CN2906576Y - Torque loading device - Google Patents
Torque loading device Download PDFInfo
- Publication number
- CN2906576Y CN2906576Y CN 200620070650 CN200620070650U CN2906576Y CN 2906576 Y CN2906576 Y CN 2906576Y CN 200620070650 CN200620070650 CN 200620070650 CN 200620070650 U CN200620070650 U CN 200620070650U CN 2906576 Y CN2906576 Y CN 2906576Y
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- Prior art keywords
- force
- sensor
- arm
- panel
- moment
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- Expired - Fee Related
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Abstract
The utility model discloses a torque loading device, which comprises a work cabinet, a speed reducing member, a sensor quick connector, a force arm and a stop lever assembly, the speed reducing member is connected with a torque sensor through sensor quick connector, the force arm is arranged on the table top, the stop lever assembly is arranged on the panel of the force arm, the force arm comprises a panel, a square tube and a pedestal through welding. For the force arm, the panel is used as the sliding surface and the square tube as a stiffening member, the stiffness of the force arm is increased by increasing moment of inertia on the cross section of force arm, stop lever does not displace relative to the applied force point of torque wrench, e.g. no sliding friction occurs, the torque sensor is not under action of additional bending moment caused by the sliding friction, so as to reduce error of the measuring system and increase stability of the measuring system, therefore the measurement result of the torque wrench certification systems tends to be consistent.
Description
One. technical field
The utility model relates to the special-purpose calibration equipment of a kind of calibrating or calibration dial torque wrench, specifically relates to the moment of torsion charger in this special use calibration equipment, and it belongs to field of measuring technique and mechanical engineering field.
Two. background technology
Dial torque wrench is the important measurement instrument of control product quality.For guaranteeing the accuracy of dial torque wrench, each enterprise need regularly deliver dial torque wrench through the measurement unit or the metrological service of authorized by state and examine and determine or calibrate.It is the torque wrench system that calibrating or calibration dial torque wrench will use specialized equipment.Torque wrench both domestic and external system can be divided into screw mandrel drive-type and rotation sensor formula by the difference of charger.
The screw mandrel drive-type: sensor maintains static, and drives the arm of force by straight-line screw mandrel, and rotation produces moment of torsion thereby the arm of force drives dial torque wrench, perhaps directly by screw mandrel driving torque spanner.The shortcoming of this equipment be arm of force lever always inevitably with dial torque wrench generation sliding friction, consequent systematic error is big and can't eliminate.If adopt the verification system one-piece construction of screw mandrel drive-type, it is emat sensor more, makes that range can not enlarge, moment of torsion calibrating instrument purposes is narrow, the calibration of instrument and sensor is very difficult.China follows this day present technique that falls behind at present always, mainly produces and use the big screw mandrel drive-type torque wrench system of this systematic error.
The rotation sensor formula: advanced technology is that the torque wrench system is split into three big parts: moment of torsion calibrating instrument, torque sensor, moment of torsion charger, these three big parts are all independently made, can combination in any, sensor can be replaced, and that is to say that range can change.Its arm of force maintains static, and makes sensor rotation by reducing gear, and again by the rotation of sensor strip dynamic torque spanner, but the other end of dial torque wrench stopped by the pin on the arm of force, thereby produces moment of torsion.The measuring equipment of such formation is all used in the laboratory of American-European countries.
The different moment of torsion verification systems of use that occur in view of the many metering mechanisms of China and manufacturing enterprise are examined and determine or are calibrated same dial torque wrench and obtain different measuring error, and use identical moment of torsion calibrating instrument with torque sensor but use different moment of torsion chargers same dial torque wrench to be examined and determine or calibrated the phenomenon that also can obtain different measurement results, applicant is furtherd investigate, find that the moment of torsion charger is the sources of measurement error of torque wrench system maximum and since the structure of moment of torsion charger different with rigidity cause the measurement result of same dial torque wrench different.For rotation sensor formula torque wrench system, the structure of moment of torsion charger and rigidity have determined the measuring error of this system.The poor more then systematic measurement error of charger rigidity is big more.And the production commercial city of countries in the world is just furtherd investigate at instrument with above the sensor, makes great efforts to improve the accuracy of instrument and sensor, has but ignored the systematic error that the moment of torsion charger is produced.
According to the requirement of transmission of quantity value, calibrating or calibration accuracy are that the accuracy of verification system of the dial torque wrench of ± 1% indicating value must be more than ± 0.3% indicating value.The relative error of indicating value of some moment of torsion calibrating instrument reaches ± and 0.05%, the relative error of indicating value of torque sensor is better than ± and 0.25%, can satisfy this requirement fully.But the bad caused systematic error of charger of structure and rigidity usually surpasses ± 1%, have in addition reach ± more than 8%.Select for use the calibrating instrument and the torque sensor of pin-point accuracy to lose practical significance in the case.
For example, the measurement length of the dial torque wrench of a 1500Nm is 1.4m, the acting force that the pinch bar of full load is subjected to is 1071N, measures the different dial torque wrench of handle arrangement on the sensor of different effective lengths, and is as follows by the systematic error η that sliding friction produces:
| The sensor sequence number | L(mm) | η 1 | η 2 |
| 1 | 128 | 1.4％ | 7.3％ |
| 2 | 80 | 0.9％ | 4.6％ |
| 3 | 50 | 0.5％ | 2.9％ |
Annotate: L-sensor effective length in the table;
η
1-dial torque wrench handle is the systematic error of polished rod or annular knurl, friction coefficient mu
1=0.15;
η
2-dial torque wrench handle wraps the systematic error of rubber layer, friction coefficient mu
2=0.8.
Screw mandrel drive-type moment of torsion charger in loading procedure arm of force lever always inevitably with dial torque wrench generation sliding friction, consequent systematic error is big and can't eliminate.
The charger of Britain NORBAR company and U.S. CDI company is the rotation sensor formula, has represented international most advanced level, so its product is analyzed and compared with the utility model.
The arm of force of the charger of NORBAR company is complete cantilever beam structure, and material is the square pipe of the aluminium alloy of the thick 5mm of 60 * 60mm, and the arm of force of the charger of load-bearing capacity 2000Nm reaches 2200mm.Such arm of force is easy to generate than large deflection under loading, and load (moment of torsion) is big more, and the arm of force is long more, and amount of deflection is big more.Load is 1500Nm, the horizontal amount of deflection of the charger arm of force reached 25mm when dial torque wrench measurement length was 1400mm, and (measure length and become 1900mm) measures if dial torque wrench connects extension rod, and this amount of deflection can surpass 40mm.The deflection of the charger arm of force is subjected to displacement the application point of the power of pin on the arm of force and dial torque wrench, and dial torque wrench bears axial friction, causes torque sensor to bear extra moment of flexure, thereby produces measuring error.
Fixedly arm of force ratio of rigidity is better for the twin axle of U.S. CDI company charger, then is the steel plate that a thick 15mm of wide 90mm is about 1000mm but prolong the arm of force, also is cantilever beam structure.The amount of deflection that such arm of force produces under loading is bigger.End at this arm of force is patted gently with the power that hand imposes 3N, can cause that downwarp is moving on the arm of force.Be nowhere near owing to prolong arm of force rigidity, the dial torque wrench bullet take place easily take off accident.
Three. summary of the invention
1, goal of the invention: the purpose of this utility model is to overcome the deficiencies in the prior art, and the integral rigidity by optimal design raising moment of torsion charger makes and sliding friction can not take place between the arm of force and the tested dial torque wrench.
2, technical scheme: a kind of moment of torsion charger described in the utility model, it comprises working cabined, reducing gear, sensor quick connector, the arm of force and pin assembly, described reducing gear links to each other with the sensor quick connector that torque sensor is housed, the pin assembly that is used to support tested dial torque wrench is arranged on the panel of the arm of force, it is characterized in that: the described arm of force that is arranged on the working cabined face is welded by panel, square tube and bearing, panel is arranged on the top of square tube, and bearing is arranged on the bottom of square tube end face and panel and is fixed on the working cabined face.
The arm of force is slipping plane with the panel, and square tube is a reinforcement, improves the rigidity of the arm of force by the moment of inertia that improves arm of force xsect.Because the rigidity of the arm of force of this structure is higher, tangible distortion can not take place in the arm of force under the stress, pin acts on the direction of the reacting force on the dial torque wrench handle, and the axial direction with dial torque wrench is vertical all the time, pin just is not subjected to displacement the force position of dial torque wrench yet, sliding friction does not promptly take place, torque sensor is not subjected to the extra moment of flexure effect that sliding friction thus causes, thereby reduced the measuring system error, increase the stability of measuring system, can make the measurement result trend of each torque wrench system consistent.
Above-mentioned square tube can be the square structure steel pipe that shaped steel, channel-section steel or flanging steel plate are welded.
The sensor quick connector is given torque sensor by spline with the transmission of power of input.Spline is made up of male splined shaft and inner spline housing, and male splined shaft connects with the output shaft of reducing gear, and inner spline housing and torque sensor are connected into integral body, and lay sensor need be with bolted at every turn.By appropriate design, inner spline housing is reliable with connecting of male splined shaft, can not get loose.The pressure angle of spline is 45 °, and this is the spline structure of seldom using, and its automatic centering performance is good.
In addition, reducing gear can be arranged in the working cabined, reducing gear is by the panel of working cabined, wallboard and drawer hide all around, and the arm of force is arranged on the upper face of working cabined, bottom at working cabined also is provided with universal wheel, thereby whole charger and working cabined are combined together, make it is moved very convenient.And the present charger on the market or be manufactured into separate equipment must be placed into during use on table top or the cabinet face, or reducing gear is installed on the table top.
3, beneficial effect: the advantage of the relative prior art of the utility model is: (1) arm of force is slipping plane with the panel, and square tube is a reinforcement, thereby has improved arm of force moment of inertia of cross-section, the corresponding rigidity that improves the arm of force.Sliding friction does not take place between pin on the arm of force and the dial torque wrench, torque sensor is not subjected to the extra moment of flexure effect that sliding friction thus causes, greatly reduce the error of measuring system, increase the stability of measuring system, can make the measurement result trend of each torque wrench system consistent.(2) pressure angle of spline is 45 ° a sensor quick connector, and inner spline housing and sensor are connected into integral body, lays sensor at every turn and need not reach the purpose of quick replacing torque sensor with bolted.By appropriate design, inner spline housing is reliable with connecting of male splined shaft, can not get loose.(3) reducing gear is hidden in working cabined, and charger and working cabined combine together, and reach aesthetic.
Four. description of drawings
Fig. 1 is the structural representation of moment of torsion charger (400Nm-1000Nm),
Wherein 1-working cabined, 2-reducing gear, 3-sensor quick connector, 4-torque sensor, 5-dial torque wrench, 6-moment of torsion calibrating instrument, 7-pin assembly, 8-square tube, 9-bearing, 10-panel, 11-handwheel;
Fig. 2 is the left view of Fig. 1 and Fig. 3;
Fig. 3 is the structural representation of moment of torsion charger (1500Nm-3000Nm).
Fig. 4 is Fig. 3 A-A sectional view.
Five. embodiment
As Fig. 1, Fig. 2 and shown in Figure 4, be an embodiment of the cabinet type moment of torsion charger of the utility model, it comprises working cabined 1, reducing gear 2, sensor quick connector 3, the arm of force, pin assembly 7 and handwheel 11; Reducing gear 2 is arranged on the bottom and is equipped with in the working cabined 1 of universal wheel, and the upper face of working cabined 1 is a table top.Reducing gear 2 links to each other with torque sensor 4 by sensor quick connector 3, the arm of force is arranged on the table top, the pin assembly 7 that is used to support tested dial torque wrench 5 is arranged on the arm of force, the arm of force comprises panel 10, square tube 8 and bearing 9, the square tube 8 that is used to strengthen rigidity is arranged on table top by bearing 9, panel 10 is arranged on the upper surface of square tube 8, and slidably pin assembly 7 is located on the panel 10.
The arm of force that is positioned at the working cabined top bears positive moment of flexure and the xsect moment of torsion that transmits from lever assembly 7, is welded by rectangular steel tube 8, panel 10, bearing 9.Pin assembly 7 can with the panel 10 of square tube 8 welding on horizontally slip and locked.The moment of inertia that the shape of cross section of this arm of force obtains is bigger, add the whole appropriate design of working cabined 1 and reducing gear 2, make that load is 1500Nm, the horizontal maximum defluxion of charger arm of force trail force load position based was 0.04mm when dial torque wrench 5 measurement length were 1400mm, between the pin assembly 7 of charger and the dial torque wrench 5 sliding friction did not take place.The moment of inertia of the xsect of this arm of force by the centre of form is 13 times of the arm of force of the pure square tube of Britain NORBAR company (the thick 5mm of 60 * 60mm) structure, is tabular (8 times (horizontal direction) of the arm of force of xsect 90 * 15mm) structures and 269 times (vertical direction) of U.S. CDI company.
Pin assembly 7 bears the acting force of dial torque wrench 5 and can horizontally slip on the arm of force, can just regulate supporting-point according to the length of dial torque wrench.
The transmission of power that sensor quick connector 3 will manually be imported is given torque sensor 4, and sensor quick connector 3 is made up of torque sensor and inner spline housing, and male splined shaft connects with the output shaft of reducing gear, and inner spline housing connects with torque sensor.The pressure angle of spline is 45 °, and this is the spline structure of seldom using, and its automatic centering performance is good.Inner spline housing and torque sensor 4 become by Bolt Connection after the integral body, can be fast emat sensor more.
Its course of work is: dial torque wrench 5 is placed on the cabinet type charger, regulates pin assembly 7 and make dial torque wrench 5 be in horizontality.With hand traverse handwheel 11 input power, slow down by reducing gear 2, the output shaft of reducing gear 2 is passed to torque sensor 4 on the sensor quick connector 3 with power, drives dial torque wrenches 5 rotations by torque sensor 4.Because the other end (handle) of dial torque wrench 5 is stopped that by the pin assembly 7 on the arm of force 7 pairs of dial torque wrenches 5 of pin assembly apply reacting force and produce moment of torsion.Torque sensor 4 is transferred to moment of torsion calibrating instrument 6 with signal, can measure the torque value that dial torque wrench 5 is born.
All the time the axial direction with dial torque wrench 5 is vertical because the lever on the pin assembly 7 acts on the direction of the reacting force on dial torque wrench 5 handles, obvious distortion does not take place in the pin and the arm of force, pin just is not subjected to displacement the force position of dial torque wrench 5 yet, sliding friction does not promptly take place, torque sensor 4 is not subjected to the extra moment of flexure effect that sliding friction thus causes, has reduced the measuring system error.
Each torque sensor 4 all disposes an inner spline housing and firm with Bolt Connection.Desire more emat sensor, earlier original sensor (together with inner spline housing) is pulled up, again the inner spline housing of another sensor is docked to put in place with male splined shaft and get final product.The spline energy automatic centering of 45 ° of pressure angles makes torque sensor 4 good with the right alignment of reducing gear 2 output shafts.Such connection is very convenient reliable, and more emat sensor does not need to tight a bolt at every turn, so claim that this structure is a quick connector.Reducing gear is installed in the inside of working cabined, hand take turns 11 right hands that are contained in the people with hands down can and height and position, human body sensory is comfortable when making operation.By big speed ratio, manually import power and feel relief, steadily, realize slowly, load exactly.
The arm of force is installed on the top of working cabined 1 (table top), and universal wheel is equipped with in the bottom, and intermediate drawer can be deposited instrument, sensor and data.If the movable cabinet type charger unclamps the brake of universal wheel earlier and just can move.
By the difference of load-bearing capacity, the utility model is divided into 400Nm-1000Nm (see figure 1) and two series of 1500Nm-3000Nm (see figure 3), the former arm of force device busy cashier's office in a shop, the latter's the arm of force has part to stretch out working cabined with cantilever beam structure.
Claims (4)
1, a kind of moment of torsion charger, it comprises working cabined (1), reducing gear (2), sensor quick connector (3), the arm of force and pin assembly (7), described reducing gear (2) links to each other with the sensor quick connector (3) that torque sensor (4) is housed, the pin assembly (7) that is used to support tested dial torque wrench (5) is arranged on the panel (10) of the arm of force, it is characterized in that: describedly be arranged on the arm of force on the table top by panel (10), square tube (8) and bearing (9) are welded, panel (10) is arranged on the top of square tube (8), and bearing (9) is arranged on the end face and panel (10) bottom of square tube (8) and is fixed on working cabined (1) face.
2, moment of torsion charger as claimed in claim 1 is characterized in that: described square tube (8) comprises the square structure steel pipe that shaped steel, channel-section steel or flanging steel plate are welded.
3, moment of torsion charger as claimed in claim 1 or 2, it is characterized in that: described sensor quick connector (3) comprises that inner spline housing connects with torque sensor, male splined shaft connects with the output shaft of reducing gear (2), and inner spline housing becomes a removable integral body with torque sensor (4) with Bolt Connection.
4, moment of torsion charger as claimed in claim 1 or 2 is characterized in that: described reducing gear (2) is located at working cabined (1) the inside, and by the panel of working cabined (1), wallboard and drawer hide all around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070650 CN2906576Y (en) | 2006-03-27 | 2006-03-27 | Torque loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070650 CN2906576Y (en) | 2006-03-27 | 2006-03-27 | Torque loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2906576Y true CN2906576Y (en) | 2007-05-30 |
Family
ID=38115217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620070650 Expired - Fee Related CN2906576Y (en) | 2006-03-27 | 2006-03-27 | Torque loading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2906576Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470041B (en) * | 2007-12-25 | 2010-08-11 | 中国北方车辆研究所 | Pure torque loading apparatus for single-point force exertion |
| CN102288403A (en) * | 2011-08-11 | 2011-12-21 | 浙江宇太汽车零部件制造有限公司 | Tensioning wheel torque test device |
| CN102374923A (en) * | 2010-08-23 | 2012-03-14 | 浙江吉利汽车有限公司 | Torque calibrator for multifunctional wrench |
| CN103728094A (en) * | 2012-10-16 | 2014-04-16 | 金万生 | Electric torque calibrator |
| CN105403357A (en) * | 2015-12-22 | 2016-03-16 | 中国航天空气动力技术研究院 | Fully-automatic contact-screen type torque wrench verification device |
| CN108091222A (en) * | 2018-02-05 | 2018-05-29 | 大连理工大学 | For the rotational stiffness visualization device of Teaching of Structural Mechanics |
| CN109664230A (en) * | 2017-10-16 | 2019-04-23 | 北京安沃科技有限公司 | A kind of portable detachable cantilevered spanner |
-
2006
- 2006-03-27 CN CN 200620070650 patent/CN2906576Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470041B (en) * | 2007-12-25 | 2010-08-11 | 中国北方车辆研究所 | Pure torque loading apparatus for single-point force exertion |
| CN102374923A (en) * | 2010-08-23 | 2012-03-14 | 浙江吉利汽车有限公司 | Torque calibrator for multifunctional wrench |
| CN102374923B (en) * | 2010-08-23 | 2014-06-04 | 浙江吉利汽车有限公司 | Torque calibrator for multifunctional wrench |
| CN102288403A (en) * | 2011-08-11 | 2011-12-21 | 浙江宇太汽车零部件制造有限公司 | Tensioning wheel torque test device |
| CN103728094A (en) * | 2012-10-16 | 2014-04-16 | 金万生 | Electric torque calibrator |
| CN105403357A (en) * | 2015-12-22 | 2016-03-16 | 中国航天空气动力技术研究院 | Fully-automatic contact-screen type torque wrench verification device |
| CN105403357B (en) * | 2015-12-22 | 2018-11-20 | 中国航天空气动力技术研究院 | Full-automatic touch screen type torque wrench tester |
| CN109664230A (en) * | 2017-10-16 | 2019-04-23 | 北京安沃科技有限公司 | A kind of portable detachable cantilevered spanner |
| CN108091222A (en) * | 2018-02-05 | 2018-05-29 | 大连理工大学 | For the rotational stiffness visualization device of Teaching of Structural Mechanics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070530 Termination date: 20100327 |