CN106508447B

CN106508447B - Pruning machine

Info

Publication number: CN106508447B
Application number: CN201510583676.2A
Authority: CN
Inventors: 聂方杰
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2015-09-15
Filing date: 2015-09-15
Publication date: 2020-01-31
Anticipated expiration: 2035-09-15
Also published as: CN106508447A

Abstract

The invention discloses pruning machines, which comprise a motor, a transmission mechanism, a pruning blade, a motor shell and a tool shell assembly, wherein the motor comprises a stator assembly and a rotor assembly, the transmission mechanism is driven by the motor, the pruning blade is driven by the transmission mechanism to do shearing motion, the motor shell is used for accommodating the rotor assembly of the motor, the tool shell assembly enables the transmission mechanism and the motor shell to form whole bodies, the tool shell assembly comprises a th material part which is at least made of a th material, the motor shell comprises a second material part which is at least made of a second material, and at least part of the second material part is exposed out of the tool shell assembly.

Description

Pruning machine

Technical Field

The invention relates to pruners.

Background

The pruner is kinds of garden or gardening tools, which includes a blade and a front handle and a rear handle, the blade reciprocates for cutting various shrubs, hedges, etc. in the pruning work, a user holds two different handles with both hands, respectively, and the user controls the cutting position by moving the handles to control the position of the blade.

The shell structure of the traditional pruner is relatively fixed, and the positions of the front handle and the rear handle cannot be adjusted, so that the pruner cannot efficiently work under complex working conditions. The cutting machine can only adapt to simple horizontal plane cutting, is difficult to operate when vertical cutting or inclined cutting is needed, and is very inconvenient to hold the handles with two hands.

The shell of the traditional pruner is made of single materials, so that the radiating effect is poor, and after long-time work, the pruner is easy to damage due to overhigh temperature.

In order to lower the temperature of the motor and speed up cooling, a conventional motor is generally provided with a heat dissipation fan. However, when the heat dissipation fan rotates, the airflow is easily rotated in the motor housing, thereby causing poor cooling effect.

Disclosure of Invention

pruner comprises th case forming or connecting th handle, second case forming or connecting second handle, transmission mechanism combined with th case, pruning blade driven by the transmission mechanism to do shearing movement, motor combined with th case for driving the transmission mechanism, and battery pack combined with the second case for supplying power to the motor, wherein th case and the second case respectively comprise rotation connection part and second rotation connection part which make them form rotation connection by taking rotation axis as shaft, the second case has th rotation position and second rotation position when rotating relative to th case, and the plane vertical to the rotation axis is intersected with the plane vertical to the longitudinal axis of the pruning blade in an inclined way.

, the th rotary connection and the motor are located on the same side of the pruning blade in a plane perpendicular to the longitudinal axis of the pruning blade.

, the th pivotal connection and the th handle are located on the same side of the pruning blade in a plane perpendicular to the longitudinal axis of the pruning blade.

, the second housing rotates to a rotational position in which the longitudinal axis of the second handle lies in a plane parallel to the longitudinal axis of the pruning blade and rotates 90 degrees relative to a rotational position.

, the second handle has median planes, the second handle is at least partially symmetrical with respect to the median planes, and the median planes of the second handle are parallel to the longitudinal axis of the pruning blade when the second housing is rotated to the rotated position.

, the secondary handle has median planes, the secondary handle includes a main handle portion for holding by the user, the main handle portion is symmetrical with respect to the median plane, and the center of gravity of the main handle portion and the battery pack are located on both sides of the longitudinal axis of the pruning blade in the median plane when the secondary housing is in the second rotational position.

, the second handle rotates to a position nearest to the th handle in a direction parallel to the longitudinal axis of the pruning blade when the second housing rotates to the th rotational position, and the distance between the second handle and the th handle is greater than the distance between the second handle and the th handle when the second housing rotates to the th rotational position.

, the second handle and the battery pack are positioned on opposite sides of the longitudinal axis of the pruning blade when the second housing is rotated to the second rotational position.

, when the second shell rotates to the second rotation position, the centers of gravity of the second handle and the battery pack are respectively located on two sides of the median plane of the front handle.

, when the second housing is rotated to the second rotational position, the second handle and the battery pack are located on opposite sides of a plane defined by the intersection of the axis of the motor and the longitudinal axis of the pruning blade.

pruning machine comprises a motor including a stator assembly and a rotor assembly, a transmission mechanism driven by the motor, a pruning blade driven by the transmission mechanism to do shearing movement, a motor housing for accommodating the rotor assembly of the motor, and a tool housing assembly for integrating the transmission mechanism and the motor housing into whole bodies, wherein the tool housing assembly comprises a material part made of at least a material, and the motor housing comprises a second material part made of at least a second material, and at least part of the second material part is exposed out of the tool housing assembly.

the pruner further includes a drive housing for housing the drive mechanism, the drive housing exposing the tool assembly.

, the transmission housing is at least partially made of a metal material.

, the second material portion exposes the tool housing assembly from the side and the transmission housing exposes the tool housing assembly from the opposite side .

the transmission casing comprises a casing body with a cavity, several ribs protruding outwards from the casing body, and an airflow channel between two ribs.

, the airflow path extends generally in a direction parallel to the axis of the motor.

, a fan is disposed in the motor housing, an air outlet is disposed in the motor housing, and an air flow generated by the fan enters the motor housing through the air flow channel and is then discharged from the air outlet.

, a circuit board is arranged in the tool casing assembly, an air inlet is formed in the tool casing, and the air flow generated by the fan passes through the air inlet, the circuit board, the motor and the air outlet in sequence.

the pruner further includes a th handle positioned between the pruning blade and the motor, a th handle secured to the drive housing.

the pruner further comprises a battery pack for powering the motor, the tool housing comprising a th housing and a second housing, the th housing forming or having attached thereto a th handle, the second housing forming or having attached thereto a second handle, the battery pack being coupled to the second housing, the th housing and the second housing comprising a th rotational connection and a second rotational connection respectively pivotally connected thereto about an axis of rotation, the second housing having, when rotated relative to the th housing, a th rotational position and a second rotational position, a plane perpendicular to the axis of rotation being obliquely intersected by a plane perpendicular to the longitudinal axis of the pruning blade.

pruning machine comprises a first casing forming or connected with a first 0 handle, a second casing forming or connected with a second handle, a transmission mechanism coupled to a second casing, a pruning blade driven by the transmission mechanism to do shearing movement, a motor coupled to a th casing for driving the transmission mechanism, a battery pack coupled to the second casing for supplying power to the motor, wherein the second casing is rotatable about a rotation axis relative to a th casing, the th casing comprises a th locking portion, the pruning machine further comprises a control member movably connected to a th casing or the second casing, the control member comprises a second locking portion engaged with a th locking portion, the control member has a th position and a second position relative to the second casing, when the control member is at the th position, the locking portion is engaged with the second locking portion, the second casing is relatively fixed to the th casing, and when the control member is at the second position, the th locking portion is disengaged from the second locking portion, and the second casing is rotatable about the rotation axis .

the pruner further comprises a trigger for controlling the motor, the control member further comprises a stopper, and the stopper stops movement of the trigger when the control member is in the second position.

, the check member further includes an operating part for operation by a user, a th locking part is formed with a groove, and a second locking part is formed with a projection that fits in the groove.

, the operating portion is located between the second handle and the battery pack.

, the pruner further comprises a biasing element fixedly attached to the second housing for applying a biasing force that moves the control member from the second position to the position.

, the control member slides along a linear path between a position and a second position.

, a shock absorbing member is included and is disposed between the rotational connection and the second rotational connection.

, the th shell is provided with a plurality of gear structures which can enable the control member to lock the relative positions of the th shell and the second shell, and the difference angle between the adjacent gear structures relative to the circumferential direction of the rotating axis is 15 degrees or integral multiple of 15 degrees.

, the second housing has a th rotational position and a second rotational position relative to the th housing, the second housing rotates to the th rotational position with the longitudinal axis of the second handle lying in a plane parallel to the longitudinal axis of the pruning blade, and the second housing rotates to the second rotational position with the second handle rotated 90 degrees relative to the th rotational position.

Step , the axis of rotation intersects the axis of the motor at an angle.

, a plane perpendicular to the axis of rotation intersects obliquely a plane perpendicular to the longitudinal axis of the pruning blade.

A motor device comprises a motor shell provided with an air outlet, a stator assembly fixedly connected with the motor shell, a rotor assembly rotatably connected with the stator assembly, a fan arranged in the motor shell, and an air guide cover accommodated in the motor shell, wherein the air guide cover comprises a flow shielding part for stopping airflow generated by the fan from rotating in the motor shell, and the flow shielding part is arranged between the inner wall of the motor shell and the fan.

the rotor assembly drives the fan to rotate, and the flow shielding part and the air outlet are staggered in the circumferential direction of the fan rotating shaft.

, the rotor assembly drives the fan to rotate, and the flow shielding part is basically aligned with the air outlet in the axial direction of the rotating shaft of the fan.

, the number of the flow blocking parts is more than or equal to 2, and an air outlet is arranged between at least two of the flow blocking parts.

the rotor assembly drives the fan to rotate, the number of the flow shielding parts is more than or equal to 2, and at least two of the flow shielding parts are symmetrical about the rotating shaft of the fan.

, the rotor assembly drives the fan to rotate, the number of the flow shielding parts is more than or equal to 2, the wind scooper further comprises a connecting part which is connected with the plurality of flow shielding parts, a surrounding part which surrounds the rotor assembly, and the surrounding part and the connecting part are respectively positioned on two sides of the fan.

, the surrounding portion is formed with a snap that is connected to the motor housing.

, the clearance between the surrounding part and the motor is more than or equal to 0.3mm and less than or equal to 3 mm.

And pruning machines including the motor device.

the pruner further comprises a th housing and a second housing, the th housing forming or connecting with a th handle, the second housing forming or connecting with a second handle, a battery pack coupled to the second housing and used for supplying power to the external rotor motor, the th housing and the second housing respectively comprise a th rotation connection part and a second rotation connection part which make them form a rotation connection with the rotation axis as an axis, the second housing has a th rotation position and a second rotation position when rotating relative to the th housing, and a plane vertical to the rotation axis obliquely intersects with a plane vertical to the longitudinal axis of the pruning blade.

Drawings

FIG. 1 is a schematic representation of embodiments of the present invention;

FIG. 2 is a schematic view of the pruner of FIG. 1 with a portion of the housing removed;

FIG. 3 is a schematic view of the pruner of FIG. 1 with the second housing in a rotated position;

FIG. 4 is a schematic view of the pruner of FIG. 1 with the second housing in a second rotational position;

FIG. 5 is a schematic view from another perspective of the pruner of FIG. 1 with the second housing in a second rotational position;

FIG. 6 is a partial exploded view of the pruner of FIG. 1;

FIG. 7 is a schematic view of the pruner of FIG. 1 with the control member in position ;

FIG. 8 is a schematic view of the pruner of FIG. 1 with the control member in a second position;

FIG. 9 is a schematic airflow direction view of the pruner of FIG. 1;

FIG. 10 is a cross-sectional view of the pruner of FIG. 1;

fig. 11 is an exploded view of a portion of the structure of the pruner of fig. 1.

Detailed Description

The invention is described in detail below with reference to the figures and the embodiments.

As shown in fig. 1, pruning machines 100 comprise a pruning blade 10, a transmission mechanism 20, a motor 30, a battery pack 40, a tool housing assembly 50, a handle 60 and a second handle 70.

The pruning blade 10, performing a cutting motion to perform a tool function, extends substantially in directions, the dimension of the pruning blade 10 in this direction being substantially greater than the dimension in the remaining directions, which are defined as the length direction of the pruning blade 10, and as shown in fig. 1, the pruning blade 10 defines a longitudinal axis S1, the longitudinal axis S1 being parallel to the length direction of the pruning blade 10.

The main body portion of the pruning blade 10 extends along a longitudinal axis S1, and a plurality of cutting edges 11 are formed by the main body portion of the pruning blade 10 along the longitudinal axis S1 in a manner to project in a direction perpendicular to the longitudinal axis S1, the dimension in the direction perpendicular to the longitudinal axis S1 being the width of the pruning blade 10.

The smaller dimension of the pruning blade 10 in the other directions perpendicular to the longitudinal axis S1 makes the pruning blade 10 substantially a sheet-like structure.

, the cutting edge 11 may be disposed either to the longitudinal axis S1 of the pruning blade 10 or on either side of the longitudinal axis S1 of the pruning blade 10. specifically, as shown in FIG. 1, the cutting edge 11 extends outwardly from either side of the longitudinal axis S1.

The transmission mechanism 20 is connected with the pruning blade 10 and drives the pruning blade 10 to reciprocate. The transmission housing 21 accommodates the transmission mechanism 20. Accommodating the transmission mechanism 20 refers to accommodating all of the transmission mechanism 20 or a portion of the transmission mechanism 20.

The motor 30 is connected to the transmission mechanism 20 to drive the transmission mechanism 20.

The battery pack 40 provides power to the motor 30. Which comprises a plurality of rechargeable battery cores.

The tool housing assembly 50 assembles the parts of the pruner 100, which includes a housing 51 and a second housing 52.

The fifth housing 51 is formed with or connected with a fifth handle 60 of , the second housing 52 is formed with or connected with a second handle 70, the fifth handle 60 of 0 and the second handle 70 are provided for being held by a single hand of a user, i.e., the fourth handle 60 of is provided for being held by a hand of a user , the second handle 70 is provided for being held by another hand of the user , the fifth handle 60 and the second handle 70 are provided for being held by a single hand of the user, i.e., the fifth handle 60 is provided for being directly or indirectly connected to the housing, i.e., the fourth handle 60 is provided for being indirectly connected to the housing by other structure, i.e., the fifth handle 60 is provided for being held by another hand of the user, i.e., the fifth handle 30 is provided for being held by another hand of the user, i.e., the fifth handle as part of the housing, the fifth handle is provided for being directly connected to the housing of the trimming tool, i.e., the fifth handle 30 is directly or indirectly connected to the housing of the other structure, i.e., the fifth handle 30 is indirectly connected to the housing of the other structure, i.e., as shown in fig. 1, the transmission 20 and the fifth housing 30 is provided for being combined with the th housing 51 of 365, i.e., the housing 20 and the housing 30 is provided for being fixed relative to the fifth handle 30 is provided for being fixed relative to the housing of the fifth housing of the trimming tool, i.e., the fifth housing of the fifth handle assembly of the fifth housing of the fifth handle 24, i.e., which is provided for being fixed relative to the fifth handle 24, which is provided for being fixed relative to the fifth handle 30, which is provided for being directly connected to the fifth handle 30, which is provided for being fixed relative to the fifth handle assembly of the fifth handle 20, which is provided for being fixed relative to the fifth handle assembly of the fifth handle 30, which is provided for being used for being.

As shown in FIG. 3, the -th casing 51 includes a rotation connecting portion 511, the second casing 52 includes a second rotation connecting portion 521, the -th rotation connecting portion 511 is rotatably connected to the second rotation connecting portion 521, so that the -th casing 51 and the second casing 52 can rotate around the rotation axis S2, when the -th casing 51 and the second casing 52 rotate relatively, the motor 30, the transmission mechanism 20, the -th handle 60 and the -th casing 51 rotate relatively to the second casing 52, and the battery pack 40, the second handle 70 and the second casing 52 rotate relatively to the -th casing 51.

The plane A perpendicular to the rotation axis S2 obliquely intersects the plane B perpendicular to the longitudinal axis S1 of the pruning blade 10. the plane A perpendicular to the rotation axis S2 obliquely intersects the plane B perpendicular to the extending direction of the pruning blade 10. further , the rotation axis S2 obliquely intersects the pruning blade 10. specifically, the plane A perpendicular to the rotation axis S2 makes an angle of 15 ° with the plane B perpendicular to the longitudinal axis S1 of the pruning blade 10. the angle may be equal to or greater than 10 ° and equal to or less than 45 °.

In a plane B perpendicular to the longitudinal axis S1 of the pruning blade 10, the rotary connection 511 and the motor 30 are located on the same side of the pruning blade 10, i.e. the rotary connection 511 is remote from the longitudinal axis S1 of the pruning blade 10. in particular, the intersection of the rotary axis S2 between the rotary connection 511 and the second rotary connection 521 is offset from the longitudinal axis S1 of the pruning blade 10.

The rotational connection 511 and the handle 60 are located on the same side of the pruner 100 blade in a plane B perpendicular to the longitudinal axis S1 of the pruner blade 10. specifically, the rotational connection 511 and the handle 60 are located on the same side of the pruner blade 10 means that the rotational connection 511 and the handle 60 grip are located on the same side of the pruner blade 10. the pruner blade 10 defines shear planes, the rotational connection 511 and the motor 30 are located on the same side of the shear planes, and the rotational connection 511 and the handle 60 are located on the same side of the shear planes.

Specifically, the rotation axis S2 obliquely intersects the axis of the motor 30, the intersection of the rotation axis S2 with the axis of the motor 30 is located on the same side of the pruning blade 10 as the second rotation connection 521, the distance of the intersection of the rotation axis S2 between the rotation connection 511 and the second rotation connection 521 of the third is greater than the distance of the intersection of the rotation axis S2 with the axis S3 of the motor 30 from the pruning blade 10, the distance of the intersection of the rotation axis S2 with the axis S3 of the motor 30 from the longitudinal axis S1 of the pruning blade 10 is greater than or equal to 20mm and less than or equal to 60mm, and the distance of the intersection of the rotation axis S2 between the rotation connection 511 and the second rotation connection 521 of the third is greater than or equal to 30mm and less than or equal to 70mm from the longitudinal axis S1 of the pruning blade 10.

The plane a perpendicular to the axis of rotation S2 intersects obliquely the plane B perpendicular to the longitudinal axis S1 of the pruning blade 10 so that when the second housing 52 is rotated 90 ° relative to the -th housing 51, as shown in fig. 4, the battery pack 40 can be moved away from the pruning blade 10, avoiding interference with the operation caused by the excessive volume of the battery pack 40 during operation and also avoiding damage to the battery pack 40.

The second housing 52 has a second rotational position and a second rotational position when rotated relative to the th housing 51, the th rotational position is shown in fig. 3, the second rotational position is shown in fig. 4 and 5, the th rotational position is the initial position of the second housing 52, which is also the most common operating position of the pruner 100, and the th rotational position, in which the longitudinal axis S4 of the second handle 70 lies in a plane parallel to the longitudinal axis S1 of the pruning blade 10, which parallel also includes the longitudinal axis S1 of the pruning blade 10 lying in a plane of the longitudinal axis S4 of the second handle 70.

The secondary handle 70 includes a primary handle portion for a user to grasp and control the pruner 100. the user, when using the secondary handle 70, can touch buttons and switches disposed nearby, more specifically, the primary handle portion is symmetrical with respect to planes, defining the plane of symmetry as the median plane C of the secondary handle 70. the secondary handle 70 can be disposed either entirely symmetrical with respect to the median plane C or partially symmetrical with respect to the median plane C. the portion of the secondary handle 70 that is mirror symmetrical can include, but is not limited to, the primary handle portion. the longitudinal axis S4 of the secondary handle 70 lies within the median plane C of the secondary handle 70.

When the second housing 52 is rotated to the second rotation position, the second handle 70 is rotated 90 ° relative to the rotation position, and then steps, the second housing 52 can be rotated and fixed relative to the housing 51 at different positions to meet the user 'S requirements under various working environments, relative to the rotation axis S2, the connected rotation positions are different by an angle of 15 ° or an integral multiple of 15 °, and when the second handle 70 is rotated 90 °, that is, the second rotation position, the user' S requirements for trimming the vertical plane can be met.

The second handle 70 is rotated to a position closest to the th handle 60 in a direction parallel to the longitudinal axis S1 of the pruning blade 10 when the second housing 52 is in the rotated position the distance between the second handle 70 and the th handle 60 is greater when the second housing 52 is rotated to the second rotated position than when the second housing 52 is rotated to the th rotated position the distance between the second handle 70 and the th handle 60.

In the second rotated position, the distance of the th handle 60 relative to the second handle 70 is greater than in the th rotated position the rotation axis S2 is inclined to the pruning blade 10 and, upon rotation of the second housing 52, the distance between the th handle 60 and the second handle 70 increases, making it more comfortable for the user to hold after rotation of the second handle 70.

The longitudinal axis S4 of the second handle 70 is within the bisecting plane C of the second handle 70. The plane of symmetry of the second handle 70 is the bisecting plane C of the second handle 70.

As shown in fig. 5, the center of gravity of the second handle 70 and the battery pack 40 is located on either side of the longitudinal axis S1 of the pruning blade 10 in the plane of the longitudinal axis S4 of the second handle 70 when the second housing 52 is in the second rotational position.

The plane of the longitudinal axis S4 of the second handle 70, i.e., the median plane c of the second handle 70, is further steps, and in the second position, the second handle 70 and the battery pack 40 are located on either side of the longitudinal axis S1 of the pruning blade 10, respectively, and specifically, the second rotational position is rotated 90 ° relative to the rotational position.

In the second position, the centers of gravity G of the second handle 70 and the battery pack 40 are located on opposite sides of the bisecting plane of the handle 60 at . the th handle 60 includes at least a mirror-image portion defining a plane of symmetry that is the bisecting plane of the th handle 60.

In the second position, the second handle 70 and the battery pack 40 are located on either side of a plane defined by the intersection of the axis of the motor 30 and the longitudinal axis S1 of the pruning blade 10.

As shown in fig. 6, the second housing 52 is rotatable about a rotation axis S2 with respect to the th housing 51, and the th housing 51 includes the th lock 5111, specifically, the th lock 5111 is formed by the th rotation connecting portion 511.

The pruner 100 further comprises a control member 91, wherein the control member 91 is used for locking the position of the second shell 52 relative to the th shell 51, the control member 91 comprises a second locking part 911, the second locking part 911 is matched with the locking part 5111, the control member 91 is movably connected to the th shell 51 or the second shell 52, in particular, the control member 91 is movably connected to the second shell 52, the control member 91 has a th position and a second position relative to the second shell 52, and in steps, the control member 91 and the second shell 52 rotate relative to the th shell 51.

As shown in fig. 7, when the check member 91 is located at the th position, the locking portions 5111 are engaged with the second locking portions 911, and the second housing 52 is fixed to the th housing 51, i.e., the second housing 52 cannot rotate relative to the th housing 51 about the rotation axis S2.

As shown in fig. 8, when the check member 91 is located at the second position, the first locking parts 5111 are disengaged from the second locking parts 911, and the second housing 52 can rotate about the rotation axis S2 with respect to the third housing 51.

The pruner 100 further comprises a trigger 80 capable of controlling the motor 30.

The control member 91 includes a stop 912, as shown in FIG. 8, which stop 912 stops the movement of the trigger 80 when the control member 91 is in the second position, specifically, as shown in FIG. 8, the trigger 80 is stopped from upward movement by the stop 912. there is a high safety feature to prevent the motor 30 from being activated by a malfunction when the second housing 52 can rotate relative to the th housing 51. as shown in FIG. 7, the control member 91 is in the th position, where the trigger 80 can be activated. the position shown in the figure is where the trigger 80 is depressed to activate.

The check member 91 further includes an operating portion 913 by which the user moves the operating check member 91 between the th position and the second position, the th locking portion 5111 is formed with a groove 5112, the second locking portion 911 is formed with a projection 9111 engaged with the groove 5112, the projection 9111 is engaged with the groove 5112 to achieve locking, the projection 9111 of the second locking portion 911 is located in the groove 5112 of the second locking portion 911 when the user operates the check member 91 to move to the th position, the th locking portion 5111 and the second locking portion 911 are not relatively rotatable, that is, the th housing 51 and the second housing 52 are not relatively rotatable, when the user operates the check member 91 to move to the second position, the projection 9111 is disengaged from the groove 5112, that is, not to prevent the relative rotation between the th housing 51 and the second housing 52, specifically, as shown in fig. 6, the groove 5112 has a plurality, each groove 5112 corresponds to the th housing 51 and the second housing 52 being rotatably fixed to each other, the grooves 5112 are located at ± 180 ° as shown in fig. 6, and 3690 ° as shown in fig. 6.

As shown in fig. 7 and 8, the operation part 913 is located between the second handle 70 and the battery pack 40, and step , the trigger 80 and the operation part 913 are located on the same side of the second handle 70, so that a space is reasonably used, and a compact structure is realized.

The pruner 100 further comprises a biasing member 92 fixedly connected to the second housing 52 for applying a biasing force to move the control member 91 from the second position to the th position, generally refers to the biasing member 92 as a member for generating the biasing force, such as a spring, a magnet, etc. more specifically, the biasing member 92 is a spring, which connects the second housing 52 and the control member 91, so that when the control member 91 is located at the th position, the control member 91 can be ensured to stay at the th position, thereby preventing the relative rotation between the th housing 51 and the second housing 52 caused by the misoperation of the user.

The control member 91 slides along a linear path between the th position and the second position the control member 91 is simple to operate and the sliding path is short and quick to operate.

As shown in FIG. 6, the pruner 100 further comprises a shock absorbing member 53, the shock absorbing member 53 is disposed between the th rotary connection part 511 and the second rotary connection part 521. the pruner blade 10 and the motor 30 are fixed to the th housing 51, and during operation, vibration is generated, and the shock absorbing member 53 can effectively reduce the vibration transmitted to the second housing 52, so that the vibration on the second handle 70 is reduced, and the operation is comfortable for the user.

The th housing 51 is provided with a plurality of shift positions which enable the control member 91 to lock the th and

second housings

51 and 52 in relative positions the associated shift positions differ by an angle which is 15 or an integer multiple of 15 with respect to the circumferential direction of the rotational axis S2. that is, the second housing 52 can be locked at an angle which is 15 or an integer multiple of 15 with respect to the th housing 51.

As shown in FIG. 9, the pruner 100 further comprises a motor housing 33, the motor housing 33 contains the motor 30, the tool housing assembly 50 comprises a th material portion 54, the th material portion 54 is made of at least the 0 th material, specifically, as shown in FIG. 9, the 1 th housing 51 comprises a 2 th material portion 54, the motor housing 33 comprises a second material portion 331, the second material portion 331 is made of at least the second material, the 3 th material portion 54 can be the whole of the tool housing assembly 50 or can be the portion of the tool housing assembly 50. specifically, the th housing 51 is made of a th material, the th material has a lower thermal conductivity, the second material has a higher thermal conductivity, i.e., the second material has a higher thermal conductivity than the th material, the th material portion 54 is made of the th material having a lower thermal conductivity, and the second material portion 331 is made of the second material having a higher thermal conductivity, more specifically, the second material is plastic, and the second material is a metal.

The second material portion 331 is at least partially exposed from the tool housing component 50, i.e., all or a portion of the second material portion 331 is exposed outside of the tool housing component 50, or the second material portion 331 protrudes or protrudes through the tool housing component 50.

, the tool housing assembly 50 of the conventional pruner 100 directly encloses the motor 30, which is made of materials, such as plastic, which has a low thermal conductivity and poor heat dissipation effect, the motor 30 is located in the plastic material, which is prone to over-temperature and damage of the motor 30, and the tool housing assembly 50 is made of metal for heat dissipation, which results in a heavy weight of the whole pruner 100 as a handheld tool, which is not easy to carry and operate.

Adopt the tool housing subassembly 50 not directly to wrap up motor 30, set up solitary motor casing 33 and hold motor 30, motor casing 33 adopts the material that coefficient of heat conductivity is high, can release motor 30's heat fast, reduces motor 30 temperature. The tool housing assembly 50 is made of a material with a low thermal conductivity to achieve a heat insulation effect, and damage to a human body caused by high temperature is avoided. The second material portion 331 of the motor housing 33 is exposed or protruded from the tool housing assembly 50, so that the contact area between the second material portion 331 and the air is increased, and the heat dissipation of the motor 30 is accelerated.

The transmission housing 21 exposes the tool housing assembly 50. Exposed means at least partially outside of the tool housing assembly 50. The compact structure is realized, the volume of the tool shell component 50 is reduced, the weight is reduced, and the tool shell component is convenient for a user to carry.

The transmission housing 21 is at least partially made of a metallic material. The transmission case 21 is made of a metal material to accelerate heat dissipation. The temperature of the pruner 100 is favorably reduced, the transmission housing 21 is exposed out of the tool housing assembly 50, the contact area with air is increased, and the heat dissipation effect is improved.

The second material portion 331 exposes the tool housing assembly 50 from the side and the transmission housing 21 exposes the tool housing assembly 50 from the opposite side or the motor housing 33 and the transmission housing 21 protrude from the tool housing assembly 50 from opposite sides of the tool housing assembly 50. specifically, as shown in fig. 9, the motor housing 33 and the transmission housing 21 protrude from the th housing 51 from opposite sides of the th housing 51.

Specifically, as shown in fig. 9, the transmission housing 21 includes a transmission housing body 211 and transmission housing ribs 212, as shown in fig. 10, the transmission housing body 211 is formed with a receiving cavity 2111, and the receiving cavity 2111 receives the transmission mechanism 20, as shown in fig. 9, a plurality of transmission housing ribs 212 are protruded outwardly from the transmission housing body 211, and an air flow passage 2121 is formed between two connected transmission housing ribs 212, specifically, the air flow passage 2121 extends substantially in a direction parallel to the axis of the motor 30, that is, the air flow can flow from the transmission housing 21 side to the motor housing 33 side along the air flow passage 2121.

As shown in fig. 9 to 11, a fan 34 is provided in the motor housing 33. The motor housing 33 is provided with an air outlet 332, and the motor 30 drives the fan 34 to rotate. As shown by the arrows in fig. 9, the airflow generated by the fan 34 enters the motor housing 33 through the airflow passage 2121 and is discharged from the air outlet 332.

As shown in fig. 2, a circuit board 93 is provided in the tool housing assembly 50, the circuit board 93 electrically connects the motor 30 and the battery pack 40, the circuit board 93 is provided in the -th housing 51 in front of the motor 30, i.e., in the direction of the longitudinal axis S1 of the pruning blade 10, the circuit board 93, the motor 30, and the battery pack 40 are arranged in sequence, or the circuit board 93, the motor 30, and the second housing 52 are arranged in sequence in the direction of the longitudinal axis S1 of the pruning blade 10, as shown in fig. 9, the tool housing assembly 50 is formed with an air inlet 512, and as shown by arrows in fig. 9, the air flow generated by the fan 34 passes through the air inlet 512, the circuit board 93, the motor 30, and the air.

As shown in fig. 10-11, the motor 30 includes a stator assembly 31 and a rotor assembly 32, the rotor assembly 32 of the motor 30 is housed in a motor housing 33, the motor apparatus includes a motor housing 33, a motor 30, a fan 34, and a wind scooper 35, the rotor assembly 32 rotates relative to the stator assembly 31 and the motor housing 33, the rotor assembly 32 is coupled to the gear 20 and drives the gear 20 when the rotor assembly 32 rotates, the fan 34 rotates with the rotor assembly 32 of the motor 30. generally refers to a variety of conventional motors 30, such as a dc motor 30, an ac motor 30, and the like, specifically, the motor 30 refers to an outer rotor motor, specifically, a brushless outer rotor dc motor, the fan 34 is formed on or fixedly coupled to the rotor assembly 32, i.e., the fan 34 may be directly formed by the rotor assembly 32, or may be mounted as a separate component on the rotor assembly 32, further refers to a step in which the fan 34 is fixedly coupled.

In order to improve the cooling efficiency, the pruner 100 further comprises a wind scooper 35, the wind scooper 35 is positioned in the motor housing 33 and fixed to the motor housing 33, the wind scooper 35 is stationary relative to the motor housing 33, the wind scooper 35 comprises a flow blocking portion 351, the flow blocking portion 351 stops the airflow generated by the fan 34 from revolving in the motor housing 33, the flow blocking portion 351 is positioned between the inner wall of the motor housing 33 and the fan 34, and the flow blocking portion 351 is positioned in the circumferential direction of the rotation of the rotor assembly 32, the flow blocking portion 351 interrupts the rotation of the airflow in the motor housing 33, and promotes the airflow generated by the fan 34 to scatter, thereby improving the cooling efficiency.

The motor housing 33 is formed with an air outlet 332, and the flow blocking portion 351 and the air outlet 332 are provided to be offset in the circumferential direction of the rotation shaft of the fan 34. Specifically, the offset arrangement means that the flow blocking portion 351, the air outlet 332, the flow blocking portion 351, and the air outlet 332 are arranged in this order in the circumferential direction of the rotation shaft of the fan 34. The air outlet 332 is connected to the flow blocking portion 351 in the circumferential direction of the rotation of the rotor assembly 32. The flow shielding portion 351 is substantially aligned with the air outlet 332 in the axial direction of the rotation shaft of the fan 34. The height of the air outlet 332 and the fan 34 in the axial direction of the rotor assembly 32 is substantially equal.

The number of the flow shielding parts 351 is greater than or equal to 2, and at least two of the flow shielding parts 351 are symmetrical about the rotating shaft of the fan 34. The wind scooper 35 further includes a connection portion 352, and the connection portion 352 connects the plurality of flow blocking portions 351. At least two flow blocking portions 351 are connected by a connection portion 352. The connecting portion 352 is fixed to the top of the motor housing 33.

For an external rotor motor, when the gap between the rotor assembly 32 and the motor housing 33 is too large, most of the airflow passes through the surface of the motor 30, the airflow passing through the inside of the motor 30 is small, and the cooling effect is poor. In order to reduce the clearance between the motor 30 and the motor housing 33. Wind scooper 35 further includes a surround 353, and surround 353 surrounds rotor assembly 32. The surrounding portion 353 and the connecting portion 352 are located on both sides of the fan 34. The surrounding portion 353 is formed with a catch 3531, and the catch 3531 is coupled to the motor housing 33.

When the clearance between the surrounding portion 353 and the motor 30 is small, the cooling effect of the outer surface of the rotor assembly 32 is deteriorated, resulting in low cooling efficiency, and when the clearance between the surrounding portion 353 and the motor 30 is large, the flow of air passing through the motor 30 is small, resulting in deterioration of the cooling effect of the motor 30 as well, steps are performed, the clearance between the surrounding portion 353 and the motor 30 is 0.3MM or more and 3MM or less, and steps are performed, the clearance between the surrounding portion 353 and the motor 30 is 0.5MM or more and 1.5MM or less.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1, A pruner, comprising:

a motor including a stator assembly and a rotor assembly;

a transmission mechanism driven by the motor;

the pruning blade is driven by the transmission mechanism to do shearing motion;

a motor housing for receiving a rotor assembly of the motor;

the tool shell component enables the transmission mechanism and the motor shell to form integral bodies;

a transmission housing for accommodating the transmission mechanism, the transmission housing being at least partially made of a metal material;

wherein the content of the first and second substances,

the tool housing assembly includes:

an th section of material made of at least a th material;

the motor housing includes:

a second material portion made of at least a second material;

the second material portion at least partially exposes the tool housing assembly; the transmission housing is at least partially located outside of the tool housing assembly;

the thermal conductivity of the second material is greater than the thermal conductivity of the th material.

2. The pruner of claim 1,

the second material portion exposes the tool housing assembly from the side and the transmission housing exposes the tool housing assembly from the opposite side .

3. The pruner of claim 1,

the transmission housing comprises a transmission casing and a transmission mechanism,

the transmission shell body is provided with an accommodating cavity;

the transmission shell ribs protrude outwards from the transmission shell body;

and an air flow channel is formed between the transmission shell ribs.

4. The pruner of claim 3,

the airflow passage extends generally in a direction parallel to the motor axis.

5. The pruner of claim 3,

a fan is arranged in the motor shell,

the motor shell is provided with an air outlet,

and the air flow generated by the fan enters the motor shell from the air flow channel and is discharged from the air outlet.

6. The pruner of claim 5,

a circuit board is arranged in the tool shell component,

the tool housing is formed with an air inlet,

the air current that the fan produced passes through air intake, circuit board, motor and air outlet in proper order.

7. The pruner of claim 1,

the pruner also comprises a th handle positioned between the pruning blade and the motor;

the th handle is secured to the transmission housing.

8. A pruner according to any claim 1 to 7, ,

the pruner also comprises a battery pack for supplying power to the motor;

the tool housing includes a th housing and a second housing,

the th shell, form or connect with th handle;

the second shell is formed or connected with a second handle;

the battery pack is coupled to the second housing;

the th and second housings include and second rotational connections, respectively, that make them rotationally connected about an axis of rotation;

the second shell rotates relative to the th shell and has a th rotating position and a second rotating position,

a plane perpendicular to the axis of rotation intersects obliquely a plane perpendicular to the longitudinal axis of the pruning blade.

9. The pruner of claim 8,

the th rotary connection and the motor are located on the same side of the pruning blade in a plane perpendicular to the longitudinal axis of the pruning blade.