CN202547835U - Pure torque reference device - Google Patents
Pure torque reference device Download PDFInfo
- Publication number
- CN202547835U CN202547835U CN2012202287568U CN201220228756U CN202547835U CN 202547835 U CN202547835 U CN 202547835U CN 2012202287568 U CN2012202287568 U CN 2012202287568U CN 201220228756 U CN201220228756 U CN 201220228756U CN 202547835 U CN202547835 U CN 202547835U
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- force
- knife
- edge
- stay cord
- lever arm
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Abstract
The utility model discloses a pure torque reference device. The pure torque reference device comprises a lever force arm, a knife bearing, a knife edge, a tension transmission device, a screw rod and a force applying device which is used for pulling the tension transmission device, wherein a V-shaped groove is formed at the top of the knife bearing; the lever force arm is pressed on the back face of the knife edge; a cutting edge of the knife edge is pressed in the V-shaped groove of the knife bearing; the screw rod is positioned right above the lever force arm and parallel to the lever force arm; the force applying device is sleeved on the screw rod and can move in an axial direction of the screw rod; the force applying device is positioned right above the knife edge; a vertical through hole is formed in the lever force arm right against the knife edge; and the force applying device is connected with the knife edge by the tension transmission device. Through the adoption of the force applying device and the tension transmission device, additional load balance is increased to form a force couple so as to achieve a pure torque device, so that purposes of improving device accuracy and increasing measuring range are achieved; meanwhile, relative accuracy in measurement is improved under the circumstance that invariable absolute accuracy is guaranteed.
Description
Technical field
The utility model relates to a kind of measuring and testing device, relates in particular to a kind of pure torsion standard apparatus.
Background technology
Moment of torsion is a derived quantity; Application torque metering belongs to the category of mechanics metering, and its groundwork is unified moment of torsion system of units, sets up the primary standards of measurement and the standard of measurement of reproduction moment of torsion value; Confirm magnitude transferring method and transmission procedure; And supervise the implementation of, the working measuring instrument that simultaneously the accurate transmission of quantity value of primary standards of measurement and standard of measurement is used to every profession and trade is to guarantee measurement result accurately and reliably.Application torque metering finally will implement on the concrete application torque metering utensil, therefore, sets up perfect application torque metering utensil verification system, just becomes the emphasis of various countries' application torque metering, the basis that to set up accurate pure torsion standard apparatus then be whole application torque metering work.
The pure torsion standard apparatus mostly is a lever counterweight formula loading principle both at home and abroad, and promptly on the lever of certain brachium, the counterweight of carrying additionally some forms the standard torque value, thereby realizes transmission, calibration and the detection of moment of torsion value.Generally they all have two cover counterweight chargers, load to realize both direction.Different according to torque direction, select one of them loading for use.Though whole principle is very simple, the uncertainty that various influence factors are brought is much very complicated.
The factor that influences pure torsion standard apparatus uncertainty mainly by uncertainty, the uncertainty of counterweight loading force value, the uncertainty of block bearing friction torque, the right alignment of leverage arm of force length change the uncertainty that the uncertainty that causes, stress on the bearing edge bring, the uncertainty that arm of force levelness causes is formed.How to guarantee that the work of pure torsion standard apparatus meets the moment of torsion mechanical model, reduce each uncertainty component, guarantee that the uncertainty index of whole device becomes the key content of this Project Study.
It is the mode that present pure torsion standard apparatus generally adopts that the monolateral moment of torsion that applies counterweight applies mode, is not that pure torsion applies mode but this moment of torsion applies mode.
The utility model content
To the above-mentioned weak point that exists in the prior art, the utility model provides a kind of raising accuracy, increases range, under guaranteeing the constant situation of absolute precision, promotes the pure torsion standard apparatus of relative accuracy in measuring.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
The pure torsion standard apparatus comprises that lever arm of force, cutter hold, the edge of a knife, pulling force transfer device, screw mandrel and be used to spur the force application apparatus of pulling force transfer device; The top that said cutter holds is provided with V-shaped groove, and said lever arm of force is pressed on the back side of the edge of a knife, and the blade of the edge of a knife is pressed in the V-shaped groove that cutter holds; Said screw mandrel be positioned at lever arm of force directly over and parallel with lever arm of force; Said force application apparatus is enclosed within on the screw mandrel and can moving axially along screw mandrel; Force application apparatus be positioned at the edge of a knife directly over; On the said lever arm of force and over against the edge of a knife vertical through hole is set, said force application apparatus is connected with the edge of a knife through the pulling force transfer device.
As a kind of preferred version of the utility model, said force application apparatus comprises motor and motor-driven pulley.
As the another kind of preferred version of the utility model, said pulling force transfer device is stay cord or steel band; Said stay cord or steel band pass vertical through hole, and an end of stay cord or steel band is fixed on the force application apparatus, and the other end of stay cord or steel band is fixed on the edge of a knife.
As another preferred version of the utility model, the top of the said edge of a knife vertically is provided with shrinkage pool, and the other end of said stay cord or steel band is fixed in the shrinkage pool.
Compared with prior art, the pure torsion standard apparatus of the utility model has following advantage:
1, increases extra load balance through force application apparatus and pulling force transfer device and form couple, realize the pure torsion device, reach and improve the device accuracy, increase the purpose of range; Guaranteeing to have promoted the relative accuracy in measuring under the constant situation of absolute precision simultaneously.
2, this pure torsion standard apparatus makes object not present any translation motion fully, only presents pure rotational motion, and it will become the emphasis of pure torsion standard apparatus research and further reduce the breach of uncertainty.Simultaneously, adopt the couple mode to apply the additional friction moment of torsion that moment of torsion also will reduce the difficult evaluation that brings because of the use block bearing, reduce the accuracy that this additional friction moment of torsion will improve the pure torsion standard apparatus greatly, reduce uncertainty.
3, this pure torsion standard apparatus realizes that pure torsion applies mode, reduces the uncertainty component of pure torsion standard apparatus, improves its accuracy, increases stability.
4, this pure torsion standard apparatus is not introduced new moment of torsion on final application of force direction, and the absolute measurement precision is constant; There is upward component in the application of force on edge of a knife vertical direction, reduce the edge of a knife and meet with stresses, and has reduced uncertainties such as friction; The relative scope of edge of a knife load increases, and the load measure scope increases, and relative accuracy rises.
Description of drawings
Fig. 1 is the structural representation of pure torsion standard apparatus.
In the accompanying drawing: 1-lever arm of force; 2-cutter holds; 3-edge of a knife; 4-application of force counterweight; 5-V-shaped groove; 6-pulling force transfer device; 7-force application apparatus; 8-vertically through holes; 9-shrinkage pool; 10-screw mandrel.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done to describe in further detail.
As shown in Figure 1, the pure torsion standard apparatus comprises that lever arm of force 1, cutter hold 2, the edge of a knife 3, pulling force transfer device 6, screw mandrel 10 and be used to spur the force application apparatus 7 of pulling force transfer device 6, and in the present embodiment, pulling force transfer device 6 adopts stay cords.Cutter holds 2 top and is provided with V-shaped groove 5, and lever arm of force 1 is pressed on the back side of the edge of a knife 3, and the blade of the edge of a knife 3 is pressed in cutter and holds in 2 the V-shaped groove 5.Screw mandrel 10 be positioned at lever arm of force 1 directly over and parallel with lever arm of force 1; Force application apparatus 7 is enclosed within on the screw mandrel 10 and can moving axially along screw mandrel 10; Force application apparatus 7 be positioned at the edge of a knife 3 directly over, on the lever arm of force 1 and over against the edge of a knife 3 vertical through hole 8 is set, stay cord passes vertical through hole 8; The top of stay cord is fixed on the force application apparatus 7, and the bottom of stay cord is fixed on the edge of a knife 3 tops.
In the present embodiment, force application apparatus 7 comprises motor and motor-driven pulley, also can adopt other mechanisms such as windlass certainly, as long as can apply the purpose that can reach the utility model once pulling force straight up to the edge of a knife 3.Make tension cross the edge of a knife through force application apparatus in the screw mandrel adjusted, the moment of torsion that makes its generation is zero, does not influence torque.Pulling force transfer device 6 is not limited to stay cord, also can adopt pulling force transferring structures such as steel band.
The top of the edge of a knife 3 vertically is provided with shrinkage pool 9, and the bottom of stay cord is fixed in the shrinkage pool 9.2 contact point is held near the edge of a knife 3 and cutter more in the bottom of stay cord, and when applying moment of torsion, stay cord applies the arm of force upwards and is approximately zero.
When using this pure torsion standard apparatus to apply moment of torsion; Application of force counterweight 4 is applied to the right part (as shown in Figure 1) of lever arm of force 1; For the pure torsion standard apparatus; Adopting the mode that applies of this moment of torsion of couple is the mode that meets the moment of torsion mechanical model most, and this will reduce because monolaterally apply the unpredictable uncertainty component that counterweight brings greatly.If adopt couple to apply mode, adopt special connection between the arm of force and the central rotating shaft simultaneously, will reduce uncertainty component because of adopting block bearing additional friction moment of torsion to bring.Through force application apparatus 7 and stay cord straight up the point of application of power be placed on edge of a knife top, be equivalent to like this apply power upwards and the special circumstances of the arm of force when being approximately zero at the other end that standard torque applies end.But this device has carried out load balance; Promptly can guarantee that the application of force can produce an absolute pure torsion through the direction that leading screw is regulated the application of force, the variation that application of force size can't produce moment of torsion on the application of force direction of place during promptly absolute pure torsion, so just successful assurance the accuracy of measurement torque; Simultaneously because the edge of a knife existence of application of force component straight up; Make knife-edge part friction uncertainty reduce, range ability enlarges markedly, and precision rises significantly.
The utility model applies mode through adopting couple; Between the arm of force and central rotating shaft, will adopt special connection, constitute load balance system, eliminate uncertainty component because of adopting block bearing additional friction moment of torsion to bring; Simultaneously through guaranty being received significantly reducing of stress; Guaranteed measuring under the constant situation of absolute precision, measurement range increase substantially the algnment accuracy of relative raising moment of torsion.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (4)
1. the pure torsion standard apparatus comprises that lever arm of force (1), cutter hold (2) and the edge of a knife (3); The top that said cutter holds (2) is provided with V-shaped groove (5), and said lever arm of force (1) is pressed on the back side of the edge of a knife (3), and the blade of the edge of a knife (3) is pressed in cutter and holds in the V-shaped groove (5) of (2); It is characterized in that: also comprise pulling force transfer device (6), screw mandrel (10) and be used to spur the force application apparatus (7) of pulling force transfer device (6); Said screw mandrel (10) be positioned at lever arm of force (1) directly over and parallel with lever arm of force (1); Said force application apparatus (7) is enclosed within that screw mandrel (10) is gone up and can moving axially along screw mandrel (10); Force application apparatus (7) be positioned at the edge of a knife (3) directly over; Said lever arm of force (1) is gone up and over against the edge of a knife (3) vertical through hole (8) is set, and said force application apparatus (7) is connected with the edge of a knife (3) through pulling force transfer device (6).
2. pure torsion standard apparatus according to claim 1 is characterized in that: said force application apparatus (7) comprises motor and motor-driven pulley.
3. pure torsion standard apparatus according to claim 1 and 2 is characterized in that: said pulling force transfer device (6) is stay cord or steel band; Said stay cord or steel band pass vertical through hole (8), and an end of stay cord or steel band is fixed on the force application apparatus (7), and the other end of stay cord or steel band is fixed on the edge of a knife (3).
4. pure torsion standard apparatus according to claim 3 is characterized in that: the top of the said edge of a knife (3) vertically is provided with shrinkage pool (9), and the other end of said stay cord or steel band is fixed in the shrinkage pool (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202287568U CN202547835U (en) | 2012-05-21 | 2012-05-21 | Pure torque reference device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202287568U CN202547835U (en) | 2012-05-21 | 2012-05-21 | Pure torque reference device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202547835U true CN202547835U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202287568U Expired - Fee Related CN202547835U (en) | 2012-05-21 | 2012-05-21 | Pure torque reference device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202547835U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180992A (en) * | 2014-09-18 | 2014-12-03 | 天津电气科学研究院有限公司 | Measuring method for vertical type hydrostatic bearing sensitivity |
| CN106248274A (en) * | 2016-10-11 | 2016-12-21 | 沈阳航天新光集团有限公司 | A kind of special moment of torsion detection tool device |
-
2012
- 2012-05-21 CN CN2012202287568U patent/CN202547835U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180992A (en) * | 2014-09-18 | 2014-12-03 | 天津电气科学研究院有限公司 | Measuring method for vertical type hydrostatic bearing sensitivity |
| CN104180992B (en) * | 2014-09-18 | 2016-08-24 | 天津电气科学研究院有限公司 | A kind of measuring method of vertical hydrostatic bearing sensitivity |
| CN106248274A (en) * | 2016-10-11 | 2016-12-21 | 沈阳航天新光集团有限公司 | A kind of special moment of torsion detection tool device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20150521 |
|
| EXPY | Termination of patent right or utility model |