CN115152448A - Pruning shear - Google Patents
Pruning shear Download PDFInfo
- Publication number
- CN115152448A CN115152448A CN202210845667.6A CN202210845667A CN115152448A CN 115152448 A CN115152448 A CN 115152448A CN 202210845667 A CN202210845667 A CN 202210845667A CN 115152448 A CN115152448 A CN 115152448A
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- Prior art keywords
- blade
- cutter
- movable blade
- movable
- main body
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000013138 pruning Methods 0.000 title claims abstract description 32
- 238000010008 shearing Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 description 10
- 238000000926 separation method Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/02—Secateurs; Flower or fruit shears
- A01G3/033—Secateurs; Flower or fruit shears having motor-driven blades
- A01G3/037—Secateurs; Flower or fruit shears having motor-driven blades the driving means being an electric motor
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Scissors And Nippers (AREA)
Abstract
The invention relates to pruning shears, which comprise a main body shell, a driving component and a cutter head component, wherein the driving component is arranged in the main body shell; the driving assembly comprises a swinging tooth connected with the movable blade, the cutter head assembly comprises a connecting piece arranged between the swinging tooth and the movable blade, the connecting piece comprises a first part contained in the movable blade, and the contact surface of the first part and the movable blade is an inclined surface in the feed direction. According to the invention, the contact surface of the connecting piece and the movable blade is arranged to be an inclined surface in the feeding direction, so that the blade parts of the movable blade and the fixed blade can be effectively limited from being separated, and the shearing effect is good.
Description
[ technical field ] A
The invention relates to the field of garden tools, in particular to pruning shears.
[ background of the invention ]
The pruning shears are garden products, wherein a motor drives a cutter head assembly to operate through a speed reducing structure so as to shear branches and the like, the cutter head assembly of the pruning shears comprises a head shell fixed at the front end, a fixed cutter fixed on the head shell and a movable cutter connected to the speed reducing mechanism, and the movable cutter reciprocates under the driving of the speed reducing mechanism so as to perform reciprocating cutting action relative to the fixed cutter.
However, due to the existence of the reverse edge of the blade, the cutting edges of the movable blade and the fixed blade are forced to separate during actual shearing, and the conventional method is to use a lock nut for locking so as to provide axial pressure for preventing the axial separation of the cutting edges of the movable blade and the fixed blade, but the pressure always exists in the processes of feeding and retracting of the pruning shears, so that the accelerated abrasion of the supporting parts of the movable blade and the fixed blade is caused. The service life is reduced, the current of the whole machine is increased, and the efficiency is also reduced; in addition, when the supporting parts of the movable blade and the fixed blade are worn, the locking force provided by the locking nut is gradually reduced, the movable blade and the fixed blade are more easily separated, and the shearing quality (such as uneven shearing section, bark connection and the like) is seriously influenced.
In view of the above, there is a need for an improved pruning shears to overcome the drawbacks of the prior art.
[ summary of the invention ]
Aiming at the defects of the prior art, the invention aims to provide pruning shears with good shearing effect and long service life.
The invention solves the problems of the prior art by adopting the following technical scheme: a pruning shear comprises a main body shell, a driving assembly and a cutter head assembly, wherein the driving assembly is arranged in the main body shell, the cutter head assembly is connected to the front end of the main body shell, the cutter head assembly comprises a head shell fixed to the front end of the main body shell, a fixed blade fixed to the head shell and a movable blade connected to the driving assembly, and the driving assembly drives the movable blade to move so as to enable the movable blade to do reciprocating shearing action relative to the fixed blade; the cutter head assembly comprises a connecting piece arranged between the swing teeth and the movable cutter blade, the connecting piece comprises a first part contained in the movable cutter blade, and the contact surface of the first part and the movable cutter blade is an inclined surface in the feed direction.
The further improvement scheme is as follows: the connecting piece comprises a second part accommodated in the swing tooth, and the first part and the second part are of an integrated structure.
The further improvement scheme is as follows: in the tool retracting direction, the contact surface of the first part and the movable blade is a straight surface.
The further improvement scheme is as follows: the second part comprises a front end which is contacted with the swing tooth in the cutter feeding direction and a rear end which is contacted with the swing tooth in the cutter withdrawing direction, and the front end and the rear end are parallel to each other.
The further improvement scheme is as follows: the inclined surface extends from an end of the front end toward the straight surface.
The further improvement scheme is as follows: the rear end and the straight surface are located in the same plane.
The further improvement scheme is as follows: the driving assembly comprises a motor arranged in the main body casing, a speed reducing mechanism connected to the front end of the motor and a transmission gear driven by the speed reducing mechanism, and the transmission gear extends into the head casing and is meshed with the swing teeth.
The further improvement scheme is as follows: in the vertical direction perpendicular to the feeding direction, the swing teeth, the movable blade and the fixed blade are sequentially arranged from top to bottom.
The further improvement scheme is as follows: the cutter head assembly comprises a locking piece and a locking nut, the locking piece is installed on the head shell, and the locking piece penetrates through the swing teeth, the movable blade, the fixed blade and the head shell in sequence and is locked by the locking nut.
The invention can also adopt the following technical scheme for solving the problems in the prior art: a pruning shear comprises a main body shell, a driving assembly and a cutter head assembly, wherein the driving assembly is arranged in the main body shell, the cutter head assembly is connected to the front end of the main body shell, the cutter head assembly comprises a head shell fixed to the front end of the main body shell, a fixed blade fixed to the head shell and a movable blade connected to the driving assembly, and the driving assembly drives the movable blade to move so as to enable the movable blade to do reciprocating shearing action relative to the fixed blade; the driving assembly comprises a swinging tooth connected with the movable blade, the cutter head assembly comprises a connecting piece arranged between the swinging tooth and the movable blade, when the cutter is fed, the connecting piece generates driving force for the movable blade, the driving force comprises a first component moving along the feeding direction and a second component pressing towards the movable blade, and the first component and the second component are arranged in an intersecting manner.
Compared with the prior art, the invention has the following beneficial effects: in the feed direction, the contact surface of the connecting piece and the movable blade is arranged to be an inclined surface; in the tool retracting direction, the contact surface of the connecting piece and the movable blade is set to be a straight surface, when the tool is fed, the connecting piece drives the movable blade to generate a driving force, due to the existence of the inclined surface, the driving force can be decomposed into a first component force moving along the tool feeding direction and a second component force pressing downwards along the vertical direction, the second component force can effectively limit the separation of the cutting parts of the movable blade and the fixed blade, the shearing effect is good, and in the whole tool feeding process, the locking nut does not need to provide too large locking force in the vertical direction; when the cutter retracts, the connecting block only generates force along the cutter retracting direction, force along the vertical direction cannot be generated, the movable blade and the fixed blade are small in stress in the vertical direction, friction is reduced, and the service life of the cutter head assembly is greatly prolonged.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
FIG. 1 is a schematic view of a pruning shears according to the present invention;
FIG. 2 is a schematic exploded view of the pruning shears shown in FIG. 1;
FIG. 3 is a schematic view of the structure of the oscillating teeth, the connecting member and the movable blade of the pruning shears shown in FIG. 1;
FIG. 4 is a schematic view of the structure of the connecting member and the movable blade of the pruning shears shown in FIG. 1;
FIG. 5 is a schematic exploded view of the wobble tooth, the connecting member and the movable blade shown in FIG. 3;
FIG. 6 is a schematic view showing the driving force of the pruning shears shown in FIG. 1 during feeding;
figure 7 is an exploded view of a prior art trimmer bit assembly.
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, the present invention relates to a pair of pruning shears 100, wherein the pruning shears 100 includes a main housing 1 extending along a front-back direction, a driving assembly installed in the main housing 1, a blade assembly 2 connected to a front end of the main housing 1, a trigger 7 installed in the main housing 1, a hand guard 8 surrounding the trigger 7, a battery mounting portion 9 located at a rear end of the main housing 1, and a battery pack 200 inserted into the battery mounting portion 9, the battery pack 200 provides power for the driving assembly, and the driving assembly drives the blade assembly 2 to open or close for cutting branches and the like.
In the present embodiment, the above-described trigger 7 is provided adjacent to the cutter head assembly 2, and the body housing between the trigger 7 and the battery mounting portion 9 forms a grip portion for grasping with the palm of the user's hand; the hand guard part 8 is arranged to protect the fingers of the user and prevent the trigger 7 from being touched by mistake.
In this embodiment, the battery pack 200 is detachably mounted on the battery mounting portion 9, so as to quickly and conveniently replace the battery pack 200, or to charge the battery pack 200 after being taken off; in addition, the pruning shears 100 can be sold as a bare machine (i.e., without a battery pack), effectively reducing the purchase cost of the user.
Referring to fig. 2, the driving assembly includes a motor 4 installed in the main body housing 1, a speed reducing mechanism 5 connected to a front end of the motor 4, a transmission gear 6 driven by the speed reducing mechanism 5, a swing gear 3 connected to the transmission gear 6, and a control assembly 10 connected to the motor 4, wherein the swing gear 3 is connected to the cutter head assembly 2, and a trigger 7 is connected to the control assembly 10. The user presses the trigger 7 to trigger the control assembly 10 and drive the motor 4 in forward or reverse rotation to drive the cutter head assembly 2 in reciprocating shearing.
Referring to fig. 7, in the prior art, the cutter head assembly 2 includes a head housing 21 fixed at the front end of the main body housing 1, a fixed blade 22 fixed on the head housing 21, a movable blade 23 connected to the swing teeth 3, a connecting member 24' arranged between the swing teeth 3 and the movable blade 23, a locking member 25 and a lock nut 26 arranged on the head housing 21, wherein the direction in which the movable blade 23 is close to the fixed blade 22 to perform shearing is taken as a feeding direction, the direction in which the movable blade 23 is far from the fixed blade 22 to perform separation is taken as a retracting direction, and the swing teeth 3, the movable blade 23 and the fixed blade 22 are sequentially arranged from top to bottom in a vertical direction perpendicular to the feeding direction; and the locking piece 25 passes through the swinging tooth 3, the movable blade 23, the fixed blade 22 and the head shell 21 in sequence and then is locked by the locking nut 26.
Specifically, in the prior art, the head housing 21 includes a mounting base 211 connected to the main body housing 1, a connecting base 212 extending forward from a front end of the mounting base 211, and an engaging groove 213 penetrating the connecting base 212, the engaging groove 213 is opened at a front side of the mounting base 211, the transmission gear 6 passes through the mounting base 211 and extends into the engaging groove 213, a front end of the transmission gear 6 is a bevel gear 61, the transmission gear 6 is engaged with the swing teeth 3 via the bevel gear 61, and the swing teeth 3 further drive the movable blade 23 to move, so that the movable blade 23 makes a reciprocating shearing motion relative to the fixed blade 22.
Further, in the prior art, the connecting member 24' is a cylindrical pin, the swing tooth 3 and the cylindrical pin are connected into a whole in an interference manner, and then the swing tooth 3 drives the movable blade 23 to swing back and forth through the cylindrical pin, so as to implement a feeding action or a retracting action. However, the cylindrical pin can only provide a shearing force in the feeding direction, and the cutting edges of the movable blade 23 and the fixed blade 22 are separated by the force, so that the cutting edges of the movable blade 23 and the fixed blade 22 are not in the same plane when shearing, thereby affecting the shearing quality.
Referring to fig. 3 to 5, in the present embodiment, the connecting member 24 includes a first portion 241 received in the movable blade 23 and a second portion 242 received in the swing tooth 3, and correspondingly, the movable blade 23 includes a first groove 231 receiving the first portion 241, the swing tooth 3 includes a second groove 31 corresponding to the second portion 242, and the first portion 241 and the second portion 242 are integrally formed for easy manufacturing and assembling, unlike the cylindrical pin in the prior art.
As shown in fig. 6, in the feeding direction, the contact surface between the first portion 241 and the movable blade 23 is an inclined surface 243; in the retracting direction, the contact surface of the first portion 241 and the movable blade 23 is a straight surface 244. When the pruning shears 100 feed, the swing teeth 3 drive the connecting piece 24, the connecting piece 24 drives the moving blade 23 through the inclined surface 243 and generates a driving force F, due to the existence of the inclined surface 243, the driving force F can be decomposed into a first component force F1 moving along the feeding direction and a second component force F2 pressing downwards along the vertical direction, the first component force F1 acts on the moving blade 23 to enable the moving blade 23 to be close to the fixed blade 22 for shearing, and the second component force F2 acts on the moving blade 23 to enable the moving blade 23 and the fixed blade 22 to be attached more tightly in the shearing process, so that the separation of the cutting parts of the moving blade 23 and the fixed blade 22 is effectively limited, the shearing effect is good, and in the whole feeding process, the locking nut does not need to provide too large locking force in the vertical direction; when the cutter retracts, the connecting block 24 drives the movable blade 23 through the straight surface 244, only force in the cutter retracting direction can be generated in the cutter retracting process, force in the vertical direction cannot be generated, the force in the vertical direction of the movable blade 23 and the fixed blade 22 is small, friction is reduced, and the service life of the cutter head assembly 2 is greatly prolonged.
Referring to fig. 5, the second portion 242 includes a front end 245 contacting the oscillating tooth 3 in the feeding direction and a rear end 246 contacting the oscillating tooth 3 in the retracting direction, the front end 245 and the rear end 246 are parallel to each other, and the rear end 246 and the straight surface 244 are located in the same plane, so that the stress on the entire connecting member 24 is more uniform, and the service life of the connecting member 24 is prolonged.
In the present embodiment, the inclined surface 243 extends from the end of the tip 245 toward the straight surface 244.
Furthermore, the connecting piece 24 is in clearance fit with the swing tooth 3 and the movable blade 23.
Referring to fig. 4, the movable blade 23 includes a through hole 232 for the locking member 25 to pass through and a cutting portion 233 disposed along the feeding direction, and the first slot 231 is located between the through hole 232 and the cutting portion 233.
In the pruning shears 100 of the present invention, the contact surface between the connecting piece 24 and the movable blade 23 is set to be the inclined surface 243 in the feeding direction; in the tool retracting direction, the contact surface of the connecting piece 24 and the movable blade 23 is set to be a straight surface 244, when the tool is fed, the connecting piece 24 drives the movable blade 23 to generate a driving force F, due to the existence of the inclined surface 243, the driving force F can be decomposed into a first component force F1 moving along the tool feeding direction and a second component force F2 pressing downwards along the vertical direction, the second component force F2 can effectively limit the separation of the blade parts of the movable blade 23 and the fixed blade 22, the shearing effect is good, and in the whole tool feeding process, the locking nut does not need to provide too large locking force in the vertical direction; when the cutter is withdrawn, the connecting block 24 only generates force along the cutter withdrawing direction, but does not generate force along the vertical direction, the stress of the movable blade 23 and the fixed blade 22 in the vertical direction is small, the friction is reduced, and the service life of the cutter head component 2 is greatly prolonged.
The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that numerous other alternative arrangements can be devised in the pruning shears of the present invention without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.
Claims (10)
1. A pruning shear comprises a main body shell, a driving assembly and a cutter head assembly, wherein the driving assembly is arranged in the main body shell, the cutter head assembly is connected to the front end of the main body shell, the cutter head assembly comprises a head shell fixed to the front end of the main body shell, a fixed blade fixed to the head shell and a movable blade connected to the driving assembly, and the driving assembly drives the movable blade to move so as to enable the movable blade to do reciprocating shearing action relative to the fixed blade; the method is characterized in that: the cutter head assembly comprises a connecting piece arranged between the swing teeth and the movable cutter blade, the connecting piece comprises a first part contained in the movable cutter blade, and the contact surface of the first part and the movable cutter blade is an inclined surface in the feed direction.
2. The pruning shears according to claim 1, wherein: the connecting piece comprises a second part accommodated in the swing tooth, and the first part and the second part are of an integrated structure.
3. The pruning shears according to claim 2, wherein: in the tool retracting direction, the contact surface of the first part and the movable blade is a straight surface.
4. The pruning shears according to claim 3, wherein: the second part comprises a front end which is contacted with the swing tooth in the cutter feeding direction and a rear end which is contacted with the swing tooth in the cutter withdrawing direction, and the front end and the rear end are parallel to each other.
5. The pruning shears according to claim 4, wherein: the inclined surface extends from an end of the front end toward the straight surface.
6. The pruning shears according to claim 5, wherein: the rear end and the straight surface are located in the same plane.
7. The pruning shears according to claim 1, wherein: the driving assembly comprises a motor arranged in the main body casing, a speed reducing mechanism connected to the front end of the motor and a transmission gear driven by the speed reducing mechanism, and the transmission gear extends into the head casing and is meshed with the swing teeth.
8. The pruning shears according to claim 7, wherein: in the vertical direction perpendicular to the feeding direction, the swing teeth, the movable blade and the fixed blade are sequentially arranged from top to bottom.
9. The pruning shears according to claim 8, wherein: the cutter head assembly comprises a locking piece and a locking nut, the locking piece is installed on the head shell, and the locking piece penetrates through the swing teeth, the movable blade, the fixed blade and the head shell in sequence and is locked by the locking nut.
10. A pruning shear comprises a main body shell, a driving assembly and a cutter head assembly, wherein the driving assembly is arranged in the main body shell, the cutter head assembly is connected to the front end of the main body shell and comprises a head shell fixed to the front end of the main body shell, a fixed cutter fixed to the head shell and a movable cutter connected to the driving assembly, and the driving assembly drives the movable cutter to move so that the movable cutter performs reciprocating shearing action relative to the fixed cutter; the method is characterized in that: the driving assembly comprises a swinging tooth connected to the movable blade, the cutter head assembly comprises a connecting piece arranged between the swinging tooth and the movable blade, the connecting piece generates driving force for the movable blade during feeding, the driving force comprises a first component moving along the feeding direction and a second component pressing towards the movable blade, and the first component and the second component are arranged in an intersecting manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845667.6A CN115152448A (en) | 2022-07-19 | 2022-07-19 | Pruning shear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845667.6A CN115152448A (en) | 2022-07-19 | 2022-07-19 | Pruning shear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115152448A true CN115152448A (en) | 2022-10-11 |
Family
ID=83494183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210845667.6A Pending CN115152448A (en) | 2022-07-19 | 2022-07-19 | Pruning shear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115152448A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000117528A (en) * | 1998-10-15 | 2000-04-25 | Amada Eng Center Co Ltd | Shearing machine |
| TW541216B (en) * | 1998-02-20 | 2003-07-11 | Delta Int Machinery Corp | Self-adjusting clamping device |
| CN201105390Y (en) * | 2007-09-10 | 2008-08-27 | 杭州尖山工具有限公司 | Blade peripheral flat-grinding jig |
| CN102672399A (en) * | 2012-06-01 | 2012-09-19 | 浙江约特工具有限公司 | Inclined wedge block hold-down device for sawtooth material |
| CN103501941A (en) * | 2011-05-12 | 2014-01-08 | 株式会社钨钛合金 | Clamp device for cutting insert, cutting tool, and cutting insert |
| CN103866498A (en) * | 2014-03-27 | 2014-06-18 | 卢成林 | Shearing mechanism of lace machine |
| CN106532402A (en) * | 2016-12-07 | 2017-03-22 | 常熟利星光电科技有限公司 | Crimping apparatus and crimping method for flag-shaped terminal |
| CN209986329U (en) * | 2019-04-12 | 2020-01-24 | 李俊 | Blade fixing device for five-segmentation of deformed steel bar |
| CN211607479U (en) * | 2020-01-17 | 2020-10-02 | 上海西玛工具有限公司 | Electric pruning shears |
-
2022
- 2022-07-19 CN CN202210845667.6A patent/CN115152448A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW541216B (en) * | 1998-02-20 | 2003-07-11 | Delta Int Machinery Corp | Self-adjusting clamping device |
| JP2000117528A (en) * | 1998-10-15 | 2000-04-25 | Amada Eng Center Co Ltd | Shearing machine |
| CN201105390Y (en) * | 2007-09-10 | 2008-08-27 | 杭州尖山工具有限公司 | Blade peripheral flat-grinding jig |
| CN103501941A (en) * | 2011-05-12 | 2014-01-08 | 株式会社钨钛合金 | Clamp device for cutting insert, cutting tool, and cutting insert |
| CN102672399A (en) * | 2012-06-01 | 2012-09-19 | 浙江约特工具有限公司 | Inclined wedge block hold-down device for sawtooth material |
| CN103866498A (en) * | 2014-03-27 | 2014-06-18 | 卢成林 | Shearing mechanism of lace machine |
| CN106532402A (en) * | 2016-12-07 | 2017-03-22 | 常熟利星光电科技有限公司 | Crimping apparatus and crimping method for flag-shaped terminal |
| CN209986329U (en) * | 2019-04-12 | 2020-01-24 | 李俊 | Blade fixing device for five-segmentation of deformed steel bar |
| CN211607479U (en) * | 2020-01-17 | 2020-10-02 | 上海西玛工具有限公司 | Electric pruning shears |
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