CN111101842B

CN111101842B - Safe and reliable's gardens are pruned and are stepped on

Info

Publication number: CN111101842B
Application number: CN201911334320.XA
Authority: CN
Inventors: 李志航
Original assignee: Hangzhou Guangzhilin Technology Co ltd
Current assignee: Xiamen Tefang Landscape Engineering Co.,Ltd.
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2021-11-09
Anticipated expiration: 2038-10-31
Also published as: CN109441334B; CN109441334A; CN111101842A

Abstract

The invention discloses a garden trimming ladder which comprises a first connecting frame, a second connecting frame and cross rods arranged on the first connecting frame and the second connecting frame respectively, wherein the first connecting frame and the second connecting frame are respectively divided into two groups, the two groups of first connecting frames and the two groups of second connecting frames are arranged on two sides of the cross rods respectively, the first connecting frame is arranged above the second connecting frame, a connecting seat is arranged at the bottom of the first connecting frame, a first connecting block is arranged at the top of the second connecting frame, and the first connecting block is movably connected to the connecting seat; the mounting box is arranged on one side of the second connecting frame, a mounting cavity is arranged in the mounting box, a first climber and a second climber are arranged in the mounting cavity, and a control assembly used for controlling synchronous motion of the first climber and the second climber is arranged in the mounting cavity.

Description

Safe and reliable's gardens are pruned and are stepped on

This application is a divisional application of the patent application having application number "2018112899810

Application date: 20181031

The applicant: old document label

Technical Field

The invention belongs to the technical field of garden maintenance tools, and particularly relates to a safe and reliable garden trimming ladder.

Background

When the trees in gardens grow redundant branches, gardeners who manage basically hang on the branches or stand on the branches to cut off the branches or trim the branches, so that dangerous situations when trimming the branches occur, and great potential safety hazards exist.

The garden trimming ladder disclosed by the Chinese patent CN104806155A is simple in structure, very convenient to manufacture, assemble and use, convenient to carry, free of tools in the assembling and disassembling processes during use, capable of solving the problems of upright climbing and standing of gardeners managing gardens when branches are trimmed, high in ladder assembling speed during climbing, safe, reliable and convenient to climb; after use, the disassembly, the packaging and the transportation are convenient; the ladder placing plane is not improved in the invention, the land in the garden is usually not flat, the ladder cannot be flatly placed on the bottom surface, the ladder is obliquely placed, the safety of gardeners is greatly threatened, and the ladder cannot be widely used in the garden.

Disclosure of Invention

The invention provides a safe and reliable garden trimming ladder capable of reducing potential safety hazards in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a safe and reliable garden trimming ladder comprises a first connecting frame, a second connecting frame and cross rods respectively arranged on the first connecting frame and the second connecting frame, wherein the first connecting frame and the second connecting frame are respectively divided into two groups, the two groups of first connecting frames and the two groups of second connecting frames are respectively arranged on two sides of the cross rods, the first connecting frame is arranged above the second connecting frame, a connecting seat is arranged at the bottom of the first connecting frame, a first connecting block is arranged at the top of the second connecting frame, and the first connecting block is movably connected to the connecting seat; the method is characterized in that: an installation box is arranged on one side of the second connecting frame, an installation cavity is arranged in the installation box, a first climber and a second climber are arranged in the installation cavity, and a control assembly used for controlling the first climber and the second climber to move synchronously is arranged in the installation cavity; a movable box is arranged on the first connecting frame, a fixed assembly is arranged in the movable box, and a connecting box matched with the fixed assembly is arranged on the second connecting frame; the control assembly comprises a first driving wheel arranged in the mounting cavity, a second driving wheel in driving fit with the first driving wheel, a third driving wheel in driving fit with the first driving wheel and a fourth driving wheel in driving fit with the third driving wheel, the first foot fastener is fixedly connected to the second driving wheel, and the second foot fastener is fixedly connected to the fourth driving wheel; a first connecting rod is arranged on the first driving wheel and penetrates through the installation box, a first movable cavity is arranged in the first connecting rod, a transmission plate is arranged in the first movable cavity, a second connecting rod is arranged on the transmission plate, and the second connecting rod penetrates through the first movable cavity; the inner wall of the top of the first movable cavity is provided with a transmission gear matched with the transmission plate, and the section of the inner wall of the bottom of the first movable cavity is larger than that of the transmission plate; a first limiting plate is arranged on the second connecting rod, a convex block is arranged at the top of the mounting box, and a limiting groove matched with the first limiting plate is arranged on the convex block; grooves are respectively formed in two sides of the installation cavity, an air pressure rod is arranged on the inner wall of each groove, a piston rod of each air pressure rod is movably connected with a first baffle, and the first baffles on the two sides of the installation cavity are respectively contacted with the first climbers and the second climbers; a second movable cavity is arranged in the movable box, a first through hole is arranged in the connecting box, the fixed assembly comprises a third connecting rod penetrating through the second movable cavity, a first limiting rod arranged at the bottom of the third connecting rod and matched with the first through hole, and second limiting plates arranged on the third connecting rod, the number of the second limiting plates is four, every two second limiting plates form a group matched with each other, a connecting spring is arranged on each second limiting plate, and one end of each connecting spring is fixedly connected with the inner wall of the second movable cavity; the bottom of the second connecting frame is provided with a balancing weight, the bottom of the second connecting frame is also provided with a mounting seat, and the mounting seat is rotatably connected with a roller; the second connecting frame is provided with a second connecting block, the mounting box is provided with a connecting groove matched with the second connecting block, the second connecting block is movably connected into the connecting groove, and the side wall of the mounting box is also provided with a second baffle; a second through hole is formed in the second connecting frame, and a fifth limiting plate matched with the installation box penetrates through the second through hole; a push plate is arranged on one side of the fifth limiting plate, and a sixth limiting plate is arranged on the fifth limiting plate; a third movable cavity is formed in the second limiting plate, and a third limiting plate matched with the third movable cavity is arranged on the third connecting rod; and a fourth limiting plate is arranged on the third connecting rod, and a second limiting rod matched with the fourth limiting plate is arranged on the first connecting frame.

The invention has the following advantages: the garden trimming ladder is directly fixed on the trunk through the first foot buckles and the second foot buckles, the garden trimming ladder is fixedly connected with the trunk under the action of the foot buckles, the bottom of the garden trimming ladder is not contacted with the ground, and the garden trimming ladder can be used for various different grounds in a garden, so that the garden trimming ladder can be in a stable state regardless of garden road conditions, and is convenient for gardeners to climb, and trees can be trimmed conveniently; the first climbers and the second climbers are adjusted within a certain range by controlling the control assembly to control the first climbers and the second climbers so as to be suitable for trunks with various thicknesses, the application range of the garden trimming ladder is enlarged, and trees with various thicknesses can be trimmed conveniently; through mutually supporting of first connecting block and connecting seat, make gardens pruning ladder fold when the transport, reduce the height of gardens pruning ladder, be convenient for carry gardens pruning ladder.

Drawings

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

Fig. 2 is a schematic view of the first and second connection frames of the present invention.

Fig. 3 is a schematic structural diagram of the installation box of the invention.

Fig. 4 is a rear view of the mounting box of the present invention.

Fig. 5 is a longitudinal cross-sectional view of the mounting box of the present invention.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is a transverse sectional view of the first installation box of the invention.

Fig. 8 is a transverse sectional view of the second embodiment of the mounting box of the present invention.

Fig. 9 is an exploded view of the securing assembly of the present invention.

Detailed Description

As shown in fig. 1 to 9, a safe and reliable garden trimming ladder comprises a first connecting frame 1, a second connecting frame 2 and cross bars 11 respectively arranged on the first connecting frame 1 and the second connecting frame 2, wherein the first connecting frame 1 and the second connecting frame 2 are respectively provided in two groups, the two groups of the first connecting frame 1 and the two groups of the second connecting frame 2 are respectively arranged on two sides of the cross bars 11, the cross bars are provided in multiple groups, and a complete ladder is formed under the matching of the first connecting frame, the second connecting frame and the cross bars; the first connecting frame 1 is arranged above the second connecting frame 2, the connecting seat 14 is arranged at the bottom of the first connecting frame 1, the first connecting block 26 is arranged at the top of the second connecting frame 2, and the first connecting block 26 is hinged to the connecting seat 14; when the garden trimming ladder is carried, the first connecting frame is rotated around a hinge point of the first connecting block and the connecting seat, so that the first connecting frame is inclined from the upper part of the second connecting frame, the first connecting frame and the second connecting frame are in a side-by-side state, the height of the garden trimming ladder is reduced, and the garden trimming ladder is convenient to carry; a mounting box 4 is arranged on one side of the second connecting frame 2, a mounting cavity 48 is arranged in the mounting box 4, a first climber 41 and a second climber 42 are arranged in the mounting cavity 48, and the first climber and the second climber are climbers in the prior art and are not described again; the inner walls of the first climbers and the second climbers are provided with anti-slip pads made of rubber materials, the friction force between the climbers and the trunk is increased through the anti-slip pads, so that the climbers and the trunk form better matching, and the fixing effect of the garden trimming ladder on the trunk is increased; a control component for controlling the synchronous movement of the first climber 41 and the second climber 42 is arranged in the mounting cavity 48.

When branches on the tops of trees need to be trimmed, the first connecting frame is rotated around the first connecting block, the first connecting frame is rotated to be located at the same straight line position with the second connecting frame, and the garden trimming ladder is in an extending state; the positions of the first climbers and the second climbers are adjusted through the control assembly, so that the first climbers and the second climbers are opened under the action of the control assembly, a trunk can conveniently enter the first climbers and the second climbers, the first climbers and the second climbers are matched with the trunk, after the trunk enters the first climbers and the second climbers, the first climbers and the second climbers can move relatively under the action of the control assembly, the distance between the first climbers and the second climbers is reduced, the first climbers and the second climbers can be better contacted with the tree, one ends of the first climbers and the second climbers are pressed to move downwards under the action of the gravity of the garden ladder, the climbers and the trunk are matched with each other by utilizing the lever principle, the garden trimming ladder is fixed on the trunk, the garden trimming ladder is suitable for various gardens, and the unevenness of the garden trimming ladder caused by the unevenness of the ground is avoided, the reliability of the garden trimming ladder is improved; the garden trimming ladder is directly fixed on the trunk through the first foot buckles and the second foot buckles, the garden trimming ladder is fixedly connected with the trunk under the action of the foot buckles, the bottom of the garden trimming ladder is not contacted with the ground, and the garden trimming ladder can be used for various different grounds in a garden, so that the garden trimming ladder can be in a stable state regardless of garden road conditions, and is convenient for gardeners to climb, and trees can be trimmed conveniently; through the control of control assembly to first climbers and second climbers, make first climbers and second climbers adjust at the certain limit to adapt to the trunk of multiple different thicknesses, increase the application range of ladder is pruned in the gardens, be convenient for prune the trees of multiple different thicknesses.

A movable box 13 is arranged on the first connecting frame 1, a fixed component is arranged in the movable box 13, and a connecting box 25 matched with the fixed component is arranged on the second connecting frame 2; when pruning ladder in the gardens when using, round the tie point of first link block with the linkage, make first link frame and second link frame rotate to same straight line position after, fix the position of first link frame and second link frame through fixed subassembly, promote the cooperation effect of first link frame and second link frame, avoid the gardener to take place to buckle after climbing the gardens and pruning ladder, reduce the incident rate because the ladder causes, promote the security that the ladder was pruned in the gardens used.

The control assembly comprises a first driving wheel 420 arranged in the mounting cavity 48, a second driving wheel 430 in transmission fit with the first driving wheel 420, a third driving wheel 450 in transmission fit with the first driving wheel 420 and a fourth driving wheel 440 in transmission fit with the third driving wheel 450, the first foot fastener 41 is fixedly connected to the second driving wheel 430, and the second foot fastener 42 is fixedly connected to the fourth driving wheel 440; a fixing plate 4401 is arranged on the fourth driving wheel, the fixing plate is in contact with the third driving wheel, the third driving wheel is fixed through the fixing plate, and the fixing effect of the third driving wheel and the installation cavity is improved; play excessive effect through the third drive wheel, make the second drive wheel the same with the direction of rotation of fourth drive wheel to make first climbers and second climbers do the motion in opposite directions, be convenient for adjust the distance of first climbers and second climbers, promote the application scope of gardens trimming ladder.

A first connecting rod 410 is arranged on the first driving wheel 420, the first connecting rod 410 is arranged in the installation box 4 in a penetrating manner, a first movable cavity 4101 is arranged in the first connecting rod 410, a driving plate 494 is arranged in the first movable cavity 4101, a second connecting rod 49 is arranged on the driving plate 494, and the second connecting rod 49 is arranged in the first movable cavity 4101 in a penetrating manner; a connecting plate 493 is arranged at the top of the second connecting rod, and the second connecting rod is convenient to operate through the connecting plate; the inner wall of the top of the first movable cavity 4101 is provided with a transmission gear 4102 matched with the transmission plate 494, the section of the inner wall of the bottom of the first movable cavity 4101 is larger than that of the transmission plate 494, and the transmission plate can freely rotate at the bottom of the first movable cavity; the second connecting rod 49 is provided with a first limiting plate 491, the top of the installation box 4 is provided with a lug 45, and the lug 45 is provided with a limiting groove 451 matched with the first limiting plate 491.

When the garden trimming ladder is used, the connecting plate is pulled, the second connecting rod is driven to move from the bottom of the first movable cavity to the top of the first movable cavity under the action of the connecting plate, the transmission plate is matched with the transmission teeth on the inner wall of the first movable cavity, the second connecting rod drives the first connecting rod to rotate together under the mutual matching of the transmission plate and the transmission teeth, the first connecting rod drives the first transmission wheel to rotate, the first transmission wheel drives the second transmission wheel and the fourth transmission wheel to rotate under the action of the first transmission wheel, so that the first foot buckle and the second foot buckle move relatively, and the first foot buckle and the second foot buckle are opened to enable a trunk to enter the first foot buckle and the second foot buckle; after the trunk enters the first climbers and the second climbers, the second connecting rod is rotated reversely, the second connecting rod drives the first driving wheel to rotate reversely, the first climbers and the second climbers are close to each other under the action of the first driving wheel, so that the inner walls of the first climbers and the second climbers are in contact with the surface of the trunk and are in closer fit with the trunk, the fixing effect of the trunk on the climbers is improved, and the garden trimming ladder is stably fixed on the trunk; when the positions of the first climbers and the second climbers are fixed, the second connecting rod is pushed downwards to enable the second connecting rod to push the transmission plate to enter the bottom of the first movable cavity, the first limiting plate is contacted with the top surfaces of the convex blocks, the connecting plate is rotated to drive the transmission plate to rotate, the connecting plate is pushed downwards after the first limiting plate moves to the position corresponding to the limiting groove, the first limiting plate is embedded into the limiting groove, the second connecting rod is limited through the mutual matching of the first limiting plate and the limiting groove, and the phenomenon that the climbers move when matched with the trunk to enable the first transmission wheel to rotate to influence the fixing effect of the trunk and the climbers is avoided; first limiting plate and lug can be made for the magnetic material that magnetism was inhaled mutually, under the magnetic force effect of first limiting plate and lug, increases the cooperation effect of first limiting plate and spacing groove, make better and the spacing groove formation cooperation of first limiting plate, avoid the climbers to throw off the cooperation with the trunk when the ladder is pruned in the gardens uses, promote the reliability that the ladder was pruned in the gardens used.

Grooves 460 are respectively formed in two sides of the installation cavity 48, an air pressure rod 47 is arranged on the inner wall of each groove 460, a piston rod of each air pressure rod 47 is hinged to a first baffle 471, and the first baffles 471 on the two sides of the installation cavity 48 are respectively in contact with the first foot buckle 41 and the second foot buckle 42; the groove is a reserved space for the movement of the first climbers and the second climbers, so that the first climbers and the second climbers are prevented from colliding with the inner wall of the mounting cavity during movement; a switch of the air pressure rod penetrates through the installation box, and the air pressure rod is a product in the prior art and is not described again; through atmospheric pressure stick and first baffle to first climbers and second climbers play supporting role, mutually support with the second connecting rod and play fixed action to the climbers, form fixed cooperation back at climbers and trunk and fix the climbers, take place not hard up when preventing that climbers and trunk from contacting, ensure the security of gardens pruning ladder.

A second movable cavity 131 is arranged in the movable box 13, a first through hole is arranged in the connecting box 25, the fixing component comprises a third connecting rod 3 penetrating through the second movable cavity 131, a first limiting rod 32 arranged at the bottom of the third connecting rod 3 and matched with the first through hole, and a second limiting plate 34 arranged on the third connecting rod 3, a connecting spring 35 is arranged on the second limiting plate 34, one end of the connecting spring 35 is fixedly connected with the inner wall of the second movable cavity 131, and the second limiting plate and the second movable cavity are connected with each other through the connecting spring; after first link and second link rotate to being in same straight line, promote the third connecting rod, make the third connecting rod move down along second activity chamber, under the effect of third connecting rod, promote first gag lever post and enter into in the first through-hole, under the mutually supporting of first through-hole and first gag lever post, play the fixed action to first link and second link, avoid first link and second link to take place to buckle when using, promote the reliability that the ladder was pruned in the gardens used.

A third movable cavity 341 is formed in the second limiting plate 34, a third limiting plate 33 matched with the third movable cavity 341 is arranged on the third connecting rod 3, the third limiting plate can rotate in the third movable cavity, and the third limiting plate cannot be separated from the third movable cavity; a fourth limiting plate 31 is arranged on the third connecting rod 3, four second limiting rods 12 matched with the fourth limiting plate 31 are arranged on the first connecting frame 1, and every two second limiting rods form a group matched with each other; after the garden trimming ladder is used, the third connecting rod is pushed upwards to enable the first limiting rod to be separated from the first through hole, the third connecting rod is continuously pushed upwards to enable the fourth limiting plate to move to be above the two groups of second limiting rods, the fourth limiting plate is rotated to enable the bottom of the fourth limiting plate to be in contact with the second limiting rods, and the fourth limiting plate is supported under the mutual matching of the fourth limiting plate and the second limiting rods, so that the first limiting rod is located above the first through hole, and the first connecting frame is convenient to operate; rotate first link through being connected of first connecting block and connecting seat, make first link rotate second link one side, reduce the height of gardens trimming ladder, be convenient for carry gardens trimming ladder.

The bottom of the second connecting frame 2 is provided with a balancing weight 21 which can be made of metal; the bottom of the second connecting frame 2 is also provided with a mounting seat 22, and a roller 23 is rotatably connected to the mounting seat 22; after the climbers and the trunk are mutually matched, under the gravity of the balancing weight and the garden trimming ladder, pressure is generated on one ends of the climbers, so that the climbers and the trunk are matched, the garden trimming ladder is fixed, and the garden trimming ladder is fixed on the trunk, so that branches at high positions can be trimmed by gardeners; the garden trimming ladder has the advantages that the counterweight block is used for providing gravity for one end of the garden trimming ladder when a garden is not climbed onto the garden trimming ladder, so that the matching effect of the garden trimming ladder and a trunk is improved; through the setting of gyro wheel, avoid because the setting of balancing weight increases the weight of gardens pruning ladder and cause the inconvenience of gardens pruning ladder transport, make the transport of gardens pruning ladder become more convenient, the use of shifting of gardens pruning ladder of being convenient for.

A second connecting block 27 is arranged on the second connecting frame 2, a connecting groove 43 matched with the second connecting block 27 is arranged on the installation box 4, the second connecting block 27 is hinged in the connecting groove 43, and a second baffle 44 is further arranged on the side wall of the installation box 4; a second through hole is formed in the second connecting frame 2, and a fifth limiting plate 24 matched with the installation box 4 penetrates through the second through hole; a push plate 241 is arranged on one side of the fifth limiting plate, so that the fifth limiting plate can be operated conveniently through the push plate, and the fifth limiting plate can be pushed to move conveniently in the second through hole; the fifth limiting plate is provided with a sixth limiting plate 242, the fifth limiting plate is prevented from falling out of the second through hole through the sixth limiting plate, and the connecting effect of the fifth limiting plate and the second through hole is ensured; when the garden trimming ladder is carried, the mounting box is rotated through the hinge joint of the second connecting block and the connecting groove, so that the top surface of the mounting box is contacted with the second connecting frame, the space occupied by the garden trimming ladder is reduced, and the garden trimming ladder is convenient to carry; when the garden trimming ladder is used, the mounting box is rotated downwards to rotate around a hinge point of the second connecting block and the connecting groove, the mounting box cannot rotate all the time under the action of the second baffle plate, the mounting box stops after being perpendicular to the second connecting frame, then the push plate is pushed to push the fifth limiting plate out of the second through hole, the fifth limiting plate is in contact with the surface of the mounting box, the mounting box is fixed through the fifth limiting plate, and the mounting box is prevented from being turned upwards in the use process of the garden trimming ladder; through mutually supporting of second baffle and fifth limiting plate, play the fixed action to the install bin, make the gardens prune the ladder when using the install bin be in fixed position on, promote the support effect that the ladder was pruned in the gardens, provide the guarantee for the safety of gardener.

Claims

1. A safe and reliable garden trimming ladder comprises a first connecting frame (1), a second connecting frame (2) and cross rods (11) respectively arranged on the first connecting frame (1) and the second connecting frame (2), wherein the first connecting frame (1) and the second connecting frame (2) are respectively divided into two groups, the two groups of first connecting frames (1) and the two groups of second connecting frames (2) are respectively arranged on two sides of the cross rods (11), the first connecting frame (1) is arranged above the second connecting frame (2), a connecting seat (14) is arranged at the bottom of the first connecting frame (1), a first connecting block (26) is arranged at the top of the second connecting frame (2), and the first connecting block (26) is movably connected to the connecting seat (14); the method is characterized in that: an installation box (4) is arranged on one side of the second connecting frame (2), an installation cavity (48) is arranged in the installation box (4), a first climber (41) and a second climber (42) are arranged in the installation cavity (48), and a control assembly for controlling the first climber (41) and the second climber (42) to synchronously move is arranged in the installation cavity (48); a movable box (13) is arranged on the first connecting frame (1), a fixed component is arranged in the movable box (13), and a connecting box (25) matched with the fixed component is arranged on the second connecting frame (2); the control assembly comprises a first driving wheel (420) arranged in the mounting cavity (48), a second driving wheel (430) in transmission fit with the first driving wheel (420), a third driving wheel (450) in transmission fit with the first driving wheel (420), and a fourth driving wheel (440) in transmission fit with the third driving wheel (450), the first foot fastener (41) is fixedly connected to the second driving wheel (430), and the second foot fastener (42) is fixedly connected to the fourth driving wheel (440); a first connecting rod (410) is arranged on the first driving wheel (420), the first connecting rod (410) penetrates through the installation box (4), a first movable cavity (4101) is arranged in the first connecting rod (410), a driving plate (494) is arranged in the first movable cavity (4101), a second connecting rod (49) is arranged on the driving plate (494), and the second connecting rod (49) penetrates through the first movable cavity (4101); the inner wall of the top of the first movable cavity (4101) is provided with a transmission gear (4102) matched with the transmission plate (494), and the section of the inner wall of the bottom of the first movable cavity (4101) is larger than that of the transmission plate (494); a first limiting plate (491) is arranged on the second connecting rod (49), a convex block (45) is arranged at the top of the installation box (4), and a limiting groove (451) matched with the first limiting plate (491) is arranged on the convex block (45); grooves (460) are respectively formed in two sides of the installation cavity (48), an air pressure rod (47) is arranged on the inner wall of each groove (460), a piston rod of each air pressure rod (47) is movably connected with a first baffle (471), and the first baffles (471) on the two sides of the installation cavity (48) are respectively in contact with the first climbers (41) and the second climbers (42); a second movable cavity (131) is arranged in the movable box (13), a first through hole is arranged in the connecting box (25), the fixing component comprises a third connecting rod (3) penetrating through the second movable cavity (131), a first limiting rod (32) arranged at the bottom of the third connecting rod (3) and matched with the first through hole, and a second limiting plate (34) arranged on the third connecting rod (3), a connecting spring (35) is arranged on the second limiting plate (34), and one end of the connecting spring (35) is fixedly connected with the inner wall of the second movable cavity (131); a balancing weight (21) is arranged at the bottom of the second connecting frame (2), a mounting seat (22) is further arranged at the bottom of the second connecting frame (2), and a roller (23) is rotatably connected onto the mounting seat (22); a second connecting block (27) is arranged on the second connecting frame (2), a connecting groove (43) matched with the second connecting block (27) is arranged on the installation box (4), the second connecting block (27) is movably connected into the connecting groove (43), and a second baffle (44) is further arranged on the side wall of the installation box (4); a second through hole is formed in the second connecting frame (2), and a fifth limiting plate (24) matched with the installation box (4) penetrates through the second through hole; a push plate (241) is arranged on one side of the fifth limiting plate (24), and a sixth limiting plate (242) is arranged on the fifth limiting plate (24); a third movable cavity (341) is arranged in the second limit plate (34), and a third limit plate (33) matched with the third movable cavity (341) is arranged on the third connecting rod (3); be equipped with fourth limiting plate (31) on third connecting rod (3), be equipped with on first link (1) with fourth limiting plate (31) matched with second gag lever post (12), second gag lever post (12) are four, and every two second gag lever posts (12) form a set of mutually supporting.