CN204487508U - A kind of brushless electric tool integrated switch structure and electric tool - Google Patents
A kind of brushless electric tool integrated switch structure and electric tool Download PDFInfo
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- CN204487508U CN204487508U CN201520185111.4U CN201520185111U CN204487508U CN 204487508 U CN204487508 U CN 204487508U CN 201520185111 U CN201520185111 U CN 201520185111U CN 204487508 U CN204487508 U CN 204487508U
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Abstract
The utility model discloses a kind of brushless electric tool integrated switch structure and electric tool.Described brushless electric tool integrated switch structure comprises governor circuit, speed-regulating switch circuit and power switch pipe.Described speed-regulating switch circuit is electrically connected with described governor circuit, and described power switch pipe is electrically connected with described governor circuit.Wherein, described governor circuit, described speed-regulating switch circuit and described power switch pipe integrate.By adopting the brushless electric tool integrated switch structure that provides of the utility model, can shorten control loop, reducing circuit interference, the line between simultaneously also reducing because of circuit board disconnects the fault caused, and simplifies and assembles, reduce costs.
Description
Technical field
The utility model relates to a kind of brushless electric tool integrated switch structure and electric tool.
Background technology
As everyone knows, inside hardware & tools, the use of electric tool should be most popular one.No matter produce that efficiency is higher, structure is slim and graceful, energy consumption is low because electric tool has, portably use the features such as convenient, be obtained in industrial production or family's use to apply widely.Along with economic globalization, electric tool market development is swift and violent.
Known a kind of electric tool, it comprises power brick, main control board, power switch pipe (MOSFET) and speed-regulating switch circuit board, brushless motor etc.Brushless motor, main control board, power switch pipe (MOSFET) and speed-regulating switch circuit board etc. form power tool body, power brick and power tool body releasable connection.Wherein, main control board, power switch pipe (MOSFET) and speed-regulating switch circuit board are independently arranged as different circuit boards, and complex structure, reliability is low.
Utility model content
The purpose of this utility model is, provides a kind of brushless electric tool integrated switch structure, and its structure is simple, uses reliable.
The utility model is achieved through the following technical solutions: a kind of brushless electric tool integrated switch structure, described brushless electric tool integrated switch structure comprises governor circuit, speed-regulating switch circuit and power switch pipe, described speed-regulating switch circuit is electrically connected with described governor circuit, described power switch pipe is electrically connected with described governor circuit, wherein, described governor circuit, described speed-regulating switch circuit and described power switch pipe integrate.
The utility model also provides a kind of electric tool, and described electric tool comprises above-mentioned brushless electric tool integrated switch structure.
The beneficial effects of the utility model are: in brushless electric tool integrated switch structure of the present utility model, and governor circuit, speed-regulating switch circuit, power switch pipe integrate and form new switch, and its structure is simple, use reliable.
Compared with prior art, brushless electric tool integrated switch structure of the present utility model at least has following advantage:
(1) governor circuit, speed-regulating switch circuit, power switch pipe are integrated on same circuit board (i.e. speed-regulating switch circuit board), shorten control loop, reduce circuit interference, and the line between simultaneously also reducing because of circuit board breaks the fault caused;
(2) whole electric tool only has one piece of wiring board, does not have the line between each circuit board, is convenient to produce assembling;
(3) whole electric tool only has one piece of wiring board, can save wiring board, control line and binding post, reduce the cost of product.
Accompanying drawing explanation
Fig. 1 is the profile schematic perspective view of the brushless electric tool integrated switch structure according to an embodiment of the present utility model;
Fig. 2 is that the housing of the brushless electric tool integrated switch structure removing Fig. 1 is to show the figure of governor circuit, speed-regulating switch circuit, power switch pipe;
Fig. 3 is the schematic block diagram of the electric tool of the brushless electric tool integrated switch structure comprising Fig. 1;
Fig. 4 is another schematic block diagram of the electric tool comprising brushless electric tool integrated switch structure, and the brushless electric machine of this electric tool is the brushless electric machine without Hall element;
Number in the figure implication is as follows: 10-electric tool; 100-brushless electric tool integrated switch structure; 102-governor circuit; 104-speed-regulating switch circuit; 106-power switch pipe; 108-speed governing button; 110-housing; 112-radiator; 200-power brick; 300-brushless motor; 302-motor assembly line; 400-position sensor.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is further detailed.
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.On the contrary, embodiment of the present utility model comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
As depicted in figs. 1 and 2, the brushless electric tool integrated switch structure 100 of the present embodiment comprises governor circuit 102, speed-regulating switch circuit 104 and power switch pipe (metal-oxide layer semiconductcor field effect transistor, be called for short metal-oxide half field effect transistor, English Metal-Oxide-Semiconductor Field-Effect Transistor, english abbreviation MOSFET) 106, speed governing button 108, housing 110, radiator 112 etc.In addition, brushless electric tool integrated switch structure 100 is also provided with brake instruction output interface, interface such as parameters input such as motor instruction output interface, temperature etc. etc.Described speed-regulating switch circuit 104 is electrically connected with described governor circuit 102.Described power switch pipe 106 is electrically connected with described governor circuit 102.Wherein, described governor circuit 102, described speed-regulating switch circuit 104 and described power switch pipe 106 integrate, and form new integrated switch structure.In other words, described governor circuit 102, described speed-regulating switch circuit 104 and described power switch pipe 106 are integrated in same PCBA (printed circuit board assembly; Printed circuit-board assembly) on.This block circuit board such as can be called integrated speed-regulating switch circuit board.Described governor circuit 102, described speed-regulating switch circuit 104 and described power switch pipe 106 are all fixed in housing 110.
Radiator 112 is arranged near power switch pipe 106, to reduce the temperature of power switch pipe 106, efficiently radiates heat.Radiator 112 can be such as copper coin.
Governor circuit 102 is according to position sensor 400 or the change of rotor-position that detects according to the counter electromotive force of inducting produced in motor self coil, along a graded, the change of current (the i.e. position of detection rotor magnetic pole relative stator winding is carried out to the electric current of stator winding, and produce position sensor signal in the position determined, go to control power switch pipe circuit 106 after governor circuit 102 processes, carry out winding current switching by certain logical relation).Position sensor can adopt the position sensor of Mageneto-sensitive type, photo-electric and electromagnetic type three types.When adopting Mageneto-sensitive type position sensor, its magneto-dependent sensor part (such as Hall element, magnetodiode, magnetosensitive explain archaic or dialectal words in current language pole pipe, magnetoresister or special IC etc.) is contained on stator, is used for detecting the changes of magnetic field produced when PM rotor rotates.When adopting photoelectric position sensor, stator configures optoelectronic sensor, rotor is equipped with shadow shield, light source can adopt light emitting diode or miniature bulb.When rotor rotates, due to the effect of shadow shield, the photosensitive components and parts on stator will by pulse signal raw between certain frequency interval.In addition, when adopting electromagnetic position sensor, that electromagnetic sensor parts (such as coupling transformer, proximity switch, LC resonance circuit etc.) are installed on stator module, when PM rotor position changes, galvanomagnetic-effect will make electromagnetic sensor produce voltage signal (its amplitude changes with rotor-position).In the present embodiment, described six switching tubes 106 are arranged around an even circumferential.In the present embodiment, brushless motor is direct current three-phase motor.Described brushless motor comprises PM rotor and three pole wound stator.Every phase winding coil needs pair of switches pipe to drive, so the present embodiment needs an integral multiple power switch pipe of six.
Wherein, position sensor 400 and power switch pipe 106 are all electrically connected with described governor circuit 102.Position sensor can adopt the types such as Mageneto-sensitive type, photo-electric and electromagnetic type.In the present embodiment, at least one position sensor 400 described is Hall element.Positional information, for detecting the position of each magnetic pole of brushless motor, is sent to governor circuit 102 by position sensor 400.Then, governor circuit 102, according to the positional information received, opens corresponding power switch pipe 106 successively.
Such as, in the course of work of brushless motor, the three pole wound stator be made up of three groups of coils, the sense of current according to flowing through coil produces forward (or reverse) rotating excitation field.Rotor is made up of permanent magnet, with the magnetic field interaction of coil.The position of position sensor detection rotor, and send to governor circuit (controller) 102.Six power switch pipes form commutators, for opening or the coil current of closed stator and the sense of current.Six power switch pipes 106 are such as respectively the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube.Wherein, the first switching tube, second switch pipe, the 3rd switching tube are called upper arm switching tube; 4th switching tube, the 5th switching tube, the 6th switching tube are called underarm switching tube.The current position of rotor that governor circuit 102 arrives according to the hall sensing of position sensor 400, then the order of opening the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube in (or closedown) commutator is determined according to stator winding, make electric current sequentially flow through motor phase coil and produce forward (or reverse) rotating excitation field, and with the permanent magnet interaction of rotor, so just can make motor up time/inverse time rotation.When another hall sensing that rotor turns to position sensor 400 goes out the position of another group signal, governor circuit 102 opens again next group switching tube again, and circulation motor like this just can be rotated further according to same direction until control part determines to want rotor to stop, closing switch pipe (or only opening underarm switching tube); If need rotor reverse, switching tube opening sequence is contrary.
The utility model also provides a kind of electric tool.As shown in Figure 3, described electric tool 10 comprises power brick 200, above-mentioned brushless electric tool integrated switch structure 100 and brushless motor 300.Described power brick 200 is electrically connected with described brushless electric tool integrated switch structure 100, and described brushless electric tool integrated switch structure 100 is connected with described brushless motor 300.
Power brick 200 is connected with above-mentioned brushless electric tool integrated switch structure 100 by anode end interface, GND end interface, communication terminal.In other embodiment, electric tool does not arrange communication terminal.
After above-mentioned brushless electric tool integrated switch structure 100 is connected with power brick 200, governor circuit 102 detects the position of each magnetic pole of brushless motor 300 by position sensor 400, then opens corresponding switching tube 106 successively, drives brushless motor 300 to work.
In addition, arrange on the circuit board of described governor circuit 102, described speed-regulating switch circuit 104 and described power switch pipe 106 in set, all right setting example is as voltage detecting circuit, current detection circuit, temperature sensing circuit, indicator etc.Wherein, the battery core voltage of collection for gathering the voltage of the core that often economizes on electricity of power brick, and is sent to governor circuit by voltage detecting circuit.The electric current of collection for gathering charging current, and is sent to governor circuit by current detection circuit.The battery core group temperature of collection for gathering the temperature of the battery core group of power brick, and is sent to governor circuit by temperature sensing circuit.Indicator is for showing the current capacities and/or current operating state etc. of power brick.Thus, the one or more functions in the functions such as speed governing, battery capacity indication, illumination, overvoltage and under-voltage protection, overcurrent protection, temperature protection, brake function can be realized.
As mentioned above, by the brushless electric tool integrated switch structure adopting the utility model to provide, some control lines and wiring board can be saved, can shorten control loop, reduce circuit interference, the line between simultaneously also reducing because of circuit board disconnects the fault caused, simplify assembling, reduce costs.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.
Claims (2)
1. a brushless electric tool integrated switch structure, it is characterized in that, described brushless electric tool integrated switch structure comprises governor circuit, speed-regulating switch circuit and power switch pipe, described speed-regulating switch circuit is electrically connected with described governor circuit, described power switch pipe is electrically connected with described governor circuit, wherein, described governor circuit, described speed-regulating switch circuit and described power switch pipe integrate.
2. an electric tool, is characterized in that, described electric tool comprises brushless electric tool integrated switch structure according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520185111.4U CN204487508U (en) | 2015-03-30 | 2015-03-30 | A kind of brushless electric tool integrated switch structure and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520185111.4U CN204487508U (en) | 2015-03-30 | 2015-03-30 | A kind of brushless electric tool integrated switch structure and electric tool |
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| Publication Number | Publication Date |
|---|---|
| CN204487508U true CN204487508U (en) | 2015-07-22 |
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|---|---|---|---|
| CN201520185111.4U Active CN204487508U (en) | 2015-03-30 | 2015-03-30 | A kind of brushless electric tool integrated switch structure and electric tool |
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| CN (1) | CN204487508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452219A (en) * | 2016-11-08 | 2017-02-22 | 上海拜骋电器有限公司 | Direct-current brushless switch |
| CN108696211A (en) * | 2018-07-13 | 2018-10-23 | 浙江佳奔电子有限公司 | A kind of brushless direct-current speed-regulating switch with highly integrated structure |
| CN109510530A (en) * | 2017-09-15 | 2019-03-22 | 德丰电创科技股份有限公司 | Electrical switching unit for controlling the operation of a DC motor of an electrical apparatus |
-
2015
- 2015-03-30 CN CN201520185111.4U patent/CN204487508U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452219A (en) * | 2016-11-08 | 2017-02-22 | 上海拜骋电器有限公司 | Direct-current brushless switch |
| CN106452219B (en) * | 2016-11-08 | 2019-11-05 | 上海拜骋电器有限公司 | Brush DC switch |
| CN109510530A (en) * | 2017-09-15 | 2019-03-22 | 德丰电创科技股份有限公司 | Electrical switching unit for controlling the operation of a DC motor of an electrical apparatus |
| CN109510530B (en) * | 2017-09-15 | 2021-03-02 | 德丰电创科技股份有限公司 | Electrical switching unit for controlling the operation of a DC motor of an electrical apparatus |
| CN108696211A (en) * | 2018-07-13 | 2018-10-23 | 浙江佳奔电子有限公司 | A kind of brushless direct-current speed-regulating switch with highly integrated structure |
| CN108696211B (en) * | 2018-07-13 | 2024-05-14 | 浙江佳奔电子有限公司 | Brushless DC speed regulation switch with highly integrated structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231017 Address after: Room 1504, Unit 1, Building 6, No. 1 Huangjin Road, Nancheng Street, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Dehe Technology Co.,Ltd. Address before: 810, Building A1, Tian'an Digital City, No.1 Huangjin Road, Nancheng District, Dongguan City, Guangdong Province, 523080 Patentee before: DONGGUAN LAIMA ELECTRONIC TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |