CN112273863A

CN112273863A - Drawing board support device based on motor drive

Info

Publication number: CN112273863A
Application number: CN202011232781.9A
Authority: CN
Inventors: 蒋洁
Original assignee: Shanghai Dingxiao Cultural Gift Co ltd
Current assignee: Shanghai Dingxiao Cultural Gift Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-01-29

Abstract

The invention discloses a drawing board support device based on motor driving, which comprises a shell, wherein a shell cavity is arranged in the shell, a closed shell cavity is arranged in the shell, a pitching adjusting device is arranged in the shell cavity and comprises a driving motor, the built-in automatic drawing board device can adjust the pitching angle of a drawing board through the driving of the motor, so that the drawing board support device is more convenient to create, the built-in roller height adjusting device can adjust the height of the support through manually rolling a roller, a height adjusting structure has a self-locking function and does not need to manually fix the height, a base capable of freely adjusting the steering is arranged at the bottom of the support, and the support can rotate by stepping on and pressing a pedal, so that the drawing board support device is more convenient to.

Description

Drawing board support device based on motor drive

Technical Field

The invention relates to the field of motors, in particular to a drawing board support device based on motor driving.

Background

The motor is a device for converting electric energy into mechanical energy, a rotating magnetic field is generated by an electrified coil and acts on a rotor to form magnetoelectric power rotating torque, the motor is widely applied to various scenes as a power device in life, a traditional drawing board support needs to be moved manually so as to adjust the angle of a drawing board, when the drawing board is being drawn on the drawing board support, manual adjustment is very inconvenient, the height of the traditional drawing board support is complex, multiple persons need to be matched for adjustment when necessary, and the adjusting process is complicated only by manpower.

Disclosure of Invention

The invention aims to solve the technical problem of providing a drawing board support device based on motor driving, and overcomes the problems that the traditional drawing board support is complex in height adjustment, needs to be adjusted by multiple persons in a matching way when necessary, is only dependent on manpower in the adjustment process, is complex and the like.

The invention is realized by the following technical scheme.

The invention relates to a drawing board support device based on motor driving, which comprises a shell, wherein a closed shell cavity is arranged in the shell, a pitching adjusting device is arranged in the shell cavity, the pitching adjusting device comprises a driving motor, the driving motor is fixedly arranged on the inner wall of the rear side of the shell cavity, the front end of the driving motor is rotatably provided with a motor shaft, a partition plate is arranged on the motor shaft, the partition plate is fixedly arranged on the inner wall of the rear side of the shell cavity, two actuating block sliding grooves are arranged in the partition plate, the two actuating block sliding grooves are bilaterally symmetrical, the actuating block sliding grooves penetrate through the upper end surface and the lower end surface of the partition plate, actuating blocks are arranged in the actuating block sliding grooves in a sliding manner, the right actuating block is arranged on the motor shaft in a sliding manner, the motor shaft and the right actuating block are in meshed transmission through, a connecting base is fixedly arranged at the upper end of the actuating block, a linkage block is fixedly arranged at the upper end of the connecting base, one end, far away from each other, of each of the two linkage blocks is rotatably provided with a linkage block rotating shaft, one end, far away from the linkage block, of the linkage block rotating shaft is rotatably provided with a rotating rod, one end, far away from the linkage block rotating shaft, of the rotating rod is rotatably provided with a rotating rod rotating shaft, one end, far away from the rotating rod, of the rotating rod rotating shaft is rotatably provided with a lifting rod, the two lifting rods are respectively and rotatably connected with the inner walls of the left side and the right side of the cavity of the drawing board through lifting rod rotating shafts, a lifting;

a lifting adjusting device is arranged at the lower side of the pitching adjusting device and comprises an upper base, the upper base is fixedly arranged at the lower end of the shell, an upper base cavity with a downward opening is arranged in the upper base, a lower base is arranged in the upper base cavity in a sliding manner, a limiting rod is arranged at the upper side of the lower base and is fixedly arranged on the inner wall of the upper side of the upper base cavity, the lower base can slide on the limiting rod, a lifting threaded rod is arranged at the right side of the limiting rod and is rotatably arranged on the inner wall of the upper side of the upper base cavity, the lifting threaded rod and the lower base are in threaded engagement transmission, a driving wheel is fixedly arranged on the lifting threaded rod, a lifting actuating bin is arranged at the right side of the driving wheel, a closed lifting actuating cavity is arranged in the lifting actuating bin, and a manual wheel rotating shaft is arranged in the, the manual wheel rotating shaft is rotatably arranged on the inner wall of the upper side of the lifting actuating cavity, a manual wheel is fixedly arranged on the manual wheel rotating shaft, the manual wheel and the transmission wheel are in friction transmission, a manual wheel channel is arranged on the right side of the lifting actuating cavity, the manual wheel channel penetrates through the right side wall of the lifting actuating cavity, and the manual wheel penetrates through the manual wheel channel;

the lifting adjusting device is characterized in that a rotary adjusting device is arranged on the lower side of the lifting adjusting device and comprises a rotary bin, an airtight rotary cavity is formed in the rotary bin, a rotary fixing plate is arranged in the rotary cavity and fixedly arranged on the inner wall of the rear side of the rotary cavity, a lower base is arranged on the rotary fixing plate in a rotating mode and penetrates through the upper side wall of the rotary cavity, friction rotating shafts are arranged on two sides of the lower base respectively and rotatably and are arranged on the inner wall of the rear side of the rotary cavity, friction blocks are fixedly arranged on the friction rotating shafts and are connected with the inner wall of the upper side of the rotary cavity through friction reset springs.

Preferably, the front end of the bottom plate of the drawing board is fixedly provided with a rotating connecting plate, the front side of the rotating connecting plate is provided with a rotating base, the rotating base is fixedly arranged on the inner wall of the front side of the cavity of the drawing board, and the rotating connecting plate is rotatably connected with the rotating shaft of the manual wheel.

Preferably, be equipped with two drawer curb plates in the shell cavity, two the drawer curb plate is fixed the setting respectively on the inner wall of shell cavity downside, two it is equipped with the drawer to slide between the drawer curb plate, be equipped with the drawer cavity that the opening faces upward in the drawer, the drawer cavity left and right sides is equipped with the drawer gangbar spout respectively, the drawer gangbar spout runs through terminal surface about the drawer curb plate, make the movable block with through drawer gangbar fixed connection between the drawer, the drawer gangbar can slide in the drawer gangbar spout.

Preferably, the upper side of the manual wheel is provided with a self-locking bin, the self-locking bin is fixedly arranged on the inner wall of the upper side of the lifting actuating cavity, a self-locking cavity with a downward opening is arranged in the self-locking bin, the left side and the right side of the self-locking cavity are respectively provided with a rotating groove with an opening facing the self-locking cavity, a clip rotating shaft is rotationally arranged in the rotating groove, a rotating clip is fixedly arranged on the clip rotating shaft, the rear side of the rotating clip is provided with an actuating electromagnet, the two actuating electromagnets are respectively and fixedly arranged on the inner walls of the left side and the right side of the self-locking cavity, the actuating electromagnet is connected with the rotating clip through a supporting spring, a limiting wheel is arranged between the two rotating clips, the limiting wheel is fixedly arranged on the rotating shaft of the manual wheel, when the limiting wheel rotates forwards, the rotating clip cannot clamp the limiting wheel rotates backwards, the rotating clip will catch the restricting wheel.

Preferably, the rotatory fixed plate downside is equipped with the decline spout, the decline spout sets up in the rotatory cavity rear side wall, it tramples the slider to slide to be equipped with in the decline spout, trample the slider with through trampling reset spring between the decline spout downside inner wall and connecting, trample the fixed traction block that is equipped with in slider front end, the traction block with connect through the haulage rope between the clutch blocks, the fixed pedal that is equipped with of traction block right-hand member, the traction block right side is equipped with the pedal passageway, the pedal passageway runs through rotatory cavity right side wall, the pedal can slide in the pedal passageway, rotatory storehouse lower extreme is fixed and is equipped with the stabilizer plate.

The invention has the beneficial effects that: the built-in automatic drawing board device can adjust the pitching angle of the drawing board through the driving of the motor, so that the drawing board is more convenient to create, the height adjusting device with the built-in roller wheels can adjust the height of the support through manually rolling the roller wheels, the height adjusting structure has a self-locking function, the height is not required to be manually fixed, the base capable of freely adjusting the steering direction is arranged at the bottom of the support, and the support can rotate through treading on the pedal, so that the drawing board device is more convenient.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the embodiment of the present invention in the direction of A-A in FIG. 1;

FIG. 3 is a schematic view of the embodiment of the present invention in the direction B-B in FIG. 1;

FIG. 4 is an enlarged schematic view of the embodiment of the present invention at C in FIG. 1;

FIG. 5 is a schematic view of the embodiment of the present invention in the direction D-D in FIG. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The drawing board support device based on motor driving described with reference to fig. 1-5 includes a housing 10, a closed housing cavity 11 is provided in the housing 10, a pitching adjusting device 71 is provided in the housing cavity 11, the pitching adjusting device 71 includes a driving motor 12, the driving motor 12 is fixedly disposed on the inner wall of the rear side of the housing cavity 11, a motor shaft 13 is rotatably provided at the front end of the driving motor 12, a partition 25 is provided on the motor shaft 13, the partition 25 is fixedly disposed on the inner wall of the rear side of the housing cavity 11, two actuating block chutes 15 are provided in the partition 25, the two actuating block chutes 15 are symmetric in the left and right, the actuating block chutes 15 penetrate through the upper and lower end surfaces of the partition 25, actuating blocks 14 are slidably provided in the actuating block chutes 15, right actuating blocks 14 are slidably provided on the motor shaft 13, and the motor shaft 13 and the right actuating blocks 14 are in threaded engagement transmission, a drawing board cavity 24 with an upward opening is formed in the upper side of the actuating block 14, a connecting base 16 is fixedly arranged at the upper end of the actuating block 14, a linkage block 17 is fixedly arranged at the upper end of the connecting base 16, a linkage block rotating shaft 18 is rotatably arranged at one end, away from each other, of each linkage block 17, a rotating rod 19 is rotatably arranged at one end, away from the linkage block rotating shaft 17, of the linkage block rotating shaft 18, a rotating rod rotating shaft 20 is rotatably arranged at one end, away from the linkage block rotating shaft 18, of the rotating rod rotating shaft 20, a lifting rod 21 is rotatably arranged at one end, away from the rotating rod 19, of the rotating rod rotating shaft 20, the two lifting rods 21 are respectively rotatably connected with the inner walls of the left side and the right side of the drawing board cavity 24 through lifting rod rotating shafts 66, a lifting shaft 22 is rotatably;

the lower side of the pitching adjusting device 71 is provided with a lifting adjusting device 72, the lifting adjusting device 72 comprises an upper base 31, the upper base 31 is fixedly arranged at the lower end of the shell 10, an upper base cavity 32 with a downward opening is arranged in the upper base 31, a lower base 36 is arranged in the upper base cavity 32 in a sliding manner, a limiting rod 33 is arranged on the upper side of the lower base 36, the limiting rod 33 is fixedly arranged on the inner wall of the upper side of the upper base cavity 32, the lower base 36 can slide on the limiting rod 33, a lifting threaded rod 34 is arranged on the right side of the limiting rod 33, the lifting threaded rod 34 is rotatably arranged on the inner wall of the upper side of the upper base cavity 32, the lifting threaded rod 34 and the lower base 36 are in threaded engagement transmission, a transmission wheel 35 is fixedly arranged on the lifting threaded rod 34, and a lifting actuating bin 47 is arranged on the, a closed lifting actuating cavity 48 is formed in the lifting actuating bin 47, a manual wheel rotating shaft 51 is arranged in the lifting actuating cavity 48, the manual wheel rotating shaft 51 is rotatably arranged on the inner wall of the upper side of the lifting actuating cavity 48, a manual wheel 49 is fixedly arranged on the manual wheel rotating shaft 51, the manual wheel 49 and the transmission wheel 35 are in friction transmission, a manual wheel channel 50 is arranged on the right side of the lifting actuating cavity 48, the manual wheel channel 50 penetrates through the right side wall of the lifting actuating cavity 48, and the manual wheel 49 penetrates through the manual wheel channel 50;

lifting adjusting device 72 downside is equipped with rotation adjusting device 73, rotation adjusting device 73 includes rotatory storehouse 37, be equipped with airtight rotatory cavity 38 in the rotatory storehouse 37, be equipped with rotatory fixed plate 67 in the rotatory cavity 38, rotatory fixed plate 67 is fixed to be set up on the rotatory cavity 38 rear side inner wall, it is equipped with to rotate on the rotatory fixed plate 67 lower base 36, lower base 36 runs through lateral wall on the rotatory cavity 38, lower base 36 both sides are equipped with friction pivot 41 respectively, friction pivot 41 rotates to set up on the rotatory cavity 38 rear side inner wall, the fixed clutch blocks 42 that is equipped with on the friction pivot 41, clutch blocks 42 with connect through friction reset spring 40 between the rotatory cavity 38 lateral wall.

Advantageously, a rotary connecting plate 52 is fixedly arranged at the front end of the drawing board base plate 23, a rotary base 54 is arranged at the front side of the rotary connecting plate 52, the rotary base 54 is fixedly arranged on the inner wall of the front side of the drawing board cavity 24, and the rotary connecting plate 52 is rotatably connected with the manual rotating shaft 51 through a rotary rotating shaft 53.

Beneficially, be equipped with two drawer side plates 28 in the shell cavity 11, two drawer side plates 28 are fixed the setting respectively on the inner wall of shell cavity 11 downside, two it is equipped with drawer 29 to slide between the drawer side plate 28, be equipped with opening drawer cavity 30 up in the drawer 29, the drawer cavity 30 left and right sides is equipped with drawer gangbar spout 27 respectively, drawer gangbar spout 27 runs through terminal surface about the drawer side plate 28, make the moving block 14 with through drawer gangbar 26 fixed connection between the drawer 29, drawer gangbar 26 can slide in drawer gangbar spout 27.

Beneficially, an auto-lock chamber 55 is arranged on the upper side of the manual wheel 49, the auto-lock chamber 55 is fixedly arranged on the inner wall of the upper side of the lifting actuating cavity 48, an auto-lock cavity 56 with a downward opening is arranged in the auto-lock chamber 55, the left side and the right side of the auto-lock cavity 56 are respectively provided with a rotating groove 57, the opening of the rotating groove 57 faces the auto-lock cavity 56, a clip rotating shaft 59 is rotatably arranged in the rotating groove 57, a rotating clip 58 is fixedly arranged on the clip rotating shaft 59, the rear side of the rotating clip 58 is provided with an actuating electromagnet 60, the two actuating electromagnets 60 are respectively fixedly arranged on the inner walls of the left side and the right side of the auto-lock cavity 56, the actuating electromagnet 60 is connected with the rotating clip 58 through a supporting spring 61, a limiting wheel 62 is arranged between the two rotating clips 58, the limiting wheel 62 is fixedly arranged on the manual wheel rotating shaft, the rotating clip 58 does not jam the limiting wheel 62, and when the limiting wheel 62 rotates reversely, the rotating clip 58 jams the limiting wheel 62.

Beneficially, a descending chute 45 is arranged on the lower side of the rotary fixing plate 67, the descending chute 45 is arranged in the rear side wall of the rotary cavity 38, a stepping slider 64 is slidably arranged in the descending chute 45, the stepping slider 64 is connected with the inner wall of the lower side of the descending chute 45 through a stepping return spring 65, a traction block 46 is fixedly arranged at the front end of the stepping slider 64, the traction block 46 is connected with the friction block 42 through a traction rope 43, a pedal 44 is fixedly arranged at the right end of the traction block 46, a pedal channel 68 is arranged at the right side of the traction block 46, the pedal channel 68 penetrates through the right side wall of the rotary cavity 38, the pedal 44 can slide in the pedal channel 68, and a stabilizing bottom plate 39 is fixedly arranged at the lower end of the rotary cabin 37.

In the initial state, the friction return spring 40 is in the normal state, the drive motor 12 does not operate, the actuation electromagnet 60 is not energized, the support spring 61 is in the normal state, and the stepping return spring 65 is in the normal state.

When the drawing board base plate works, the driving motor 12 starts to work, the driving motor 12 drives the motor shaft 13 to rotate, the motor shaft 13 drives the right side actuating block 14 to move forwards through threaded engagement transmission, the right side actuating block 14 drives the drawer cavity 30 to move forwards through the drawer linkage rod 26, meanwhile, the actuating block 14 drives the connecting base 16 to move forwards, the connecting base 16 drives the linkage block 17 to move forwards, the linkage block 17 drives the rotary rod 19 to move forwards through the linkage block rotary shaft 18, the rotary rod 19 rotates upwards around the linkage block rotary shaft 18, the front end of the rotary rod 19 moves upwards, the rotary rod 19 drives the rotary rod rotary shaft 20 to move upwards, the rotary rod rotary shaft 20 drives the lifting rod 21 to rotate upwards around the lifting rod rotary shaft 66, the lifting rod 21 drives the lifting shaft 22 to move upwards, the lifting shaft 22 drives the rear end of the drawing board base plate 23 to move upwards, the front end of the drawing board base plate 23 rotates on the, so that the drawing board bottom plate 23 slowly rotates from the horizontal posture to the vertical posture;

if the height of the bracket needs to be adjusted, the manual wheel 49 is rotated in a forward direction, the manual wheel 49 drives the transmission wheel 35 to rotate through friction transmission, the transmission wheel 35 drives the lifting threaded rod 34 to rotate, the lifting threaded rod 34 and the lower base 36 are in threaded engagement transmission, so that the lifting threaded rod 34 moves upwards, the lifting threaded rod 34 drives the upper base 31 to move upwards through the limiting of the limiting rod 33, the upper base 31 drives the shell 10 to move upwards, when the height is adjusted to be proper, the manual wheel 49 is loosened, at the moment, the supporting spring 61 has elastic potential energy, the supporting spring 61 pushes the rotary clamp 58 to cling to the limiting wheel 62, the rotary clamp 58 clamps the limiting wheel 62, the limiting wheel 62 cannot rotate, the manual wheel rotating shaft 51 cannot rotate, so that the manual wheel 49 cannot rotate, the height of the upper base 31 cannot fall, if the height is required to fall, the actuating electromagnet 60 is electrified, and the actuating electromagnet 60 attracts the rotary clamp 58 to rotate in a direction close to, the rotating clip 58 is not tightly attached to the limiting wheel 62, and the limiting wheel 62 can rotate freely, so that the upper base 31 descends slowly due to gravitational potential energy;

if the support needs to be rotated, the pedal 44 is stepped downwards, the pedal 44 moves downwards, the pedal 44 drives the traction block 46 to move downwards, the traction block 46 pulls the traction rope 43 downwards, the traction rope 43 pulls the friction block 42 to rotate, the friction block 42 is not tightly attached to the lower base 36, the lower base 36 can rotate freely, then the support is rotated, the pedal 44 is released after the support is at a proper height, the friction return spring 40 pulls the friction block 42 to return to the initial position due to the elastic potential energy of the friction return spring 40, the friction block 42 is tightly attached to the lower base 36, and the lower base 36 cannot rotate at the moment.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a drawing board support device based on motor drive, includes the shell, its characterized in that: the pitching adjusting device comprises a driving motor, the driving motor is fixedly arranged on the inner wall of the rear side of the cavity of the shell, the front end of the driving motor is rotatably provided with a motor shaft, a partition plate is arranged on the motor shaft and fixedly arranged on the inner wall of the rear side of the cavity of the shell, two actuating block chutes are arranged in the partition plate and are bilaterally symmetrical, the actuating block chutes penetrate through the upper end surface and the lower end surface of the partition plate, actuating blocks are arranged in the actuating block chutes in a sliding manner, the right actuating block is arranged on the motor shaft in a sliding manner, the motor shaft and the right actuating block are in meshing transmission through threads, a drawing board cavity with an upward opening is arranged on the upper side of the actuating block, and a connecting base is fixedly arranged at the upper end of the actuating block, a linkage block is fixedly arranged at the upper end of the connecting base, a linkage block rotating shaft is arranged at one end, far away from each other, of each linkage block, a rotating rod is arranged at one end, far away from the linkage block, of the linkage block rotating shaft, a rotating rod rotating shaft is arranged at one end, far away from the linkage block rotating shaft, of the rotating rod, a lifting rod is arranged at one end, far away from the rotating rod, of the rotating rod, the two lifting rods are respectively and rotatably connected with the inner walls of the left side and the right side of the drawing board cavity through the lifting rod rotating shaft, a lifting shaft is rotatably arranged between the two lifting rods, a drawing board bottom plate is fixedly arranged on the lifting shaft, a lifting adjusting device is arranged at the lower side of the pitching adjusting device and comprises an upper base, the upper base is fixedly arranged at the lower end of the shell, an upper base cavity with a, the upper side of the lower base is provided with a limiting rod which is fixedly arranged on the inner wall of the upper side of the cavity of the upper base, the lower base can slide on the limiting rod, the right side of the limiting rod is provided with a lifting threaded rod which is rotatably arranged on the inner wall of the upper side of the cavity of the upper base, the lifting threaded rod and the lower base are in threaded engagement transmission, the lifting threaded rod is fixedly provided with a driving wheel, the right side of the driving wheel is provided with a lifting actuating bin, a closed lifting actuating cavity is arranged in the lifting actuating bin, a manual wheel rotating shaft is arranged in the lifting actuating cavity and is rotatably arranged on the inner wall of the upper side of the lifting actuating cavity, a manual wheel is fixedly arranged on the manual wheel rotating shaft, the manual wheel and the driving wheel are in friction transmission, and the right side of the lifting actuating cavity is provided with a manual, the manual wheel passageway runs through go up and down to actuate cavity right side wall, the manual wheel runs through the manual wheel passageway, the lift adjusting device downside is equipped with rotary adjusting device, rotary adjusting device includes rotatory storehouse, be equipped with airtight rotatory cavity in the rotatory storehouse, be equipped with rotatory fixed plate in the rotatory cavity, rotatory fixed plate is fixed to be set up on the rotatory cavity rear side inner wall, it is equipped with to rotate on the rotatory fixed plate the base down, the base runs through down lateral wall on the rotatory cavity, the base both sides are equipped with the friction pivot respectively down, the friction pivot rotates to set up on the rotatory cavity rear side inner wall, the fixed clutch blocks that are equipped with in the friction pivot, the clutch blocks with connect through friction reset spring between the rotatory cavity upside inner wall.

2. The drawing board support device based on motor drive of claim 1, wherein: the drawing board bottom plate front end is fixed and is equipped with swivelling joint board, the swivelling joint board front side is equipped with rotating base, rotating base is fixed to be set up on the inner wall of drawing board cavity front side, rotating joint board with rotate through rotatory pivot between the manual wheel pivot and be connected.

3. The drawing board support device based on motor drive of claim 1, wherein: the drawer side plate structure is characterized in that two drawer side plates are arranged in the shell cavity, the two drawer side plates are fixedly arranged on the inner wall of the lower side of the shell cavity respectively, a drawer is arranged between the drawer side plates in a sliding mode, a drawer cavity with an upward opening is formed in the drawer, drawer linkage rod sliding grooves are formed in the left side and the right side of the drawer cavity respectively, the drawer linkage rod sliding grooves penetrate through the left end face and the right end face of each drawer side plate, an actuating block is fixedly connected with the drawer through a drawer linkage rod, and the drawer linkage rod can slide in the drawer linkage rod sliding grooves.

4. The drawing board support device based on motor drive of claim 1, wherein: the upper side of the manual wheel is provided with a self-locking bin which is fixedly arranged on the inner wall of the upper side of the lifting actuating cavity, the self-locking bin is internally provided with a self-locking cavity with a downward opening, the left side and the right side of the self-locking cavity are respectively provided with a rotating groove with an opening facing the self-locking cavity, a clip rotating shaft is rotationally arranged in the rotating groove, a rotating clip is fixedly arranged on the clip rotating shaft, the rear side of the rotating clip is provided with an actuating electromagnet, the two actuating electromagnets are respectively and fixedly arranged on the inner walls of the left side and the right side of the self-locking cavity, the actuating electromagnet is connected with the rotating clip through a supporting spring, a limiting wheel is arranged between the two rotating clips, the limiting wheel is fixedly arranged on the manual wheel rotating shaft, when the limiting wheel rotates forwards, the rotating clip cannot clamp the limiting wheel, when the limiting wheel rotates backwards, the rotating clip will catch the restricting wheel.

5. The drawing board support device based on motor drive of claim 1, wherein: rotatory fixed plate downside is equipped with the decline spout, the decline spout sets up in the rotatory cavity rear side wall, it tramples the slider to slide to be equipped with in the decline spout, trample the slider with connect through trampling reset spring between the decline spout downside inner wall, trample the fixed traction block that is equipped with in slider front end, the traction block with connect through the haulage rope between the clutch blocks, the fixed pedal that is equipped with of traction block right-hand member, the traction block right side is equipped with the pedal passageway, the pedal passageway runs through rotatory cavity right side wall, the pedal can slide in the pedal passageway, rotatory storehouse lower extreme is fixed and is equipped with stable bottom plate.