CN109703252A

CN109703252A - A kind of cutting mechanism and penknife of penknife

Info

Publication number: CN109703252A
Application number: CN201910099869.9A
Authority: CN
Inventors: 雪松
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2019-05-03

Abstract

The present invention relates to a kind of cutting mechanisms of penknife, including pinion stand, knife rest and hobboing cutter, it is arranged on pinion stand to blade holder turns, hobboing cutter is arranged on knife rest, multiple extend spirally from top to bottom and along the circumferentially spaced blade of hobboing cutter is provided on the periphery wall of hobboing cutter, multiple hocks to match with blade are arranged at intervals on the internal perisporium of pinion stand, hobboing cutter is rotatably assorted by the engagement of blade and hock with pinion stand.Blade directly cooperates with hock, on the one hand reduces the quantity of part, so that entire cutting structure is simplified efficiently, failure rate is substantially reduced；On the other hand, after omitting transmission gear, gap between transmission gear and hobboing cutter has not just existed, clast residual after pencil cutting can not only be reduced, jumping between the transmission gear and hobboing cutter also avoided, improves stability, keeps cutting feel more stable, noise when cutting also greatly reduces simultaneously, achieves many things at one stroke；The invention additionally relates to the penknifes with the cutting mechanism.

Description

A kind of cutting mechanism and penknife of penknife

Technical field

The present invention relates to the cutting mechanisms and penknife of cutting the pen or shape tool field more particularly to a kind of penknife.

Background technique

Penknife is a kind of relatively conventional stationery, and when entering market earliest, penknife is only the most basic The tool that sharpens a pencil, however as the increase of pencil use demand, the quality and speed that people sharpen a pencil to penknife have Higher requirement, therefore, the penknife to sharpen a pencil automatically are developed, currently, either hand-rail type or DYN dynamic Automatic penknife, the structure that sharpens a pencil of core are that bracket and hobboing cutter is arranged in the inside of shell, and a shaft passes through the rolling Knife and hobboing cutter is connected on bracket, the transmission gear that driving device is meshed, such as Patent No. are additionally provided on hobboing cutter The Chinese utility model patent " the cutter heart shaft configurations of penknife cutting mechanism improve " of CN201420577786.9 discloses This wants a kind of penknife, which includes knife-post bracket, spiral cutter and cutter heart shaft, is equipped with and cuts in knife-post bracket bottom end Slot, two side ends are equipped with hollow pivot ear respectively and have the chucking lug of pivot hole, and spiral cutter is fixed on tool apron by cutter heart shaft Between the pivot ear and chucking lug of bracket, i.e., the assembly of above-mentioned hobboing cutter and bracket needs hobboing cutter ontology, transmission gear, shaft and is used to The locking member of fixed rotating shaft is constituted, and is applied although this cutting mechanism is more universal in hand-rail type or DYN dynamic penknife In, but still there is certain defect:

1, multiple parts are needed to cooperate in the inside of entire penknife, bracket and hobboing cutter installation, the core cooperation to sharpen a pencil Structure is still complex, not only increases the difficulty of failure rate and maintenance, also adds production cost；

2, between multiple parts there is assembly gap, after sharpening a pencil remaining lead for retractable pencil powder and sawdust foam can fill up into In above-mentioned gap, the difficulty of cleaning is not only increased, if things go on like this also will cause the heel and toe wear of cutter head, shortening is entirely cut The service life of machine；

3, the gap between transmission gear and hobboing cutter will cause front and back in hobboing cutter rotation process and jump, and this jump directly is led Very big noise is generated when having caused to sharpen a pencil, usage experience is bad.

Summary of the invention

First technical problem to be solved by this invention is the status for the prior art, provides a kind of structure simple zero Part is few, is convenient to clean and the cutting mechanism of penknife that noise is small.

Second technical problem to be solved by this invention is the status for the prior art, and providing one kind has above-mentioned cut Cut the penknife of mechanism.

The technical scheme of the invention to solve the technical problem is: a kind of cutting mechanism of penknife, including tooth Wheel seat, knife rest and the hobboing cutter for sharpening pencil, the knife rest is arranged on pinion stand and energy opposed gear seat rotation, the rolling Knife is arranged on knife rest, is provided with multiple blades on the periphery wall of the hobboing cutter, each blade coiled coil, simultaneously from top to bottom Along the circumferentially-spaced arrangement of hobboing cutter, multiple hocks to match with blade, institute are arranged at intervals on the internal perisporium of the pinion stand Hobboing cutter is stated to be rotatably assorted by the engagement of blade and hock with pinion stand.

Preferably, range of each blade with respect to the spiral angle β of hobboing cutter central axes is 35 °~40 °, the hobboing cutter phase Range for the installation angle α of the rotary shaft of knife rest is 10 °~15 °, inclination angle of the hock relative to pinion stand axis Range beta-the α of degree is 20 °~30 °.

Alternatively, range of each blade with respect to the spiral angle β of hobboing cutter central axes is 28 °~34 °, the hobboing cutter is opposite In knife rest rotary shaft installation angle α range be 10 °~15 °, tilt angle of the hock relative to pinion stand axis Range beta-α be 13 °~24 °.

Specifically, the hock is 25 ° or 18 ° relative to the tilt angle of pinion stand axis

In order to guarantee the assembly of hobboing cutter and knife rest and reduce the number of parts of assembly, the both ends of the hobboing cutter are convexly equipped with first Protrusion and the second protrusion, the knife rest offer the through-hole passed through for the first protrusion, the knife rest on one end of pinion stand It is offered on the other end and accommodates groove therein for the second protrusion, the both ends of the hobboing cutter pass through the first protrusion and through-hole respectively Cooperation, the cooperation of the second protrusion and groove and be rotationally connected on the knife rest.

Hobboing cutter is being detached from knife rest in the rotation in order to prevent, and the second protrusion of limitation is additionally provided on the knife rest and is detached from The locating part of groove.

In order to guarantee secured limit of the locating part to hobboing cutter, the locating part is the stop collar with opening, the limit Ring set be set to knife rest on, and the first end of the stop collar can cover or part overlaid described in groove.

In order to guarantee to be assemblied in the hobboing cutter energy sharpening pencil on knife rest, axially offers on the knife rest and sharpen a pencil for be cut The cutting slot plugged, the opening for pencil insertion cutting slot is offered on the pinion stand, and the opening is connected with cutting slot； The hobboing cutter is obliquely installed adjacent to one end of pinion stand to one end far from pinion stand from knife rest, is assemblied on knife rest in hobboing cutter Under state, that one end of the hobboing cutter far from pinion stand can be partially accommodated in the cutting slot.

In order to guarantee that driving mechanism can be connect with knife rest, the knife rest is provided with connection driving machine far from one end of pinion stand The attachment base of structure offers the slot plugged for driving mechanism output shaft on the attachment base.

In order to guarantee that the output shaft of driving mechanism will not skid when driving knife rest, further, the inner circumferential of the slot It is provided with multiple circumferentially spaced arrangements on wall and the retaining convex rib that knife rest is rotated relative to driving mechanism output shaft can be limited, it is described Retaining convex rib extends radially inwardly to be formed along slot.

A kind of penknife with cutting mechanism, includes driving mechanism and driving member, and the power of the driving mechanism is defeated Outlet is connected with one end of driving member, and the other end of driving member is connected with knife rest, and knife rest opposed gear seat can be driven to rotate.

Compared with the prior art, the advantages of the present invention are as follows the cutting mechanism of the penknife, including pinion stand, knife rest and The hobboing cutter that can be in contact with the end to be cut to sharpen a pencil, knife rest is arranged on pinion stand and energy opposed gear seat rotation, hobboing cutter are set It sets on knife rest, multiple blades is provided on the periphery wall of hobboing cutter, each blade extends spirally from top to bottom and along the circumferential direction of hobboing cutter Arranged for interval, is arranged at intervals with multiple hocks to match with blade on the internal perisporium of pinion stand, and hobboing cutter passes through blade and tooth The engagement of pawl and be rotatably assorted with pinion stand.It is directly engaged with the hock of pinion stand to drive hobboing cutter to revolve by the cutter tooth of hobboing cutter Turn, transmission gear is omitted, on the one hand reduces the quantity of part, so that entire cutting mechanism is simplified efficiently, failure rate is significantly It reduces；On the other hand, after omitting transmission gear, the gap between transmission gear and hobboing cutter has not just existed, and can not only reduce Clast after pencil cutting remains, and jumping between the transmission gear and hobboing cutter also avoided improves stability, makes to cut feel It is more stable, while noise when cutting also greatly reduces, it achieves many things at one stroke.

Detailed description of the invention

Fig. 1 is that cutting mechanism is assemblied in the structural schematic diagram in penknife in the embodiment of the present invention；

Fig. 2 is the overall structure diagram of cutting mechanism in the embodiment of the present invention；

Fig. 3 is the decomposition texture schematic diagram of cutting mechanism in the embodiment of the present invention；

Fig. 4 is the decomposition texture schematic diagram of cutting mechanism middle gear seat and knife rest cooperation in the embodiment of the present invention；

Fig. 5 is the overall structure cross-sectional view of cutting mechanism in the embodiment of the present invention；

Fig. 6 is that hobboing cutter and the peace of the shaft of knife rest turn angle α and the opposite hobboing cutter central axes of blade in the embodiment of the present invention Spiral angle β angle schematic diagram.

Specific embodiment

The present invention will be described in further detail below with reference to the embodiments of the drawings.

It as shown in Figures 1 to 6, is a preferred embodiment of the present invention, in the present embodiment, the cutter of the penknife Structure includes pinion stand 1, knife rest 2 and hobboing cutter 3, and intermediate slide 2 is arranged on pinion stand 1 and energy opposed gear seat 1 rotates, and hobboing cutter 3 are arranged on knife rest 2, and rotate under the action of pinion stand 1 relative to knife rest 2, specifically, the periphery wall of above-mentioned hobboing cutter 3 On be provided with multiple blades 31, above-mentioned blade 31 coiled coil and the circumferentially-spaced arrangement along hobboing cutter 3 from top to bottom are corresponding , multiple hocks 11 to match with blade 31 are arranged at intervals on the internal perisporium of pinion stand 1, hobboing cutter 3 passes through blade 31 and tooth The engagement of pawl 11 and be rotatably assorted with pinion stand 1.

In the prior art, pinion stand 1 directly engages with the transmission gear that 3 end of hobboing cutter is arranged in and drives hobboing cutter 3 opposite Knife rest 2 rotates, due to the transmission gear using routine, as long as guaranteeing that the hock 11 on pinion stand 1 is matched with transmission gear , but in the present embodiment, above-mentioned transmission gear is simultaneously not present, in order to realize that hobboing cutter 3 is matched with the direct of pinion stand 1 It closes, above-mentioned hock 11 needs certain angle that this cooperation could be made to be achieved.

In the present embodiment, referring to Fig. 6, the range of angle is turned as α with the peace of the shaft 2b of above-mentioned hobboing cutter 3 and knife rest 2, Range with the spiral angle of opposite 3 central axes of hobboing cutter of blade 31 is β, above-mentioned the inclining relative to 1 axis of pinion stand of hock 11 The range of rake angle is β-α, in the actual production process, due to the cutter diameter difference of hobboing cutter 3, can be generally divided into two kinds, One is cutter diameter be 13mm~15mm hobboing cutter 3, blade 31 with respect to 3 central axes of hobboing cutter spiral angle β range be 35 °~ 40 °, and the range that hobboing cutter 3 and knife rest 2 install angle α is 10 °~15 °, therefore, hock 11 inclines relative to 1 axis of pinion stand The range of rake angle β-α is 20 °~30 °；

Another kind is the hobboing cutter 3 that cutter diameter is 7mm~10mm, model of the blade 31 with respect to the spiral angle β of 3 central axes of hobboing cutter Enclosing is 28 °~34 °, and the range of hobboing cutter 3 and the installation angle α of knife rest 2 is 10 °~15 °, and hock 11 is relative to 1 axis of pinion stand The range of tilt angle is that β-α is 13 °~24 °.In conclusion most preferably, cutter diameter is 13mm~15mm as most preferred Its hock 11 of hobboing cutter 3 relative to 1 axis of pinion stand tilt angle be 25 °；Cutter diameter is the hobboing cutter 3 of 7mm~10mm, hock 11 relative to 1 axis of pinion stand tilt angle be 18 °.It is worth noting that: above-mentioned β-α is blade 31 with respect to hobboing cutter 3 Difference of the spiral angle β and hobboing cutter 3 of central axes relative to the installation angle α of the rotary shaft 2b of knife rest 2.

In the present embodiment, it is rotated in order to facilitate hobboing cutter 3 relative to knife rest 2, the both ends of hobboing cutter 3 are convexly equipped with the first protrusion 32 With the second protrusion 33, knife rest 2 offers the through-hole 21 passed through for the first protrusion 32 on one end of pinion stand 1, and knife rest 2 is another It is offered on end and accommodates groove 22 therein for the second protrusion 33, the both ends of hobboing cutter 3 pass through the first protrusion 32 and through-hole 21 respectively Cooperation, the second protrusion 33 and groove 22 cooperation and be rotationally connected on knife rest 2, limitation the is additionally provided on knife rest 2 The locating part 4 of two protrusions 33 disengaging groove 22.In the present embodiment, which is the stop collar with opening 1a, stop collar It is sheathed on knife rest 2, and the first end of the stop collar can cover or part overlaid groove 22.Meanwhile it driving for convenience Knife rest 2 is rotated relative to pinion stand 1, and knife rest 2 is provided with the attachment base 23 of connection driving mechanism 100 far from one end of pinion stand 1, The slot 231 plugged for 100 output shaft of driving mechanism is offered on attachment base 23, is provided on the internal perisporium of the slot 231 more A circumferentially spaced arrangement simultaneously can limit the retaining convex rib 232 that knife rest 2 is rotated relative to 100 output shaft of driving mechanism, retaining convex rib 232 extend radially inwardly to be formed along slot 231.

In the present embodiment, 300 be in contact for the ease of hobboing cutter 3 with to be cut sharpen a pencil, axially offered on knife rest 2 for The cutting slot 2a that sharpening pencil 300 plugs, offers the opening 1a for pencil insertion cutting slot 2a on pinion stand 1, opening 1a with Cutting slot 2a is connected, and hobboing cutter 3 is obliquely installed adjacent to one end of pinion stand 1 to one end far from pinion stand 1 from knife rest 2, is rolling In the state that knife 3 is assemblied on knife rest 2, that one end of hobboing cutter 3 far from pinion stand 1 can be partially accommodated in cutting slot 2a.

A kind of penknife with cutting mechanism, the penknife include driving mechanism 100 and driving member 200, driving machine The power output end of structure 100 is connected with one end of driving member 200, and the other end of driving member 200 is connected with knife rest 2, and can drive 2 opposed gear seat 1 of knife rest rotation, it is notable that driving mechanism 100 can be using manually rocker arm, can also use Electronic driver rotates as long as being able to achieve driving knife rest 2 relative to pinion stand 1, due to above-mentioned manual or electronic drive Motivation structure 100 is relatively conventional, and this will not be repeated here, only illustrates in Fig. 1 in electronic driving mechanism 100 and cutting mechanism Cooperation schematic diagram, it is manually similar with the structure.

In use, the 300 cutting slot 2a plugged to be cut that sharpen a pencil, driving mechanism 100 provides power, above-mentioned 2 energy of knife rest Opposed gear seat 1 rotates forward, since hobboing cutter 3 is assemblied on knife rest 2, and the internal perisporium of the blade 31 of hobboing cutter 3 and pinion stand 1 On hock 11 directly engage, therefore knife rest 2 rotate while, hobboing cutter 3 can be driven to rotate backward relative to knife rest 2, by It is obliquely installed from knife rest 2 adjacent to one end of pinion stand 1 to one end far from pinion stand 1 in hobboing cutter 3, is assemblied in knife rest 2 in hobboing cutter 3 In the state of upper, that one end of hobboing cutter 3 far from pinion stand 1 can be partially accommodated in cutting slot 2a, therefore the rotation of hobboing cutter 3 can Directly make blade 31 and the 300 cutting face contacts to be cut that sharpen a pencil, completes the cutting of pencil.

Claims

1. a kind of cutting mechanism of penknife, including pinion stand (1), knife rest (2) and the hobboing cutter (3) for being used for sharpening pencil (300), The knife rest (2) is arranged on pinion stand (1) and energy opposed gear seat (1) rotates, and the hobboing cutter (3) is arranged on knife rest (2), It is provided with multiple blades (31) on the periphery wall of the hobboing cutter (3), each blade (31) coiled coil and along rolling from top to bottom The circumferentially-spaced arrangement of knife (3), it is characterised in that: be arranged at intervals with multiple and blade on the internal perisporium of the pinion stand (1) (31) hock (11) to match, the hobboing cutter (3) are rotated by the engagement of blade (31) and hock (11) with pinion stand (1) Cooperation.

2. cutting mechanism according to claim 1, it is characterised in that: each blade (31) is with respect to hobboing cutter (3) central axes Spiral angle (β) range be 35 °~40 °, installation angle of the hobboing cutter (3) relative to the rotary shaft (2b) of knife rest (2) The range of (α) is 10 °~15 °, and the hock (11) is 20 ° relative to the range (β-α) of the tilt angle of pinion stand (1) axis ~30 °.

Alternatively, each blade (31) is 28 °~34 ° with respect to the range of the spiral angle (β) of hobboing cutter (3) central axes, the rolling Knife (3) is 10 °~15 ° relative to the range of the installation angle (α) of the rotary shaft (2b) of knife rest (2), and the hock (11) is opposite In pinion stand (1) axis tilt angle range (β-α) be 13 °~24 °.

3. cutting mechanism according to claim 2, it is characterised in that: the hock (11) is relative to pinion stand (1) axis Tilt angle be 25 ° or 18 °.

4. according to claim 1 to cutting mechanism described in any claim in 3, it is characterised in that: the two of the hobboing cutter (3) End is convexly equipped with the first protrusion (32) and the second protrusion (33), and the knife rest (2) is offered on the one end of pinion stand (1) for the The through-hole (21) that one protrusion (32) passes through, offer on knife rest (2) other end accommodated for the second protrusion (33) it is therein recessed Slot (22), the both ends of the hobboing cutter (3) pass through respectively the cooperation of the first protrusion (32) and through-hole (21), the second protrusion (33) with it is recessed The cooperation of slot (22) and be rotationally connected on the knife rest (2).

5. cutting mechanism according to claim 4, it is characterised in that: it is convex to be additionally provided with limitation second on the knife rest (2) Portion (33) is detached from the locating part (4) of groove (22).

6. cutting mechanism according to claim 5, it is characterised in that: the locating part (4) is the limit with opening (1a) Position ring, the stop collar is sheathed on knife rest (2), and the first end of the stop collar can cover or part overlaid described in groove (22)。

7. cutting mechanism according to claim 1, it is characterised in that: axially offered on the knife rest (2) for be cut The cutting slot (2a) that pencil (300) plugs offers the opening for pencil insertion cutting slot (2a) on the pinion stand (1) (1a), the opening (1a) are connected with cutting slot (2a)；The hobboing cutter (3) from the one end of knife rest (2) neighbouring pinion stand (1) to One end far from pinion stand (1) is obliquely installed, and in the state that hobboing cutter (3) is assemblied on knife rest (2), the hobboing cutter (3) is separate That one end of pinion stand (1) can be partially accommodated in the cutting slot (2a).

8. cutting mechanism according to claim 1, it is characterised in that: the knife rest (2) sets far from the one end of pinion stand (1) It is equipped with the attachment base (23) of connection driving mechanism (100), is offered on the attachment base (23) for driving mechanism (100) output shaft The slot (231) plugged.

9. cutting mechanism according to claim 8, it is characterised in that: be provided on the internal perisporium of the slot (231) more A circumferentially spaced arrangement simultaneously can limit the retaining convex rib (232) that knife rest (2) is rotated relative to driving mechanism (100) output shaft, institute Retaining convex rib (232) is stated to extend radially inwardly to be formed along slot (231).

10. a kind of penknife with cutting mechanism described in any one of claims 1 to 9 claim, it is characterised in that: It include driving mechanism (100) and driving member (200), power output end and driving member (200) of the driving mechanism (100) One end is connected, and the other end of driving member (200) is connected with knife rest (2), and knife rest (2) opposed gear seat (1) can be driven to rotate.