CN210549910U

CN210549910U - Air leg rock drill production is with vertical milling machine's workstation

Info

Publication number: CN210549910U
Application number: CN201921612627.7U
Authority: CN
Inventors: 张惠茹; 张尚海; 刘传磊
Original assignee: Jinan Ruitian Mechanical Equipment Co Ltd
Current assignee: Jinan Ruitian Mechanical Equipment Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-05-19
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a gas leg rock drill production is with vertical milling machine's workstation relates to vertical milling machine's technical field, including the stage body, the stand is installed to one side of the stage body, still including installing the protection machanism of one side of stage body symmetry stand, protection machanism includes guard plate, mounting panel and locating component, the mounting panel links to each other with the roof of the stage body, follow the length direction's of the stage body both ends fixedly connected with installation piece on the mounting panel, two be provided with the guard plate between the installation piece, fixedly connected with connecting block on the both sides lateral wall of guard plate, the spread groove has been seted up on the installation piece, the connecting block rotates with the spread groove and links to each other, be provided with the locating component of location guard plate on the installation piece. The utility model discloses have the effect that blocks the iron fillings that splash.

Description

Air leg rock drill production is with vertical milling machine's workstation

Technical Field

The utility model belongs to the technical field of vertical milling machine's technique and specifically relates to a vertical milling machine's workstation is used in air leg rock drill production.

Background

An air-leg rock drill is a high efficiency rock drilling machine. The hydraulic rock drilling machine is widely applied to rock roadway tunneling and drilling blast holes in various rock drilling operations, and is an important machine in rock engineering such as mines, railways, traffic, water conservancy construction and the like.

The milling machine mainly refers to a machine tool for processing various surfaces of a workpiece by using a milling cutter, the milling machine is generally divided into a horizontal milling machine and a vertical milling machine, the two are mainly distinguished as a main shaft, the main shaft of the vertical milling machine is vertically downward, the main shaft of the horizontal milling machine is in the horizontal direction, when the vertical milling machine works, the main shaft drives the cutter to rotate in situ, and the workpiece is driven to move by a workbench to mill the workpiece. The existing work bench of the vertical milling machine for the production of air leg rock drills usually adopts an open design for the convenience of workers.

The existing vertical milling machine mainly comprises a machine frame, a stand column, a spindle box, a tool holder, a tool and a workbench, wherein the stand column is fixedly connected to the machine frame, and the spindle box is installed on the stand column. The output end of the main spindle box is rotatably connected with a cutter frame capable of lifting up and down, and cutters are arranged on the cutter frame. The rack is also provided with a workbench arranged below the cutter. When the vertical milling machine works, a workpiece to be machined is arranged on the workbench, the spindle box drives the cutter to rotate, and the cutter frame drives the rotating cutter to cut the workpiece when descending, so that the surface of the workpiece is machined.

The above prior art solutions have the following drawbacks: the vertical milling machine of open design makes the workman be stained with the clothes by the iron fillings that the cutter was polished down from the work piece easily when using vertical milling machine, fish tail workman easily, and some common vertical milling machine workstations that add and have the protection plate are difficult for accomodating, can influence the operation of workman to the milling machine.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a vertical milling machine's workstation is used in air leg rock drill production blocks partial iron fillings through increasing protection machanism on the workstation and splashes to the workman to operation milling machine protects.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a gas leg rock drill production is with vertical milling machine's workstation, includes the stage body, the stand is installed to one side of the stage body, still including installing the protection machanism of one side of stage body symmetry stand, protection machanism includes guard plate, mounting panel and locating component, the mounting panel links to each other with the roof of the stage body, follow the length direction's of the stage body both ends fixedly connected with installation piece on the mounting panel, two be provided with the guard plate between the installation piece, fixedly connected with connecting block on the both sides lateral wall of guard plate, the spread groove has been seted up on the installation piece, the connecting block rotates with the spread groove and links to each other, be provided with the locating component of location guard plate on the installation.

Through adopting above-mentioned technical scheme, the workman overturns the guard plate earlier when operating the milling machine for the guard plate is overturned to the mounting panel top, after the guard plate overturns to the mounting panel top, uses locating component to fix the guard plate. When a worker operates the milling machine, the protective plate can help to block part of iron scraps milled from a workpiece, so that the effect of preventing the splashed iron scraps from generating danger to an operator is achieved.

The utility model discloses further set up to: the locating component comprises a locating block, a torsional spring and a stop dog, wherein the stop dog is arranged on one side, close to the stand, of the connecting block, the two ends of the stop dog are fixedly connected with the two mounting blocks respectively, two locating blocks are arranged on one side, far away from the stand, of the connecting block and are connected with the side wall of the two mounting blocks respectively in a rotating mode, the torsional spring is arranged on one side, close to the connecting block, of the locating block, the side wall of the locating block at one end of the torsional spring is connected with the side wall of the mounting block, and.

Through adopting above-mentioned technical scheme, the guard plate is when fixing a position after the upset, the guard plate is when the upset, the locating piece of contradicting earlier in the guard plate rotation in the both sides of guard plate, the locating piece receives the extrusion of guard plate and the restaurant, the locating piece produces the extrusion to the torsional spring when the upset, make the torsional spring take place deformation, then when the locating piece continues to rotate, the locating piece gets into between locating piece and the dog, after the locating piece gets into between locating piece and the dog, pressure on the locating piece disappears, the torsional spring is for restoring deformation and pressing the locating piece of upset back initial position again. When the protection plate is between locating piece and dog, locating piece and dog have all played the effect that blocks the support to the protection plate for the protection plate is difficult for turning over from the mounting panel and gets back to initial position.

The utility model discloses further set up to: the side wall of one side of the positioning block, which is far away from the connecting block, is arc-shaped, and the width of one end, which is far away from the positioning block and is connected with the mounting block in a rotating mode, of the positioning block is smaller than the width of one end, which is connected with the mounting block in a rotating mode, of the positioning block.

Through adopting above-mentioned technical scheme, the cambered surface is set to one side that the connecting block was kept away from to the locating piece for the guard plate can break away from with the locating piece more easily when the upset, and need not make the locating piece upset to just can be with the mounting panel in the guard plate upset with the mounting block side wall is parallel, so one side that the connecting block was kept away from to the locating piece sets up the installation that makes the guard plate to the cambered surface more convenient laborsaving.

The utility model discloses further set up to: one side of the locating block, which is far away from the connecting block, is provided with a butting block, one end of the butting block is fixedly connected with the mounting block, and the side wall of one side, which is close to the locating block, of the butting block is abutted against the side wall of the locating block.

Through adopting above-mentioned technical scheme, when the guard plate rotates to between guard plate and the dog, one side of guard plate receives the butt when the dog and difficult emergence is rotated, and after one side of keeping away from the dog as the locating piece was provided with the butt piece, the butt piece had certain butt effect to the locating piece for the locating piece is difficult to take place to keep away from the direction upset of dog one side, improves the stability of guard plate.

The utility model discloses further set up to: be provided with the translation subassembly between mounting panel and the stage body, the translation subassembly includes translation board, slide rail, locating lever and locking piece, the spout has been seted up on the diapire of translation board, install the slide rail along the length direction of stage body on the roof of stage body, the slide rail slides with the spout and links to each other, one side that the stand was kept away from to the slide rail is provided with the locating lever, the locating lever links to each other with stage body length direction's both ends stationary phase, be provided with the locking piece with locating lever cooperation locking on the diapire of translation board, the roof of translation board links to each other with the mounting panel.

Through adopting above-mentioned technical scheme, the guard plate can slide on the stage body for the guard plate can change in the position of horizontal direction, and when milling machine during operation, the guard plate that can slide when the operator moves comes to carry out the protection of continuation to oneself, thereby has improved the protection scope of guard plate.

The utility model discloses further set up to: the locking piece includes first locking piece, second locking piece and locking bolt, first locking piece one end is articulated mutually with the diapire of translation board, first locking groove has been seted up to the other end of first locking piece, second locking piece one end is articulated mutually with the diapire of translation board, the second locking groove has been seted up to the other end of second locking piece, first locking groove and second locking groove and locating lever joint, the one end that pin joint was kept away from to first locking piece has seted up the thread groove, the one end that pin joint was kept away from to the second locking piece has seted up the screw hole, be provided with locking bolt on the second locking piece, locking bolt passes screw hole and thread groove threaded connection.

Through adopting above-mentioned technical scheme, the locking piece is when the locking, the mounting panel slides to required position back along the slide rail, rotate first locking piece and second locking piece, make first locking groove and second locking groove on first locking piece and the second locking piece joint earlier with the locating lever, then screw up the one end of pin joint is kept away from first locking piece and second locking piece each other through the locking bolt again, thereby make first locking piece and second locking piece clamp tightly mutually with the locating lever, thereby it is fixed with the mounting panel.

The utility model discloses further set up to: be provided with the clearance subassembly on the guard plate, the clearance subassembly includes driving piece, live-rollers and brush hair, the driving piece is installed to the both sides of guard plate, rotates on the driving piece and is connected with the live-rollers, fixedly connected with brush hair on the week lateral wall of live-rollers, the brush hair is inconsistent with the lateral wall of guard plate.

Through adopting above-mentioned technical scheme, the guard plate is after long-term the use, and the guard plate can be stained with more iron fillings near one side of milling cutter work, needs regularly clear up it to iron fillings accumulation on the maintenance guard plate is too much and influences the guard effect of guard plate. During the clearance, driving piece drive live-rollers rotates and drives the live-rollers and slide from top to bottom, and the live-rollers drives the brush hair on the live-rollers and clears up the guard plate surface when rotating for the iron fillings on guard plate surface are clear away.

The utility model discloses further set up to: the driving piece comprises a rack, a fixing plate, a first gear, a second gear and a rotating handle, the two sides of the protection plate are fixedly connected with the rack along the length direction of the protection plate, the side wall of the rack is provided with the fixing plate, one end of the fixing plate is connected with the rack side wall in a sliding mode, the other end of the fixing plate is connected with the first gear in a rotating mode, the second gear is arranged between the first gear and the rack, the rotating shaft of the second gear is connected with the fixing plate in a rotating mode, one side of the second gear is meshed with the rack, the other side of the second gear is meshed with the first gear, the rotating shaft is connected with the first gear, the rotating handle is arranged on one side, deviating from the first gear, of the fixing plate, and the rotating shaft of the.

Through adopting above-mentioned technical scheme, rotate the rotation handle and rotate, the rotation handle rotates and drives first gear and rotate, first gear rotation drives the second gear and rotates, make the second gear remove on the rack during second gear rotation, drive first gear synchronous motion through the fixed plate during second gear removal, thereby make the live-rollers that link to each other with first gear reciprocate, and first gear drives the live-rollers simultaneously when rotating and rotates, the live-rollers rotates and drives the brush hair and clear up the guard plate.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the scrap iron is blocked by the protective plate which can slide on the table body, and an operator who operates the milling machine is protected, so that the splashed scrap iron is prevented from hitting the body of the operator;

2. through the clearance subassembly that sets up clearance iron fillings on the guard plate for iron fillings on the guard plate can regularly obtain the clearance, make iron fillings on the guard plate be difficult for influencing the function of guard plate because the accumulation is too much.

Drawings

FIG. 1 is a perspective view of a drill press;

FIG. 2 is a perspective view of the table body and shield assembly;

FIG. 3 is an enlarged view of a portion A of FIG. 2, illustrating the connection between the locking structure and the positioning rod;

FIG. 4 is an enlarged view of a portion B of FIG. 2, illustrating the connection between the positioning assembly and the mounting block;

FIG. 5 is an enlarged view of a portion C of FIG. 2, illustrating the installation of the cleaning assembly in relation to the fender.

Reference numerals: 1. a table body; 11. a column; 2. a protection mechanism; 21. a protection plate; 22. mounting a plate; 23. a positioning assembly; 231. positioning blocks; 232. a torsion spring; 233. a stopper; 3. mounting blocks; 31. connecting blocks; 32. connecting grooves; 33. a butting block; 4. a translation assembly; 41. a translation plate; 42. a slide rail; 421. a chute; 43. positioning a rod; 44. a locking member; 441. a first locking block; 442. a first locking groove; 443. a second locking block; 445. a second locking slot; 446. a locking bolt; 46. a threaded hole; 5. cleaning the assembly; 51. a drive member; 511. a rack; 512. a fixing plate; 513. a first gear; 514. a second gear; 515. rotating the handle; 52. a rotating roller; 53. and (3) brush hairs.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, the utility model discloses a cutter mounting structure of vertical milling machine, including stage body 1, fixedly connected with and 1 roof looks vertically stand 11 of stage body on the lateral wall of stage body 1 one side, one side of 1 symmetry stand 11 of stage body is provided with protection machanism 2.

Referring to fig. 2, the protection mechanism 2 comprises a translation assembly 4, the translation assembly 4 comprising a translation plate 41, a slide rail 42, a positioning rod 43 and a lock 44. The bottom wall of the translation plate 41 is provided with a sliding groove 421, the top wall of the table body 1 is fixedly connected with a sliding rail 42 along the length direction of the table body 1, and the sliding rail 42 is connected with the sliding groove 421 in a sliding manner. One side of the slide rail 42 far away from the upright post 11 is provided with a positioning rod 43, and two ends of the positioning rod 43 are respectively fixedly connected with two ends of the table body 1 in the length direction.

Referring to fig. 2 and 3, the locking member 44 includes a first locking block 441, a second locking block 443, and a locking bolt 446, the longitudinal axes of the first locking block 441 and the second locking block 443 are on the same plane, and the longitudinal axes of the first locking block 441 and the second locking block 443 are perpendicular to the axis of the positioning rod 43. One end of the first locking block 441 is hinged to the bottom wall of the translation plate 41, the other end of the first locking block 441 is provided with a first locking groove 442, one end of the second locking block 443 is hinged to the bottom wall of the translation plate 41, the other end of the second locking block 443 is provided with a second locking groove 445, and the first locking groove 442 and the second locking groove 445 are respectively clamped with two sides of the positioning rod 43. The end of the first locking block 441 far away from the hinge point of the first locking block 441 is provided with a threaded groove, the end of the second locking block 443 far away from the hinge point of the second locking block 443 is provided with a threaded hole 46, the second locking block 443 is provided with a locking bolt 446, and the locking bolt 446 passes through the threaded hole 46 and is in threaded connection with the threaded groove.

When the translation plate 41 is locked, the lock bolt 446 presses the first and second lock blocks 441, 443 against the positioning rod 43. When the translation plate 41 slides, the locking bolt 446 is loosened so that a gap is formed between the first and second locking

grooves

442 and 445 and the detent lever 43.

Referring to fig. 2 and 4, the protection mechanism 2 further includes a protection plate 21, a mounting plate 22 and a positioning assembly 23, and the mounting plate 22 is fixedly connected to the top wall of the translation plate 41. The both ends fixedly connected with installation piece 3 of the 1 length direction of stage body is followed to mounting panel 22, is provided with guard plate 21 on the mounting panel 22, and the one end of guard plate 21 is provided with cylindrical connecting block 31, and the ascending axis setting of connecting block 31 symmetry mounting panel 22 length direction, and two connecting blocks 31 are fixed continuous with the lateral wall of mounting panel 22 both sides respectively. The side wall of the side where the two mounting blocks 3 are close to each other is provided with a connecting groove 32, and the connecting block 31 is rotatably connected with the connecting groove 32.

The mounting block 3 is provided with a positioning assembly 23, and the positioning assembly 23 comprises a positioning block 231, a torsion spring 232 and a stop 233. One side of the connecting block 31 close to the upright post 11 is provided with a stop 233, and two ends of the stop 233 are respectively fixedly connected with the side walls of the two mounting blocks 3. Each mounting block 3 is rotatably connected with a positioning block 231, the positioning block 231 is arranged on one side of the connecting block 31 far away from the upright post 11, and the positioning block 231. The side wall of the positioning block 231 on the side far away from the connecting block 31 is arc-shaped, and the width of the end of the positioning block 231 far away from the end rotationally connected with the mounting block 3 is smaller than the width of the end of the positioning block 231 rotationally connected with the mounting block 3.

Referring to fig. 2 and 4, a torsion spring 232 is disposed on one side of the positioning block 231 close to the connecting block 31, the side wall of the positioning block 231 at one end of the torsion spring 232 is fixedly connected, and the other end of the torsion spring 232 is fixedly connected with the side wall of the mounting block 3. One side of the positioning block 231, which is far away from the connecting block 31, is provided with a butting block 33, one end of the butting block 33 is fixedly connected with the mounting block 3, and the side wall of one side of the butting block 33, which is close to the positioning block 231, is butted against the side wall of the positioning block 231.

Referring to fig. 2 and 5, a cleaning assembly 5 is further disposed on the shielding plate 21, the cleaning assembly 5 includes a driving member 51, a rotating roller 52 and bristles 53, and the driving member 51 includes a rack 511, a fixed plate 512, a first gear 513, a second gear 514 and a rotating handle 515. The lateral wall of the both sides of protection plate 21 goes up along the length direction fixedly connected with rack 511 of protection plate 21, has seted up spout 421 on the lateral wall of rack 511, and sliding connection has the slider in spout 421, and one side fixedly connected with fixed plate 512 at the bottom of spout 421 tank is kept away from to the slider. One end of the fixing plate 512, which is far away from the end connected with the sliding block, is rotatably connected with a first gear 513, a second gear 514 is arranged between the first gear 513 and the rack 511, the rotating shaft of the second gear 514 is rotatably connected with the fixing plate 512, one side of the second gear 514 is meshed with the rack 511, and the other side of the second gear 514 is meshed with the first gear 513.

Referring to fig. 5, a rotating handle 515 is rotatably connected to a side wall of the fixing plate 512 facing away from the first gear 513, and the rotating handle 515 passes through the fixing plate 512 and is fixedly connected to a rotating shaft of the first gear 513. One side of the first gear 513, which is far away from the fixing plate 512, is fixedly connected with a rotating roller 52, bristles 53 are fixedly connected to the rotating roller 52, and the bristles 53 are abutted against the side wall of the protection plate 21.

The implementation principle of the embodiment is as follows: when the operation milling machine processes the work piece, rotate guard plate 21 earlier, extrude the arcwall face of locating piece 231 during guard plate 21 rotates, and locating piece 231 receives the upset of articulated shaft after the pressure to compress torsional spring 232, make the distance increase between the locating piece 231, make guard plate 21 rotate smoothly and get into between locating piece 231 and the fender position piece. After the rotating plate rotates to a position between the positioning block 231 and the stopper, the pressure on the positioning block 231 disappears, and the positioning block 231 is restored to the initial state by the elastic force of the torsion spring 232 restored to the deformation, so that the protection plate 21 is clamped between the positioning block 231 and the stopper.

Then, the translation plate 41 is slid to a position where the scrap iron splashed on the workpiece can be protected, and then the lock bolt 446 is tightened so that the first and second lock blocks 441 and 443 are abutted against the positioning rod 43.

And then the milling machine is operated to process. The iron filings milled during the operation of the milling machine can be partially blocked by the protective plate 21, so that the milling machine can be protected by workers.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a production of air leg rock drill is with vertical milling machine's workstation, includes stage body (1), stand (11), its characterized in that are installed to one side of stage body (1): still including installing protection machanism (2) of one side of the stage body (1) symmetry stand (11), protection machanism (2) are including guard plate (21), mounting panel (22) and locating component (23), mounting panel (22) link to each other with the roof of stage body (1), follow the length direction's of stage body (1) both ends fixedly connected with installation piece (3) on mounting panel (22), two be provided with guard plate (21) between installation piece (3), fixedly connected with connecting block (31) on the both sides lateral wall of guard plate (21), spread groove (32) have been seted up on installation piece (3), connecting block (31) rotate with spread groove (32) and link to each other, be provided with locating component (23) of location guard plate (21) on installation piece (3).

2. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 1, wherein: locating component (23) is including locating piece (231), torsional spring (232) and dog (233), one side that connecting block (31) is close to stand (11) is provided with dog (233), the both ends of dog (233) are fixed continuous with two installation pieces (3) respectively, one side that stand (11) were kept away from in connecting block (31) is provided with two locating pieces (231), two locating piece (231) rotate with the lateral wall of two installation pieces (3) respectively and link to each other, one side that locating piece (231) are close to connecting block (31) is provided with torsional spring (232), the lateral wall of one end locating piece (231) of torsional spring (232) links to each other, the other end of torsional spring (232) links to each other with the lateral wall of installation piece (3).

3. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 2, characterized in that: the side wall of one side, away from the connecting block (31), of the positioning block (231) is arc-shaped, and the width of the end, away from the end rotationally connected with the mounting block (3), of the positioning block (231) is smaller than the width of the end rotationally connected with the mounting block (3) of the positioning block (231).

4. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 2, characterized in that: one side of the locating block (231) far away from the connecting block (31) is provided with a butting block (33), one end of the butting block (33) is fixedly connected with the mounting block (3), and the side wall of one side, close to the locating block (231), of the butting block (33) is abutted to the side wall of the locating block (231).

5. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 1, wherein: be provided with translation subassembly (4) between mounting panel (22) and stage body (1), translation subassembly (4) are including translation board (41), slide rail (42), locating lever (43) and locking piece (44), spout (421) have been seted up on the diapire of translation board (41), slide rail (42) are installed to the length direction who follows stage body (1) on the roof of stage body (1), slide rail (42) slide with spout (421) and link to each other, one side that stand (11) were kept away from in slide rail (42) is provided with locating lever (43), locating lever (43) are fixed continuous with stage body (1) length direction's both ends, be provided with locking piece (44) with locating lever (43) cooperation locking on the diapire of translation board (41), the roof of translation board (41) links to each other with mounting panel (22).

6. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 5, wherein: the locking piece (44) comprises a first locking block (441), a second locking block (443) and a locking bolt (446), one end of the first locking block (441) is hinged with the bottom wall of the translation plate (41), the other end of the first locking block (441) is provided with a first locking groove (442), one end of the second locking block (443) is hinged with the bottom wall of the translation plate (41), the other end of the second locking block (443) is provided with a second locking groove (445), the first locking groove (442) and the second locking groove (445) are clamped with the positioning rod (43), a thread groove is arranged at one end of the first locking block (441) far away from the hinge point, a threaded hole (46) is arranged at one end of the second locking block (443) far away from the hinge point, the second locking block (443) is provided with a locking bolt (446), and the locking bolt (446) penetrates through the threaded hole (46) to be in threaded connection with the threaded groove.

7. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 1, wherein: be provided with clearance subassembly (5) on guard plate (21), clearance subassembly (5) are including driving piece (51), live-rollers (52) and brush hair (53), driving piece (51) are installed to the both sides of guard plate (21), and it is connected with live-rollers (52) to rotate on driving piece (51), fixedly connected with brush hair (53) on the week lateral wall of live-rollers (52), brush hair (53) are inconsistent with the lateral wall of guard plate (21).

8. The workbench of the vertical milling machine for the production of the air leg rock drill according to claim 7, wherein: the driving part (51) comprises a rack (511), a fixing plate (512), a first gear (513), a second gear (514) and a rotating handle (515), the racks (511) are fixedly connected to the two sides of the protection plate (21) along the length direction of the protection plate (21), the fixing plate (512) is arranged on the side wall of the rack (511), one end of the fixing plate (512) is connected with the side wall of the rack (511) in a sliding manner, the first gear (513) is rotatably connected to the other end of the fixing plate (512), the second gear (514) is arranged between the first gear (513) and the rack (511), the rotating shaft of the second gear (514) is rotatably connected with the fixing plate (512), one side of the second gear (514) is meshed with the rack (511), the other side of the second gear (514) is meshed with the first gear (513), and the rotating shaft is connected with the first gear (513), one side of the fixing plate (512) departing from the first gear (513) is provided with a rotating handle (515), and the rotating handle (515) is connected with a rotating shaft of the first gear (513).