CN202200144U - Hand-held electric angle grinding tool - Google Patents
Hand-held electric angle grinding tool Download PDFInfo
- Publication number
- CN202200144U CN202200144U CN2011202470446U CN201120247044U CN202200144U CN 202200144 U CN202200144 U CN 202200144U CN 2011202470446 U CN2011202470446 U CN 2011202470446U CN 201120247044 U CN201120247044 U CN 201120247044U CN 202200144 U CN202200144 U CN 202200144U
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- motor
- stator
- transmission component
- threephase asynchronous
- angle grinding
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Abstract
The utility model discloses a hand-held electric angle grinding tool. The hand-held electric angle grinding tool comprises a stator shell and an electrical control unit, wherein the stator shell passes through a front cover, a middle cover, a bearing chamber and a back hood from the front part to the back part and is correspondingly divided into a transmission chamber, a motor chamber and a circuit chamber; a transmission component is arrange inside the transmission chamber; a motor is arranged inside the motor chamber; a control loop of the motor is arranged inside the circuit chamber; a power interface is arranged on the back hood; the control loop is electrically connected with a corresponding port of the power interface; a rotating shaft of the motor is connected with an output shaft of the transmission component; the output shaft of the transmission component extends out of the front cove, and a grinding wheel sheet is installed at an end part of the output shaft of the transmission component; the motor is a three-phase asynchronous motor; the electrical control unit is positioned outside the stator shell; and the electrical control unit is electrically connected with the control loop of the high-frequency three-phase asynchronous motor through the corresponding port of the power interface. The utility model also discloses a hand-held electric angle grinding tool of which the electrical control unit is arranged inside the stator shell. The hand-held electric angle grinding tool does not use a commutator and runs more reliably.
Description
Technical field
The utility model relates to a kind of hand electric milling tools, particularly relates to a kind of hand electric angle grinding machine.
Background technology
At present, electronic angle grinding machine is as worker's handheld tool commonly used, mainly is to utilize the grinding wheel etc. of the sheet type of rotation at a high speed that metal, stone material etc. is carried out grinding, cutting, rust cleaning, polishing processing.Existing angle grinding machine comprises stator case 1 ', transmission component 2 ', brush motor 3 ', ECU 4 ', grinding wheel 5 ' and power interface 6 ' shown in Fig. 1-2.Correspondence is separated into drive cavity 101 ', motor cavity 102 ' and circuit chamber 103 ' to stator case 1 ' through protecgulum 11 ', middle cover 12 ', bearing chamber 13 ' and back cover 14 ' successively from front to back; Transmission component 2 ' is set in drive cavity 101 ', brush motor 3 ' is set in motor cavity 102 ', in circuit chamber 103 ', ECU 4 ' is set.
The electronic annexation of this electronic angle grinding machine is following: ECU 4 ' forms with the control loop of brush motor 3 ' and is electrically connected; And ECU 4 ' is electrically connected through back cover 14 ' the last power interface 6 ' that is provided with and with the power supply formation that is arranged on stator case 1 ' outside; The rotating shaft of brush motor 3 ' is connected with the output shaft of transmission component 2 ', and the output shaft of transmission component 2 ' stretches out protecgulum 11 ' back and at its shaft end grinding wheel 5 ' is installed.
Wherein, Brush motor 3 ' adopts brush motor commonly used on the market; Comprise commutator 31 ', carbon brush 32 ' and brush carrier 33 ', carbon brush 32 ' is fixed on the stator case 1 ' through brush carrier 33 ', and commutator 31 ' cooperatively interacts with carbon brush 32 '; Exist the problem of commutator 31 ' serious wear, have influence on the operational reliability of brush motor 3 ' to a great extent.
The utility model content
In view of this, the purpose of the utility model is to provide absence of commutator and operation hand electric angle grinding machine more reliably.
In order to reach above-mentioned purpose, one of solution of the utility model is:
A kind of hand electric angle grinding machine comprises stator case and ECU, and correspondence is separated into drive cavity, motor cavity and circuit chamber to this stator case through protecgulum, middle cover, bearing chamber and back cover successively from front to back; This drive cavity is provided with transmission component, is provided with motor in this motor cavity, is provided with the control loop of this motor in this circuit chamber; This back cover is provided with power interface; This control loop is electrically connected with the corresponding port of this power interface; The rotating shaft of this motor is connected with the output shaft of this transmission component; This output shaft of this transmission component stretches out behind this protecgulum and at its shaft end installs this grinding wheel; Wherein: said motor is a threephase asynchronous machine, and said ECU is positioned at outside the said stator case, and said ECU is electrically connected with the said control loop of this threephase asynchronous machine through the corresponding port of said power interface.
Said motor is the threephase asynchronous machine of high frequency.
The threephase asynchronous machine of said high frequency comprises the stator and the rotor of frequency converter and corresponding configuration, and this stator is made up of a plurality of windings, and this rotor is a cage rotor, and this frequency converter is electrically connected with the corresponding end of this stator.
Two of the solution of the utility model is:
A kind of hand electric angle grinding machine comprises stator case and ECU, and correspondence is separated into drive cavity, motor cavity and circuit chamber to this stator case through protecgulum, middle cover, bearing chamber and back cover successively from front to back; This drive cavity is provided with transmission component, is provided with motor in this motor cavity, is provided with the control loop of this motor in this circuit chamber; This back cover is provided with power interface; This control loop is electrically connected with the corresponding port of this power interface; The rotating shaft of this motor is connected with the output shaft of this transmission component; This output shaft of this transmission component stretches out behind this protecgulum and at its shaft end installs this grinding wheel; Wherein: said motor is a threephase asynchronous machine, and said ECU is positioned at said stator case, and said ECU is electrically connected with the said control loop of this threephase asynchronous machine.
Said motor is the threephase asynchronous machine of high frequency.
The threephase asynchronous machine of said high frequency comprises the stator and the rotor of frequency converter and corresponding configuration, and this stator is made up of a plurality of windings, and this rotor is the absence of commutator cage rotor, and this frequency converter is electrically connected with the corresponding end of this stator.
After adopting such scheme one, the utility model hand electric angle grinding machine has following beneficial effect:
One, threephase asynchronous machine adopts the frequency conversion of electronics mode, because of the non-carbonate problem of avoiding commutator wear, and does not receive the restriction of frame for movements such as brush, moves more reliable; ECU is positioned at outside the stator case, and the vibration in angle grinding machine when work can not have influence on ECU, and the operation that has further improved the angle grinding machine again is unfailing performance more;
Two, threephase asynchronous machine mainly comprises the stator and the rotor of frequency converter and corresponding configuration, and rotor is a cage rotor, and commutator is not set on it, and winding is not set yet, so the utility model does not exist the wear problem of commutator; External power source is through frequency converter and stator and rotor generation rotating excitation field; Because of stator is made up of a plurality of windings, power supply improves frequency earlier through frequency converter, and the magnetic field rotation is fast more, and the rotating speed of rotor is just fast more, can obtain can fast rotational to carry out the angle grinding machine of grinding operation.
After adopting such scheme two; The utility model hand electric angle grinding machine has following beneficial effect: threephase asynchronous machine adopts the frequency conversion of electronics mode; Because of the non-carbonate problem of avoiding commutator wear, and do not receive the restriction of frame for movements such as brush, move more reliable; ECU is arranged in the circuit chamber in the stator case, when grinding machine is worked at the angle, helps the diagonal angle grinding machine and carries out control operation.
Description of drawings
Fig. 1 is the assembling sketch map of existing angle grinding machine;
Fig. 2 is the carbon brush in the grinding machine of existing angle and the cooperation sketch map of brush carrier;
Fig. 3 is the assembling sketch map of the utility model hand electric angle grinding machine;
Fig. 4 is the structural representation of the transmission component in the grinding machine of the utility model hand electric angle;
Fig. 5 is the circuit theory sketch map of the threephase asynchronous machine of the high frequency in the utility model.
Among the figure:
Stator case 1 ' drive cavity 101 '
Motor cavity 102 ' circuit chamber 103 '
Protecgulum 11 ' middle cover 12 '
Bearing chamber 13 ' back cover 14 '
Transmission component 2 ' brush motor 3 '
Commutator 31 ' carbon brush 32 '
Brush room 33 ' electric control circuit 4 '
Grinding wheel 5 ' power interface 6 '
Protecgulum 11 middle cover 12
Bearing 24 gear wheels 25
Last fixed disk 26 lower fixed disks 27
Threephase asynchronous machine 3 rotating shafts 31
The specific embodiment
In order further to explain the technical scheme of the utility model, come the utility model is set forth in detail through specific embodiment below.
Embodiment one
Shown in Fig. 3-4, the utility model hand electric angle grinding machine comprises stator case 1, transmission component 2, threephase asynchronous machine 3, control loop 4, grinding wheel 5, power interface 6 and ECU 7.
Correspondence is separated into drive cavity 101, motor cavity 102 and circuit chamber 103 to stator case 1 through protecgulum 11, middle cover 12, bearing chamber 13 and back cover 14 successively from front to back; Transmission component 2 is set in drive cavity 101, threephase asynchronous machine 3 is set in motor cavity 102, the control loop 4 of threephase asynchronous machine 3 is set in circuit chamber 103, power interface 6 is set on back cover 14.Transmission component 2 mainly comprises pinion 22, output shaft 23 and gear wheel 25.The rotating shaft 31 of threephase asynchronous machine 3 is installed on the middle cover 12 through bearing 21, and rotating shaft 31 is stretched into drive cavity 101 backs forward and pinion 22 is installed above that.Output shaft 23 vertically is installed on the cover plate 11 through bearing 24; The gear wheel 25 that matches with pinion 22 is installed after one of them axle head upwards penetrates in the drive cavity 101 above that, and another axle head of output shaft 23 passes outside the drive cavity 101 downwards and grinding wheel 5 is installed on this shaft end.Grinding wheel 5 is installed on the output shaft 23 with lower fixed disk 27 through the last fixed disk 26 that is laminated on its upper and lower surfaces.
The electronic annexation of the utility model hand electric angle grinding machine is following: ECU 7 is positioned at stator case 1 outside; ECU 7 is electrically connected with control loop 4 formation of threephase asynchronous machine 3 through the corresponding port of power interface 6; The rotating shaft 31 of threephase asynchronous machine 3 is connected with the output shaft 23 of transmission component 2, and output shaft 23 stretches out protecgulum 11 backs and at its shaft end grinding wheel 5 is installed.
The utility model hand electric angle grinding machine mainly is to improve in electronic part, adopts the threephase asynchronous machine 3 of the characteristic with high frequency to substitute brush motor 3 '.Threephase asynchronous machine mainly is made up of motor body and driver, and this driver adopts power electronic device and integrated circuit etc., mainly is made up of power supply rectification filter circuit and DC/AC transverter (inverter circuit); Above-mentioned motor body mainly is made up of cage rotor, multipole winding stator and electric control element etc.
As shown in Figure 5, the operation principle of threephase asynchronous machine 3 is following: the rotating speed of high-frequency electric machines rotor is influenced by the speed of motor stator rotating excitation field, and the frequency that changes the stator rotating excitation field just can change the rotating speed of rotor.The threephase asynchronous machine of high frequency adds electronic type control (driver), and the frequency of control stator rotating excitation field is also feedback the rotating speed of rotor to MCU Microprocessor Control Unit and proofreaied and correct repeatedly, in the hope of reaching the mode near the direct current generator characteristic.The threephase asynchronous machine that is to say high frequency can still can be controlled rotor and keep certain rotating speed in the nominal load scope when load variations; In addition, MCU Microprocessor Control Unit can also be braked current-limiting protection to motor body.Wherein, above-mentioned driver comprises power supply unit and control part: power supply unit provides three phase mains to the motor main body, and control part is the supply frequency of conversion input on demand then.
An embodiment as the utility model; The no threephase asynchronous machine 3 of high frequency mainly comprises the stator and the rotor of frequency converter and corresponding configuration; This stator is made up of a plurality of windings, and this rotor is a squirrel-cage, on this rotor commutator is not set; Winding is not set yet, and this frequency converter forms with the corresponding end of this stator and is electrically connected; External power source is through this frequency converter and this stator and this rotor generation rotating excitation field; Power supply improves frequency earlier through this frequency converter, and the magnetic field rotation is fast more, and rotating speed is fast more.
Threephase asynchronous machine 3 is a three-phase; Stator is formed by a plurality of silicon steel plate stackings, axial punch; Be provided with the winding of being made up of coil in each jet-bedding, each winding is made up of a plurality of inner steel discs that combine in a certain way, and winding is formed magnetic pole around being distributed in stator; Threephase asynchronous machine 3 adopts the frequency conversion of electronics mode, and rotor is gyrated.
Current rectifying and wave filtering circuit carries out rectification with power frequency supply, behind the flat ripple of middle DC link, for inverter circuit and control circuit required power supply is provided.In order to reduce the fluctuation of voltage and current, adopt filter circuit to play filtering is carried out in the output of rectification circuit.
The DC/AC transverter (drive circuit) that MCU Microprocessor Control Unit control Q0-Q6 forms is threephase asynchronous machine 3 energisings with the certain time sequence, different according to electric moter voltage and electric current, and Q0-Q6 can use the bipolarity triode; Under the effect of microprocessor control circuit; Through 6 switching device conductings, cut-out; Just obtain the 3 cross streams output that frequency and voltage can regulate, power supply drives to motor stator winding, detects the voltage, electric current of main circuit etc. simultaneously; Protect when unusual or control overload or overvoltage etc. take place, prevent the damage of inverter circuit and motor effectively.Adopt frequency modulation(PFM) to carry out speed governing,, make load-carrying motor realize startup, stall, counter-rotating operation, frequency conversion for motor provides torque capacity.
In the present embodiment, threephase asynchronous machine 3 adopts the frequency conversions of electronics mode, and is non-carbonate and have the characteristic that does not produce spark, is particularly suitable for explosive place, and the rotating speed of threephase asynchronous machine 3 is high, do not receive the restriction of frame for movements such as brush, and electromagnetic noise is low; Threephase asynchronous machine 3 adopts FM signal; Its entrained packets of information is contained among the change of frequency, is not among the amplitude, and the interference effect of disturbing wave then mainly shows among the amplitude; So the antijamming capability of the utility model is strong, has the characteristic that does not have radio interference; Threephase asynchronous machine 3 is with autocontrol operation, so can be under frequency control on rotor, do not add the startup winding in addition the synchronous motor of heavy load starting, also can when load changing, not produce and vibrate and step-out, thereby have the strong characteristic of anti-overload ability.
Embodiment two
The main distinction of present embodiment and embodiment one is the position that is provided with of ECU, and in the present embodiment, ECU is positioned at stator case, and ECU is electrically connected with the control loop of high-frequency electric machines through corresponding port.
The product form and the style of the foregoing description and accompanying drawing and non-limiting the utility model, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the patent category of the utility model to its suitable variation or modification of doing.
Claims (6)
1. a hand electric angle grinding machine comprises stator case and ECU, and correspondence is separated into drive cavity, motor cavity and circuit chamber to this stator case through protecgulum, middle cover, bearing chamber and back cover successively from front to back; This drive cavity is provided with transmission component, is provided with motor in this motor cavity, is provided with the control loop of this motor in this circuit chamber; This back cover is provided with power interface; This control loop is electrically connected with the corresponding port of this power interface; The rotating shaft of this motor is connected with the output shaft of this transmission component; This output shaft of this transmission component stretches out behind this protecgulum and at its shaft end installs this grinding wheel; It is characterized in that: said motor is a threephase asynchronous machine, and said ECU is positioned at outside the said stator case, and said ECU is electrically connected with the said control loop of this threephase asynchronous machine through the corresponding port of said power interface.
2. hand electric as claimed in claim 1 angle grinding machine is characterized in that: said motor is the threephase asynchronous machine of high frequency.
3. hand electric as claimed in claim 2 angle grinding machine; It is characterized in that: the threephase asynchronous machine of said high frequency comprises the stator and the rotor of frequency converter and corresponding configuration; This stator is made up of a plurality of windings, and this rotor is a cage rotor, and this frequency converter is electrically connected with the corresponding end of this stator.
4. a hand electric angle grinding machine comprises stator case and ECU, and correspondence is separated into drive cavity, motor cavity and circuit chamber to this stator case through protecgulum, middle cover, bearing chamber and back cover successively from front to back; This drive cavity is provided with transmission component, is provided with motor in this motor cavity, is provided with the control loop of this motor in this circuit chamber; This back cover is provided with power interface; This control loop is electrically connected with the corresponding port of this power interface; The rotating shaft of this motor is connected with the output shaft of this transmission component; This output shaft of this transmission component stretches out behind this protecgulum and at its shaft end installs this grinding wheel; It is characterized in that: said motor is a threephase asynchronous machine, and said ECU is positioned at said stator case, and said ECU is electrically connected with the said control loop of this threephase asynchronous machine.
5. hand electric as claimed in claim 4 angle grinding machine is characterized in that: said motor is the threephase asynchronous machine of high frequency.
6. hand electric as claimed in claim 5 angle grinding machine; It is characterized in that: the threephase asynchronous machine of said high frequency comprises the stator and the rotor of frequency converter and corresponding configuration; This stator is made up of a plurality of windings; This rotor is the absence of commutator cage rotor, and this frequency converter is electrically connected with the corresponding end of this stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202470446U CN202200144U (en) | 2011-07-13 | 2011-07-13 | Hand-held electric angle grinding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202470446U CN202200144U (en) | 2011-07-13 | 2011-07-13 | Hand-held electric angle grinding tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202200144U true CN202200144U (en) | 2012-04-25 |
Family
ID=45964281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202470446U Expired - Fee Related CN202200144U (en) | 2011-07-13 | 2011-07-13 | Hand-held electric angle grinding tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202200144U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240953A (en) * | 2011-07-13 | 2011-11-16 | 福建惠安县坚固电机有限公司 | Handheld electric angle grinder |
| CN102801254A (en) * | 2012-09-07 | 2012-11-28 | 东莞市神煜机械有限公司 | Energy-saving motor for hydraulic pump drive |
| CN103775563A (en) * | 2012-10-24 | 2014-05-07 | 江苏铁锚工具有限公司 | Speed change mechanism of angle grinder |
| CN108406529A (en) * | 2018-04-16 | 2018-08-17 | 佛山市捷亚塑料五金制品有限公司 | A kind of hardware polishing machine |
-
2011
- 2011-07-13 CN CN2011202470446U patent/CN202200144U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240953A (en) * | 2011-07-13 | 2011-11-16 | 福建惠安县坚固电机有限公司 | Handheld electric angle grinder |
| CN102801254A (en) * | 2012-09-07 | 2012-11-28 | 东莞市神煜机械有限公司 | Energy-saving motor for hydraulic pump drive |
| CN103775563A (en) * | 2012-10-24 | 2014-05-07 | 江苏铁锚工具有限公司 | Speed change mechanism of angle grinder |
| CN108406529A (en) * | 2018-04-16 | 2018-08-17 | 佛山市捷亚塑料五金制品有限公司 | A kind of hardware polishing machine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20190713 |