rotating motor is fixedly connected to the surface of the turntable, the number of the columns is multiple and they are distributed in an annular manner on the top of the turntable and fixedly connected to the top of the turntable, the base is located at the top of the winding table and fixedly connected to the top of the winding table, the surface of the top of the base is in contact with the inner cavity of the turntable, the front and rear sides of the top of the rotating motor are fixedly installed with the bottom of the winding table by bolts, and by setting the winding mechanism, the rotating motor can achieve the effect of quickly winding the insulated cable through the cooperation between the turntable and the column.

[0007] In order to improve the placement stability of the insulated cable bundle, preferably, the pressing mechanism includes a pressing plate, a slider and a limit rod. The bottom of the pressing plate is horizontally aligned with the top of the turntable and the column. The slider is located on the rear side of the pressing plate and fixedly connected to the rear side of the pressing plate. The limit rod is located on the right side of the bottom of the pressing plate and is rotatably connected to the bottom of the pressing plate through a damping shaft. By setting up the pressing mechanism, the pressing plate can quickly press and limit the top of the insulated cable bundle, and the limit rod can block the end of the insulated cable bundle, thereby preventing the insulated cable bundle from scattering after docking with the winding mechanism.

[0008] In order to improve the ease of use of the pressing mechanism, preferably, the transmission mechanism includes a servo motor, a screw rod, an arc plate and a support rod. The servo motor is located at the top of the winding table and is fixedly installed with the top of the winding table by bolts. The screw rod is located at the top of the servo motor and is fixedly connected to the top of the servo motor. The surface of the screw rod is connected to the inner cavity of the slider by a thread. The bottom of the arc plate and the top of the screw rod are movably connected by a rotating shaft. The support rod is located at the bottom of the left side of the arc plate and is fixedly connected to the bottom of the arc plate. The bottom of the support rod is fixedly connected to the top of the winding table. By setting up the transmission mechanism, the servo motor can achieve the role of quickly driving the pressing plate and the limit rod to adjust the position through the mutual cooperation of the screw rod and the slider, thereby avoiding the situation where the pressing plate cannot be quickly driven to move when the insulated cable bundle needs to be limited.

[0009] In order to improve the winding effect of the insulated cable, preferably, the guide mechanism includes a connecting block, a movable rod and a guide block. The connecting block is located on the front side of the winding table and is fixedly connected to the front side of the winding table. The surface of the movable rod is in contact with the inner cavity of the connecting block. The guide block is located on the top of the movable rod and is fixedly connected to the top of the movable rod. By setting the guiding mechanism, the connecting block can cooperate with the movable rod and the guide block to achieve the function of assisting the insulated cable to be stably wound, thereby avoiding the insulated cable from being tangled during the winding process.

[0010] In order to improve the positioning effect of the guide mechanism, preferably, the positioning mechanism includes a positioning rod, a tension spring, a transmission block, two moving rods and two limit blocks, the positioning rod is located at the front side of the connecting block, the tension spring is located at the front side of the connecting block and is fixedly connected to the front side of the connecting block, the transmission block is located at the front side of the positioning rod and is fixedly connected to the front side of the transmission block, the two moving rods are respectively located on the left and right sides of the transmission block and are fixedly connected to the surface of the transmission block, the surface of the limit block contacts the inner cavity of the moving rod, the rear side of the limit block is fixedly connected to the front side of the connecting block, and the front side of the tension spring is fixedly connected to the rear side of the transmission block. By setting the positioning mechanism, the positioning rod can achieve the role of quickly positioning the position of the guide block through the mutual cooperation of the connecting block and the movable rod.

[0011] In order to improve the docking convenience of the positioning mechanism, preferably, a connecting hole is provided on the front side of the connecting block, and a positioning groove is provided on the front side of the movable rod. The number of the positioning grooves is multiple and evenly distributed on the front side of the movable rod. The rear side of the positioning rod passes through the connecting hole and extends to the inner cavity of the positioning groove. By setting the connecting hole and the positioning groove, the connecting hole can enable the positioning rod to be quickly docked with the positioning groove, and the multiple positioning grooves can be used to dock with the positioning rod when the guide block can be driven by the movable rod to move to a variety of different positions. When the guide block moves to a variety of different positions, the winding tension of the insulated cable can be adjusted through the connection end of the guide block and the insulated cable.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model is provided with a winding table, a winding mechanism, a pressing mechanism, a transmission mechanism, a guiding mechanism and a positioning mechanism. When the transmission block is pulled, the transmission block will drive the positioning rod to move and stretch the tension spring. In the process of moving, the transmission block will drive the moving rod to move. In the process of moving, the moving rod will assist the transmission block and the positioning rod to move through the connection end with the limit block. After the positioning rod moves to a suitable position, the movable rod is pulled to drive the guide block to adjust the position. After the guide block moves to a suitable position, the transmission block is released, the tension of the tension spring is contracted, and the positioning rod is quickly driven to reset through the transmission block. In the process of resetting, the positioning rod is inserted into the inner cavity of the positioning groove, so as to achieve the position of the guide block through the mutual cooperation of the movable rod and the connecting block, so as to achieve the effect of quickly adjusting the winding tension of the insulated cable. After the position adjustment of the guide block is completed, one side of the insulated cable passes through the inner cavity of the guide block and the insulated cable is cross-wound around the surface of multiple columns. , and then start the rotating motor, which will drive the turntable to rotate through its own output end, and the turntable will wind the insulated cable through multiple columns and the winding end of the insulated cable during the rotation process, and the turntable will ensure its own rotation stability through the cooperation with the base during the rotation process. After the insulated cable is wound to a certain extent, start the servo motor, and the servo motor will drive the lead screw to rotate through its own output end, and the lead screw will drive the pressure plate to move through the threaded connection with the slider during the rotation process, and the pressure plate will dock with the turntable and the column during the movement. After the docking is completed, turn off the servo motor, and the pressure plate will lock and position the pressure plate through the threaded connection between the slider and the lead screw, so as to achieve the effect of stably limiting the insulated cable bundle. After the insulated cable bundle is wound, flip the limit rod, and the limit rod will dock and fit with the end of the insulated cable bundle, so as to achieve the effect of pressing and limiting the end of the insulated cable bundle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a three-dimensional structure provided by an embodiment of the utility model;

[0015] Figure 2 The embodiment of the utility model provides a three-dimensional cross-sectional view;

[0016] Figure 3 It is a schematic diagram of the docking of the pressing mechanism and the winding mechanism provided by the embodiment of the utility model;

[0017] Figure 4 It is an assembly exploded diagram of a base and a turntable provided by an embodiment of the utility model;

[0018] Figure 5 It is a schematic diagram of the combination of the positioning mechanism and the connecting block provided by the embodiment of the utility model;

[0019] Figure 6 The utility model embodiment provides Figure 2 A partial enlarged view of point A in the middle.

[0020] In the figure: 1. winding table; 2. winding mechanism; 3. pressing mechanism; 4. transmission mechanism; 5. guiding mechanism; 6. positioning mechanism; 201. rotating motor; 202. turntable; 203. column; 204. base; 301. pressing plate; 302. slider; 303. limiting rod; 401. servo motor; 402. lead screw; 403. arc plate; 404. supporting rod; 501. connecting block; 502. movable rod; 503. guiding block; 601. positioning rod; 602. tension spring; 603. transmission block; 604. moving rod; 605. limiting block; 7. connecting hole; 8. positioning groove. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0022] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 6As shown, an embodiment of the utility model provides a winding device for installing an insulated cable, comprising a winding table 1, a winding mechanism 2, a pressing mechanism 3, a transmission mechanism 4, a guide mechanism 5 and a positioning mechanism 6. The winding mechanism 2 is located in the inner cavity of the winding table 1, the pressing mechanism 3 is located at the top of the winding mechanism 2, the transmission mechanism 4 is located at the rear side of the top of the winding table 1, the guide mechanism 5 is located at the front side of the winding table 1, and the positioning mechanism 6 is located at the front side of the guide mechanism 5; the winding mechanism 2 is used to wind the insulated cable; the pressing mechanism 3 is used to limit the position of the insulated cable bundle; the transmission mechanism 4 is used to drive the pressing mechanism 3; the guide mechanism 5 is used to limit the position of the insulated cable; the positioning mechanism 6 is used to adjust the position of the guide mechanism 5, and the winding mechanism 2 includes a rotating motor 201, a turntable 202, and a column 20 3 and base 204, the rotating motor 201 is located at the bottom of the winding table 1, the surface at the output end of the rotating motor 201 is rotatably connected to the inner wall of the winding table 1, the output end at the top of the rotating motor 201 is fixedly connected to the surface of the turntable 202, the number of the columns 203 is multiple and annularly distributed on the top of the turntable 202 and fixedly connected to the top of the turntable 202, the base 204 is located at the top of the winding table 1 and fixedly connected to the top of the winding table 1, the surface of the top of the base 204 is in contact with the inner cavity of the turntable 202, the front and rear sides of the top of the rotating motor 201 are fixedly installed with the bottom of the winding table 1 by bolts, and by setting the winding mechanism 2, the rotating motor 201 can achieve the mutual cooperation of the turntable 202 and the column 203. In order to achieve the effect of quickly winding the insulated cable, the pressing mechanism 3 includes a pressing plate 301, a slider 302 and a limiting rod 303. The bottom of the pressing plate 301 is horizontally aligned with the top of the turntable 202 and the column 203. The slider 302 is located at the rear side of the pressing plate 301 and is fixedly connected to the rear side of the pressing plate 301. The limiting rod 303 is located on the right side of the bottom of the pressing plate 301 and is rotatably connected to the bottom of the pressing plate 301 through a damping shaft. By setting the pressing mechanism 3, the pressing plate 301 can quickly press and limit the top of the insulated cable bundle, and the limiting rod 303 can block the end of the insulated cable bundle, thereby preventing the insulated cable bundle from scattering after docking with the winding mechanism 2. The transmission mechanism 4 includes The servo motor 401, the lead screw 402, the arc plate 403 and the support rod 404 are included. The servo motor 401 is located at the top of the winding table 1 and is fixedly installed with the top of the winding table 1 by bolts. The lead screw 402 is located at the top of the servo motor 401 and is fixedly connected with the top of the servo motor 401. The surface of the lead screw 402 is connected with the inner cavity of the slider 302 by threads. The bottom of the arc plate 403 is movably connected with the top of the lead screw 402 by a rotating shaft. The support rod 404 is located at the bottom of the left side of the arc plate 403 and is fixedly connected with the bottom of the arc plate 403. The bottom of the support rod 404 is fixedly connected with the top of the winding table 1. By setting the transmission mechanism 4, the servo motor 401 can cooperate with the lead screw 402 and the slider 302.The purpose is to quickly drive the pressure plate 301 and the limiting rod 303 to adjust the position, avoiding the situation that the pressure plate 301 cannot be quickly driven to move when the insulated cable bundle needs to be limited. The guide mechanism 5 includes a connecting block 501, a movable rod 502 and a guiding block 503. The connecting block 501 is located at the front side of the winding table 1 and is fixedly connected to the front side of the winding table 1. The surface of the movable rod 502 contacts the inner cavity of the connecting block 501. The guiding block 503 is located at the top of the movable rod 502 and is fixedly connected to the top of the movable rod 502. By setting the guiding mechanism 5, the connecting block 501 plays a role in being able to move through the movable rod 502. The rod 502 and the guide block 503 cooperate with each other to achieve the function of assisting the insulated cable to be stably wound, and avoid the insulated cable from being tangled during the winding process. The positioning mechanism 6 includes a positioning rod 601, a tension spring 602, a transmission block 603, two moving rods 604 and two limit blocks 605. The positioning rod 601 is located at the front side of the connecting block 501, the tension spring 602 is located at the front side of the connecting block 501 and is fixedly connected to the front side of the connecting block 501, the transmission block 603 is located at the front side of the positioning rod 601 and is fixedly connected to the front side of the transmission block 603, and the two moving rods 604 are respectively located at the transmission blocks 505. The left and right sides of 603 are fixedly connected to the surface of the transmission block 603, the surface of the limit block 605 contacts the inner cavity of the moving rod 604, the rear side of the limit block 605 is fixedly connected to the front side of the connecting block 501, and the front side of the tension spring 602 is fixedly connected to the rear side of the transmission block 603. By setting the positioning mechanism 6, the positioning rod 601 can quickly locate the position of the guide block 503 through the mutual cooperation between the connecting block 501 and the movable rod 502. A connecting hole 7 is provided on the front side of the connecting block 501, and a positioning groove 8 is provided on the front side of the movable rod 502. The number of the positioning grooves 8 is multiple and Evenly distributed on the front side of the movable rod 502, the rear side of the positioning rod 601 passes through the connection hole 7 and extends to the inner cavity of the positioning groove 8. By setting the connection hole 7 and the positioning groove 8, the connection hole 7 plays a role in allowing the positioning rod 601 to quickly dock with the positioning groove 8. The multiple positioning grooves 8 play a role in allowing the guide block 503 to be driven by the movable rod 502 to move to a variety of different positions and can be docked with the positioning rod 601. When the guide block 503 moves to a variety of different positions, the effect of adjusting the winding tension of the insulated cable can be achieved through the connection end of the guide block 503 and the insulated cable.

[0024] The working principle of this utility model:

[0025] When in use, the transmission block 603 is pulled, and the transmission block 603 will drive the positioning rod 601 to move and stretch the tension spring 602, and the transmission block 603 will drive the moving rod 604 to move during the movement, and the moving rod 604 will assist the transmission block 603 and the positioning rod 601 to move through the connection end with the limit block 605 during the movement. After the positioning rod 601 moves to a suitable position, the movable rod 502 is pulled to drive the guide block 503 to adjust the position. After the guide block 503 moves to a suitable position, the transmission block 603 is released, and the tension spring 602 is released. The tension of the guide block 503 is contracted, and the positioning rod 601 is quickly reset through the transmission block 603. During the reset process, the positioning rod 601 is inserted into the inner cavity of the positioning groove 8, so as to achieve the position of the guide block 503 through the cooperation between the movable rod 502 and the connecting block 501, so as to achieve the effect of quickly adjusting the winding tension of the insulated cable. After the position adjustment of the guide block 503 is completed, one side of the insulated cable is passed through the inner cavity of the guide block 503 and the insulated cable is cross-wound around the surface of multiple columns 203, and then the rotating motor 201 is started. The rotating motor 201 drives the turntable 202 to rotate through its output end, and the turntable 202 winds the insulated cable through the plurality of columns 203 and the winding end of the insulated cable during the rotation, and the turntable 202 cooperates with the base 204 during the rotation to ensure its own rotation stability. After the insulated cable is wound to a certain extent, the servo motor 401 is started, and the servo motor 401 drives the screw rod 402 to rotate through its output end, and the screw rod 402 is connected to the slider 302 through the thread during the rotation. The pressing plate 301 is driven to move, and the pressing plate 301 will dock with the turntable 202 and the column 203 during the movement. After the docking is completed, the servo motor 401 is turned off, and the pressing plate 301 will lock and position the position of the pressing plate 301 through the threaded connection between the slider 302 and the screw rod 402, so as to achieve the effect of stably limiting the insulated cable bundle. After the insulated cable bundle is wound, the limiting rod 303 is flipped, and the limiting rod 303 will dock and fit with the end of the insulated cable bundle, so as to achieve the effect of suppressing and limiting the end of the insulated cable bundle.

[0026] The specific models and specifications of the winding table 1, rotating motor 201 and servo motor 401 proposed in this application need to be selected and determined according to the actual specifications of the device. The specific selection calculation method, line connection method and control method all adopt the existing technology in this field, so they will not be described in detail.

[0027] 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", "comprise" or any other variants 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.

[0028] The above description is only a preferred embodiment of the utility model, and does not constitute any form of limitation to the utility model. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent will not depart from the scope of the technical solution of the utility model.

Claims

1. A winding device for installing an insulated cable, comprising a winding table (1), a winding mechanism (2), a pressing mechanism (3), a transmission mechanism (4), a guiding mechanism (5) and a positioning mechanism (6), characterized in that: The winding mechanism (2) is located in the inner cavity of the winding table (1), the pressing mechanism (3) is located on the top of the winding mechanism (2), the transmission mechanism (4) is located on the rear side of the top of the winding table (1), the guiding mechanism (5) is located on the front side of the winding table (1), and the positioning mechanism (6) is located on the front side of the guiding mechanism (5); The winding mechanism (2) is used for winding an insulated cable; The pressing mechanism (3) is used to limit the position of the insulated cable bundle; The transmission mechanism (4) is used to drive the pressing mechanism (3); The guide mechanism (5) is used to limit the position of the insulated cable; The positioning mechanism (6) is used to adjust the position of the guide mechanism (5).

2. A winding device for installing an insulated cable as claimed in claim 1, characterized in that: The winding mechanism (2) comprises a rotating motor (201), a turntable (202), a column (203) and a base (204); the rotating motor (201) is located at the bottom of the winding table (1); the surface at the output end of the rotating motor (201) is rotatably connected to the inner wall of the winding table (1); the output end at the top of the rotating motor (201) is fixedly connected to the surface of the turntable (202); the columns (203) are in plurality and are distributed in an annular manner on the top of the turntable (202) and are fixedly connected to the top of the turntable (202); the base (204) is located at the top of the winding table (1) and is fixedly connected to the top of the winding table (1); the surface at the top of the base (204) is in contact with the inner cavity of the turntable (202); and the front side and the rear side of the top of the rotating motor (201) are fixedly mounted to the bottom of the winding table (1) by bolts.

3. A winding device for installing an insulated cable as claimed in claim 2, characterized in that: The pressing mechanism (3) comprises a pressing plate (301), a sliding block (302) and a limiting rod (303); the bottom of the pressing plate (301) is horizontally aligned with the top of the rotating disk (202) and the column (203); the sliding block (302) is located at the rear side of the pressing plate (301) and is fixedly connected to the rear side of the pressing plate (301); and the limiting rod (303) is located at the right side of the bottom of the pressing plate (301) and is rotatably connected to the bottom of the pressing plate (301) via a damping shaft.

4. A winding device for installing an insulated cable as claimed in claim 3, characterized in that: The transmission mechanism (4) comprises a servo motor (401), a screw rod (402), an arc plate (403) and a support rod (404); the servo motor (401) is located at the top of the winding table (1) and is fixedly mounted to the top of the winding table (1) by means of bolts; the screw rod (402) is located at the top of the servo motor (401) and is fixedly connected to the top of the servo motor (401); the surface of the screw rod (402) is connected to the inner cavity of the slider (302) by means of threads; the bottom of the arc plate (403) is movably connected to the top of the screw rod (402) by means of a rotating shaft; the support rod (404) is located at the bottom of the left side of the arc plate (403) and is fixedly connected to the bottom of the arc plate (403); and the bottom of the support rod (404) is fixedly connected to the top of the winding table (1).

5. A winding device for installing an insulated cable as claimed in claim 1, characterized in that: The guide mechanism (5) comprises a connecting block (501), a movable rod (502) and a guiding block (503); the connecting block (501) is located at the front side of the winding table (1) and is fixedly connected to the front side of the winding table (1); the surface of the movable rod (502) is in contact with the inner cavity of the connecting block (501); and the guiding block (503) is located at the top of the movable rod (502) and is fixedly connected to the top of the movable rod (502).

6. A winding device for installing an insulated cable as claimed in claim 5, characterized in that: The positioning mechanism (6) comprises a positioning rod (601), a tension spring (602), a transmission block (603), two moving rods (604) and two limiting blocks (605); the positioning rod (601) is located at the front side of the connecting block (501); the tension spring (602) is located at the front side of the connecting block (501) and is fixedly connected to the front side of the connecting block (501); the transmission block (603) is located at the front side of the positioning rod (601) and is fixedly connected to the front side of the transmission block (603); the two moving rods (604) are respectively located at the left and right sides of the transmission block (603) and are fixedly connected to the surface of the transmission block (603); the surface of the limiting block (605) contacts the inner cavity of the moving rod (604); the rear side of the limiting block (605) is fixedly connected to the front side of the connecting block (501); and the front side of the tension spring (602) is fixedly connected to the rear side of the transmission block (603).

7. A winding device for installing an insulated cable as claimed in claim 6, characterized in that: The front side of the connecting block (501) is provided with a connecting hole (7), the front side of the movable rod (502) is provided with a positioning groove (8), the positioning grooves (8) are multiple in number and evenly distributed on the front side of the movable rod (502), and the rear side of the positioning rod (601) passes through the connecting hole (7) and extends to the inner cavity of the positioning groove (8).

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