CN202840894U - Handheld outside-rotor brushless electric tool - Google Patents
Handheld outside-rotor brushless electric tool Download PDFInfo
- Publication number
- CN202840894U CN202840894U CN2012205320337U CN201220532033U CN202840894U CN 202840894 U CN202840894 U CN 202840894U CN 2012205320337 U CN2012205320337 U CN 2012205320337U CN 201220532033 U CN201220532033 U CN 201220532033U CN 202840894 U CN202840894 U CN 202840894U
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- rotor
- electric tool
- circuit
- motor
- brushless electric
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Abstract
A handheld outside-rotor brushless electric tool comprises a shell and an operating head, a groove is arranged at the side end of the shell, the groove is connected with the operating head to form a ventilating chamber, an accommodating chamber is arranged on the other side of the shell, a brushless motor is arranged in the ventilating chamber and comprises a cylindrical rotor with an opening, a stator arranged in the opening of the rotor, a motor base and a magnet, a rotor spindle integrally connected to the rotor is arranged in the middle of the opening of the rotor, the motor base is arranged between the rotor spindle and the stator and is connected with the rotor spindle through a bearing, the stator is fixed to the motor base, the magnet is fixed to the inner side wall of the rotor, an electronic speed regulator is arranged in the accommodating chamber of the shell and is connected to the brushless motor. The handheld outside-rotor brushless electric tool adopts the mode that the rotor is arranged outside the stator, the mode enables torsion force generated by the motor is larger than that of before, and power output characteristics of the mode can adapt to various use habits of workers.
Description
Technical field
The utility model relates to a kind of electric tool, refers to specifically hand-hold type external rotor brushless electric tool.
Background technology
There is the problem of the easy loss of brush in traditional brush electric tool that has, and brushless electric tool has structurally adopted the brushless design, therefore has the brush electric tool more durable than tradition.But present brushless electric tool has the brush electric tool to have difference with tradition on operating characteristic, and some used tradition to have the workman of brush electric tool to need a laundering period when using brushless electric tool.
The electric motor structure that existing electric tool adopts be stator in the outside, rotor is in the inboard, magnet is attached to the outer surface of rotor, by the rotation of rotor, and then produces power, it is little that this motor exists torsion, volume is large, the shortcoming such as be not durable and heavier.
The utility model content
The utility model provides hand-hold type external rotor brushless electric tool, and its main purpose is to solve the problems referred to above that prior art exists.
The technical solution of the utility model is as follows:
Hand-hold type external rotor brushless electric tool, include shell and working head, the side of described shell is provided with groove, described groove and working head are connected to form a ventilation housing, the opposite side of described shell is provided with container cavity, be provided with brushless motor in the described ventilation housing, described brushless motor comprises the rotor of the column type of establishing opening, be located at the stator in the rotor openings, motor cabinet and magnet, the middle part of described rotor openings is provided with the armature spindle that one is connected in rotor, described motor cabinet is located between armature spindle and the stator, described motor cabinet is connected by bearing with armature spindle, described stator is fixed in motor cabinet, described magnet is fixed in the madial wall of rotor, is provided with electron speed regulator in the container cavity of described shell, and described electron speed regulator is connected in brushless motor.
Described magnet is Nd-Fe-B permanent magnet.
Described rotor openings towards with outer casing groove towards identical, described armature spindle extends to the rotor outside and is connected in working head.
As improvement of the present utility model, described rotor openings place is provided with one can be with the sealing bearing of its sealing, and this sealing bearing is fixed on the motor cabinet.
Described electron speed regulator comprises power line, rectification circuit, filter circuit, voltage stabilizing circuit, microprocessor and the switching circuit that connects successively, and described switching circuit is connected in brushless motor.
Described electron speed regulator also includes back-emf sensing circuit, and this circuit is connected to voltage stabilizing circuit, microprocessor and brushless motor.
Described filter circuit also is connected in switching circuit.
Described electron speed regulator also includes over-current detection circuit, and described over-current detection circuit is connected in switching circuit.
Also include and be provided with key switch, described key switch is connected in microprocessor, and this switch runs through shell and extends to the shell outside.
Be compared with existing technology to description of the present utility model as can be known by above-mentioned, the utility model has the advantage of:
One, the utility model adopts stator interior, and rotor mode outside is proven, the torsion that the motor of this mode produces than before large, and the power producing characteristics of this mode can adapt to the various use habits of workman.
Two, the utility model electron speed regulator has adopted over-current detection circuit, and its effect is protection; When circuit moved, over-current detection circuit Real-Time Monitoring running current when electric current surpasses rated current, with the driving of quick break switch circuit to motor, was avoided the damage of circuit and motor.
Three, the utility model electron speed regulator has adopted back-emf sensing circuit, for detection of rotor-position; When motor operation, the voltage that ceaselessly compares motor three-phase winding terminal, when the current potential of certain phase equates with three-phase neutral point current potential, just send a signal to microprocessor, after microprocessor is obtained the rotor-position signal of motor, calculate the switching sequence of six power tubes of full-bridge driving in the switching circuit, the 5 output pulses of control switch circuit, drive the permanent-magnetic outer rotor brushless motor and rotate, guarantee the normal operation of electron speed regulator.
Four, the utility model design is unique, and is novel, has little, the lightweight advantage such as durable of volume, therefore the utlity model has wide market prospects.
Description of drawings
Fig. 1 is cutaway view of the present utility model.
Fig. 2 is the cutaway view of motor of the present utility model.
Fig. 3 is that the utility model is the theory diagram of electron speed regulator.
Embodiment
As shown in Figure 1, hand-hold type external rotor brushless electric tool, include shell 1 and working head 2, the side of shell 1 is provided with groove 11, groove 11 is connected to form a ventilation housing 12 with working head 2, and the opposite side of shell 1 is provided with container cavity 13, is provided with electron speed regulator 3 in the container cavity 13, be provided with brushless motor 4 in the ventilation housing 12, electron speed regulator 3 is connected in brushless motor 4.
As shown in Figures 1 and 2, brushless motor 4 comprise the column type of establishing opening 411 rotor 41, be located at stator 42, motor cabinet 43 and magnet 44 in rotor 41 openings 411, magnet 44 is Nd-Fe-B permanent magnet 44; The middle part of rotor 41 openings 411 is provided with the armature spindle 412 that one is connected in rotor 41, motor cabinet 43 is located between armature spindle 412 and the stator 42, motor cabinet 43 is connected by bearing 45 with armature spindle 412, stator 42 is fixed in motor cabinet 43, magnet 44 is fixed in the madial wall of rotor 41, rotor 41 openings 411 towards with shell 1 groove 11 towards identical, armature spindle 412 extends to rotor 41 outsides and is connected in working head 2.Also rotor can be arranged to astomous form, establish a sealing bearing it is sealed, the sealing bearing is fixed on the motor cabinet 43, and the opening part structure of this imperforation rotor is more firm, and is not fragile.
As shown in Figure 3, electron speed regulator 3 comprises power line 31, rectification circuit 32, filter circuit 33, voltage stabilizing circuit 34, microprocessor 35 and the switching circuit 36 that connects successively, also include over-current detection circuit 37, back-emf sensing circuit 38 and key switch 39, over-current detection circuit 37 is connected in switching circuit 36, and back-emf sensing circuit 38 is connected to voltage stabilizing circuit 34, microprocessor 35 and brushless motor 4.Switching circuit 36 is connected in brushless motor 4.Filter circuit 33 also is connected in switching circuit 36.Key switch 39 is connected in microprocessor 35, and this switch 39 runs through shell 1 and extends to shell 1 outside.
The 220v AC power is by rectification circuit 32 wave circuit 33 rear output DC sources after filtration again, one tunnel direct switching circuit 36, another road through voltage stabilizing circuit 34 step-downs after as microprocessor 35, back-emf sensing circuit 38, and the working power of over-current detection circuit 37.
The utility model adopts stator 42 interior, and rotor 41 mode outside is proven, the torsion that the motor 4 of this mode produces than before large, and the power producing characteristics of this mode can adapt to the various use habits of workman.
The utility model electron speed regulator 3 has adopted over-current detection circuit 37, and its effect is protection; When circuit moved, over-current detection circuit 37 Real-Time Monitoring running currents when electric current surpasses rated current, with the driving of 36 pairs of motor 4 of quick break switch circuit, were avoided the damage of circuit and motor 4.
The utility model electron speed regulator 3 has adopted back-emf sensing circuit 38, for detection of rotor 41 positions; When motor 4 running, the voltage that ceaselessly compares motor 4 three-phase winding terminals, when the current potential of certain phase becomes when equating with three-phase neutral point current potential from the back-emf state, just send a signal to microprocessor 35, microprocessor 35 is through after obtaining rotor 41 position signallings of motor 4 after calculating, calculate the switching sequence that switching circuit 36 interior full-bridges drive six power tubes, the 36 output pulses of control switch circuit, drive permanent-magnetic outer rotor brushless motor 4 and rotate, guarantee the normal operation of electron speed regulator 3.
The utility model design is unique, and is novel, has little, the lightweight advantage such as durable of volume, therefore the utlity model has wide market prospects.
Above-mentioned only is the specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection range of the present invention.
Claims (9)
1. hand-hold type external rotor brushless electric tool, include shell and working head, the side of described shell is provided with groove, described groove and working head are connected to form a ventilation housing, the opposite side of described shell is provided with container cavity, it is characterized in that: be provided with brushless motor in the described ventilation housing, described brushless motor comprises the rotor of the column type of establishing opening, be located at the stator in the rotor openings, motor cabinet and magnet, the middle part of described rotor openings is provided with the armature spindle that one is connected in rotor, described motor cabinet is located between armature spindle and the stator, described motor cabinet is connected by bearing with armature spindle, described stator is fixed in motor cabinet, described magnet is fixed in the madial wall of rotor, is provided with electron speed regulator in the container cavity of described shell, and described electron speed regulator is connected in brushless motor.
2. according to hand-hold type external rotor brushless electric tool claimed in claim 1, it is characterized in that: described magnet is Nd-Fe-B permanent magnet.
3. hand-hold type external rotor brushless electric tool according to claim 1 is characterized in that: described rotor openings towards with outer casing groove towards identical, described armature spindle extends to the rotor outside and is connected in working head.
4. hand-hold type external rotor brushless electric tool according to claim 1, it is characterized in that: described rotor openings place is provided with one can be with the sealing bearing of its sealing, and this sealing bearing is fixed on the motor cabinet.
5. hand-hold type external rotor brushless electric tool according to claim 1, it is characterized in that: described electron speed regulator comprises power line, rectification circuit, filter circuit, voltage stabilizing circuit, microprocessor and the switching circuit that connects successively, and described switching circuit is connected in brushless motor.
6. hand-hold type external rotor brushless electric tool according to claim 5, it is characterized in that: described electron speed regulator also includes back-emf sensing circuit, and this circuit is connected to voltage stabilizing circuit, microprocessor and brushless motor.
7. hand-hold type external rotor brushless electric tool according to claim 5, it is characterized in that: described filter circuit also is connected in switching circuit.
8. hand-hold type external rotor brushless electric tool according to claim 5, it is characterized in that: described electron speed regulator also includes over-current detection circuit, and described over-current detection circuit is connected in switching circuit.
9. hand-hold type external rotor brushless electric tool according to claim 1, it is characterized in that: also include and be provided with key switch, described key switch is connected in microprocessor, and this switch runs through shell and extends to the shell outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205320337U CN202840894U (en) | 2012-10-18 | 2012-10-18 | Handheld outside-rotor brushless electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205320337U CN202840894U (en) | 2012-10-18 | 2012-10-18 | Handheld outside-rotor brushless electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202840894U true CN202840894U (en) | 2013-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205320337U Expired - Fee Related CN202840894U (en) | 2012-10-18 | 2012-10-18 | Handheld outside-rotor brushless electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202840894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882341A (en) * | 2012-10-18 | 2013-01-16 | 王添辉 | Handheld brushless electric tool with outer rotor |
-
2012
- 2012-10-18 CN CN2012205320337U patent/CN202840894U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882341A (en) * | 2012-10-18 | 2013-01-16 | 王添辉 | Handheld brushless electric tool with outer rotor |
| CN102882341B (en) * | 2012-10-18 | 2015-01-07 | 王添辉 | Handheld brushless electric tool with outer rotor |
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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: 20130327 Termination date: 20151018 |
|
| EXPY | Termination of patent right or utility model |