CN201235555Y - Plastics pipe cutting knife tool - Google Patents

Abstract

The utility model relates to a plastic pipe cutting knife tool which comprises a casing with a handle. A lower knife carrier and an upper blade which is matched with the lower knife carrier to form a cutting edge and can rotate are fixedly mounted in the casing. The plastic pipe cutting knife tool is characterized in that an electric motor and a power supply part are also arranged in the casing, wherein the electric motor is in driving connection with the upper blade through a transmission speed-shifting mechanism, and the power supply part is connected with the electric motor through a control switch to form a control loop. The utility model adopts electric cutting to lighten the labor intensity, is lightly hold by the hand and is convenient to carry and operate.

Description

Plastic tube cutter instrument

Technical field

The utility model relates to a kind of cutting tool, especially relates to cutting tool or devices such as cutting PVC plastic tube, PAP.

Background technology

Along with continuous progress in science and technology, various plastic tubes, PAP are constantly come into the work and the life occasion of numerous people, in using plastic tube such as PVC plastic tube process, often need use cutter and cut plastic tube, make it reach the length that needs, the cutter or the cutter of the suitable cutting plastic tube that for this reason has a lot of scientific and technical personnel constantly to develop to make new advances.

As the patent No. is that 200720109332.9 Chinese patent " is convenient to cut the rotary-cut cutter of large-diameter pipe ", then its defective adopt manually operated, the cutting relatively effort of getting up, structure is more complicated also, and volume is big, heaviness, the cost height is so require further improvement design.

As my Chinese patent of 200720110120.2 of the patent No. " sub-cutter of jaw type pvc pipe with fast automatic withdrawing structure; also have similar problem; need manual operation; the cutting relatively effort of getting up; complex structure; cost height, particularly retraction mechanism be compact and reasonable not enough, requires further improvement.

The utility model content

Primary technical problem to be solved in the utility model provides a kind of electronic cutting, reduces labour intensity, hands light and handy, as to be easy to carry operation plastic tube cutter instrument.

Another technical problem to be solved in the utility model provide a kind of simple and practical, compact, volume is little can rapid return plastic tube cutter instrument.

The technical scheme that the above-mentioned primary technical problem that solves the utility model adopts is: a kind of plastic tube cutter instrument, and it includes:

One has the casing of handle;

Be mounted with knife rest in the casing and cooperate and form cutting mouth, and rotatable blade with knife rest;

It is characterized in that also being furnished with in the casing motor;

Making motor be to drive by transmission shifting mechanism and described blade is connected;

Also be furnished with power unit in the casing, connect into control loop by gauge tap and motor.

As further improvement, described transmission shifting mechanism includes:

Be fixed on the speed change frame in the casing, by a plurality of parallel pinion shaft, be nested with stepped duplicate gear separately on the speed change frame;

Duplicate gear is connected with a joggle successively, constitutes multi-change speed mechanism;

And the gear on last duplicate gear is connected with the local gears engaged of blade afterbody;

Be furnished with the room of avoiding transmission respectively on the local gear front and back position of blade afterbody.Like this, by the parallel axes column gear transmission mode in the fixed shaft gear train, it is little to reach volume, and gear ratio is big, stable performance, and intensity height and long service life effect,

The all right another kind of version of described transmission shifting mechanism, it includes:

Be fixed on the speed change frame in the casing, rotatable worm screw be installed on the speed change frame,

Worm screw is connected with the output shaft of motor directly or indirectly by shaft coupling,

Worm screw also is connected with the local gears engaged of blade afterbody,

Be furnished with the room of avoiding transmission respectively on the local gear front and back position of blade afterbody.

Certainly also comprise the common combinations mode that other has equivalent effect.And the room of avoiding transmission on the local gear front and back position of blade, can avoid duplicate gear further to mesh the driving blade, after in case the blade rotary-cut puts in place, motor just can not drive blade by transmission shifting mechanism, structure is more reasonable and practical, security is good, can prolong the service life of blade.

Further improve, knife rest is divided into left and right sides two parts, middle liner spacing shim, and to form appropriate gap, blade is arranged in the gap with axle, and knife rest left and right sides two parts are through on the pivot pin, and involutory back is fixed with nut.So both made things convenient between blade and the knife rest and formed cutting knife, can avoid again blade directly cutting in conjunction with the room of avoiding transmission on the local gear front and back position of blade afterbody, play safety and limit effect on knife rest and deflect.

Further improve, described motor is fixed on the lower slide, and the output of motor has gearbox, makes output shaft on the gearbox pass that through hole and gear middle gear are connected with a joggle on the lower slide.The installing and fixing property of motor so further is provided, simultaneously,, improves the cutting torsion of blade by speed change.

As improvement, described power unit adopts rechargeable battery, is arranged in the battery cavities of handle, is connected with charging socket on the handle end, perhaps adopts solar cell, and the solar cell card is contained on the surface of casing.

The technical scheme part that the present invention solves another technical problem is such: on above-mentioned basis, in the end be furnished with the clutch that blade is resetted between the local gear of duplicate gear and blade afterbody in the described transmission shifting mechanism, accordingly, be furnished with the reseting elastic element that makes its trend that resets on the blade.Can make the quick rollback of blade like this, not need motor to reverse to drive blade to reset, save energy consumption, increase work efficiency effectively, under equal energy condition, can prolong the working time of cutting tool.

As improvement, described clutch is in the end to be furnished with clutch spring or the clutch flexure strip that makes the left and right sides slippage of described duplicate gear between duplicate gear and speed change frame or the casing, this duplicate gear becomes clutch gear, accordingly, in the casing surface arrangement button hole is arranged, be provided with SR in the button hole, be furnished with button spring between SR and the knife rest or between the casing, simultaneously, the inboard position of SR is to conflict to cooperate with the side of duplicate gear directly or indirectly, under the SR down state, described duplicate gear is broken away from be connected with the local gear meshing of blade afterbody.This clutch is simple and practical, and parts are little, makes easily, and operation is very easy, blade reset and clutch rapid.

As preferably, described clutch spring or clutch flexure strip are nested with on the parallel pinion shaft of clutch gear, so that clutch spring or clutch flexure strip are installed and be fixing.

At last, described reseting elastic element employing torsion spring is nested with on the axle of blade or on the nut, an end of torsion spring is connected on the blade.Certainly, reseting elastic element also can adopt extension spring, plays similar effect.

Compared with prior art, advantage of the present utility model is: adopt the motor drives blade to be rotated cutting, need not manual operation and drive blade rotation, thus reduce labour intensity greatly, the hand-held handle, relatively lighter and handier, operation is easy to carry; Adopt by the parallel axes column gear transmission mode in the fixed shaft gear train, it is little to reach volume, and gear ratio is big, stable performance, intensity height and long service life effect, and the room of avoiding transmission on the local gear front and back position of blade, can avoid duplicate gear further to mesh the driving blade, in case after the blade rotary-cut puts in place, motor just can not drive blade by transmission shifting mechanism, structure is more reasonable and practical, and security is good, can prolong the service life of blade; Adopt unique clutch, organically combine with duplicate gear, volume is little, compactness, and parts are few, structure is simple and practical, thereby make the quick rollback of blade, do not need motor to reverse to drive blade to reset, save energy consumption, increase work efficiency effectively, under equal energy condition, can prolong the working time of cutting tool.

Description of drawings

Fig. 1 is the structure chart of plastic tube cutter instrument;

Fig. 2 for the A-A of Fig. 1 to cutaway view (90 degree turn to);

Fig. 3 for the B-B of Fig. 1 to cutaway view (90 degree turn to);

Fig. 4 is the stereochemical structure exploded view of plastic tube cutter instrument;

Fig. 5 is the structure chart of plastic tube cutter instrument;

Fig. 6 is the blade schematic diagram;

Fig. 7 is another kind of transmission shifting mechanism schematic diagram;

Fig. 8 a, 8b are another kind of clutch schematic diagram;

Fig. 9 a, 9b are the third clutch schematic diagram;

Figure 10 a, 10b are the 4th kind of clutch schematic diagram.

1. left shell; 2. clamp nut; 3. speed change frame; 4. pad; 5. drive pinion; 6,6-1,6-2. duplicate gear; 7. clutch spring; 8. clutch gear; 9. left knife rest sheet; 10. gear shaft; 11. blade; 11a. blade circular hole; 11b. the local gear of blade afterbody; Room 11c; 12. gauge tap; 12a. the Metal Contact sheet is right in the gauge tap; 13. limit shaft; 14. spacing shim; 15. right knife rest sheet; 16. torsion spring; 17. back-moving spring; 18. SR, 18a. SR fore-set; 19. output shaft; 20. gearbox; 21. motor; 22. power unit; 23. charging socket; 24. right shell body; 25. installation cavity; 26. handle; 27. battery cavities; 28. knife rest; 29. button hole; 30. worm screw; 31. axle;

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Examples of implementation 1, as Fig. 1-6 signal, a kind of plastic tube cutter instrument, it includes the casing that has handle, casing is divided into left casing 1 and right casing 24, left and right sides casing is to altogether, be screwed and just constituted casing, casing top presents the jaw shape, the middle and upper part is the installation cavity 25 of expansion shape, be used for installing motor 21, transmission shifting mechanism, knife rest 28 critical pieces such as grade, and the middle and lower part of casing is a cardinal principle bowhandle 26, mainly is battery cavities 27 in the handle 26, and battery cavities 27 is used for installing the more piece rechargeable battery as power unit 22, handle 26 ends are furnished with charging socket 23, constitute charging circuit by connecting line and rechargeable battery, arrange gauge tap 12 and the action button that cooperates thereof in the front side of handle 26, the Metal Contact sheet is to 12a in the gauge tap, cooperate with action button, make motor and rechargeable battery, gauge tap constitutes control loop.Wherein be screwed speed change frame 3 at installation cavity 25, pass through a plurality of parallel gear shafts 10 on the speed change frame 3, be nested with stepped duplicate gear 6 separately, wherein duplicate gear 6 has 5, duplicate gear 6 is connected with a joggle successively, constitute gear, motor 21 is fixed on the knife rest 28, the output of motor 21 has gearbox 20, output shaft 19 on the gearbox is equipped with drive pinion 5, pass through hole on the knife rest 28, be connected with a joggle with the gear wheel of first duplicate gear 6-1 in the gear.In cavity 25 is installed, also be furnished with knife rest 28 and blade 11, knife rest 28 shaped upper parts and jaw shape basically identical, knife rest 28 is divided into left and right sides two parts, left side knife rest sheet 9 and right knife rest sheet 15, middle liner spacing shim 14, to form appropriate gap, blade 11 is arranged in the gap by axle 31 rotationally, knife rest left and right sides two parts left side knife rest sheet 9 and right knife rest sheet 15 are through on the pivot pin, and involutory back is fixed with nut, has formed the knife rest 28 of band blade 11, blade 11 cooperates the formation cutting mouth with knife rest 28, be used for cutting plastic tube, in knife rest 28, also be furnished with limit shaft 13, excessive to prevent the blade rotation, certainly, also can utilize axle 31 to assemble into knife rest with limit shaft 13.Blade 11 afterbodys are furnished with local gear 11b, are respectively the room 11c that avoids transmission on the local gear 11b front and back position, and the local gear 11b on the blade afterbody is connected with the pinion of last duplicate gear 6-2 in the transmission shifting mechanism.In order to reach rapid return, the energy-conservation purpose of putting forward effect, in the transmission shifting mechanism in the end between the local gear of duplicate gear and blade afterbody, be furnished with the clutch that blade is resetted, and, be furnished with the reseting elastic element that makes its trend that resets on the blade.Clutch is to adopt fairly simple clutch gear structure, this clutch gear 8 is exactly last duplicate gear 6-2, this duplicate gear cover 6-2 is on the parallel pinion shaft 10 of oneself, also be nested with clutch spring 7 on the parallel pinion shaft 10, clutch spring 7 is supported on respectively between the side of both sides duplicate gear 6, certainly, also can adopt the clutch flexure strip, dual spring or volute spring form replace, be supported between clutch gear 8 and the speed change frame 3, play similar effects, specifically see Fig. 8 a, 8b, 9a, 9b, 10a, 10b, accordingly, have button hole 29 on the casing surface, one SR 18 is set in the button hole 29, be furnished with push-button reset spring 17 between SR 18 and the knife rest 28, simultaneously, SR 18 inboard positions are extended with fore-set 18a, pass the through hole on the knife rest 28, conflict together with duplicate gear side as clutch gear 8, under SR 18 down states, make this clutch gear 8 can overcome the elastic force of clutch spring, the local gear 11b of disengaging and blade afterbody meshes.The reseting elastic element of blade adopts torsion spring 16, and torsion spring 16 is nested with on the axle 31 of blade 11 or on the nut, an end of torsion spring 16 is connected on the blade circular hole 11a of blade.

Its operation principle is such: by gauge tap 12 motor 21 is rotated by power unit 22, gearbox 20 is installed on motor 21, make the revolution of motor 21 be reduced to certain rotating speed by gearbox 20, be passed to the gear that the duplicate gears 6 in the speed change frame 3 form by gearbox 21 again and carry out speed change again, be provided with clutch spring and clutch gear 8 in the gear train in speed change frame 3, and the gear in clutch gear 8 and the gear train keeps engagement, and can side-to-side movement guarantee to mesh with the local gear 11b of blade 11 afterbodys and separate, engagement is the local gear 11b engagement that makes clutch gear 8 and blade by the top power of conical clutch spring 7, separation be by housing expose outside a SR 18 downwards by, the compressing make clutch gear 8 leave the local gear 11b of blade.

When blade is in open configuration, and when clutch gear 8 separates with the local gear 11b of blade, when using pipe cutter cutting pipe pipe is placed jaw groove between blade 11 and the knife rest 28 as need, live gauge tap 12 with hand again, motor 21 and power unit 22 are connected, motor 21 entrys into service this moment, the motor 21 that rotates is by the rotation of the gear in the gear driven gearbox 20 and carry out speed change, by reducing rotating speed and improve intensity for further after the speed change of gearbox 20, output shaft after the gearbox speed change 19 usefulness gears are connected in 6 groups of the duplicate gears in the speed change frame 3, and drive the rotation of duplicate gear group and carry out speed change, clutch gear 8 was forced to and then rotate when the gear in the speed change frame 3 rotated, when clutch gear 8 forwards certain position to can be with the local gear 11b engagement of blade afterbody the time, be subjected to the top power effect of clutch spring 7 this moment, clutch gear 8 local gear 11b rapid and the blade afterbody are meshed, behind the local gear and clutch gear engagement of blade, blade 11 can rotate towards a direction, just can make this moment blade 11 tangentially need the pipe of cutting, up to cut-out, pipe cuts off the back and is not provided with the empty avoiding breach as room 12 because the local gear of blade is held, so pipe cuts off back blade 11 and also can stop operating, and avoids damaging the parts of pipe cutter.

This moment is as needing blade 11 returns, as long as push SR 18, push SR after, clutch gear 8 is forced to separate with the local gear 11b of blade, after the local gear 11b of blade leaves clutch gear 8, because the twisting resistance effect of torsion spring 16 resets blade 11 resilience rapidly.

Examples of implementation 2

A kind of plastic tube cutter instrument, it includes: one has the casing of handle; Be mounted with knife rest in the casing and cooperate and form cutting mouth, and rotatable blade with knife rest; Also be furnished with motor in the casing; Motor is with described blade by transmission shifting mechanism to be connected; Also be furnished with power unit in the casing, connect into control loop by gauge tap and motor.Wherein transmission shifting mechanism includes: be fixed on the speed change frame in the casing, rotatable worm screw 30 is installed on the speed change frame, worm screw 30 is connected with the output shaft of motor directly or indirectly by shaft coupling, worm screw 30 also is connected with a joggle with the local gear 11b of blade 11 afterbodys, be furnished with the room 11c that avoids transmission respectively on the local gear 11b front and back position of blade afterbody, specifically see Fig. 7, it does not have clutch, and other and examples of implementation are similar.

Claims (10)

1, a kind of plastic tube cutter instrument, it includes:

One has the casing of handle;

Be mounted with knife rest in the casing and cooperate and form cutting mouth, and rotatable blade with knife rest;

It is characterized in that also being furnished with in the casing motor;

Making motor be to drive by transmission shifting mechanism and described blade is connected;

Also be furnished with power unit in the casing, connect into control loop by gauge tap and motor.

2, plastic tube cutter instrument according to claim 1 is characterized in that described transmission shifting mechanism includes:

Be fixed on the speed change frame in the casing, by a plurality of parallel pinion shaft, be nested with stepped duplicate gear separately on the speed change frame;

Duplicate gear is connected with a joggle successively, constitutes multi-change speed mechanism;

And the gear on last duplicate gear is connected with the local gears engaged of blade afterbody;

Be furnished with the room of avoiding transmission respectively on the local gear front and back position of blade afterbody.

3, plastic tube cutter instrument according to claim 1 is characterized in that described knife rest is divided into left and right sides two parts, middle liner spacing shim, to form appropriate gap, blade is arranged in the gap with axle, and knife rest left and right sides two parts are through on the pivot pin, and involutory back is fixed with nut.

4, plastic tube cutter instrument according to claim 1 is characterized in that described motor is fixed on the knife rest, and the output of motor has gearbox, makes output shaft on the gearbox pass that through hole and gear middle gear are connected with a joggle on the knife rest.

5, plastic tube cutter instrument according to claim 1, it is characterized in that power unit adopts rechargeable battery, be arranged in the battery cavities of handle, be connected with charging socket on the handle end, perhaps adopt solar cell, the solar cell card is contained on the surface of casing.

6, according to any described plastic tube cutter of the claim instrument of claim 2 to 5, it is characterized in that in the described transmission shifting mechanism in the end being furnished with the clutch that blade is resetted between the local gear of a duplicate gear and blade afterbody, accordingly, be furnished with the reseting elastic element that makes its trend that resets on the blade.

7, plastic tube cutter instrument according to claim 6, it is characterized in that described clutch is in the end to be furnished with clutch spring or the clutch flexure strip that makes the left and right sides slippage of described duplicate gear between duplicate gear and speed change frame or the casing, this duplicate gear becomes clutch gear, accordingly, in the casing surface arrangement button hole is arranged, be provided with SR in the button hole, be furnished with button spring between SR and the knife rest or between the casing, simultaneously, the inboard position of SR is to conflict to cooperate with the side of duplicate gear directly or indirectly, under the SR down state, described duplicate gear is broken away from be connected with the local gear meshing of blade afterbody.

8, plastic tube cutter instrument according to claim 7 is characterized in that described clutch spring or clutch flexure strip are nested with on the parallel pinion shaft of clutch gear.

9, plastic tube cutter instrument according to claim 6 is characterized in that described reseting elastic element adopts torsion spring, is nested with on the axle of blade or on the nut, an end of torsion spring is connected on the blade.

10, plastic tube cutter instrument according to claim 1 is characterized in that described transmission shifting mechanism includes:

Be fixed on the speed change frame in the casing, rotatable worm screw be installed on the speed change frame,

Worm screw is connected with the output shaft of motor directly or indirectly by shaft coupling,

Worm screw also is connected with the local gears engaged of blade afterbody,

Be furnished with the room of avoiding transmission respectively on the local gear front and back position of blade afterbody.

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