CN110044543B - Torque sensor calibration device - Google Patents
Torque sensor calibration device Download PDFInfo
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- CN110044543B CN110044543B CN201810037239.4A CN201810037239A CN110044543B CN 110044543 B CN110044543 B CN 110044543B CN 201810037239 A CN201810037239 A CN 201810037239A CN 110044543 B CN110044543 B CN 110044543B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
- G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a torque sensor calibration device, which comprises a balance beam connected with a rotating shaft, wherein weight seats are arranged at two ends of the balance beam, and the rotating shaft is provided with a connecting part which can be selectively connected with or disconnected from an input shaft system of equipment to be tested along the axial direction of the rotating shaft; the device also comprises a gear transmission group consisting of an input gear and an output gear which are meshed with each other, wherein the diameter of the output gear is larger than that of the input gear, and a first connecting part and a second connecting part for transmitting torsional force are respectively arranged at two ends of a rotating shaft of the output gear; the rotating shaft of the output gear can be selectively connected with the output shaft system of the first calibration side of the equipment to be tested through the first connecting component, or connected with the output shaft system of the second calibration side of the equipment to be tested through the second connecting component, or not connected.
Description
Technical Field
The invention relates to the technical field of detection and measurement, in particular to a torque sensor calibration device.
Background
In power train assembly test equipment such as gearboxes and engines, a torque sensor is typically mounted on the drive train to monitor the actual test torque of the test piece. In particular, when testing an automatic gearbox, torque sensors are mounted on both the input and output shafts (non-rigid coupling is provided between the input and output of the automatic gearbox).
The torque sensor is usually used as a measuring tool, and the torque sensor is usually calibrated once every half year according to the principle of periodic checking and calibration of the measuring tool. Zero drift, accuracy, linearity, and repeatability of calibration torque sensors are generally required. And then compensating the error of the torque sensor by software according to the calibration result.
Currently, the calibration of a torque sensor generally adopts a lever structure, as shown in fig. 1. The balance weight is mainly composed of a weight 11, a weight seat (mainly realized by a tray 14), a balance beam 12, a level 13 and the like.
The principle of lever calibration is to apply a specified torque to the shaft by adding standard weight blocks of different weights and then by the lever arm length. The single weight is generally below 10KG, so that the labor intensity of a person is reduced during calibration operation. When no weight is added, the balance beam and the weight seat need to be kept balanced, namely no torque is applied to the rotating shaft system; and the balance beam is adjusted to be horizontal according to the level meter, so that calibration errors caused by non-horizontal balance beams are avoided.
Because the measuring ranges of the torque sensors are different, the measuring ranges of the torque sensors are different in different use occasions. For testing an automobile power assembly or a power component, the test torque of production line test equipment is generally smaller and is lower than 2 KNm; on laboratory test equipment, the test torque is larger and can reach 5KNm. The torque calibration directions during testing are bidirectional calibration, on one hand, the linearity and repeatability of the torque sensor are considered, so that the design of the balance beam needs to be considered under the condition that the space is enough, the arm length of the balance beam is enough to reduce the weight and the number of weights.
The current calibration method by adopting the balance beam mainly has the following defects:
1. when the calibration torque is larger, the number of weights is excessive due to the balance Liang Guochang, and the space required to be calibrated is larger;
2. when the calibration torque is larger, the number of the needed weights is larger, and when the calibration torque is 5KNm, the number of the weights is too large, so that the labor intensity of personnel is not reduced;
3. in the case of bidirectional calibration, under certain specific conditions, the bidirectional calibration cannot be implemented due to insufficient space, and the lever is designed into a one-way lever, so that the two-way calibration cannot be balanced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the torque sensor calibration device which occupies a small space and can calibrate a large torque by using a small weight.
The technical problems to be solved by the method can be implemented by the following technical schemes.
The torque sensor calibration device comprises a balance beam connected with a rotating shaft, wherein weight seats are arranged at two ends of the balance beam; the device also comprises a gear transmission group consisting of an input gear and an output gear which are meshed with each other, wherein the diameter of the output gear is larger than that of the input gear, and a first connecting part and a second connecting part for transmitting torsional force are respectively arranged at two ends of a rotating shaft of the output gear; the rotating shaft of the output gear can be selectively connected with the output shaft system of the first calibration side of the equipment to be tested through the first connecting component, or connected with the output shaft system of the second calibration side of the equipment to be tested through the second connecting component, or not connected.
As a preferred embodiment of the present invention, the output gear is positioned on an eccentric disc and maintains the adjustability of the meshing backlash of the input gear and the output gear as the eccentric disc rotates.
As a further improvement of the technical scheme, the pressure angle of the meshing gear pair consisting of the input gear and the output gear is 10-15 degrees.
As a further improvement of the technical scheme, the connecting part is a flat key or a spline.
As a further improvement of the technical scheme, the first connecting part is a flat key or a spline; the second connecting part is a flat key or a spline.
As a further development of the solution, the balance beam is provided with one or more adjusting balance weights for compensating or fine-tuning the weight of the weight, which can be moved back and forth along the body of the balance beam.
The torque sensor calibration device adopting the technical scheme has the following advantages compared with the prior art:
1. the labor intensity of the calibration personnel is obviously reduced, and the weight quantity and the weight are obviously reduced;
2. the calibration of a plurality of shafting is realized by one-time clamping;
3. the requirement of the calibration space is obviously reduced, and an ultra-long balance beam and a large number of weights are not used;
4. obviously reduce weight type and quantity, input and output standard time weight type is only one, realizes input and output weight sharing. When the existing scheme is calibrated, as the output torque is large, larger weight and more weight quantity are needed;
drawings
FIG. 1 is a schematic diagram of a conventional torque sensor calibration device;
FIG. 2 is a schematic diagram of a gear-based torque sensor calibration device of the present invention;
FIG. 3 is a schematic side view of a gear-based torque sensor calibration device of the present invention;
FIG. 4 is a cross-sectional view (partial) of a gear-based torque sensor calibration device of the present invention;
FIG. 5 is a schematic connection structure diagram of a torque sensor calibration device based on gear transmission and calibration equipment;
in the figure: 1-weight seat 2-balance beam 3-input shaft 4-left output spline 5-right output spline 6-output gear 7-input gear 8-input spline 9-eccentric disc 10-adjusting balance weight 11-weight 12-cross beam 13-level 14-tray 15-input torque sensor 16-output torque sensor
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
The torque sensor calibration device based on gear transmission as shown in fig. 2 to 5 is formed by adding a pair of gears to mesh on the basis of lever calibration to amplify the torque, thereby realizing the purpose of calibrating larger torque with fewer weights.
The balance beam 2 is provided with weight seats 1 at two ends, the balance beam 2 is provided with a rotary shaft position input shaft 3, the input shaft 3 is connected with an input gear 7 in a shaft mode, an output gear 6 with a larger radius is meshed with the input gear 7, and a left output spline 4 and a right output spline 5 are arranged on an output shaft of the output gear 6.
The output gear 6 and the input gear 7 form a group of gear pairs, and the transmission ratio of the gear pairs is i. When the input shaft 3 is subjected to torque calibration, the output shaft (namely the rotating shaft of the output gear 6) is not in butt joint (namely no load), and an input shaft system of calibrated equipment is required to be connected with an input spline 8 in the figure; at the moment, the torque calibration strategy is the same as that of the existing scheme, weights are respectively added on the two weight seats in turn, and torque calibration is achieved.
When the output torque is required to be calibrated, the input shafting is disconnected, and the output shafting on the side required to be calibrated is connected with the corresponding spline (namely the left output spline 4 or the right output spline 5). And then sequentially adding or reducing weights on the weight seats respectively, so that the torque value born by the output shaft can be calculated. The method comprises the following steps:
T＝∑m·g×l×i
wherein T is a torque value, m is the weight of the weight, g is the gravitational acceleration, l is the arm length, i is the length from the axle center to the weight, and i is the transmission ratio of the gear pair.
Because the radius of the output gear in the gear set is larger than that of the input gear, the torque is amplified, and therefore the larger torque can be calibrated by fewer weights. Of course, similar labor-saving mechanisms using gear engagement transmission can be used, such as involute teeth and similar structures of arc-shaped teeth.
As shown in fig. 5, it is also illustrated that the input torque sensor 15 is connected to the drive bearing and the output torque sensor 16 is connected to the load bearing, wherein the input torque sensor 15 is connected to the drive bearing. The input torque sensor 15 is calibrated by a weight, and the output torque sensor 16 is calibrated by the input torque sensor calibration result. The calibration principle is as follows, the output shaft system is locked, then torque is applied through the input motor, and thus the input and output torque sensors have measurement results at the same time. The two are compared, so that the aim of calibrating the output torque sensor can be fulfilled.
In addition, the calibration shafting does not need to adopt a spline, and the butt joint part of the input shafting and the output shafting does not need to adopt a spline, for example, an end face flat key, 2 or more common flat keys and the like are adopted.
In addition, the device also relates to a technology for eliminating the backlash between the input gear and the output gear, and bidirectional torque calibration is required in the torque calibration process. The device mainly adjusts the meshing backlash of the two meshing gears by changing the center distance between the input shaft and the output shaft. An eccentric disc 9 is arranged between the output spline and the output gear, and the adjustment of the central distance of the gear pair is realized by adjusting the gesture of the eccentric disc, so that the aim of adjusting the gear meshing side gap is fulfilled;
meanwhile, in the structure of the device, the pressure angle of the meshing gear pair is not 20 degrees of the standard pressure angle, and in order to improve the calibration precision, the pressure angle of the gear is reduced to 10-15 degrees in the structure. The pressure angle is reduced mainly because positive pressure components on the gear tooth profiles are reduced in the transmission process, so that relative sliding friction force between the two gear tooth profiles is reduced, and calibration errors are effectively reduced.
On the other hand, the balance beam 2 is further provided with an unbalance adjustment balance weight 10 for eliminating manufacturing errors of the balance beam and the weight seat, and the balance weight is realized through fine adjustment of back and forth movement.
The invention provides a method for selectively transmitting (or not transmitting) torsion generated by an input shaft or an output shaft to a target calibration shaft, further utilizes the amplification effect of gear transmission, realizes the control of space size, and achieves the purpose of calibrating a plurality of shaft systems by once clamping.
Claims (6)
1. The torque sensor calibration device comprises a balance beam connected with a rotating shaft, wherein weight seats are arranged at two ends of the balance beam; the device also comprises a gear transmission group consisting of an input gear and an output gear which are meshed with each other, the rotating shaft is connected with the input gear in a shaft way, the diameter of the output gear is larger than that of the input gear, and the two ends of the rotating shaft of the output gear are respectively provided with a first connecting part and a second connecting part for transmitting torsional force; the rotating shaft of the output gear can be selectively connected with the output shaft system of the first calibration side of the equipment to be tested through the first connecting component, or connected with the output shaft system of the second calibration side of the equipment to be tested through the second connecting component, or not connected.
2. The torque sensor calibration device of claim 1 wherein said output gear is positioned on an eccentric disc and maintains the backlash of said input gear and said output gear adjustable as said eccentric disc rotates.
3. The torque sensor calibration device according to claim 1, wherein a pressure angle of a meshing gear pair consisting of the input gear and the output gear is 10 to 15 °.
4. The torque sensor calibration device of claim 1, wherein the connecting member is a flat key or spline.
5. The torque sensor calibration device of claim 1, wherein the first connection member is a flat key or spline; the second connecting part is a flat key or a spline.
6. The torque sensor calibration device according to claim 1, wherein the balance beam is provided with one or more adjustment balance weights for compensating or fine-tuning the weight of the weight and movable back and forth along the body of the balance beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037239.4A CN110044543B (en) | 2018-01-15 | 2018-01-15 | Torque sensor calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037239.4A CN110044543B (en) | 2018-01-15 | 2018-01-15 | Torque sensor calibration device |
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| CN110044543A CN110044543A (en) | 2019-07-23 |
| CN110044543B true CN110044543B (en) | 2024-01-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595684A (en) * | 2019-10-21 | 2019-12-20 | 吉林大学 | Torque calibration device for linear motor loading |
| CN111678538B (en) * | 2020-07-29 | 2023-06-09 | 中国电子科技集团公司第二十六研究所 | Dynamic level error compensation method based on speed matching |
| CN114088291B (en) * | 2021-11-29 | 2023-11-21 | 黄山市万邦电子科技有限公司 | Mandrel coefficient calibration device of torque sensor |
| CN114993552A (en) * | 2022-05-24 | 2022-09-02 | 上海顺试汽车科技有限公司 | Torque sensor calibration device |
Citations (10)
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|---|---|---|---|---|
| GB828355A (en) * | 1957-03-15 | 1960-02-17 | Napier & Son Ltd | Transmission gearing including means for measuring torque |
| GB839794A (en) * | 1958-04-08 | 1960-06-29 | Fairweather Harold G C | Improvements in gear train testing apparatus |
| US4805464A (en) * | 1988-01-29 | 1989-02-21 | Consolidated Devices, Inc. | Dial torque wrench structure |
| EP1642052A1 (en) * | 2003-07-08 | 2006-04-05 | Zeroshift Limited | Transmission system |
| EP1696216A1 (en) * | 2005-02-25 | 2006-08-30 | Abb Ab | Method and device for measuring torque in a robot |
| WO2010142318A1 (en) * | 2009-06-08 | 2010-12-16 | Abb Technology Ab | A device for measuring torque |
| KR20110075727A (en) * | 2009-12-28 | 2011-07-06 | 전자부품연구원 | Device and method of calibrating torque sensor for robot joint |
| CN105675207A (en) * | 2016-03-04 | 2016-06-15 | 武汉船用机械有限责任公司 | Calibration method for torque sensors in climbing gears of marine drilling platform lifting system |
| CN205371370U (en) * | 2015-12-13 | 2016-07-06 | 吉林东光集团有限公司 | Car automatic control clutch operating mechanism |
| CN207730380U (en) * | 2018-01-15 | 2018-08-14 | 上海华依科技集团股份有限公司 | A kind of torque sensor calibrating device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6766708B2 (en) * | 1997-08-18 | 2004-07-27 | Eddie L. Brooks | Gear ratio multiplier |
| GB2475322B (en) * | 2009-11-17 | 2012-02-22 | Crane Electronics | Variable torque rate test joint |
-
2018
- 2018-01-15 CN CN201810037239.4A patent/CN110044543B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB828355A (en) * | 1957-03-15 | 1960-02-17 | Napier & Son Ltd | Transmission gearing including means for measuring torque |
| GB839794A (en) * | 1958-04-08 | 1960-06-29 | Fairweather Harold G C | Improvements in gear train testing apparatus |
| US4805464A (en) * | 1988-01-29 | 1989-02-21 | Consolidated Devices, Inc. | Dial torque wrench structure |
| EP1642052A1 (en) * | 2003-07-08 | 2006-04-05 | Zeroshift Limited | Transmission system |
| EP1696216A1 (en) * | 2005-02-25 | 2006-08-30 | Abb Ab | Method and device for measuring torque in a robot |
| WO2010142318A1 (en) * | 2009-06-08 | 2010-12-16 | Abb Technology Ab | A device for measuring torque |
| KR20110075727A (en) * | 2009-12-28 | 2011-07-06 | 전자부품연구원 | Device and method of calibrating torque sensor for robot joint |
| CN205371370U (en) * | 2015-12-13 | 2016-07-06 | 吉林东光集团有限公司 | Car automatic control clutch operating mechanism |
| CN105675207A (en) * | 2016-03-04 | 2016-06-15 | 武汉船用机械有限责任公司 | Calibration method for torque sensors in climbing gears of marine drilling platform lifting system |
| CN207730380U (en) * | 2018-01-15 | 2018-08-14 | 上海华依科技集团股份有限公司 | A kind of torque sensor calibrating device |
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