CN104604548A - Electric gardening tool - Google Patents
Electric gardening tool Download PDFInfo
- Publication number
- CN104604548A CN104604548A CN201310543221.9A CN201310543221A CN104604548A CN 104604548 A CN104604548 A CN 104604548A CN 201310543221 A CN201310543221 A CN 201310543221A CN 104604548 A CN104604548 A CN 104604548A
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- CN
- China
- Prior art keywords
- brake
- electric
- garden tool
- control piece
- brushless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- A01G3/08—Other tools for pruning, branching or delimbing standing trees
- A01G3/085—Motor-driven saws for pruning or branching
- A01G3/086—Chain saws
Abstract
The invention provides an electric garden tool, which comprises a shell, a brushless motor arranged in the shell and a working component driven by the brushless motor, and is characterized in that: the electric garden tool further comprises an electronic brake for electronically braking the brushless motor, a mechanical brake for mechanically braking the brushless motor, and a brake control member for controlling the electronic brake and the mechanical brake. The electric garden tool adopts an electromechanical combined brake structure, can be adopted on high-speed or low-speed electric garden tools, can meet the requirement of brake time, has stable brake performance and long brake service life, and meets the requirement of a user.
Description
Technical field
The present invention relates to a kind of electric tool, particularly a kind of electric garden tool.
Background technology
Current electric tool is widely used in the field such as family, gardens, and brushless electric machine is more and more applied in electric tool, to meet the use needs of user to energy-efficient electric tool due to the feature that its moment is large, power is high.Especially electric garden tool, as chain saw, chain saw is the garden instrument that a kind of L shape blade transverse movement by power set drive saw chain interlocks carries out cutting timber or branch.Chain saw is when normal operating, when sawtooth card is in sawed object, the lasting rotation of motor can cause the upwards swing of chain saw, and namely chain saw is recoiled towards the direction reversing of user's face, accidents caused, therefore need to brake in time when causing danger situation to stop chain to move.
The brake that brushless chain saw in the market adopts mainly contains two kinds: mechanical brake and electric brake, and usual mechanical brake is used for the higher chain saw of rotating speed, and electric brake is used for rotating speed chain saw on the low side.Traditional mechanical brake, complex structure, usual needs arrange a brake ribbon and coordinate with the brake hubs be installed on motor transmission shaft and brake on housing, thereby increase product weight, simultaneously simple mechanical brake is when chain saw recoils, only act on motor transmission shaft by braking element, because saw body still has larger rotator inertia, still likely have an accident with the face of user or other body contact, be no matter braking time or service life equal less stable, and electric brake is mainly used in rotating speed chain saw on the low side, when on the chain saw for higher rotation speed, simple electric brake does not often reach requirement in braking time, therefore above two kinds of brake modes all have some limitations.
Summary of the invention
The object of the present invention is to provide a kind of can Quick brake and the stable electric garden tool of braking quality.
For reaching above-mentioned purpose, the invention provides a kind of electric garden tool, comprise a housing, one is installed to the brushless electric machine in housing, a workpiece driven by described brushless electric machine, it is characterized in that: described electric garden tool also comprise an electric brake by electronics mode brushless motor, one mechanically the mechanical brake of brushless motor and one for controlling the brake control piece of described electric brake and mechanical brake.
Further, by primary importance, the second place that described electric brake is opened and the 3rd position that described mechanical brake is opened that a setting element is spacing when described brake control piece comprises a machine normal operating.
Further, by the primary importance that a setting element is spacing when described brake control piece comprises a machine normal operating, the second place that described electric brake and mechanical brake are opened simultaneously.
Further, described electric brake comprises a braking circuit and one and is triggered by brake control piece and directly can control the brake switch of braking circuit break-make.
Further, described braking circuit is arranged on an electronic controller be arranged in housing, described electronic controller is electrically connected with described brushless electric machine, described electric garden tool also has a switch trigger and a main switch controlled by described switch trigger, and described main switch and described brake switch are connected with electronic controller and formed an operating circuit.
Further, described brake control piece one end forms one can for the operating portion of brake operation, the other end form that a relative housing swings outstanding go out arm, describedly hang arm and form a groove in the part coordinated with described brake switch, described brake switch has a switch rocker be installed in groove, and described switch rocker swings along with the rotary motion of hanging arm.
Further, described brake switch comprises two kinds of on-states, is respectively to disconnect the first on-state that described braking circuit connects operating circuit simultaneously, and connects the second on-state that described braking circuit disconnects described operating circuit simultaneously.
Further, described brushless electric machine is Three-phase electronic commutating machine, and its short circuit is also produced the opposing torque of the described brushless electric machine of braking by described braking circuit applying controlled resistor or conductive line traverses wherein two phase coils.
Further, described mechanical brake comprises a brake block be connected with described brake control piece, and described brake block is made up of a kind of metal material or elastomeric material.
Further, described brushless electric machine is outer rotor brushless motor, and described brake block comprises a primary importance away from brushless electric machine, and one is driven into the second place of rotor outer surface of the brushless electric machine rotated that can rub by brake control piece.
Further, described brake block comprises a primary importance away from brushless electric machine, and one is driven into the second place of the brushless electric machine output shaft outer surface rotated that can rub by brake control piece.
Further, described electric garden tool also comprises a gear-driven assembly be connected with brushless electric machine, described gear-driven assembly has an output shaft, described brake block comprises a primary importance away from described gear-driven assembly, and one is driven into the second place of the output shaft outer surface of the described gear-driven assembly that can rub by brake control piece.
Further, described brushless electric machine being provided with can with the friction hub being connected to the brake block braked on control piece and directly contacting.
Further, described electric garden tool is chain saw, and described workpiece is a saw chain driven by described brushless electric machine, and described brake control piece is a brake baffle plate that can rotate relative to housing.
Electric garden tool of the present invention adopts the brake structure of electric-mechanic control system, no matter all can adopt at a high speed or on low-speed electronic garden instrument, the requirement of braking time can be met, braking quality is stablized simultaneously, the brake life-span is also longer, adopt the chain saw braking time of this brake structure to stablize, brake is reliable, meets the needs of user.
Accompanying drawing explanation
Fig. 1 is the integrally-built stereogram of the electric garden tool in embodiment of the present invention;
Fig. 2 is the partial sectional view of the electric garden tool in embodiment of the present invention;
Fig. 3 is the electric brake schematic diagram of the electric garden tool in embodiment of the present invention
The brake control piece of the electric garden tool in Fig. 4 embodiment of the present invention is positioned at cutaway view during primary importance;
Fig. 5 is the cutaway view of the electric garden tool brake control piece in embodiment of the present invention when being positioned at the second place.
Embodiment
Refer to Fig. 1, in embodiments of the present invention, electric garden tool 10 is chain saw, and it comprises housing 11, front handlebar 12 and the main handle 13 be arranged on housing 11, be arranged on the switch trigger 14 on main handle 13 and the workpiece 15 for realizing concrete function.Workpiece 15 comprises guide plate 16 and saw chain 17, wherein saw chain 17 is looped around guide plate 16 edge and cyclically can guides along guide plate 16 under the driving of driving mechanism (not shown), guide plate 16 one end is supported on housing 11, and the other end extends housing 11 along housing 11 longitudinally.In addition, automatic lubricating system (not shown) and power brick 18 is also comprised in housing 11, for those of ordinary skills, the concrete structures such as front handlebar 12, main handle 13, workpiece 15, driving mechanism and lubricating system all belong to common practise, are not described in detail here.Be understandable that, dynamo-electric brake structure of the present invention also can be applied in the electric garden tool of other application brushless electric machines drivings, as pruner, mower, mower etc. need the anxious electric garden tool stopped.
Refer to Fig. 2, Fig. 2 is the cutaway view of the electric garden tool 10 removing guide plate 16, saw chain 17 and power brick 18 in embodiment of the present invention, brushless electric machine 19, the main switch controlled by switch trigger 14 20 for driving saw chain 17 to move is provided with, open and close when main switch 20 normally uses for control machine in housing 11.Electric garden tool 10 also comprises one and is arranged on electronic controller 21, the control piece 22 that brakes be connected with brushless electric machine 19 in housing 11, here brake control piece 22 is brake baffle plates, and can rotate relative to housing 11 around fulcrum O, be understandable that, also brake control piece 22 can be needed to be arranged to a button form according to actual design, button press when needing to brake.Electric garden tool 10 also comprises an electric brake controlled by brake control piece 22, electric brake comprises a brake switch 23, wherein main switch 20, brake switch 23 and electronic controller 21 operating circuit in series, only have when main switch 20 is in a kind of on-state with brake switch 23 simultaneously, machine could start and normally works.Electric brake also comprises a braking circuit controlled by brake switch 23, for the disconnection of the anxious stopping time operating circuit that controls to brake, controls the unlatching of braking circuit to carry out electric brake simultaneously.Above-mentioned braking circuit is arranged in electronic controller 21; electronic controller 21 is connected with brushless electric machine 19; and the circuit state of whole machine can be controlled; realize various electric function; if soft starter for motor, battery protection are to avoid excess temperature, overcurrent etc., the action of all switches is also all operate brushless electric machine 19 after the analysis by electronic controller 21.
Refer to Fig. 3, for the electric brake schematic diagram of embodiments of the present invention, the brushless electric machine 19 that wherein electric garden tool 10 adopts is Three-phase electronic commutating machine, it has three coil windings A, B, C, the brake switch 23 be attached thereto has 6 contacts, the operation principle of braking circuit is as follows: when brake control piece 22 does not start, brake switch 23 is in the first on-state illustrated, contact 2 wherein on brake switch 23 is connected with contact 3, contact 5 and contact 6 are connected, now three loop A of brushless electric machine 19, B, C is in on-state, as long as now the main switch 20 of connecting with it is opened, namely operating circuit is switched on, machine can be unlocked, when the control piece 22 that brakes starts, brake switch 23 is positioned at the second on-state (not shown), now contact 1 and contact 2 are connected, contact 4 and contact 5 are connected, owing to connecting a wire between contact 1 and contact 4, therefore loop A, B disconnects, operating circuit disconnects, and brushless electric machine 19 is alternate to be shorted, now be equivalent to connect a negater circuit, rotor 191 is due to inertia continuation High Rotation Speed, now can produce the magnetic force contrary with its free-wheel direction, i.e. opposing torque, stop the free-wheel brushless motor 19 of rotor 191, thus realize the Quick brake braking of electric garden tool 10, be understandable that and also can connect between contact 1 with contact 4 that resistance is same can be served the same role.Brushless electric machine 19 in the embodiment of the present invention is direct current outer rotor brushless motors, can certainly adopt inner-rotor-type, powers to brushless electric machine 19 by a power brick 18.Be understandable that, also can need configuration AC brushless electric machine (not shown) according to different, now the input of power supply can direct incoming transport power supply.
Please again consult Fig. 2, formed in control piece 22 one end of braking one can for operator face a danger situation time carry out the operating portion 221 of brake operation, the other end formed one can relative to housing 11 rotate outstanding go out arm 222, describedly hang arm 222 in the part coordinated with described brake switch 23, be formed with a groove (scheming not mark), described brake switch 23 has a switch rocker 231 be installed in groove, switch rocker 231 swings and then controls the on-state of brake switch 23 along with the rotary motion of hanging arm 222, because brake switch 23 has two kinds of on-states, different on-states can realize the switching of operating circuit and braking circuit, when being in the first on-state, described braking circuit disconnects, described operating circuit is connected, machine can be unlocked, when being in the second on-state, described braking circuit is connected, described operating circuit disconnects, electric brake is opened, machine is braked.The housing 11 of electric garden tool 10 is provided with a stopping means (not shown) coordinated with brake control piece 22, as V-type sheet spring element, brake control piece 22 has a cam surface (not shown) corresponding with the V-structure of sheet spring element, make when electric garden tool 10 normally works, cam surface on brake control piece 22 is positioned at the side of sheet spring element V-structure and limited, and overcome the elastic force of sheet spring when starting brake control piece 22 and compressed into the opposite side of V-structure and again spacing, be understandable that, also other limit elements well known to those skilled in the art can be adopted, as realized by two intermeshing elements.
Hang arm 222 at brake control piece 22 and be fixedly connected with a brake block 24 on the side of brushless electric machine 19, along with the startup of brake control piece 22, can the rub outer surface of rotor 191 of brushless electric machine 19 of brake block 24 realizes a mechanical brake, be understandable that, the concrete mode that above-mentioned brake block 24 is fixedly connected with can be screw well known to those skilled in the art connection, interference fit etc.Brake block 24 can be made by choice for use metal material, also other can provide the material of larger frictional resistance can to use rubber friction block, brake bakelite etc. as required, in order to better brushless motor 19, the part that can install larger coefficient of friction on rotor 191 additional forms a friction hub (not shown), brake block 24 is applied directly on friction hub, frictional force between further increase brake block and rotor, shortens braking time.In embodiments of the present invention, workpiece is by brushless electric machine 19 Direct driver, consider design needs, in other embodiments, a gear-driven assembly (not shown) be connected with brushless electric machine 19 also can be set, by the output shaft outer surface of slip gear transmission component to realize braking, certainly, also can direct friction brushless electric machine 19 motor output shaft (not shown) outer surface with realize braking.
Below the specific operation process of the anxious stop mechanism of brake that electric garden tool 10 machinery of embodiment of the present invention combines with electronics is described in detail.Please refer to Fig. 4 and Fig. 5, it is machine normal operating conditions described in Fig. 4, brake control piece 22 is in by the primary importance of an elastic component towards unlocking direction bias voltage, now brake switch is in the first on-state, the switch trigger 14 pressed on main handle 13 connects main switch 20, and operating circuit is open-minded, and braking circuit disconnects, brake block 14 is positioned at away from brushless electric machine 19, and therefore brushless electric machine 19 carries out cutting work by direction initialization High Rotation Speed.As shown in Figure 5, when the machinery requirement brake anxious stopping time, pull forward brake control piece 22, the control piece 22 that now brakes rotates arrival second desired location in the counterclockwise direction, stir the switch rocker 231 of brake switch 23, brake switch 23 is transformed into the second on-state by the first on-state, now operating circuit disconnects, braking circuit is connected, continue to pull forward brake control piece 22, now brake control piece 22 rotatable arrival the 3rd setting position, the control piece 22 that now brakes hangs the brake block 24 that arm 222 is fixedly connected with and moves to close to brushless motor 19, the outer rotor 191 that friction rotates applies frictional resistance, the opposing torque itself produced with brushless electric machine 19 before brakes outer rotor 191 simultaneously, motor is stopped the rotation instantaneously, play the anxious effect stopped of brake, be understandable that, second setting position of brake control piece 22 described here can overlap with the 3rd desired location, that is can start electric brake and mechanical brake realizes fast braking at same desired location simultaneously, this depends on the needs of actual design, preferably adopt the mode successively starting electric brake and mechanical brake, mechanical brake is restarted when utensil speed reduces after starting electric brake, the damage that friction outer rotor brings can be prevented like this, the object of Quick brake can be reached again.
By the brake modes of electric-mechanic control system in embodiment of the present invention, when face a danger situation time, user can directly to front pulling brake control piece 22 to start brake, even if when electric garden tool 10 recoils fast, user has little time driving brake control piece 22, due to the hand of user can be touched near the brake control piece 22 of front handlebar at first and start brake and realize fast braking, simultaneously, the brake modes of this electric-mechanic control system can be that electric brake and mechanical brake successively act on utensil, also the working forms being simultaneously applied to utensil can be adopted according to actual needs, here by distance between brake block 24 and outer rotor 191 on adjustment brake control piece and then adjust mechanical brake and participate in the time point that electric-mechanic control system brakes.Structure of the present invention is simple, cost is low, the brake reliability of electric garden tool and life-span are improved, braking time have also been obtained guarantee simultaneously, its braking quality is stablized, no matter all can adopt in high speed or low-speed electronic garden instrument, for more high-revolving electric garden tool, there is larger use value.
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 (14)
1. an electric garden tool, comprise a housing, one is installed to the brushless electric machine in housing, a workpiece driven by described brushless electric machine, it is characterized in that: described electric garden tool also comprise an electric brake by electronics mode brushless motor, one mechanically the mechanical brake of brushless motor and one for controlling the brake control piece of described electric brake and mechanical brake.
2. electric garden tool according to claim 1, it is characterized in that: by primary importance, the second place that described electric brake is opened and the 3rd position that described mechanical brake is opened that a setting element is spacing when described brake control piece comprises a machine normal operating.
3. electric garden tool according to claim 1, is characterized in that: by the primary importance that a setting element is spacing when described brake control piece comprises a machine normal operating, a second place of described electric brake and mechanical brake simultaneously being opened.
4. electric garden tool according to claim 1, is characterized in that: described electric brake comprises a braking circuit and one to be triggered by brake control piece and directly can control the brake switch of braking circuit break-make.
5. electric garden tool according to claim 4, it is characterized in that: described electric garden tool also comprises one and arranges electronic controller in the housing, a switch trigger and a main switch controlled by described switch trigger, described braking circuit arranges in described electronic controller, described electronic controller is electrically connected with described brushless electric machine, and described main switch and described brake switch are connected with electronic controller and formed an operating circuit.
6. electric garden tool according to claim 5, it is characterized in that: described brake control piece one end forms one can for the operating portion of brake operation, the other end form that a relative housing swings outstanding go out arm, describedly hang arm and form a groove in the part coordinated with described brake switch, described brake switch has a switch rocker be installed in groove, and described switch rocker swings along with the rotary motion of hanging arm.
7. electric garden tool according to claim 6, it is characterized in that: described brake switch comprises two kinds of on-states, be disconnect the first on-state that described braking circuit connects operating circuit simultaneously respectively, and connect the second on-state that described braking circuit disconnects described operating circuit simultaneously.
8. electric garden tool according to claim 4, it is characterized in that: described brushless electric machine is Three-phase electronic commutating machine, its short circuit is also produced the opposing torque of the described brushless electric machine of braking by described braking circuit applying controlled resistor or conductive line traverses wherein two phase coils.
9. electric garden tool according to claim 1, is characterized in that: described mechanical brake comprises a brake block be connected with described brake control piece, and described brake block is made up of metal material or elastomeric material.
10. electric garden tool according to claim 9, it is characterized in that: described brushless electric machine is outer rotor brushless motor, described brake block comprises a primary importance away from brushless electric machine, and one is driven into the second place of rotor outer surface of the brushless electric machine rotated that can rub by brake control piece.
11. electric garden tools according to claim 9, it is characterized in that: described brake block comprises a primary importance away from brushless electric machine, and one is driven into the second place of the brushless electric machine output shaft outer surface rotated that can rub by brake control piece.
12. electric garden tools according to claim 9, it is characterized in that: described electric garden tool also comprises a gear-driven assembly be connected with brushless electric machine, described gear-driven assembly has an output shaft, described brake block comprises a primary importance away from described gear-driven assembly, and one is driven into the second place of the output shaft outer surface of the described gear-driven assembly that can rub by brake control piece.
13. electric garden tools according to claim 9, is characterized in that: described brushless electric machine is provided with can with the friction hub being connected to the brake block braked on control piece and directly contacting.
14. electric garden tools according to claim 1-13 any one, it is characterized in that: described electric garden tool is chain saw, described workpiece is a saw chain driven by described brushless electric machine, and described brake control piece is a brake baffle plate that can rotate relative to housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310543221.9A CN104604548B (en) | 2013-11-05 | 2013-11-05 | Electric gardening tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310543221.9A CN104604548B (en) | 2013-11-05 | 2013-11-05 | Electric gardening tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104604548A true CN104604548A (en) | 2015-05-13 |
| CN104604548B CN104604548B (en) | 2018-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310543221.9A Active CN104604548B (en) | 2013-11-05 | 2013-11-05 | Electric gardening tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN104604548B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106508449A (en) * | 2016-09-13 | 2017-03-22 | 天津迈克重工有限公司 | Accessory head of hydraulic chain saw |
| CN107347468A (en) * | 2016-11-22 | 2017-11-17 | 浙江白马实业有限公司 | A kind of light garden instrument of the multi-purpose more combinations of bull |
| WO2020108569A1 (en) * | 2018-11-28 | 2020-06-04 | 南京德朔实业有限公司 | Chainsaw, electric tool, and method for controlling electric tool |
| CN111226626A (en) * | 2018-11-28 | 2020-06-05 | 南京德朔实业有限公司 | Chain saw, electric tool, and control method for electric tool |
| CN111245312A (en) * | 2018-11-28 | 2020-06-05 | 南京德朔实业有限公司 | Electric tool and control method of electric tool |
| EP3595855A4 (en) * | 2017-09-27 | 2020-08-05 | Changzhou Globe Co., Ltd. | Ergonomic chainsaw with high operation safety |
| CN111823328A (en) * | 2019-04-23 | 2020-10-27 | 株式会社牧田 | Chain saw |
| WO2023197732A1 (en) * | 2022-04-15 | 2023-10-19 | 浙江白马科技有限公司 | Garden tool |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106508449A (en) * | 2016-09-13 | 2017-03-22 | 天津迈克重工有限公司 | Accessory head of hydraulic chain saw |
| CN106508449B (en) * | 2016-09-13 | 2022-04-29 | 天津迈克重工有限公司 | Hydraulic oil saw accessory head |
| CN107347468A (en) * | 2016-11-22 | 2017-11-17 | 浙江白马实业有限公司 | A kind of light garden instrument of the multi-purpose more combinations of bull |
| CN107347468B (en) * | 2016-11-22 | 2023-08-25 | 浙江白马科技有限公司 | Multi-head multipurpose multi-combination portable gardening tool |
| EP3595855A4 (en) * | 2017-09-27 | 2020-08-05 | Changzhou Globe Co., Ltd. | Ergonomic chainsaw with high operation safety |
| WO2020108569A1 (en) * | 2018-11-28 | 2020-06-04 | 南京德朔实业有限公司 | Chainsaw, electric tool, and method for controlling electric tool |
| CN111226626A (en) * | 2018-11-28 | 2020-06-05 | 南京德朔实业有限公司 | Chain saw, electric tool, and control method for electric tool |
| CN111245312A (en) * | 2018-11-28 | 2020-06-05 | 南京德朔实业有限公司 | Electric tool and control method of electric tool |
| CN111226626B (en) * | 2018-11-28 | 2022-09-16 | 南京泉峰科技有限公司 | Chain saw, electric tool, and control method for electric tool |
| CN111823328A (en) * | 2019-04-23 | 2020-10-27 | 株式会社牧田 | Chain saw |
| CN111823328B (en) * | 2019-04-23 | 2023-02-21 | 株式会社牧田 | Chain saw |
| WO2023197732A1 (en) * | 2022-04-15 | 2023-10-19 | 浙江白马科技有限公司 | Garden tool |
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