CN203633205U - Electric garden tool - Google Patents
Electric garden tool Download PDFInfo
- Publication number
- CN203633205U CN203633205U CN201320693828.0U CN201320693828U CN203633205U CN 203633205 U CN203633205 U CN 203633205U CN 201320693828 U CN201320693828 U CN 201320693828U CN 203633205 U CN203633205 U CN 203633205U
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- Prior art keywords
- brake
- electric
- garden tool
- control piece
- brushless
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Abstract
The utility model provides an electric garden tool which comprises a housing, a brushless motor mounted in the housing, and a working part driven by the brushless motor. The electric garden tool is characterized by further comprising an electronic brake for braking the brushless motor electronically, a mechanical brake for mechanically braking the brushless motor, and a brake control piece for controlling the electronic brake and the mechanical brake. The electric garden tool employs a mechanical and electrical combined brake structure which can be used on the high-speed or low-speed electric garden tool; the requirement on brake time can be met; at the same time, the brake performance is stable; the brake life is long; and the requirement of a user is met.
Description
Technical field
The utility model relates to a kind of electric tool, particularly a kind of electric garden tool.
Background technology
Electric tool is widely used in the field such as family, gardens at present, and brushless electric machine is because the feature that its moment is large, power is high is more and more applied in electric tool, to meet the use needs of user to energy-efficient electric tool.Especially electric garden tool, as chain saw, chain saw is a kind ofly to drive on saw chain staggered L shaped blade transverse movement to cut the garden instrument of timber or branch by power set.Chain saw is in the time of normal operating, in the time that sawtooth card is in sawed object, the lasting rotation of motor can cause the upwards swing of chain saw, makes the direction reversing i.e. recoil of chain saw towards user's face, accidents caused, therefore need in the time causing danger situation, brake to stop chain to move in time.
The brake that brushless chain saw in the market adopts mainly contains two kinds: mechanical brake and electric brake, and mechanical brake is for the higher chain saw of rotating speed conventionally, and electric brake is for rotating speed chain saw on the low side.Traditional mechanical brake, complex structure, a brake ribbon need to be set conventionally on housing and coordinate brake with the brake hubs being installed on motor transmission shaft, increase thus product weight, simultaneously simple mechanical brake is in the time that chain saw recoils, only depend on braking element to act on motor transmission shaft, because saw body still has larger rotator inertia, still likely contact and have an accident with facial or other body parts of user, 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 purpose of this utility model be to provide a kind of can Quick brake and the stable electric garden tool of braking quality.
For reaching above-mentioned purpose, the utility model provides a kind of electric garden tool, comprise a housing, one is installed to the brushless electric machine in housing, a workpiece being 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, when described brake control piece comprises a machine normal operating, by a primary importance that setting element is spacing, one by the second place of described electric brake unlatching and the 3rd position that described mechanical brake is opened.
Further, when described brake control piece comprises a machine normal operating by a primary importance that setting element is spacing, the second place that described electric brake and mechanical brake are opened simultaneously.
Further, described electric brake comprises that a braking circuit and one are triggered and can directly be controlled the brake switch of braking circuit break-make by brake control piece.
Further, described braking circuit is arranged on an electronic controller being 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 by the control of described switch trigger, and described main switch is connected with electronic controller with described brake switch and formed an operating circuit.
Further, described brake control piece one end forms one can be for the operating portion of brake operation, the other end forms that a relative housing swings outstanding go out arm, describedly hang arm and form a groove in the part that coordinating with described brake switch, described brake switch has a switch rocking bar being installed in groove, and described switch rocking bar swings along with hanging rotatablely moving of arm.
Further, described brake switch comprises two kinds of on-states, is respectively to disconnect described braking circuit to connect the first on-state of operating circuit simultaneously, and connects described braking circuit and disconnect simultaneously the second on-state of described operating circuit.
Further, described brushless electric machine is Three-phase electronic commutating machine, described braking circuit apply controlled resistor or wire across two phase coils wherein by its short circuit and produce the opposing torque of the described brushless electric machine of braking.
Further, described mechanical brake comprises a brake block being 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 the second place of rotor outer surface that is driven into the brushless electric machine of the rotation that can rub by brake control piece.
Further, described brake block comprises a primary importance away from brushless electric machine, and the second place of brushless electric machine output shaft outer surface that is driven into the rotation that can rub by brake control piece.
Further, described electric garden tool also comprises a gear-driven assembly being 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, on described brushless electric machine, be provided with the friction hub that can directly contact with the brake block being connected on brake control piece.
Further, described electric garden tool is chain saw, and described workpiece is a saw chain being 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 utility model adopts the brake structure of dynamo-electric combination, no matter all can adopt at a high speed or on low-speed electronic garden instrument, can meet the requirement of braking time, braking quality is stable simultaneously, the brake life-span is also longer, adopt the chain saw braking time of this brake structure stable, brake is reliable, meets user's needs.
Accompanying drawing explanation
Fig. 1 is the integrally-built stereogram of the electric garden tool in the utility model embodiment;
Fig. 2 is the partial sectional view of the electric garden tool in the utility model embodiment;
Fig. 3 is the electric brake schematic diagram of the electric garden tool in the utility model embodiment
Cutaway view when the brake control piece of the electric garden tool in Fig. 4 the utility model embodiment is positioned at primary importance;
Fig. 5 is the cutaway view of electric garden tool in the utility model embodiment brake control piece while being positioned at the second place.
Embodiment
Refer to Fig. 1, in embodiment of the present utility model, electric garden tool 10 is chain saw, and it comprises housing 11, be arranged on front handlebar 12 and main handle 13 on housing 11, be arranged on switch trigger 14 on main handle 13 and for realizing the workpiece 15 of concrete function.Workpiece 15 comprises guide plate 16 and saw chain 17, wherein saw chain 17 is looped around guide plate 16 edges and can under the driving of driving mechanism (not shown), cyclically guides along guide plate 16, guide plate 16 one end are supported on housing 11, and the other end extends housing 11 along housing 11 longitudinallies.In addition, in housing 11, also comprise automatic lubricating system (not shown) and power brick 18, 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 utility model also can be applied in the electric garden tool of other application brushless electric machines drivings, the electric garden tool stopping as anxious in needs such as pruner, mower, mowers.
Refer to Fig. 2, Fig. 2 is the cutaway view that removes the electric garden tool 10 of guide plate 16, saw chain 17 and power brick 18 in the utility model embodiment, in housing 11, be provided with one for driving brushless electric machine that saw chain 17 moves 19, a main switch of being controlled by switch trigger 14 20, open and close when main switch 20 normally uses for controlling machine.Electric garden tool 10 also comprises that one is arranged on the electronic controller 21 being connected with brushless electric machine 19 in housing 11, a brake control piece 22, the brake control piece 22 is here a brake baffle plate, and can rotate with respect to housing 11 around fulcrum O, be understandable that, also can brake control piece 22 need to be arranged to a button form according to actual design, need to brake time, press button.Electric garden tool 10 also comprises an electric brake of being 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 with brake switch 23 during simultaneously in a kind of on-state, machine could start normally works.Electric brake also comprises a braking circuit of being controlled by brake switch 23, for controlling the disconnection of the anxious stopping time operating circuit of 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 can control the circuit state of whole machine; realize various electric functions; if soft starter for motor, battery protection are to avoid excess temperature, overcurrent etc., the action of all switches is all also by brushless electric machine 19 being operated after the analysis of electronic controller 21.
Refer to Fig. 3, for the electric brake schematic diagram of embodiment of the present utility model, 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 being 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 illustrated the first on-state, wherein the contact 2 on brake switch 23 is connected with contact 3, contact 5 is connected with contact 6, now three of brushless electric machine 19 loop A, B, C is in on-state, now as long as the main switch 20 of series connection is with it opened, operating circuit is switched on, machine can be unlocked, in the time that brake control piece 22 starts, brake switch 23 is positioned at the second on-state (not shown), now contact 1 is connected with contact 2, contact 4 is connected with contact 5, 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 with short circuit, now be equivalent to connect a negater circuit, rotor 191 is because inertia continues High Rotation Speed, now can produce the magnetic force with its inertia direction of rotation, it is opposing torque, stop the inertia rolling brake brushless electric machine 19 of rotor 191, thereby realize the Quick brake braking of electric garden tool 10, be understandable that and also can between contact 1 and contact 4, connect same can serving the same role of resistance.Brushless electric machine 19 in the utility model embodiment 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 to configure AC brushless electric machine (not shown) according to different, now directly incoming transport power supply of the input of power supply.
Please again consult Fig. 2, in the time that can facing a danger situation for operator, one of brake control piece 22 one end formation carries out the operating portion 221 of brake operation, the other end form one can rotate relative to housing 11 outstanding go out arm 222, describedly hang arm 222 and in the part coordinating with described brake switch 23, be formed with a groove (figure not mark), described brake switch 23 has a switch rocking bar 231 being installed in groove, switch rocking bar 231 swings and then controls the on-state of brake switch 23 along with hanging rotatablely moving of 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, in the time of the first on-state, described braking circuit disconnects, described operating circuit is connected, machine can be unlocked, in the time of the second on-state, described braking circuit is connected, described operating circuit disconnects, electric brake is opened, machine is braked.A stopping means (not shown) coordinating with brake control piece 22 is installed on the housing 11 of electric garden tool 10, as V-type sheet spring element, on brake control piece 22, there is a cam surface (not shown) corresponding with the V-structure of sheet spring element, make in the time of electric garden tool 10 normal work, the cam surface of brake on control piece 22 is positioned at a side of sheet spring element V-structure limited, and overcome the elastic force of sheet spring when control piece 22 and compressed into the opposite side of V-structure and again spacing starting brake, be understandable that, also can adopt other limit elements well known to those skilled in the art, as realized by two intermeshing elements.
The specific operation process of the anxious stop mechanism of brake below electric garden tool 10 machineries of the utility model embodiment being combined with electronics is described in detail.Please refer to Fig. 4 and Fig. 5, it described in Fig. 4, is machine normal operating conditions, brake control piece 22 is in the primary importance towards unlocking direction bias voltage by an elastic component, now brake switch is in the first on-state, the switch trigger 14 of pressing on main handle 13 is connected 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 anxious stopping time of machinery requirement brake, pull forward brake control piece 22, the control piece 22 that now brakes rotates in the counterclockwise direction and arrives the second desired location, stir the switch rocking bar 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, the rotatable arrival of control piece 22 the 3rd setting position now brakes, the control piece 22 that now brakes hangs the brake block 24 being fixedly connected with on arm 222 and moves to and approach brushless motor 19, the outer rotor 191 of friction rotation applies frictional resistance, brake outer rotor 191 with the opposing torque that brushless electric machine 19 before itself produces simultaneously, motor moment is stopped the rotation, play the anxious effect stopping of brake, be understandable that, the second setting position of brake control piece 22 described here can overlap with the 3rd desired location, that is to say and can start electric brake and mechanical brake is realized fast braking at same desired location simultaneously, this depends on the needs of actual design, preferably adopt the mode that successively starts electric brake and mechanical brake, when utensil speed reduces after starting electric brake, restart mechanical brake, the damage that the outer rotor that can prevent from like this rubbing brings, can reach again the object of Quick brake.
By the brake modes of dynamo-electric combination in the utility model embodiment, in the time facing a danger situation, user can directly pull forward brake control piece 22 to start brake, even when electric garden tool 10 recoils fast, user has little time to drive brake control piece 22, the hand that can touch at first user due to the brake control piece 22 near front handlebar starts brake and realizes fast braking, simultaneously, the brake modes of this electromechanics combination can be that electric brake and mechanical brake successively act on utensil, also can adopt according to actual needs the working forms that is simultaneously applied to utensil, here can be by brake on the control piece distance between brake block 24 and outer rotor 191 and then adjust mechanical brake and participate in the dynamo-electric time point in conjunction with brake of adjustment.The utility model is simple in structure, cost is low, brake reliability and the life-span of electric garden tool are improved, braking time is also guaranteed simultaneously, its braking quality is stable, no matter on high speed or low-speed electronic garden instrument, all can adopt, there is larger use value for more high-revolving electric garden tool.
Although the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Under the utility model, in technical field, have and conventionally know the knowledgeable, not departing from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is when being as the criterion depending on claims person of defining.
Claims (14)
1. an electric garden tool, comprise a housing, one is installed to the brushless electric machine in housing, a workpiece being 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: when described brake control piece comprises a machine normal operating, by a primary importance that setting element is spacing, one by the second place of described electric brake unlatching and the 3rd position that described mechanical brake is opened.
3. electric garden tool according to claim 1, it is characterized in that: when described brake control piece comprises a machine normal operating by a primary importance that setting element is spacing, the second place that described electric brake and mechanical brake are opened simultaneously.
4. electric garden tool according to claim 1, is characterized in that: described electric brake comprises that a braking circuit and one are triggered and can directly be controlled the brake switch of braking circuit break-make by brake control piece.
5. electric garden tool according to claim 4, it is characterized in that: described electric garden tool also comprises that one is arranged on the electronic controller in housing, a switch trigger and a main switch by the control of 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 is connected with electronic controller with described brake switch 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 be for the operating portion of brake operation, the other end forms that a relative housing swings outstanding go out arm, describedly hang arm and form a groove in the part that coordinating with described brake switch, described brake switch has a switch rocking bar being installed in groove, and described switch rocking bar swings along with hanging rotatablely moving of arm.
7. electric garden tool according to claim 6, it is characterized in that: described brake switch comprises two kinds of on-states, be respectively to disconnect described braking circuit to connect the first on-state of operating circuit simultaneously, and connect described braking circuit and disconnect simultaneously the second on-state of described operating circuit.
8. electric garden tool according to claim 4, it is characterized in that: described brushless electric machine is Three-phase electronic commutating machine, described braking circuit apply controlled resistor or wire across two phase coils wherein by its short circuit and produce the opposing torque of the described brushless electric machine of braking.
9. electric garden tool according to claim 1, is characterized in that: described mechanical brake comprises a brake block being 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 the second place of rotor outer surface that is driven into the brushless electric machine of the rotation 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 the second place of brushless electric machine output shaft outer surface that is driven into the rotation 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 being 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: on described brushless electric machine, be provided with the friction hub that can directly contact with the brake block being connected on brake control piece.
14. according to the electric garden tool described in claim 1-13 any one, it is characterized in that: described electric garden tool is chain saw, described workpiece is a saw chain being 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 |
|---|---|---|---|
| CN201320693828.0U CN203633205U (en) | 2013-11-05 | 2013-11-05 | Electric garden tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320693828.0U CN203633205U (en) | 2013-11-05 | 2013-11-05 | Electric garden tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203633205U true CN203633205U (en) | 2014-06-11 |
Family
ID=50864505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320693828.0U Withdrawn - After Issue CN203633205U (en) | 2013-11-05 | 2013-11-05 | Electric garden tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203633205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104604548A (en) * | 2013-11-05 | 2015-05-13 | 南京德朔实业有限公司 | Electric gardening tool |
-
2013
- 2013-11-05 CN CN201320693828.0U patent/CN203633205U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104604548A (en) * | 2013-11-05 | 2015-05-13 | 南京德朔实业有限公司 | Electric gardening tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140611 Effective date of abandoning: 20180619 |