CN201945843U

CN201945843U - Torque loading controller

Info

Publication number: CN201945843U
Application number: CN2010206077767U
Authority: CN
Inventors: 陈则煌; 黄克强
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2010-11-12
Filing date: 2010-11-12
Publication date: 2011-08-24
Anticipated expiration: 2020-11-12

Abstract

The utility model discloses a torque loading controller. A first rolling bearing and a second rolling bearing are arranged at two ends of the worm screw respectively, a driving wheel is connected with an output shaft of a stepping motor, a driven wheel is arranged on the worm screw, the driven wheel and a turbine are arranged between the first rolling bearing and the second rolling bearing, a connector is arranged at one end of a turbine shaft, a third rolling bearing is arranged on the turbine shaft and between the connector and the turbine. The first rolling bearing, the second rolling bearing and the third rolling bearing are fixedly connected with corresponding bearing bases respectively. Each bearing base is fixedly connected with a fixing support. A force sensor is fixed on a second rolling bearing base or the fixing support and contacted closely with the second rolling bearing base and the fixing support, a central axis of the worm screw penetrates through a geometric center of the force sensor. A pair of proximity sensors is fixed on the fixing support and above the turbine. A signal-outputting end of a singlechip controlling circuit is connected with an input end of the stepping motor, and a signal-inputting end of the singlechip controlling circuit is connected with a signal-outputting end of the force sensor and signal-outputting ends of the pair of the proximity sensors respectively.

Description

The moment of torsion loading control

Technical field

The utility model is to be applied in the Industry Control, realizes that moment of torsion loads, measures and control.

Background technology

In mechanical engineering technical field, engineering research, product development, production supervision, quality control and performance test etc. all be unable to do without to be measured and control technology.Wherein the measurement of moment of torsion is a requisite content in the work such as development research, quality inspection, safety and optimal control of various engineering goods with control, and the core technology of torque measurement is exactly the torque sensing technology.Survey moment of torsion at present and mainly adopt two kinds of methods: one, go up and paste foil gauge,, calculate the torque of transmission again by corresponding strain formula because of torque produces the foil gauge strain at tested mechanical rotation axle (flexible member).This classic method of pasting foil gauge on axle is simple, easy operating, yet, paste the method for foil gauge and use the influence that is subjected to several factors on engineering, can its measurement result be that foil gauge produces distortion back changes in resistance, correctly reflect the certain condition of size requirements of moment of torsion, such as pasting creep and slippage, strain resistor increment and stress relation stability, temperature effect etc., this makes the measurement of moment of torsion have certain error; Two: use torque sensor, it has the precision height, and frequency response is fast, good reliability, advantages such as life-span length.But it costs an arm and a leg, and volume is bigger, is of a size of 134mm * 238mm as the NH-901 torque sensor (500NM) of Xinda, Waja, and weight is 6.1KG, is fit to install and fix use, is not suitable as portable torsion-testing instrument and uses.Aspect the moment of torsion Loading Control, conventional method is an other mounting torque sensor on the torque loader output shaft, after the measured data process of torque sensor PC processing, feed back to torque loader, change the output of moment of torsion, increased the cost of equipment so undoubtedly, not only be inconvenient to carry, used nor be suitable as moment of torsion load tester device in enormous quantities.

The utility model content

The purpose of this utility model provides a kind of simple in structure, compact small size moment of torsion loading control.

For achieving the above object, the technical scheme that the utility model is taked is: this moment of torsion loading control comprises stepper motor, intermeshing driving wheel and engaged wheel, turbine, worm screw, first rolling bearing, clutch shaft bearing seat, second rolling bearing, second bearing seat, fixed support, force transducer, a pair of proximity sensor, turboshaft, single chip machine controlling circuit, the 3rd rolling bearing, the 3rd bearing seat and hookup; First rolling bearing and second rolling bearing are installed in the two ends of worm screw respectively; Driving wheel connects with the output shaft of stepper motor, and engaged wheel is installed on the worm screw, turbine and worm mesh, and engaged wheel and turbine are located between first rolling bearing and second rolling bearing; Hookup is installed on the end of the turboshaft of turbine, and the 3rd rolling bearing is installed on the turboshaft, and the 3rd rolling bearing is between hookup and turbine; First rolling bearing and clutch shaft bearing seat are fixedly connected, and second rolling bearing and second bearing seat are fixedly connected, and the 3rd rolling bearing and the 3rd bearing seat are fixedly connected; Clutch shaft bearing seat, second bearing seat, the 3rd bearing seat are fixedly connected with support respectively; Force transducer is fixedly installed on second bearing seat or the support and with second bearing seat and closely contacts with support, and the central axis of worm screw passes the geometric center of force transducer; A pair of proximity sensor is fixed on the support and is positioned at the top of turbine; The signal output part of single chip machine controlling circuit links to each other with the input end of stepper motor, and the signal input part of single chip machine controlling circuit links to each other with the signal output part of force transducer, the signal output part of a pair of proximity sensor respectively.

Compared with prior art, the beneficial effects of the utility model are:

One, use turbine and worm and gear set gear train to realize the transmission of moment of torsion, can realize big ratio of gear, and because worm and gear and gear set compact conformation, therefore can allow total system compact conformation, volume little, be easy to assembling.

Two, use high-precision force transducer to calculate output torque, avoided using the torque sensor of large volume, further reduced the total system volume, and force transducer precision height, frequency response are fast, good reliability, thereby guarantee whole measuring system precision height, fast, the good reliability of frequency response.

Three, use the control of microcontroller embedded system, have that charactron shows in real time, the input of small-sized 4 * 4 keyboards, be easy to observation, simple to operation, use the slewing area of the proximity sensor definition turbine of position adjustable, can prevent that moment of torsion output from exceeding the slewing area of measured device.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cutaway view Amplified image of Fig. 1;

Fig. 3 is the single chip machine controlling circuit theory diagram;

1. clutch shaft bearing seat, 2. first rolling bearing, 3. worm screw, 4. engaged wheel, 5. second rolling bearing, 6. second bearing seat, 7. force transducer, 8. fixed support, 9. turbine, the 10. first proximity sensor, 11. turboshafts, 12. second proximity sensors, 13. driving wheel, 14. stepper motors, 15. single chip machine controlling circuits, 16. the 3rd bearing seat, 17. the 3rd rolling bearings, 18. hookups, 19. first sleeve, 20. second sleeves, 21. the 3rd sleeves.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

As shown in Figure 1, because driving wheel 13 connects with the output shaft of stepper motor 14, use flat key that engaged wheel 4 is mounted on the worm screw 3, worm screw 3 will be rotated together along with engaged wheel 4, and moment of torsion is delivered on the worm screw 3 from engaged wheel 4 by flat key, turbine 9 is installed with worm screw 3 engagements, moment of torsion can be delivered on the turbine 9 from worm screw 3, be separately installed with first rolling bearing 2 and second rolling bearing 5 at the two ends of worm screw 3, engaged wheel 4 and turbine 9 are located between first rolling bearing 2 and second rolling bearing 5.Turboshaft 11 adopts flat keys to fix with turbine 9, guarantee that turboshaft 11 does not have with turbine 9 to relatively rotate, and moment of torsion can be delivered on the turboshaft 11 from turbine 9, and thus, stepper motor 14 can pass to moment of torsion turboshaft 11 and realize moments of torsion output.What turbine 9 adopted is the part turbine, takes place as fortuitous event, just separates with worm shaft behind the turbine rotation certain angle, can realize self-protection.A pair of proximity sensor is installed: the first proximity sensor 10 and the second proximity sensor 12 above turbine 9.Described proximity sensor can be photoelectric sensor, eddy current sensor etc.When turbine 3 turns to the first proximity sensor 10 and the second proximity sensor, 12 belows, the first proximity sensor 10 and the second proximity sensor 12 can detect and transmit signal to single chip machine controlling circuit 15 by output line, and the detection signal of the first proximity sensor 10 and the second proximity sensor 12 can be determined the reference position and the final position of turbine 9 thus; By adjusting the first proximity sensor 10 and the second proximity sensor 12 position, just can adjust the reference position and the final position of turbine 9, with the slewing area of restriction turbine 9 with respect to turbine 9.

First rolling bearing 2 is fixedly connected with clutch shaft bearing seat 1, and second rolling bearing 5 and second bearing seat 6 are fixedly connected.Be installed in first sleeve 19 on the worm screw 3 and fit tightly first rolling bearing, 2 right side inner rings, be installed in second sleeve 20 on the worm screw 3 and fit tightly second rolling bearing, 5 left side inner rings, can guarantee that like this first rolling bearing 2 and second rolling bearing 5 all do not have relative displacement in the axial direction with worm screw 3, clutch shaft bearing seat 1, second bearing seat 6 are installed on the fixed support 8, and the assurance worm screw only rotates and does not have axially-movable.By these structures, the worm screw 3 and second bearing seat 6 can not slide in the axial direction, when worm screw 3 axially loadeds, just power can be delivered on second bearing seat 6.Force transducer 7 is installed on second bearing seat 6 or the fixed support 8, force transducer 7 is fitted tightly between second bearing seat 6 and fixed support 8 and with second bearing seat 6 and fixed support 8, and the central axis that makes worm screw 3 geometric center that can pass force transducer 7, so when worm screw 3 axially loadeds, force transducer 7 will be subjected to the extruding of second bearing seat 6, and the output of correspondent voltage signal is just arranged.Moment of torsion when output arranged when stepper motor 14 thus, force transducer 7 can measure the axial force F of worm screw 3, and the output line by force transducer 7 passes to single chip machine controlling circuit 15 with axial force F.Force transducer 7 can use C2 pressure type force transducer of the extra small pad list of the LBS die mould force transducer of U.S. interface company, German HBM company etc.

As shown in Figure 2, the end of the turboshaft 11 of turbine 9 is equipped with hookup 18, the 3rd rolling bearing 17, the three rolling bearings 17 is installed on the turboshaft 11 between hookup 18 and turbine 9, and the 3rd rolling bearing 17 and the 3rd bearing seat 16 are fixedly connected; The 3rd sleeve 21 is installed on the turboshaft 11, and between the 3rd rolling bearing 17 and hookup 18, the 3rd sleeve 21 and the 3rd rolling bearing 17 inner rings fit tightly, the 3rd bearing seat 16 and support 8 fixed installations, upper end and turboshaft 11 at hookup 18 use flat key to fix, guarantee that turboshaft 11 and hookup 18 concentrics also can only rotate, and it is detachable, the convenient hookup that various sizes are installed, the lower end of hookup 18 is promptly as moment of torsion output usefulness, the device that needs the moment of torsion input can be installed, and hookup 18 can customize various profiles and size according to actual needs.

As shown in Figure 3, single chip machine controlling circuit 15 comprise carry analog-to-digital 8051 type single-chip microcomputers, charactron, 4 * 4 keyboards, storer and with the supporting stepper motor driver of stepper motor 14.Carry analog-to-digital 8051 type single-chip microcomputers, can use the STC12C5A60S2 of STC Corporation, the AT89C51AC2 of atmel corp etc.; Storer generally is EEPROM, FLASH storer etc.; Stepper motor and supporting driver can use Cisco to match 57 stepper motors and the two-phase hybrid stepping motor driver HB-5030M of company, 57 stepper motors of Lei Sai company and stepper motor driver M415B etc.Wherein, the common IO pin that carries analog-to-digital 8051 type single-chip microcomputers is connected with the signal output part of control end, gating pulse input end, direction signal input end and the first proximity sensor 10 of the IO pin of charactron input end, 4 * 4 keyboard output ends, storer, the supporting driver of stepper motor and the signal output part of the second proximity sensor 12 respectively; The signal output part of the supporting driver of stepper motor links to each other with the signal input part of stepper motor 14; The signal output part of force transducer 7 with carry analog-to-digital 8051 type single-chip microcomputer modulus signal input IO pin and be connected.

After force transducer 7 measures the axial force F of worm screw 3, output be voltage signal, this signal demand transforms into digital quantity through carrying analog-to-digital 8051 type single-chip microcomputers.Carry analog-to-digital 8051 type single-chip microcomputers and obtain the digital quantity of axial force F, calculate according to the moment of torsion formula again, can obtain the moment of torsion M that stepper motor 14 is exported, show by charactron again according to corresponding power-voltage ratio relation.4 * 4 keyboard output signals are ordered after carrying analog-to-digital 8051 type single-chip microcomputers decoding accordingly, are used for starting or stoping stepper motor 14, strengthen or reduce the moment of torsion output of stepper motor 14, the rotation direction of control step motor.Carry analog-to-digital 8051 type single-chip microcomputers and judge the reference position and the final position of turbine 9 by the output signal of the first proximity sensor 10 and the second proximity sensor 12, by control, prevent that turbine 9 from exceeding reference position and the final position that sets to stepper motor 14.The data of memory stores are moment of torsion and stepper motor 14 gating pulse corresponding datas, carry analog-to-digital 8051 type single-chip microcomputers and can export corresponding torque as requested by calling these data.

Claims

1. a moment of torsion loading control is characterized in that: comprise stepper motor (14), intermeshing driving wheel (13) and engaged wheel (4), turbine (9), worm screw (3), first rolling bearing (2), clutch shaft bearing seat (1), second rolling bearing (5), second bearing seat (6), fixed support (8), force transducer (7), a pair of proximity sensor, turboshaft (11), single chip machine controlling circuit (15), the 3rd rolling bearing (17), the 3rd bearing seat (16), hookup (18); First rolling bearing (2) and second rolling bearing (5) are installed in the two ends of worm screw (3) respectively; Driving wheel (13) connects with the output shaft of stepper motor (14), and engaged wheel (4) is installed on the worm screw (3), turbine (9) and worm screw (3) engagement, and engaged wheel (4) and turbine (9) are located between first rolling bearing (2) and second rolling bearing (5); Hookup (18) is installed on the end of the turboshaft (11) of turbine (9), and the 3rd rolling bearing (17) is installed on the turboshaft (11), and described the 3rd rolling bearing (17) is positioned between hookup (18) and the turbine (9); First rolling bearing (2) is fixedly connected with clutch shaft bearing seat (1), and second rolling bearing (5) is fixedly connected with second bearing seat (6), and the 3rd rolling bearing (17) is fixedly connected with the 3rd bearing seat (16); Clutch shaft bearing seat (1), second bearing seat (6), the 3rd bearing seat (16) are fixedly connected with fixed support (8) respectively; Force transducer (7) is fixedly installed in second bearing seat (6) or fixed support (8) upward and with second bearing seat (6) closely contacts the geometric center that the central axis of described worm screw (3) passes described force transducer (7) with fixed support (8); Described a pair of proximity sensor is fixed in the top that turbine (9) were gone up and be positioned to fixed support (8); The signal output part of single chip machine controlling circuit (15) links to each other with the input end of described stepper motor (14), and the signal input part of single chip machine controlling circuit (15) links to each other with the signal output part of described force transducer (7), the signal output part of a pair of proximity sensor respectively.