CN201109846Y - Stepless transmission of sewing machine motor - Google Patents
Stepless transmission of sewing machine motor Download PDFInfo
- Publication number
- CN201109846Y CN201109846Y CNU2007200300213U CN200720030021U CN201109846Y CN 201109846 Y CN201109846 Y CN 201109846Y CN U2007200300213 U CNU2007200300213 U CN U2007200300213U CN 200720030021 U CN200720030021 U CN 200720030021U CN 201109846 Y CN201109846 Y CN 201109846Y
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- circuit
- sewing machine
- light
- regulating mechanism
- speed
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Abstract
The utility model relates to a stepless speed variator of a sewing machine motor, which is composed of a light transmitting circuit, a light receiving circuit, an amplifying circuit, a silicon-controlled control circuit, a full speed switch and an optical distance regulating mechanism. The light transmitting circuit is used for transmitting a light source, the light receiving circuit is used for receiving the light source, the optical distance regulating mechanism is used for regulating the distance between light transmitting and light receiving, the light receiving circuit generates a controlled potential signal under the function of the optical distance regulating mechanism, after the controlled potential signal is amplified through the amplifying circuit, the silicon-controlled control circuit is driven to output a speed adjusting signal to realize the stepless speed change to the motor, and the full speed switch ensures that the full speed running of the sewing machine motor is realized when being turned off under the function of the optical distance regulating mechanism. The stepless speed variator controls the circuit by utilizing the light intensity after the distance between the light transmitting and the light receiving is changed, to realize the steepless speed variation to the motor. The use is reliable, the service life is long, the operation is convenient, and the stepless speed variator is suitable for the speed variation of the single-phase series excitation type small-scale industrial sewing machine motor which requires the frequent speed change.
Description
Technical field
The utility model belongs to the motor speed adjusting technique field, particularly relates to a kind of electrical motor of sewing machine buncher.
Background technology
The single-phase series excitation formula motor that electrical motor of sewing machine adopted in use often needs different rotating speeds, needs the slow-speed of revolution when particularly just having started, and the existing stepping speed change of these type of arrangements for speed regulation also has the employing infinitely variable speeds.The stepping speed changing structure is simple, long service life, but can not reach arbitrary speed, particularly can not slowly quicken from zero rotating speed, and speed governing is non-linear.
The buncher of prior art changes the silicon controlled angle of flow by the adjustment potentiometer usually and reaches the speed governing purpose, but motor speed linear change, can realize the arbitrary speed in the maximum speed, it is short that but potentiometer is adjusted the life-span, can not frequently change speed, as tens times speed change per hour, obviously improper.
August 23 2006 day for announcing, notification number is that the Chinese utility model patent of CN 2808965Y discloses " a kind of motor speed control device of industrial sewing machine ", comprise base, speed governing connecting rod, sensing mechanism and motor-drive circuit, described sensing mechanism is the Hall non-contact point potentiometer, it is made up of Hall element and magnet, by changing the relative position between magnet and the Hall element, produce the magnetic field induction of different sizes, become different control signals by the motor-drive circuit treatment conversion, reach the purpose of control motor speed.It has realized the frequent speed governing that motor is level and smooth owing to eliminated direct contact and mechanical wear.But Hall element price height is disturbed by external magnetic field easily, the shielding trouble.
Summary of the invention
Goal of the invention of the present utility model is: provide a kind of simple in structure, cost is low, shielding simply and not is subjected to external interference, can overcome contact wear and loose contact simultaneously, has the buncher that is applicable to electrical motor of sewing machine of long and good linear of life-span.
The technical solution of the utility model is: a kind of electrical motor of sewing machine buncher, it is characterized in that: by optical transmission circuit, optical receiving circuit, amplifying circuit, the SCR control circuit, switch and light distance regulating mechanism are formed at full speed, described optical transmission circuit transmitting illuminant, optical receiving circuit receives light source, distance between light distance regulating mechanism adjusting light transmits and receives, optical receiving circuit produces the controlled electric potential signal under the effect of light distance regulating mechanism, amplify rear drive SCR control circuit output speed-regulating signal to electrical motor of sewing machine through amplifying circuit and realize infinitely variable speeds to motor, switch is realized the full speed running of electrical motor of sewing machine when closed under the effect of light distance regulating mechanism at full speed.
Further, described optical transmission circuit and optical receiving circuit can use infraluminescence pipe and infrared receiving tube.
Described amplifying circuit uses the high anti-pressure power pipe.
Described smooth distance regulating mechanism comprises pedal 1, magazine 4 and post spring 5, infraluminescence pipe 3 and infrared receiving tube 2 be relative be installed in light tight and the magazine 4 that can stretch up and down in.
The utility model has following advantage compared with the prior art:
1, the utility model utilizes the light distance regulating mechanism to realize adjustment to distance between infraluminescence pipe and the infrared receiving tube, variation by luminous intensity changes the infrared receiving tube impedance, reach the change current potential, and then change the technical scheme that thyristor operating angle changes motor speed, be similar to a kind of contactless linear sliding potentiometer speed regulator, owing to eliminated direct contact, frequently speed governing and contactless wearing and tearing and loose contact, use reliably, noiselessness, the life-span is long.
2, simple, the light distance regulating mechanism of circuit structure of the present utility model is skillfully constructed, and low cost of manufacture, shielding simply and not are subjected to external interference, have realized the stepless speed control of motor, have favorable linearity, and the speed governing effect stability is reliable, and energy-saving effect is obvious.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a theory structure block diagram of the present utility model;
Fig. 2 is the circuit diagram of the utility model embodiment;
Fig. 3 is the circuit diagram of another embodiment of the utility model;
Fig. 4 is the light distance regulating mechanism schematic diagram of the utility model embodiment;
Among the figure: 1-pedal, 2-infrared receiving tube, 3-infraluminescence pipe, 4-magazine, 5-post spring, 6-spring leaf switch, 7-circuit board.
The specific embodiment
In Fig. 1 theory structure block diagram of the present utility model, the electrical motor of sewing machine buncher is by optical transmission circuit, optical receiving circuit, amplifying circuit, the SCR control circuit, switch and light distance regulating mechanism are formed at full speed, optical transmission circuit transmitting illuminant wherein, optical receiving circuit receives light source, distance between light distance regulating mechanism adjusting light transmits and receives, optical receiving circuit produces the controlled electric potential signal under the effect of light distance regulating mechanism, amplify rear drive SCR control circuit output speed-regulating signal to electrical motor of sewing machine through amplifying circuit and realize infinitely variable speeds to motor, switch is realized the full speed running of electrical motor of sewing machine when closed under the effect of light distance regulating mechanism at full speed.
In the circuit diagram of Fig. 2 the utility model embodiment, optical transmission circuit is composed in series by infraluminescence pipe D3 and Zener diode D2, is connected in parallel on the two ends in the optical receiving circuit loop that infrared receiving tube T1 and resistance R 2 be composed in series; Optical receiving circuit produces the controlled electric potential signal under the effect of light distance regulating mechanism, export the amplifying circuit of forming by triode T2, resistance R 3 and capacitor C 1 to from the colelctor electrode of infrared receiving tube T1, wherein the emitter stage of amplifying triode T2 is connected to Current Negative Three-Point Capacitance resistance R 3, is parallel with at the series loop two ends of amplifying triode T2 and resistance R 3 and stablizes electric capacity C1; Behind commutation diode D4, deliver to the SCR control circuit of forming by diode D5, bidirectional trigger diode VD, controllable silicon VT and capacitor C 2 from the amplifying signal of triode T2 output, wherein control signal is connected with the trigger end of controllable silicon VT behind diode D5, bidirectional trigger diode VD, and the output output speed-regulating signal of controllable silicon VT is to electrical motor of sewing machine; The series loop that working power is formed by current-limiting resistance R1 and commutation diode D1 is optical transmission circuit and optical receiving circuit power supply, and the series loop of forming by current-limiting resistance R4 and commutation diode D4 is the amplifying circuit power supply; Working power is after-applied at series excitation formula motor D two ends through controllable silicon VT, is parallel with the full speed switch of being made up of the spring leaf K switch at the two ends of controllable silicon VT; Working power adopts the alternating current 220V mains-supplied.
In the circuit diagram of another embodiment of Fig. 3 the utility model, except that by infraluminescence pipe D3 with compose in parallel the optical transmission circuit the same Fig. 2 of other parts again with Zener diode D2 after resistance R 5 is connected.
Operation principle of the present utility model is as follows: change the distance between infraluminescence pipe D3 and the infrared receiving tube T1, luminous intensity on the infrared receiving tube T1 is changed, its impedance loop is with intensity variation, thereby the base potential of triode T2 is changed, the collector current of triode T2 changes thereupon, thereby its collector potential also changes, and also just changed the silicon controlled angle of flow, reached the purpose of electrical motor gearshift.And when needs motor high speed, only need can make the motor full speed running with spring leaf K switch excision alignment circuit.
Optical transmission circuit of the present utility model also can adopt other luminescent device, as neon bulb, bulb etc., corresponding light receiving element and adapter circuit thereof only need correspondingly be set get final product.
Because general photosensitive tube is withstand voltage all lower, power is also little, so the triode T2 of present embodiment uses the high anti-pressure power pipe, its collector potential can be between several hectovolts linear change preferably.The employing of high anti-pressure power pipe has improved the excursion of controlled electric potential, thereby has also strengthened slewing range.
The emitter stage of amplifying triode T2 is connected to Current Negative Three-Point Capacitance resistance R 3, can make being adjusted in its scope of rotating speed that better linearity is arranged, and capacitor C 1 can make motor speed stable operation under very low situation.
In the light distance regulating mechanism schematic diagram of Fig. 4 the utility model embodiment, the light distance regulating mechanism comprises pedal 1, magazine 4 and post spring 5, infraluminescence pipe 3 and infrared receiving tube 2 be installed in light tight and the magazine that can stretch up and down in.Specifically, with 1 infraluminescence pipe 3 and 1 infrared receiving tube, 2 relative being installed in the magazine 4, magazine 4 is divided into two parts up and down, and the outside is around post spring 5.When pedal 1 depressed, the first half of magazine 4 can be pressed into the latter half, and magazine 4 realizes internally adorning the light shield of infraluminescence pipe 3 and infrared receiving tube 2, and magazine 4 can also can be other shapes for columnar structured.Magazine 4 and outside column spring 5 thereof, circuit board 7 are installed in the pedal plate type speed governing box with spring leaf switch 6, foot-operated direction i.e. the direction of arrow among the figure, the power difference of stepping on along with the underfooting, post spring 5 is compressed to diverse location, luminous intensity difference on the infrared receiving tube 2, rotating speed of motor is also different, the big more rotating speed of pressure is high more, thereby in the high-speed range of half-wave operation, realize the linear stepless speed change, and when pedal is stepped on earth, spring leaf switch 6 closings of contact, alternating current 220V working power are applied directly to Sewing machines series excitation formula motor two ends, motor full speed running.
The utility model utilization changes the distance between infraluminescence pipe and the infrared receiving tube, so that infrared receiving tube is received Luminous intensity changes to have realized the stepless speed regulation to motor, has noiselessness, and the life-span is long, and easy to operate characteristics are suitable for Single-phase series excitation formula back yard industry electrical motor of sewing machine speed governing in the need busy shift.
Claims (4)
1, a kind of electrical motor of sewing machine buncher, it is characterized in that: by optical transmission circuit, optical receiving circuit, amplifying circuit, the SCR control circuit, switch and light distance regulating mechanism are formed at full speed, described optical transmission circuit transmitting illuminant, optical receiving circuit receives light source, distance between light distance regulating mechanism adjusting light transmits and receives, optical receiving circuit produces the controlled electric potential signal under the effect of light distance regulating mechanism, amplify rear drive SCR control circuit output speed-regulating signal to electrical motor of sewing machine through amplifying circuit and realize infinitely variable speeds to motor, switch is realized the full speed running of electrical motor of sewing machine when closed under the effect of light distance regulating mechanism at full speed.
2, electrical motor of sewing machine buncher according to claim 1, it is characterized in that: described optical transmission circuit and optical receiving circuit can use infraluminescence pipe and infrared receiving tube.
3, electrical motor of sewing machine buncher according to claim 1 and 2 is characterized in that: described amplifying circuit uses the high anti-pressure power pipe.
4, electrical motor of sewing machine buncher according to claim 1, it is characterized in that: described smooth distance regulating mechanism comprises pedal (1), magazine (4) and post spring (5), infraluminescence pipe (3) is relative with infrared receiving tube (2) be installed in light tight and the magazine (4) that can stretch up and down in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200300213U CN201109846Y (en) | 2007-10-31 | 2007-10-31 | Stepless transmission of sewing machine motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200300213U CN201109846Y (en) | 2007-10-31 | 2007-10-31 | Stepless transmission of sewing machine motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201109846Y true CN201109846Y (en) | 2008-09-03 |
Family
ID=39894376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200300213U Expired - Fee Related CN201109846Y (en) | 2007-10-31 | 2007-10-31 | Stepless transmission of sewing machine motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201109846Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685282A (en) * | 2015-11-05 | 2017-05-17 | 广东美的生活电器制造有限公司 | Electric appliance and motor speed regulating device thereof |
-
2007
- 2007-10-31 CN CNU2007200300213U patent/CN201109846Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685282A (en) * | 2015-11-05 | 2017-05-17 | 广东美的生活电器制造有限公司 | Electric appliance and motor speed regulating device thereof |
| CN106685282B (en) * | 2015-11-05 | 2024-01-05 | 广东美的生活电器制造有限公司 | Electric appliance and motor speed regulating device thereof |
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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: 20080903 Termination date: 20101031 |