CN2768313Y - Emery belt machine with speed regulator - Google Patents
Emery belt machine with speed regulator Download PDFInfo
- Publication number
- CN2768313Y CN2768313Y CN 200420042401 CN200420042401U CN2768313Y CN 2768313 Y CN2768313 Y CN 2768313Y CN 200420042401 CN200420042401 CN 200420042401 CN 200420042401 U CN200420042401 U CN 200420042401U CN 2768313 Y CN2768313 Y CN 2768313Y
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- speed
- motor
- emery disc
- circuit
- regulating device
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Abstract
The utility model relates to an emery disc and belt machine with a speed regulator. The interior of the emery disc and belt machine is provided with the speed regulator which can control the rotating speed change of a motor for driving an emery belt or an emery disc. The exterior of the emery disc and belt machine is provided with a speed regulating knob. The speed regulator comprises a control circuit, a current detector, a drive circuit and a conversion circuit, wherein the current detector is used for detecting a motor current which is fed back to the control circuit. The control circuit corresponds to the input of the speed regulating knob for controlling the frequency change of a square wave signal output by the drive circuit. The square wave signal is converted into an AC signal to be output to driving the motor to rotate by the conversion circuit. Thereby, the rotating speed of the emery disc and belt machine is regulated through the speed regulating knob by a user. The rotating speed condition of the motor at present can be informed to the control circuit from the detecting result of the current detector. Then, the rotating speed condition of the motor is compared with the arranged rotating speed of the speed regulating knob. Thus, whether the rotating speed condition of the motor at present accords with the arrangement of the speed regulating knob can be judged for amending the rotating speed of the motor.
Description
Technical field
The utility model is a kind of emery disc belt sander with speed regulating device, refers to a kind of rotation speed change adjustable device of emery disc belt sander especially.
Background technology
Employed organisation of working in general family or factory, the application of emery disc belt sander can be said so quite extensive, can save the cost of many hand tools and the coefficient of losses of reduction hand tool.And the emery disc belt sander is except having common abrasive belt organisation of working, be corresponding to processing in addition than large end face, the emery disc device that also has quick rotation, and on an end face of emery disc, be equipped with emery cloth or sand paper, and be provided with a sand plate table corresponding to the end face of emery disc tool emery cloth.
Therefore the external form that the emery disc belt sander can corresponding object is selected to come ground-parallel by abrasive band or emery disc, yet the velocity of rotation with existing emery disc belt sander mostly is fixed speed greatly, the end face mill of various items is cut and is all operated in fixing rotating speed, and the selection of multiple speed can't be provided, cut with the mill of the different objects of correspondence.
Summary of the invention
A purpose of the present utility model is to provide a kind of emery disc belt sander with speed regulating device, makes the rotation speed change of emery disc belt sander to adjust.
Another purpose of the utility model is to provide a kind of emery disc belt sander with speed regulating device, makes that the control of motor rotary speed can be more accurate.
In order to reach above-mentioned purpose, the utility model provides a kind of emery disc belt sander with speed regulating device, is provided with the motor rotary speed of speed regulating device with control emery disc belt sander, and these speed regulating device comprise: one drive circuit, in order to produce square-wave signal; One change-over circuit, it couples drive circuit, is used for receiving square-wave signal, and utilizes square-wave signal to switch the speed controling signal of CD-ROM drive motor; One current detector, it is coupled to motor, is used for feeding back the electric current of motor; One speed governing knob is in order to produce a speed-regulating signal; And a control circuit, it couples between drive circuit and the speed governing knob, in order to the rotating speed of control motor; Wherein control circuit is in response to the speed-regulating signal of speed governing knob, the frequency change of square-wave signal that control Driver Circuit produces, and the speed controling signal of change-over circuit output can be adjusted relatively with the frequency change of square-wave signal, the rotating speed of motor can be adjusted, and control circuit can judge whether the rotating speed of motor meets the speed governing knob and set from current detector, to revise the frequency change of square-wave signal that drive circuit is produced.
This drive circuit be preferably sinusoid pulse width modulation signal generator (Sinusoidal Pulse WidthModulation, SPWM).
This change-over circuit is preferably the half-bridge converter.
This current detector is preferably current transformer.
This speed governing knob is preferably potentiometer.
Therefore, the effect of specifically reaching of the present utility model is:
A kind of emery disc belt sander with speed regulating device is provided, makes the rotation speed change of emery disc belt sander to adjust, simultaneously, make that the control of motor rotary speed can be more accurate.
The accompanying drawing summary
Fig. 1 is the schematic appearance of the utility model preferred embodiment.
Fig. 2 is the circuit diagram of the utility model preferred embodiment speed regulating device.
Embodiment
See also Fig. 1, it is the schematic appearance of the utility model preferred embodiment.Board 1 shown in the figure is the emery disc belt sander, because the mechanism that provides rotating speed adjustable whole is provided traditional emery disc belt sander, therefore the utility model is set up speed regulating device 20 in board 1 inside especially, and be used for driving the rotation speed change of the motor 12 of abrasive band or emery disc by speed regulating device 20 control, and be provided with speed governing knob 10 in board 1 outside, the user can give speed regulating device 20 to assign speed-regulating signal via controlling speed governing knob 10, makes motor 12 rotating speeds can meet user's requirement.
See also Fig. 2, it is the circuit diagram of the utility model most preferred embodiment speed regulating device.Speed regulating device 20 mainly include a voltage-multiplying circuit 21, a current detector 22, a change-over circuit 23, a control circuit 25 and one drive circuit 26.
Wherein voltage-multiplying circuit 21 changes into direct current signal output with the AC signal of input, and required power supply when change-over circuit 23 actions mainly are provided can rotate smoothly with CD-ROM drive motor 12.
And current detector 22 is coupled to motor 12 input terminal loops, it mainly acts on is that the electric current that detects motor 12 changes, and with current feedback to control circuit 25, by detecting the variation of motor 12 electric currents, can reflect the operating state of motor 12 for control circuit 25.Current detector 22 is preferably current transformer (Current Transformer) in the present embodiment, utilize the characteristic of converter components the big current conversion of motor 12 can be the relative voltage signal for control circuit 25 judgements, wherein the primary side of current transformer is coupled to the loop between voltage-multiplying circuit 21 and the motor 12, and the secondary side output terminal of current transformer is coupled with full-wave rectifier 24.Full-wave rectifier 24 can change into the AC signal of current transformer output direct current signal and give control circuit 25.
And the circuit that control circuit 25 in the present embodiment is made up of single-chip, to carry out the rotating speed adjustment of motor 12.And single-chip provides programming operations in firmware (Firmware) mode, therefore the rotating speed adjustment of motor 12 is by the program code decision of single-chip institute burning, and assign the order that rotating speed adjusts in this way and give drive circuit 26, and cooperate follow-up change-over circuit 23 to change the operating voltage of motors 12 and power frequency to make the motor 12 can be so that level or the stepless rotation speed change of doing to be arranged.
And drive circuit 26 is coupled between control circuit 25 and the change-over circuit 23, mainly produces square-wave signal and exports to change-over circuit 23.And drive circuit 26 the bests are sinusoid pulse width modulation signal generator (Sinusoidal Pulse Width Modulation in the present embodiment, SPWM), decide the square-wave signal of output pulse width modulating signal by the sinusoidal reference ripple (Reference Wave) and the intersection point of the comparison gained of triangular carrier (Carrier Wave).
Change-over circuit 23 is coupled between drive circuit 26 and the motor 12.Change-over circuit 23 converts the direct voltage of input the AC signal (being speed controling signal) of output to CD-ROM drive motor 12 rotations.Change-over circuit 23 is the half-bridge converter in this enforcement, and change-over circuit 23 switch inside elements (Q1, Q2) cooperate the input of pulse width modulation signal, AC signal and export to motor 12 to switch.
Therefore the output frequency of change-over circuit 23 just is the frequency change that is controlled in string wave impulse width modulation signal.That is to say string wave impulse width modulation signal under fixed frequency, the output frequency of change-over circuit 23 keeps certain value.And, cause the lifting or the decline of change-over circuit 23 output frequencies relatively by improving or reduce the frequency of pulse width modulation signal, and can change the operating frequency of motor 12 thus, make the rotating speed of motor 12 can the Be Controlled adjustment.
Adjust the rotation speed change of motor 12 from a kind of loop circuit control mode that above explanation the utility model provides.Current detector 22 wherein is with feedback system the electric current of motor 12 to be changed to inform control circuit 25, makes control circuit 25 can learn the rotating speed of present motor 12 whether to meet setting with the rotating speed of judging motor 12 by motor 12 feedback currents.Control circuit 25 also can change the frequency change of string wave impulse width modulation signal in response to the speed-regulating signal that speed governing knob 10 is imported to drive circuit 26 to issue an order, make change-over circuit 23 change the operating voltage of motor 12 relatively in response to the string wave impulse width modulation signal input after changing, therefore the have level or the stepless rotating speed adjustment of motor 12 realize.
Because control circuit 25 of the present utility model is formed with single-chip circuit, the flow process of controlling of sequencing is provided, have preferred application elasticity.Therefore the utility model provides rotation speed change that the emery disc belt sander with speed regulating device can allow the emery disc belt sander flexible level or stepless the switching be arranged to have more, and the precision that is applicable to the unlike material object is ground and cut.And the emery disc belt sander operate in low frequency variations decide torque the time, when if rotating speed is slack-off (can learn) by the testing result of current detector 22, then can by control circuit 25 improve export to motor 12 operating frequency to keep the function of deciding rotating speed, can avoid the saturated of motor 12.
And the emery disc belt sander more can operate in the state that arbitrary frequency starts, and be that first operating voltage and current amplitude with motor 12 improves with starter 12 when with low-frequency start, and when motor 12 electric currents descend, (detect by current detector 22 equally and learn), promptly adjust string wave impulse width modulation signal to the frequency that sets, with the rotating speed (being the setting of speed governing knob) of keeping requirement.And when the abrasive band of emery disc belt sander or emery disc during in arbitrary frequency run; if because of mill is cut or other factors when blocking (can be learnt by the testing result of current detector 22); control circuit 25 can be set a guard time and monitor; if the time that blocks surpasses guard time; control circuit 25 can be issued an order to stop motor 12 runnings; and if the time that blocks does not surpass guard time, 25 of control circuits restart motor 12 runnings.
The utility model is incorporated into the inside of emery disc belt sander with speed regulating device 20, and by the rotation speed change of speed regulating device 20 control emery disc belt sanders, this technological means real head that belongs in the field of emery disc belt sander sees.And the speed regulating device in the utility model 20 are to belong to the loop circuit control system, rotating speed that can more accurate control motor 12, and can detect the operating state of motor 12 by current detector 22 at any time, and judge thus by control circuit 25 whether motor 12 rotating speeds normally need to adjust.Be to be provided with speed governing knob 10 can allow the user set up rotating speed on their own in emery disc belt sander outside in addition, and the speed-regulating signal input back that control circuit 25 can be received speed governing knob 10 in response to the rotating speed of adjusting motor 12 to setting speed, speed governing knob 10 the bests of present embodiment can be potentiometer (potentiometer).
Claims (9)
1, a kind of emery disc belt sander with speed regulating device comprises a board, it is characterized in that: speed regulating device are set in board, and these speed regulating device comprise one in order to produce the drive circuit of square-wave signal; One couples this drive circuit, is used for receiving this square-wave signal and utilizes this square-wave signal to switch the change-over circuit of the speed controling signal that CD-ROM drive motor; One is coupled to this motor, is used for feeding back the current detector of the electric current of this motor; One in order to produce the speed governing knob of a speed-regulating signal; One couples between this drive circuit and this speed governing knob, in order to the control circuit of the rotating speed of controlling this motor.
2, the emery disc belt sander with speed regulating device as claimed in claim 1 is characterized in that: this drive circuit is to be sinusoid pulse width modulation signal generator.
3, the emery disc belt sander with speed regulating device as claimed in claim 1, it is characterized in that: this change-over circuit is the half-bridge converter.
4, the emery disc belt sander with speed regulating device as claimed in claim 1, it is characterized in that: this current detector is a current transformer.
5, the emery disc belt sander with speed regulating device as claimed in claim 1, it is characterized in that: this speed governing knob is a potentiometer.
6, the emery disc belt sander with speed regulating device as claimed in claim 1, it is characterized in that: this control circuit is the circuit that single-chip constitutes.
7, the emery disc belt sander with speed regulating device as claimed in claim 1, it is characterized in that: this current detector is coupled to this motor and this control circuit, to form loop circuit control.
8, the emery disc belt sander with speed regulating device as claimed in claim 1 is characterized in that: more comprise the voltage-multiplying circuit that is coupled to this change-over circuit.
9, the emery disc belt sander with speed regulating device as claimed in claim 1 more comprises the full-wave rectifier that is coupled between this current detector and this control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042401 CN2768313Y (en) | 2004-04-08 | 2004-04-08 | Emery belt machine with speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042401 CN2768313Y (en) | 2004-04-08 | 2004-04-08 | Emery belt machine with speed regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2768313Y true CN2768313Y (en) | 2006-03-29 |
Family
ID=36682182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420042401 Expired - Fee Related CN2768313Y (en) | 2004-04-08 | 2004-04-08 | Emery belt machine with speed regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2768313Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355823A (en) * | 2020-10-14 | 2021-02-12 | 文登奥文电机有限公司 | Novel abrasive belt sand table machine |
-
2004
- 2004-04-08 CN CN 200420042401 patent/CN2768313Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355823A (en) * | 2020-10-14 | 2021-02-12 | 文登奥文电机有限公司 | Novel abrasive belt sand table machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060329 Termination date: 20100408 |