CN114148390B

CN114148390B - Tool transfer device for subway construction

Info

Publication number: CN114148390B
Application number: CN202111542392.0A
Authority: CN
Inventors: 孙文志; 王德明; 马超; 郭金龙; 郭景生; 杨伟庆; 王庆柱; 邱忠委
Original assignee: China Rail Way No9 Group No2 Engineering Co ltd
Current assignee: China Rail Way No9 Group No2 Engineering Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2023-05-12
Anticipated expiration: 2041-12-14
Also published as: CN114148390A

Abstract

The invention discloses a tool transferring device for subway construction, which relates to the field of subway construction and comprises a bottom plate, wherein the left side of the upper surface of the bottom plate is fixedly connected with the bottom surface of a placing frame. According to the invention, the lifting mechanism is connected with the bottom plate, when the device is used for storing and transferring tools with larger volumes and heavier weights, a user firstly places the tools on the first conveyor belt, then the electric push rod is controlled by the switch to push the mounting plate to move up and down to correspond to the corresponding placing plate, the first gear is meshed with the second gear, then the user uses the first driving roller and the first conveyor belt to convey the tools to the corresponding placing plate through the work of the switch control motor, and the problem that the existing tool transfer device for subway construction is not convenient for workers to carry and place the tools on the transfer device, and is not convenient for workers to position and fix the tools is solved, so that the tools easily shake and fall off on the transfer device in the process of transferring the tools.

Description

Tool transfer device for subway construction

Technical Field

The invention relates to a transfer device, in particular to a transfer device for subway construction tools.

Background

The subway is a rapid, large-traffic, electrically-towed rail traffic built in a city. The train runs on the totally-enclosed line, the line located in the central urban area is basically arranged in an underground tunnel, the line outside the central urban area is generally arranged on a viaduct or the ground, the subway is an urban rail transit system which covers various underground and overground road rights of the urban area and has special high density and high transportation capacity, and when the subway is built for construction, a transfer device is usually required to be used for transferring some tools in a construction site.

At present, when the tool transfer device for subway construction is used, the tool transfer device for subway construction has some defects and shortcomings, and the specific parts needing improvement are as follows:

1. the existing tool transfer devices for subway construction do not have an auxiliary carrying function, so that when workers use the existing transfer devices to transfer tools with heavy weight, the tools are inconvenient to be carried up and placed on the transfer devices by the workers;

2. and current transfer device mostly does not possess the fixed function of location, consequently rocks easily and drops impaired on transfer device at transfer instrument in-process instrument.

Disclosure of Invention

The invention aims to provide a tool transfer device for subway construction, which solves the problems that the existing tool transfer device for subway construction, which is proposed in the prior art, is not provided with an auxiliary conveying function, so that when a worker uses the existing transfer device to transfer tools with heavy weight, the worker is inconvenient to lift and place the tools on the transfer device, and the existing transfer device is not provided with a positioning and fixing function, so that the tools are easy to shake, drop and damage on the transfer device in the tool transfer process.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a tool transfer device for subway construction, includes the bottom plate, bottom plate upper surface left side and the bottom surface fixed connection of rack, fixedly connected with a plurality of placers on the rack inner wall, it is a plurality of all be provided with positioning mechanism on the placer, bottom plate upper surface right side is provided with lifts the mechanism, the equal fixedly connected with universal wheel in bottom plate bottom surface four corners department, surface fixedly connected with switch before the rack, the switch input is connected with battery output electricity, battery fixed connection is on bottom plate upper surface right side.

As a preferable technical scheme of the invention, the lifting mechanism comprises a mounting plate, the front side and the rear side of the bottom surface of the mounting plate are respectively and fixedly connected with the upper ends of two electric push rods, the bottom ends of the two electric push rods are fixedly connected to the upper surface of the bottom plate, and the input ends of the two electric push rods are electrically connected with the output ends of the switch.

As a preferable technical scheme of the invention, the upper surface of the mounting plate is provided with a groove, the inner walls of the front side and the rear side of the groove are movably connected with two ends of a plurality of driving rollers, the driving rollers are all in transmission connection with the same conveyor belt, the rear side of the driving roller on the leftmost side is fixedly connected with a gear I, the front end of the driving roller on the leftmost side penetrates through the front surface of the mounting plate through the rolling bearing and is fixedly connected with a motor output shaft, the motor is fixedly connected on the upper surface of the mounting seat, the rear side of the mounting seat is fixedly connected with the front surface of the mounting plate, and the input end of the motor is electrically connected with the output end of the switch.

As a preferable technical scheme of the invention, the plurality of placing mechanisms comprise placing plates, the upper surfaces of the placing plates are provided with placing grooves, the inner walls of the front side and the rear side of the placing grooves are movably connected with two ends of a plurality of driving rollers through rolling bearings, the driving rollers are in driving connection with the same conveying belt, and the rear side of the right-most driving roller is fixedly connected with a gear III.

As a preferable technical scheme of the invention, the third gear is in meshed connection with the second gear, the second gear is fixedly connected to the fixed shaft, two ends of the fixed shaft are respectively and movably connected to inner walls on the front side and the rear side of the mounting groove through rolling bearings, the mounting groove is formed in the right side face of the placing plate, the right side face of the placing plate is communicated with the mounting groove in a penetrating manner through the mounting groove, and one of the second gears is in meshed connection with the first gear.

As an optimized technical scheme of the invention, the positioning mechanisms comprise limiting plates, the limiting plates are movably connected in the accommodating grooves, the accommodating grooves are formed in the right side of the upper surface of the accommodating plate, the left side surface and the right side surface of the limiting plates are fixedly connected with sliding blocks, the two sliding blocks are respectively and slidably connected in two sliding grooves, and the two sliding grooves are respectively formed in the left inner wall and the right inner wall of the accommodating grooves.

As a preferable technical scheme of the invention, the front side and the rear side of the upper surface of the limiting plate are respectively provided with a connecting groove, connecting plates are movably connected in the two connecting grooves, the upper surfaces of the two connecting plates are respectively fixedly connected with a fixing rod, the upper ends of the two fixing rods respectively penetrate through two notches and extend to the upper side of the limiting plate, the two notches are respectively arranged in the upper surface of the limiting plate, the upper surfaces of the two fixing rods are respectively movably connected with a hanging ring through a rolling bearing, and one end of a rope is fixedly connected with the two hanging rings.

As a preferable technical scheme of the invention, two ropes respectively pass through two pulleys and are fixedly connected to the right side surface of a push plate, the two pulleys are fixedly connected to the bottom surface of a plate placed above, the two pulleys at the uppermost side are fixedly connected to the inner wall at the upper side of a placing frame, the left side surface of the push plate is fixedly connected with the right end of a telescopic rod, the left end of the telescopic rod is fixedly connected with the left inner wall of the placing frame, a spring is sleeved on the telescopic rod, and two ends of the spring are respectively fixedly connected to the left side inner wall of the placing frame and the left side surface of the push plate.

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

1. according to the invention, the lifting mechanism is connected with the bottom plate, when the device is used for storing and transferring tools with larger volume and heavier weight, a user firstly places the tools on the first conveyor belt, then the electric push rod is controlled by the switch to push the mounting plate to move up and down to correspond to the corresponding placing plate, the first gear is meshed with the second gear, then the user controls the motor to work through the switch to convey the tools to the corresponding placing plate by using the first driving roller and the first conveyor belt, so that the problem that workers are inconvenient to lift the tools to be placed on the transferring mechanism for transferring when the tools are heavier is avoided, and the lifting mechanism is used for improving the convenience of the device and reducing the labor capacity of workers.

2. According to the invention, the placement mechanism is connected with the placement frame, when the electric push rod is utilized to move the mounting plate to enable the first gear to be meshed with the second gear, the motor drives the first gear to be meshed with the second gear to drive the fixed shaft to rotate when the driving roller is driven by the motor to rotate, and the driving belt is driven by the transmission of the second gear and the third gear to rotate when the fixed shaft rotates to convey the tool to the left side of the placement plate, so that the tool is placed on the left side of the placement plate by utilizing the movement of the second belt to avoid the tool from falling and being damaged from the placement plate, and the stability of the placement mechanism for storing the tool is improved by utilizing the second driving roller, the second belt, the third gear, the second gear and the fixed shaft.

3. According to the invention, the positioning mechanism is arranged, when the second conveyor belt drives the tool to move leftwards, the tool pushes the push plate to move leftwards, the telescopic rod and the spring are extruded when the push plate moves leftwards, so that the spring generates elasticity, the limit plate is pulled to move upwards by the rope when the push plate moves leftwards, and the motor is stopped when the limit plate drives the sliding block to move to the uppermost end of the sliding groove, and at the moment, the tool is clamped and fixed between the limit plate and the push plate by utilizing the elasticity of the spring to clamp and fix the tool, so that the tool is prevented from sliding, colliding and damaging on the placing plate when the tool is moved and transported by utilizing the device, and the protection effect of the device on the tool is further improved.

Drawings

FIG. 1 is a schematic elevational view of the present invention;

FIG. 2 is a schematic cross-sectional elevation view of the present invention;

FIG. 3 is a schematic cross-sectional view of a lifting mechanism according to the present invention;

FIG. 4 is a schematic cross-sectional view of a placement mechanism according to the present invention;

FIG. 5 is a schematic view of an A-amp configuration of the present invention;

fig. 6 is an enlarged view of the B-section of the present invention.

In the figure: 1 bottom plate, 2 rack, 3 universal wheels, 4 battery, 5 lifting mechanism, 51 mounting panel, 52 recess, 53 driving roller one, 54 conveyer belt one, 55 electric putter, 56 gear one, 6 positioning mechanism, 61 limiting plate, 62 rope, 63 pulley, 64 push pedal, 65 spring, 66 telescopic link, 67 spout, 68 slider, 69 storage tank, 610 notch, 611 rings, 612 dead lever, 613 spread groove, 614 connecting plate, 7 placing mechanism, 71 placing plate, 72 placing groove, 73 driving roller two, 74 conveyer belt two, 75 mounting groove, 76 fixed axle, 77 gear two, 78 gear three, 8 switch, 9 motor.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the invention provides a technical scheme of a transferring device for subway construction, which comprises the following steps: comprises a bottom plate 1, the left side of the upper surface of the bottom plate 1 is fixedly connected with the bottom surface of a placing frame 2, a plurality of placing mechanisms 7 are fixedly connected to the inner wall of the placing frame 2, positioning mechanisms 6 are arranged on the placing mechanisms 7, lifting mechanisms 5 are arranged on the right side of the upper surface of the bottom plate 1, universal wheels 3 are fixedly connected to four corners of the bottom surface of the bottom plate 1, the universal wheels 3 are arranged at the four corners of the bottom surface of the bottom plate 1, so that a user can conveniently move the device by using the universal wheels 3, and then the device is used for moving and transferring tools, a switch 8 is fixedly connected to the front surface of the placing frame 2, the input end of the switch 8 is electrically connected with the output end of a storage battery 4, the storage battery 4 is fixedly connected to the right side of the upper surface of the bottom plate 1, the lifting mechanisms 5 comprise a mounting plate 51, the front side and the rear side of the bottom surface of the mounting plate 51 are respectively fixedly connected with the upper ends of two electric push rods 55, the bottom ends of the two electric push rods 55 are fixedly connected to the upper surface of the bottom plate 1, the mounting plate 51 is connected with the bottom plate 1 by arranging the electric push rods 55, so that the mounting plate 51 and tools on the mounting plate 51 are driven to move up and down by utilizing the expansion and contraction of the electric push rods 55, and then some tools with heavy weight are supported and gathered to the height of the corresponding placing plate 71, the input ends of the two electric push rods 55 are electrically connected with the output ends of the switch 8, the upper surface of the mounting plate 51 is provided with the groove 52, the front side inner wall and the rear side inner wall of the groove 52 are movably connected with the two ends of a plurality of driving rollers 53 through rolling bearings, the driving rollers 53 are in driving connection with the same conveyor belt 54, the rear side of the leftmost driving roller 53 is fixedly connected with a gear 56, the front end of the leftmost driving roller 53 passes through the front surface of the mounting plate 51 through the rolling bearings and is fixedly connected with the output shaft of the motor 9, the groove 52, the driving roller 53 and the conveyor belt 54 are arranged on the mounting plate 51, when the device is used for storing and transferring tools with larger volumes and heavier weights, a user firstly places the tools on the first conveyor belt 54, then controls the motor 9 to work through the switch 8, and utilizes the first driving roller 53 and the first conveyor belt 54 to convey the tools to the corresponding placing plate 71, the motor 9 is fixedly connected to the upper surface of the mounting seat, the rear side surface of the mounting seat is fixedly connected with the front surface of the mounting plate 51, the input end of the motor 9 is electrically connected with the output end of the switch 8, the plurality of placing mechanisms 7 respectively comprise the placing plate 71, the upper surface of the placing plate 71 is provided with a placing groove 72, the inner walls of the front side and the rear side of the placing groove 72 are movably connected with the two ends of the second driving rollers 73 through rolling bearings, the second driving rollers 73 are in transmission connection with the same second conveyor belt 74, the rear side of the second right-most driving roller 73 is fixedly connected with a third gear 78, the third gear 78 is in meshed connection with the second gear 77, the second gear 77 is fixedly connected to the fixed shaft 76, the third gear 78 is arranged on the rightmost driving roller 73, and the second gear 77 is meshed with the first gear 56 and the third gear 78 to drive the second driving roller 73 and the second conveying belt 74 to rotate through the meshed transmission of the first gear 56, the second gear 77 and the third gear 78 when the motor 9 drives the first driving roller 53 to rotate, so that the second conveying belt 74 is utilized to move the tool to place the tool on the left side of the placing plate 71 to avoid the tool from falling and being damaged from the placing plate 71, two ends of the fixed shaft 76 are respectively movably connected on the inner walls of the front side and the rear side of the mounting groove 75 through rolling bearings, the mounting groove 75 is arranged on the right side surface of the placing plate 71, the right side surface of the placing plate 71 is communicated with the mounting groove 75 through the mounting groove 75, one of the second gear 77 is meshed with the first gear 56, the plurality of positioning mechanisms 6 comprise limiting plates 61, the limiting plate 61 is movably connected in the containing groove 69, the containing groove 69 is arranged on the right side of the upper surface of the containing groove 71, the left side and the right side of the upper surface of the limiting plate 61 are fixedly connected with the sliding blocks 68, the two sliding blocks 68 are respectively and slidably connected in the two sliding grooves 67, the sliding blocks 68 are arranged on the limiting plate 61, and are slidably connected in the sliding grooves 67 on the inner wall of the containing groove 69, so that the stability of the limiting plate 61 when the limiting plate 61 moves up and down is improved by utilizing the connection of the sliding blocks 68 and the sliding grooves 67, simultaneously, the limiting plate 61 is prevented from being separated from the containing groove 69 to affect the fixing effect of the tool, the two sliding grooves 67 are respectively arranged on the left side and the right side inner wall of the containing groove 69, the front side and the rear side of the upper surface of the limiting plate 61 are respectively provided with the connecting grooves 613, the connecting plates 614 are movably connected in the two connecting grooves 613, the connecting grooves 614 are fixedly connected in the two sides of the connecting grooves 614, the connecting rods 612 are fixedly connected in the connecting rods 612 by fixing the connecting rods 614 on the upper side of the connecting rods 612 by fixing the connecting rods 612, the connecting rods 612 are respectively arranged on the upper side of the connecting rods 612, the connecting rods 612 are fixedly connected on the upper side of the connecting rods 612 by utilizing the connecting rods 614 and the connecting rods 614 to the connecting rods 614, and then avoid making the rope 62 on rings 611 produce torsion when rotating connecting plate 614 and make the connecting plate 614 rotate and break away from spread groove 613 subsequently, all fixedly connected with rope 62 one end on two rings 611, two ropes 62 pass two pulleys 63 respectively and fixed connection is on push pedal 64 right flank, two pulleys 63 all fixed connection is on the top place the board 71 bottom surface, two pulleys 63 all fixed connection in rack 2 upside inner wall, push pedal 64 left surface and telescopic link 66 right-hand member fixed connection, telescopic link 66 left end and rack 62 left side inner wall fixed connection, telescopic link 66 has cup jointed spring 65, be connected push pedal 64 and rack 62 through setting up telescopic link 66 and spring 65, thereby utilize telescopic link 66 and spring 65 to fix push pedal 64, and can utilize the spring 65 elasticity with the fixed centre gripping of instrument between push pedal 64 and limiting plate 61 after motor 9 stops rotating, simultaneously, can utilize spring 65 elasticity to make push pedal 64 reset after taking off the instrument from place board 71, spring 65 both ends are respectively fixed connection is on rack 2 left side inner wall and push pedal 64 left side.

The invention comprises the following operation steps:

when the device is used for storing and transferring some heavy tools, a user firstly moves the device to a proper position by using the universal wheel 3, then the user places the tools to be transferred on the first conveyor belt 54, at the moment, the user controls the two electric push rods 55 to extend and push the mounting plate 51 to move upwards through the switch 8, when the mounting plate 51 moves to correspond to the placing plate 71 at the proper position, the electric push rods 55 are stopped to extend when the gear one 56 is meshed with the corresponding gear two 77, then the user controls the motor 9 to work through the switch 8 to drive the first driving roller 53 to rotate with the first conveyor belt 54, the tool is driven to move leftwards to move the tools onto the second conveyor belt 74 when the first conveyor belt 54 rotates, the driving roller one 53 at the leftmost side drives the fixed shaft 76 to rotate through the meshed transmission of the gear one 56 and the gear two 77, and the driving roller two 73 and the second conveyor belt 74 are driven to rotate through the transmission of the gear two 77 and the transmission of the gear three 78 when the fixed shaft 76 rotates to move the tools to the left side of the placing plate 71;

when the second conveyor belt 74 drives the tool to move leftwards, the push plate 64 is pushed to move leftwards, the spring 65 and the telescopic rod 66 are extruded when the push plate 64 moves leftwards, the spring 65 generates elastic force, the limiting plate 61 is pulled to move upwards through the rope 62 when the push plate 64 moves leftwards, the motor 9 is stopped when the limiting plate 61 drives the sliding block 68 to move to the uppermost end of the sliding groove 67, at the moment, the spring 65 pushes the push plate 64 and the tool to move rightwards, the tool is clamped between the push plate 64 and the limiting plate 61, the tool is fixed, and then a user moves the device through the universal wheel 3;

when the tool is removed, the user firstly uses the electric push rod 55 to correspond the mounting plate 51 to the corresponding placing plate 71, then the user rotates the connecting plate 614 to correspond to the notch 610, then pulls the fixing rod 612 upwards to take out the connecting plate 614 from the notch 610, at the moment, the limiting plate 61 falls into the storage groove 69 under the action of gravity, then the user controls the output shaft of the motor 9 to rotate reversely through the switch 8 to enable the first conveyor belt 54 and the second conveyor belt 74 to rotate rightwards, at the moment, the tool is moved onto the first conveyor belt 54 by using the rotation of the first conveyor belt 54 and the second conveyor belt 74, and then the user stops the motor 9 and controls the electric push rod 55 to retract to remove the tool.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is merely for convenience in describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and defined otherwise, for example, it may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a subway construction is with instrument transfer device, includes bottom plate (1), its characterized in that: the left side of the upper surface of the base plate (1) is fixedly connected with the bottom surface of the placement frame (2), a plurality of placement mechanisms (7) are fixedly connected to the inner wall of the placement frame (2), a plurality of positioning mechanisms (6) are arranged on the placement mechanisms (7), lifting mechanisms (5) are arranged on the right side of the upper surface of the base plate (1), universal wheels (3) are fixedly connected to four corners of the bottom surface of the base plate (1), a switch (8) is fixedly connected to the front surface of the placement frame (2), the input end of the switch (8) is electrically connected with the output end of the storage battery (4), and the storage battery (4) is fixedly connected to the right side of the upper surface of the base plate (1);

the positioning mechanisms (6) comprise limiting plates (61), the limiting plates (61) are movably connected in storage grooves (69), the storage grooves (69) are formed in the right side of the upper surface of the placement plate (71), sliding blocks (68) are fixedly connected to the left side surface and the right side surface of the limiting plates (61), the two sliding blocks (68) are respectively and slidably connected in two sliding grooves (67), and the two sliding grooves (67) are respectively formed in the left inner wall and the right inner wall of the storage grooves (69);

connecting grooves (613) are formed in the front side and the rear side of the upper surface of the limiting plate (61), connecting plates (614) are movably connected in the connecting grooves (613), fixing rods (612) are fixedly connected to the upper surfaces of the connecting plates (614), the upper ends of the fixing rods (612) respectively penetrate through two notches (610) and extend to the upper side of the limiting plate (61), the two notches (610) are formed in the upper surface of the limiting plate (61), hanging rings (611) are movably connected to the upper surfaces of the fixing rods (612) through rolling bearings, and one ends of ropes (62) are fixedly connected to the two hanging rings (611);

the two ropes (62) respectively penetrate through the two pulleys (63) and are fixedly connected to the right side face of the push plate (64), the two pulleys (63) are fixedly connected to the bottom face of the upper placement plate (71), the two uppermost pulleys (63) are fixedly connected to the inner wall of the upper side of the placement frame (2), the left side face of the push plate (64) is fixedly connected to the right end of the telescopic rod (66), the left end of the telescopic rod (66) is fixedly connected to the left inner wall of the placement frame (62), the telescopic rod (66) is sleeved with a spring (65), and two ends of the spring (65) are fixedly connected to the left inner wall of the placement frame (2) and the left side face of the push plate (64).

2. The tool transfer device for subway construction according to claim 1, wherein: the lifting mechanism (5) comprises a mounting plate (51), the front side and the rear side of the bottom surface of the mounting plate (51) are fixedly connected with the upper ends of two electric push rods (55) respectively, the bottom ends of the two electric push rods (55) are fixedly connected to the upper surface of the bottom plate (1), and the input ends of the two electric push rods (55) are electrically connected with the output ends of the switches (8).

3. The tool transfer device for subway construction according to claim 2, wherein: the utility model discloses a motor, including mounting panel (51), recess (52) are seted up to mounting panel (51) upper surface, recess (52) front and back side inner wall passes through antifriction bearing and a plurality of driving roller (53) both ends swing joint, a plurality of driving roller (53) all are connected with same conveyer belt one (54) transmission, leftmost driving roller one (53) rear side fixedly connected with gear one (56), leftmost driving roller one (53) front end passes mounting panel (51) front surface and fixed connection on motor (9) output shaft through antifriction bearing, motor (9) fixed connection is on the mount pad upper surface, and mount pad trailing flank and mounting panel (51) front surface fixed connection, motor (9) input and switch (8) output electricity are connected.

4. The tool transfer device for subway construction according to claim 1, wherein: the placing mechanism comprises a placing plate (71), a placing groove (72) is formed in the upper surface of the placing plate (71), the inner walls of the front side and the rear side of the placing groove (72) are movably connected with two ends of a plurality of driving rollers (73) through rolling bearings, the driving rollers (73) are in transmission connection with the same conveying belt (74), and gears (78) are fixedly connected to the rear side of the right-most driving roller (73).

5. The tool transfer device for subway construction according to claim 4, wherein: the gear III (78) is connected with the gear II (77) in a meshed mode, the gear II (77) is fixedly connected to the fixed shaft (76), two ends of the fixed shaft (76) are respectively and movably connected to the inner walls of the front side and the rear side of the mounting groove (75) through rolling bearings, the mounting groove (75) is formed in the right side face of the placing plate (71), the right side face of the placing plate (71) is communicated with the mounting groove (75) in a penetrating mode through the mounting groove (75), and one of the gear II (77) is connected with the gear I (56) in a meshed mode.