CN104641960A

CN104641960A - Pruning machine

Info

Publication number: CN104641960A
Application number: CN201310598247.3A
Authority: CN
Inventors: 魏淦; 付祥青
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2013-11-22
Filing date: 2013-11-22
Publication date: 2015-05-27

Abstract

The invention provides a pruning machine. The pruning machine comprises a housing, a front handle, a main handle, a battery pack, a driving system, a cutting module and a switch module, wherein the front handle and the main handle are mounted on the housing; the batter pack is connected to the housing; the driving system comprises a motor; the switch module comprises a first switch arranged on the main handle, and a second switch arranged on the front handle; the cutting module comprises a pair of shearing blades capable of moving relative to each other. The pruning machine is characterized by comprising a rotary member with at least a part accommodated inside the housing; the rotary member is provided with a rotating axis parallel to the longitudinal axis of the housing; the cutting module is connected with the rotary member and can rotate around to the rotating axis relative to the housing so that the shear plane of the shearing blades can change relative to the front handle. The pruning machine can rapidly change the use state by rotating the cutting module without affecting the integral balance, thereby greatly improving the operating comfort level.

Description

Pruner

Technical field

The present invention relates to a kind of gardens type electric tool, particularly a kind of pruner.

Background technology

Pruner, as a kind of conventional gardens type electric tool, may be used for pruning or repairing shrub, hedge, and along with people strengthen with requirement day by day to the consciousness that vegetation ecological and city trees and shrubs beautify, its application is also more and more extensive.Due to the working face of pruner various shape faced by usual meeting when pruning; traditional pruner complete machine cannot change due to using state; make operator prune different angles working faces as side cut or other different radian faces time; the posture adjusting human body or arm is frequently needed to carry out rotary machine to change using state; which not only adds working strength, be difficult to when real work meet and prune needs.Simultaneously; usually the balance of complete machine can be caused in this way poor; such as, when needing to prune side; pruner accumbency is needed to use; compared with normally using with pruner; when accumbency uses, machine gravity has greatly changed relative to the position of handle; center of gravity is positioned at a horizontal direction relative to handle; such user can feel that machine weight becomes heavy; very large uncomfortable property can be brought to arm; affect comfort when user operates, particularly on the pruner that some power brick capacity are larger, such problem is more outstanding.

Summary of the invention

The object of the present invention is to provide a kind of using state that can change machine fast by rotary cutting assembly not affect the battery powered pruner of assembled machine balance simultaneously.

In order to solve the problem, the invention provides a kind of pruner, comprise housing, be arranged on the front handlebar on housing and main handle, one is connected to the power brick on housing, be arranged on the drive system in described housing, by the cutting assembly of drive systems and the switch module for control-driven system unlatching, described drive system comprises motor, described switch module comprises the first switch be arranged on main handle, be arranged on the second switch on front handlebar, described cutting assembly comprises the shear-blade that can be movable relatively for a pair, it is characterized in that: described pruner also comprises the rotary part be at least partially housed in described housing, described rotary part has a rotation along the direction being parallel to housing longitudinal axis, described cutting assembly and described rotary part connect and can rotate relative to described housing around described rotation, change to make the relative front handlebar of the shear plane of described shear-blade.

Further, described motor has an axis on the direction of motor output shaft, the rotation axis parallel of described axis and described rotary part.

Further, described rotary part has a preset length, in the longitudinal direction 1/3 be partially received in described housing, and relative to main handle closer to cutting assembly.

Further, described rotary part comprises rotary box and is arranged on rotary box for connecting the fixture of described cutting assembly.

Further, described drive system comprises the first driving mechanism of being at least partially housed in described rotary box and to be contained in rotary box and to be driven the second driving mechanism rotated around described rotation relative to described first driving mechanism by described rotary box.

Further, described first driving mechanism comprises a driving tapered gear shaft, described second driving mechanism comprises a driven wheel of differential, and described first driving mechanism and described second driving mechanism are in transmission connection by described driving tapered gear shaft and described driven wheel of differential.

Further, described first driving mechanism also comprises the first order planetary gear set output of motor being delivered to driving tapered gear shaft, described second driving mechanism also comprise an output shaft be connected with driven wheel of differential, one to be connected for being reciprocating rotating driving element by the convert rotational motion of output shaft with the shear-blade of cutting assembly.

Further, described pruner also comprises spin locking assembly, described spin locking assembly comprises locking piece, unlock piece and bias piece, and described locking piece comprises a latched position preventing described rotary part from rotating relative to housing and a unlocked position allowing described rotary part to rotate relative to housing.

Further, described rotary box comprises several grooves on the outer circumference surface of cutting assembly one end, described locking piece has a projection that can be inserted in described groove, described locking piece selectively with one of them groove fit, described bias piece is spring.

Further, described pruner also comprises an interlock assembly driven by described locking piece, and when locking piece is positioned at latched position, described interlock assembly can allow described electric motor starting, when locking piece is positioned at unlocked position, described interlock assembly of working as can forbid described electric motor starting.

Further, described front handlebar has a front handlebar trigger controlling described second switch and open, described interlock assembly comprises a lock link be connected with locking piece, described lock link allows front handlebar trigger to open second switch when locking piece is positioned at latched position, and forbids that when locking piece is positioned at unlocked position front handlebar trigger opens second switch.

Further, the weight of described power brick be described other parts of pruner weight and 0.2 times to 1.2 times.

Further, described power brick is positioned at below main handle, and described rotary part and described power brick are located along the same line.

Pruner of the present invention meets truncation by cutting assembly in the rotation of different angles, side is cut and the operating mode of other different cambered surfaces, meet the demand of pruning different operating plane, changed the shear plane of cutting assembly by rotary part simultaneously, affect the position of centre of gravity of machine hardly, even if use the power brick of larger capacity, assembled machine balance is still better, substantially increases operation comfort.

Accompanying drawing explanation

Fig. 1 is the integrally-built stereogram of the pruner in first embodiment of the invention;

Fig. 2 is the cutaway view of the pruner in first embodiment of the invention;

Fig. 3 is the cutaway view of the cutting assembly of pruner in Fig. 2;

Fig. 4 a is the partial schematic diagram of the pruner in first embodiment of the invention;

Fig. 4 b is the partial sectional view of the pruner in Fig. 4 a;

Fig. 5 is the cutaway view along A-A direction in the pruner in Fig. 4 a;

Fig. 6 a is the cutaway view of the pruner in Fig. 2 when being positioned at latched position along locking piece in the spin locking assembly in B-B direction;

Fig. 6 b is cutaway view when locking piece is positioned at unlocked position in the spin locking assembly of pruner in Fig. 6 a;

Fig. 7 a, 7b are the cutaway view of the interlock assembly in the pruner in first embodiment of the invention when not being activated and when starting respectively;

Fig. 8 a, 8b are the cutaway view of the interlock assembly in second embodiment of the invention in pruner when not being activated and when starting respectively.

Embodiment

The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.

Refer to Fig. 1 to Fig. 5, the switch module 14 that the pruner 10 in the first embodiment of the present invention comprises housing 11, drive system 12, the cutting assembly 13 driven by drive system 12 and opens for control-driven system.Housing 11 is provided with main handle 15 and front handlebar 16, housing 11 has a longitudinal axes L 1 in their length direction, cutting assembly 13 and main handle 15 lay respectively at two ends in housing axis L1 direction along the longitudinal, drive system 12 is arranged in housing 11, drive system 12 comprises motor 121, motor cover 122, first driving mechanism 12A and the second driving mechanism 12B, first driving mechanism 12A is used for the rotary motion of motor 121 to be passed to the second driving mechanism 12B, first driving mechanism 12A comprises gear-box 123, a driving tapered gear shaft 125a be arranged in the first order planetary gear set 124 and a second level Bevel Gear Transmission assembly 125 be in transmission connection along motor output shaft 1211 direction in gear-box 123, planetary gear set 124 comprises the planetary gear 124a with motor output shaft gear 1212 external toothing, with the ring gear 124b of planetary gear 124a internal messing, planetary gear 124a is connected on a connector 124c, connector 124c is connected to driving tapered gear shaft 125a, driving tapered gear shaft 125a is positioned on the gear-box 123 of drive system 12 by location bearing (figure does not mark), second driving mechanism is used for the output of driving tapered gear shaft 125a in the first driving mechanism 12A to be passed to cutting assembly 13, it comprises a driven wheel of differential 125b, an output shaft 126 and a rotating driving element 127.

Cutting assembly 13 comprises two shear-blade 13a, 13b, and it forwards stretches out from housing 11, and has blade, realizes cutting operation by doing relatively reciprocating motion each other.Described switch module 14 comprises the first switch 141 be arranged on main handle, the second switch 142 be arranged on front handlebar, it operates respectively by main handle trigger 151, front handlebar trigger 161, and only have when the first switch 141, second switch 142 start simultaneously, machine could be opened.For those of ordinary skills, in the concrete structure of cutting assembly 13 and switch module 14 pairs of drive systems 12, the control of motor 121 belongs to common practise, is not described in detail here.In the present embodiment, pruner 10 is powered by a power brick 17, is understandable that, also can configure AC power according to different needs, and be now arranged to can direct incoming transport power supply for the input of power supply.

Please again consult Fig. 4 a, Fig. 4 b and Fig. 5, pruner 10 also comprises an accommodating part to the rotary part 18 in housing 11, rotary part 18 has a preset length along the direction of housing 11 longitudinal axes L 1, and being partially received in housing 11 of guarantee 1/3, and relative to main handle 15 closer to cutting assembly 13.Rotary part 18 has a rotation L2 along the direction being parallel to housing longitudinal axes L 1, and can by above-mentioned multiple rotary support face relative to the rotatable support of housing 11.Rotary part 18 comprise a part extend to rotary box 181 outside housing 11 and one be arranged in rotary box 181 for being fixedly connected with the fixture 182 of cutting assembly 13, the part that wherein rotary box 181 is positioned at housing 11 longitudinally has front portion, pars intermedia and rear portion (figure does not mark), gear-box 123 in first driving mechanism 12A is formed with a step surface 1231 near one end of cutting assembly 13, gear-box 123 is by the rotatable rear portion being installed to rotary box 181 of step surface 1231, second driving mechanism 12B is all contained in the pars intermedia that rotary box 181 is positioned at housing 11, rotary box 181 can drive the second driving mechanism 12B to rotate around rotation L2 relative to the first driving mechanism 12A.The front portion of rotary box 181 be formed one columnar structured, columnar structured peripheral surface is also formed multiple annular protrusion 1811, and the part that rear portion and the gear-box 123 of rotary box 181 connect forms multiple rotary support face together with annular protrusion 1811,

Driven wheel of differential 125b in second driving mechanism 12B is fixed on output shaft 126, and output shaft 126 is positioned on rotary box 181 by location bearing (figure does not mark).Rotating driving element 127 is installed in output shaft 126 lower end, in the present embodiment, rotating driving element 127 is an eccentric block, shear-blade 13a in cutting assembly 13, one end of 13b is individually fixed in the different parts of eccentric block, the shear-blade 13a of cutting assembly 13, 13b is undertaken spacing by guide plate 21, make two shear-blade 13a, 13b keeps rectilinear motion, cutting assembly 13 and guide plate 19 are fixed on fixture 182, and be fixedly attached on rotary box 181 by fixture 182, the part (figure does not mark) that rotary box 181 extends housing is formed as providing the auxiliary structure gripped.

Below the operation principle of pruner 10 of the present invention is described in detail, power brick 17 supplies power to motor 121, motor 121 drive motor output shaft 1211 rotates, planetary gear 124a is delivered to by motor output shaft gear 1212, planetary gear 124a drives driving tapered gear shaft 125a to rotate by connector 124c, then driving tapered gear shaft 125a drives driven wheel of differential 125b to rotate, because driven wheel of differential 125b is fixed on output shaft 126, final rotary motion carries out eccentric operating by output shaft 126 driven rotary actuated element 127, thus realize two shear-blade 13a of cutting assembly 13, 13b moves back and forth, realize cutting function.

In present embodiment, rotary part 18 and drive system 12 can be used for same passing straight through, and the axis L3 of motor output shaft 1211 is parallel with the rotation L2 of described rotary part 18.Slow down through first order planetary gear set 124 after the rotary motion output of motor 121, then slowed down by second level Bevel Gear Transmission assembly 125, wherein the reason of bevel gear is selected in second level deceleration: one is change transmission direction; Two is make rotary part 18 to rotate around rotation L2 and then to drive cutting assembly 13 to rotate, and ensures that this rotation does not affect whole transmission agency simultaneously.In other embodiments, also motor 121 can be arranged along vertical direction, now the axis L3 of motor output shaft 1211 is vertical with housing longitudinal axes L 1, now need in drive system 12, increase one-level Bevel Gear Transmission (not shown) and change transmission direction, finally still exported by driven wheel of differential 125b in rotary box 181, by said structure, described rotary part 18 forms one with described cutting assembly 13 and rotates assembly, and described rotation assembly can rotate relative to above-mentioned housing 11.

Refer to Fig. 6 a and Fig. 6 b, pruner 10 also comprises a spin locking assembly 20, for selectively locking the anglec of rotation of rotary part 18.This spin locking assembly 20 is positioned at housing 11 one end near cutting assembly 13, comprise locking piece 201, unlock piece 202 and bias piece 203, locking piece 201 is formed as the loop configuration of a lower ending opening, it can be installed to the columnar structured outer circumference surface of rotary box 181, a stop pin 201a is fixedly connected on the inwall of locking piece 201 loop configuration, also one can be made with locking piece 201, unlock piece 202 is a push button, its extended surface to housing 11 is for operator's operation, in present embodiment, unlock piece 202 extends to below housing, unlock piece 202 is connected to the aperture position of the annular mechanism of locking piece 201, locking piece 201 is arranged on housing 11 by bias piece 203.In the present invention, bias piece is a spring.Rotary box 181 is columnar structured comprises several grooves 1812 on the outer circumference surface of cutting assembly 13 one end, stop pin 201a optionally matches with one of them groove 1812, when stop pin 201a is positioned at one of them groove 1812, rotary part 18 is locked relative to the anglec of rotation of housing 11.Bias piece 203 applies a downward biasing force to stop pin 201a all the time, stop pin 201a is arrived and groove 1812 accordingly position time, can be pressed in this groove 1812.When the biasing force that upwardly unlock piece 202 impels stop pin 201a to overcome bias piece 203 moves upward, when departing from the coordinating of groove 1812, the anglec of rotation of the adjustable rotary part 18 of user and then the anglec of rotation of adjustment cutting assembly 13.In other embodiments, bias piece also can be contained on unlock piece, applies biasing force directly to unlock piece, thus indirectly drives stop pin to move.Certain conversion relation is there is between the setting of groove 1812 and the anglec of rotation of rotary part 18, in the present embodiment, on the position becoming 0 °, 45 °, 90 ° ,-45 ° and-90 ° that layout in the circumference on rotary box 181 of groove 1812 makes rotary part 18 can be locked in housing longitudinal axes L 1, the part of extending housing at rotary box 181 is provided with arrow logo, corresponding, the outer circumference surface of housing 11 front end is provided with different angle marks, and being convenient to user's rotary manipulation is viewing angle excursion.In other embodiments, also can adopt the locking device of other types and structure that the rotational angle of cutting assembly 13 can be set in angle required arbitrarily.

When needing the angle regulating cutting assembly 13, user can grip with a hand part that rotary box 181 extends housing 11, and upwards press unlock piece 202 with thumb, the biasing force making stop pin 201a overcome bias piece 203 moves up to and departs from groove 1812, another holds main handle 15, and kept motionless, then rotary part 18 is rotated, driven wheel of differential 125b mounted thereto is rotated around rotation L2, due to engaging between driven wheel of differential 125b with driving tapered gear shaft 125a, in rotary course, the shear-blade 13a of cutting assembly 13, relative motion can be there is between 13b.Certainly, user also can adopt another mode of operation, namely grip with a hand part that rotary box 181 extends housing 11, and make it keep motionless, main handle 15 is rotated with another hand after unlocking, when turning to required angle, user unclamps unlock piece 202, stop pin 201a is at the moved downward of bias piece 203, match with the groove 1812 on rotary box 181, thus rotary part 18 is locked in required angle, preferably, drive cutting assembly 13 to rotate relative to housing 11 by rotary part 18, more convenient like this operation, because when adopting power brick 17 to power, in order to ensure flying power, the capacity of power brick 17 needs enough large, the capacity of power brick 17 is directly proportional to the weight of itself under normal circumstances, therefore the weight of power brick 17 is larger, and the weight of power brick 17 is the principal elements affecting complete machine weight, part drive system 12 and cutting assembly 13 is driven to rotate by the rotary part 18 that rotating weight is lighter, miscellaneous part does not need to rotate, the balance of such complete machine have also been obtained guarantee, under normal circumstances, select the weight of power brick 17 be other parts of pruner weight and 0.2 to 1.2 times, this is because when the weight of power brick 17 be less than other moiety by weight and 0.2 times time, the capacity of power brick is less, working time is shorter, user demand cannot be met, and when the weight of power brick 17 be greater than other moiety by weight and 1.2 times time, the preponderance of power brick 17, be arranged on sense of fatigue when housing 11 can increase the weight of operator's long-time operation, further preferably, the weight of power brick 17 be other parts weight and 0.4 to 0.9 times, so not only ensure that power brick 17 has enough capacity, improve the balance of complete machine, also the working time is extended, meet the user demand of operator.In order to better realize assembled machine balance, in present embodiment, power brick 17 being connected on housing 11 and being positioned at the below of main handle 15, rotary part 18 and power brick 17 are located along the same line.

Adopt cutting assembly 13 described in the invention, can rotate around rotation L2 relative to drive system 12 under the drive of rotary part 18, by rotary cutting assembly 13, can according to the using state needing rapid adjustment pruner 10 of real work.In the rotary course of cutting assembly 13, machine gravity is all the time near a plane, this plane definition is longitudinal axes L 1 by housing and vertical with the ground of a level, therefore the balance of complete machine is guaranteed, the shear-blade 13a of cutting assembly 13 simultaneously, 13b defines a shear plane, shear-blade 13a, when 13b rotates, the relative front handlebar 16 of above-mentioned shear plane changes, main handle 15 is constant with the relative position of front handlebar 16 simultaneously, therefore do not need during rotary manipulation to change operation posture, grip basic leicht fallen D/A, front handlebar 16 can be reduced to a T-type structure, provide cost savings.

Refer to Fig. 7 a and Fig. 7 b, the interlock assembly 21 of motor 121 error starting in the restriction drive system 12 controlled by spin locking assembly 20 is also provided with in pruner 10 in the first embodiment of the present invention, interlock assembly 21 comprises a lock link 211, lock link 211 be connected with locking piece 201 and with front handlebar trigger 161 direct effect, upwards being unlocked by pressing part 202, locking piece 201 moves towards unlocked position, then lock link 211 moves towards the direction of front handlebar trigger 161, forbid front handlebar trigger 161 downward operation, now, motor 121 cannot start, utensil cannot operate, accordingly, if locking piece 211 moves towards latched position, then lock link 211 moves towards the direction away from front handlebar trigger 161, front handlebar trigger 161 downward operation is allowed to open second switch 142, now motor allows to start, utensil can normally work.In addition, when front handlebar trigger 161 operates, the position of lock link 211 is defined, now cannot upwards being unlocked by pressing part 202.

Refer to Fig. 8 a and Fig. 8 b, the pruner 10 ' of corresponding the second embodiment of the present invention, main handle adopts loop configuration in this embodiment, interlock assembly 21 ' and main handle trigger 151 ' act on, interlock assembly 21 ' comprises the lock link 211 ' be connected with locking piece 201, with the slide block 212 ' of lock link 211 ' interlock, slide block 212 ' is configured to seesaw accordingly along with the above-below direction of locking piece 201 moves, particularly, when locking piece 201 moves towards unlocked position, then slide block 212 ' moves towards the direction of main handle trigger 151 ' under the drive of lock link 211 ', now the rear end of slide block 212 ' props up the high spot (figure does not mark) of the front end of main handle trigger 5a ', main handle trigger 151 ' cannot operate, also the first switch 141 cannot just be opened, accordingly, if locking piece 201 moves towards latched position, then slide block 212 ' moves towards the direction away from main handle trigger, main handle trigger 151 ' can operate, first switch 141 can be opened.Slide block 212 ' can be connected on lock link 211 ', also can be directly be set to the position near lock link 211 ' on housing, and by a bias piece (not shown) towards the direction bias voltage away from main handle trigger 151 ', the position of slide block 212 ' is arranged so that when operating main handle trigger 151 ', the projection of the front end of main handle trigger 151 ' can prop up the rear end of slide block, because slide block 212 ' position is defined, cannot seesaw, locking piece 201 also cannot move up and down.

By above-mentioned interlock assembly 21, when unlock piece 202 is in the unlocked position, interlock assembly 21 can forbid that the first switch 141 in machine switch module 14 or second switch 142 are unlocked, can prevent when regulating the anglec of rotation of cutting assembly 13 thus, motor 121 error starting, and when console switch assembly 14 is started shooting, interlock assembly 21 can forbid that unlock piece 202 moves to unlocked position, ensure handling safety thus.

Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.

Claims

1. a pruner, comprise housing, be arranged on the front handlebar on housing and main handle, one is connected to the power brick on housing, be arranged on the drive system in described housing, by the cutting assembly of drive systems and the switch module for control-driven system unlatching, described drive system comprises motor, described switch module comprises the first switch be arranged on main handle, be arranged on the second switch on front handlebar, described cutting assembly comprises the shear-blade that can be movable relatively for a pair, it is characterized in that: described pruner also comprises the rotary part be at least partially housed in described housing, described rotary part has a rotation along the direction being parallel to housing longitudinal axis, described cutting assembly and described rotary part connect and can rotate relative to described housing around described rotation, change to make the relative front handlebar of the shear plane of described shear-blade.

2. pruner according to claim 1, is characterized in that: described motor has an axis on the direction of motor output shaft, the rotation axis parallel of described axis and described rotary part.

3. pruner according to claim 1, is characterized in that: described rotary part has a preset length, in the longitudinal direction 1/3 be partially received in described housing, and relative to main handle closer to cutting assembly.

4. pruner according to claim 1, is characterized in that: described rotary part comprises rotary box and is arranged on rotary box for connecting the fixture of described cutting assembly.

5. pruner according to claim 4, is characterized in that: described drive system comprises the first driving mechanism of being at least partially housed in described rotary box and to be contained in rotary box and to be driven the second driving mechanism rotated around described rotation relative to described first driving mechanism by described rotary box.

6. pruner according to claim 5, it is characterized in that: described first driving mechanism comprises a driving tapered gear shaft, described second driving mechanism comprises a driven wheel of differential, and described first driving mechanism and described second driving mechanism are in transmission connection by described driving tapered gear shaft and described driven wheel of differential.

7. pruner according to claim 6, it is characterized in that: described first driving mechanism also comprises the first order planetary gear set output of motor being delivered to driving tapered gear shaft, described second driving mechanism also comprise an output shaft be connected with driven wheel of differential, one to be connected for being reciprocating rotating driving element by the convert rotational motion of output shaft with the shear-blade of cutting assembly.

8. pruner according to claim 1, it is characterized in that: described pruner also comprises spin locking assembly, described spin locking assembly comprises locking piece, unlock piece and bias piece, and described locking piece comprises a latched position preventing described rotary part from rotating relative to housing and a unlocked position allowing described rotary part to rotate relative to housing.

9. pruner according to claim 8, it is characterized in that: described rotary box comprises several grooves on the outer circumference surface of cutting assembly one end, described locking piece has a projection that can be inserted in described groove, described locking piece selectively with one of them groove fit, described bias piece is spring.

10. pruner according to claim 8, it is characterized in that: described pruner also comprises an interlock assembly driven by described locking piece, when locking piece is positioned at latched position, described interlock assembly can allow described electric motor starting, when locking piece is positioned at unlocked position, described interlock assembly of working as can forbid described electric motor starting.

11. pruners according to claim 10, it is characterized in that: described front handlebar has a front handlebar trigger controlling described second switch and open, described interlock assembly comprises a lock link be connected with locking piece, described lock link allows front handlebar trigger to open second switch when locking piece is positioned at latched position, and forbids that when locking piece is positioned at unlocked position front handlebar trigger opens second switch.

12. pruners according to claim 1, is characterized in that: the weight of described power brick be described other parts of pruner weight and 0.2 times to 1.2 times.

13. pruners according to claim 1, is characterized in that: described power brick is positioned at below main handle, and described rotary part and described power brick are located along the same line.