CN208867074U - A kind of brushless servo electric screw driver - Google Patents
A kind of brushless servo electric screw driver Download PDFInfo
- Publication number
- CN208867074U CN208867074U CN201821107106.1U CN201821107106U CN208867074U CN 208867074 U CN208867074 U CN 208867074U CN 201821107106 U CN201821107106 U CN 201821107106U CN 208867074 U CN208867074 U CN 208867074U
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- CN
- China
- Prior art keywords
- screw driver
- electric screw
- port
- brushless servo
- servo electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of brushless servo electric screw drivers, including electric screw driver and brushless servo electric screw driver controller, electric wire connects between the electric screw driver and brushless servo electric screw driver controller, and the both ends of electric wire are that aviation plugs connector, aviation plug connector connects electric screw driver and brushless servo electric screw driver controller respectively, platinum resistance elements are equipped in the electric screw driver, there is torque compensation circuit in brushless servo electric screw driver controller, platinum resistance elements and torque compensation circuit are electrically connected, pass through the temperature resistance characteristic of platinum resistance elements, the operating current of motor is compensated, to realize the compensation to motor operation torque.
Description
Technical field
The utility model relates to a kind of electric screw driver more particularly to a kind of brushless servo electric screw drivers.
Background technique
Electric screw driver is used to tighten and unscrew the electric tool of screw, is mainly used on assembly line, improves work effect
While rate, save strength, the electric screw driver working time is too long, in the prior art, motor during the work time, with the time
Passage, motor internal coil windings temperature can be gradually increasing, and operating current is bigger, and winding heating is faster, and winding temperature increases,
Impedance increases, and electric screw driver torque can decline, and electric screw driver increases torque by electromagnetic clutch type at present, and structure is complicated,
Precision is lower, and maintenance cost is high.
Utility model content
The utility model is exactly in view of the deficienciess of the prior art, provide a kind of brushless servo electric screw driver.
To solve the above problems, technical solution adopted in the utility model is as follows:
A kind of brushless servo electric screw driver, including electric screw driver and brushless servo electric screw driver controller, it is described
Electric wire connects between electric screw driver and brushless servo electric screw driver controller, and the both ends of electric wire are connection-peg, connection-peg
Grafting electric screw driver and brushless servo electric screw driver controller respectively, the electric screw driver is interior to be equipped with platinum resistance member
Part, brushless servo electric screw driver is interior to be equipped with torque compensation circuit, and platinum resistance elements and torque compensation circuit are electrically connected, institute
State torque compensation circuit, including amplifier, power supply, first resistor, second resistance, 3rd resistor, thermistor, capacitor, volume
Process control unit and output end, the amplifier are semiconductor element, and amplifier is equipped with eight ports, first port and the 4th end
Mouth electrically connects, and second port, thermistor, first resistor, power end, which are sequentially connected in series, to be electrically connected, and third port is connected to temperature-sensitive electricity
Between resistance and first resistor, fifth port is electrically connected with second resistance one end, and the 6th port is electrically connected with 3rd resistor one end, the
The two resistance other ends electrically connect between the 6th port and 3rd resistor, and the 7th port is electrically connected with output end, and 3rd resistor is another
One end electrically connects between the 7th port and output end, and tie point electrically connects programming Control unit, the 8th port and power supply electricity
Connection, wherein the first, second resistance constitutes feed circuit in the same direction.
Further, the programming Control unit includes AD sample circuit, and programming Control unit and motor driver are electric
Connection.
Further, it is grounded respectively between the first port and the 4th port, second port and thermistor.
Further, reference potential is connected between fifth port and second resistance.
Further, it is connected with capacitor between the 8th port and power supply, capacitor connects electricity.
Further, the screwdriver includes shell, and connected motor and output main shaft are equipped in shell, exports main shaft
One end is stretched out outside shell and is connected with batch nozzle, and the platinum resistance elements are mounted on motor case surface.
Compared with prior art, the implementation result of the utility model is as follows:
The utility model passes through the temperature resistance characteristic of platinum resistance elements, compensates to the electric current in circuit, thus
It realizes under constant voltage, the compensation to motor operation torque, guarantees the stability of motor work.
Detailed description of the invention
Fig. 1 is the utility model structure；
Fig. 2 is a kind of brushless electric screwdriver sectional structure chart described in the utility model.
Fig. 3 is a kind of brushless electric screwdriver torque compensation electrical block diagram described in the utility model；
Specific embodiment
Illustrate the content of the utility model below in conjunction with specific embodiments.
As shown in Figure 1, Figure 2 and Figure 3, a kind of brushless servo electric screw driver, including electric screw driver 100 and brushless servo
Electric screw driver controller 200, electric wire connects between the electric screw driver 100 and brushless servo electric screw driver controller 200
It connects, and the both ends of electric wire are connection-peg, connection-peg distinguishes grafting electric screw driver 100 and brushless servo electric screw driver controller
200, the electric screw driver is interior to be equipped with platinum resistance elements 101, and platinum resistance elements 101 are thermistor, brushless servo electricity
Torque compensation circuit 201 is equipped in dynamic screw driver controller 200, platinum resistance elements 101 electrically connect with torque compensation circuit 201
It connects, the torque compensation circuit 201, including amplifier 202, power supply 203, first resistor 204, second resistance 205,3rd resistor
206, platinum resistance elements 101, programming Control unit 207 and output end 208, the amplifier 202 are semiconductor element, amplification
Device 202 is equipped with eight ports, and first port is electrically connected with the 4th port, second port, platinum resistance elements 101, first resistor
204,203 end of power supply, which is sequentially connected in series, electrically connects, and third port is connected between platinum resistance elements 101 and first resistor 204, the
Five ports are electrically connected with 205 one end of second resistance, and the 6th port is electrically connected with 206 one end of 3rd resistor, and second resistance 205 is another
End electrically connects between the 6th port and 3rd resistor 206, and the 7th port is electrically connected with output end 208, and 3rd resistor 206 is another
End electrically connects between the 7th port and output end 208, and tie point electrically connects programming Control unit 207, the 8th port and electricity
Source 203 electrically connects.The programming Control unit 207 includes AD sample circuit, and programming Control unit 207 and motor driver are electric
Connection.It is grounded respectively between the first port and the 4th port, second port and platinum resistance elements 101.Fifth port with
Reference potential is connected between second resistance 205.Capacitor 209, capacitor are connected between 8th port and power supply 203
209 connect electricity.The electric screw driver 100 includes shell 102, and connected motor 103 and output main shaft are equipped in shell 102
104, output 104 one end of main shaft is stretched out outside shell 102 and is connected with batch nozzle 105, and the platinum resistance elements 101 are mounted on electronic
Casing surface.
It is as shown in the table a certain motor model winding temperature and the torque table of comparisons:
| Operating voltage (V) | Winding temperature (DEG C) | Output torque (mNm) | Operating voltage (V) | Winding temperature (DEG C) | Output torque (mNm) | |
| 24 | 22 | 96 | 24 | 74 | 88 | |
| 24 | 26 | 96 | 24 | 78 | 87 | |
| 24 | 30 | 95 | 24 | 82 | 86 | |
| 24 | 34 | 95 | 24 | 86 | 85 | |
| 24 | 38 | 94 | 24 | 90 | 83 | |
| 24 | 42 | 93 | 24 | 94 | 82 | |
| 24 | 46 | 93 | 24 | 98 | 82 | |
| 24 | 50 | 92 | 24 | 102 | 80 | |
| 24 | 54 | 92 | 24 | 106 | 80 | |
| 24 | 58 | 91 | 24 | 110 | 80 | |
| 24 | 62 | 91 | 24 | 114 | 80 | |
| 24 | 66 | 90 | 24 | 119 | 80 | |
| 24 | 70 | 89 | 24 | 124 | 80 |
This circuit amplifies sampled voltage using single-stage scale operation amplifying circuit, the multiple A=1+R of amplification3/R2
=11, output voltage VOUT=-Vin*A+Vref, (VinFor sampled voltage, VrefFor benchmark voltage) as long as therefore thermistor resistance
Value has small variation, and output will have a greater change, and can be calculated electricity eventually by the AD sampling of programming Control unit
The real-time temperature change of machine.
The present embodiment uses the A grade platinum resistance elements 101 of typical coefficient TCR=0.003851, platinum resistance elements 101
Temperature-resistance characteristic: RT=R0[1+aT+bT2-cT3(T-100)]
RTResistance value when for temperature T, resistance value when R0 is 0 DEG C of temperature, a, b, c coefficient are
| Temperature | a | b | c |
| T<0 | 3.90802×10-3 | 5.80195×10-7 | 4.27351×10-12 |
| T≥0 | 3.90802×10-3 | 5.80195×10-7 | 0 |
According to above-mentioned formula can approximation obtain out RT=R0(1+aT), R0=100 Ω, can be calculated in conjunction with circuit design
Motor real time temperatureThe data sampled for 12 digital AD),
Be as shown in the table torque after torque compensation and the temperature table of comparisons, motor driver can according to collected motor around
The variation of group temperature controls the electric current of motor using pid algorithm, to reach compensation torque purpose.
Torque compensation is realized by control electric current, so practical to the compensation of torque is exactly the compensation to electric current,
Therefore the corresponding relationship of current compensation and motor temperature can be substantially formulated,
CElectric current=(T-TC) * k+c, wherein k is coefficient, and c is constant, and T is motor temperature, TCFor room temperature (working environment temperature
Degree).These parameters be not it is invariable, can change with the variation and setting torque of different sizes of motor temperature.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (6)
1. a kind of brushless servo electric screw driver, including electric screw driver and brushless servo electric screw driver controller, feature
It is that electric wire connects between the electric screw driver and brushless servo electric screw driver controller, and the both ends of electric wire are inserted for aviation
Connector is pulled out, aviation plugs connector difference grafting electric screw driver and brushless servo electric screw driver controller, the electric screw
It is equipped with platinum resistance elements in knife, is equipped with torque compensation circuit, platinum resistance elements and torque in brushless servo electric screw driver
Compensation circuit be electrically connected, the torque compensation circuit, including amplifier, power supply, first resistor, second resistance, 3rd resistor,
Thermistor, capacitor, programming Control unit and output end, the amplifier are semiconductor element, and amplifier is equipped with eight ends
Mouthful, first port is electrically connected with the 4th port, and second port, thermistor, first resistor, power end, which are sequentially connected in series, to be electrically connected,
Third port is connected between thermistor and first resistor, and fifth port is electrically connected with second resistance one end, the 6th port with
3rd resistor one end electrically connects, and the second resistance other end electrically connects between the 6th port and 3rd resistor, the 7th port with it is defeated
Outlet electrically connects, and the 3rd resistor other end electrically connects between the 7th port and output end, and tie point electrically connects programming Control
Unit, the 8th port are electrically connected with power supply.
2. a kind of brushless servo electric screw driver according to claim 1, characterized in that the programming Control unit includes
AD sample circuit, and programming Control unit is electrically connected with motor driver.
3. a kind of brushless servo electric screw driver according to claim 1, characterized in that the first port and the 4th end
It is grounded respectively between mouth, second port and thermistor.
4. a kind of brushless servo electric screw driver according to claim 1, characterized in that fifth port and second resistance it
Between be connected with reference potential.
5. a kind of brushless servo electric screw driver according to claim 1, characterized in that the 8th port and power supply it
Between be connected with capacitor, capacitor connects electricity.
6. a kind of brushless servo electric screw driver according to claim 1, characterized in that the screwdriver includes shell,
The motor being connected and output main shaft are equipped in shell, output main shaft one end is stretched out outside shell and is connected with batch nozzle, the platinum
Resistive element is mounted on motor case surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107106.1U CN208867074U (en) | 2018-07-11 | 2018-07-11 | A kind of brushless servo electric screw driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107106.1U CN208867074U (en) | 2018-07-11 | 2018-07-11 | A kind of brushless servo electric screw driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208867074U true CN208867074U (en) | 2019-05-17 |
Family
ID=66462923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821107106.1U Expired - Fee Related CN208867074U (en) | 2018-07-11 | 2018-07-11 | A kind of brushless servo electric screw driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208867074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108544416A (en) * | 2018-07-11 | 2018-09-18 | 东莞市速动电子科技有限公司 | A kind of brushless servo electric screw driver |
-
2018
- 2018-07-11 CN CN201821107106.1U patent/CN208867074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108544416A (en) * | 2018-07-11 | 2018-09-18 | 东莞市速动电子科技有限公司 | A kind of brushless servo electric screw driver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190517 Termination date: 20200711 |