CN113044467A

CN113044467A - Basin type article carrier with multiple sections fitting and adapting to shapes

Info

Publication number: CN113044467A
Application number: CN202110393094.3A
Authority: CN
Inventors: 谢仁心
Original assignee: Hangzhou Wangxin Environmental Protection Technology Co ltd
Current assignee: Hangzhou Wangxin Environmental Protection Technology Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-06-29

Abstract

The invention belongs to the field of carrying, and discloses a basin type article carrier with multiple sections of fitting adaptive shapes, which comprises a supporting block, wherein two fixing plates are symmetrically arranged on the left side of the supporting block from top to bottom, two roller shafts are symmetrically arranged on the left and right sides of the two fixing plates, which are far away from each other, and rollers are rotatably sleeved on the two roller shafts.

Description

Basin type article carrier with multiple sections fitting and adapting to shapes

Technical Field

The invention belongs to the field of carrying, and particularly relates to a basin type article carrier with multiple sections of fitting and adapting shapes.

Background

At present, the existing moving mode of large-scale basin objects (such as large-scale flowerpots and some carrying basins used in factories) is mainly that two persons directly grab the edge of the large-scale basin for moving, so that the edge of the large-scale basin is smooth and is not easy to grab in the moving process; and when directly grasping basin edge and moving, not only the arm of force is short and is consuming strength, it is inconvenient to move the personnel moreover and be close to too near walking, though current basin class handling device has certain laborsaving effect, but it is known that present basin outward appearance is various, and the basin of current technique transport is too single, can not carry the basin of different radians, consequently, need to wait to design a basin class carrier that can carry to the basin of different radians and square basin urgently.

Disclosure of Invention

The invention provides a flowerpot carrier which can carry flowerpots with different radians and square flowerpots in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a basin type article carrier with multiple sections of fitting adaptive shapes comprises a supporting block, wherein two fixing plates are symmetrically arranged on the left side of the supporting block from top to bottom;

the two clamping mechanisms are symmetrically arranged and arranged above the two fixing plates, and are used for clamping basins in different shapes;

the supporting mechanisms are arranged symmetrically and are arranged below the two clamping mechanisms respectively, and the supporting mechanisms are used for supporting the basin.

Preferably, two roller shafts are symmetrically arranged on the left side and the right side of the two fixing plates far away from each other, and each roller shaft is rotatably sleeved with a roller.

Preferably, the clamping mechanism comprises a first electromagnetic groove arranged in the first electromagnetic block, the first electromagnetic groove is fixedly provided with the first electromagnetic block, the upper end surface of the first electromagnetic groove is provided with two first electromagnetic sliding blocks which are symmetrical front and back in a sliding way, the upper end surface of each first electromagnetic sliding block is fixedly provided with a vertical moving block, the upper part of the right end surface of each vertical moving block is fixedly provided with a push handle, each vertical moving block is provided with a second electromagnetic groove, a second electromagnetic block is fixedly arranged in each second electromagnetic groove, the second electromagnetic groove is internally provided with a second electromagnetic sliding block which is connected with the second electromagnetic block in a sliding mode, the left side of the second electromagnetic sliding block is fixedly provided with an electromagnetic connecting block, a plurality of first grooves are formed in the electromagnetic connecting block, and each first groove is provided with a clamping assembly in a sliding mode.

Preferably, the clamping assembly comprises a sliding rack slidably disposed in the first groove, a first fixed block is fixedly disposed on one side of the sliding rack close to the supporting block, a telescopic spring is fixedly disposed between one side of the first fixed block close to the electromagnetic connecting block and the electromagnetic connecting block, a rotating block is disposed at one end of the sliding rack close to the horizontal center line of the supporting block, a rotating groove is formed in the rotating block, a first shaft is rotatably disposed between the front side wall and the rear side wall of the rotating groove, a sliding rack is sleeved on the first shaft, a first torsion spring is disposed between the sliding rack and the rear side wall of the rotating groove, a second groove is formed in the rotating block, a first sliding groove is formed between the front side surface and the rear side surface of the second groove, a second sliding block is slidably disposed in the first sliding groove, and a rubber block is sleeved on the two second sliding blocks, the turning block is provided with two bilaterally symmetrical spring grooves, a first rod is slidably arranged in each spring groove, a second rod is fixedly arranged at one end, close to the horizontal central line of the supporting block, of each first rod, the second rod is abutted against one end, far away from the horizontal central line of the supporting block, of the rubber block, a first spring is fixedly arranged between the first rod and the bottom of the spring groove, a second spring is fixedly arranged between one end, far away from the horizontal central line of the supporting block, of the rubber block and the bottom of the second groove, a second sliding groove is formed in one side, close to each other, of each spring groove, a second rod is fixedly arranged on one side, close to each other, of each first rod, the second rods slide in the second sliding grooves, a first rack is fixedly arranged at one end, close to each other, of each second rods, and a first gear shaft is rotatably arranged between the front side and the rear side of each second, the rear portion cover of first gear shaft is equipped with first one-way bearing, fixed cover is equipped with the second gear on the first one-way bearing, the anterior cover of first gear shaft be equipped with first gear of first rack toothing, the fixed third pole that is provided with two bilateral symmetry of tank bottom in second groove, two one side slip that the third pole was kept away from each other is provided with the second rack, two the up end of second rack with the rubber piece is kept away from one side butt of supporting shoe horizontal center line, the second rack with the second gear meshing.

Preferably, a third groove is formed in the upper side wall of each first groove, a second shaft is rotatably arranged between the left side wall and the right side wall of each third groove, a third gear meshed with the sliding rack is sleeved on each second shaft, a ratchet wheel is sleeved on each second shaft, the ratchet wheels are positioned on the right side of the third gear and are fixedly connected with the third gear, a torsion spring is fixedly arranged between the right side wall of each ratchet wheel and the side wall of the third groove, a first through hole is arranged on the upper side wall of the third groove, a limiting rod is arranged in the first through hole in a sliding manner, the upper end surface of the electromagnetic connecting block is provided with a pull rod, the lower end surface of the pull rod is abutted against the upper end surface of the electromagnetic connecting block, the limiting rod extends upwards to penetrate through the pull rod, a fourth rod is fixedly arranged on the upper end face of the limiting rod, and a compression spring is fixedly arranged between the fourth rod and the pull rod.

Preferably, the supporting mechanism is including fixed setting the telescopic link of keeping away from one side each other at two electromagnetism connecting blocks, every the telescopic link is kept away from the fixed annular piece that is provided with of one end of electromagnetism connecting block, every the fixed first slider that is provided with on the inner ring side of annular piece, the fourth groove has been seted up to the fixed plate, the second through-hole has been seted up to the fourth groove, it is provided with the backup pad to slide in the second through-hole, the lower terminal surface in fourth groove rotates and is provided with the threaded rod, fixed cover is equipped with the one-way bearing of second on the threaded rod, the last cover of one-way bearing of second be equipped with backup pad meshed fourth gear, first slider with thread groove butt on the threaded.

In summary, the invention has the following advantages:

1. the device has simple structure, the clamping mechanism can be adjusted according to different shapes of the basin, and the stress of each contact surface can be the same.

2. The supporting mechanism can lift the basin and simultaneously deepen the supporting plate at the bottom, and then the basin is placed on the supporting plate to reduce the stress of each supporting point.

Drawings

FIG. 1 is a cross-sectional view of a multi-segmented conformable shape basin product carrier in accordance with an exemplary embodiment of the present invention;

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a cross-sectional view of a portion of the structure of FIG. 2 taken along line A-A;

FIG. 4 is an enlarged view of a portion of FIG. 1 at I;

FIG. 5 is an enlarged view of a portion of FIG. 4 at B-B;

FIG. 6 is an enlarged view of a portion of FIG. 2 at C-C;

fig. 7 is a cross-sectional view taken at ii in fig. 1.

In the figure, the support block 10; a vertical moving block 11; a second electromagnet block 12; a second electromagnetic slider 13; an electromagnetic connection block 14; a sliding rack 15; a fixed plate 16; a roller shaft 17; a roller 18; a support plate 19; a telescopic rod 20; a ring block 21; a threaded rod 22; a first slider 23; a turning block 24; a rotation groove 25; a spring groove 26; a first spring 27; a first lever 28; a second lever 29; a rubber block 30; a second lever 31; a first rack 32; a first gear shaft 33; a first gear 34; a second spring 35; a second rack 36; a second slider 37; a third lever 38; a second groove 39; a first shaft 40; the second gear 41; a first one-way bearing 42; a third groove 43; a second shaft 44; a ratchet wheel 45; a third gear 46; a pull rod 47; a stopper rod 48; a third spring 49; a fourth bar 50; a fourth groove 51; a fourth gear 52; a second one-way bearing 54; a push handle 55; a second electromagnetic slot 56; a first electromagnetic slider 57; a first electromagnet block 58.

Detailed Description

As shown in fig. 1, the multi-section basin article carrier with the fitting adaptive shape comprises a multi-section basin article carrier with the fitting adaptive shape, and comprises a supporting block 10, wherein two fixing plates 16 are symmetrically arranged on the left side of the supporting block 10 from top to bottom;

the clamping mechanisms A01 and A01 are symmetrically arranged, the clamping mechanisms A01 are arranged above the two fixing plates 16, and the clamping mechanisms A01 are used for clamping basins in different shapes;

the pot clamping device comprises two supporting mechanisms A02, two supporting mechanisms A02 are symmetrically arranged, two supporting mechanisms A02 are respectively arranged below two clamping mechanisms A01, and the supporting mechanisms A02 are used for supporting a pot.

Referring to fig. 1-7, two roller shafts 17 are symmetrically arranged on the side of the two fixing plates 16 away from each other, and a roller 18 is rotatably sleeved on each roller shaft 17.

Referring to fig. 1 to 7, the clamping mechanism a01 includes a first electromagnetic groove formed in a first electromagnetic block 58, the first electromagnetic block 58 is fixedly disposed in the first electromagnetic groove, two first electromagnetic sliders 57 symmetrical front and back are slidably disposed on an upper end surface of the first electromagnetic groove, a vertical moving block 11 is fixedly disposed on an upper end surface of each first electromagnetic slider 57, a pushing handle 55 is fixedly disposed on an upper portion of a right end surface of each vertical moving block 11, a second electromagnetic groove 56 is formed in each vertical moving block 11, a second electromagnetic block 12 is fixedly disposed in each second electromagnetic groove 56, a second electromagnetic slider 13 slidably connected with the second electromagnetic block 12 is disposed in each second electromagnetic groove 56, an electromagnetic connecting block 14 is fixedly disposed on a left side of each second electromagnetic slider 13, a plurality of first grooves are formed in each electromagnetic connecting block 14, and a clamping assembly is slidably disposed in each first groove.

Referring to fig. 1-7, the clamping assembly includes a sliding rack 15 slidably disposed in a first groove, a first fixed block is fixedly disposed on a side of the sliding rack 15 close to the supporting block 10, an expansion spring is fixedly disposed between a side of the first fixed block close to the electromagnetic connecting block 14 and the electromagnetic connecting block 14, a rotating block 24 is disposed at an end of the sliding rack 15 close to a horizontal center line of the supporting block 10, the rotating block 24 is provided with a rotating groove 25, a first shaft 40 is rotatably disposed between front and rear side walls of the rotating groove 25, the first shaft 40 is sleeved with the sliding rack 15, a first torsion spring is disposed between the sliding rack 15 and the rear side wall of the rotating groove 25, the rotating block 24 is provided with a second groove 39, a first sliding groove is disposed between front and rear side surfaces of the second groove 39, a second sliding block 37 is slidably disposed in the first sliding groove, a rubber block 30 is sleeved on the two second sliding blocks 37, the rotating, a first rod 28 is slidably arranged in each spring groove 26, a second rod 29 is fixedly arranged at one end of each first rod 28 close to the horizontal central line of the supporting block 10, the second rod 29 is abutted against one end of the rubber block 30 far away from the horizontal central line of the supporting block 10, a first spring 27 is fixedly arranged between the first rod 28 and the groove bottom of the spring groove 26, a second spring 35 is fixedly arranged between one end of the rubber block 30 far away from the horizontal central line of the supporting block 10 and the groove bottom of the second groove 39, a second sliding groove is formed at one side of the two spring grooves 26 close to each other, a second rod 31 is fixedly arranged at one side of the two first rods 28 close to each other, the second rod 31 slides in the second sliding groove, a first rack 32 is fixedly arranged at one end of the two second rods 31 close to each other, a first gear shaft 33 is rotatably arranged between the front side and the rear side of the second groove 39, and a first one-, the first one-way bearing 42 is fixedly sleeved with a second gear 41, the front part of the first gear shaft 33 is sleeved with a first gear 34 meshed with the first rack 32, the bottom of the second groove 39 is fixedly provided with two bilaterally symmetrical third rods 38, one side, away from each other, of each of the two third rods 38 is provided with a second rack 36 in a sliding manner, the upper end faces of the two second racks 36 are abutted to one side, away from the horizontal central line of the supporting block 10, of the rubber block 30, and the second rack 36 is meshed with the second gear 41.

Referring to fig. 1 to 7, a third groove 43 is formed in an upper side wall of each first groove, a second shaft 44 is rotatably arranged between a left side wall and a right side wall of each third groove 43, a third gear 46 meshed with the sliding rack 15 is sleeved on each second shaft 44, a ratchet 45 is sleeved on each second shaft 44, the ratchet 45 is located on the right side of the third gear 46 and fixedly connected with the third gear 46, a torsion spring is fixedly arranged between the right side wall of each ratchet 45 and the side wall of the third groove 43, a first through hole is formed in the upper side wall of each third groove 43, a limiting rod 48 is slidably arranged in the first through hole, a pull rod 47 is arranged on an upper end face of the electromagnetic connecting block 14, a lower end face of the pull rod 47 abuts against an upper end face of four rods of the electromagnetic connecting block 14, the limiting rod 48 extends upwards to penetrate through the pull rod 47, a fourth rod 50 is fixedly arranged on the upper end face of the limiting rod 48, and a compression spring.

Referring to fig. 1-7, the supporting mechanism a02 includes a telescopic rod 20 fixedly disposed on one side of two electromagnetic connection blocks 14 away from each other, one end of each telescopic rod 20 away from the electromagnetic connection block 14 is fixedly provided with a ring block 21, a first slider 23 is fixedly disposed on the inner ring side surface of each ring block 21, a fourth groove 51 is formed in the fixing plate 16, a second through hole is formed in the fourth groove 51, a supporting plate 19 is slidably disposed in the second through hole, a threaded rod 22 is rotatably disposed on the lower end surface of the fourth groove 51, a second one-way bearing 54 is fixedly disposed on the threaded rod 22, a fourth gear 52 meshed with the supporting plate 19 is sleeved on the second one-way bearing 54, and the first slider 23 abuts against the threaded groove on the threaded rod 22.

The working principle of the basin type article carrier with the multi-section fit adaptive shape provided by the embodiment of the invention is as follows:

when the device is used, the two first electromagnetic sliding blocks 57 are controlled to be away from each other so as to drive the two vertical moving blocks 11 to be away from each other, the two vertical moving blocks 11 drive the two electromagnetic connecting blocks 14 to be away from each other, then the pushing handle 55 is pushed to drive the whole device to move forwards, so that the basin is positioned between the two fixing plates 16, then the second electromagnetic sliding blocks 13 are controlled to be close to each other so as to enable the rubber blocks 30 to be abutted against the basin, at the moment, the rotating blocks 24 can rotate for a certain angle, the rubber blocks 30 can generate certain deformation when being abutted against the outer surface of the basin due to the fact that the rubber blocks 30 are made of elastic rubber blocks, the deformation generated when each rubber block 30 is abutted against the outer surface of the basin can be within the deformation range of the rubber blocks 30, the rubber blocks 30 move in the horizontal line direction away from the center of the supporting block 10 when being abutted against the basin, so that the rotating blocks 24 drive the sliding, the sliding rack 15 drives the first fixed block to move so as to stretch the telescopic spring, the rubber block 30 is tightly attached to the side wall of the basin by the sliding rack 15 under the elastic force of the telescopic spring, the sliding rack 15 drives the ratchet wheel 45 to rotate through the third gear 46, at the moment, the torsional spring stores the force, the sliding rack 15 cannot rotate reversely because the ratchet wheel 45 cannot rotate reversely due to the arrangement of the limiting rod 48, the basin can be clamped tightly, when the rubber block 30 sinks towards one side close to the second spring 35, the second spring 35 is compressed, so as to drive the second rack 36 to move downwards, due to the arrangement of the first one-way bearing 42, the first one-way bearing 42 cannot drive the first gear shaft 33 to rotate, when the two second electromagnetic sliders 13 continue to move towards the basin position, the pressure of the abutting joint of the second rod 29 and the basin side wall is overlarge, and simultaneously drives the second rod 29 to move towards one side close to the sliding rack 15 so as to drive the first rod, further compressing the first spring 27, the first rod 28 moves to a side close to the sliding rack 15 to drive the rubber block 30 to move, the rubber block 30 drives the first gear 34 to rotate so as to drive the first one-way bearing 42 and the second gear 41 to rotate through the first gear shaft 33, the second gear 41 drives the second rack 36 to move upwards so as to support the middle part of the rubber block 30 and enable the middle part of the rubber block 30 to bear the force on the side wall of the basin, thereby effectively preventing uneven force on each part, controlling the second electromagnetic slider 13 to move forwards to lift up the basin when clamping the basin, the second electromagnetic slider 13 drives the electromagnetic connecting block 14 to move forwards so as to drive the telescopic rod 20 to move upwards and drive the annular block 21 to move forwards through the telescopic rod 20 when clamping the basin, the annular block 21 drives the first slider 23 to move forwards, the first slider 23 abuts against the thread groove to drive the threaded rod 22 to rotate so as to drive the two supporting plates 19 to approach each other through the second one-way, at this time, the second electromagnetic sliding block 13 is controlled to move backwards to place the basin on the two supporting plates 19 to share the gravity of the basin, when the basin is carried, the pull rod 47 is pulled upwards to release the limit of the ratchet wheel 45, then the torsion spring is reset to drive the sliding rack 15 to return to the original position, then the two supporting plates 19 are pulled back to the positions far away from each other, and due to the arrangement of the second one-way bearing 54, the second one-way bearing 54 cannot drive the fourth gear 52 to rotate.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be regarded as falling within the protection scope of the patent of the present invention.

Claims

1. The utility model provides a basin class article carrier of multistage laminating adaptation shape, includes supporting shoe (10), its characterized in that: two fixing plates (16) are symmetrically arranged on the left side of the supporting block (10) up and down;

two clamping mechanisms (A01), the two clamping mechanisms (A01) are symmetrically arranged, the two clamping mechanisms (A01) are arranged above the two fixing plates (16), and the clamping mechanisms (A01) are used for clamping basins of different shapes;

two supporting mechanisms (A02), two supporting mechanisms (A02) are symmetrically arranged, two supporting mechanisms (A02) are respectively arranged below two clamping mechanisms (A01), and the supporting mechanisms (A02) are used for supporting the basin.

2. The multi-segment conformable shape basin product carrier of claim 1, further comprising: two one side bilateral symmetry that fixed plate (16) kept away from each other is provided with two gyro wheel axles (17), every it is equipped with gyro wheel (18) to rotate the cover on gyro wheel axle (17).

3. The multi-segment conformable shape basin product carrier of claim 1, further comprising: the clamping mechanism (A01) comprises a first electromagnetic groove arranged in the first electromagnetic block (58), the first electromagnetic block (58) is fixedly arranged in the first electromagnetic groove, two first electromagnetic sliding blocks (57) which are symmetrical front and back are arranged on the upper end face of the first electromagnetic groove in a sliding manner, a vertical moving block (11) is fixedly arranged on the upper end face of each first electromagnetic sliding block (57), a pushing handle (55) is fixedly arranged on the upper portion of the right end face of each vertical moving block (11), a second electromagnetic groove (56) is formed in each vertical moving block (11), a second electromagnetic block (12) is fixedly arranged in each second electromagnetic groove (56), a second electromagnetic sliding block (13) which is connected with the second electromagnetic block (12) in a sliding manner is arranged in each second electromagnetic groove (56), and an electromagnetic connecting block (14) is fixedly arranged on the left side of each second electromagnetic sliding block (13), a plurality of first grooves are formed in each electromagnetic connecting block (14), and each first groove is provided with a clamping assembly in a sliding mode.

4. The multi-segment conformable shape basin product carrier of claim 3, wherein: the clamping component comprises a sliding rack (15) which is arranged in the first groove in a sliding mode, a first fixed block is fixedly arranged on one side, close to the supporting block (10), of the sliding rack (15), a telescopic spring is fixedly arranged between one side, close to the electromagnetic connecting block (14), of the first fixed block and the electromagnetic connecting block (14), a rotating block (24) is arranged at one end, close to the horizontal central line of the supporting block (10), of the sliding rack (15), a rotating groove (25) is formed in the rotating block (24), a first shaft (40) is rotatably arranged between the front side wall and the rear side wall of the rotating groove (25), the sliding rack (15) is sleeved on the first shaft (40), a first torsion spring is arranged between the sliding rack (15) and the rear side wall of the rotating groove (25), and a second groove (39) is formed in the rotating block (24), a first sliding groove is formed between the front side face and the rear side face of the second groove (39), a second sliding block (37) is arranged in the first sliding groove in a sliding mode, and a rubber block (30) is sleeved on the second sliding block (37).

5. The multi-segment conformable shape basin product carrier of claim 4, wherein: the turning block (24) is provided with two bilaterally symmetrical spring grooves (26), a first rod (28) is arranged in each spring groove (26) in a sliding mode, one end, close to the horizontal central line of the supporting block (10), of each first rod (28) is fixedly provided with a second rod (29), the second rod (29) is abutted to one end, far away from the horizontal central line of the supporting block (10), of the rubber block (30), a first spring (27) is fixedly arranged between the first rod (28) and the groove bottom of the spring groove (26), a second spring (35) is fixedly arranged between one end, far away from the horizontal central line of the supporting block (10), of the rubber block (30) and the groove bottom of the second groove (39), a second sliding groove is formed in one side, close to each other, of the two spring grooves (26), and a second rod (31) is fixedly arranged on one side, close to each other, of the two first rods (28), the second rod (31) slides in the second sliding groove, two first racks (32) are fixedly arranged at one ends, close to each other, of the second rods (31), a first gear shaft (33) is rotatably arranged between the front side and the rear side of the second groove (39), a first one-way bearing (42) is sleeved at the rear part of the first gear shaft (33), a second gear (41) is fixedly sleeved on the first one-way bearing (42), a first gear (34) meshed with the first rack (32) is sleeved at the front part of the first gear shaft (33), two third rods (38) which are bilaterally symmetrical are fixedly arranged at the groove bottom of the second groove (39), two second racks (36) are slidably arranged at one sides, far away from each other, of the two third rods (38), and the upper end faces of the second racks (36) are abutted to one sides, far away from the horizontal center line of the supporting block (10), of the rubber block (30), the second rack (36) is engaged with the second gear (41).

6. The multi-segment conformable shape basin product carrier of claim 5, wherein: every third groove (43) has all been seted up to the last lateral wall in first groove, every it is provided with second shaft (44) to rotate between the lateral wall about third groove (43), every the cover is equipped with on second shaft (44) with third gear (46) of sliding rack (15) meshing, every the cover is equipped with ratchet (45) on second shaft (44), ratchet (45) are located the right side of third gear (46) and with third gear (46) fixed connection, every the right side wall of ratchet (45) with fixedly be provided with the torsional spring between the lateral wall of third groove (43), first through-hole has been seted up to the last lateral wall in third groove (43), it is provided with gag lever post (48) to slide in the first through-hole, the up end of electromagnetism connecting block (14) is provided with pull rod (47), the lower terminal surface of pull rod (47) with the up end butt of electromagnetism connecting block (14), the limiting rod (48) extends upwards to penetrate through the pull rod (47), a fourth rod (50) is fixedly arranged on the upper end face of the limiting rod (48), and a compression spring is fixedly arranged between the fourth rod (50) and the pull rod (47).

7. The multi-segment conformable shape basin product carrier of claim 1, further comprising: the supporting mechanism (A02) comprises telescopic rods (20) fixedly arranged on one sides of two electromagnetic connecting blocks (14) far away from each other, one end of each telescopic rod (20) far away from the electromagnetic connecting blocks (14) is fixedly provided with a ring block (21), the inner ring side surface of each ring block (21) is fixedly provided with a first sliding block (23), the fixing plate (16) is provided with a fourth groove (51), the fourth groove (51) is provided with a second through hole, a support plate (19) is arranged in the second through hole in a sliding manner, a threaded rod (22) is rotationally arranged on the lower end surface of the fourth groove (51), a second one-way bearing (54) is fixedly sleeved on the threaded rod (22), a fourth gear (52) meshed with the supporting plate (19) is sleeved on the second one-way bearing (54), the first sliding block (23) is abutted with a thread groove on the threaded rod (22).