CN104266793A - Fully-balanced loading system of standard torquer - Google Patents
Fully-balanced loading system of standard torquer Download PDFInfo
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- CN104266793A CN104266793A CN201410580042.7A CN201410580042A CN104266793A CN 104266793 A CN104266793 A CN 104266793A CN 201410580042 A CN201410580042 A CN 201410580042A CN 104266793 A CN104266793 A CN 104266793A
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Abstract
The invention relates to a fully-balanced loading system of a standard torquer. The fully-balanced loading system comprises a lever, and is characterized in that the center of the lever is connected with an output shaft of a rotating motor through a shaft coupler; a detected torque sensor is mounted on the output shaft of the rotating motor; a rotating angle encoder is mounted on the rotating motor; a laser displacement sensor is arranged below the end part of the lever; two end parts of the lever are connected with weight lifting assemblies; each weight lifting assembly comprises a weight lifting platform and a load weight group; a weight position sensor is arranged on one side of each weight lifting platform; each load weight group comprises weights which are stacked in sequence; cavities are formed in the weights; baffles with through holes are arranged above and below each cavity; the adjacent weights are connected with each other through connection rods arranged in the through holes; disks are arranged at two ends of the connection rods; the weights at the uppermost ends are connected with the lever through suspension steel bands; the connection rods can move up and down in the cavities. The fully-balanced loading system of the standard torquer guarantees a balance state of a force arm in a weight loading and unloading process, and the measurement precision of a torque value is improved.
Description
Technical field
The present invention relates to a kind of standard torquer and entirely balance loading system, especially a kind ofly add in uninstall process the loading system ensureing that the arm of force balances entirely at counterweight.
Background technology
Standard torquer, in the development of the national economy, plays the effect of transmission of quantity value and magnitude tracing, is indispensable key equipment in application torque metering calibration operation.Say to a certain extent, the technical merit of torque standard device reflects the height of the torque measurement level of countries and regions.
Moment of torsion is as the major parameter of a mechanics, its importance is by each developed country is paid attention to, developed country (U.S., Britain, France etc.) based on Germany, in the nineties later stage, greatly develop advanced high precision application torque metering standard set-up, to meet the demand of domestic growing civilian and military industrial sector.Industrial country advanced in the world at present, as Germany, Britain, Japan etc. establish the pin-point accuracy standard torquer adopting all kinds of new technique in succession, completes the update of equipment, achieves semi-automation or the full-automation of the work of device testing calibration.
Standard torquer can be roughly divided into the torque standard device of dead weight type safe torque standard device, lever amplification formula torque standard device, reference formula torque standard device and other types according to its design concept.The type of China's standard torquer is more single, with dead weight type safe standard torquer for main Types.Dead weight type safe standard torquer is using the quality of counterweight as scale load, produce standard moment by the effect of arm lever, in a predetermined order automatically, steadily, exactly opplied moment and trimming moment are applied on tested moment of torsion (torsion) sensor by suitable mechanism.The metrology performance of this standard torquer depends on the horizontal controlling extent of counterbalance mass, lever length, lever, counterweight add the important technology indexs such as unloading manner.
Compare with the standard torquer of advanced country in the world, the accuracy of China's standard torquer, reliability and automaticity still have larger gap.Analyze the standard torquer of current China existing type, because counterweight adds unloading steadily, in loading procedure, moment of torsion overshoot is produced to tested sensor.The loading form of standard torquer generally loads (or unloading) → lever unstability → lever with lever balance → counterweight and balances so a kind of recycle design work again, whole loading and lever balance overlong time used, simultaneously because lever is repeatedly unbalance and imbalance angle is excessive, larger friction and destruction are produced to the levers support edge of a knife, not only reduce the sensitivity of lever balance, also reduce the accuracy of standard torquer.The subject matter summed up existing for existing standard torquer can be summarized as:
1, the horizontal control mode defectiveness of lever, control accuracy and poor anti jamming capability, and control ability cannot clearly quantize;
2, counterweight adds unloading steadily, and counterweight positioning system reliability is poor, can accurately not determine the position adding unloading;
3, counterweight is completely unbalance after adding unloading, and arm of force equilibration time is long, inefficiency.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of standard torquer entirely to balance loading system, ensure that standard torquer adds the arm of force equilibrium state in uninstall process at counterweight, improve the measuring accuracy of torque value; Can torsional impact be avoided simultaneously, reduce the equilibration time of the arm of force, improve detection efficiency.
According to technical scheme provided by the invention, a kind of standard torquer balances loading system entirely, comprise lever, feature is: the center of described lever is connected with the output shaft of electric rotating machine by shaft coupling, the output shaft of electric rotating machine installs tested torque sensor, electric rotating machine is installed the anglec of rotation scrambler for measuring electric rotating machine output shaft rotation angle; In the below of the one or both ends of described lever, the laser displacement sensor for measuring lever horizontality is set; Counterweight lift assemblies is connected respectively by suspension steel band at the both ends of described lever, counterweight lift assemblies comprises counterweight lifting platform, counterweight lifting platform arranges load weight group, the counterweight position transducer for detecting counterweight lifting platform height is set in counterweight lifting platform side; Described load weight group comprises multiple counterweight stacked gradually from bottom to up, and the inside of counterweight arranges cavity, cavity be baffle plate up and down, baffle plate arranges through hole; Be connected by the connecting link arranged in through-holes between each counterweight and adjacent counterweight, the two ends of connecting link have the disk protruding from connecting link outer circumference surface; Counterweight is topmost connected with lever by hanging steel band; Connecting link in each counterweight has stroke distances movable up and down in counterweight cavity.
Further, described laser displacement sensor, counterweight position transducer are connected with CPU processor respectively with the output terminal of anglec of rotation scrambler, the output terminal of CPU processor connects counterweight loading motor controller and rotating machine controller, counterweight loading motor controller connects counterweight loading motor driver, the action of counterweight loading motor driver drives counterweight loading motor, rotating machine controller connects electric rotating machine driver, the action of electric rotating machine driver drives electric rotating machine.
Further, described CPU processor connects keyboard and display and data-carrier store.
Further, lever swing stop is symmetrical arranged respectively in the below at the two ends of described lever.
Further, described counterweight lifting platform is connected with the clutch end of counterweight loading motor.
The present invention be the calibrating/calibration of moment of torsion (torsion) sensor provide fast, efficiently, solution and technical foundation accurately, for improving the product quality of sensor further, reduce the testing cost of enterprise, the synthesized competitiveness of improving product, improve the level of whole sensing industry, promote the manufacturing development of China's automation equipment and enter world's rank of advanced units to provide advantage.Meanwhile, the manufacturing lifting of sensor, will indirectly drive the development of industry-by-industry technology, the increase of security performance, the raising of work efficiency, will produce fabulous economic and social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of full balance loading system of the present invention.
Fig. 2 is the A direction view of Fig. 1.
Fig. 3 is the theory diagram of described full balance loading system.
Fig. 4 is described load weight group height coordinate change schematic diagram in loading procedure.
Fig. 5 is the process flow diagram adopting step-by-step movement load mode.
Fig. 6 is the process flow diagram adopting continous way load mode.
Embodiment
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in Figure 1 to 4: described standard torquer entirely balances loading system and comprises lever 1, laser displacement sensor 2, load weight group 3, counterweight position transducer 4, counterweight lift assemblies 5, anglec of rotation scrambler 6, electric rotating machine 7, tested torque sensor 8, shaft coupling 9, lever swing stop 10, hang steel band 11, counterweight 12, connecting link 13, baffle plate 14, counterweight loading motor 15, CPU processor 16, counterweight loading motor controller 17, rotating machine controller 18, counterweight loading motor driver 19, electric rotating machine driver 20, keyboard and display 21, data-carrier store 22, counterweight lifting platform 23 etc.
As shown in Figure 1 and Figure 2, the present invention includes lever 1, the center of lever 1 is connected with the output shaft of electric rotating machine 7 by shaft coupling 9, the output shaft of electric rotating machine 7 is installed tested torque sensor 8, electric rotating machine 7 is installed the anglec of rotation scrambler 6 for measuring electric rotating machine 7 output shaft rotation angle; Arrange laser displacement sensor 2 in the below of the one or both ends of described lever 1, laser displacement sensor 2 is for measuring the horizontality of lever 1; Counterweight lift assemblies 5 is connected respectively by suspension steel band 11 at the both ends of described lever 1, counterweight lift assemblies 5 comprises counterweight lifting platform 23, counterweight lifting platform 23 is connected with the clutch end of counterweight loading motor 15, counterweight loading motor 15 is for providing counterweight lifting platform 23 to rise or the power of descending motion, counterweight lifting platform 23 arranges load weight group 3, arrange counterweight position transducer 4 in counterweight lifting platform 23 side, counterweight position transducer 4 is for detecting the height of counterweight lifting platform 23;
As shown in Figure 3, described laser displacement sensor 2, counterweight position transducer 4 are connected with CPU processor 16 respectively with the output terminal of anglec of rotation scrambler 6, the output terminal of CPU processor 16 connects counterweight loading motor controller 17 and rotating machine controller 18, counterweight loading motor controller 17 connects counterweight loading motor driver 19, counterweight loading motor driver 19 drives counterweight loading motor 15 action, rotating machine controller 18 connects electric rotating machine driver 20, and electric rotating machine driver 20 drives electric rotating machine 7 action; Described CPU processor 16 connects keyboard and display 21 and data-carrier store 22;
As shown in Figure 4, described load weight group 3 comprises multiple counterweight 12 stacked gradually from bottom to up, and the inside of counterweight 12 arranges cavity, cavity be baffle plate 14 up and down, baffle plate 14 arranges through hole; Be connected by the connecting link 13 arranged in through-holes between each counterweight 12 and adjacent counterweight 12, the two ends of connecting link 13 connect the disk protruding from connecting link 13 outer circumference surface respectively; Counterweight topmost 12 is connected with lever 1 by hanging steel band 11; Each connecting link 13 has stroke distances movable up and down in counterweight 12 cavity;
As shown in Figure 2, be symmetrical arranged lever swing stop 10 respectively in the below at the two ends of described lever 1, in order to limit the amplitude of fluctuation of lever 1; The amplitude of fluctuation general control of described lever 1 is within the up and down stroke distances of connecting link 13, thus operationally, when the counterweight lift assemblies of lever 1 one end uses, the counterweight lift assemblies of the other end can not impact, and does not also work;
As shown in Figure 4, x=0, x=x
11, x=x
12, x=x
21, x=x
22for coordinate when counterweight lift assemblies 3 is in different conditions; (1) during coordinate figure x=0, lever 1 is in initial level state, and counterweight 12 is sequentially stacked on the counterweight 12 of downside, is suspended from counterweight 12 cavity of the top with the disk hanging connecting link 13 lower end that steel band 11 is connected; When counterweight lift assemblies 5 declines, coordinate figure by 0 to x
11, x
12, x
21, x
22increase progressively; (2) as coordinate figure x=x
11time, the baffle plate 14 of load weight group 3 counterweight 12 cavity internal upper part topmost with the disk contact hanging connecting link 13 lower end that steel band 11 is connected, i.e. x
11for the idle motion distance of the top counterweight 12, now the counterweight 12 of the top is stacked on second counterweight 12, and do not have displacement, the object of idle motion distance leaves space to make lever 1 have freely to swing up and down; (3) as coordinate figure x=x
12time, counterweight 12 topmost departs from second counterweight 12 under the traction of hanging steel band 11, the weight of counterweight 12 is topmost carried on lever 1 completely, the disk connecting connecting link 13 lower end of topmost counterweight 12 and second counterweight 12 is suspended from the cavity of second counterweight 12, is that second counterweight 12 leaves idle motion distance; (4) when counterweight lift assemblies 5 continues to decline, by coordinate x
12reach coordinate figure x
21time, connect counterweight 12 topmost and contact with the baffle plate 14 of second counterweight 12 cavity internal upper part with the disk of connecting link 13 lower end of second counterweight 12, now second counterweight 12 is still stacked on the 3rd counterweight 12, i.e. x
21it is the idle motion distance of second counterweight 12; (5) as coordinate figure x=x
22time, by connection second counterweight 12 with under the traction of the connecting link 13 of the top counterweight 12, second counterweight 12 and the 3rd counterweight 12 depart from, the heavily reason of counterweight 12 topmost and second counterweight 12 is carried on lever 1 completely, the disk connecting connecting link 13 lower end of second counterweight 12 and the 3rd counterweight 12 is suspended from the cavity of the 3rd counterweight 12, is that the 3rd counterweight 12 leaves idle motion distance; (6), when counterweight lift assemblies 5 declines further, counterweight can be carried on lever 1 successively.
The course of work of the present invention: tested torque sensor 8, when torque load zero load, under lever 1 is in equilibrium state, is fixed on electric rotating machine 7 output shaft, balances lever by (1); Balancing instructions is inputted by keyboard and display 21, horizontality parameter+y or-y(the lever 1 that laser displacement sensor 2 detects lever 1 upwards time be+y, lever 1 is-y time downward), and this parameter is sent to CPU processor 16, CPU processor 16 according to this state modulator electric rotating machine 7 to left-handed or to dextrorotation (when lever 1 horizontality parameter is+y, electric rotating machine is to anticlockwise, and angle is-α; When lever 1 horizontality parameter is-y, electric rotating machine is to anticlockwise, and angle is+α), make lever 1 come back to equilibrium position, and by anglec of rotation scrambler 6 zero setting;
(2) according to the needs detected, suppose that test point is respectively M
1=20Nm, M
2=40Nm, M
3=60Nm, M
4=80Nm and M
5=100Nm five torque measurement points, and the torque value that each counterweight 12 loads rear generation is 20Nm; Adopt the counterweight lift assemblies 5 of lever 1 left end, the counterweight lift assemblies 5 of lever 1 right-hand member does not work.
First measurement point M
1loading procedure as shown in Figure 5: during original state, y=0, x=0, α=0, n=1, n are that counterweight loads number of times; Counterweight loading motor 15 works, and is declined reposefully by counterweight lifting platform 23 to realizing step-by-step movement and load three times, each load after the coordinate figure x=x of counterweight lifting platform 23
11+ na(a is the displacement that counterweight loads once), as n=3, x=x
12; When counterweight lift assemblies position is by x
11to x
12during decline, lever 1 horizontality parameter y changes trend-y, CPU processor 16 by the continuous horizontality parameter gathering lever 1 of laser displacement sensor 2, after CPU processor 16 computing, instruction occurs makes electric rotating machine 7 rotate to+α direction, makes horizontality parameter y to 0 change; When the reading value of counterweight position transducer 4 is x
12time, namely the counterweight 12 of the top is in complete loading position, and counterweight lifting platform 23 stops declining; Meanwhile, when the lever 1 horizontality parameter that laser displacement sensor 2 gathers meets the equilibrium condition of lever 1, electric rotating machine 7 stops the rotation; Now, first measurement point M
1loading completes, and by the loading of the top counterweight 12 and the collection of anglec of rotation scrambler 6 data, CPU processor 16 obtains the relevant windup-degree α of torque sensor 8 tested to this
1.
Second measurement point M
2, the 3rd measurement point M
3, the 4th measurement point M
4with the 5th measurement point M
5measurement, adopt the method identical with first measurement point, load counterweight 12 successively, and keep the equilibrium state of lever 1 by the rotation of electric rotating machine 7.
In view of torque sensor utilizes the elastic deformation characteristic of metal material to manufacture and design, therefore there is good linear feature, therefore in order to reach the object making lever Fast-Balance, in the loading procedure of second test point to the 5th test point, adopt the loading control method of electric rotating machine continuous rotation compensation adjustment again.Be divided into again at a slow speed in continuous rotation, (with at a slow speed relative to quick) step of rotating at a slow speed again fast, the primary general control of the anglec of rotation is at a slow speed at 15 ~ 20% of predetermined windup-degree α, fast rotational angle general control 80 ~ 90% of predetermined windup-degree α, more at a slow speed anglec of rotation general control about 90 ~ 98% of predetermined windup-degree α.After continuous rotation again compensation adjustment until lever meets equilibrium condition.Specifically as shown in Figure 6, during original state, y=0, x=x
(j-1) 2, α=α
j-1, wherein, j is the sequence number of measurement point, j ≠ 1; Counterweight loading motor 15 works, and carries out continuous rotation, and after loading, the coordinate of counterweight lifting platform 23 is x=x
j2the anglec of rotation is α at a slow speed for the first time
11=(0.15 ~ 0.20) × M
j× α
j-1/ M
j-1, second time fast rotational angle is α
12=(0.80 ~ 0.90) × M
j× α
j-1/ M
j-1, the anglec of rotation is α at a slow speed for the third time
13=(0.95 ~ 0.98) × M
j× α
j-1/ M
j-1, wherein, M
jfor the torque value of jth time measurement point; After counterweight lifting platform 23 stops decline, electric rotating machine 7 compensates adjustment again, and as-y >+y, electric rotating machine 7 rotates to+α direction; As-y <+y, electric rotating machine 7 rotates to-α direction, and to make y trend towards 0, electric rotating machine stops the rotation; Now measurement point M
jloading completes, and by the loading of counterweight and the collection of anglec of rotation scrambler, CPU processor obtains new for relevant windup-degree α that is this tested torque sensor
j.
Affecting one of principal element of the uncertainty of standard torquer is the uncertainty that lever (arm of force) levelness causes.For high-precision standard torquer, for improving the sensitivity of lever balance, lever supporting bearing friction torque is very little, makes the equilibrium process of lever slow.Do not possess the standard torquer of full balance loading system, because lever swings up and down repeatedly unbalance and imbalance angle is excessive, also easily cause electric rotating machine ceaselessly left rotation and right rotation, equilibration time is longer.Therefore, loading system of the present invention adopts two kinds of control modes: one is in the loading of first measurement point, and counterweight lift assemblies is from coordinate x
11to coordinate x
12for stepping loads, the object of stepping is avoid counterweight to load to cause lever imbalance angle excessive, to the torsional impact of detected torque sensor, also be convenient to the reading of lever horizontality parameter and the multilevel iudge with front parameter, control electric rotating machine and rotate progression with certain angle, until horizontal parameters y tend to 0(now state be the horizontal pre-adjustment of lever), when stepping several times load after, then counterweight is loaded into coordinate x continuously
12, now electric rotating machine finally adjusts until lever meets equilibrium condition; Two is in follow-up loading, counterweight lift assemblies in the loading of continuous and stable (as from x
12~ x
22, x
22~ x
32...), electric rotating machine have employed at a slow speed, fast, at a slow speed array mode rotate to (95 ~ 98) about % of predetermined torsion angle values, then compensation adjustment is until lever meets equilibrium condition.Adopt the object rotated at a slow speed at a slow speed, fast, again, be consider that load weight has just been in loading state, the reading value of counterweight position transducer is at x
21or slightly larger than x
21time, the unexpected fast rotational of electric rotating machine, can produce torsional impact, therefore adopts the rotation at a slow speed with counterweight lift assemblies coordinate synchronization; Secondary rotation is at a slow speed swinging up and down, for follow-up compensation adjustment as early as possible provides condition to equilibrium state for reduction lever.
The present invention has following characteristics: (1) configuration counterweight loading motor and detected sensor rotation motor, adopt scrambler and control system, be in for the purpose of horizontality by the arm of force, in the process loading counterweight, control the lift height of counterweight and the anglec of rotation of detected sensor, realize the full servo loading of counterweight; (2) laser displacement sensor and servomotor is adopted to form closed-loop control, the equilibrium state of the continuous detection arm of force, and by the servocontrol to torque motor, make in the Positioning Precision Control micro-scaled range of the arm of force, realize the full servo balance of lever, improve the measuring accuracy of torque value; (3) add unloading to carry out with balance simultaneously, make the arm of force be in horizontality all the time, avoid torsional impact, reduce the equilibration time of the arm of force, improve detection efficiency.
Claims (5)
1. a standard torquer balances loading system entirely, comprise lever (1), it is characterized in that: the center of described lever (1) is connected with the output shaft of electric rotating machine (7) by shaft coupling (9), the output shaft of electric rotating machine (7) is installed tested torque sensor (8), at the upper anglec of rotation scrambler (6) installed for measuring electric rotating machine (7) output shaft rotation angle of electric rotating machine (7); In the below of the one or both ends of described lever (1), the laser displacement sensor (2) for measuring lever (1) horizontality is set; Counterweight lift assemblies (5) is connected respectively by suspension steel band (11) at the both ends of described lever (1), counterweight lift assemblies (5) comprises counterweight lifting platform (23), counterweight lifting platform (23) arranges load weight group (3), the counterweight position transducer (4) for detecting counterweight lifting platform (23) height is set in counterweight lifting platform (23) side; Described load weight group (3) comprises multiple counterweight (12) stacked gradually from bottom to up, and the inside of counterweight (12) arranges cavity, cavity be baffle plate (14) up and down, (14) arrange through hole to baffle plate; Be connected by the connecting link (13) arranged in through-holes between each counterweight (12) with adjacent counterweight (12), the two ends of connecting link (13) have the disk protruding from connecting link (13) outer circumference surface; Counterweight (12) is topmost connected with lever (1) by hanging steel band (11); Connecting link (13) in each counterweight (12) has stroke distances movable up and down in counterweight (12) cavity.
2. standard torquer as claimed in claim 1 balances loading system entirely, it is characterized in that: described laser displacement sensor (2), counterweight position transducer (4) is connected with CPU processor (16) respectively with the output terminal of anglec of rotation scrambler (6), the output terminal of CPU processor (16) connects counterweight loading motor controller (17) and rotating machine controller (18), counterweight loading motor controller (17) connects counterweight loading motor driver (19), counterweight loading motor driver (19) drives counterweight loading motor (15) action, rotating machine controller (18) connects electric rotating machine driver (20), electric rotating machine driver (20) drives electric rotating machine (7) action.
3. standard torquer as claimed in claim 2 balances loading system entirely, it is characterized in that: described CPU processor (16) connects keyboard and display (21) and data-carrier store (22).
4. standard torquer as claimed in claim 1 balances loading system entirely, it is characterized in that: be symmetrical arranged lever swing stop (10) respectively in the below at the two ends of described lever (1).
5. standard torquer as claimed in claim 1 balances loading system entirely, it is characterized in that: described counterweight lifting platform (23) is connected with the clutch end of counterweight loading motor (15).
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| CN107576447A (en) * | 2017-08-24 | 2018-01-12 | 南京航空航天大学 | Automatic leveling formula lever force standard machines and leveling method |
| CN107677401A (en) * | 2017-09-27 | 2018-02-09 | 盘锦凯瑞能源有限公司 | A kind of marine drilling platform jacking system raising torque-measuring apparatus |
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| CN109752176A (en) * | 2019-03-08 | 2019-05-14 | 苏州东菱科技有限公司 | A kind of self-balancing inclination Swaying Test Platform |
| CN110487479A (en) * | 2019-09-23 | 2019-11-22 | 中航电测仪器股份有限公司 | A kind of torque sensor detection device and method |
| CN112098077A (en) * | 2020-09-15 | 2020-12-18 | 中车戚墅堰机车车辆工艺研究所有限公司 | Comprehensive performance test system for coupler |
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| CN112577666A (en) * | 2020-12-30 | 2021-03-30 | 陕西金飞马测控技术有限公司 | Verification and calibration device and method for torque wrench verification instrument |
| CN113340524A (en) * | 2020-06-02 | 2021-09-03 | 河南牛帕力学工程研究院 | Torque standard machine |
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| CN106500908A (en) * | 2016-12-16 | 2017-03-15 | 广电计量检测（北京）有限公司 | Angle can revise torque lever device |
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| CN107328521B (en) * | 2017-08-17 | 2023-09-22 | 常州检验检测标准认证研究院 | Dead weight reference integrated torque standard machine |
| CN107576447A (en) * | 2017-08-24 | 2018-01-12 | 南京航空航天大学 | Automatic leveling formula lever force standard machines and leveling method |
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| CN107782518A (en) * | 2017-10-25 | 2018-03-09 | 威凯检测技术有限公司 | A kind of servomotor static rigidity detection means |
| CN108168496A (en) * | 2017-11-14 | 2018-06-15 | 上海葆专自动化科技有限公司 | Angle regulating device for seat of vehicle angle torque measuring device |
| CN109752176A (en) * | 2019-03-08 | 2019-05-14 | 苏州东菱科技有限公司 | A kind of self-balancing inclination Swaying Test Platform |
| CN110487479A (en) * | 2019-09-23 | 2019-11-22 | 中航电测仪器股份有限公司 | A kind of torque sensor detection device and method |
| CN112326107A (en) * | 2019-09-24 | 2021-02-05 | 尚廷东 | Torque standard machine |
| CN113340524B (en) * | 2020-06-02 | 2023-02-28 | 郑州东辰科技有限公司 | Torque standard machine |
| CN113340524A (en) * | 2020-06-02 | 2021-09-03 | 河南牛帕力学工程研究院 | Torque standard machine |
| CN112098077A (en) * | 2020-09-15 | 2020-12-18 | 中车戚墅堰机车车辆工艺研究所有限公司 | Comprehensive performance test system for coupler |
| CN112577666A (en) * | 2020-12-30 | 2021-03-30 | 陕西金飞马测控技术有限公司 | Verification and calibration device and method for torque wrench verification instrument |
| CN114018456A (en) * | 2021-11-03 | 2022-02-08 | 湖北三江航天万山特种车辆有限公司 | Torque measuring device is arranged in automobile-used gear box area |
| CN114018456B (en) * | 2021-11-03 | 2024-03-26 | 湖北三江航天万山特种车辆有限公司 | Vehicle gear box belt torque measuring device |
| CN114264406A (en) * | 2021-12-29 | 2022-04-01 | 绍兴市肯特机械电子有限公司 | Self-calibration couple type torque standard machine, self-calibration method and torque testing method thereof |
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Effective date of registration: 20221117 Address after: 214101 No. 8, Dongting Chunxin East Road, Xishan District, Wuxi City, Jiangsu Province Patentee after: Wuxi inspection and Certification Institute Address before: 214101 spring new East Road, Xishan District, Wuxi, Jiangsu Province, No. 8 Patentee before: WUXI METERING DETECTING TEST CENTER |