CN118305618A - Drilling tool for front end cover of three-phase asynchronous motor - Google Patents

Abstract

The invention discloses a drilling tool for a front end cover of a three-phase asynchronous motor, which comprises a workbench and a placing plate, wherein the placing plate is fixedly connected to the top of the workbench, a connecting component is arranged on the outer wall of the placing plate, a clamping component is arranged on the outer wall of the placing plate, and the connecting component consists of a limiting unit and a fixing unit. According to the invention, after the movable plate is fixed, the drilling plate can be moved in a sliding mode, so that the drilling plate drives the extending column to slide in the movable plate and the placing plate, the semicircular rod arranged on the outer wall of the extending column can limit the extending column, the stability of the extending column in the descending process is ensured, the motor is started, the motor drives the threaded column to rotate through the output shaft, and the outer wall of the threaded column is matched with the inner wall of the extending column, so that the extending column can move under the action of threads when the threaded column rotates, and the fixing of the drilling plate is completed, and the operation is simple and convenient.

Description

Drilling tool for front end cover of three-phase asynchronous motor

Technical Field

The invention relates to the technical field of processing of three-phase asynchronous motors, in particular to a drilling tool for a front end cover of a three-phase asynchronous motor.

Background

The three-phase asynchronous motor is one kind of induction motor, and is one kind of motor powered by 380V three-phase AC current phase difference of 120 deg.c. The existing motor needs to process the inside of the front end cover in the production process, and a drilling tool is needed in the processing process.

The utility model discloses a drilling frock of three-phase asynchronous motor front end housing in chinese patent publication No. CN215967566U, dismantle a section of thick bamboo through the design, place the material at the top of movable block, and make the side cardboard of apron both sides can with the mutual joint of the outer wall of extension rod, after above-mentioned method is installed, install the inside at the apron with suitable dismantlement section of thick bamboo screw thread again, make the dismantlement section of thick bamboo can laminate each other with the outer wall of movable rod at the in-process of installation, and the in-process movable rod of laminating can be continuous outside extension, cause the whole ability joint of movable rod in the inside of extension rod at the in-process of extension, make dismantlement section of thick bamboo to cause spacingly to the apron, compare traditional frock, this frock can also form spacingly to the apron at top when changing the aperture size, avoid producing the slip at the in-process of work, then make work efficiency can be improved.

When the drilling tool is used for installing and dismantling the cylinder, the cylinder is movably dismantled in a rotating mode, so that the dismantling cylinder moves under the action of the screw thread and pushes the movable rod to move, the movable rod penetrates through the extension rod, and therefore limiting of the cover plate is completed; however, since the disassembly cylinder vertically moves in a threaded manner and is cylindrical, the disassembly cylinder cannot push the movable rod to move in the moving process, and the movable rod can block the movement of the disassembly cylinder, so that a certain partial phenomenon exists.

Disclosure of Invention

The invention aims to provide a drilling tool for a front end cover of a three-phase asynchronous motor, which aims to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a three-phase asynchronous motor front end housing drilling frock, includes the workstation and places the board, place board fixed connection in the top of workstation, the outer wall of placing the board is provided with coupling assembling, the outer wall of placing the board is provided with joint subassembly.

The connecting assembly consists of a limiting unit and a fixing unit, the limiting unit is located at the top of the workbench, the fixing unit is located on the outer wall of the placing plate, the clamping assembly consists of a movable unit and a lifting unit, the movable unit is located on the outer wall of the placing plate, and the lifting unit is located on the outer wall of the placing plate.

According to the technical scheme, the limiting unit comprises a shell, a movable plate, a first turnover plate, a second turnover plate, a magnetic plate, an outer rod, a sliding ring, a bent rod and a pull rod, wherein the shell is arranged at the top of the placing plate, the movable plate is fixedly connected to the top of the shell, the first turnover plate is arranged on the outer wall of the movable plate, the second turnover plate is arranged on the outer wall of the movable plate, the magnetic plate is fixedly connected to the inner part of the first turnover plate, the outer rod is fixedly connected to the top of the placing plate, the sliding ring is arranged on the outer wall of the outer rod, the bent rod is fixedly connected to the top of the sliding ring, and the pull rod is fixedly connected to the top of the bent rod.

According to the technical scheme, the top fixedly connected with flange of board is placed, the inner wall of shell and the outer wall sliding connection of flange can accomplish the installation to the shell through gliding mode, turnover plate one and turnover plate two all rotate with the fly leaf and be connected, turnover plate one and turnover plate two can rotate at the outer wall of fly leaf, the draw-in groove has all been seted up at the top of turnover plate one and turnover plate two's top, the magnetic plate distributes in the inside of turnover plate one and turnover plate two's inside, is located the magnetic plate of turnover plate one inside and the magnetic plate that is located turnover plate two inside are mutually exclusive, repulsive force between the magnetic plate can promote turnover plate one and turnover plate two and rotate, sliding ring and outer pole sliding connection, and the sliding ring can remove at the outer wall of outer pole, bent rod and draw-in groove joint to accomplish the spacing to turnover plate one and turnover plate two, the pull rod runs through the outer pole to with the inner wall sliding connection that outer pole was run through, can make the bent rod drive through pulling the pull rod.

According to the technical scheme, the fixed unit comprises a drilling plate, an extension column, a motor, an output shaft and a threaded column, wherein the drilling plate is arranged at the top of the movable plate, the extension column is fixedly connected to the bottom of the drilling plate, the motor is fixedly connected to the inner bottom of the workbench, the output shaft is arranged at the top output end of the motor, and the threaded column is fixedly connected to the top end of the output shaft.

According to the technical scheme, the outer wall fixedly connected with semicircle pole of extension post, the bottom of extension post runs through the fly leaf, places board and workstation to extend to the inside of workstation, the outer wall of extension post respectively with the inner wall of fly leaf, place the inner wall sliding connection of inner wall and workstation of board, can accomplish the preinstallation to the drilling board through gliding mode, the top of screw thread post extends to the inside of extension post, the outer wall of screw thread post and the inner wall adaptation of extension post, rotatory screw thread post, alright make the extension post remove under the effect of screw thread.

According to the technical scheme, the movable unit comprises a clamping plate, a spring push plate, a telescopic rod and a connecting plate, wherein the clamping plate is arranged on the outer wall of the drilling plate, the spring push plate is arranged on the outer wall of the clamping plate, the telescopic rod is fixedly connected to the top of the workbench, and the connecting plate is fixedly connected to the outer wall of the spring push plate.

According to the technical scheme, the cardboard and drilling board joint, the existence of cardboard can play spacing effect to the drilling board, the bottom fixed connection of telescopic link's top and connecting plate, the telescopic link can drive the connecting plate and remove.

According to the technical scheme, the lifting unit comprises an outer ring, a threaded rod and a driving belt, wherein the outer ring is fixedly connected to the outer wall of the spring push plate, the threaded rod is installed at the top of the workbench, and the driving belt is installed on the outer wall of the output shaft.

According to the technical scheme, the top of threaded rod runs through the outer loop to extend to the outside of outer loop, the outer wall of threaded rod and the inner wall adaptation of outer loop, and when the threaded rod rotated, the outer loop just can drive the spring push pedal under the effect of screw thread and remove, the bottom of threaded rod runs through the top of workstation and the driving pulley of driving belt, and rotates with the inner wall bottom of workstation to be connected, the threaded rod is rotated with the inner wall that the workstation was run through and is connected, and when the output shaft drove the driving pulley of driving belt rotatory, the driving pulley of driving belt just can drive the threaded rod and rotate.

Compared with the prior art, the invention has the following beneficial effects:

1. According to the invention, after the movable plate is fixed, the drilling plate can be moved in a sliding mode, so that the drilling plate drives the extending column to slide in the movable plate and the placing plate, the semicircular rod arranged on the outer wall of the extending column can limit the extending column, the stability of the extending column in the descending process is ensured, the motor is started, the motor drives the threaded column to rotate through the output shaft, and the outer wall of the threaded column is matched with the inner wall of the extending column, so that the extending column can move under the action of threads when the threaded column rotates, and the fixing of the drilling plate is completed, and the operation is simple and convenient.

2. According to the invention, the movable plate, the magnetic plate and the bent rod are arranged, the movable plate can be moved in a sliding manner, so that the bottom of the shell is abutted against the top of the placing plate, the first turnover plate and the second turnover plate are rotated, so that the magnetic plates are contacted, the bent rod is driven by the pull rod to slide on the outer wall of the outer rod through the sliding ring by moving the pull rod until one end of the bent rod, which is far away from the sliding ring, is clamped into the clamping groove formed in the top of the turnover plate, and therefore limiting of the first turnover plate and the second turnover plate is completed, and at the moment, the movable plate is fixed, and the operation is simple and convenient.

3. According to the invention, the clamping plate, the spring pushing plate and the telescopic rod are arranged, so that the clamping plate can be pushed to move, and due to the clamping connection between the clamping plate and the drilling plate, after the clamping plate is pulled by the spring pushing plate to move to a proper position, the clamping plate can be pushed to move in a sliding mode, so that the clamping plate limits the drilling plate, the stability of the drilling plate in the working process is ensured, and the telescopic rod is arranged, so that the stability of the spring pushing plate in the lifting process is ensured.

4. According to the invention, the outer ring, the threaded rod and the driving belt are arranged, when the motor is started, the driving wheel of the driving belt is driven to rotate through the output shaft, and when the driving wheel of the driving belt rotates, the driven wheel of the driving belt is driven to operate.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the work table of the present invention;

FIG. 3 is a partially broken away schematic illustration of the structure of the connection assembly of the present invention;

FIG. 4 is a partial schematic view of the structure of the connection assembly of the present invention;

FIG. 5 is a schematic view of a part of the structure of the clamping assembly according to the present invention;

Fig. 6 is a schematic side view of the working internal structure of the present invention.

In the figure: 1. a work table; 2. placing a plate; 3. a connection assembly; 301. a housing; 302. a movable plate; 303. the first overturning plate is arranged; 304. a second overturning plate; 305. a magnetic plate; 306. an outer rod; 307. a slip ring; 308. bending a rod; 309. a pull rod; 310. drilling a hole plate; 311. an extension column; 312. a motor; 313. an output shaft; 314. a threaded column; 4. a clamping assembly; 401. a clamping plate; 403. a spring push plate; 404. a telescopic rod; 405. a connecting plate; 406. an outer ring; 407. a threaded rod; 408. a drive belt.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the present invention provides the following technical solutions: the utility model provides a three-phase asynchronous motor front end housing drilling frock, including workstation 1 with place board 2, place board 2 fixed connection in the top of workstation 1, place the outer wall of board 2 and be provided with coupling assembling 3, coupling assembling 3 comprises spacing unit and fixed unit, spacing unit is located the top of workstation 1, fixed unit is located the outer wall of placing board 2, the outer wall of placing board 2 is provided with joint subassembly 4, joint subassembly 4 has movable unit and lifting unit to constitute, the movable unit is located the outer wall of placing board 2, lifting unit is located the outer wall of placing board 2.

The limiting unit comprises a shell 301, a movable plate 302, a first turnover plate 303, a second turnover plate 304, a magnetic plate 305, an outer rod 306, a slip ring 307, a bent rod 308 and a pull rod 309, wherein the shell 301 is arranged at the top of the placing plate 2, the top of the placing plate 2 is fixedly connected with a convex plate, the inner wall of the shell 301 is in sliding connection with the outer wall of the convex plate, the installation of the shell 301 can be completed in a sliding manner, the movable plate 302 is fixedly connected with the top of the shell 301, the first turnover plate 303 is arranged on the outer wall of the movable plate 302, the second turnover plate 304 is arranged on the outer wall of the movable plate 302, the first turnover plate 303 and the second turnover plate 304 are both in rotary connection with the movable plate 302, the top of the first turnover plate 303 and the top of the second turnover plate 304 are both provided with clamping grooves, the magnetic plate 305 is fixedly connected with the inner part of the first turnover plate 303, the magnetic plates 305 are distributed in the first turnover plate 303 and the second turnover plate 304, the magnetic plates 305 in the first turnover plate 303 are mutually exclusive with the magnetic plates 305 in the second turnover plate 304, repulsive force between the magnetic plates 305 can push the first turnover plate 303 and the second turnover plate 304 to rotate, the outer rod 306 is fixedly connected to the top of the placing plate 2, the sliding ring 307 is mounted on the outer wall of the outer rod 306, the sliding ring 307 is slidably connected with the outer rod 306, the sliding ring 307 can move on the outer wall of the outer rod 306, the bent rod 308 is fixedly connected to the top of the sliding ring 307, the bent rod 308 is clamped with the clamping groove, the bent rod 308 can be matched with the clamping groove, limiting of the first turnover plate 303 and the second turnover plate 304 is completed, the pull rod 309 is fixedly connected to the top of the bent rod 308, the pull rod 309 penetrates through the outer rod 306 and is slidably connected with the inner wall of the outer rod 306, and the bent rod 308 can be driven to move by pulling the pull rod 309.

Through being provided with extension post 311 and screw post 314, accomplish the fixed back to fly leaf 302, can remove drilling board 310 through the gliding mode for drilling board 310 drives extension post 311 and slides in the inside of fly leaf 302 and place the inside of board 2, and the semicircle pole of extension post 311 outer wall installation can play spacing effect to extension post 311, guarantee the stability of extension post 311 decline in-process, starter motor 312 drives screw post 314 through output shaft 313 and rotates, because the outer wall of screw post 314 and the inner wall adaptation of extension post 311, consequently, when screw post 314 is rotatory, extension post 311 can remove under the effect of screw thread, thereby accomplish the fixed to drilling board 310, and is easy and convenient to operate.

The fixed unit includes drilling board 310, extension post 311, motor 312, output shaft 313 and screw thread post 314, drilling board 310 sets up in the top of fly leaf 302, extension post 311 fixed connection is in the bottom of drilling board 310, drilling board 310 installs in the top of fly leaf 302, extension post 311 fixed connection is in the bottom of drilling board 310, the outer wall fixedly connected with semicircle pole of extension post 311, the bottom of extension post 311 runs through fly leaf 302, place board 2 and workstation 1, and extend to the inside of workstation 1, the outer wall of extension post 311 respectively with the inner wall of fly leaf 302, place the inner wall of board 2 and the inner wall sliding connection of workstation 1, can accomplish the preinstallation to drilling board 310 through the mode of sliding, motor 312 fixed connection is in the inside bottom of workstation 1, output shaft 313 installs in the top output of motor 312, screw thread post 314 fixed connection is on the top of output shaft 313, the top of screw thread post 314 extends to the inside of extension post 311, the outer wall and the inner wall adaptation of extension post 311, rotatory screw thread post 314, can make extension post 311 remove under the effect of screw thread.

Through being provided with fly leaf 302, magnetic plate 305 and bent rod 308, can remove fly leaf 302 through the mode of sliding for the bottom of shell 301 with place the top butt of board 2, rotatory turnover plate 303 and turnover plate 304 afterwards, make contact between magnetic plate 305, through removing pull rod 309, make pull rod 309 drive bent rod 308 through sliding ring 307 and slide at the outer wall of outer pole 306, until the one end card that the bent rod 308 kept away from sliding ring 307 is gone into the draw-in groove of seting up at turnover plate top, thereby accomplish the spacing to turnover plate 303 and turnover plate 304, the fly leaf 302 just accomplishes fixedly this moment, easy operation is convenient.

The movable unit includes cardboard 401, spring push pedal 403, telescopic link 404 and connecting plate 405, cardboard 401 installs in the outer wall of drilling board 310, cardboard 401 and drilling board 310 joint, the existence of cardboard 401 can play spacing effect to drilling board 310, spring push pedal 403 installs in the outer wall of cardboard 401, telescopic link 404 fixed connection is at the top of workstation 1, connecting plate 405 fixed connection is in the outer wall of spring push pedal 403, the top of telescopic link 404 and the bottom fixed connection of connecting plate 405, telescopic link 404 can drive connecting plate 405 and remove.

Through being provided with cardboard 401, spring push pedal 403 and telescopic link 404, the existence of spring push pedal 403 can promote cardboard 401 and remove, because cardboard 401 and drilling board 310 joint, consequently after spring push pedal 403 pulls cardboard 401 to suitable position, just can promote cardboard 401 through gliding mode and remove for cardboard 401 carries out spacingly to drilling board 310, guarantees the stability in the drilling board 310 course of working, and the setting of telescopic link 404 can guarantee the stability of spring push pedal 403 in-process of going up and down.

The lifting unit comprises an outer ring 406, a threaded rod 407 and a driving belt 408, wherein the outer ring 406 is fixedly connected to the outer wall of the spring push plate 403, the threaded rod 407 is installed at the top of the workbench 1, the top end of the threaded rod 407 penetrates through the outer ring 406 and extends to the outside of the outer ring 406, the outer wall of the threaded rod 407 is matched with the inner wall of the outer ring 406, when the threaded rod 407 rotates, the outer ring 406 drives the spring push plate 403 to move under the action of threads, the driving belt 408 is installed on the outer wall of the output shaft 313, the bottom end of the threaded rod 407 penetrates through the top of the workbench 1 and the driven wheel of the driving belt 408 and is in rotary connection with the bottom of the inner wall of the workbench 1, and when the output shaft 313 drives the driving belt 408 to rotate, the driven wheel of the driving belt 408 drives the threaded rod 407 to rotate.

Through being provided with outer loop 406, threaded rod 407 and drive belt 408, after motor 312 starts, just can drive the action wheel of drive belt 408 through output shaft 313 and rotate, when drive belt 408 action wheel rotated, can drive the driven driving wheel of drive belt 408 and move, because from driving wheel and threaded rod 407 fixed connection, consequently follow the driving wheel and can drive threaded rod 407 and rotate, because the inner wall of outer loop 406 and the outer wall adaptation of threaded rod 407, when threaded rod 407 rotated, outer loop 406 just can drive spring push pedal 403 under the effect of screw thread and remove, conveniently fix drilling board 310.

Working principle: during installation, the movable plate 302 is moved in a sliding manner, so that the movable plate 302 drives the shell 301 to move until the bottom of the shell 301 is abutted against the top of the placing plate 2, then the turnover plate is swung, the outer wall of the turnover plate I303 is abutted against the outer wall of the turnover plate II 304, the magnetic plate 305 is contacted, then the bent rod 308 is pushed in a sliding manner, the sliding ring 307 is pushed by the bent rod 308 to move on the outer wall of the outer rod 306 until the bottom end of the bent rod 308 is clamped with a clamping groove positioned at the top of the turnover plate, limiting of the turnover plate is completed, at this time, the movable plate 302 is fixed, then the drilling plate 310 is moved in a sliding manner, the extension column 311 slides inside the movable plate 302 and the placing plate 2, the motor 312 is started, and the motor 312 drives the threaded column 314 to rotate through the output shaft 313, so that the extension column 311 moves under the action of threads, and the installation of the drilling plate 310 is completed.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a three-phase asynchronous motor front end housing drilling frock, includes workstation (1) and places board (2), place board (2) fixed connection in the top of workstation (1), its characterized in that: the outer wall of the placing plate (2) is provided with a connecting component (3), and the outer wall of the placing plate (2) is provided with a clamping component (4);

The connecting component (3) consists of a limiting unit and a fixing unit, the limiting unit is positioned at the top of the workbench (1), the fixing unit is positioned on the outer wall of the placing plate (2), the clamping component (4) consists of a movable unit and a lifting unit, the movable unit is positioned on the outer wall of the placing plate (2), and the lifting unit is positioned on the outer wall of the placing plate (2);

The limiting unit comprises a shell (301), a movable plate (302), a first turnover plate (303), a second turnover plate (304), a magnetic plate (305), an outer rod (306), a sliding ring (307), a bent rod (308) and a pull rod (309), wherein the shell (301) is arranged at the top of the placing plate (2), the movable plate (302) is fixedly connected to the top of the shell (301), the first turnover plate (303) is arranged on the outer wall of the movable plate (302), the second turnover plate (304) is arranged on the outer wall of the movable plate (302), the magnetic plate (305) is fixedly connected to the inside of the first turnover plate (303), the outer rod (306) is fixedly connected to the top of the placing plate (2), the sliding ring (307) is arranged on the outer wall of the outer rod (306), the bent rod (308) is fixedly connected to the top of the sliding ring (307), and the pull rod (309) is fixedly connected to the top of the bent rod (308).

The fixing unit comprises a drilling plate (310), an extension column (311), a motor (312), an output shaft (313) and a threaded column (314), wherein the drilling plate (310) is arranged at the top of the movable plate (302), the extension column (311) is fixedly connected to the bottom of the drilling plate (310), the motor (312) is fixedly connected to the inner bottom of the workbench (1), the output shaft (313) is arranged at the top output end of the motor (312), and the threaded column (314) is fixedly connected to the top end of the output shaft (313);

The movable unit comprises a clamping plate (401), a spring pushing plate (403), a telescopic rod (404) and a connecting plate (405), wherein the clamping plate (401) is installed on the outer wall of the drilling plate (310), the spring pushing plate (403) is installed on the outer wall of the clamping plate (401), the telescopic rod (404) is fixedly connected to the top of the workbench (1), and the connecting plate (405) is fixedly connected to the outer wall of the spring pushing plate (403);

The lifting unit comprises an outer ring (406), a threaded rod (407) and a driving belt (408), wherein the outer ring (406) is fixedly connected to the outer wall of the spring push plate (403), the threaded rod (407) is arranged at the top of the workbench (1), and the driving belt (408) is arranged on the outer wall of the output shaft (313).

2. The drilling tool for the front end cover of the three-phase asynchronous motor according to claim 1, wherein: the top fixedly connected with flange of placing board (2), the inner wall of shell (301) and the outer wall sliding connection of flange, upset board one (303) and upset board two (304) all rotate with fly leaf (302) to be connected, draw-in groove has all been seted up at the top of upset board one (303) and the top of upset board two (304), magnetic plate (305) distribute in the inside of upset board one (303) and the inside of upset board two (304), are located inside magnetic plate (305) of upset board one (303) and the inside magnetic plate (305) of upset board two (304) are mutually exclusive, sliding ring (307) and outer pole (306) sliding connection, bent rod (308) and draw-in groove joint, pull rod (309) run through outer pole (306) to with the inner wall sliding connection that outer pole (306) was run through.

3. The drilling tool for the front end cover of the three-phase asynchronous motor according to claim 2, wherein: the outer wall fixedly connected with semicircle pole of extension post (311), the bottom of extension post (311) runs through fly leaf (302), places board (2) and workstation (1) to extend to the inside of workstation (1), the outer wall of extension post (311) respectively with the inner wall of fly leaf (302), the inner wall of placing board (2) and the inner wall sliding connection of workstation (1), the inside of extension post (311) is extended to the top of screw thread post (314), the outer wall of screw thread post (314) and the inner wall adaptation of extension post (311).

4. A three-phase asynchronous motor front end housing drilling tool as claimed in claim 3, wherein: the clamping plate (401) is clamped with the drilling plate (310), and the top of the telescopic rod (404) is fixedly connected with the bottom of the connecting plate (405).

5. The drilling tool for the front end cover of the three-phase asynchronous motor according to claim 4, wherein: the top of threaded rod (407) runs through outer loop (406) to extend to the outside of outer loop (406), the outer wall of threaded rod (407) and the inner wall adaptation of outer loop (406), the driven wheel of top and driving belt (408) of workstation (1) are run through to the bottom of threaded rod (407), and rotate with the inner wall bottom of workstation (1) and be connected, threaded rod (407) are rotated with the inner wall that workstation (1) was run through and are connected.