阅读说明：本技术 一种齿轮包装输送分拣装置 (Gear packing conveying and sorting device ) 是由 黄廷波 周智慧 李荫现 龚仁春 张思彬 王勇 姜荣兵 宋金松 张宏祥 方建秋 于 2021-08-20 设计创作，主要内容包括：本发明公开一种齿轮包装输送分拣装置,本发明涉及齿轮分拣设备技术领域,在使用的时候,首先将待分拣的齿轮逐个从安装板内的U型槽内放入,齿轮的两侧被齿轮固定件夹持,同步电机通过传动轮带动传输带转动,在传输带的带动下,向一端移动,当齿轮移动至齿形槽上方的时候,由于齿轮本身重量的作用,齿轮下沉,并与齿形槽相啮合,随后齿轮在齿形槽内转动,假如该被检测的齿轮有盲齿的话,齿轮在转动过程中会产生一个向上跳动的动作,以此来实现不合格齿轮的分拣,无需人工挑拣,极大的降低了人工劳动强度,并能够避免因工作人员视觉疲劳而导致分拣出错的问题。(The invention discloses a gear packaging, conveying and sorting device, which relates to the technical field of gear sorting equipment, when in use, the gears to be sorted are firstly put into the U-shaped grooves in the mounting plate one by one, the two sides of the gears are clamped by the gear fixing pieces, the synchronous motor drives the transmission belt to rotate through the transmission wheel, driven by the transmission belt, the gear moves to one end, when the gear moves to the upper part of the tooth-shaped groove, the gear sinks under the action of the weight of the gear, and is meshed with the tooth-shaped groove, then the gear rotates in the tooth-shaped groove, if the detected gear has blind teeth, the gear can generate an upward jumping action in the rotating process, therefore, the sorting of unqualified gears is realized, manual sorting is not needed, the manual labor intensity is greatly reduced, and the problem of sorting errors caused by visual fatigue of workers can be avoided.)

1. The utility model provides a sorting device is carried to gear packing which characterized in that: comprises a workbench (1), wherein mounting seats (2) are fixedly arranged on two sides above the workbench (1); a gear clamping and transmitting assembly (3) is arranged above each of the two mounting seats (2); a tooth-shaped groove (6) is arranged in the middle of the top of the workbench (1); an open slot (11) is formed in one side of the tooth-shaped groove (6); a gear classification ejection assembly (8) is arranged right below the open slot (11); the gear sorting ejection assembly (8);

the gear classification ejection assembly (8) comprises an ejection block (81), the ejection block (81) is movably connected inside the open slot (11), and a driving rod (82) is fixed below the ejection block (81); the lower end of the driving rod (82) is sleeved in the fixed shell (83) and movably connected, and a fixed shaft (813) is fixed at the lower end of the driving rod (82); the fixed shaft (813) is coaxially provided with a turning arm (811) and a rubber wheel (812); a turntable (88) is arranged below the rubber wheel (812); the rotary disc (88) is fixedly arranged on the driving shaft (87); the driving shaft (87) is matched and connected with an output shaft of a driving motor (86) through a coupler, the driving motor (86) is fixedly arranged on one side of the hanging bracket (85), and the output shaft of the driving motor penetrates through the other side of the hanging bracket (85); the upper end of the hanger (85) is fixed on one side of the fixed shell (83); the upper end of the fixed shell (83) is fixedly arranged at the bottom of the workbench (1) through the top of the mounting rack (84).

2. The gear package transporting and sorting apparatus according to claim 1, wherein: two arc-shaped grooves are formed in the rotary disc (88), and a fixed block (89) is fixedly arranged in one arc-shaped groove through a bolt; a poke rod (810) is fixed at the outer end of the fixed block (89); the outer edge of the rotating disc (88) is also provided with a trapezoidal poking block, and the trapezoidal poking block is positioned on the opposite side of the fixed block (89).

3. The gear package transporting and sorting apparatus according to claim 1, wherein: the turnover arm (811) is sleeved on the fixed shaft (813), a torsion spring is arranged between the turnover arm (811) and the fixed shaft (813), the upper end of the turnover arm (811) is in a hook head shape, and the lower end of the turnover arm (811) is in a 7 shape; the outer side of the fixed shell (83) is provided with a mounting rack (84), one side of the mounting rack (84) close to the turning arm (811) is provided with a raised step, and the raised step is matched with a hook head at the upper end of the turning arm (811).

4. The gear package transporting and sorting apparatus according to claim 1, wherein: a mounting plate (4) is arranged above one end of each of the two gear clamping and transmitting assemblies (3), and a synchronous motor (5) used for driving the gear clamping and transmitting assemblies (3) is arranged above the mounting plate (4); the middle position of the mounting plate (4) is provided with a U-shaped groove convenient for placing a gear.

5. The gear package conveying and sorting apparatus according to claim 4, wherein: two furling plates (9) are arranged below the mounting plate (4), the two furling plates (9) are arranged in a splayed shape, and the two furling plates (9) are positioned between the two gear clamping and transmitting assemblies (3).

6. The gear package transporting and sorting apparatus according to claim 1, wherein: a camera (7) is arranged in the middle of the inner side of the mounting seat (2), and the camera (7) is positioned on one side of the tooth-shaped groove (6); the two sides of the bottom of the workbench (1) are fixedly arranged on the frame body (10).

7. The gear package transporting and sorting apparatus according to claim 1, wherein: the gear clamping and conveying assembly (3) comprises a plurality of driving wheels (31), and the driving wheels (31) are arranged on the mounting base (2) through rotating shafts; a transmission belt (32) is connected to the outer parts of the installation seats (2) in a matching way; the outer side of the transmission belt (32) is provided with a plurality of gear fixing pieces (33) used for clamping during gear transmission.

8. The gear package transporting and sorting apparatus according to claim 7, wherein: the gear fixing piece (33) comprises a fixing shell (34), and a rotating disc (35) is arranged in the fixing shell (34); the rotating shaft is welded on the inner side of the rotating disc (35) and is installed inside the fixed shell (34) through a bearing; the fixed shell (34) is fixed on the outer side of the transmission belt (32) through two clamping springs (36).

9. The gear package transporting and sorting apparatus according to claim 1, wherein: the length of the tooth-shaped grooves (6) is consistent with the length of the involute of the gear to be packaged, namely the number of the tooth-shaped grooves (6) is consistent with the number of the teeth of the gear to be packaged.

Technical Field

The invention relates to the technical field of gear sorting equipment, in particular to a gear packaging, conveying and sorting device.

Background

The gear, one of the most basic parts for transmitting motion and power, is widely applied in the industrial field due to the advantages of high meshing efficiency, low noise, large transmission load and the like. The composite forging of the gear is to place a blank for manufacturing the gear in an extrusion forming mold shell, then perform upsetting treatment and then perform punch forming treatment to obtain the gear.

Gear production finishes the back, need pack the gear with the oiled paper, but the gear probably leads to the gear to produce the condition of blind tooth when producing because of the defect of mould or blank itself in the in-process of production, will sort out unqualified gear for this reason, and traditional manual sorting is inefficient, and intensity of labour is high, for this reason, needs an urgent need for a section can be automatic with the equipment that the gear letter sorting that has the blind tooth comes out.

Disclosure of Invention

In view of the above, the present invention is directed to the defects in the prior art, and a main object of the present invention is to provide a gear packing, conveying and sorting device, so as to solve the problems that after the gear mentioned in the above background is produced, the gear needs to be packed with oiled paper, but during the production process of the gear, because of the defects of the mold or the blank, the gear may generate blind teeth during the production, and therefore, the unqualified gear needs to be sorted out, and the traditional manual sorting efficiency is low and the labor intensity is high.

In order to achieve the purpose, the invention adopts the following technical scheme:

a gear packing, conveying and sorting device comprises a workbench, wherein mounting seats are fixedly mounted on two sides above the workbench; a gear clamping and transmitting assembly is arranged above each of the two mounting seats; a tooth-shaped groove is formed in the middle of the top of the workbench; an open slot is formed in one side of the tooth-shaped groove; a gear classification ejection assembly is arranged right below the open slot; the gear classification ejection assembly;

the gear classification ejection assembly comprises an ejection block, the ejection block is movably connected inside the open slot, and a driving rod is fixed below the ejection block; the lower end of the driving rod is sleeved in the fixed shell and movably connected with the fixed shell, and a fixed shaft is fixed at the lower end of the driving rod; the fixed shaft is coaxially provided with a turnover arm and a rubber wheel; a turntable is arranged below the rubber wheel; the turntable is fixedly arranged on the driving shaft; the driving shaft is matched and connected with an output shaft of a driving motor through a coupler, the driving motor is fixedly arranged on one side of the hanging bracket, and the output shaft of the driving motor penetrates through the other side of the hanging bracket; the upper end of the hanging bracket is fixed on one side of the fixed shell; the upper end of the fixed shell is fixedly arranged at the bottom of the workbench through the top of the mounting rack.

Furthermore, two arc-shaped grooves are formed in the turntable, and a fixed block is fixedly mounted in one arc-shaped groove through a bolt; a poke rod is fixed at the outer end part of the fixed block; the outer edge of the rotary disc is also provided with a trapezoidal poking block, and the trapezoidal poking block is positioned at the opposite side of the fixed block.

Furthermore, the turning arm is sleeved on the fixed shaft, a torsion spring is arranged between the turning arm and the fixed shaft, the upper end of the turning arm is in a hook head shape, and the lower end of the turning arm is in a 7 shape; the outer side of the fixed shell is provided with a mounting frame, one side of the mounting frame, which is close to the turnover arm, is provided with a raised step, and the raised step is matched with a hook head at the upper end of the turnover arm.

Furthermore, an installation plate is arranged above one end of each of the two gear clamping transmission assemblies, and a synchronous motor used for driving the gear clamping transmission assemblies is arranged above the installation plate; the middle position of the mounting plate is provided with a U-shaped groove convenient for placing a gear.

Furthermore, two furling plates are arranged below the mounting plate, the two furling plates are arranged in a splayed shape, and the two furling plates are positioned between the two gear clamping and transmitting assemblies.

Furthermore, a camera is arranged in the middle of the inner side of the mounting seat and is positioned on one side of the tooth-shaped groove; the two sides of the bottom of the workbench are fixedly arranged on the frame body.

Furthermore, the gear clamping and conveying assembly comprises a plurality of driving wheels which are arranged on the mounting seat through rotating shafts; the outer parts of the installation bases are connected with transmission belts in a matching way; the outside of transmission band be equipped with a plurality of gear fixing spare that are used for centre gripping during gear drive.

Furthermore, the gear fixing piece comprises a fixed shell, and a rotating disk is arranged in the fixed shell; the rotating shaft is welded on the inner side of the rotating disc and is arranged in the fixed shell through a bearing; the fixed shell is fixed on the outer side of the transmission belt through two clamping springs.

Furthermore, the length of the tooth-shaped grooves is consistent with the length of the involute of the gear to be packaged, namely the number of the tooth-shaped grooves is consistent with the number of the teeth of the gear to be packaged.

Furthermore, the camera is connected with an industrial personal computer matched with the device for use through a lead, a synchronous motor and a driving motor in the device are also connected with the industrial personal computer through leads, and the industrial personal computer is used for controlling the actions of the synchronous motor and the driving motor.

Compared with the prior art, the invention has obvious advantages and beneficial effects, and specifically, the technical scheme includes that:

1. when the sorting device is used, gears to be sorted are firstly put into the U-shaped grooves in the mounting plate one by one, two sides of the gears are clamped by the gear fixing pieces, the synchronous motor drives the transmission belt to rotate through the transmission wheel, the gears move towards one end under the driving of the transmission belt, when the gears move to the upper side of the tooth-shaped grooves, the gears sink and are meshed with the tooth-shaped grooves under the action of the weight of the gears, then the gears rotate in the tooth-shaped grooves, if the detected gears have blind teeth, the gears can generate an upward jumping action in the rotating process, so that the sorting of unqualified gears is realized, manual picking is not needed, the manual labor intensity is greatly reduced, and the problem of sorting errors caused by visual fatigue of working personnel can be avoided;

2. according to the invention, after the motion of jumping of the gear with the blind teeth is captured by the camera, the camera transmits monitoring information to the industrial personal computer, the industrial personal computer controls the motion of the gear classification ejection assembly, the gear classification ejection assembly can be used for ejecting unqualified gears, and workers take out the unqualified gears, so that the gears are sorted;

3. according to the invention, when the industrial personal computer sends an instruction, the driving motor drives the turntable to rotate through the driving shaft, the shifting block arranged on one side of the turntable jacks up the rubber wheel, then the driving rod moves upwards along the fixed shell, and jacks up unqualified gears through the jacking block, meanwhile, the overturning arm moves upwards and is clamped and fixed with the locking block, so that the driving rod can stop for a moment and cannot fall down instantly, and a worker can take out the driving rod conveniently;

4. according to the invention, after a worker takes out a gear, the turntable rotates, when the poke rod arranged on one side of the fixed block rotates to the position of the turnover arm, the turnover arm is poked, the turnover arm deflects by taking the fixed shaft as a center, the locking between the turnover arm and the locking block is released, the driving rod slides down to the original position, the jacking block is contracted into the open slot, and the qualified gear can pass through conveniently;

5. according to the invention, when the gear fixing piece clamps the gear, the rotating disc is in direct contact with the side face of the gear, and the rotating disc is in rotating connection with the fixed shell, so that the gear can rotate and pass through when moving to the tooth-shaped groove;

6. in the invention, gears with different thicknesses can be clamped through the clamping spring, so that a worker can take off unqualified gears conveniently, and the flexibility is higher;

7. according to the gear transmission device, the two furling plates are arranged below the mounting plate and are arranged in an 'eight' shape, when the gear fixing piece rotates to the outer side of the furling plate, the gear fixing piece is limited by the furling plates, the clamping spring is compressed, a certain distance is reserved between the two opposite gear fixing pieces, the gear is convenient to place, when the gear is placed between the inner sides of the two furling plates, the two opposite gear fixing pieces are separated from the furling plates, the gear is clamped instantly, and transmission is achieved.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic perspective view of a gear packing, conveying and sorting device according to the present invention;

FIG. 2 is a rear view of FIG. 1 of the gear package transport sorter of the present invention;

FIG. 3 is a bottom plan view of FIG. 2 of the gear package transport sorter of the present invention;

FIG. 4 is a schematic view of a portion of the gear package transport sorter of FIG. 1 in accordance with the present invention;

FIG. 5 is a top plan view of FIG. 4 of the gear package transport sorter of the present invention;

FIG. 6 is an enlarged schematic view at A of FIG. 1 of the gear package conveying and sorting apparatus of the present invention;

FIG. 7 is a schematic structural view of a gear sorting and ejecting assembly of the gear packaging, conveying and sorting device of the invention;

FIG. 8 is a rear view of FIG. 7 of the gear package transport sorter of the present invention;

fig. 9 is a bottom view of fig. 8 of the gear package conveying sorter of the present invention.

The reference numbers are as follows:

1. a work table; 2. a mounting seat; 3. a gear clamping transmission assembly; 31. a driving wheel; 32. a conveyor belt; 33. a gear fixing member; 34. fixing the housing; 35. rotating the disc; 36. a clamping spring; 4. mounting a plate; 5. a synchronous motor; 6. a toothed groove; 7. a camera; 8. the gear classification ejection assembly; 81. jacking the block; 82. a drive rod; 83. fixing the housing; 84. a mounting frame; 85. a hanger; 86. a drive motor; 87. a drive shaft; 88. a turntable; 89. a fixed block; 810. a poke rod; 811. a turning arm; 812. a rubber wheel; 813. a fixed shaft; 814. a locking block; 9. folding the plate; 10. a frame body; 11. an open slot.

Detailed Description

Referring to fig. 1 to 9, which show the specific structure of a preferred embodiment of the present invention, a gear packing, conveying and sorting device includes a workbench 1, wherein two sides above the workbench 1 are fixedly installed with mounting seats 2; a gear clamping and transmitting assembly 3 is arranged above each of the two mounting seats 2; a tooth-shaped groove 6 is arranged in the middle of the top of the workbench 1; an open slot 11 is arranged at one side of the tooth-shaped slot 6; a gear classification ejection assembly 8 is arranged right below the open slot 11; the gear sorting ejection assembly 8;

the gear classification ejection assembly 8 comprises an ejection block 81, the ejection block 81 is movably connected inside the open slot 11, and a driving rod 82 is fixed below the ejection block 81; the lower end of the driving rod 82 is sleeved in the fixed shell 83 and movably connected, and a fixed shaft 813 is fixed at the lower end of the driving rod 82; the fixed shaft 813 is coaxially provided with a turning arm 811 and a rubber wheel 812; a turntable 88 is arranged below the rubber wheel 812; the rotating disc 88 is fixedly arranged on the driving shaft 87; the driving shaft 87 is connected with an output shaft of the driving motor 86 in a matching way through a coupling, the driving motor 86 is fixedly arranged on one side of the hanging bracket 85, and the output shaft of the driving motor 86 penetrates through the other side of the hanging bracket 85; the upper end of the hanger 85 is fixed on one side of the fixed shell 83; the upper end of the fixed shell 83 is fixedly arranged at the bottom of the workbench 1 through the top of the mounting rack 84.

Furthermore, two arc-shaped grooves are formed in the turntable 88, and a fixing block 89 is fixedly mounted in one arc-shaped groove through a bolt; a poke rod 810 is fixed at the outer end part of the fixed block 89; the outer edge of the rotating disc 88 is also provided with a trapezoidal poking block which is positioned at the opposite side of the fixed block 89;

the turning arm 811 is sleeved on the fixed shaft 813, a torsion spring is arranged between the turning arm 811 and the fixed shaft 813, the upper end of the turning arm 811 is in a hook shape, and the lower end of the turning arm 811 is in a 7 shape; the outer side of the fixed housing 83 is provided with a mounting bracket 84, and one side of the mounting bracket 84 close to the turning arm 811 is provided with a raised step which is matched with a hook head at the upper end of the turning arm 811.

Specifically, when the industrial personal computer sends an instruction, the driving motor 86 drives the turntable 88 to rotate through the driving shaft 87, the shifting block arranged on one side of the turntable 88 jacks up the rubber wheel 812, then the driving rod 82 moves upwards along the fixed shell 83, and jacks up unqualified gears through the jacking block 81, meanwhile, the turnover arm 811 moves upwards and is clamped and fixed with the locking block 814, so that the driving rod 82 can stop for a moment and cannot fall down instantly, and a worker can take out the gear conveniently;

after the gear is taken out by the worker, the rotating disc 88 rotates, when the poke rod 810 arranged on one side of the fixed block 89 rotates to the overturning arm 811, the overturning arm 811 is poked, the overturning arm 811 deflects by taking the fixed shaft 813 as the center, the locking between the overturning arm 811 and the locking block 814 is released, the driving rod 82 slides downwards to the original position, the jacking block 81 contracts into the open slot 11, and the qualified gear passes through the slot conveniently

Further, a mounting plate 4 is arranged above one end of each of the two gear clamping transmission assemblies 3, and a synchronous motor 5 for driving the gear clamping transmission assemblies 3 is arranged above the mounting plate 4; a U-shaped groove convenient for placing a gear is formed in the middle of the mounting plate 4;

two furling plates 9 are arranged below the mounting plate 4, the two furling plates 9 are arranged in a splayed shape, and the two furling plates 9 are positioned between the two gear clamping and transmitting components 3.

Specifically, when the gear fixing member 33 rotates to the outer side of the furling plate 9, the clamping spring 36 is compressed under the limitation of the furling plate 9, so that a certain distance is reserved between the two opposite gear fixing members 33, which is convenient for the placement of the gear, and when the gear is placed between the inner sides of the two furling plates 9, the two opposite gear fixing members 33 are separated from the furling plate 9, and the gear is instantly clamped and is transferred.

Furthermore, a camera 7 is arranged at the middle position of the inner side of the mounting seat 2, and the camera 7 is positioned at one side of the tooth-shaped groove 6; two sides of the bottom of the workbench 1 are fixedly arranged on the frame body 10; the camera 7 is connected with an industrial personal computer matched with the device for use through a lead, the synchronous motor 5 and the driving motor 86 in the device are also connected with the industrial personal computer through leads, and the industrial personal computer is used for controlling the actions of the synchronous motor 5 and the driving motor 86.

It is specific a bit, when using, at first put into the gear that will wait to sort one by one from the U type inslot in the mounting panel 4, the both sides of gear are by gear mounting 33 centre gripping, synchronous machine 5 drives transmission band 32 through drive wheel 31 and rotates, under the drive of transmission band 32, move to one end, when the gear removes to flute profile 6 top, because the effect of gear weight itself, the gear sinks, and mesh with flute profile 6 mutually, the gear is at flute profile 6 internal rotation afterwards, if the gear that should be detected has the blind tooth, the gear can produce the action of upwards beating at the rotation in-process, thereby realize unqualified gear's letter sorting, need not artifical the picking, very big reduction artifical intensity of labour, and can avoid leading to the problem of sorting mistake because of staff's visual fatigue.

Further, the gear clamping and transmitting assembly 3 comprises a plurality of transmission wheels 31, and the transmission wheels 31 are arranged on the mounting base 2 through rotating shafts; a transmission belt 32 is connected to the outside of the plurality of mounting seats 2 in a matching way; a plurality of gear fixing pieces 33 used for clamping during gear transmission are arranged on the outer side of the transmission belt 32; the gear fixing piece 33 comprises a fixed shell 34, and a rotating disc 35 is arranged inside the fixed shell 34; a rotating shaft is welded on the inner side of the rotating disc 35 and is installed inside the fixed shell 34 through a bearing; the fixed housing 34 is fixed to the outside of the conveyor belt 32 by two clamping springs 36.

In particular, when the gear fixing member 33 clamps the gear, since the rotating disc 35 is in direct contact with the side surface of the gear, and the rotating disc 35 is also in rotational connection with the fixed housing 34, the gear can rotate to pass through when moving to the tooth-shaped groove 6;

through clamping spring 36 can carry out the centre gripping to the gear of different thickness, also be convenient for the staff takes off unqualified gear, have higher flexibility.

Furthermore, the length of the tooth-shaped grooves 6 is consistent with the length of the involute of the gear to be packaged, namely the number of the tooth-shaped grooves 6 is consistent with the number of the teeth of the gear to be packaged.

Particularly, all teeth of the gear are meshed with the tooth-shaped grooves 6, so that the gear can be detected in all directions conveniently.

The working principle of the invention is as follows: when the sorting machine is used, firstly, gears to be sorted are put into a U-shaped groove in a mounting plate 4 one by one, two sides of each gear are clamped by a gear fixing piece 33, a synchronous motor 5 drives a transmission belt 32 to rotate through a transmission wheel 31, the gears move towards one end under the driving of the transmission belt 32, when the gears move to the upper part of a tooth-shaped groove 6, the gears sink and are meshed with the tooth-shaped groove 6 under the action of the weight of the gears, a rotating disc 35 is in direct contact with the side surface of each gear, and the rotating disc 35 is rotationally connected with a fixing shell 34, so that the gears can rotate through the tooth-shaped groove 6 when moving to the tooth-shaped groove 6, and then the gears rotate in the tooth-shaped groove 6, and if the detected gears have blind teeth, the gears can generate an upward jumping action in the rotating process;

after the motion that the gear with the blind teeth jumps is captured by the camera 7, the camera 7 transmits monitoring information to the industrial personal computer, the industrial personal computer controls the motion of the gear classification ejection assembly 8, when the industrial personal computer sends an instruction, the driving motor 86 drives the turntable 88 to rotate through the driving shaft 87, the poking block arranged on one side of the turntable 88 jacks up the rubber wheel 812, then the driving rod 82 moves upwards along the fixed shell 83, and jacks up unqualified gears through the jacking block 81, meanwhile, the overturning arm 811 moves upwards and is clamped and fixed with the locking block 814, so that the driving rod 82 can stop carving, cannot fall down instantly, and is convenient for a worker to take out;

after the gear is taken out by a worker, the rotating disc 88 rotates, when the poking rod 810 arranged on one side of the fixed block 89 rotates to the position of the turning arm 811, the turning arm 811 is poked, the turning arm 811 deflects by taking the fixed shaft 813 as a center, the locking between the turning arm 811 and the locking block 814 is released, the driving rod 82 slides downwards to the original position, and the jacking block 81 is contracted into the open slot 11 so as to facilitate the passing of the qualified gear;

two furling plates 9 are arranged below the mounting plate 4, the two furling plates 9 are arranged in an 'eight' shape, when the gear fixing piece 33 rotates to the outer side of the furling plate 9, the gear fixing piece is limited by the furling plates 9, the clamping spring 36 is compressed, a certain distance is reserved between the two opposite gear fixing pieces 33, the gear can be conveniently placed, when the gear is placed in the middle of the inner sides of the two furling plates 9, the two opposite gear fixing pieces 33 are separated from the furling plates 9, the gear is clamped instantly, and transmission is achieved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.