CN218170956U - Dustless lath cutter of fiber cement panel - Google Patents

Abstract

The utility model belongs to the technical field of the building, and a dustless lath cutter of fiber cement panel is disclosed, including placing the platform, the upper end fixed mounting who places the platform has the guide rail, the fixed surface of guide rail installs the movable block, the bottom fixed mounting who places the platform has the waste water tank, the water service tank has been seted up at the top of placing the platform, the movable groove has been seted up at the middle part of movable block, the inside relative dislocation activity of movable groove articulates there are two rotatory pieces. The utility model discloses a cooperation of rotatory piece, rotary clamping groove and bevel protractor isotructure, and when removing the assigned position, not hard up second connecting block for the outside card of the inboard of second connecting block and rotatory piece upper end is on rotary clamping groove's surface, thereby makes rotatory piece no longer remove, and through setting up two rotatory pieces, thereby can be simultaneously to two inclination cutting in, thereby accelerated cutting speed, thereby improved production efficiency.

Description

Dustless lath cutter of fiber cement panel

Technical Field

The utility model belongs to the technical field of the building, specifically a dustless lath cutter of fiber cement panel.

Background

In the prior art, a fiber cement board is commonly used in various places requiring fire prevention and fire retardation, and when decoration is performed, the fiber cement board needs to be cut according to field requirements, and when cutting is performed, a large amount of powder dust can be generated when workers on the field cut, so that the workers are easily sucked into the lungs, various respiratory diseases are caused, and therefore, when cutting is performed, the cutting can be performed while watering, and when cutting is performed on corners, in order to enable wall boards to be attached to walls, gaps are not reserved, so that the cutting needs to be performed in an inclined manner, two adjacent corners are attached to each other, and in the existing cutting mode, manual marking is mostly adopted, and then a cutting machine is used for cutting, so that when cutting is performed, deviation of a cutting angle can be caused due to vibration of a tool and hand shaking, and therefore, when cutting is performed, auxiliary cutting can be performed by arranging a guide rail, but when the angle is adjusted, the cutting is inconvenient due to limitation of the guide rail, the cutting angle can be adjusted, and only one side can be cut, and the production speed is slow.

SUMMERY OF THE UTILITY MODEL

For solving the problem that proposes among the above-mentioned background art, the utility model provides a dustless lath cutter of fiber cement panel has the advantage that convenient adjustment cutting angle and both sides can cut simultaneously and make things convenient for folding removal.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a dustless lath cutter of fiber cement panel, is including placing the platform, the upper end fixed mounting who places the platform has the guide rail, the fixed surface of guide rail installs the movable block, the bottom fixed mounting who places the platform has the wastewater disposal basin, the top of placing the platform has seted up the water flowing trough, the movable groove has been seted up at the middle part of movable block, the inside relative dislocation activity of movable groove articulates there are two rotatory pieces, two the equal fixed mounting in bottom of rotatory piece has cutting device, the equal fixed mounting in left and right sides at movable block top has the bevel protractor, rotatory draw-in groove has been seted up to the upper end of bevel protractor, the equal movable mounting in left and right sides of movable block has first connecting block, the top fixed mounting of first connecting block has the extension spring, the top fixedly connected with second connecting block of extension spring, the inboard and the outside fixed connection of rotatory piece upper end of second connecting block, the inside movable mounting of extension spring has elastic telescopic rod.

Among the above-mentioned technical scheme, it is preferred, place the left side symmetry of platform bottom and install the dead lever, the below of dead lever is provided with first movable supporting leg, the hook piece is installed to the inboard symmetry of first movable supporting leg, the right side symmetry of placing the platform bottom articulates there is second movable supporting leg, the right side symmetry of placing the platform installs the limiting plate, the outside of dead lever is seted up flutedly, the top movable mounting of first movable supporting leg has the gyro wheel, the gyro wheel sets up the inside at the recess, the inboard bottom fixed mounting of dead lever has the connecting rod, the rear side fixed mounting of first movable supporting leg upper end has the swivel nut, the swivel nut activity cup joints the surface at the connecting rod, the front and back bilateral symmetry of placing the platform bottom installs the pothook structure.

In the above technical scheme, preferably, the hook structure includes a fixed frame, a rotary stop block, a movable fixture block, a moving groove and a limit block, the fixed frame is fixedly installed at the front side and the rear side of the bottom of the placing table, the rotary stop block is movably hinged at the lower end of the fixed frame, the movable fixture block is fixedly installed at the upper end of the fixed frame, the moving groove is formed in the surface of the moving block, the limit block is movably clamped inside the moving groove, and the distance between the limit block and the rotary stop block is equal to the thickness value of the hook block.

Among the above-mentioned technical scheme, it is preferred, place the bottom on platform right side to installing the fixed block, the inside movable mounting of fixed block has the movable rod, the length value of movable rod is greater than the thickness value of second movable supporting leg.

Among the above-mentioned technical scheme, preferred, place the top of platform and place the wallboard body, the surface of wallboard body is tangent with cutting device's work end.

In the above technical scheme, preferably, the bottom of the wastewater tank is fixedly provided with a water suction pipe, the other end of the water suction pipe is fixedly connected with the surface of the moving block, the front end and the rear end of the surface of the moving block are symmetrically provided with water spray heads, and the inclination angle of the water spray heads is the same as that of the cutting device.

In the above technical scheme, preferably, the wastewater tank comprises a filter screen and a purified water tank, and the filter screen and the purified water tank are arranged in the wastewater tank from top to bottom.

Among the above-mentioned technical scheme, it is preferred, the surface movable mounting of rotatory piece and rotatory draw-in groove junction has the gear sleeve, the bottom of gear sleeve and the top activity joint of rotatory draw-in groove.

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

1. the utility model discloses a rotatory piece, the cooperation of rotating slot and bevel protractor isotructure, thereby when needs angle adjustment, spur the second connecting block, make the upper end of rotatory piece can remove along the rotating slot on the bevel protractor, then can adjust cutting device's cutting angle, and when removing the assigned position, not hard up second connecting block, make the inboard of second connecting block and the outside card of rotatory piece upper end at rotating slot's surface, thereby make rotatory piece no longer remove, and through setting up two rotatory pieces, thereby can be simultaneously to two inclination cutting time, thereby cutting speed has been accelerated, thereby production efficiency has been improved.

2. The utility model discloses a second movable supporting leg, the cooperation of hook piece and placing platform isotructure, when using, with hook piece and pothook structure separation, thereby make the swivel sleeve rotate along the connecting rod, make the gyro wheel remove in the recess, thereby the effect of support has been played to the left side of placing the platform, simultaneously with the inboard rotation of second movable supporting leg, thereby make second movable supporting leg and place the platform and form the right angle, thereby the effect of support has been played to the right side of placing the platform, and when removing, it is folding to the inboard with the hook piece, make the gyro wheel expose, and contact with ground, and second movable supporting leg is folding to the outside, make it form the handrail, thereby conveniently remove.

Drawings

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

fig. 2 is a schematic view of the bottom view structure of the present invention;

FIG. 3 is a right side view of the structure of the present invention;

FIG. 4 is a left side view of the structure of the present invention;

FIG. 5 is a schematic diagram of the right-side cross-sectional structure of the present invention;

FIG. 6 is an enlarged schematic view of a portion A of FIG. 1 according to the present invention;

fig. 7 is an enlarged schematic view of a portion B of fig. 2 according to the present invention;

fig. 8 is an enlarged schematic view of a portion C of fig. 2 according to the present invention;

fig. 9 is an enlarged schematic view of a portion D of fig. 4 according to the present invention.

In the figure: 1. a placing table; 2. a guide rail; 3. a moving block; 4. a wastewater tank; 41. a filter screen; 42. a water purifying tank; 5. a water trough; 6. a movable groove; 7. rotating the block; 8. a cutting device; 9. an angle ruler; 10. rotating the clamping groove; 11. a first connection block; 12. a tension spring; 13. a second connecting block; 14. an elastic telescopic rod; 15. fixing the rod; 16. a first movable support leg; 17. hooking the block; 18. a second movable support leg; 19. a limiting plate; 20. a groove; 21. a roller; 22. a connecting rod; 23. a rotating sleeve; 24. a hook structure; 241. a fixed frame; 242. rotating the stop block; 243. a movable clamping block; 244. a moving groove; 245. a limiting block; 25. a wall panel body; 26. a suction pipe; 27. a sprinkler head; 28. a fixed block; 29. a movable rod; 30. a gear sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in fig. 1 to 9, the utility model provides a dustless lath cutter of fiber cement panel, including placing platform 1, the upper end fixed mounting who places platform 1 has guide rail 2, the fixed surface of guide rail 2 installs movable block 3, the bottom fixed mounting who places platform 1 has wastewater disposal basin 4, the top of placing platform 1 has seted up water trough 5, movable groove 6 has been seted up at the middle part of movable block 3, the inside relative dislocation activity hinge of movable groove 6 has two rotatory pieces 7, the equal fixed mounting in bottom of two rotatory pieces 7 has cutting device 8, the equal fixed mounting in the left and right sides at movable block 3 top has bevel protractor 9, rotary clamping groove 10 has been seted up to bevel protractor 9's upper end, the equal movable mounting in the left and right sides of movable block 3 has first connecting block 11, the top fixed mounting of first connecting block 11 has extension spring 12, the top fixedly connected with second connecting block 13 of extension spring 12, the inboard outside fixed connection with rotatory piece 7 upper end of second connecting block 13, the inside movable mounting of extension spring 12 has elastic telescopic rod 14.

Adopt above-mentioned scheme: when the angle needs to be adjusted, the second connecting block 13 is pulled upwards firstly, so that the tension spring 12 is pulled, the upper end of the rotating block 7 can move along the rotating clamping groove 10 on the angle ruler 9, then the cutting angle of the cutting device 8 is adjusted, and when the rotating block moves to a specified position, the second connecting block 13 is loosened, so that the tension spring 12 is restored to the original state, the rotating block 7 is movably clamped with the gear sleeve 30 of the first connecting block 11 and the rotating clamping groove 10, so that the rotating block does not move any more, the rotating block 7 on the other side is adjusted in the same mode, so that the two rotating blocks 7 can be respectively adjusted in angle, and the oblique cutting can be performed;

through setting up two rotatory pieces 7 to when cutting, cut respectively in tandem, thereby can be simultaneously to two inclination cutting in, and through setting up elastic telescopic rod 14, thereby make the rotation rate of first connecting block 11 and second connecting block 13 the same, and can not influence the adjustment of angle.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 7 and fig. 9, fixed rods 15 are symmetrically installed on the left side of the bottom of a placing table 1, first movable supporting legs 16 are arranged below the fixed rods 15, hook blocks 17 are symmetrically installed on the inner sides of the first movable supporting legs 16, second movable supporting legs 18 are symmetrically hinged on the right side of the bottom of the placing table 1, limiting plates 19 are symmetrically installed on the right side of the placing table 1, grooves 20 are formed in the outer sides of the fixed rods 15, idler wheels 21 are movably installed at the tops of the first movable supporting legs 16, the idler wheels 21 are arranged inside the grooves 20, connecting rods 22 are fixedly installed at the bottoms of the inner sides of the fixed rods 15, rotary sleeves 23 are fixedly installed on the rear sides of the upper ends of the first movable supporting legs 16, the rotary sleeves 23 are movably sleeved on the surfaces of the connecting rods 22, and hook structures 24 are symmetrically installed on the front side and the rear side of the bottom of the placing table 1.

The scheme is adopted: when the placing table 1 is used, the placing table 1 is moved to a designated place through the roller 21, then the hook block 17 is separated from the fixed frame 241, so that the rotating sleeve 23 rotates along the connecting rod 22, the roller 21 moves into the groove 20, the left side of the placing table 1 is supported, and meanwhile, the second movable supporting leg 18 rotates towards the inner side, so that the second movable supporting leg 18 forms a right angle with the placing table 1, and the supporting function is realized;

through setting up gyro wheel 21, thereby conveniently place platform 1 and remove, and through the recess 20 of seting up on dead lever 15, thereby when not using, gyro wheel 21 can be accomodate in connecting rod 22, reduce the space that occupies, and through forming the right angle with first movable supporting leg 16 and dead lever 15, thereby play the effect of support to the left side of placing platform 1, simultaneously with the inboard rotation of second movable supporting leg 18, thereby make second movable supporting leg 18 and place platform 1 and form the right angle, thereby play the effect of support to the right side of placing platform 1.

As shown in fig. 2 and 8, the hook structure 24 includes a fixed frame 241, a rotary stopper 242, a movable latch 243, a moving groove 244 and a stop block 245, the fixed frame 241 is fixedly installed at the front and rear sides of the bottom of the placing table 1, the rotary stopper 242 is movably hinged at the lower end of the fixed frame 241, the movable latch 243 is fixedly installed at the upper end of the fixed frame 241, the moving groove 244 is opened on the surface of the movable latch 243, the stop block 245 is movably clamped inside the moving groove 244, and the distance between the stop block 245 and the rotary stopper 242 is equal to the thickness value of the hook block 17.

Adopt above-mentioned scheme: when the hook is used, the hook block 17 is firstly contacted with the rotating stop block 242, so that the rotating stop block 242 moves upwards, then the hook block 17 rotates into the fixed frame 241, then the rotating stop block 242 is restored, and then the hook block 17 moves to the limiting block 245 to extrude the hook block 17 to stop moving;

there is a rotation stopper 242 through the lower end activity hinge of the fixed frame 241 to make things convenient for the hook 17 to rotate the trip in the inside of the fixed frame 241, then because the effect of the rotation stopper 242, and through the distance between the stopper 245 and the rotation stopper 242 equals the thickness value of the hook 17, thereby when carrying out the trip, move the stopper 245 and extrude the hook 17, thereby avoid it to move.

As shown in fig. 1, 2 and 3, a fixed block 28 is mounted at the bottom of the right side of the placing table 1, a movable rod 29 is movably mounted inside the fixed block 28, and the length value of the movable rod 29 is greater than the thickness value of the second movable supporting leg 18.

Adopt above-mentioned scheme: the movable rod 29 in the fixed block 28 is moved to the front side, thereby limiting the second movable supporting leg 18 and preventing the second movable supporting leg from moving during operation.

Through the cooperation of the fixed block 28 and the movable rod 29, the movable rod 29 can play a role of designated limit on the second movable supporting leg 18 when in work, and can move to one side when not in work, so that the folding work can not be influenced.

As shown in fig. 1 and 5, a wallboard body 25 is placed on top of placing table 1, the surface of wallboard body 25 being tangent to the working end of cutting device 8.

Adopt above-mentioned scheme: when working, wallboard body 25 will be tangent to the working end of cutting device 8, thereby causing wallboard body 25 to cut into a designated shape;

by placing the wall plate body 25 on top of the placing table 1, the surface of the wall plate body 25 is then tangent to the working end of the cutting device 8, so that the cutting device 8, when moved, will be tangent to the wall plate body 25.

As shown in fig. 1, 2 and 5, a water suction pipe 26 is fixedly installed at the bottom of the wastewater tank 4, the other end of the water suction pipe 26 is fixedly connected with the surface of the moving block 3, water spray heads 27 are symmetrically installed at the front end and the rear end of the surface of the moving block 3, and the inclination angle of the water spray heads 27 is the same as that of the cutting device 8.

The scheme is adopted: when water is sprayed, the water suction pipe 26 starts a water pump carried by the water suction pipe to pump water in the wastewater tank 4 into the movable block 3, and then the water is sprayed to a designated place through the water spray head 27;

by spraying water to a prescribed place, the cut dust and other foreign matter is treated together with the water flowing to the prescribed place, while the sprayed water cools the cutting blade of the cutting device 8, thereby avoiding overheating.

As shown in fig. 5, the waste water tank 4 includes a strainer 41 and a clean water tank 42, and the strainer 41 and the clean water tank 42 are disposed inside the waste water tank 4 from top to bottom.

Adopt above-mentioned scheme: when water flows into the waste water tank 4, the water is filtered by the filter screen 41 and then enters the clean water tank 42;

by arranging the filter screen 41 and the purified water tank 42, the used water is filtered, so that the recycling of water resources is realized, and the resource consumption is reduced.

As shown in fig. 5, a gear sleeve 30 is movably mounted on the surface of the joint of the rotary block 7 and the rotary slot 10, and the bottom of the gear sleeve 30 is movably clamped with the top of the rotary slot 10

Adopt above-mentioned scheme: when the rotating block 7 and the rotating slot 10 move, the gear sleeve 30 on the surface of the rotating block is driven to move along the tooth socket of the rotating slot 10;

there is gear sleeve 30 through the surface movable mounting at rotatory piece 7 and rotatory draw-in groove 10 junction to gear sleeve 30's bottom and the top activity joint of rotatory draw-in groove 10, thereby when removing the appointed place, gear sleeve 30's bottom and the top activity joint of rotatory draw-in groove 10, thereby no longer remove.

The utility model discloses a theory of operation and use flow:

when the placing table 1 is used, the placing table 1 is moved to a designated place through the roller 21, then the limiting block 245 on the movable clamping block 243 on the clamping hook structure 24 is moved towards the left side, so that the hook block 17 can move upwards, so that the rotating limiting block 242 can rotate upwards, so that the hook block 17 is separated from the fixed frame 241, so that the rotating sleeve 23 on the first movable supporting leg 16 rotates along the connecting rod 22, so that the roller 21 moves into the groove 20, so that the first movable supporting leg 16 forms a right angle with the fixed rod 15, so that the left side of the placing table 1 is supported, meanwhile, the second movable supporting leg 18 rotates towards the inner side, so that the second movable supporting leg 18 forms a right angle with the placing table 1, so that the supporting effect is achieved, then the movable rod 29 in the fixed block 28 moves towards the front side, so that the limiting supporting effect is achieved on the second movable supporting leg 18, so that the moving is avoided, so that the placing table 1 collapses, and the progress of work is influenced;

when the cutting angle of the cutting device 8 needs to be adjusted, the second connecting block 13 is pulled upwards at first, so that the tension spring 12 is pulled, the rotating block 7 is moved according to the angle to be adjusted, the upper end of the rotating block 7 is moved along the rotating clamping groove 10 on the angle ruler 9, the lower end of the rotating block is rotated along the hinge point in the groove 20, so that the cutting angle of the cutting device 8 is adjusted, when the second connecting block 13 is moved, the first connecting block 11 is driven to rotate, when the second connecting block 13 is moved to a specified position, the second connecting block 13 is loosened, so that the tension spring 12 is restored to the original state, so that the gear sleeve 30 of the rotating block 7 and the gear sleeve 30 of the first connecting block 11 are movably clamped with the rotating clamping groove 10, so that the rotating block 7 does not move any more, and the rotating block 7 arranged on the other side of the rotating block is adjusted in the same manner;

when cutting is carried out, the moving block 3 is moved manually and then moved along the guide rail 2, so that the cutting device 8 is in contact with the wallboard body 25 placed on the placing table 1, angle cutting is carried out on the wallboard body, meanwhile, a water pumping motor of the water suction pipe 26 is started, filtered water in a water purifying tank 42 at the bottom of the wastewater tank 4 is pumped out and then is transmitted to water spraying heads 27 at the front side and the rear side of the moving block 3 to spray water, so that when the cutting device 8 is used for cutting, sundries such as cut dust and the like are discharged into a filter screen 41 at the upper end of the wastewater tank 4 through a water passing tank 5 at the top of the placing table 1 to be subjected to water division filtering, and meanwhile, the sprayed water is used for cooling the cutting blade of the cutting device 8, so that overheating is avoided;

and when the processing is completed, the folding is performed again so that the roller 21 is moved out of the groove 20, thereby facilitating the movement.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims (8)

1. The utility model provides a dustless lath cutter of fiber cement panel, is including placing platform (1), its characterized in that: the utility model discloses a rotary clamping device, including placing platform (1), place the upper end fixed mounting of platform (1) have guide rail (2), the fixed surface of guide rail (2) installs movable block (3), the bottom fixed mounting of placing platform (1) has wastewater disposal basin (4), place the top of platform (1) and seted up water trough (5), movable groove (6) have been seted up at the middle part of movable block (3), the inside relative dislocation activity of movable groove (6) articulates there are two rotatory pieces (7), two the equal fixed mounting in bottom of rotatory piece (7) has cutting device (8), the equal fixed mounting in the left and right sides at movable block (3) top has angle chi (9), rotary clamping groove (10) have been seted up to the upper end of angle chi (9), the equal movable mounting in the left and right sides of movable block (3) has first connecting block (11), the top fixed mounting of first connecting block (11) has extension spring (12), the top fixedly connected with second connecting block (13) of extension spring (12) upper end, the inboard and rotatory piece (7) outside fixed connection, the movable mounting of extension spring (12) has elastic expansion link (14).

2. A fibre cement board dust free cutting machine as claimed in claim 1, characterized in that: place the left side symmetry of platform (1) bottom and install dead lever (15), the below of dead lever (15) is provided with first movable supporting leg (16), hook block (17) are installed to the inboard symmetry of first movable supporting leg (16), the right side symmetry of placing platform (1) bottom articulates there is second movable supporting leg (18), place the right side symmetry of platform (1) and install limiting plate (19), recess (20) are seted up in the outside of dead lever (15), the top movable mounting of first movable supporting leg (16) has gyro wheel (21), gyro wheel (21) set up the inside at recess (20), the inboard bottom fixed mounting of dead lever (15) has connecting rod (22), the rear side supporting leg fixed mounting of first movable supporting leg (16) upper end has swivel housing (23), swivel housing (23) activity cup joints the surface at connecting rod (22), place the front and back bilateral symmetry of platform (1) bottom and install pothook structure (24).

3. A fibre cement board dust free cutting machine as claimed in claim 2, characterized in that: the clamping hook structure (24) comprises a fixed frame (241), a rotary stop block (242), a movable clamping block (243), a moving groove (244) and a limiting block (245), wherein the fixed frame (241) is fixedly arranged at the front side and the rear side of the bottom of the placing table (1), the rotary stop block (242) is movably hinged at the lower end of the fixed frame (241), the movable clamping block (243) is fixedly arranged at the upper end of the fixed frame (241), the moving groove (244) is arranged on the surface of the movable clamping block (243), the limiting block (245) is movably clamped in the moving groove (244), and the distance between the limiting block (245) and the rotary stop block (242) is equal to the thickness value of the hook block (17).

4. A fibre cement board dust free cutting machine as claimed in claim 2, characterized in that: the bottom on the right side of the placing table (1) is provided with a fixed block (28), the inside movable mounting of the fixed block (28) is provided with a movable rod (29), and the length value of the movable rod (29) is larger than the thickness value of the second movable supporting leg (18).

5. A fibre cement board dust free cutting machine as claimed in claim 1, characterized in that: the wallboard body (25) is placed at the top of the placing table (1), and the surface of the wallboard body (25) is tangent to the working end of the cutting device (8).

6. A fibre cement board dust free cutting machine as claimed in claim 1, characterized in that: the bottom fixed mounting of waste water tank (4) has tub (26) that absorbs water, the other end that absorbs water tub (26) is connected with the fixed surface of movable block (3), sprinkler bead (27) are installed to both ends symmetry around movable block (3) surface, the inclination of sprinkler bead (27) is the same with the inclination of cutting device (8).

7. A fibre cement board dust free cutting machine as claimed in claim 1, characterized in that: the waste water tank (4) comprises a filter screen (41) and a water purifying tank (42), and the filter screen (41) and the water purifying tank (42) are arranged in the waste water tank (4) from top to bottom.

8. A fibre cement board dust free cutting machine as claimed in claim 1, characterized in that: the surface movable mounting of rotatory piece (7) and rotatory draw-in groove (10) junction has gear sleeve (30), the bottom of gear sleeve (30) and the top activity joint of rotatory draw-in groove (10).

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