CN102192814A - Dead weight type standard force source device for cam type independent weight loading and unloading - Google Patents
Dead weight type standard force source device for cam type independent weight loading and unloading Download PDFInfo
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- CN102192814A CN102192814A CN2010101276627A CN201010127662A CN102192814A CN 102192814 A CN102192814 A CN 102192814A CN 2010101276627 A CN2010101276627 A CN 2010101276627A CN 201010127662 A CN201010127662 A CN 201010127662A CN 102192814 A CN102192814 A CN 102192814A
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Abstract
The invention relates to a device for detecting, experimenting and calibrating a dynamometer, in particular to a dead weight type standard force source device for cam type independent weight loading and unloading. The device comprises main parts such as a machine frame, an electrically driven mechanism for the cam type independent weight loading and unloading, a central suspender, a set of weights, a cam type anti-sway device, a moving crossbeam, a guide post, a reverse rack, lead screws, and the like, wherein the set of the weights are arranged on a supporting rod. In view of the problems existing in the traditional technology, the invention overcomes the defects, such as complexity, difficulty in processing, higher cost, worse rigidity, instability of force value exertion, and the like of the dead weight type standard force source weight loading/unloading mechanism in the prior art; and the invention provides the dead weight type standard force source device for the cam type independent weight loading and unloading.
Description
Technical field
The present invention relates to the detection test and the caliberating device of a kind of dynamometer (being generally load sensor), a kind of cam-type of saying so more specifically independently adds unloads counterweight dead weight formula proof force source apparatus.
Background technology
Sensor is to be used for directly or indirectly and measurand is got in touch, measured parameter (non electrical quantities such as machinery, physics, chemistry, pressure, temperature) is changed into the signal that can directly measure (being easy to amplify the electric signal with long-distance transmissions usually), and it provides the necessary raw information of handling and make a strategic decision for system.Therefore, it is the key link in the modern detection system.The information correctness that sensor obtains directly influences the precision of total system.If sensor errors is big, the precision of metering circuit, amplifier and the microprocessor of back level is high more also to be futile.As seen, high-quality sensor is the basis of modern production.
Along with the appearance of various sensor, require production metrological service that it is tested comprehensively and accurately, examines and determine, and provide consistent reliable technique index.And in the test of sensor, evaluation, calibration process, force standard machines is that force measuring machine is its key equipment.Therefore force standard machines is as the important step of power value transmission system, in important metrological service of country, scientific research department, dynamometer production and the widespread use of the department of use.But traditional Dead Weigh Force Standard Machine exists extremely problems such as inconvenience of work efficiency is difficult to improve, counterweight adds release mechanism complex structure, the working service that cost is too high, counterweight adds release mechanism that counterweight adds release mechanism, the more important thing is that can't satisfy new national standard and international standard detects the requirement add the unloaded time to dynamometer at all, this has restricted the development of research and production of dynamometer and the progress of measurement technology greatly.
Develop novel force standard machines at this situation, use new structural principle, advanced control technology to attempt to solve the problem that force standard machines exists, meet the need of market.
In first to file, application number is 200810051182.X in the prior art, and denomination of invention is unloaded counterweight dead weight formula proof force source apparatus for independently adding.Dead Weigh Force Standard Machine counterweight load/unload mechanism structure in the prior art is too complicated although above-mentioned patent has solved basically, processing too difficulty, efficient is too low, cost is too high and be difficult to realize the shortcoming and defect of robotization, but have certain shortcoming, be in particular in:
1., counterweight electric driving mechanism in this patent, employing be eccentric wheel structure, this structure needs twice eccentric processing just can machine at least, so this mechanism is complicated, difficulty, cost are higher in processing.Because the eccentric wheel outer rim is set with rolling bearing, the outer collar bearing of rolling bearing is connected with the following workplace contact of slide block.So when the motor-driven eccentric wheel rotates, the following workplace contacting points position of cover rolling bearing and slide block thereon is constantly variation, the perpendicular left-right symmetric of the variation range of this contacting points position and drive motor shaft centre line, the size of the variation range of this contacting points position is directly proportional with the eccentric throw of eccentric wheel center with respect to drive motor axle center.If the eccentric wheel center is d with respect to the eccentric throw at drive motor axle center, the workplace contacting points position variation range size that then is enclosed within rolling bearing on the eccentric wheel and slide block is 2d.Therefore the position that affacts the application point of the acting force on the slide block workplace with the contacted rolling bearing of slide block workplace also is constantly to change, can not be by load/unload stably thereby make by the counterweight of slider support, and then be unfavorable for the precision that the power value applies, more be unfavorable for shortening the time of stable reading; Moreover eccentric wheel to support integral rigidity little, workplace contacting points position variation range excessive (being 2d), it is excessive that slide block bears unbalance loading, is difficult to guarantee that level adds unloads counterweight.
2., antiswing device in this patent, mainly form by two identical driving motors, two identical eccentric wheels and two rolling bearings, its described lower end of hanging is inserted between two rolling bearings, is connected or breaks away from two rolling bearings contacts.So be applied to when hanging on the bar when counterweight, owing to hang freely swinging or rocking of bar, make two impacts that rolling bearing can be subjected to hanging bar of antiswing device, this impact is delivered on each eccentric wheel that is connected by rolling bearing, finally is directly delivered on each coupled drive motor axle by eccentric wheel again.So because antiswing device adopts single-ended cantilever support, so integral rigidity is little, motor shaft can produce distortion when being subjected to hanging the bar bump, thereby further has influence on the life-span of drive motor itself, and then has increased the maintenance cost of equipment; Moreover,, be unfavorable for bringing into play anti-sway function so eccentric wheel can produce axial float when being subjected to hanging the axial impact of bar because eccentric wheel adopts snap ring to fix.
3., the guidepost guidance quality and the poor rigidity of passing the moving beam center on prior art and the above-mentioned upper plate on the first to file mid frame, be unfavorable for the precision that applies of power value.
Summary of the invention
The present invention is directed to existing technology existing problems, overcome in the prior art that dead weight formula proof force source counterweight load/unload mechanism is complicated, processing difficulty, cost is higher, rigidity is relatively poor, the power value applies than shortcomings such as instabilities, provide a kind of cam-type independently to add and unload counterweight dead weight formula proof force source apparatus.
The object of the present invention is achieved like this, and this device comprises frame, independently adds and unload counterweight electric driving mechanism, center suspension rod, one group and be arranged on counterweight on the support bar, antiswing device, moving beam, guidepost, oppositely frame, leading screw etc.Described independently adding, unload the counterweight electric driving mechanism and comprise the cam that is arranged on the drive motor, be installed in the minor axis in the counterweight bracket slot, be installed in the bearing on the minor axis, described cam the axle center line and counterweight carriage left-right symmetric center line in same plane, be provided with, the symcenter face of cam thickness and bearing shaft to the symcenter face be provided with on same plane; Described antiswing device comprises and is connected on the drive motor and is arranged on camshaft in the pedestal, the camshaft that connects and be symmetricly set on the pedestal opposite side by synchronous band, be symmetricly set on two V-blocks between two camshafts, be connected the recovery spring between each V-block and the pedestal; Pass the moving beam center on the upper plate above the described frame and be symmetrically arranged with four guideposts and two rhizoid thick sticks, four guidepost right-angled intersection diagonal angles are provided with, and two rhizoid thick sticks are symmetricly set between two guideposts in front and back.
The present invention is owing to adopt said structure to have the following advantages and good effect:
1, cam-type of the present invention independently adds unloads the bearing that contacts with the cam outer rim in the counterweight electric driving mechanism, it is fixed on the interior minor axis of counterweight bracket slot, thereby make by drive motor by the power of camming action to the bearing, affact minor axis via bearing, affact on the counterweight carriage by minor axis at last, because minor axis is fixed, stress point is bearing on the minor axis and the contact point on the cam, thereby the position of action point that makes the counterweight carriage be subjected to cam drive power can not change in twice eccentric throw (2d) scope as in formerly applying for a patent, but the position of action point of power is constant at all, so that the load/unload of counterweight is more steady, this mechanism more helps the precision that applies of power value.Simultaneously the counterweight carriage is supported by cam and since the cam rigidity apply for a patent than in the past in eccentric rigidity big, so whole load-bearing capacity increases, integral rigidity increases.Moreover the expansion of cam mechanism makes that counterweight load/unload structure is simpler, compacter, processing and manufacturing is simple more, cost reduces greatly.
2, the anti-swinging mechanism of cam-type of the present invention; because two camshaft two ends are by bearings; thereby make the rigidity of mechanism improve greatly; more helping drive motor in the protection mechanism is not subjected to or is come from the impact of hanging bar less; thereby help the motor raising in serviceable life, reduced the maintenance cost of equipment simultaneously.
3, pass the moving beam center on the upper plate above the frame of the present invention and be symmetrically arranged with four guideposts and two rhizoid thick sticks, four guidepost right-angled intersection diagonal angles are provided with, and two rhizoid thick sticks are symmetricly set between two guideposts in front and back.Four guideposts have further improved the rigidity of equipment simultaneously in the guidance quality that increases system, help the precision that applies of power value greatly.
Description of drawings
Fig. 1 is that cam-type independently adds and unloads counterweight dead weight formula proof force source apparatus one-piece construction synoptic diagram.
Fig. 2 is the cut-open view that cam-type of the present invention independently adds the structure of unloading the counterweight electric driving mechanism.
Fig. 3 is that cam-type of the present invention independently adds and unloads counterweight electric driving mechanism A to perspective view.
Fig. 4 is an invention cam-type antiswing device structure cut-open view.
Fig. 5 is that invention cam-type antiswing device B is to perspective view.
Fig. 6 is that cam-type independently adds and unloads counterweight dead weight formula proof force source apparatus superstructure front view.
Fig. 7 is that cam-type independently adds and unloads counterweight dead weight formula proof force source apparatus superstructure C perspective view.
Embodiment
Below in conjunction with accompanying drawing the present invention is done detailed description:
Consult Fig. 1, shown in the figure be a range be 10KN cam-type independently add and unload counterweight dead weight formula proof force source apparatus.This device include frame 9, independently add unload counterweight electric driving mechanism 6, center suspension rod 11, one group be arranged on counterweight 7 on the support bar, antiswing device 12, moving beam 2, guidepost 3, oppositely frame 4, leading screw 5 etc.Described independently adding, unload counterweight electric driving mechanism 6 and comprise the cam 19 that is arranged on the drive motor 22, be installed in the minor axis 17 in counterweight carriage 16 grooves, be installed in the bearing 18 on the minor axis 17, the center line and the counterweight carriage 16 left-right symmetric center lines of the axle of described cam 19 are provided with in same plane, and the symcenter face of cam 19 thickness and bearing 18 axial symcenter faces are provided with on same plane; Described antiswing device 12 comprises and is connected on the drive motor 34 and is arranged on camshaft 37 in the pedestal 39, by connect and be symmetricly set on the camshaft 38 of pedestal 39 opposite sides synchronously with 27, be symmetricly set on two V-blocks 33 between two camshafts, be connected the recovery spring 40 between each V-block 33 and the pedestal 39; Pass moving beam 2 centers on the upper plate 14 above the described frame 9 and be symmetrically arranged with four guideposts 3 and the setting of 5, four guideposts of two leading screws, 3 right-angled intersection diagonal angles, two rhizoid thick sticks 5 are symmetricly set between two guideposts 3 in front and back.
Four channel-section steels or column 9, upper plate 14 and lower shoe 13 formed inner spaces are used for holding standard test weight in the 10KN proof force source apparatus, have 13 counterweights in the 10KN proof force source apparatus, wherein 9 of 1KN counterweights, 1 of 0.5KN counterweight, 2 of 0.2KN counterweights, 1 of 0.1KN counterweight; The center suspension rod is 0.1KN, can be used as a counterweight.Equipment rack channel-section steel or column 9 are mainly used to the stationary cam formula and independently add and unload counterweight mechanism 6, every counterweight is equipped with two cover cam-types and independently adds and unload counterweight mechanism 6 in the device, and the adding of every counterweight 7 unloads the cam-type that these counterweight 7 correspondences are all arranged and independently add and unload counterweight mechanism 6 and finish and add unloading.Equipment cam-type when not working independently adds the cam that unloads counterweight mechanism 6 and is positioned at peak, and the counterweight carriage 23 of mechanism 6 contacts with the support bar 8 of counterweight 7, and the total weight of counterweight 7 independently adds by cam-type and unloads counterweight mechanism 6 and support; During equipment work, part or all counterweight 7 independently adds by cam-type and unloads counterweight mechanism 6 and be loaded into automatically on the center suspension rod 11 as required, the support bar 8 of the counterweight 7 that is loaded is separated with the counterweight carriage 16 of mechanism 6, thereby makes the gravity of counterweight 7 be applied on the tested dynamometer 1 by center suspension rod 11.
Cam-type independently adds unloads counterweight electric driving mechanism 6 and mainly is made up of fixed support 23, drive motor 22, motor mount 21, cam 19, bearing 20, counterweight carriage 16, bearing 18, minor axis 17, linear bearing 24 and guidepost 25.Drive motor 22 is fixedly mounted on the motor mount 21, and motor mount 21 is fixedly mounted on equipment rack channel-section steel or the column 9; Match with the motor shaft of drive motor 22 and be connected in cam 19 1 end centers; Cam 19 1 ends are supported by bearing 20; The outer rim of cam 19 contacts with the outer rim of ball bearing 18; Bearing 18 is fixedly mounted on the minor axis 17; Minor axis 17 is fixedly mounted on the counterweight carriage 16; The both sides symmetry is equipped with 24, two linear bearings 24 of two linear bearings and cooperates with two guideposts 25 respectively on the counterweight carriage 16; Guidepost 25 is fixedly mounted on the fixed support 23; Fixed support 23 is fixedly mounted on frame channel-section steel or the column 9.
Pass moving beam 2 centers on the upper plate 14 above the frame 9 and be symmetrically arranged with four guideposts 3 and the setting of 5, four guideposts of two leading screws, 3 right-angled intersection diagonal angles, two rhizoid thick sticks 5 are symmetricly set between two guideposts 3 in front and back.Moving beam 2 move up and down the tension and compression space that can adjust tested dynamometer, carry the gravity of counterweight 7 simultaneously.Add and unload before the counterweight moving beam 2 and drive tested dynamometer 1 and rise to upperly, and then finish adding of counterweight 7 and unload, counterweight 7 is all after the unloading, moving beam 2 drive again tested dynamometer 1 drop to the next, thereby unload tested dynamometer 1.
Add when unloading counterweight, microcomputor program sends instruction as required automatically to switching value output control card, switching value output control card is controlled the control solid-state relay that corresponding cam-type independently adds the drive motor 22 that unloads counterweight electric driving mechanism 6, make and control the solid-state relay closure, thereby drive motor 22 runnings, cam-type independently add unload counterweight electric driving mechanism 6 counterweight carriage 16 under the driving of drive motor 22, do rectilinear motion up and down reciprocatingly along guidepost 25, and then realize that counterweight adds unloading.The last the next of counterweight carriage 16 detected by two optoelectronic switches up and down, and counterweight carriage 16 the next optoelectronic switch when the next signals to the microcomputer switching value and imports control card; Counterweight carriage 16 upper optoelectronic switch when upper signals to microcomputer switching value input control card; The signal that stops to lean on microcomputor program read switch amount to import control card of drive motor 22 is controlled.
Simultaneously in order to improve the precision that the power value applies, shorten the time of stable reading, in equipment bay 13 centers cam-type antiswing device 12 is installed, insert between two V-blocks 33 of cam-type antiswing device 12 suspension rod 11 lower ends in center, and the clamping of two V-blocks 33 makes center suspension rod 11 be held tightly and unclamp with unclamping.This device adds at counterweight 7 earlier to be held center suspension rod 11 tightly before unloading, and counterweight 7 adds and unloads before the reading of data that finishes, and center suspension rod 11 is unclamped again.
Claims (1)
1. a cam-type independently adds and unloads counterweight dead weight formula proof force source apparatus, it comprises moving beam (2), guidepost (3), reverse frame (4), leading screw (5), independently add and unload counterweight electric driving mechanism (6), one group of counterweight (7) that is arranged on the support bar, frame (9), center suspension rod (11), antiswing device (12), it is characterized in that: described independently adding, unload counterweight electric driving mechanism (6) and comprise the cam (19) that is arranged on the drive motor (22), be installed in the minor axis (17) in counterweight carriage (16) groove, be installed in the bearing (18) on the minor axis (17), the center line and counterweight carriage (16) the left-right symmetric center line of the axle of described cam (19) are provided with in same plane, and the axial symcenter face of the symcenter face of cam (19) thickness and bearing (18) is provided with on same plane; Described antiswing device (12) comprises that being connected drive motor (34) goes up and be arranged on the interior camshaft (37) of pedestal (39), the camshaft (38) that connects and be symmetricly set on pedestal (39) opposite side by synchronous band (27), be symmetricly set on two V-blocks (33) between two camshafts, be connected the recovery spring (40) between each V-block (33) and the pedestal (39); Pass moving beam (2) center on the upper plate (14) above the described frame (9) and be symmetrically arranged with four guideposts (3) and two leading screws (5), four guideposts (3) right-angled intersection diagonal angle is provided with, and two rhizoid thick sticks (5) are symmetricly set between two guideposts in front and back (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101276627A CN102192814B (en) | 2010-03-19 | 2010-03-19 | Dead weight type standard force source device for cam type independent weight loading and unloading |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101276627A CN102192814B (en) | 2010-03-19 | 2010-03-19 | Dead weight type standard force source device for cam type independent weight loading and unloading |
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| CN102192814A true CN102192814A (en) | 2011-09-21 |
| CN102192814B CN102192814B (en) | 2012-11-07 |
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| CN2010101276627A Expired - Fee Related CN102192814B (en) | 2010-03-19 | 2010-03-19 | Dead weight type standard force source device for cam type independent weight loading and unloading |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344501A (en) * | 2013-07-20 | 2013-10-09 | 中国水利水电科学研究院 | Large geotechnical triaxial creep test system |
| CN103884367A (en) * | 2014-02-14 | 2014-06-25 | 宜兴市三维电气制造有限公司 | Discrete center hanging dead weight type loading device |
| CN106353671A (en) * | 2015-07-17 | 2017-01-25 | 苏州杰锐思自动化设备有限公司 | Knocking head for knocking test and knocking test device |
| CN106644260A (en) * | 2017-01-25 | 2017-05-10 | 福建省计量科学研究院 | 2MN dead load overlapping composite-type force standard machine |
| CN106679786A (en) * | 2016-12-22 | 2017-05-17 | 湖北省计量测试技术研究院 | Verification device of static weight and superposition composite hook scale |
| CN108896398A (en) * | 2018-08-31 | 2018-11-27 | 中国航天空气动力技术研究院 | A kind of dynamic calibration equipment generating negative step load |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344501A (en) * | 2013-07-20 | 2013-10-09 | 中国水利水电科学研究院 | Large geotechnical triaxial creep test system |
| CN103884367A (en) * | 2014-02-14 | 2014-06-25 | 宜兴市三维电气制造有限公司 | Discrete center hanging dead weight type loading device |
| CN103884367B (en) * | 2014-02-14 | 2016-08-17 | 宜兴市三维电气制造有限公司 | Discrete center hanging dead weight type safe charger |
| CN106353671A (en) * | 2015-07-17 | 2017-01-25 | 苏州杰锐思自动化设备有限公司 | Knocking head for knocking test and knocking test device |
| CN106679786A (en) * | 2016-12-22 | 2017-05-17 | 湖北省计量测试技术研究院 | Verification device of static weight and superposition composite hook scale |
| CN106644260A (en) * | 2017-01-25 | 2017-05-10 | 福建省计量科学研究院 | 2MN dead load overlapping composite-type force standard machine |
| CN106644260B (en) * | 2017-01-25 | 2023-07-25 | 福建省计量科学研究院 | 2MN dead weight superposition composite force standard machine |
| CN108896398A (en) * | 2018-08-31 | 2018-11-27 | 中国航天空气动力技术研究院 | A kind of dynamic calibration equipment generating negative step load |
| CN108896398B (en) * | 2018-08-31 | 2021-03-26 | 中国航天空气动力技术研究院 | Dynamic calibration equipment for generating negative step load |
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