CN206274818U

CN206274818U - A kind of GREEB HEDGE MACHINE with sawing function

Info

Publication number: CN206274818U
Application number: CN201621079859.7U
Authority: CN
Inventors: 李道焱; 朱振杰; 严智华
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2016-09-26
Filing date: 2016-09-26
Publication date: 2017-06-27
Anticipated expiration: 2026-09-26

Abstract

The utility model discloses a kind of GREEB HEDGE MACHINE with sawing function, belong to electric tool technical field, including actuating unit, transmission mechanism and blade mechanisms, actuating unit drives blade mechanisms to run by transmission mechanism, blade mechanisms include the relative cutter and bottom knife for moving back and forth when down devices and operation, the at least side of cutter length direction and at least side of bottom knife length direction are interval with multiple tooth positions, and the cutter and bottom knife are provided with saw cutting mechanism.The GREEB HEDGE MACHINE with sawing function that the utility model is provided, blade mechanisms to existing GREEB HEDGE MACHINE are improved, and saw cutting mechanism is set between cutter and bottom knife, for cutting off thicker branch, the cut coverage of GREEB HEDGE MACHINE is increased, the versatility of GREEB HEDGE MACHINE is effectively increased.

Description

A kind of GREEB HEDGE MACHINE with sawing function

Technical field

The utility model is related to electric tool technical field, more particularly to a kind of GREEB HEDGE MACHINE with sawing function.

Background technology

The greenbelts such as the increase of consciousness, attention of the government to urban green coverage rate, city, cell, street are afforested with people Area be continuously increased, the electric tool for maintenance tree wattled wall is also developed rapidly, and species is increasing.GREEB HEDGE MACHINE is A kind of relatively conventional electric tool for pruning hedge wall, because having the spies such as powerful is stable, performance is high, power is big Point, is widely used.The blade of existing GREEB HEDGE MACHINE typically has fixed cutting diameter, can only shear maximum cutting diameter with Under branch, it is difficult to the thicker branch of cut-out, stall situation is susceptible to when thicker branch is cut, influence motor uses the longevity Life, even burn-down of electric motor can be caused when serious.

Utility model content

In order to solve shortcoming and defect present in above-mentioned prior art, the utility model provides a kind of with sawing work( And can cut off the GREEB HEDGE MACHINE compared with fat tree branch.

In order to realize above-mentioned technical purpose, the GREEB HEDGE MACHINE with sawing function that the utility model is provided, including engine Structure, transmission mechanism and blade mechanisms, actuating unit drive blade mechanisms to run by transmission mechanism, and blade mechanisms include filling up and down The relative cutter and bottom knife for moving back and forth, at least side and bottom knife length side of cutter length direction when putting and running To at least side be interval with multiple tooth positions, the cutter and bottom knife are provided with saw cutting mechanism.

Preferably, the saw cutting mechanism is included located at the upper sawing tooth of cutter length direction sidepiece and long located at bottom knife The limiting tooth of direction sidepiece is spent, upper sawing tooth and relative the moving back and forth of limiting tooth realize sawing.

Preferably, the homonymy of the bottom knife length direction is provided with least two limiting tooths, and the saw cutting mechanism also includes Lower sawing tooth between two adjacent limiting tooths.

Preferably, the profile of the lower sawing tooth is consistent with the profile of upper sawing tooth, the outer circumferential side and lower saw of upper sawing tooth The outer circumferential side of cutting is equipped with cutting edge.

Preferably, the both sides of the cutter length direction and the both sides of bottom knife length direction are interval with multiple teeth Position；The upper sawing tooth is provided with two pairs, and center line of the sawing tooth on cutter length direction is symmetrical in each pair；The limiting tooth Two pairs are provided with, center line of each pair limiting tooth on bottom knife length direction is symmetrical.

Preferably, the blade mechanisms are provided with the rear end and the front end away from transmission mechanism being connected with transmission mechanism, two pairs Upper sawing tooth is respectively arranged at the 4th tooth position of the cutter from rear end forward extreme direction, the 5th tooth position, two pairs of limiting tooths difference At the 4th tooth position, the 6th tooth position located at bottom knife from rear end forward extreme direction, lower sawing tooth located at bottom knife from rear end to At the 5th tooth position on preceding extreme direction.

Preferably, cutter tooth is provided with remaining tooth position of the cutter, the width of upper sawing tooth tooth root is more than upper cutter tooth The width of tooth root, and the tall and big tooth in upper cutter tooth of tooth of upper sawing tooth is high；Lower cutter tooth is provided with remaining tooth position of the bottom knife, The width of limiting tooth tooth root is more than the width of lower cutter tooth tooth root, and the tall and big tooth in lower cutter tooth of tooth of limiting tooth is high.

Preferably, the upper sawing tooth and upper cutter tooth are in isosceles trapezoid, the larger parallel edges of upper sawing tooth width and upper The larger parallel edges of cutter tooth width is set to one with cutter；The limiting tooth and lower cutter tooth are in pointed, and limiting tooth is with The width of cutter tooth reduces from bottom knife to the direction away from bottom knife.

Preferably, the cutter is provided with driving hole positioned at the end of rear end, and bottom knife is located on the end of rear end It is provided with underdrive hole；The transmission mechanism includes gear, rotating shaft and eccentric wheel, and axis hole, the one of gear are provided with the axle center of gear Side is provided with boss, and eccentric wheel is provided with the fixing hole of disalignment, and boss is flush-mounted in driving hole, and eccentric wheel is flush-mounted in down and passes In dynamic hole, the two ends difference fixed cover of rotating shaft is loaded in axis hole and fixing hole.

Preferably, the blade mechanisms also include ceiling molding, bracket, lower press strip and screw, divide on ceiling molding, lower press strip Through hole, lower through-hole not being provided with, bar hole, lower bar hole being respectively equipped with cutter, bottom knife, bracket is provided with screw thread Hole, screw passes through lower through-hole, the lower bar hole of bottom knife, the upper bar hole of cutter and the upper compressing tablet of lower sheeting from bottom to top Twisted after upper through hole in the screwed hole of bracket.

After adopting the above technical scheme, the GREEB HEDGE MACHINE with sawing function that the utility model is provided has the following advantages that：

1st, the GREEB HEDGE MACHINE with sawing function that the utility model is provided, the blade mechanisms to existing GREEB HEDGE MACHINE are changed Enter, saw cutting mechanism is set between cutter and bottom knife, for cutting off thicker branch, increase the cutting model of GREEB HEDGE MACHINE Enclose, effectively increase the versatility of GREEB HEDGE MACHINE.

2nd, saw cutting mechanism includes upper sawing tooth and limiting tooth, and limiting tooth makes thicker branch keep relatively fixed position, Upper sawing tooth moves back and forth relative to limiting tooth carries out sawing to branch, improves sawing stability, it is to avoid branch is in sawing process In oscillate influence sawing effect.

The 3rd, lower sawing tooth be set between two adjacent limiting tooths, during the thicker branch of sawing, lower sawing tooth ibid sawing Tooth participates in sawing together, the time required to can effectively shortening sawing, improves the operating efficiency of sawing.

4th, the outer circumferential side of the outer circumferential side of upper sawing tooth and lower sawing tooth is respectively provided with cutting edge, the top of upper and lower sawing tooth and outer Side is respectively provided with sawing ability, and the sawing scope of upper and lower sawing tooth is big, can effectively improve the operating efficiency of sawing.

5th, upper sawing tooth is symmetrically arranged two pairs on cutter length direction center line, and limiting tooth is on bottom knife length Direction center line is symmetrically arranged two pairs, can simultaneously meet the behaviour of the user of left hand accustomed to using and the user of the right hand accustomed to using Work is accustomed to, and effectively improves the versatility of GREEB HEDGE MACHINE.

6th, two pairs of upper sawing teeth are respectively arranged at the 4th tooth position, the 5th tooth position, the two pairs of limiting tooths be respectively arranged on the 4th tooth position, At 6th tooth position, upper sawing tooth and limiting tooth are closer to transmission mechanism.During work, produced after cutter and bottom knife stress Amount of deflection is small, it is to avoid cutter and bottom knife occur expendable deformation because amount of deflection is excessive, advantageously ensure that making for blade mechanisms Use the life-span.

7th, the width of upper sawing tooth tooth root is more than the width of upper cutter tooth tooth root, and the intensity of sawing tooth in raising meets it The requirement of sawing work.The tall and big tooth in upper cutter tooth of tooth of upper sawing tooth is high, it is ensured that upper sawing tooth has enough sawing diameters.

8th, limiting tooth and lower cutter tooth are in pointed, and both width reduce from bottom knife to the direction away from bottom knife, right Cut branch has guide effect, while stall caused by preventing thick branch because stretching into too deep and stuck blade, keeps away Exempt from motor because overheat causes to burn.

9th, transmission mechanism realizes the crisscross motion back and forth between upper and lower blade using eccentric wheel structure, and simple structure is realized Mode is effective.Boss is flush-mounted in driving hole, and eccentric wheel is flush-mounted in underdrive hole, compact conformation, is conducive to reducing transmission The volume of mechanism.

Brief description of the drawings

Fig. 1 has the blast of transmission mechanism and blade mechanisms in the GREEB HEDGE MACHINE embodiment one of sawing function for the utility model View；

Fig. 2 has the top view of cutter in the GREEB HEDGE MACHINE embodiment one of sawing function for the utility model；

Fig. 3 has the top view of bottom knife in the GREEB HEDGE MACHINE embodiment one of sawing function for the utility model；

Fig. 4 has the vertical view of blade mechanisms original state in the GREEB HEDGE MACHINE embodiment one of sawing function for the utility model Figure；

Bottom knife runs to extreme position backward during Fig. 5 has the GREEB HEDGE MACHINE embodiment one of sawing function for the utility model When top view；

Bottom knife is run forward to extreme position during Fig. 6 has the GREEB HEDGE MACHINE embodiment one of sawing function for the utility model When top view.

In figure, 1- cutters, the upper sawing teeth of 11-, the upper cutters tooth of 12-, the upper driving holes of 13-, the upper bar holes of 14-, 2- bottom knife, 21- limiting tooths, sawing tooth under 22-, cutter tooth under 23-, 24- underdrives hole, bar hole under 25-, 3- gears, 31- axis holes, 32- is convex Platform, 4- rotating shafts, 5- eccentric wheels, 51- fixing holes, 61- dividing plates, 62- backing plates, 63- bearing pins, 64- screws, 7- ceiling moldings lead on 71- Hole, 8- brackets, press strip under 9-, 91- lower through-holes.

Specific embodiment

The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.

Embodiment one

The utility model embodiment one provide the GREEB HEDGE MACHINE with sawing function, including actuating unit, transmission mechanism and Blade mechanisms, actuating unit drives blade mechanisms to run by transmission mechanism.

As shown in figure 1, blade mechanisms include the relative cutter 1 and bottom knife 2 for moving back and forth when down devices and operation, At least side of the length direction of cutter 1 and at least side of the length direction of bottom knife 2 are interval with multiple tooth positions, cutter Saw cutting mechanism is provided between 1 and bottom knife 2, for cutting off thicker branch, increases the cut coverage of GREEB HEDGE MACHINE, effectively improved green The versatility of hedge machine.

As shown in Figure 2 and Figure 3, saw cutting mechanism includes being located at the upper sawing tooth 11 of the length direction sidepiece of cutter 1 and is located at down Relative the moving back and forth of the limiting tooth 21 of the length direction sidepiece of blade 2, upper sawing tooth 11 and limiting tooth 21 realizes sawing.Limiting tooth 21 Thicker branch is set to keep relatively fixed position, upper sawing tooth 11 moves back and forth relative to limiting tooth 21 to be sawed to branch Cut, improve sawing stability, it is to avoid branch oscillates in sawing process influences sawing effect.

In the present embodiment, the homonymy of the length direction of bottom knife 2 is provided with least two limiting tooths 21, and saw cutting mechanism also includes setting Lower sawing tooth 22 between two adjacent limiting tooths 21.The profile of lower sawing tooth 22 is consistent with the profile of upper sawing tooth 11, on The outer circumferential side of the outer circumferential side of sawing tooth 11 and lower sawing tooth 22 is equipped with cutting edge.The top and outside of upper and lower sawing tooth are respectively provided with Sawing ability, the sawing scope of upper and lower sawing tooth is big, can effectively improve the operating efficiency of sawing.

Specific in the present embodiment, cutter 1 and bottom knife 2 are double-edged blade, the both sides of the length direction of cutter 1 and The both sides of the length direction of bottom knife 2 are interval with multiple tooth positions.Upper sawing tooth 11 is provided with two pairs, in each pair sawing tooth 11 on The center line of the length direction of cutter 1 is symmetrical.Limiting tooth 21 is provided with two pairs, and each pair limiting tooth 21 is on the length direction of bottom knife 2 Center line it is symmetrical.Lower sawing tooth 22 is provided with a pair, and two center lines of the lower sawing tooth on the length direction of bottom knife 2 are symmetrical.

Upper sawing tooth 11 is symmetrically arranged two pairs on the length direction center line of cutter 1, and limiting tooth 21 is on bottom knife 2 Length direction center line is symmetrically arranged two pairs, can simultaneously meet the user of left hand accustomed to using and the user of the right hand accustomed to using Operating habit, effectively improve the versatility of GREEB HEDGE MACHINE.

One end that blade mechanisms are connected with transmission mechanism is rear end A, and the one end away from transmission mechanism is front end B.On two pairs Sawing tooth 11 is respectively arranged at the 4th tooth position of the cutter 1 from the A forward end B directions of rear end, the 5th tooth position, two pairs of limiting tooths 21 It is respectively arranged at the 4th tooth position of the bottom knife 2 from the A forward end B directions of rear end, the 6th tooth position, lower sawing tooth 22 is located at bottom knife At 2 the 5th tooth position from the A forward end B directions of rear end.

Upper sawing tooth 11 and limiting tooth 21 are closer to transmission mechanism, during work, are produced after cutter 1 and the stress of bottom knife 2 Raw amount of deflection is small, it is to avoid cutter 1 and bottom knife 2 occur expendable deformation because amount of deflection is excessive, advantageously ensure that rolling reamer machine The service life of structure.

Cutter tooth 12 is provided with remaining tooth position of cutter 1, the width of the upper tooth root of sawing tooth 11 is more than upper cutter tooth tooth root 12 Width, the intensity of sawing tooth 11 in raising, make its meet sawing work requirement.The tooth of upper sawing tooth 11 is tall and big in upper cutter tooth 12 tooth is high, it is ensured that upper sawing tooth 11 has enough sawing diameters.

In specific to the present embodiment, upper sawing tooth 11 and upper cutter tooth 12 are in isosceles trapezoid, and the upper width of sawing tooth 11 is larger Parallel edges and the larger parallel edges of the width of upper cutter tooth 12 be set to cutter 1 one, between upper sawing tooth 11 and cutter 1 And the fillet for seamlessly transitting is provided between upper cutter tooth 12 and cutter 1, the both sides of upper cutter tooth are provided with the cutting edge for shearing.

It is provided with lower cutter tooth 23 at remaining tooth position of bottom knife 2, the outer circumferential side of limiting tooth 21 and lower cutter tooth is not provided with cutting edge. The width of the tooth root of limiting tooth 21 is more than the width of the tooth root of lower cutter tooth 23, and the tall and big tooth in lower cutter tooth 23 of tooth of limiting tooth 21 is high.

Specific in the present embodiment, limiting tooth 21 and lower cutter tooth 23 are in pointed, the width of limiting tooth 21 and lower cutter tooth 23 Reduce to the direction away from bottom knife from bottom knife 2.23 pairs of cut branches of limiting tooth 21 and lower cutter tooth have guide effect, Stall caused by thick branch can be prevented because stretching into too deep and stuck blade simultaneously, it is to avoid motor causes to burn because of overheat.

The end that cutter 1 is located at rear end A is provided with driving hole 13, and the end that bottom knife 2 is located at rear end A is provided with down Driving hole 24.In the present embodiment, upper driving hole 13 and underdrive hole 24 are mounting hole, and upper and lower driving hole length direction It is respectively perpendicular to the length direction of upper and lower blade.

Transmission mechanism includes gear 3, rotating shaft 4 and eccentric wheel 5, and the axis hole coordinated with rotating shaft 4 is provided with the axle center of gear 3 31, gear 3 being provided with boss 32 towards the side of cutter 1, eccentric wheel 5 be provided with disalignment and with consolidating that rotating shaft 4 coordinates Determine hole 51.The diameter of boss 32 is consistent with the width of upper driving hole 13, the diameter of eccentric wheel 5 and the width one in underdrive hole 24 Cause.Boss 32 is flush-mounted in driving hole 13, and eccentric wheel 5 is flush-mounted in underdrive hole 24, and the two ends of rotating shaft 4 are fixed respectively to be set with In axis hole 31 and fixing hole 51.

In the present embodiment, dividing plate 61 is provided between cutter 1 and bottom knife 2, the lower section of bottom knife 2 is provided with backing plate 62, every The circular hole passed through for rotating shaft 4 is equipped with plate 61 and backing plate 62.It is additionally provided with bearing pin 63 between gear 3 and eccentric wheel 5, boss 32, The pin-and-hole that supply and marketing axle 63 is passed through is equipped with eccentric wheel 5, backing plate 61 and dividing plate 62.

Blade mechanisms also include ceiling molding 7, bracket 8, lower press strip 9 and screw 64, and ceiling molding 7 is spaced sets along its length There are through hole 71 in multiple, lower press strip 9 is interval with multiple lower through-holes 91 along its length, and bracket 8 is spaced sets along its length There are multiple screwed holes.Cutter 1 is interval with bar hole 14 in multiple along its length, and bottom knife 2 is spaced sets along its length There is bar hole 25 under multiple, the length direction of upper and lower bar hole is consistent with the length direction of upper and lower blade.Screw 64 from lower and On through the upper of the lower through-hole 91 of lower sheeting 9, the lower bar hole 25 of bottom knife 2, the upper bar hole 14 of cutter 1 and upper compressing tablet 7 Through hole 71, then twists in the screwed hole of bracket 8.

As shown in figure 4, when blade mechanisms are in initial position, the upper cutter tooth 12 of cutter 1 and the lower cutter tooth 23 of bottom knife 2 Stagger, upper sawing tooth 11 is located between limiting tooth 21 and lower sawing tooth 22.Moved back and forth to improve cutter 1 and bottom knife 2 When shearing scope, unilateral unilateral many tooth positions than cutter 1 of bottom knife 2.

Actuating unit drive gear 3 is rotated, and gear 3 is rotated by rotating shaft 4 when rotating with movable eccentric wheel 5, and eccentric wheel 5 is rotated When drive bottom knife 2 move back and forth relative to cutter 1.

As shown in figure 5, when actuating unit drives the rear end A of bottom knife 2 to move to extreme position by transmission mechanism, lower knife Tooth 23 and upper cutter tooth 12 overlap, and cutter 1 surmounts a tooth position, the i.e. upper slitter of the tooth position of cutter 1 first relative to bottom knife 2 Tooth 12 overlaps with the lower cutter tooth 23 of the tooth position of bottom knife 2 second, by that analogy.

As shown in fig. 6, when actuating unit drives the forward end B of bottom knife 2 to move to extreme position by transmission mechanism, upper slitter Tooth 12 and lower cutter tooth 23 overlap, and the upper cutter tooth 12 of the first tooth position overlaps with the lower cutter tooth 23 of the first tooth position, by that analogy, lower knife One lower cutter tooth of the front end of piece 2 is vacated.

When repairing thinner branch, branch is stretched between adjacent lower cutter tooth 23, and bottom knife 2 backhauls relative to cutter 1 Branch movement, edge contacts when branch is moved with the both sides of upper cutter tooth 12, the cutting edge cut-out branch of upper cutter tooth are driven when dynamic.

When repairing thicker branch, branch is set to be located between adjacent limiting tooth 21, bottom knife 2 is relative to cutter 1 back and forth Branch is driven to move back and forth relative to upper sawing tooth 11 and lower sawing tooth 22 during motion, in moving process, the top of upper sawing tooth 11 Cutting edge and the cutting edge at the top of lower sawing tooth 22 sawing is carried out to branch, consistent with conventional sawing-like motion, branch is by sawing depth Gradually deepen until completely cutting through.

In addition to above preferred embodiment, the utility model also has other implementation methods, and those skilled in the art can be with root It is variously modified according to the utility model and is deformed, without departing from spirit of the present utility model, the utility model all should be belonged to Scope as defined in the claims.

Claims

1. a kind of GREEB HEDGE MACHINE with sawing function, including actuating unit, transmission mechanism and blade mechanisms, actuating unit is by passing Motivation structure drives blade mechanisms operation, and blade mechanisms include the relative cutter and lower knife for moving back and forth when down devices and operation Piece, at least side of cutter length direction and at least side of bottom knife length direction are interval with multiple tooth positions, and it is special Levy and be, the cutter and bottom knife are provided with saw cutting mechanism.

2. the GREEB HEDGE MACHINE with sawing function according to claim 1, it is characterised in that the saw cutting mechanism includes being located at The upper sawing tooth of cutter length direction sidepiece and the limiting tooth located at bottom knife length direction sidepiece, upper sawing tooth and limiting tooth Relative moving back and forth realizes sawing.

3. the GREEB HEDGE MACHINE with sawing function according to claim 2, it is characterised in that the bottom knife length direction Homonymy is provided with least two limiting tooths, and the saw cutting mechanism also includes the lower sawing tooth between two adjacent limiting tooths.

4. the GREEB HEDGE MACHINE with sawing function according to claim 3, it is characterised in that the profile of the lower sawing tooth with The profile of upper sawing tooth is consistent, and the outer circumferential side of the outer circumferential side of upper sawing tooth and lower sawing tooth is equipped with cutting edge.

5. the GREEB HEDGE MACHINE with sawing function according to claim 3 or 4, it is characterised in that the upper slitter leaf length side To both sides and the both sides of bottom knife length direction be interval with multiple tooth positions；The upper sawing tooth is provided with two pairs, in each pair Center line of the sawing tooth on cutter length direction is symmetrical；The limiting tooth is provided with two pairs, and each pair limiting tooth is on bottom knife The center line of length direction is symmetrical.

6. the GREEB HEDGE MACHINE with sawing function according to claim 5, it is characterised in that the blade mechanisms are provided with and biography The rear end and the front end away from transmission mechanism of motivation structure connection, two pairs of upper sawing teeth are respectively arranged on cutter from rear end forward end side At the 4th tooth position upwards, the 5th tooth position, two pairs of limiting tooths are respectively arranged on fourth tooth of the bottom knife from rear end forward extreme direction At position, the 6th tooth position, lower sawing tooth is located at bottom knife at the 5th tooth position from rear end forward extreme direction.

7. the GREEB HEDGE MACHINE with sawing function according to claim 6, it is characterised in that remaining tooth position of the cutter Place is provided with cutter tooth, the width of the width more than upper cutter tooth tooth root of upper sawing tooth tooth root, and the tooth of upper sawing tooth is tall and big in upper slitter The tooth of tooth is high；Lower cutter tooth, the width of the width more than lower cutter tooth tooth root of limiting tooth tooth root are provided with remaining tooth position of the bottom knife Degree, the tall and big tooth in lower cutter tooth of tooth of limiting tooth is high.

8. the GREEB HEDGE MACHINE with sawing function according to claim 7, it is characterised in that the upper sawing tooth and upper cutter tooth It is in isosceles trapezoid, the larger parallel edges of upper sawing tooth width and the larger parallel edges of upper slitter tooth width are set to one with cutter Body；, in pointed, the width of limiting tooth and lower cutter tooth is from bottom knife to the direction away from bottom knife for the limiting tooth and lower cutter tooth Reduce.

9. the GREEB HEDGE MACHINE with sawing function according to claim 6, it is characterised in that the cutter is located at rear end End is provided with driving hole, and the end that bottom knife is located at rear end is provided with underdrive hole；The transmission mechanism includes gear, turns Axle and eccentric wheel, are provided with axis hole at the axle center of gear, the side of gear is provided with boss, and eccentric wheel is provided with the fixation of disalignment Hole, boss is flush-mounted in driving hole, and eccentric wheel is flush-mounted in underdrive hole, the two ends of rotating shaft difference fixed cover loaded on axis hole and In fixing hole.

10. the GREEB HEDGE MACHINE with sawing function according to claim any one of 1-4, it is characterised in that the rolling reamer machine Structure also includes ceiling molding, bracket, lower press strip and screw, and through hole, lower through-hole, upper slitter are respectively equipped with ceiling molding, lower press strip Bar hole, lower bar hole are respectively equipped with piece, bottom knife, bracket is provided with screwed hole, and screw passes through push from bottom to top The spiral shell in bracket is twisted after the upper through hole of the lower through-hole of piece, the lower bar hole of bottom knife, the upper bar hole of cutter and upper compressing tablet In pit.