CN110949555A

CN110949555A - Mechanical snake with moisture-proof structure

Info

Publication number: CN110949555A
Application number: CN201911148235.4A
Authority: CN
Inventors: 邓君; 马浩鹏
Original assignee: Dongguan University of Technology
Current assignee: Dongguan University of Technology
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-04-03
Anticipated expiration: 2039-11-21
Also published as: CN110949555B

Abstract

The invention relates to a mechanical snake with a damp-proof structure, which comprises a main section disc and a sealing cover, wherein an installation cylinder is fixed on the outer wall of one side of the main section disc, external threads are arranged on the periphery of the outer wall of the installation cylinder, the sealing cover is connected to the other side of the installation cylinder, tightening holes are arranged on the periphery of the inner wall of the main section disc, holes are distributed on two sides of the outer wall of the tightening holes, movable beads are movably connected on the inner wall of the tightening holes, connecting columns are distributed on one sides of the movable beads, and fixing pieces are fixed on the other sides of the connecting columns. Can effectively satisfy the user to the inside operation of overhauing.

Description

Mechanical snake with moisture-proof structure

Technical Field

The invention relates to the technical field of mechanical snakes, in particular to a mechanical snake with a moisture-proof structure.

Background

The mechanical snake has a great application prospect in the fields of military and civil aviation, is flexible enough to reach areas where other mechanical devices cannot reach, plays an important role in some detection or search and rescue after disasters, and particularly has perfect bending joints, so that the mechanical snake can easily pass through a narrow space, and can arch up to jump over an obstacle to perform shooting work when encountering the obstacle.

The existing mechanical snake is poor in ground grabbing effect in use and cannot effectively move on smooth ground, the internal circuit of the mechanical snake is placed in a disordered mode in use and runs for a long time, the internal circuit of the mechanical snake influences effective working and running of the mechanical snake, and therefore the mechanical snake with the moisture-proof structure is designed.

Disclosure of Invention

The invention aims to provide a mechanical snake with a moisture-proof structure, and aims to solve the problems that the existing mechanical snake in the background art has poor ground grabbing effect in use and cannot effectively move on smooth ground, and the mechanical snake is disordered in arrangement and runs for a long time in use, and the effective working and running of the mechanical snake is influenced by the internal circuit of the mechanical snake.

In order to achieve the purpose, the invention provides the following technical scheme: a mechanical snake with a moisture-proof structure comprises a main section disc and a sealing cover, wherein an installation cylinder is fixed on the outer wall of one side of the main section disc, external threads are arranged on the periphery of the outer wall of the installation cylinder, the sealing cover is connected to the other side of the installation cylinder, tightening holes are formed in the periphery of the inner wall of the main section disc, holes are formed in the two sides of the outer wall of the tightening holes in a distributed mode, movable beads are movably connected to the inner wall of the tightening holes, movable columns are distributed on one sides of the movable beads, fixing pieces are fixed on the other sides of the movable columns, sealing layers are attached to the inner walls of the fixing pieces, a first miniature electric push rod is fixed on the inner wall of each sealing layer, a connecting column is arranged at one end of the middle of the first miniature electric push rod, a fixed disc is fixed at one end of the connecting column, a secondary section disc is distributed at the, the other end of the tail post is fixed with the direction tail, the outer wall of main festival dish is laminated all around has the fluted disc, and the outer wall of fluted disc has seted up the tooth's socket all around, the outer wall distribution of tooth's socket has the oversheath, the tight hole of waist has been seted up at the top middle part of mounting, and the lower extreme in the tight hole of waist and sealing layer laminating department set up the screw hole, the centre of a circle department of main festival dish is provided with bunch structure, the inner wall of tail post is fixed with the pulling structure.

Preferably, the main joint disc and the mounting cylinder are of a welding integrated structure, and the mounting cylinder and the sealing cover form a detachable structure through external threads.

Preferably, the main joint disc and the auxiliary joint disc form a traction structure through a movable bead, a movable column, a fixing piece, a first miniature electric push rod, a connecting column, a fixed disc and the auxiliary joint disc, and the main joint disc is movably connected with the movable column.

Preferably, the waist holes are distributed along the central line of the fixing piece, and the fixing piece and the sealing layer are mutually attached.

Preferably, the fluted disc and the outer sheath are mutually meshed, and the outer sheath is uniformly sleeved outside the main joint disc and the auxiliary joint disc at equal intervals.

Preferably, the wire harness structure comprises an embedded ring, a compression spring, a limiting disc, a clamping ring, a sliding groove and a limiting column, the compression spring is arranged in the middle of the inner wall of the embedded ring, the outer wall of the compression spring is attached to the limiting disc, the clamping ring is fixed to the other side of the compression spring, the limiting column is fixed to two sides of the outer wall of the clamping ring, and the sliding groove is movably connected to the outer wall of the limiting column.

Preferably, the clamping ring and the embedded ring form an elastic structure through a compression spring, and the clamping ring is distributed in an inward bending arc surface shape.

Preferably, the pulling structure is including second electric putter, tractive quarter butt, tractive stock, side splint, pole setting and loose axle, and second electric putter's the other end distributes and has the tractive quarter butt, one side of tractive quarter butt is fixed with the tractive stock, and one side outer wall welding that the tractive quarter butt was kept away from to the tractive stock has the side splint, the outer wall junction swing joint of tractive quarter butt and tractive stock has the pole setting, and the middle part of pole setting is provided with the loose axle.

Preferably, the traction long rod is distributed in a straight shape between the traction short rods, and the traction short rods and the second electric push rod are vertically distributed.

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

1. according to the mechanical snake, the installation cylinder, the external thread and the sealing cover are arranged, the installation cylinder forms a detachable structure through the external thread and the sealing cover, the main section disc and the installation cylinder are the head positions of the mechanical snake, mechanical equipment such as illumination and monitoring can be installed in the installation cylinder according to actual conditions, specific operation of the mechanical snake can be independently completed, and the sealing cover and the installation cylinder are detachably designed, so that internal overhaul operation of a user can be effectively met.

2. According to the mechanical snake, the main joint disc and the movable column are movably connected, when a user needs to move the mechanical snake, the user can open the first micro electric push rods, the first micro electric push rods pull the connecting column inwards, the connecting column drives the auxiliary joint disc to move towards one side, the auxiliary joint disc at the rear end can be effectively pulled through the combined operation of the plurality of first micro electric push rods, meanwhile, 3 first micro electric push rods are arranged on one side of each auxiliary joint disc, and the 3 first micro electric push rods perform the combined operation, and the auxiliary joint disc can be twisted through the movable ball and the movable column serving as a connecting mechanism, so that the movement effect like a snake is achieved.

3. According to the mechanical snake, the main joint disc, the auxiliary joint disc and the outer sheath are arranged, the outer sheath is uniformly sleeved outside the main joint disc and the auxiliary joint disc at equal intervals, the outer sheath is made of polyethylene materials, the surface of the outer sheath has certain elasticity, the integral structure of the outer sheath is similar to that of a corrugated pipe, the ground can be well grabbed due to the design of the outer sheath, the surface friction coefficient of the mechanical snake is improved, and the outer sheath is in meshed connection with the fluted disc, so that the high connection strength of the connection part of the mechanical snake is guaranteed, and the structure is stable.

4. The invention arranges the binding hole, the embedded ring, the compression spring, the limit disc, the clamping ring, the sliding groove and the limit column, the clamping ring is distributed in an inward bending arc surface shape, the middle part of the main section disc adopts a hollow design, the inner wall of the main section disc can be used for wiring and placing a power supply, and when a plurality of circuits are placed in the middle of the main section disc, the wire harness structure can effectively fix and clamp the line, when a plurality of line pipelines are placed inside the clamping ring, the clamping ring is extruded by pressure to drive the compression spring to contract inwards, and the clamping ring drives the limit post to longitudinally slide along the sliding groove, the sliding groove and the limiting column can effectively position the clamping ring, ensure that the clamping ring has smooth and uniform speed in the sliding process and is not easy to be dislocated, meanwhile, the compression spring rebounds, the clamping ring applies clamping force, and the plurality of line pipelines are clamped and limited.

5. According to the invention, through the arrangement of the bunching structure, the pulling structure, the second electric push rod, the pulling short rod, the pulling long rod, the side clamping plate, the vertical rod and the movable shaft, the pulling short rod and the second electric push rod are vertically distributed, when a user needs a tail post to conduct guiding operation on the guide tail, the user can open the second electric push rod to abut against the pulling short rod, the pulling short rod drives the pulling long rod to rotate clockwise or anticlockwise along the movable shaft, because the pulling long rod is fixedly connected with the guide tail through the side clamping plate, when the pulling long rod swings, the guide tail swings to achieve the effect of guiding the guide tail, the guiding is controlled through the second electric push rod to achieve the possibility of remote control, and the mechanical snake can effectively run.

Drawings

FIG. 1 is a schematic view of the internal structure of a mechanical snake having a moisture resistant structure according to the present invention;

FIG. 2 is a schematic view of the exterior of a mechanical snake having moisture barrier structure of the present invention;

FIG. 3 is a schematic view of a mechanical snake fastener having a moisture barrier structure according to the present invention;

FIG. 4 is a schematic view of the main deck structure of a mechanical snake having a moisture resistant structure of the present invention;

fig. 5 is an enlarged view of a portion of a mechanical snake having a moisture barrier of the present invention shown at a point a in fig. 4.

In the figure: 1. a main panel; 2. mounting the cylinder; 3. an external thread; 4. a sealing cover; 5. a movable bead; 6. a movable post; 7. a fixing member; 8. a sealing layer; 9. a first miniature electric push rod; 10. connecting columns; 11. fixing the disc; 12. an auxiliary panel; 13. a tail pillar; 14. a guide tail; 15. an outer sheath; 16. waist tightening holes; 17. a fluted disc; 18. a threaded hole; 19. a tooth socket; 20. forming a hole; 21. tightening the hole; 2201. an embedded ring; 2202. a compression spring; 2203. a limiting disc; 2204. a clamping ring; 2205. a sliding groove; 2206. a limiting column; 22. a wire harness structure; 23. a pulling structure; 2301. a second electric push rod; 2302. pulling the short rod; 2303. pulling the long rod; 2304. a side clamping plate; 2305. erecting a rod; 2306. a movable shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a mechanical snake with a moisture-proof structure comprises a main section disc 1, a mounting cylinder 2, external threads 3, a sealing cover 4, movable beads 5, a movable column 6, a fixing piece 7, a sealing layer 8, a first miniature electric push rod 9, a connecting column 10, a fixed disc 11, an auxiliary section disc 12, a tail column 13, a guide tail 14, an outer sheath 15, a waist tightening hole 16, a fluted disc 17, a threaded hole 18, a tooth groove 19, a forming hole 20, a tightening hole 21, an embedded ring 2201, a compression spring 2202, a limiting disc 2203, a clamping ring 2204, a sliding groove 2205, a limiting column 2206, a wire bunching structure 22, a pulling structure 23, a second electric push rod 2301, a pulling short rod 2302, a pulling long rod 2303, a side clamping plate 2304, a vertical rod 2305 and a movable shaft 2306, wherein the mounting cylinder 2 is fixed on the outer wall of one side of the main section disc 1, the external threads 3 are arranged on the periphery of the mounting cylinder 2, the sealing cover 4 is connected to the other side of the mounting cylinder 2, and installation section of thick bamboo 2 constitutes detachable construction through external screw thread 3 and sealed lid 4, and main festival dish 1 and installation section of thick bamboo 2 are the head position of this mechanical snake, can install mechanical equipment such as illumination, control according to actual conditions in the installation section of thick bamboo 2, guarantee that this mechanical snake can independently accomplish specific operation to adopt detachable design between its sealed lid 4 and the installation section of thick bamboo 2, can effectively satisfy the user and overhaul the operation to inside.

The periphery of the inner wall of the main section disc 1 is provided with tightening holes 21, two sides of the outer wall of the tightening holes 21 are distributed with opening holes 20, the inner wall of the tightening holes 21 is movably connected with movable beads 5, one side of each movable bead 5 is distributed with a movable column 6, the other side of each movable column 6 is fixed with a fixing piece 7, the inner wall of each fixing piece 7 is attached with a sealing layer 8, the inner wall of each sealing layer 8 is fixed with a first miniature electric push rod 9, one end of the middle part of each first miniature electric push rod 9 is provided with a connecting column 10, one end of each connecting column 10, far away from the corresponding first miniature electric push rod 9, is fixed with a fixed disc 11, the other end of each fixed disc 11 is distributed with an auxiliary section disc 12, the tail end of the auxiliary section disc 12 is fixed with a tail column 13, the main section disc 1 forms a traction structure with the auxiliary section disc 12 through the movable beads 5, the movable columns 6, the fixing pieces 7, the first miniature electric, when the user needs this mechanical snake to remove, the user can be through opening first miniature electric putter 9, first miniature electric putter 9 stimulates spliced pole 10 inwards, spliced pole 10 drives vice festival dish 12 and removes to one side, through a plurality of first miniature electric putter 9 joint work, guarantee that this mechanical snake can effectively remove, every vice festival dish 12 one side sets up 3 first miniature electric putter 9 simultaneously, 3 first miniature electric putter 9 joint work, guarantee can effectively stimulate vice festival dish 12 of rear end, and can guarantee this vice festival dish 12 through activity pearl 5 and activity post 6 and twist as coupling mechanism, reach the removal effect like the snake.

The other end of the tail post 13 is fixed with a guide tail 14, a fluted disc 17 is attached to the periphery of the outer wall of the main joint disc 1, a toothed groove 19 is formed in the periphery of the outer wall of the fluted disc 17, the fluted disc 17 and the outer sheath 15 are mutually meshed, the outer sheath 15 is uniformly sleeved outside the main joint disc 1 and the auxiliary joint disc 12 at equal intervals, the outer sheath 15 is made of polyethylene materials, the surface of the outer sheath has certain elasticity, the integral structure of the outer sheath 15 is similar to that of a corrugated pipe, the ground can be well grabbed by the design of the outer sheath 15, the surface friction coefficient of the mechanical snake is improved, the outer sheath 15 and the fluted disc 17 are in meshed connection, the connection part is high in connection strength and stable in structure, the outer sheath 15 has a good sealing effect, and water is prevented from flowing into the mechanical snake from gaps when the mechanical snake moves on a wet.

Outer wall distribution of tooth's socket 19 has oversheath 15, the tight hole 16 of waist has been seted up at the top middle part of mounting 7, and the lower extreme in the tight hole 16 of waist and the laminating department of sealing layer 8 set up threaded hole 18, the tight hole 16 of waist distributes along the central line department of mounting 7, and laminate each other between mounting 7 and the sealing layer 8, when the user needs to adjust the position of first miniature electric putter 9, the user can be through the screw of unscrewing mounting 7 top, move first miniature electric putter 9, insert the screw in the threaded hole 18 simultaneously, vertically fix first miniature electric putter 9, and mounting 7 adopts I shape mounting 7, this mounting 7 can effectively accomodate fixedly to first miniature electric putter 9.

The center of the main section disc 1 is provided with a wire harness structure 22, the wire harness structure 22 comprises an inner embedded ring 2201, a compression spring 2202, a position-limiting disc 2203, a clamping ring 2204, a sliding groove 2205 and a position-limiting column 2206, the middle part of the inner wall of the inner embedded ring 2201 is provided with the compression spring 2202, the outer wall of the compression spring 2202 is attached to the position-limiting disc 2203, the other side of the compression spring 2202 is fixed with the clamping ring 2204, the two sides of the outer wall of the clamping ring 2204 are fixed with the position-limiting column 2206, the outer wall of the position-limiting column 2206 is movably connected with the sliding groove 2205, the clamping ring 2204 and the inner embedded ring 2201 form an elastic structure through the compression spring 2202, the clamping ring 2204 is distributed in an inward bending arc surface shape, the middle part of the main section disc 1 is designed in a hollow mode, the inner wall of the main section disc 1 can be used for placing a power supply, and when a plurality of lines, when a plurality of line pipes are placed inside the clamping ring 2204, the clamping ring 2204 is squeezed through pressure to drive the compression spring 2202 to contract inwards, the clamping ring 2204 drives the limiting column 2206 to slide longitudinally along the sliding groove 2205, the sliding groove 2205 and the limiting column 2206 can effectively position the clamping ring 2204, the clamping ring 2204 is guaranteed to be smooth at a constant speed in the sliding process, dislocation is not prone to occurring, meanwhile, the compression spring 2202 rebounds, the clamping ring 2204 applies clamping force to clamp and limit the plurality of line pipes.

A pulling structure 23 is fixed on the inner wall of the tail post 13, the pulling structure 23 comprises a second electric push rod 2301, a pulling short rod 2302, a pulling long rod 2303, a side clamping plate 2304, an upright 2305 and a movable shaft 2306, the other end of the second electric push rod 2301 is distributed with the pulling short rod 2302, one side of the pulling short rod 2302 is fixed with the pulling long rod 2303, the outer wall of one side of the pulling long rod 2303 far away from the pulling short rod 2302 is welded with the side clamping plate 2304, the outer wall connection part of the pulling short rod 2302 and the pulling long rod 2303 is movably connected with the upright 2305, the movable shaft 2306 is arranged in the middle of the upright 2305, the pulling long rod 2303 is distributed in a shape like a Chinese character 'yi' between the pulling short rods 2302 and the second electric push rod 2301, when the user needs to guide the tail post 13 to guide the tail 14, the user can open the second electric push rod 2301 and the second electric push rod 2301 to abut against the pulling short rod 2302, lead quarter butt 2302 and drive and lead long pole 2303 and carry out clockwise or anticlockwise rotation along loose axle 2306, because lead long pole 2303 and carry out fixed connection through side splint 2304 with direction tail 14, when leading long pole 2303 takes place to swing, direction tail 14 swings, reaches the effect of direction tail 14 direction, and this direction is controlled through second electric putter 2301, reaches the possibility of far-reaching accuse, guarantees that this mechanical snake can effective operation.

The working principle of the embodiment is as follows: when the mechanical snake with the moisture-proof structure is used, the first miniature electric push rod 9 is opened, the first miniature electric push rod 9 pulls the connecting column 10 inwards, the model of the first miniature electric push rod 9 is YS-NZ100-12A, the connecting column 10 drives the auxiliary joint disc 12 to move towards one side, the mechanical snake is ensured to effectively move through the combined operation of the first miniature electric push rods 9, 3 first miniature electric push rods 9 are arranged on one side of each auxiliary joint disc 12, the combined operation of the 3 first miniature electric push rods 9 is ensured to effectively pull the auxiliary joint disc 12 at the rear end, the auxiliary joint disc 12 can be ensured to twist through the movable bead 5 and the movable column 6 as a connecting mechanism, the moving effect like a snake is achieved, and when a user needs to adjust the position of the first miniature electric push rod 9, the user can screw at the top of the fixing piece 7 by screwing down, the first minitype electric push rod 9 is moved, meanwhile, a screw is inserted into the threaded hole 18, the first minitype electric push rod 9 is fixed longitudinally, in addition, when the user needs to guide the guide tail 14 by the tail post 13, the user can push the short bar 2302 by opening the second electric push rod 2301, and the short bar 2302 drives the long bar 2303 to rotate clockwise or counterclockwise along the movable shaft 2306, since long pulling rod 2303 is fixedly connected with guide tail 14 through side clamping plate 2304, when the long rod 2303 is pulled to swing, the guide tail 14 swings to achieve the effect of guiding the guide tail 14, and finally, a user can install mechanical equipment such as illumination, monitoring and the like according to actual conditions to ensure that the mechanical snake can independently complete specific operation, and adopt detachable design between its sealed lid 4 and the installation section of thick bamboo 2, can effectively satisfy the user and overhaul the operation to inside.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A mechanical snake with moisture-proof structure, comprising a main section disc (1) and a sealing cover (4), characterized in that: an installation cylinder (2) is fixed on the outer wall of one side of the main section disc (1), external threads (3) are arranged on the periphery of the outer wall of the installation cylinder (2), the sealing cover (4) is connected to the other side of the installation cylinder (2), tightening holes (21) are arranged on the periphery of the inner wall of the main section disc (1), opening holes (20) are distributed on two sides of the outer wall of the tightening holes (21), movable beads (5) are movably connected to the inner wall of the tightening holes (21), movable columns (6) are distributed on one sides of the movable beads (5), fixing pieces (7) are fixed on the other sides of the movable columns (6), sealing layers (8) are attached to the inner walls of the fixing pieces (7), a first micro electric push rod (9) is fixed on the inner wall of each sealing layer (8), a connecting column (10) is arranged at one end of the middle of each first micro electric push rod (9), and a fixed disc (11) is fixed at one end, far away from the first, the other end of fixed disk (11) distributes and has vice festival dish (12), and the tail end of vice festival dish (12) is fixed with tail-stock (13), the other end of tail-stock (13) is fixed with direction tail (14), the outer wall of main festival dish (1) is laminated all around has fluted disc (17), and the outer wall of fluted disc (17) has seted up tooth's socket (19) all around, the outer wall distribution of tooth's socket (19) has oversheath (15), tight hole of waist (16) have been seted up at the top middle part of mounting (7), and the lower extreme of the tight hole of waist (16) and sealing layer (8) laminating department set up threaded hole (18), the centre of a circle department of main festival dish (1) is provided with bunch structure (22), the inner wall of tail-stock (13) is fixed with pulling structure (23.

2. A mechanical snake having moisture resistant construction as claimed in claim 1 wherein: the main joint disc (1) and the mounting cylinder (2) are of a welding integrated structure, and the mounting cylinder (2) and the sealing cover (4) form a detachable structure through external threads (3).

3. A mechanical snake having moisture resistant construction as claimed in claim 1 wherein: the main joint disc (1) and the auxiliary joint disc (12) form a traction structure through a movable bead (5), a movable column (6), a fixing piece (7), a first miniature electric push rod (9), a connecting column (10) and a fixed disc (11), and the main joint disc (1) is movably connected with the movable column (6).

4. A mechanical snake having moisture resistant construction as claimed in claim 1 wherein: the waist fastening holes (16) are distributed along the center line of the fixing piece (7), and the fixing piece (7) and the sealing layer (8) are mutually attached.

5. A mechanical snake having moisture resistant construction as claimed in claim 1 wherein: the fluted disc (17) and the outer sheath (15) are mutually meshed, and the outer sheath (15) is uniformly sleeved outside the main joint disc (1) and the auxiliary joint disc (12) at equal intervals.

6. A mechanical snake having moisture resistant construction as claimed in claim 1 wherein: the wire harness structure (22) comprises an inner embedded ring (2201), a compression spring (2202), a limiting disc (2203), a clamping ring (2204), a sliding groove (2205) and a limiting column (2206), wherein the compression spring (2202) is arranged in the middle of the inner wall of the inner embedded ring (2201), the outer wall of the compression spring (2202) is attached to the limiting disc (2203), the clamping ring (2204) is fixed to the other side of the compression spring (2202), the limiting column (2206) is fixed to two sides of the outer wall of the clamping ring (2204), and the sliding groove (2205) is movably connected to the outer wall of the limiting column (2206).

7. A mechanical snake having moisture resistant construction as claimed in claim 6 wherein: the clamping ring (2204) and the embedded ring (2201) form an elastic structure through the compression spring (2202), and the clamping ring (2204) is distributed in an inward bending arc surface shape.

8. A mechanical snake having moisture resistant construction as claimed in claim 1 wherein: pulling structure (23) including second electric putter (2301), tractive quarter butt (2302), tractive stock (2303), side splint (2304), pole setting (2305) and loose axle (2306), and the other end distribution of second electric putter (2301) has tractive quarter butt (2302), one side of tractive quarter butt (2302) is fixed with tractive stock (2303), and one side outer wall welding that tractive quarter butt (2302) was kept away from in tractive stock (2303) has side splint (2304), the outer wall junction swing joint of tractive quarter butt (2302) and tractive stock (2303) has pole setting (2305), and the middle part of pole setting (2305) is provided with loose axle (2306).

9. A mechanical snake having moisture resistant construction as claimed in claim 8 wherein: the long pulling rods (2303) are distributed in a straight line shape through the short pulling rods (2302), and the short pulling rods (2302) and the second electric push rods (2301) are distributed in a vertical shape.