CN202685013U - Directional braking system of electric tool - Google Patents
Directional braking system of electric tool Download PDFInfo
- Publication number
- CN202685013U CN202685013U CN 201220268601 CN201220268601U CN202685013U CN 202685013 U CN202685013 U CN 202685013U CN 201220268601 CN201220268601 CN 201220268601 CN 201220268601 U CN201220268601 U CN 201220268601U CN 202685013 U CN202685013 U CN 202685013U
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- electric tool
- main controller
- blade
- rotor
- brakes
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Abstract
The utility model discloses a directional braking system of an electric tool. The directional braking system comprises a motor, a working circuit of the motor, and a blade driven by a motor rotor, wherein a master controller is arranged in the working circuit, the master controller is provided with a braking module, a speed detecting device is arranged between the master controller and the motor rotor, the position of the blade is judged by the master controller according to the rotor speed fed back by the speed detecting device, a braking signal is sent out, and the blade is controlled by the braking module to stay in the electric tool according to the braking signal. According to the directional braking system disclosed by the utility model, the blade is enabled to stay within a safe range when the electric tool brakes, the blade is prevented from being damaged, and the use safety of the tool is improved.
Description
Technical field
The utility model relates to the brakes of electric tool.
Background technology
Electric planer is to drive the hand held electric tool that planing tool carries out planning operation by single phase series motor through driving-belt, has production efficiency height, planing surfacing, the characteristics such as smooth.Be widely used in the occasions such as building construction, house decoration, carpentry work-shop, open-air timber work and vehicle, boats and ships, bridge construction, carry out the operations such as plane planing, chamfered edge and rabbet of various timber.
Planing tool on existing most electric planer does not have the directional protection function.After electric planer uses, powered-down, planing tool stops at an arbitrary position, if the position that planing tool stops to expose in the protective outside, planing tool is subjected to colliding with of foreign object easily, causes breaks down, can not normally use, the blade that need to more renew causes direct economic loss; And very easily by blade institute gouge, there is potential safety hazard in the operator in the situation of unshielded consciousness.
Summary of the invention
Problem to be solved in the utility model just provides a kind of directed brakes of electric tool, when electric tool is braked blade is rested in the safe range, prevents breaks down and improves the safety in utilization of instrument.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of directed brakes of electric tool, comprise the operating circuit of motor, motor and the blade that is driven by rotor, be provided with main controller in the described operating circuit, described main controller is provided with brake module, be provided with speed detector between described main controller and the rotor, described main controller is judged blade position and sends brake signal that described brake module rests on electric tool inside according to described brake signal control blade according to the rotor speed of speed detector feedback.
Further, described speed detector comprises velocity sensor and single-stage magnet ring, and described velocity sensor is electrically connected to described main controller, and described single-stage magnet ring is located on the described rotor.
Further, described main controller comprises microprocessor, and described microprocessor is judged blade position and sent brake signal according to the rotor speed of speed detector feedback.
Further, described velocity sensor is Hall element.
Further, be provided with power supply in the described main controller.
Further, described brake module comprises relay group and drive circuit, and described drive circuit moves according to described brake signal control relay group.
The beneficial effects of the utility model: when the electric tool powered-down, the operating circuit of motor is disconnected, this moment, main controller was started working, blade can rotate with rotor owing to inertia, utilize speed detector detection rotor rotating speed, when rotor speed is down to the setting threshold of main controller, speed detector begins to judge blade position, when determining that blade is when the casing of electric tool is inner, main controller produces brake signal, brake module is braked according to the brake signal blade, makes blade rest on the casing inside of electric tool.Thereby prevented the damage of blade and improved the safety in utilization of instrument.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is circuit theory diagrams of the present utility model.
The specific embodiment
With reference to Fig. 1, the utility model is a kind of directed brakes of electric tool, comprise the operating circuit of motor, motor and the blade that is driven by rotor 32, be provided with main controller 1 in the described operating circuit, described main controller 1 is provided with brake module 2, be provided with speed detector between described main controller 1 and the rotor 32, described main controller 1 is judged blade position and sends brake signal that described brake module 2 rests on electric tool inside according to described brake signal control blade according to rotor 32 rotating speeds of speed detector feedback.When the electric tool powered-down, the operating circuit of motor is disconnected, this moment, main controller 1 was started working, blade is because inertia can be with rotor 32 rotations, utilize speed detector detection rotor rotating speed, when rotor speed is down to the setting threshold of main controller 1, speed detector begins to judge blade position, when determining that blade is when the casing of electric tool is inner, main controller 1 produces brake signal, brake module 2 is braked according to the brake signal blade, makes blade rest on the casing inside of electric tool.Thereby prevented the damage of blade and improved the safety in utilization of instrument.
With reference to Fig. 1, a preferred version as speed detector: the speed detector in the present embodiment comprises velocity sensor 42 and single-stage magnet ring 41, described velocity sensor 42 is electrically connected to described main controller 1, and described single-stage magnet ring 41 is located on the described rotor 32.Its principle: velocity sensor 42 is Hall element, and Hall element is a kind of Magnetic Sensor based on Hall effect, utilizes Hall element can detect magnetic field and variation thereof, therefore can be used with single-stage magnet ring 41; When the electric tool powered-down, the operating circuit of motor is disconnected, main controller 1 is started working, because single-stage magnet ring 41 is installed on the rotor 32, can together rotate with rotor 32, velocity sensor 42 detects the rotary speed of single-stage magnet ring 41, when the rotating speed of single-stage magnet ring 41 is down to the threshold value of main controller 1 setting, the threshold value of setting such as main controller 1 is 100 rev/mins, so when the rotating speed of single-stage magnet ring 41 is down to 100 rev/mins, speed detector is judged blade position according to single-stage magnet ring 41, in particular: when mounted, single-stage magnet ring 41 and blade have each self-retaining at rotor 32 installation site, when blade is positioned at the casing outside of electric tool, speed detector can't detect single-stage magnet ring 41, when blade goes to the casing inside of electric tool, speed detector detects single-stage magnet ring 41, this moment, main controller 1 transmission brake signal was to brake module 2, brake module 2 carries out the moment braking according to the brake signal blade, makes blade rest on the casing inside of electric tool.
With reference to Fig. 1, a preferred version as brake module 2: brake module 2 comprises relay group and drive circuit 21, described drive circuit 21 moves according to described brake signal control relay group, concrete: the relay group comprises relay 22 and normally-open normally-close relay 23, when operating circuit is connected, relay 22 and normally-open normally-close relay 23 reset, when operating circuit disconnects, drive circuit 21 control relays 22 and normally-open normally-close relay 23 closures, make engine commutator brush reversal connection power supply, thereby realize the moment braking, this principle general knowledge as well known to those skilled in the art is not described further.
Be provided with a switch 5 in the operating circuit of motor, when the K1 contact of switch 5 and K2 contacting, operating circuit is connected, and electric current is through switch, stator coil, the normally-closed contact of normally-open normally-close relay, rotor 324, and instrument works; When the K1 contact of switch 5 and K3 contacting, operating circuit is disconnected, and at this moment main controller 1 has the power supply input, and main controller 1 is started working.
The described electric tool of above-described embodiment is electric planer, be to drive the hand held electric tool that planing tool carries out planning operation, but the utility model carries out simple change through some, also can be used on other electric tools.
Based on above-described embodiment, other embodiments that those skilled in the art obtain by the simple change to present embodiment under the prerequisite of not making creative work all should belong to protection domain of the present utility model.
By above-described embodiment, the purpose of this utility model is by in full force and effect having reached.The personage who is familiar with this skill should be understood that the utility model includes but not limited to the content of describing in accompanying drawing and the top specific embodiment.Any modification that does not depart from function and structure principle of the present utility model all will be included in the scope of claims.
Claims (6)
1. the directed brakes of an electric tool, comprise the operating circuit of motor, motor and the blade that is driven by rotor, be provided with main controller in the described operating circuit, described main controller is provided with brake module, it is characterized in that: be provided with speed detector between described main controller and the rotor, described main controller is judged blade position and sends brake signal that described brake module rests on electric tool inside according to described brake signal control blade according to the rotor speed of speed detector feedback.
2. the directed brakes of a kind of electric tool as claimed in claim 1, it is characterized in that: described speed detector comprises velocity sensor and single-stage magnet ring, described velocity sensor is electrically connected to described main controller, and described single-stage magnet ring is located on the described rotor.
3. the directed brakes of a kind of electric tool as claimed in claim 1, it is characterized in that: described main controller comprises microprocessor, described microprocessor is judged blade position and is sent brake signal according to the rotor speed of speed detector feedback.
4. the directed brakes of a kind of electric tool as claimed in claim 2, it is characterized in that: described velocity sensor is Hall element.
5. such as the directed brakes of claim 1 or 3 described a kind of electric tools, it is characterized in that: be provided with power supply in the described main controller.
6. the directed brakes of a kind of electric tool as claimed in claim 1, it is characterized in that: described brake module comprises relay group and drive circuit, described drive circuit moves according to described brake signal control relay group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268601 CN202685013U (en) | 2012-06-05 | 2012-06-05 | Directional braking system of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268601 CN202685013U (en) | 2012-06-05 | 2012-06-05 | Directional braking system of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202685013U true CN202685013U (en) | 2013-01-23 |
Family
ID=47540680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220268601 Expired - Fee Related CN202685013U (en) | 2012-06-05 | 2012-06-05 | Directional braking system of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202685013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659788A (en) * | 2021-08-13 | 2021-11-16 | 常州隆耐电驱动技术有限公司 | Birotor permanent magnet synchronous driving motor |
-
2012
- 2012-06-05 CN CN 201220268601 patent/CN202685013U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659788A (en) * | 2021-08-13 | 2021-11-16 | 常州隆耐电驱动技术有限公司 | Birotor permanent magnet synchronous driving motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20180605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |