CN204907275U - Electron braking system and electric tool - Google Patents
Electron braking system and electric tool Download PDFInfo
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- CN204907275U CN204907275U CN201520554353.6U CN201520554353U CN204907275U CN 204907275 U CN204907275 U CN 204907275U CN 201520554353 U CN201520554353 U CN 201520554353U CN 204907275 U CN204907275 U CN 204907275U
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Abstract
The utility model relates to an electron braking system, including brushless motor, with the brushless controller of source phase series connection and be connected their brake switch, brushless motor has the three -phase coil, brushless controller correspondence is equipped with three contacts, the brake switch has first on -state and second on -state, wherein at first on -state, brushless motor's three -phase coil with three contacts of brushless controller correspond the intercommunication respectively, at the second on -state, brushless motor's the equal short circuit of three -phase coil. When needing the scram brake, through the on -state that switches over the brake switch, make brushless motor's three -phase coil short circuit simultaneously, provide great reverse braking moment to reach the purpose of quick brake and need not introduce the auxiliary machinery brake. Still provide an electric tool, including aforesaid electron braking system and by brushless motor driven workpiece.
Description
Technical field
The utility model relates to electric tool, particularly relates to the electronic brake system,electronic antiskid system of electric 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.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, when chain saw recoils, only acts 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, and therefore above two kinds of brake modes all have some limitations.
Utility model content
Based on this, be necessary the electronic brake system,electronic antiskid system that a kind of energy Quick brake is provided.
A kind of electronic brake system,electronic antiskid system, the brushless controller comprise brushless electric machine, being in series with power supply and the brake switch being connected them, described brushless electric machine has three-phase coil, described brushless controller correspondence is provided with three place's contacts, described brake switch has the first on-state and the second on-state, wherein in the first on-state, the three-phase coil of described brushless electric machine is communicated with three place's contacts of described brushless controller are corresponding respectively, in the second on-state, the equal short circuit of three-phase coil of described brushless electric machine.
Above-mentioned electronic brake system,electronic antiskid system, when needs suddenly stop brake, by switching the on-state of brake switch, making the three-phase coil short circuit simultaneously of brushless electric machine, providing larger plugging moment, thus reaches the object of Quick brake and do not need introducing Aided Machine to brake.
Wherein in an embodiment, also comprise power supply, main switch, the series connection of described power supply, main switch, brushless controller and brake switch forms operating circuit.
Wherein in an embodiment, described power supply is battery.
Wherein in an embodiment, wherein in the second on-state, wherein two phase coils in the three-phase coil of described brushless electric machine are all shorted together with another phase coil and produce the opposing torque of brushless motor.
Wherein in an embodiment, described brushless electric machine is rotor DC brushless motor.
Wherein in an embodiment, described brake switch comprises two normally-closed contacts and two pairs of movable contacts, corresponding a pair movable contact of each normally-closed contact, three place's contacts of wherein said brushless controller are connected to a movable contact respectively, wherein two phase coils in the three-phase coil of brushless electric machine are connected with a normally-closed contact respectively, and a remaining phase coil is then connected with a remaining movable contact and is connected with in three place's contacts of brushless controller simultaneously; Wherein at the first connected state, two phase coils are had to be communicated to a contact respectively by the combination of normally-closed contact and movable contact in three-phase coil, a remaining phase coil then directly or by a movable contact is communicated with contact, at the second connected state, with other two phase coil short circuits while of the phase coil be connected with moving contact.
Wherein in an embodiment, described brake switch is a double-point double-throw switch.
Wherein in an embodiment, described brake switch is two single-pole double-throw switch (SPDT)s.
A kind of electric tool is also proposed, the workpiece comprising the electronic brake system,electronic antiskid system described in aforementioned any one and driven by described brushless electric machine.
Wherein in an embodiment, described electric tool is chain saw, and described workpiece is saw chain.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the electronic brake system,electronic antiskid system of an embodiment.
Related elements reference numeral in figure is as follows:
110, brushless electric machine 120, brushless controller 130, brake switch
140, main switch 150, power supply
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the utility model.But the utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar improvement without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public specific embodiment.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
Below in conjunction with accompanying drawing, better embodiment of the present utility model is described.
The utility model provides a kind of electronic brake system,electronic antiskid system, can be applied to various use brushless electric machine in the electric garden tool driving workpiece, as pruner, mower, chain saw etc.Herein, be described to be applied to chain saw.Chain saw is a kind of common electric tool, and its workpiece is the saw chain be wrapped on guide plate.Saw chain is driven by brushless electric machine and cyclically advances around guide plate.The structure of chain saw is well known to those skilled in the art itself, does not repeat herein.
Ginseng Fig. 1, electronic brake system,electronic antiskid system comprises the brushless electric machine 110 for driving saw chain work, the brushless controller 120 be electrically connected with brushless electric machine 110, brake switch 130, main switch 140 and power supply 150.Wherein, power supply 150, main switch 140, brushless controller 120, brake switch 130 are connected and are formed operating circuit.Brake switch 130, for the disconnection of the anxious stopping time operating circuit that controls to brake, makes brushless electric machine 110 short circuit to carry out electric brake simultaneously.Main switch 140 is the master switch of operating circuit, and it can also control other electronic component simultaneously.Only have main switch 140 to connect, and when brushless electric machine 110 is communicated with brushless controller 120 by brake switch 130, brushless electric machine 110 could start and normally works.
Fig. 1 illustrates the principle that the utility model electronic brake system,electronic antiskid system carries out electric brake.Wherein, the brushless electric machine 110 that chain saw adopts is Three-phase electronic commutating machine, and it has U, V, W three-phase coil.Brushless controller 120 correspondence is provided with three place's contacts, is respectively contact U, V, W.Brake switch 130 is connected between brushless electric machine 110 and brushless controller 120.Brake switch 130 has the first on-state and the second on-state, wherein in the first on-state, the three-phase coil of brushless electric machine 110 is communicated with one by one with three place contact U, V, W of brushless controller 120 are corresponding respectively, namely contact U is communicated with U phase coil, contact V is communicated with V phase coil, and contact W is communicated with W phase coil; In the second on-state, the equal short circuit of three-phase coil of brushless electric machine 110.Brushless electric machine 110 is DC brushless motors, and the power brick by battery or multiple battery composition is powered.
Under the state that main switch 140 is closed, and when brake switch 130 is in the first on-state, brushless electric machine 110 normally could start work.When the needs brake anxious stopping time, without the need to operating main switch 140, its maintenance is motionless, brake switch 130 is made to be converted to the second on-state by the first on-state, now braking circuit starts, the equal short circuit of three-phase coil of brushless electric machine 110, be equivalent to connect a negater circuit, the rotor of brushless electric machine 110 continues High Rotation Speed due to inertia, now the motor kinetic energy of free-wheel to be converted to electric energy as a generator and to discharge rapidly by brushless electric machine 110, produce an opposing torque, stop the free-wheel of rotor, thus realize the Quick brake of electric tool.Without the need to operating main switch 140, can the operating time be saved, and then shorten the braking time of manual operation generation.The equal short circuit of three-phase coil, can provide larger plugging moment, obtains less braking time.
Ginseng Fig. 1, brake switch 130 comprises two normally-closed contacts 1 and 2 and two pairs of movable contacts (3 and 4, and 5 and 6), corresponding a pair movable contact of each normally-closed contact, the corresponding movable contact 3,4 of normally-closed contact 1 in Fig. 1 also forms a single-pole double-throw switch (SPDT), and the corresponding movable contact 5,6 of normally-closed contact 2 form a single-pole double-throw switch (SPDT).Therefore, the brake switch 130 in the present embodiment can be a double-point double-throw switch, also can be two single-pole double-throw switch (SPDT)s be set up in parallel.
Three place contact U, V, W of brushless controller 120 are connected to a movable contact respectively.Wherein two phase coils in the three-phase coil of brushless electric machine 110 are connected with a normally-closed contact respectively, and a remaining phase coil is then connected with a remaining movable contact and is connected with in three place's contacts of brushless controller 120 simultaneously.Particularly, contact U is connected with movable contact 3, and contact V is connected with movable contact 4, and contact W is then connected with movable contact 6, and U phase coil is connected with normally-closed contact 1, and V phase coil is connected with normally-closed contact 2, and W phase coil, movable contact 4 and contact W link together.
Ginseng Fig. 1, brake switch 130 is in the first on-state, and wherein normally-closed contact 1 is connected with movable contact 3, and U phase coil is communicated with contact V; Normally-closed contact 2 is connected with movable contact 5, and V phase coil is communicated with contact V; W phase coil then directly or by moving contact 6 is communicated with contact W by wire, as long as now closed by main switch 140, namely operating circuit is switched on, and brushless electric machine 110 normally can start work.When brake switch 130 is in the second on-state, normally-closed contact 1 and movable contact 3 disconnect, and be connected, U phase coil and W phase coil are shorted together with movable contact 4; Normally-closed contact 2 and movable contact 5 disconnect, be connected with movable contact 6, V phase coil and W phase coil are shorted together, thus the equal short circuit of the three-phase coil of brushless electric machine 110, the free-wheel of brushless electric machine 110, by producing reverse moment, makes brushless electric machine 110 stop operating rapidly.
To sum up, electronic brake system,electronic antiskid system of the present utility model, in the needs anxious stopping time, by switching the on-state of brake switch 130, make the three-phase coil short circuit simultaneously of brushless electric machine 110, make brushless electric machine 110, as a generator, the motor kinetic energy of inertia is converted to electric energy, and discharge rapidly, larger plugging moment is provided, and then realizes anxious stopping of braking.Compared with mechanical brake, solve user because anti-braking time of playing is long, the puzzlement of the accidental bodily injury that may bring.Compared with common electric brake, three-phase coil short circuit simultaneously, can provide larger braking moment, shortens braking time, through measuring and calculating, within braking time can foreshorten to 0.1 second, can apply to high speed chain saw and not need to add Aided Machine brake.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. an electronic brake system,electronic antiskid system, the brushless controller comprise brushless electric machine, being in series with power supply and the brake switch being connected them, described brushless electric machine has three-phase coil, described brushless controller correspondence is provided with three place's contacts, it is characterized in that, described brake switch has the first on-state and the second on-state, wherein in the first on-state, the three-phase coil of described brushless electric machine is communicated with three place's contacts of described brushless controller are corresponding respectively, in the second on-state, the equal short circuit of three-phase coil of described brushless electric machine.
2. electronic brake system,electronic antiskid system according to claim 1, is characterized in that, also comprises power supply, main switch, and the series connection of described power supply, main switch, brushless controller and brake switch forms operating circuit.
3. electronic brake system,electronic antiskid system according to claim 2, is characterized in that, described power supply is battery.
4. electronic brake system,electronic antiskid system according to claim 1, is characterized in that, wherein in the second on-state, wherein two phase coils in the three-phase coil of described brushless electric machine are all shorted together with another phase coil and produce the opposing torque of brushless motor.
5. electronic brake system,electronic antiskid system according to claim 1, is characterized in that, described brushless electric machine is rotor DC brushless motor.
6. electronic brake system,electronic antiskid system according to claim 1, it is characterized in that, described brake switch comprises two normally-closed contacts and two pairs of movable contacts, corresponding a pair movable contact of each normally-closed contact, three place's contacts of wherein said brushless controller are connected to a movable contact respectively, wherein two phase coils in the three-phase coil of brushless electric machine are connected with a normally-closed contact respectively, and a remaining phase coil is then connected with a remaining movable contact and is connected with in three place's contacts of brushless controller simultaneously; Wherein at the first connected state, two phase coils are had to be communicated to a contact respectively by the combination of normally-closed contact and movable contact in three-phase coil, a remaining phase coil then directly or by a movable contact is communicated with contact, at the second connected state, with other two phase coil short circuits while of the phase coil be connected with moving contact.
7. electronic brake system,electronic antiskid system according to claim 6, is characterized in that, described brake switch is a double-point double-throw switch.
8. electronic brake system,electronic antiskid system according to claim 6, is characterized in that, described brake switch is two single-pole double-throw switch (SPDT)s.
9. an electric tool, is characterized in that, comprise electronic brake system,electronic antiskid system according to any one of claim 1 to 8 and by as described in the workpiece that drives of brushless electric machine.
10. electric tool according to claim 9, is characterized in that, described electric tool is chain saw, and described workpiece is saw chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520554353.6U CN204907275U (en) | 2015-07-28 | 2015-07-28 | Electron braking system and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520554353.6U CN204907275U (en) | 2015-07-28 | 2015-07-28 | Electron braking system and electric tool |
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| CN204907275U true CN204907275U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520554353.6U Active CN204907275U (en) | 2015-07-28 | 2015-07-28 | Electron braking system and electric tool |
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| CN (1) | CN204907275U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208823A (en) * | 2016-07-26 | 2016-12-07 | 上海互邦医疗器械有限公司 | A kind of safe electronic brake gear of electric wheelchair |
| CN106452200A (en) * | 2016-11-22 | 2017-02-22 | 广东美的暖通设备有限公司 | Typhoon power protection circuit of outdoor fan in air conditioner, outdoor unit and air conditioner |
| CN107343833A (en) * | 2017-06-27 | 2017-11-14 | 上海互邦智能康复设备股份有限公司 | The brake method and driving and braking circuit of a kind of electric wheelchair using brushless electric machine driving |
| CN107484488A (en) * | 2016-06-13 | 2017-12-19 | 本田技研工业株式会社 | The control device of power-operated mower |
| CN107959448A (en) * | 2018-01-22 | 2018-04-24 | 安图实验仪器(郑州)有限公司 | Stepper motor brake system based on relay control |
| CN108512464A (en) * | 2017-02-24 | 2018-09-07 | 南京德朔实业有限公司 | Brake circuit and electric tool |
| CN108832745A (en) * | 2018-06-20 | 2018-11-16 | 安徽美芝精密制造有限公司 | The electric machine assembly and compressor of compressor |
| CN112398381A (en) * | 2019-08-16 | 2021-02-23 | 联合汽车电子有限公司 | Stopping method and control method of brushless direct current motor, motor controller and electric device |
-
2015
- 2015-07-28 CN CN201520554353.6U patent/CN204907275U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107484488A (en) * | 2016-06-13 | 2017-12-19 | 本田技研工业株式会社 | The control device of power-operated mower |
| CN106208823A (en) * | 2016-07-26 | 2016-12-07 | 上海互邦医疗器械有限公司 | A kind of safe electronic brake gear of electric wheelchair |
| CN106452200A (en) * | 2016-11-22 | 2017-02-22 | 广东美的暖通设备有限公司 | Typhoon power protection circuit of outdoor fan in air conditioner, outdoor unit and air conditioner |
| CN106452200B (en) * | 2016-11-22 | 2019-02-19 | 广东美的暖通设备有限公司 | Typhoon power protecting circuit, outdoor unit and the air conditioner of outdoor fan in air conditioner |
| CN108512464A (en) * | 2017-02-24 | 2018-09-07 | 南京德朔实业有限公司 | Brake circuit and electric tool |
| CN108512464B (en) * | 2017-02-24 | 2020-07-17 | 南京德朔实业有限公司 | Brake circuit and electric tool |
| CN107343833A (en) * | 2017-06-27 | 2017-11-14 | 上海互邦智能康复设备股份有限公司 | The brake method and driving and braking circuit of a kind of electric wheelchair using brushless electric machine driving |
| CN107959448A (en) * | 2018-01-22 | 2018-04-24 | 安图实验仪器(郑州)有限公司 | Stepper motor brake system based on relay control |
| CN108832745A (en) * | 2018-06-20 | 2018-11-16 | 安徽美芝精密制造有限公司 | The electric machine assembly and compressor of compressor |
| CN112398381A (en) * | 2019-08-16 | 2021-02-23 | 联合汽车电子有限公司 | Stopping method and control method of brushless direct current motor, motor controller and electric device |
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