CN202825674U - Numerical control fixed torque electric wrench - Google Patents
Numerical control fixed torque electric wrench Download PDFInfo
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- CN202825674U CN202825674U CN 201220509623 CN201220509623U CN202825674U CN 202825674 U CN202825674 U CN 202825674U CN 201220509623 CN201220509623 CN 201220509623 CN 201220509623 U CN201220509623 U CN 201220509623U CN 202825674 U CN202825674 U CN 202825674U
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Abstract
The utility model relates to a handheld numerical control fixed torque electric wrench which comprises a shell body, a sleeve, an elastic shaft, a speed reducing mechanism and a motor, wherein an output shaft of the motor is in transmission connection with an input end of the speed reducing mechanism, an output end of the speed reducing mechanism is connected with the elastic shaft, and the other end of the elastic shaft is fixedly connected with the sleeve. The numerical control fixed torque electric wrench further comprises an electronic control system, wherein the electronic control system comprises a sensor, a main control unit, a memorizer, a keying circuit, a display unit and a relay driving circuit, and the sensor is a strain piece and is stuck to the elastic shaft. According to the numerical control fixed torque electric wrench, the strain piece is directly stuck to the elastic shaft, and high fixed torque tightening accuracy is achieved by means of direct measurement of torsion and rotation of the motor controlled by the electronic control system.
Description
Technical field
The utility model relates to and a kind ofly screws or unclamp the portable power tools that screw or nut are used, and particularly relates to a kind of hand-held and decides the electronic spanner of moment of torsion.
Background technology
In recent years, be accompanied by the maximization of structure, it is more and more extensive that high-strength bolt is used, and high-strength bolt is mainly used on the structural steelwork, is used for connecting the tie point of steel plates of steel structure.And correctly tightening of high-strength bolt is very important, and high-strength bolt only reaches when fastening in the situation of pretightning force of designing requirement, and fastening strength and fatigue life that guarantee is set, its securing member is due to be fastenedly connected effect thereby bring into play.At present the national and foreign standards strict regulations moment of torsion of high-strength bolt and the technical indicator of pretightning force, the on-the-spot final pretightning force of high-strength bolt can't directly be measured at present, only has the high electronic spanner of moment of torsion of deciding of the precision of employing to guarantee that the whole screwing torque of high-strength bolt reaches the requirement of setting.Existingly decide the electronic spanner of moment of torsion and adopt current of electric to feed back to measure the torque value of electronic spanner more, this method is indirectly to measure, and is subject to the impact of the factors such as voltage, and the observing and controlling precision is lower.
The utility model content
The technical problems to be solved in the utility model provides the numerical control little, lightweight, easy and simple to handle of a kind of volume and decides the electronic spanner of moment of torsion, adopts the mode of directly measuring moment of torsion, has the higher moment of torsion of deciding and tightens precision.
The electronic spanner of moment of torsion is decided in the utility model numerical control, comprise that a kind of numerical control decides the electronic spanner of moment of torsion, comprise housing, sleeve, elastic shaft, reducing gear and motor, the output shaft of motor and the input of reducing gear are in transmission connection, the output of reducing gear is connected with elastic shaft, the other end of elastic shaft is fixedly connected with sleeve, this device also includes electric-control system, described electric-control system comprises sensor, main control unit, memory, key circuit, display unit, relay drive circuit, sensor is foil gauge, and sensor sticks on the elastic shaft;
Wherein, sensor is used for the Real-time Collection voltage differential signal, and the signal that gathers is sent to the signal input part of main control unit;
Memory, be used for the storage main control unit carry out signal process form the matched curve data required preset nominal data, the data output end of memory connects the corresponding data input of main control unit;
Key circuit is used to main control unit that the duty switching signal is provided, the adjustment parameter when providing operation for main control unit, and the output line road of key circuit connects the corresponding data input of main control unit;
Display unit is used for the demonstration data that the demonstration main control unit is exported, and the data input pin of display unit connects the corresponding data output of main control unit;
Relay drive circuit, be used for the control signal according to main control unit output, the action of control relay movable contact, finish the break-make of Motor Drive wire loop, the signal input line road of relay drive circuit connects the corresponding signal output of main control unit, and the output line road of relay drive circuit connects the corresponding contacts of relay;
Main control unit is used for gathering analog signal, and finishes analog-to-digital conversion formation sensor sample data; Carry out the data processing according to the nominal data that presets in the memory, finish the data and curves match, calculate real-time moment of torsion data; The moment of torsion data are converted to the demonstration data are sent to display unit; Duty switching signal or adjustment parameter according to key circuit provides form the relay control signal.
The electronic spanner of moment of torsion is decided in the utility model numerical control, and the pin 1 of wherein said sensor connects working power, pin 4 ground connection, and pin 2, pin 3 are connected respectively pin 9, the pin 10 of main control unit, connect capacitor C 1 between the pin 2 of sensor J5 and the pin 3; Ground connection behind the pin 9 series resistance R8 of main control unit, ground connection behind the pin 10 series resistance R9 of main control unit;
The pin 8 of memory connects working power, connect capacitor C 15 between pin 8 and the pin 1, pin 1, pin 2, pin 3 and pin 4 ground connection, pin 7 connects working power by series resistance R34, pin 6 connects working power by series resistance R33, and pin 5 connects working power by series resistance R32; The pin 7 of memory, pin 6, pin 5 are connected respectively pin 28, pin 30, the pin 29 of main control unit;
Display unit comprises display driver chip and liquid crystal display, and the pin 39 of display driver chip, pin 40, pin 41, pin 42, pin 43, pin 44, pin 45, pin 46, pin 47, pin 48, pin 24, pin 23, pin 22, pin 21 are connected respectively pin 14, pin 13, pin 12, pin 11, pin 9, pin 8, pin 7, pin 6, pin 5, pin 4, pin 3, pin 2, the pin 1 of display screen; The pin 16 of display driver chip, pin 17 connect working power, pin 13 ground connection of display driver chip, 13 series capacitance C9 of the pin 16 of display driver chip and pin; Connect working power behind the pin 9 series resistance R38 of display driver chip, connect working power behind the pin 10 series resistance R37 of display driver chip, connect working power behind the pin 11 series resistance R36 of display driver chip, connect working power behind the pin 12 series resistance R35 of display driver chip, the pin 9 of display driver chip U5, pin 12, pin 11 are connected respectively pin 18, pin 19, the pin 22 of main control unit;
Key circuit comprises button S1, button S2, button S3, button S4, connects working power, other end ground connection behind the end series resistance R2 of button S2; Connect working power, other end ground connection behind the end series resistance R3 of button S3; Connect working power, other end ground connection behind the end series resistance R4 of button S4; The end of button S1 connects the pin 49 of main control unit, other end ground connection; The end of button S2 is drawn the pin 44 that holding wire connects main control unit, and the end of button S3 is drawn the pin 45 that holding wire connects main control unit, and the end of button S4 is drawn the pin 46 that holding wire connects main control unit;
A fixed contact of relay connects working power, the colelctor electrode of another fixed contact connecting triode Q5, series diode D2 between the fixed contact of relay, the grounded emitter of triode Q5, the base stage of triode Q5 connects working power by series resistance R25, and the base stage of triode Q5 connects the pin 39 of main control unit by series resistance R26.
The electronic spanner of moment of torsion is decided in the utility model numerical control, wherein said display unit also comprises backlight circuit, comprising the backlight drive module, series connection Light-Emitting Diode D3 between the pin 4 of backlight drive module and the pin 5, the pin 6 of backlight drive module is by series capacitance C19 ground connection, pin 2 ground connection, series capacitance C20 between the pin 7 of backlight drive module and the pin 8, the pin 6 of backlight drive module connects respectively pin 1, pin 3, and the pin 1 of backlight drive module is connected with pin and is connected an inductance coil; The colelctor electrode of triode Q8 connects the pin 1 of backlight drive module, the base stage of triode Q8 is by the colelctor electrode of series resistance R29 connecting triode Q7, series resistance R30 between the base stage of triode Q8 and emitter stage, electrochemical capacitor C17 is in parallel with capacitor C 18, the positive pole of electrochemical capacitor C17 connects working power, minus earth, the emitter stage of the anodal connecting triode Q8 of electrochemical capacitor C17; The grounded emitter of triode Q7 connects working power behind the base series resistor R11 of triode Q7, connects the pin 36 of main control unit behind the base series resistor R10 of triode Q7.
The electronic spanner of moment of torsion is decided in the utility model numerical control, also comprise power circuit, power circuit comprises voltage transformation module, shunt capacitance C10 and electrochemical capacitor C7 between the pin 2 of voltage transformation module and the pin 1, shunt capacitance C12 and electrochemical capacitor C11 between the pin 3 of voltage transformation module and the pin 1, the minus earth of electrochemical capacitor C7 and electrochemical capacitor C11, the pin 2 connection device power supplys of voltage transformation module, pin 3 output power supplies of voltage transformation module.
The electronic spanner of moment of torsion is decided in the utility model numerical control, wherein said reducing gear is planetary reducer, the wheel shaft of the primary centre wheel of planetary reducer and the output shaft of motor are in transmission connection, and the final stage planetary gear of planetary reducer is fixedly connected with elastic shaft through the final stage planetary wheel carrier.Adopt gear reduction unit, can effectively reduce the volume of electronic spanner, and stable working, bearing capacity is large.
The electronic spanner of moment of torsion is decided in the utility model numerical control, the axial location of the wheel shaft of every grade of centre wheel of wherein said planetary reducer all offers the wire guide that is interconnected, the centre drift pipe is installed in the wire guide, there is the gap between the outer circumference surface of centre drift pipe and the hole wall of wire guide, the left end of centre drift pipe is fixedly connected with elastic shaft, the right-hand member of centre drift pipe is installed with conducting slip ring, the dead in line of the wheel shaft of the axis of the conducting ring of conducting slip ring and primary centre wheel, the brush that contacts with conducting slip ring is fixedly mounted on the housing by the brush guide frame, offer radial hole on the outer circumference surface of elastic shaft, the axial location of elastic shaft offers the axial hole that is communicated with radial hole, axial hole is communicated with wire guide, the holding wire of sensor passes through radial hole successively, behind axial hole and the centre drift pipe, be connected with the conducting ring on the electric slip ring, the output line of brush is connected with main control unit.By offering wire guide, and in wire guide plug-in mounting centre drift pipe, the right side of the data wire guiding decelerator of sensor can have been solved the problem of measuring moment of torsion parts and electronic plank control section line, effectively reduced the volume of electronic spanner.If the outer cabling mode of employing casing, front end is installed conducting slip ring, and then front end measurement moment of torsion piece volumes is larger, can not satisfy the instructions for use that high-strength bolt is tightened; If take wireless transmission method, then can't overcome electromagnetic interference and the lower problem of signal transmission rate of high speed brush motor.
The electronic spanner of moment of torsion is decided in the utility model numerical control, wherein said motor is connected with planetary reducer by the transmission changement, the transmission changement comprises the feather key seat, the first bevel gear, the second bevel gear and the 3rd bevel gear, the feather key seat is installed on the wheel shaft of primary centre wheel by feather key, be installed with the first bevel gear and the second bevel gear that are oppositely arranged on the feather key seat, the 3rd bevel gear is installed in the below of the first bevel gear and the second bevel gear, and can mesh with the first bevel gear or the second bevel gear, the wheel shaft of the 3rd bevel gear is in transmission connection by the output shaft of gear and motor, on the first bevel gear and the second bevel gear bevel gear locating rack is installed, the first bevel gear and the second bevel gear are positioned within the bevel gear locating rack, the first bevel gear be connected bevel gear and be connected with the bevel gear locating rack by bearing, the right-hand member of bevel gear locating rack is fixedly connected with the commutation connecting rod, the right-hand member of commutation connecting rod is provided with reversing hand wheel, reversing hand wheel is installed on the housing, reversing hand wheel and housing are threaded connection, offer cannelure on the inner peripheral surface of reversing hand wheel, the right-hand member of commutation connecting rod is provided with projection, the projection of commutation connecting rod is positioned at cannelure, and the axis of reversing hand wheel is parallel with the axis of the wheel shaft of primary centre wheel.
The electronic spanner of moment of torsion is decided in the utility model numerical control, wherein said motor adopts high-speed electric expreess locomotive, be provided with stator braking winding in the motor, relay drive circuit, can be according to the control signal of main control unit output, the break-make in restraining coil loop is finished in the action of control relay movable contact, thus the duty of control stator braking winding.By the outer reversing hand wheel of casing, drive bevel gear locating rack move left and right, realize the engagement of first, second bevel gear and the 3rd bevel gear, thereby realize the positive decommuntation of electronic spanner, so that electronic spanner adopted singly turn to, the high-speed electric expreess locomotive of high power density, totally reduce the volume and weight of electronic spanner.By stator braking winding is set in motor, can realize that rotor stops operating rapidly, reduce the inertia overshoot, improve the moment of torsion control accuracy of electronic spanner.
The electronic spanner of moment of torsion is decided in the utility model numerical control, also comprises instrument bin, and instrument bin is positioned at the right side of planetary reducer, and electric-control system is installed in the instrument bin.
The utility model numerical control is decided the electronic spanner difference from prior art of moment of torsion and is that the utility model is by arranging elastic shaft between sleeve and reducing gear, and be pasted with sensor at elastic shaft, directly measure torque value by sensor and be sent to main control unit, main control unit compares the data that nominal data and sensor detect that preset in the memory, when the data that sensor detects are passed through key circuit predetermined torque data near the user, the action of main control unit control relay disconnects motor power.Than the mode of indirect measurement, can make electronic spanner have the higher moment of torsion of deciding and tighten precision, thereby satisfy the fastening of high-strength bolt.
The utility model is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that the master that the electronic spanner of moment of torsion is decided in the utility model numerical control looks cutaway view;
Fig. 2 is the right view that the electronic spanner of moment of torsion is decided in the utility model numerical control;
Fig. 3 is that A among Fig. 2 is to view;
Fig. 4 is that main control unit electrical block diagram in the electric-control system of the electronic spanner of moment of torsion is decided in the utility model numerical control;
Fig. 5 is that display unit circuit structural representation in the electric-control system of the electronic spanner of moment of torsion is decided in the utility model numerical control;
Fig. 6 is the backlight circuit structural representation that display unit in the electric-control system of the electronic spanner of moment of torsion is decided in the utility model numerical control;
Fig. 7 is that circuit construction of electric power schematic diagram in the electric-control system of the electronic spanner of moment of torsion is decided in the utility model numerical control;
Fig. 8 is the electric-control system repeat circuit driving circuit structure schematic diagram that the electronic spanner of moment of torsion is decided in the utility model numerical control;
Fig. 9 is that key circuit structural representation in the electric-control system of the electronic spanner of moment of torsion is decided in the utility model numerical control.
The specific embodiment
As shown in Figure 1, the utility model numerical control is decided the electronic spanner of moment of torsion and is comprised housing 110, sleeve 111, elastic shaft 112, reducing gear, motor 113 and electric-control system.The output shaft of motor 113 and the input of reducing gear are in transmission connection, the output of reducing gear is connected with elastic shaft 112, and the other end of elastic shaft 112 is fixedly connected with sleeve 111, is pasted with sensor at elastic shaft 112, sensor is foil gauge 135, and foil gauge 135 is connected with electric-control system.Present embodiment Elastic axle adopts the filled circles axis of a cylinder, is pasted with the foil gauge of surveying 45 ° of shear stresses on it, and foil gauge adopts four, is affixed on the middle part of elastomer axis segment, away from the inhomogeneous two ends of stress distribution, and two combos, two groups are symmetrical.Elastomer also can adopt thin wall cylinder or four structures such as rectangular beam.Elastomer can adopt spring steel or high-strength engineering plastic to make.
Reducing gear adopts three-stage planet gear reducer 114 in the present embodiment, the wheel shaft of the primary centre wheel 115 of planetary reducer 114 and the output shaft 140 of motor 113 are in transmission connection, and the final stage planetary gear 117 of planetary reducer 114 is fixedly connected with elastic shaft 112 through final stage planetary wheel carrier 116.Axial location at the wheel shaft of every grade of centre wheel of planetary reducer 114 all offers the wire guide 118 that is interconnected.Outer circumference surface at elastic shaft 112 offers radial hole 119, offers the axial hole 120 that is communicated with radial hole 119 in the axial location of elastic shaft 112, and axial hole 120 is communicated with wire guide 118.Centre drift pipe 125 is installed in wire guide 118, there is the gap between the hole wall of the outer circumference surface of centre drift pipe 125 and wire guide 118, the left end of centre drift pipe 125 is fixedly connected with the right-hand member of elastic shaft 112, the dead in line of the axis of centre drift pipe 125 and elastic shaft 112, the purpose that the gap is set between the hole wall of the outer circumference surface of centre drift pipe 125 and wire guide 118 is for fear of because the rotating speed of the wheel shaft of every grade of centre wheel is all different with the rotating speed of centre drift pipe 125, and the situation of generation phase mutual interference.The right-hand member of centre drift pipe 125 is installed with conducting slip ring 121, the dead in line of the wheel shaft of the axis of the conducting ring of conducting slip ring 121 and primary centre wheel 115, the brush 123 that contacts with conducting slip ring 121 is fixedly mounted on the housing 110 by brush guide frame 124, after the holding wire of foil gauge 135 passes through radial hole 119, axial hole 120 and centre drift pipe 125 successively, be connected with the conducting ring 122 on the electric slip ring 121, the output line of brush 123 is connected with the main control unit of electric-control system.
Certainly, reducing gear of the present utility model also can adopt the decelerator of other forms such as cylinder gear speed reducer or worm type of reduction gearing.
The utility model numerical control is decided the electronic spanner of moment of torsion for easy to operate, and with axis vertical arrange of its operating grip 136 with sleeve 111, the axis of the motor 113 also axis with sleeve 111 is vertical.In order to realize the power output of motor 113, motor 113 is connected with planetary reducer 114 by the transmission changement.The transmission changement comprises feather key seat 126, the first bevel gear 127, the second bevel gear 128 and the 3rd bevel gear 129, feather key seat 126 is installed on the wheel shaft of primary centre wheel 115 by feather key, thereby makes spline can take turns along primary centre 115 axle axis direction slip.Be installed with the first bevel gear 127 and the second bevel gear 128 that are oppositely arranged on the feather key seat 126, the 3rd bevel gear 129 is installed in the below of the first bevel gear 127 and the second bevel gear 128, and can mesh with the first bevel gear 127 or the second bevel gear 128, the wheel shaft of the 3rd bevel gear 129 is in transmission connection by the output shaft 140 of gear and motor 113.On the first bevel gear 127 and the second bevel gear 128 bevel gear locating rack 130 is installed, bevel gear locating rack 130 comprises interconnective right baffle-plate and right baffle plate, the first bevel gear 127 and the second bevel gear 128 are positioned within the bevel gear locating rack 130, the first bevel gear 127 be connected bevel gear 128 and be connected with bevel gear locating rack 130 by bearing, when the first bevel gear 127 and 128 rotation of the second bevel gear, bevel gear locating rack 130 is motionless with respect to housing 110.In conjunction with shown in Figure 3, the right-hand member of bevel gear locating rack 130 is fixedly connected with commutation connecting rod 131, the right-hand member of commutation connecting rod 131 is provided with reversing hand wheel 132, reversing hand wheel 132 is installed on the housing 110, and reversing hand wheel 132 is threaded connection with housing 110, the axis of reversing hand wheel 132 is parallel with the axis of the wheel shaft of primary centre wheel 115, commutation connecting rod 131 is also parallel with the axis of the wheel shaft of primary centre wheel 115, inner peripheral surface at reversing hand wheel 132 offers cannelure, the right-hand member of commutation connecting rod 131 is provided with projection, the projection of commutation connecting rod 131 is positioned at cannelure, the projection of commutation connecting rod 131 can be slided in cannelure, by turning reversing hand wheel 132, reversing hand wheel 132 is mobile to the left or to the right, commutation connecting rod 131 by the projection on it along with reversing hand wheel 132 is mobile to the left or to the right, can drive bevel gear locating rack 130 horizontally slips along the axle axis of primary centre wheel 115, thereby realize the 3rd bevel gear 129 and the first bevel gear 127 or 128 engagements of the second bevel gear, and then reach the purpose that sleeve 111 rotations commutate, realize the commutation of electronic spanner.The transmission changement also can adopt the transmission of multiaxis roller gear external tooth, by the clutch of transition gear, realizes rotating.
Electric-control system of the present utility model comprises sensor, main control unit, memory, key circuit, display unit, relay drive circuit;
Sensor is used for the Real-time Collection voltage differential signal, and the signal that gathers is sent to the signal input part of main control unit;
Memory, be used for the storage main control unit carry out signal process form the matched curve data required preset nominal data, the data output end of memory connects the corresponding data input of main control unit;
Key circuit is used to main control unit that the duty switching signal is provided, the adjustment parameter when providing operation for main control unit, and the output line road of key circuit connects the corresponding data input of main control unit;
Display unit is used for the demonstration data that the demonstration main control unit is exported, and the data input pin of display unit connects the corresponding data output of main control unit;
Relay drive circuit, be used for the control signal according to main control unit output, the action of control relay movable contact, finish the break-make in Motor Drive wire loop and restraining coil loop, the signal input line road of relay drive circuit connects the corresponding signal output of main control unit, and the output line road of relay drive circuit connects the corresponding contacts of relay;
Main control unit is used for gathering analog signal, and finishes analog-to-digital conversion formation sensor sample data; Carry out the data processing according to the nominal data that presets in the memory, finish the data and curves match, calculate real-time moment of torsion data; The moment of torsion data are converted to the demonstration data are sent to display unit; Duty switching signal or adjustment parameter according to key circuit provides form the relay control signal.
Also comprise power circuit, be used to the active device of electric-control system that working power is provided.
In the embodiment of this electric-control system, sensor adopts the foil gauge type, and memory adopts 24LC16 series, and main control unit adopts ADUC824 series, and the backlight drive module adopts SP4403 series, and liquid crystal driver module adopts HT1621 series.Built-in 24 potential differences are divided the ADUC824 type single-chip microcomputer of output, and this single-chip microcomputer is with the A/D convertor circuit of using in the general difference measurement, and amplifying circuit and voltage reference circuit concentrate on single-chip microcomputer inside fully, and anti-interference is stronger.By taking the mode of multistage segmented fitting working sensor curve, carry out the multi-point calibration data relatively for every class sensor, can improve certainty of measurement.
As shown in Figure 4, the pin 1 of sensor J5 connects working power VCC, pin 4 ground connection, and pin 2, pin 3 are connected respectively pin 9, the pin 10 of main control unit U1, connect capacitor C 1 between the pin 2 of sensor J5 and the pin 3; Ground connection behind the pin 9 series resistance R8 of main control unit U1, ground connection behind the pin 10 series resistance R9 of main control unit U1;
The pin 8 of memory U6 connects working power VCC, connect capacitor C 15 between pin 8 and the pin 1, pin 1, pin 2, pin 3 and pin 4 ground connection, pin 7 connects working power VCC by series resistance R34, pin 6 connects working power VCC by series resistance R33, and pin 5 connects working power VCC by series resistance R32; The pin 7 of memory U6, pin 6, pin 5 are connected respectively pin 28, pin 30, the pin 29 of main control unit U1;
The pin 32 of main control unit U1 is connected with pin and is connected a crystal oscillator XTAL1, pin 49 connects working power VCC by series resistance R7, pin 15 is by series resistance R1 ground connection, pin 15 connects working power VCC by series capacitance C14,21 series capacitance C6 of pin 20 and pin, 35 series capacitance C2 of pin 34 and pin, 48 series capacitance C4 of pin 47 and pin, pin 5 connects working power VCC, series capacitance C3 between pin 5 and the pin 6, pin 6 and pin 7 ground connection, ground connection behind the pin 8 series capacitance C5; Ground connection after the pin 41 of main control unit U1 is connected with binding post J7;
As shown in Figure 5, display unit comprises display driver chip U5 and liquid crystal display J1, the data that will show display driver chip change the driving signal of liquid crystal display into, and the pin 39 of display driver chip U5, pin 40, pin 41, pin 42, pin 43, pin 44, pin 45, pin 46, pin 47, pin 48, pin 24, pin 23, pin 22, pin 21 are connected respectively pin 14, pin 13, pin 12, pin 11, pin 9, pin 8, pin 7, pin 6, pin 5, pin 4, pin 3, pin 2, the pin 1 of display screen J1; The pin 16 of display driver chip U5, pin 17 connect working power VCC, pin 13 ground connection of display driver chip U5,13 series capacitance C9 of the pin 16 of display driver chip U5 and pin; Connect working power VCC behind the pin 9 series resistance R38 of display driver chip U5, connect working power VCC behind the pin 10 series resistance R37 of display driver chip U5, connect working power VCC behind the pin 11 series resistance R36 of display driver chip U5, connect working power VCC behind the pin 12 series resistance R35 of display driver chip U5, the pin 9 of display driver chip U5, pin 12, pin 11 are connected respectively pin 18, pin 19, the pin 22 of main control unit U1.
As shown in Figure 6, display unit also comprises backlight circuit, comprising backlight drive module U7, series connection Light-Emitting Diode D3 between the pin 4 of backlight drive module U7 and the pin 5, the pin 6 of backlight drive module U7 is by series capacitance C19 ground connection, pin 2 ground connection, series capacitance C20 between the pin 7 of backlight drive module U7 and the pin 8, the pin 6 of backlight drive module U7 connects respectively pin 1, pin 3, and the pin 1 of backlight drive module U7 is connected with pin and is connected an inductance coil L1; The colelctor electrode of triode Q8 connects the pin 1 of backlight drive module U7, the base stage of triode Q8 is by the colelctor electrode of series resistance R29 connecting triode Q7, series resistance R30 between the base stage of triode Q8 and emitter stage, electrochemical capacitor C17 is in parallel with capacitor C 18, the positive pole of electrochemical capacitor C17 meets working power VCC, minus earth, the emitter stage of the anodal connecting triode Q8 of electrochemical capacitor C17; The grounded emitter of triode Q7 connects working power VCC behind the base series resistor R11 of triode Q7, connect the pin 36 of main control unit U1 behind the base series resistor R10 of triode Q7.By backlight circuit is set, can be convenient to the checking of demonstration data under the darker operating mode.
Certainly, display unit also can adopt LED display.
As shown in Figure 7, power circuit comprises voltage transformation module U4, by binding post J2 access external power source, shunt capacitance C10 and electrochemical capacitor C7 between the pin 2 of voltage transformation module U4 and the pin 1, shunt capacitance C12 and electrochemical capacitor C11 between the pin 3 of voltage transformation module U4 and the pin 1, the minus earth of electrochemical capacitor C7 and electrochemical capacitor C11, the pin 2 connection device power vd D of voltage transformation module U4, the pin 3 output power supply VCC of voltage transformation module U4;
As shown in Figure 8, a fixed contact of relay J connects working power VCC, the colelctor electrode of another fixed contact connecting triode Q5, series diode D2 between the fixed contact of relay J, the grounded emitter of triode Q5, the base stage of triode Q5 connects working power VCC by series resistance R25, and the base stage of triode Q5 connects the pin 39 of main control unit U1 by series resistance R26;
As shown in Figure 9, key circuit comprises button S1, button S2, button S3, button S4, connects working power VCC, other end ground connection behind the end series resistance R2 of button S2; Connect working power VCC, other end ground connection behind the end series resistance R3 of button S3; Connect working power VCC, other end ground connection behind the end series resistance R4 of button S4; The end of button S1 connects the pin 49 of main control unit U1, other end ground connection; The end of button S2 is drawn the pin 44 that holding wire connects main control unit, and the end of button S3 is drawn the pin 45 that holding wire connects main control unit, and the end of button S4 is drawn the pin 46 that holding wire connects main control unit;
Spanner in use, measure voltage differential signal by the foil gauge as sensor, this signal directly is sent to main control unit, main control unit is measured, after obtaining sampled data, utilize storage nominal data in memory the inside to carry out curve fitting, obtain the torque value data of actual displayed, in the liquid crystal screen display; If the user does not arrange peak value in system, then system does not control motor, if electronic spanner main switch K is closed, then motor is in powering state always; If the user is provided with peak value, then whenever measure an actual torque Value Data, all can compare with the moment of torsion data that the user sets, in case near user's predetermined torque data, just drag down the Control pin, the actuating of relay disconnects motor power.
Electric-control system on ﹠ off switch of the present utility model is designated S1, key is set is designated S2, and reset key is designated S3, and the peak value key is designated S4.When electronic spanner used, at first plugged was connected instrument power by S1, pressed the S2 key and entered the moment of torsion preset state, and this moment, S3 key function was addend, and S4 key function by S3 and S4 torsion adjustable preset value, withdraws from the moment of torsion preset state by S2 for displacement again.Pressing S3 can zero clearing, can start peak function by S4, pull electronic spanner main switch K motor start-up this moment after, electronic spanner instrument can automatically by relay J early cut-off motor power, stop to predetermined torque electronic spanner.Electronic spanner main switch K only controls motor power, connects with the relay normally-closed contact.After motor power is cut off in the relay J action, simultaneously that restraining coil is closed, motor is stopped operating immediately.
" setting " key and another other keys (such as S3) operate simultaneously, can enter the demarcation state, the S3 function is converted to " addend ", and the S4 function is converted to " displacement ", before determining to enter the demarcation state, must by S3 and the correct demarcation password of S4 input, determine to enter the demarcation state by S2.Carry out successively multi-point calibration after entering the demarcation state, for example the 1st is 0 point, set calibration point by S3 and S4, when the standard torque value of caliberating device is 0, finish at the 1st by S2 and put number, show simultaneously and demarcate code, carry out subsequently the 2nd point (such as 20% full scale point), carry out successively, until length withdraws from the demarcation state by S2.
After finishing demarcation, default a certain torque value, motor just cuts off the power supply before reaching this torque value prerequisite, motor brake, the torque value after the stall will be very near the predetermined torque value.
Above-described embodiment is described preferred embodiment of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (9)
1. the electronic spanner of moment of torsion is decided in a numerical control, comprise housing (110), sleeve (111), elastic shaft (112), reducing gear and motor (113), the output shaft of described motor (113) and the input of reducing gear are in transmission connection, the output of described reducing gear is connected with elastic shaft (112), the other end of elastic shaft (112) is fixedly connected with sleeve (111), it is characterized in that: also include electric-control system, described electric-control system comprises sensor, main control unit, memory, key circuit, display unit, relay drive circuit, described sensor is foil gauge, and described sensor sticks on the elastic shaft (112);
Wherein, sensor is used for the Real-time Collection voltage differential signal, and the signal that gathers is sent to the signal input part of main control unit;
Memory, be used for the storage main control unit carry out signal process form the matched curve data required preset nominal data, the data output end of memory connects the corresponding data input of main control unit;
Key circuit is used to main control unit that the duty switching signal is provided, the adjustment parameter when providing operation for main control unit, and the output line road of key circuit connects the corresponding data input of main control unit;
Display unit is used for the demonstration data that the demonstration main control unit is exported, and the data input pin of display unit connects the corresponding data output of main control unit;
Relay drive circuit, be used for the control signal according to main control unit output, the action of control relay movable contact, finish the break-make of Motor Drive wire loop, the signal input line road of relay drive circuit connects the corresponding signal output of main control unit, and the output line road of relay drive circuit connects the corresponding contacts of relay;
Main control unit is used for gathering analog signal, and finishes analog-to-digital conversion formation sensor sample data; Carry out the data processing according to the nominal data that presets in the memory, finish the data and curves match, calculate real-time moment of torsion data; The moment of torsion data are converted to the demonstration data are sent to display unit; Duty switching signal or adjustment parameter according to key circuit provides form relay control signal.
2. the electronic spanner of moment of torsion is decided in numerical control according to claim 1, it is characterized in that: the pin 1 of described sensor (J5) connects working power (VCC), pin 4 ground connection, pin 2, pin 3 are connected respectively pin 9, the pin 10 of described main control unit (U1), connect capacitor C 1 between the pin 2 of sensor J5 and the pin 3; Ground connection behind the pin 9 series resistance R8 of main control unit (U1), ground connection behind the pin 10 series resistance R9 of main control unit (U1);
The pin 8 of described memory (U6) connects working power (VCC), connect capacitor C 15 between pin 8 and the pin 1, pin 1, pin 2, pin 3 and pin 4 ground connection, pin 7 connects working power (VCC) by series resistance R34, pin 6 connects working power (VCC) by series resistance R33, and pin 5 connects working power (VCC) by series resistance R32; The pin 7 of memory (U6), pin 6, pin 5 are connected respectively pin 28, pin 30, the pin 29 of main control unit (U1);
Described display unit comprises display driver chip (U5) and liquid crystal display (J1), and the pin 39 of display driver chip (U5), pin 40, pin 41, pin 42, pin 43, pin 44, pin 45, pin 46, pin 47, pin 48, pin 24, pin 23, pin 22, pin 21 are connected respectively pin 14, pin 13, pin 12, pin 11, pin 9, pin 8, pin 7, pin 6, pin 5, pin 4, pin 3, pin 2, the pin 1 of display screen (J1); The pin 16 of display driver chip (U5), pin 17 connect working power (VCC), pin 13 ground connection of display driver chip (U5), 13 series capacitance C9 of the pin 16 of display driver chip (U5) and pin; Connect working power (VCC) behind the pin 9 series resistance R38 of display driver chip (U5), connect working power (VCC) behind the pin 10 series resistance R37 of display driver chip (U5), connect working power (VCC) behind the pin 11 series resistance R36 of display driver chip (U5), connect working power (VCC) behind the pin 12 series resistance R35 of display driver chip (U5), the pin 9 of display driver chip U5, pin 12, pin 11 are connected respectively pin 18, pin 19, the pin 22 of main control unit (U1);
Described key circuit comprises button S1, button S2, button S3, button S4, connects working power (VCC), other end ground connection behind the end series resistance R2 of button S2; Connect working power (VCC), other end ground connection behind the end series resistance R3 of button S3; Connect working power (VCC), other end ground connection behind the end series resistance R4 of button S4; The end of button S1 connects the pin 49 of main control unit (U1), other end ground connection; The end of button S2 is drawn the pin 44 that holding wire connects main control unit (U1), and the end of button S3 is drawn the pin 45 that holding wire connects main control unit (U1), and the end of button S4 is drawn the pin 46 that holding wire connects main control unit (U1);
A fixed contact of described relay (J) connects working power (VCC), the colelctor electrode of another fixed contact connecting triode Q5, series diode D2 between the fixed contact of relay (J), the grounded emitter of triode Q5, the base stage of triode Q5 connects working power (VCC) by series resistance R25, and the base stage of triode Q5 connects the pin 39 of main control unit (U1) by series resistance R26.
3. the electronic spanner of moment of torsion is decided in numerical control according to claim 2, it is characterized in that: described display unit also comprises backlight circuit, comprising backlight drive module (U7), series connection Light-Emitting Diode D3 between the pin 4 of backlight drive module (U7) and the pin 5, the pin 6 of backlight drive module (U7) is by series capacitance C19 ground connection, pin 2 ground connection, series capacitance C20 between the pin 7 of backlight drive module (U7) and the pin 8, the pin 6 of backlight drive module (U7) connects respectively pin 1, pin 3, the pin 1 of backlight drive module (U7) are connected with pin and are connected an inductance coil (L1); The colelctor electrode of triode Q8 connects the pin 1 of backlight drive module (U7), the base stage of triode Q8 is by the colelctor electrode of series resistance R29 connecting triode Q7, series resistance R30 between the base stage of triode Q8 and emitter stage, electrochemical capacitor C17 is in parallel with capacitor C 18, the positive pole of electrochemical capacitor C17 connects working power (VCC), minus earth, the emitter stage of the anodal connecting triode Q8 of electrochemical capacitor C17; The grounded emitter of triode Q7 connects working power (VCC) behind the base series resistor R11 of triode Q7, connect the pin 36 of main control unit (U1) behind the base series resistor R10 of triode Q7.
4. the electronic spanner of moment of torsion is decided in numerical control according to claim 3, it is characterized in that: also comprise power circuit, described power circuit comprises voltage transformation module (U4), shunt capacitance C10 and electrochemical capacitor C7 between the pin 2 of voltage transformation module (U4) and the pin 1, shunt capacitance C12 and electrochemical capacitor C11 between the pin 3 of voltage transformation module (U4) and the pin 1, the minus earth of electrochemical capacitor C7 and electrochemical capacitor C11, the pin 2 connection device power supplys (VDD) of voltage transformation module (U4), pin 3 output power supplies (VCC) of voltage transformation module (U4).
5. the electronic spanner of moment of torsion is decided in numerical control according to claim 1, it is characterized in that: described reducing gear is planetary reducer (114), the wheel shaft of the primary centre wheel (115) of planetary reducer (114) and the output shaft of motor (113) are in transmission connection, and the final stage planetary gear (117) of planetary reducer (114) is fixedly connected with elastic shaft (112) through final stage planetary wheel carrier (116).
6. the electronic spanner of moment of torsion is decided in numerical control according to claim 5, it is characterized in that: the axial location of the wheel shaft of every grade of centre wheel of described planetary reducer (114) all offers the wire guide (118) that is interconnected, centre drift pipe (125) is installed in the described wire guide (118), there is the gap between the hole wall of the outer circumference surface of described centre drift pipe (125) and wire guide (118), the left end of described centre drift pipe (125) is fixedly connected with elastic shaft (112), the right-hand member of described centre drift pipe (125) is installed with conducting slip ring (121), the dead in line of the wheel shaft of the axis of the conducting ring of described conducting slip ring (121) and primary centre wheel (115), the brush (123) that contacts with conducting slip ring (121) is fixedly mounted on the housing (110) by brush guide frame (124), offer radial hole (119) on the outer circumference surface of described elastic shaft (112), the axial location of described elastic shaft (112) offers the axial hole (120) that is communicated with radial hole (119), described axial hole (120) is communicated with wire guide (118), the holding wire of described sensor is successively by radial hole (119), behind axial hole (120) and the centre drift pipe (125), be connected with the conducting ring (122) on the electric slip ring (121), the output line of described brush (123) is connected with main control unit.
7. the electronic spanner of moment of torsion is decided in numerical control according to claim 5, it is characterized in that: described motor (113) is connected with planetary reducer (114) by the transmission changement, described transmission changement comprises feather key seat (126), the first bevel gear (127), the second bevel gear (128) and the 3rd bevel gear (129), described feather key seat (126) is installed on the wheel shaft of primary centre wheel (115) by feather key, be installed with the first bevel gear (127) and the second bevel gear (128) that are oppositely arranged on the described feather key seat (126), described the 3rd bevel gear (129) is installed in the below of the first bevel gear (127) and the second bevel gear (128), and can mesh with the first bevel gear (127) or the second bevel gear (128), the wheel shaft of described the 3rd bevel gear (129) is in transmission connection by the output shaft of gear and motor (113), on described the first bevel gear (127) and the second bevel gear (128) bevel gear locating rack (130) is installed, the first bevel gear (127) and the second bevel gear (128) are positioned within the bevel gear locating rack (130), the first bevel gear (127) be connected bevel gear (128) and be connected with bevel gear locating rack (130) by bearing, the right-hand member of described bevel gear locating rack (130) is fixedly connected with commutation connecting rod (131), the right-hand member of described commutation connecting rod (131) is provided with reversing hand wheel (132), described reversing hand wheel (132) is installed on the housing (110), and reversing hand wheel (132) is threaded connection with housing (110), offer cannelure on the inner peripheral surface of described reversing hand wheel (132), the right-hand member of described commutation connecting rod (131) is provided with projection, the projection of described commutation connecting rod (131) is positioned at cannelure, and the axis of described reversing hand wheel (132) is parallel with the axis of the wheel shaft of primary centre wheel (115).
8. the electronic spanner of moment of torsion is decided in numerical control according to claim 7, it is characterized in that: described motor (113) adopts high-speed electric expreess locomotive, be provided with stator braking winding (133) in the described motor (113), described relay drive circuit, can be according to the control signal of main control unit output, the break-make in restraining coil loop is finished in the action of control relay movable contact, thus the duty of control stator braking winding (133).
9. the electronic spanner of moment of torsion is decided in numerical control according to claim 6, it is characterized in that: also comprise instrument bin (134), described instrument bin (134) is positioned at the right side of planetary reducer (114), and described electric-control system is installed in the instrument bin (134).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220509623 CN202825674U (en) | 2012-09-27 | 2012-09-27 | Numerical control fixed torque electric wrench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220509623 CN202825674U (en) | 2012-09-27 | 2012-09-27 | Numerical control fixed torque electric wrench |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837283A (en) * | 2012-09-27 | 2012-12-26 | 北京科瑞思创测控科技有限公司 | Numerical-control constant-torque electric spanner |
| CN103894960A (en) * | 2014-04-15 | 2014-07-02 | 上海理工大学 | Multifunctional bolt tightening torque electric calibrator |
| CN108068043A (en) * | 2016-11-18 | 2018-05-25 | 中国铁道科学研究院 | Torque intelligent electric wrench is determined in a kind of numerical control |
-
2012
- 2012-09-27 CN CN 201220509623 patent/CN202825674U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837283A (en) * | 2012-09-27 | 2012-12-26 | 北京科瑞思创测控科技有限公司 | Numerical-control constant-torque electric spanner |
| CN102837283B (en) * | 2012-09-27 | 2015-03-25 | 北京科瑞思创测控科技有限公司 | Numerical-control constant-torque electric spanner |
| CN103894960A (en) * | 2014-04-15 | 2014-07-02 | 上海理工大学 | Multifunctional bolt tightening torque electric calibrator |
| CN103894960B (en) * | 2014-04-15 | 2016-06-29 | 上海理工大学 | The electronic prover of Multifunctional bolt screw-down torque |
| CN108068043A (en) * | 2016-11-18 | 2018-05-25 | 中国铁道科学研究院 | Torque intelligent electric wrench is determined in a kind of numerical control |
| CN108068043B (en) * | 2016-11-18 | 2019-06-21 | 中国铁道科学研究院 | Torque intelligent electric wrench is determined in a kind of numerical control |
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