WO2020001634A1 - 长杆类园林工具 - Google Patents

长杆类园林工具 Download PDF

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Publication number
WO2020001634A1
WO2020001634A1 PCT/CN2019/093783 CN2019093783W WO2020001634A1 WO 2020001634 A1 WO2020001634 A1 WO 2020001634A1 CN 2019093783 W CN2019093783 W CN 2019093783W WO 2020001634 A1 WO2020001634 A1 WO 2020001634A1
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WO
WIPO (PCT)
Prior art keywords
garden tool
trigger
long pole
tool according
motor
Prior art date
Application number
PCT/CN2019/093783
Other languages
English (en)
French (fr)
Inventor
戴开超
聂方杰
李立
彼得·拉迈利
漆芹
Original Assignee
南京德朔实业有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201810683072.9A external-priority patent/CN110651588B/zh
Priority claimed from CN201821015812.3U external-priority patent/CN208572785U/zh
Priority claimed from CN201821015752.5U external-priority patent/CN208754706U/zh
Application filed by 南京德朔实业有限公司 filed Critical 南京德朔实业有限公司
Priority to CN201980007617.7A priority Critical patent/CN111669966B/zh
Publication of WO2020001634A1 publication Critical patent/WO2020001634A1/zh

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • 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
    • A01G3/06—Hand-held edge trimmers or shears for lawns

Definitions

  • the present disclosure belongs to the technical field of garden tools, and for example, relates to a long pole garden tool.
  • pole-type garden tools there are two types of pole-type garden tools in related technologies. One of them is a pole-type garden tool using an AC electric motor. The pole-type garden tool directly connects to the AC power through a power cord. It is inconvenient to work; another type of long pole garden tool that uses a separate battery pack has a small battery pack and poor endurance, so the outdoor work time is short. Therefore, on the basis of a separate battery pack, a long pole garden tool using a backpack type battery pack has appeared. Since the backpack type battery pack is carried by the operator, the main body of the long pole garden tool does not include a battery pack, but the long pole type garden tool is electrically connected to the backpack type battery pack through a power cord. The capacity can be large, further extending the working time of long pole garden tools.
  • the garden tool includes a motor.
  • the motor is fixedly connected to the end of a stainless steel tube.
  • the upper part of the motor is provided with a control switch and a power line socket. Therefore, when inserting or removing the power cord, the operator needs to twist his body, lift his arm, and pull out the plug. The operator's twisted posture and arm lift increase the labor burden on the human body.
  • the present disclosure provides a long pole garden tool, which enables a user to easily plug in a power cord.
  • a long pole garden tool includes: a mowing mechanism configured to cut grass; a power output portion located at one end of the mowing mechanism, the power output portion including a motor and a first casing, and the first casing
  • the body is also provided with a power interface, the power interface is a socket for inserting a power plug, the first housing is provided with a receiving cavity, and the motor is disposed in the receiving cavity; at least An electronic component; and a connecting rod that connects the mowing mechanism and the power output portion in a first direction; wherein the socket is opened toward a second direction, and a portion formed between the second direction and the first direction
  • the included angle is greater than or equal to 0 degrees and less than 90 degrees, and the first direction is a direction in which the power output portion points to the mowing mechanism.
  • FIG. 1 is a perspective view of an example of a long pole garden tool for installing a mowing head according to an embodiment
  • FIG. 2 is a perspective view of a long-blade garden tool mounting blade according to an embodiment
  • FIG. 3 is a cross-sectional view of a power output portion of the long pole garden tool in FIG. 1;
  • FIG. 4 is a cross-sectional view from another perspective of the power output portion of the long pole garden tool in FIG. 1;
  • FIG. 5 is a schematic perspective view of a power output portion of the long pole garden tool in FIG. 1;
  • FIG. 6 is a schematic perspective view of the power output portion of the long-bar type garden tool in FIG. 1 from another perspective;
  • FIG. 7 is a schematic perspective view of the left control lever of the long-rod garden tool in FIG. 1;
  • FIG. 8 is a schematic perspective view of the left control lever of the long-rod garden tool in FIG. 7 from another perspective;
  • FIG. 9 is a schematic diagram of an internal switch assembly of the left control lever of the long-bar type garden tool in FIG. 7;
  • FIG. 10 is a schematic view of another state of the internal switch assembly of the left control lever of the long-bar type garden tool in FIG. 7;
  • FIG. 11 is a schematic diagram of a switch assembly of the long-bar type garden tool in FIG. 9;
  • FIG. 12 is an exploded schematic view of a switch assembly of the long pole garden tool in FIG. 10; FIG.
  • FIG. 13 is a schematic diagram of a trigger of the long-bar type garden tool in FIG. 12.
  • the long pole type garden tool provided in this embodiment is an electric tool, and more specifically, it may be a lawnmower.
  • a power tool generally includes components such as a motor and a housing.
  • the lawnmower 100 shown in FIGS. 1 and 2 includes a mowing mechanism, a cover 11, a connecting rod 12, an operating handle 13, and a power output portion 14.
  • the directions shown by arrows in FIG. 1 are defined as: left, right, upper, lower, front, and rear.
  • the connecting rod 12 is connected in the front-rear direction with a mowing mechanism, an operating handle 13 and a power output portion 14, wherein the mowing mechanism is connected on the front side of the connecting rod 12, the power output portion 14 is connected on the rear side of the connecting rod 12, and the connecting rod 12
  • An operation handle 13 is connected near the rear side in the front-rear direction, and the operation handle 13 is located on the front side of the power output portion 14.
  • the mowing mechanism includes a mowing head 17 or a blade 18, and the mowing head 17 is installed with a mowing rope, and the mowing rope is used for mowing, and the blade 18 is used for mowing;
  • the front side of the lever 12 is configured to protect the mowing mechanism and discharge the cuttings to the user operation position on the rear side.
  • the operation handle 13 is provided for the user to control the operation of the lawnmower 100.
  • the operation handle 13 includes a left control lever
  • a switch assembly is connected to the right control lever and the left control lever, and the switch assembly controls the switch of the lawnmower 100 to various working states.
  • the forward, backward, up, down, left, and right directions in this embodiment are referred to the directions shown in FIG. 1 and will not be described in detail below.
  • the power output unit 14 includes a first housing 15, a motor 141, and a first circuit board 142 configured to control the motor 141, wherein the first housing 15 includes a main body portion 151, and the main body portion 151 is bent around the direction of the motor to form the accommodating cavity, and the accommodating cavity is also formed with an opening that opens rearwardly.
  • the first housing 15 further includes a rear cover 152.
  • the rear cover 152 is configured to cover the opening.
  • the motor 141 and the first The circuit board 142 is disposed in the accommodating cavity.
  • the first circuit board 142 is electrically connected to the motor 141.
  • the first circuit board 142 is provided with a driving circuit configured to drive the motor 141.
  • the connecting rod 12 is a hollow tubular structure, and a rotating shaft for transmitting the rotation of the motor 141 to the mowing mechanism is provided inside.
  • the mowing mechanism is connected to an output shaft at the front end of the connecting rod 12, and the output shaft and The connection of the shaft is connected by a worm gear.
  • a heat dissipation circuit for heat dissipation is provided in this embodiment, and the heat dissipation circuit will be specifically described below.
  • the first housing 15 is symmetrically disposed with respect to a mid-plane 102.
  • the first housing 15 is divided into a left-housing portion with respect to the mid-plane 102.
  • 151a and the right case portion 151b, and the left and right case portions 151a and 151b are connected by a fastener.
  • the first casing 15 is provided with a first airflow inlet 151c and a second airflow inlet 151d that communicate the inside and the outside
  • the first casing 15 is provided with a first airflow outlet 151e and a first airflow outlet that communicate with the inside and the outside of the first casing 15 Two air flow outlets 151f.
  • the first airflow outlet 151e is formed on the left case portion 151a
  • the second airflow outlet 151f is formed on the right case portion 151b.
  • the above dual air outlet design can realize the effective operation of the entire heat dissipation circuit.
  • cold air entering from the air inlet can be quickly discharged from the nearest air outlet after passing through multiple heating components, thereby avoiding bringing hot air into the next heating component and reducing the stroke of the entire circuit; on the other hand, when After part of the air outlet is blocked, the entire heat dissipation circuit will not be blocked.
  • the heat dissipation circuit can continue to run and continue to flow through other unblocked air outlets.
  • the direction of the cooling airflow when passing through the first circuit board 142 and the extending direction of the connecting rod 12 are perpendicular to each other, and the direction of the cooling airflow when passing through the motor 141 is parallel to the extending direction of the connecting rod 12 to dissipate heat.
  • the direction of the airflow when passing through the first circuit board 142 and the direction of the heat radiation airflow when passing through the motor 141 are perpendicular to each other.
  • the above-mentioned motor 141 is a brushless motor 141.
  • the motor 141 includes a rotor shaft, and a fan is connected to the rotor shaft.
  • the operation of the motor 141 is controlled by a driving circuit provided on the first circuit board 142.
  • the lawnmower 100 further includes a second circuit board 144 configured to install electrical components such as capacitors, and the heat dissipation airflow flows through the first circuit board 142, the second circuit board 144, and Motor 141.
  • the lawnmower 100 is further provided with a heat sink 143 connected to the first circuit board 142, and the heat sink 143 is formed with an airflow channel configured to guide the airflow flowing through the circuit board in a direction perpendicular to the link 12;
  • the heat sinks 143 are evenly distributed on the upper side of the first circuit board 142.
  • the first airflow inlet 151c is located at a lower position in the up-down direction of the left housing portion 151a
  • the second airflow inlet 151d is located at an upper position in the up-down direction of the right housing portion 151b.
  • the structure needs to be adjusted. In one embodiment, it is set in a relatively empty position in the receiving cavity or is not provided.
  • the first airflow outlet 151e is formed at the middle position in the up-down direction and the rear position in the front-rear direction of the left case portion 151a
  • the second airflow outlet 151f is formed at the middle position in the up-down direction and the rear position in the front-rear direction of the right case portion 151b.
  • first airflow outlet 151e and the second airflow outlet 151f are substantially symmetrical with respect to the midplane 102.
  • first airflow outlet 151e and the second airflow outlet 151f can also be adjusted according to the specific arrangement of the electrical components in the accommodation chamber, that is, they are respectively disposed on two sides of the mid-plane 102.
  • the first circuit board 142 is located at the lower position of the first casing 15 in the up-down direction and the front position of the front-rear direction.
  • the first air inlet 151c is the main air inlet. When the heat radiation air enters the first housing through the first air inlet 151c In the receiving cavity of 15, the first circuit board 142, the heat sink 143, the second circuit board 144, and the motor 141 flow through the first circuit board 142, the heat sink 143, the second circuit board 144, and the motor 141, respectively.
  • Forming a heat dissipation circuit in one embodiment, when the second airflow outlet 151d is disposed at the rear side of the first casing 15 in the front-rear direction and the upper side in the up-down direction, the heat radiation airflow enters the accommodation cavity through the second airflow outlet 151d. Inside, the motor 141 flows through the fan, and the fan of the motor 141 sends the heat radiation airflow from the first airflow outlet 151e or the second airflow outlet 151f to form another heat radiation circuit.
  • the first housing 15 is further formed with a power interface 153, and the power interface 153 is formed as a socket for inserting a power plug.
  • the power supply interface 153 and the first circuit board 142 are respectively provided on the upper and lower sides of the motor 141, wherein the power supply interface 153 is located on the upper side of the motor 141 and the first circuit board 142 is located on the lower side of the motor 141;
  • a direction in which the rear end points to the front end is also defined as a first direction 101, and the socket is opened toward the second direction and substantially toward the front direction of the link 12, wherein the direction formed between the second direction and the first direction 101 is The included angle is greater than or equal to 0 degrees and less than 90 degrees.
  • the included angle formed between the second direction and the first direction 101 is greater than or equal to 0 degrees and less than 45 degrees.
  • the second direction and the first direction 101 are parallel to each other. Since the power interface 153 is provided in the front direction, that is, the operation handle 13 is opened, the user will not drag the power cable from the power interface due to the forward movement of the lawnmower 100 during the operation of the lawnmower 100. 153.
  • the operation handle 13 since the operation handle 13 is located near the rear side in the front-rear direction and is located on the front side of the first casing 15, when the user holds the operation handle 13 to operate the lawnmower 100, the power interface 153 is located in the user's field of vision. When the user plugs in the power cord, it can be more easily inserted in the field of view.
  • the power cord has a preset length.
  • a holder 16 is provided between the operation handle 13 and the first housing 15, and the holder 16 is provided to fix the power cord.
  • the retaining member 16 is a circle with an inner diameter slightly larger than the outer diameter of the power cord.
  • the circle is formed with a groove and has elastic force. When the power cord is caught in the circle, the gap of the circle is partially generated. The elastic deformation causes the power cord to be caught in the groove of the holder 16 and restricted to the range of the groove.
  • the holder 16 is located on the front side of the power interface 153.
  • the power cord is locked in the holder 16, so that the power cable can be effectively fixedly connected to the connecting rod 12 and does not leave the power interface 153.
  • Both the main body portion 151 and the rear cover 152 of the first housing 15 are made of a metal material, wherein the material density of the main body portion 151 is smaller than the density of the material forming the rear cover 152, so that the rear end weight can be increased and the lawnmower 100 can be guaranteed.
  • the mowing mechanism at the front end and the power output unit 14 can realize the balance of the whole machine through self-weight adjustment.
  • the metal case is also beneficial to the heat dissipation of the motor 141.
  • the left control lever of the operating handle 13 is used as a control part, and a switch assembly 19 is connected.
  • the switch assembly 19 includes a trigger 191 and a first operating member 192. And a stopper 196, wherein the trigger 191 is provided with a first end and a second end in the up-down direction, wherein the first end of the trigger 191 is located on the upper side, the second end of the trigger 191 is located on the lower side, and the first The operation surface 191a is extended from the end to the second end, and the user triggers the lawnmower 100 by pulling the trigger 191 through the operation surface 191a.
  • the first An operating member 192 can restrict the movement of the trigger 191.
  • the first operating member 192 and the trigger 191 form a movable connection that can be switched between the first position and the second position with respect to the limiting member 196; the first operating member 192 is located at the first In the position, the first operating member 192 at least partially protrudes from the operating surface 191a.
  • the first operating member 192 restricts the movement of the trigger 191.
  • the first operating member 192 allows the trigger 191 to move. .
  • a second housing 131 is provided on the upper side of the left control lever, and the second housing 131 is provided with a holding portion 132.
  • the holding portion 132 is bent to form a first portion.
  • the trigger 191 and the first operating member 192 are at least partially located in the first accommodating space and protrude from the surface of the second housing 131.
  • a second accommodating space connected to the first accommodating space is also formed on the upper side of the holding portion 132.
  • the lawnmower 100 in the embodiment further includes a second operating member 193, which is at least partially located in the second receiving space and extends to the surface of the second casing 131.
  • the trigger 191 is substantially “L” -shaped, and a first connection hole 191b is provided at a bend of the trigger 191.
  • the second housing 131 is located at a connection between the first accommodation space and the second accommodation space.
  • the second housing 131 is provided with a first connection shaft for mounting the trigger 191. As shown in FIGS.
  • the trigger 191 is mounted to the first connection shaft through the first connection hole 191b and surrounds the first center of the first connection shaft
  • the shaft 103 forms a rotational connection with the second housing 131; the operating surface 191a of the trigger 191 extends in the up-down direction, and the trigger 191 is also provided with a trigger portion 191c of the trigger switch box 194 in the front-rear direction, and the user operates the trigger 191 in the third direction
  • the trigger portion 191c abuts the trigger piece 194a of the switch box 194, and the lawnmower 100 is started; when the user releases the trigger 191, the trigger piece 194a has the elastic force to return to the initial position, and the trigger 191 is touched by the trigger piece 194a.
  • the fourth direction returns to the initial position.
  • the third direction is a counterclockwise direction
  • the fourth direction is a clockwise direction.
  • the operating surface 191a of the trigger 191 is provided with a through-hole 191d for mounting the first operating member 192.
  • the through-hole 191d extends in the front-rear direction of the trigger 191 and penetrates the trigger 191.
  • the trigger 191 is also formed in the left-right direction where the through-hole 191d is located.
  • There is a second connection hole 191e wherein the first operation member 192 is further formed with a third connection hole 192a penetrating itself, and the first operation member 192 is connected by a connection pin passing through the third connection hole 192a and the second connection hole 191e.
  • the first operating member forms a rotational connection with respect to the trigger 191 around the second central axis 104 along which the third connection hole 192a is located.
  • the connection An elastic member 195 is also provided on the pin.
  • the elastic member 195 is specifically a torsion spring.
  • the torsion spring provides a pre-tensioning force in a third direction during assembly.
  • the first operating member 192 is A preset pre-tension force of the torsion spring is pressed in the third direction during assembly, and the first operating member 192 cannot be rotated from the initial position in the third direction due to the stop of the trigger 191 itself.
  • the first operating member 192 includes an operating portion 192b and an abutting portion 192c.
  • the operating portion 192b is provided for a user to operate, so that the first operating member 192 can rotate around the second central axis 104, the abutting portion 192c abuts against the stopper 196, and has a first First position and second position.
  • the limiting member 196 is formed with a limiting groove 196a. When the abutting portion 192c is located in the limiting groove 196a, the first operating member 192 is at the first position at this time.
  • the movement of the trigger 191 is restricted; when the user pushes the first operating member 192 out of the limiting slot 196a, the first operating member 192 is now in the second position, and the user operates the trigger 191 around the first center
  • the shaft 103 moves in the third direction, the force transmitted by the trigger 191 to the first operating member 192 has deviated from the direction of the connecting line between the second central shaft 104 and the abutting portion 192c.
  • the first operating member 192 can be overcome by the action of the trigger 191
  • the elastic force of the elastic member 195 extends along the first Turning in the direction, the trigger 191 itself can also move in the third direction around the first central axis 103, thereby triggering the switch box 194 and the lawnmower 100 is started; when the user disengages the trigger 191, the trigger 191 is resisted by the trigger 194a along the fourth The direction returns to the initial position, and the first operating member 192 also returns to the initial position under the action of the elastic force of the elastic member 195.
  • the operation portion 192b of the first elastic member 195 is designed to be a streamlined structure suitable for the user's tiger mouth engagement. That is, when the user operates the first operation member 192, the user can hold the trigger 191 and resist the first operation through the tiger mouth. The member 192 rotates in the fourth direction, so as to leave the first position, and continues to rotate through the tiger's mouth against the first operating member 192 when the first operating member 192 enters the second position.
  • a storage groove 191f configured to receive the operation portion 192b is formed in the upper and lower directions.
  • the abutting portion 192c of the first operating member 192 is further formed with a protruding portion 192d near the first end of the trigger.
  • the first elastic member 195 is rotated in the fourth direction by the user or in the third direction during the automatic reset process. At this time, the abutting portion 192c will always abut the stopper 196.
  • the abutting portion 192c Under a long-term effect, the abutting portion 192c will not be able to be restrained in the stopper groove 196a due to severe wear. At this time, the stopper effect of the first operating member 192 will fail. The user can easily trigger the trigger box 191 without operating the first operating member 192 to trigger the switch box 194.
  • the abrasion of the abutting portion 192c can be offset, so that the abutting portion 192c of the first operation is operated for a long time and After abrasion occurs, it can be restricted within the limiting groove 196a, so that the limiting effect of the first operating member 192 continues to be effective.
  • the second operating member 193 in this embodiment can limit the movement of the trigger 191, and the second operating member 193 can switch between the third position and the fourth position relative to the trigger 191.
  • the first The two operating members 193 limit the movement of the trigger 191; when the second operating member 193 is in the fourth position, the second operating member 193 allows the trigger 191 to move.
  • the second operation member 193 is located at the trigger portion 191c of the trigger 191.
  • the second operation member 193 includes a second operation portion 193a and a second stop portion 193b.
  • the second operation portion 193a is located at the second casing 131.
  • the outer surface can be switched between the third position and the fourth position.
  • the second stop portion 193b stops the trigger portion 191c of the trigger 191 in the third direction, and the trigger portion 191c
  • the switch box 194 cannot be triggered.
  • the second stop portion 193b is disengaged from the trigger portion 191c of the trigger 191, and the trigger 191 can be rotated in the third direction.
  • the trigger portion 191c can trigger the switch box 194.
  • the lawnmower 100 may be activated.
  • the power tool realizes the rapid outflow of the cooling airflow by setting the first airflow outlet 151e and the second airflow outlet 151f, increasing the flow rate of the cooling airflow, and realizing the effective use of the cooling airflow through the reasonable arrangement of the positions of the first circuit board 142 and the motor 141, thereby Improve heat dissipation efficiency.

Abstract

一种长杆类园林工具，包括：割草机构，设置为割草；动力输出部(14)，位于所述割草机构的一端，所述动力输出部(14)包括电机(141)及第一壳体(15)，所述第一壳体(15)还设有电源接口(153)，所述电源接口(153)为供电源插头插入的插口，所述第一壳体(15)设有容纳腔，所述电机(141)设置于所述容纳腔内；设置于所述容纳腔内的至少一个电子组件；及连杆(12)，沿第一方向(101)连接所述割草机构和所述动力输出部(14)；其中，所述插口朝向第二方向敞开，所述第二方向与第一方向(101)之间所形成的夹角大于等于0度且小于90度，所述第一方向(101)为所述动力输出部(14)指向割草机构的方向。

Description

长杆类园林工具
本申请要求申请日为2018年6月28日、申请号为201810683072.9；申请日为2018年6月28日、申请号为201821015752.5及申请日为2018年6月28日、申请号为201821015812.3的中国专利申请的优先权，上述申请的全部内容通过引用结合在本申请中。
技术领域
本公开属于园林工具技术领域，例如涉及一种长杆类园林工具。
背景技术
相关技术中长杆类园林工具包括两种，其中一种采用交流电电动机的长杆类园林工具，该长杆类园林工具通过电源线直接外接交流电，由于户外作业时，电源线较长，因此户外作业不方便；另外一种采用单独电池包的长杆类园林工具，由于电池包的容量小，续航能力差，因此户外工作时间短。因此，在单独电池包的基础上，出现了采用背负式电池包的长杆类园林工具。由于背负式电池包由操作者背在身上，而长杆类园林工具主体本身不包括电池包，只是通过电源线将长杆类园林工具与背负式电池包电性连接，因此背负式电池包的容量可以很大，进一步延长长杆类园林工具作业时间。
相关技术中的园林工具，该园林工具包括电动机，电动机固定连接在不锈钢管尾端，且电动机上部设有控制开关和电源线插口。因此操作者在插拔电源线时，需要扭转身体，手臂抬起，拔取插头。操作者的扭转姿态和手臂抬起增加了人体的劳动负担。
发明内容
本公开提供了一种长杆类园林工具，能够使得用户可以较为简便的插接电源线。
一种长杆类园林工具，包括：割草机构，设置为割草；动力输出部，位于所述割草机构的一端，所述动力输出部包括电机及第一壳体，所述第一壳体还设有电源接口，所述电源接口为供电源插头插入的插口，所述第一壳体设有容 纳腔，所述电机设置于所述容纳腔内；设置于所述容纳腔内的至少一个电子组件；及连杆，沿第一方向连接所述割草机构和所述动力输出部；其中，所述插口朝向第二方向敞开，所述第二方向与第一方向之间所形成的夹角大于等于0度且小于90度，所述第一方向为所述动力输出部指向割草机构的方向。
附图说明
图1是一实施例提供的长杆类园林工具安装打草头的立体示例图；
图2是一实施例提供的长杆类园林工具安装刀片的立体示例图；
图3是图1中的长杆类园林工具的动力输出部的剖视图；
图4是图1中的长杆类园林工具的动力输出部的另一个视角的剖视图；
图5是图1中的长杆类园林工具的动力输出部的立体示意图；
图6是图1中的长杆类园林工具的动力输出部的另一个视角的立体示意图；
图7是图1中的长杆类园林工具的左控制杆的立体示意图；
图8是图7中的长杆类园林工具的左控制杆的另一视角的立体示意图；
图9是图7中的长杆类园林工具的左控制杆的内部开关组件的示意图；
图10是图7中的长杆类园林工具的左控制杆的内部开关组件的另一状态的示意图；
图11是图9中的长杆类园林工具的开关组件的示意图；
图12是图10中的长杆类园林工具的开关组件的分解示意图；
图13是图12中的长杆类园林工具的扳机的示意图。
具体实施方式
本实施例提供的长杆类园林工具为电动工具，更具体的可以为打草机。电动工具一般包括电机及壳体等组件，图1至图2所示的打草机100，包括：割草机构，护罩11、连杆12、操作把手13和动力输出部14。为了方便说明本申请的技术方案，定义了图1中箭头所示的方向分别为：左侧、右侧、上侧、下侧、前侧和后侧。连杆12在前后方向上连接有割草机构、操作把手13和动力输出部14，其中，割草机构连接在连杆12前侧，动力输出部14连接在连杆12后侧，连杆12沿前后方向靠近后侧位置连接有操作把手13，操作把手13位于动力输出部14的前侧。割草机构包括打草头17或刀片18，打草头17安装打草绳，所述打草绳用于打草，刀片18用于割草；护罩11至少围绕上述割草机构安装至连杆12前侧， 设置为防护割草机构并将草屑排出至后侧用户操作位置；操作把手13供用户操作以控制打草机100工作，在一实施例中，操作把手13包括左控制杆和右控制杆，左控制杆作为控制部分，连接有开关组件，开关组件控制打草机100的切换至多种工作状态。本实施例中的前、后、上、下、左及右方向参考图1中所示的方向，以下不再赘述。
如图3和图4所示，动力输出部14包括第一壳体15、电机141和设置为控制电机141的第一电路板142，其中，第一壳体15包括一个主体部151，主体部151围绕电机的方向弯折形成所述容纳腔，容纳腔还形成有向后敞开的开口，第一壳体15还包括一个后盖152，后盖152设置为覆盖上述开口，电机141和第一电路板142设置在容纳腔内，第一电路板142与电机141电性连接，第一电路板142上设有设置为驱动电机141的驱动电路。
连杆12为中空的管状结构，内部设置有用于设置为将电机141的转动传递至割草机构的转轴，在一实施例中，割草机构连接至连杆12前端的输出轴，输出轴与转轴的连接处通过蜗轮连接，以上布置实现了电机141的后置，避免电机141直接设置于割草机构内时，因为碰撞或其他不当操作造成损坏；同时，通过上述设置，可以实现对电机141的合理养护，针对电机141控制及发热问题能够有效控制。
为实现对上述容纳腔内电机141和第一电路板142等电气组件的有效散热，本实施例提供了一种可供散热的散热回路，以下就该散热回路做具体介绍。
如图4至图6所示，第一壳体15关于一个中分面102对称设置，在如图1所示的左右方向上，第一壳体15相对中分面102分为左壳体部151a和右壳体部151b，左壳体部151a和右壳体部151b通过紧固件连接。第一壳体15上设有连通内部和外部的第一气流入口151c和第二气流入口151d，第一壳体15上设有连通第一壳体15内部和外部的第一气流出口151e和第二气流出口151f。在一实施例中，第一气流出口151e形成于左壳体部151a上，第二气流出口151f形成于右壳体部151b上。上述双出风口设计可以实现整个散热回路的有效运作。一方面，从进风口进入的冷风在穿过多个发热部件后，可以从最近的出风口迅速排出，从而避免将热风带入下一个发热部件，减少了整个回路的行程；另一方面，当部分出风口阻塞后，不至于出现整个散热回路不畅的情况，散热回路可以继续运行，并通过其他未阻塞的出风口继续流通。
在一实施例中，散热气流在流经第一电路板142时的方向与连杆12的延伸方 向相互垂直，散热气流在流经电机141时的方向与连杆12的延伸方向相互平行，散热气流在流经第一电路板142时的方向与散热气流在流经电机141时的方向相互垂直。通过以上布置，可以有效地优化容纳腔内的排布空间，同时，可以增加气流与第一电路板142和电机141的接触空间和接触时间，实现散热效果的进一步优化。
在本实施例中，上述电机141为无刷电机141，电机141包括转子轴，转子轴连接有风扇，通过第一电路板142上设置的驱动电路控制电机141的运行。在一实施例中，打草机100还包括第二电路板144，所述第二电路板144设置为安装电容等电气组件，散热气流依次流经第一电路板142、第二电路板144和电机141。为进一步增加散热效率，打草机100还设置有与第一电路板142连接的散热片143，散热片143形成有设置为导向气流沿垂直于连杆12的方向流经电路板的气流通道；在一实施例中，散热片143均匀分布于第一电路板142的上侧。
在一实施例中，第一气流入口151c位于左壳体部151a上下方向的下部位置上，第二气流入口151d位于右壳体部151b上下方向的上部位置上，其中第二气流入口151d可以根据结构需要做调整，在一实施例中，设置在容纳腔内较空旷的位置或者不设置。第一气流出口151e形成于左壳体部151a上下方向的中部位置及前后方向的后部位置上，第二气流出口151f形成于右壳体部151b上下方向的中部位置及前后方向的后部位置上，第一气流出口151e和第二气流出口151f关于中分面102基本对称。在一实施例中，第一气流出口151e和第二气流出口151f还可以根据容纳腔内电气组件的具体排布方式做调整，即分别设置在中分面102的两侧。
第一电路板142位于第一壳体15上下方向的下部位置及前后方向的前部位置，其中第一气流入口151c为主进风口，当散热气流通过第一气流入口151c进入至第一壳体15的容纳腔内时，分别流经第一电路板142、散热片143、第二电路板144及电机141，电机141的风扇将散热气流从第一气流出口151e或第二气流出口151f送出，形成一个散热回路；在一实施例中，当第二气流出口151d设置在第一壳体15的前后方向的后侧及上下方向的上侧时，散热气流通过第二气流出口151d进入至容纳腔内，流经电机141，电机141的风扇将散热气流从第一气流出口151e或第二气流出口151f送出，形成另一个散热回路。
为了提供能源给电机141，第一壳体15还形成有电源接口153，电源接口153形成设置为供电源插头插入的插口。在上下方向上，电源接口153和第一电路板 142分别设置于电机141的上下两侧，其中，电源接口153位于电机141的上侧，第一电路板142位于电机141的下侧；在本实施例中，还将后端指向前端的方向定义为第一方向101，插口朝向第二方向敞开并基本朝向连杆12的前侧方向，其中，第二方向与第一方向101之间所形成的夹角大于等于0度且小于90度，为更加方便用户操作，在一实施例中，第二方向与第一方向101之间所形成的夹角大于等于0度且小于45度，在其他实施例中，第二方向与第一方向101相互平行。由于电源接口153朝向前侧方向设置，即朝向所述操作把手13敞开，用户在操作打草机100过程中，不会因为打草机100向前运动而拖拽电源线导致电源线脱离电源接口153。此外，由于操作把手13位于前后方向靠近后侧位置，且位于第一壳体15前侧，故用户在握持操作把手13操作打草机100时，上述电源接口153位于用户的视野范围内，当用户插接电源线时，可以在视野范围内更简便的插入。
电源线具有预设的长度，电池包与电机141电性连接时，如果电源线不被固定，电源线处于自由状态，容易造成电线缠绕等安全隐患。因此，在操作把手13和第一壳体15之间设置了保持件16，该保持件16设置为固定电源线。在一实施例中，保持件16为内径略大于电源线外径的圆缺，该圆缺形成一个凹槽，并具有弹性力，电源线卡入圆缺内时，圆缺的缺口会产生局部弹性变形，使得电源线卡入保持件16的凹槽中并被限制在凹槽的范围内。保持件16位于电源接口153的前侧，用户操作时，电源线卡在保持件16中，可以实现电源线有效固定连接至连杆12并不会脱离电源接口153。第一壳体15的主体部151和后盖152均采用金属材料制成，其中，主体部151的材料密度小于形成后盖152的材料的密度，从而可以增加后端重量，保证打草机100前端的割草机构能与动力输出部14通过自身配重调整实现整机的平衡。此外，相比于塑料壳体，金属壳体也有利于电机141散热。
为实现对打草机100的有效控制，如图7至图13所示，操作把手13的左控制杆作为控制部分，连接有开关组件19，开关组件19包括：扳机191、第一操作件192及限位件196，其中，扳机191沿上下方向设有第一端和第二端，其中，扳机191的第一端位于上侧，扳机191的第二端位于下侧，扳机191的第一端向第二端延伸形成一个操作面191a，用户通过操作面191a扳动扳机191启动打草机100，为了符合安全要求，避免用户在不知情或其他情况下误操作，本实施例设置的第一操作件192可以限制扳机191的运动，第一操作件192与扳机191构成能相对限位件196在第一位置和第二位置之间切换的活动连接；在第一操作件192位于 第一位置时，第一操作件192至少部分凸出于操作面191a，第一操作件192限制扳机191的运动；在第一操作件192位于第二位置时，第一操作件192允许扳机191的运动。
在一实施例中，如图7和图8所示，左控制杆上侧位置设有第二壳体131，第二壳体131设有一个握持部132，握持部132弯曲形成有第一容纳空间，扳机191和第一操作件192至少部分位于第一容纳空间内并突出第二壳体131表面，在握持部132上侧还形成有连接第一容纳空间的第二容纳空间，本实施例中的打草机100还包括第二操作件193，所述第二操作件193至少部分位于第二容纳空间内并延伸至第二壳体131表面。在一实施例中，扳机191基本呈“L”形，在扳机191的弯折处设有第一连接孔191b，第二壳体131位于第一容纳空间和第二容纳空间的连接处，第二壳体131设有安装扳机191的第一连接轴，如图12和图13所示，扳机191通过第一连接孔191b安装至第一连接轴处，并围绕第一连接轴的第一中心轴103相对第二壳体131构成转动连接；扳机191的操作面191a沿上下方向延伸，扳机191在前后方向上，还设有触发开关盒194的触发部191c，用户操作扳机191沿第三方向转动时，触发部191c抵触开关盒194的触发件194a，打草机100被启动；当用户释放扳机191时，触发件194a因为具有恢复至初始位置的弹性力，扳机191被触发件194a抵触沿第四方向恢复至初始位置。本实施例中，第三方向为逆时针方向，第四方向为顺时针方向，本领域的技术人员也可以将上述第三方向、第四方向作相反的理解。
在扳机191的操作面191a上设有安装第一操作件192的通孔191d，通孔191d沿扳机191的前后方向延伸并贯穿扳机191，扳机191位于通孔191d所在位置的左右方向上还形成有第二连接孔191e，其中，第一操作件192还形成有贯穿自身的第三连接孔192a，通过穿过第三连接孔192a和第二连接孔191e的连接销将第一操作件192连接至扳机191，第一操作件围绕沿第三连接孔192a所在的第二中心轴104相对扳机191构成转动的连接，如图11所示，在将第一操作件192装配至扳机191时，连接销上还设置有一个弹性件195，该弹性件195具体为一个扭簧，该扭簧在装配时，提供一个沿第三方向的预紧力，其中，第一操作件192在初始位置时被扭簧在装配时预设的预紧力沿第三方向抵压，而第一操作件192由于扳机191本身的止挡，无法脱离初始位置沿第三方向转动。
第一操作件192包括：操作部192b及抵触部192c，操作部192b供用户操作，使得第一操作件192能围绕第二中心轴104旋转，抵触部192c抵触至限位件196， 并具有第一位置和第二位置。在一实施例中，如图9-图12所示，限位件196形成有一个限位槽196a，当抵触部192c位于限位槽196a内时，此时第一操作件192处于第一位置，用户操作扳机191围绕第一中心轴103沿第三方向运动时，通过连接销向第一操作件192传递了一个如图1所示方向的向后的力，此时力的方向基本平行或位于第二中心轴104与抵触部192c的连接线方向，即力的方向基本沿第一操作件192转动的半径方向，此时的力无法推动第一操作件192转动，第一操作件192被限制在限位槽196a内，扳机191的运动被限制；当用户推动第一操作件192脱离限位槽196a时，此时第一操作件192处于第二位置，用户操作扳机191围绕第一中心轴103沿第三方向运动时，扳机191传递给第一操作件192的力已经偏离了第二中心轴104与抵触部192c的连接线方向，第一操作件192可以在扳机191的作用下克服弹性件195的弹性力并沿第四方向转动，扳机191本身也可以围绕第一中心轴103沿第三方向运动，从而触发开关盒194，打草机100被启动；当用户脱离扳机191时，扳机191被触发件194a抵触沿第四方向恢复至初始位置，第一操作件192也在弹性件195的弹性力作用下恢复至初始位置。
在一实施例中，第一弹性件195的操作部192b设计成适合用户虎口卡合的流线型结构，即用户在操作第一操作件192时，可以通过握持扳机191并通过虎口抵触第一操作件192沿第四方向转动，从而脱离第一位置，并在第一操作件192进入第二位置时继续通过虎口抵触第一操作件192继续转动，在一实施例中，扳机191的通孔191d内沿上下方向延伸形成有设置为容纳操作部192b的容纳槽191f，当第一操作件192沿第四方向转动至极限位置时，可以完全容纳至容纳槽191f内，此时第一操作件192完全嵌入容纳槽191f内，方便用户直接握持扳机191，避免长期工作时用户虎口抵触第一操作件192带来的疲劳感。第一操作件192的抵触部192c靠近扳机第一端还形成有一个凸起部192d，其中，第一弹性件195在被用户操作沿第四方向转动或者在自动复位过程中沿第三方向转动时，抵触部192c会始终紧贴限位件196，长期作用下，抵触部192c会因为磨损严重而无法被限位在限位槽196a中，此时第一操作件192的限位作用将失效，用户可以轻易扳动扳机191而不需要操作第一操作件192而触发开关盒194，通过设置凸起部192d可以抵消抵触部192c自身的磨损，使得第一操作的抵触部192c在长期操作并产生磨损后还能够被限制在限位槽196a内，使得第一操作件192的限位作用继续有效。
本实施例中的第二操作件193能够限制扳机191运动，第二操作件193相对扳 机191能在第三位置和第四位置之间切换，在第二操作件193位于第三位置时，第二操作件193限制扳机191的运动；在第二操作件193位于第四位置时，第二操作件193允许扳机191的运动。
在一实施例中，第二操作件193位于扳机191的触发部191c位置，第二操作件193包括第二操作部193a和第二止挡部193b，第二操作部193a位于第二壳体131的外表面，能在第三位置和第四位置切换，当第二操作部193a位于第三位置时，第二止挡部193b止挡扳机191的触发部191c沿第三方向转动，触发部191c无法触发开关盒194，当第二操作部193a位于第四位置时，第二止挡部193b脱离扳机191的触发部191c，扳机191能沿第三方向转动，触发部191c可以触发开关盒194，打草机100可以被启动。
电动工具通过设置第一气流出口151e和第二气流出口151f实现散热气流的快速流出，增加散热气流的流速，并通过第一电路板142及电机141位置的合理布置实现散热气流的有效利用，从而改善散热效率。

Claims (20)

  1. 一种长杆类园林工具，包括：
    割草机构，设置为割草；
    动力输出部，位于所述割草机构的一端，所述动力输出部包括电机及第一壳体，所述第一壳体还设有电源接口，所述电源接口为供电源插头插入的插口，所述第一壳体设有容纳腔，所述电机设置于所述容纳腔内；
    设置于所述容纳腔内的至少一个电子组件；及
    连杆，沿第一方向连接所述割草机构和所述动力输出部；
    其中，所述插口朝向第二方向敞开，所述第二方向与第一方向之间所形成的夹角大于等于0度且小于90度，所述第一方向为所述动力输出部指向割草机构的方向。
  2. 根据权利要求1所述的长杆类园林工具，其中，所述第二方向与所述第一方向之间所形成的夹角大于等于0度且小于45度。
  3. 根据权利要求1所述的长杆类园林工具，其中，所述第二方向与所述第一方向相互平行。
  4. 根据权利要求1所述的长杆类园林工具，其中，所述第一壳体包括主体部及后盖，所述容纳腔设置为由所述主体部沿围绕所述电机的方向弯折形成，所述容纳腔设有敞开的开口；所述后盖设置为覆盖所述开口。
  5. 根据权利要求1所述的长杆类园林工具，还包括：操作把手，所述操作把手设置为供用户操作，所述操作把手和所述电源接口设置于所述连杆的一侧。
  6. 根据权利要求1所述的长杆类园林工具，其中，所述第一壳体上设有连通所述第一壳体的内部和外部的第一气流入口、第一气流出口及第二气流出口；
    所述园林工具还包括第一电路板，所述第一电路板与所述电机电性连接；
    其中，所述容纳腔设置为分别连通所述第一气流入口、第一气流出口及第二气流出口，使自所述第一气流入口进入所述容纳腔内的散热气流依次流经所述第一电路板和所述电机后一部分从所述第一气流出口流出，另外一部分从所述第二气流出口流出。
  7. 根据权利要求6所述的长杆类园林工具，其中，所述第一壳体设置为关于一个中分面对称设置，所述第一气流出口和所述第二气流出口分别设置在所述中分面的两侧。
  8. 根据权利要求6所述的长杆类园林工具，其中，所述散热气流在流经所述第一电路板时的方向与所述散热气流在流经所述电机时的方向相互垂直。
  9. 根据权利要求6所述的长杆类园林工具，其中，所述第一电路板上设有驱动电路，所述驱动电路设置为驱动所述电机的驱动电路；
    所述长杆类园林工具还包括：第二电路板及电容，所述电路板设置为安装所述电容，所述第一电路板、第二电路板和所述电机设置为沿所述散热气流流经方向依次分布。
  10. 根据权利要求6所述的长杆类园林工具，其中，所述电机设有一个输出轴，所述输出轴的延伸方向与所述散热气流在流经所述第一电路板时的方向相互垂直。
  11. 根据权利要求10所述的长杆类园林工具，其中，所述输出轴的延伸方向与所述散热气流在流经所述电机时的方向相互平行。
  12. 根据权利要求10所述的长杆类园林工具，还包括散热片，所述散热片与所述第一电路板连接，所述散热片上设有气流通道，所述气流通道设置为使所述散热气流沿垂直于所述输出轴的方向流经所述第一电路板。
  13. 根据权利要求1所述的长杆类园林工具，其中，操作把手包括：开关组件，设置为控制所述电机的启动和停止，所述开关组件包括：
    扳机，设有一个操作面；及
    第一操作件，所述第一操作件具有第一位置和第二位置，且设置为与所述扳机构成能在所述第一位置和所述第二位置之间切换的活动连接；
    所述第一操作件设置为位于所述第一位置时，至少部分凸出于所述操作面并限制所述扳机的运动；所述第一操作件还设置为位于所述第二位置时，所述扳机可运动。
  14. 根据权利要求13所述的长杆类园林工具，其中，所述操作面设有一个通孔，所述通孔设置为容纳至少部分所述第一操作件，所述第一操作件设置为至少部分穿过所述通孔并能相对所述扳机在所述通孔内转动。
  15. 根据权利要求13所述的长杆类园林工具，其中，所述第一操作件包括可供操作的操作部和可供限位的抵触部。
  16. 根据权利要求15所述的长杆类园林工具，其中，所述操作面还设有容纳所述操作部的容纳槽。
  17. 根据权利要求13所述的长杆类园林工具，其中，所述开关组件还包括止挡件，所述止挡件设有限位槽，所述第一操作件相对所述限位槽在所述第一位置和所述第二位置之间切换。
  18. 根据权利要求13所述的长杆类园林工具，其中，所述扳机设有第一端和第二端，所述操作面设置为由所述第一端向所述第二端延伸形成，所述第一操作件设有凸起部，所述凸起部靠近所述扳机的第一端设置。
  19. 根据权利要求13所述的长杆类园林工具，其中，所述开关组件还包括第二操作件，所述第二操作件设有可相对所述扳机切换的第三位置和第四位置，所述第二操作件设置为位于所述第三位置时，限制所述扳机的运动；所述第二操作件还设置为位于所述第四位置时，所述扳机可运动。
  20. 根据权利要求19所述的长杆类园林工具，其中，所述第二操作件设有可供操作的第二操作部和可供限位的第二止挡部。
PCT/CN2019/093783 2018-06-28 2019-06-28 长杆类园林工具 WO2020001634A1 (zh)

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