CN203396526U - High-precision torque wrench - Google Patents

High-precision torque wrench Download PDF

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Publication number
CN203396526U
CN203396526U CN201320449180.2U CN201320449180U CN203396526U CN 203396526 U CN203396526 U CN 203396526U CN 201320449180 U CN201320449180 U CN 201320449180U CN 203396526 U CN203396526 U CN 203396526U
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CN
China
Prior art keywords
web joint
elastic body
group
high precision
stressed plate
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Expired - Fee Related
Application number
CN201320449180.2U
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Chinese (zh)
Inventor
孟峰
张智敏
张跃
蔡常青
张伟
王肖磊
张殿龙
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National Institute of Metrology
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National Institute of Metrology
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Priority to CN201320449180.2U priority Critical patent/CN203396526U/en
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Publication of CN203396526U publication Critical patent/CN203396526U/en
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Abstract

The utility model discloses a high-precision torque wrench, comprising a sense component, a moment arm and a display component. The sensor component is connected with the moment arm. The display component is connected with the sense component via a signal line, so as to display the output. The sense component comprises a forced plate, an elastomer, a group of connection boards, a square drive and a group of strain gages. The group of the connection boards comprises a front connection board and a rear connection board. The forced plate and the elastomer are fixedly arranged between the front connection board and the rear connection board, forming a fixed body. The square drive is disposed on a lower end face of the sense component. The group of the strain gages are arranged on the sense component. One end of the moment arm is fixed to the other side of the rear connection board, for the purpose of applying a force. The display component is electrically connected with the group of the strain gages. By means of the high-precision torque wrench of the utility model, the measured torque value is not affected by the position where the force is applied, so that the scientific and reliable calibration means are provided for test and calibration of torque wrench calibrators.

Description

A kind of high precision torque spanner
Technical field
The utility model relates to a kind of high precision high accuracy torque spanner, can be used for bolt tightening, bolt tightening detection, torsion-testing and detecting device for determining torque of spanner testing calibration.
Background technology
Torque spanner claims again dial torque wrench, a kind of instrument that is mainly used in bolt tightening, called after dial torque wrench in GB, called after torque spanner in vertification regulation series, the instrument that torque spanner is examined and determine is called detecting device for determining torque of spanner, in present specification, continue to use customary nomenclature in rules, that is: torque spanner and detecting device for determining torque of spanner.For bolt tightening moment of torsion, more and more pay attention to both at home and abroad at present, the application demand of high-precision torque spanner is more and more urgent, and the torque spanner that external manufacturer production high precision torque spanner can reach 1%, use as standard has reached 0.1% precision especially.Domestic torque spanner is difficult to reach 1% precision, and very large at change force application location time error, and while changing stress point position, numerical value will have larger variation.Can only, in the groove place of spanner mark application of force guarantee 1% precision, as adjusted a little position, cannot reach 1% precision.
In addition, up-to-date revision also will be promulgated and carry out national detecting device for determining torque of spanner vertification regulation, require the accuracy class of standard torque spanner to reach 0.3% and 0.1% two-stage, and while examining and determine in the stressed position of change, still can reach above-mentioned two-stage accuracy class, and current domestic this rules required standard torque spanner that also do not reach.
Utility model content
The utility model utilizes strain measurement technique, in conjunction with force structure, design, independent development a kind of high precision torque spanner, be characterized in scientific and reasonable for structure, accuracy class is high, can reach 0.1% precision, 1% precision than existing techniques in realizing improves an order of magnitude, and the error of indication and repeatability are all better than 0.1% under different force application locations.The torque spanner range ability of the utility model series can, from 0.1Nm-5000Nm, can meet up-to-date revision and will promulgate the national detecting device for determining torque of spanner vertification regulation of execution.In addition, torque spanner of the present utility model is portable and smart, be easy to carry, and can be widely used in that all kinds of bolt tightenings are controlled and assembly quality of bolt detects, as standard device, use and can also detect for torque spanner calibrating installation.
A torque spanner, comprises sensing element, the arm of force and display unit, and described sensing element is connected with the described arm of force, and described display unit is connected with described sensing element by signal wire, completes and shows output;
Described sensing element comprises stressed plate 4, elastic body 7, one group of web joint, square tenon 5 and one group of foil gauge 6;
Described one group of web joint comprises front web joint 3 and rear web joint 8; Described stressed plate 4 and elastic body 7 are fixedly installed between described front web joint 3 and rear web joint 8, form a fixed body; Described side's tenon 5 is arranged on the lower surface of described sensing element; Described output side tenon 5 is positioned at the bottom surface of described stressed plate 4; Described foil gauge 6 is positioned on two sidewalls of described elastic body 7.The bottom of described stressed plate 4 arranges square opening, and described side's tenon 5 embeds in this square opening by magnet, and the axis centre line of described square opening overlaps with the axis centre line of described side's tenon 5.
Described rear web joint 8 is connected with the arm of force; Can on rear web joint 8, leave threaded hole and the arm of force is bolted, also can on rear web joint 8, process other suitable modes and make 8 to be connected with the arm of force.
Described in one group, foil gauge 6 is arranged on sensing element; Described in one group, foil gauge 6 is arranged on the surface, two side of described elastic body 7, and fixing upper and lower two foil gauges 6 of each side, and four foil gauges of both sides are respectively ε 1, ε 2, ε 3, ε 4;
Described four foil gauges form full electric bridge, and the fixed position of described foil gauge 6 equates the distance of each foil gauge 6 along the axis centre line parallel of vertical direction center line and square tenon 5 and each center line to described front web joint 3.
Described arm of force one end is fixed on the opposite side of described rear web joint 8, applies acting force; Described display unit is electrically connected to one group of described foil gauge 6.Show and be applied to the torque value on bolt, foil gauge is connected with outside Displaying Meter by adapter after forming full-bridge.
In concrete scheme, described elastic body 7 is fixed on the top of described stressed plate 4; Between described stressed plate 4 and elastic body 7 and described front web joint 3 and rear web joint 8 for integral type structure or be connected by link; Described link comprises one group of set bolt; Be used for described stressed plate 4, elastic body 7 is fixed in the middle of described front web joint 3 and rear web joint 8; Stressed plate 4 just one end is fixed, and does not contact with elastic body, and moment of torsion is transmitted on elastic body 7 by web joint 3.
In concrete enforcement, described link is the first erection bolt 1, the second erection bolt 2, the 3rd erection bolt 9; Described the first erection bolt 1 is fixedly connected with described front web joint 3 with described elastic body 7; Described the second erection bolt 2 is fixedly connected with described front web joint 3 with described stressed plate 4; Described the 3rd erection bolt 9 is fixedly connected with described rear web joint 8 with described elastic body 7.
Can comprise following several situation:
Described front web joint 3 is integral type structure with described elastic body 7, between described front web joint 3 and described stressed plate 4, by the second erection bolt 2, is fixedly connected with, and between described rear web joint 8 and described elastic body 7, by the 3rd erection bolt 9, is fixedly connected with;
Or described front web joint 3 is integral type structure with described stressed plate 4, between described front web joint 3 and described elastic body 7, by the first erection bolt 1, be fixedly connected with, between described rear web joint 8 and described elastic body 7, by the 3rd erection bolt 9, be fixedly connected with;
Or described elastic body 7 is integral type structure with described rear web joint 8, between described front web joint 3 and described elastic body 7, by the first erection bolt 1, be fixedly connected with, between described front web joint 3 and described stressed plate 4, by the second erection bolt 2, be fixedly connected with;
Or described elastic body 7 be integral type structure with described rear web joint 8, described front web joint 3 and described stressed plate 4 are integral type structure, between described front web joint 3 and described stressed plate 4, by the second erection bolt 2, are fixedly connected with.
When described front web joint 3 and described stressed plate 4 and/or described elastic body 7 and/or described elastic body 7 are formed to integral structure with described rear web joint 8, can realize high manufacturing accuracy for mode most preferably.
If be not integral structure between described front web joint 3 and described stressed plate 4 or elastic body 7, neither integral structure between described elastic body 7 and described rear web joint 8, all by link, connect:
Described elastic body xsect is circle or rectangle etc.Before and after pasting foil gauge position, all can be circle or rectangle etc.Without specific function, the strain computational algorithm that different cross section when design produces during according to different its same moment of torsion of mechanics formula is different.
The size of the length width of described elastic body 7 is adjustable, and when length width changes, corresponding area of section changes thereupon, for changing the range ability of high precision torque spanner.Comprise
Described sensing element also comprises shell 10, and described jacket applies outside described front web joint 3, rear web joint 8 and elastic body 7.
Can utilize the utility model to carry out detecting device for determining torque of spanner verification, described detecting device for determining torque of spanner method of calibration is that described high precision torque spanner is connected with detecting device for determining torque of spanner, for the detecting device for determining torque of spanner described in assay calibration;
The square tenon 5 of described torque spanner is connected with the test side of described detecting device for determining torque of spanner; Open detecting device for determining torque of spanner, operation detecting device for determining torque of spanner retroaction shelves arm mechanism on detecting device for determining torque of spanner touches after the high precision dial torque wrench arm of force, just moment of torsion is applied on spanner, and then compares both data, the measured value of detecting device for determining torque of spanner is carried out to verification.
The utility model is applied in and carries out bolt installation, the method in addition: by the square tenon 5 of described torque spanner by fixed muffle by bolt according to the accuracy requirement connection that is tightened.Arrive stop after the mounting torque of wanting.
In addition, the utility model torque spanner for erection bolt except can installing, the more important bolt installation quality measuring method that is, according to setting and working condition requirement, detects by fixed muffle the square tenon 5 of described torque spanner to the torque value of erection bolt.
Spanner of the present utility model can be according to different ranges, the arm of force of design different length, and such as arm of force length can be from 200mm~1500mm, spanner total quality is from 1kg~10kg.
High precision torque spanner of the present utility model, has accuracy class high: relative error of indicating value and repeatability are all better than 0.1%.Most critical be the center of the Shi Fangsun all the time torque value that spanner is measured when changing point of application position, be different from other Digital-display torque spanners and will bring the defect of larger measuring error when the stressed position of change.High precision torque spanner range ability of the present utility model is wide: can be from 0.1Nm-5000Nm.Dexterous light, be easy to carry about with one.
In addition, change the elastomeric size of spanner of the present utility model and just can change spanner range ability, this structure can realize at 0.1Nm-5000Nm, preferably within the scope of 1Nm~2000Nm, reach 0.1% precision, uncertainty of measurement 0.1%(k=2), while changing stress point position, the error of indication is all better than 0.1%(k=2 with uncertainty), so can be used as the standard torque spanner of detecting device for determining torque of spanner assay calibration.
Generally speaking, the utility model is one and has high-precision torque spanner, meets the not stressed position influence of measurement torque value of new standard requirement, for detecting device for determining torque of spanner assay calibration provides science, calibrates reliably means.Can also provide scientific and effective high precision torque spanner for bolt tightening operating mode detects, and, high precision torque spanner of the present utility model is practical and convenient, for the testing calibration detecting device for determining torque of spanner of going out, all kinds of bolt tightening torsion-testing provide convenient and practical standard.
Accompanying drawing explanation
Fig. 1 is the structural representation of high precision torque spanner of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the structural representation of the sensing element of the utility model high precision torque spanner.Fig. 4 is the vertical view of Fig. 3.
Description of reference numerals:
Web joint, 9-the 3rd erection bolt, 10-shell after a-sensing element, the b-arm of force, 1-the first erection bolt, 2-the second erection bolt, the front web joint of 3-, 4-stressed plate, the 5-side of output tenon, 6-foil gauge, 7-elastic body, 8-.
Embodiment
Below in conjunction with embodiment, further illustrate the utility model.
Embodiment 1
High precision torque spanner as shown in Fig. 3~4, it comprises sensing element, the arm of force and Displaying Meter, and described sensing element is connected with the described arm of force, and described Displaying Meter is connected with described sensing element by signal wire, it is characterized in that:
Described sensing element comprises front web joint 3 and rear web joint 8, stressed plate 4, elastic body 7 side's tenons 5 and foil gauge 6;
Described stressed plate 4 and described elastic body 7 are at the homonymy of described front web joint 3, and described elastic body 7 is positioned at the top of described stressed plate 4, and in the horizontal direction of described elastic body 7 and described stressed plate 4, each plane is parallel to each other; Described rear web joint 8 is positioned at the opposite side of described elastic body 7;
Between described front web joint 3 and described stressed plate 4 and/or described elastic body 7 and/or described elastic body 7 and described rear web joint 8 for integral type structure or be connected by link;
Described rear web joint 8 is connected with the arm of force; Can on rear web joint 8, leave threaded hole and the arm of force is bolted, also can on rear web joint 8, process other suitable modes and make 8 to be connected with the arm of force.
Described output side tenon 5 is positioned at the bottom of described stressed plate 4, and described foil gauge 6 is positioned at two sidewalls of described elastic body 7.
Described front web joint 3 is that integral type structure or described front web joint 3 are that integral type structure and/or described elastic body 7 are integral type structure with described rear web joint 8 with described stressed plate 4 with described elastic body 7.The bottom of described stressed plate 4 arranges square opening, and described output side tenon 5 embeds in this square opening by magnet, and the center line of described square opening overlaps with the center line of described output side tenon 5.
Each side of two sidewalls of elastic body 7 is pasted two foil gauges 6, both sides are pasted four foil gauges 6 altogether, be respectively ε 1, ε 2, ε 3, ε 4, four foil gauges form full-bridges, the paste position of described foil gauge 6 to guarantee each foil gauge 6 along the center line of vertical direction center line and output side tenon 5 parallel and each center line to arrive the distance of described front web joint 3 equal.
Described link is the first erection bolt 1, the second erection bolt 2, the 3rd erection bolt 9;
Described the first erection bolt 1 is fixedly connected with described front web joint 3 with described elastic body 7;
Described the second erection bolt 2 is fixedly connected with described front web joint 3 with described stressed plate 4;
Described the 3rd erection bolt 9 is fixedly connected with described rear web joint 8 with described elastic body 7.
Described front web joint 3 is fixed with it in the both sides of elastic body 7 one end by two the first erection bolts 1;
Described front web joint 3 is fixed with it in the both sides of stressed plate 4 one end by two the second erection bolts 2;
Described rear web joint 8 is fixed with it in the both sides of elastic body 7 other ends by two the 3rd erection bolts 9.
Described sensing element also comprises shell 10, and it is the structure being comprised of end face and two sides, leaves threaded hole to be connected with rear web joint 8 or to be connected with elastic body 7 with front web joint 3 respectively on described Liang Ge side.
Described elastic body 7 posts the part of foil gauge 6, and its xsect is rectangle or circle etc.Without specific function, the strain computational algorithm that different cross section when design produces during according to different its same moment of torsion of mechanics formula is different.
Spanner of the present utility model can be according to different ranges, the arm of force of design different length, and such as can be from 200mm~1500mm, spanner total quality be from 1kg~10kg.
The course of work of the present utility model is:
First: while detecting device for determining torque of spanner being calibrated to detection as standard torque spanner, this high precision torque spanner is used as to common wrench and is arranged on detecting device for determining torque of spanner, according to detecting device for determining torque of spanner vertification regulation Plays torque spanner checking method, examine and determine.
Second: when carrying out bolt installation or bolt installation quality is detected as high precision torque spanner, this spanner can be connected with erection bolt by sleeve, bolt is screwed, when reaching target torque value, stop.
Technique scheme is a kind of embodiment of the present utility model, for those skilled in the art, the utility model discloses on the basis of application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned embodiment of the utility model, therefore previously described mode is just preferred, and does not have restrictive meaning.

Claims (7)

1. a high precision torque spanner, is characterized in that: comprise sensing element, the arm of force and display unit, described sensing element is connected with the described arm of force, and described display unit is connected with described sensing element by signal wire, completes and shows output;
Described sensing element comprises stressed plate (4), elastic body (7), one group of web joint, square tenon (5) and one group of foil gauge (6);
Described one group of web joint comprises front web joint (3) and rear web joint (8); Described stressed plate (4) and elastic body (7) are fixedly installed between described front web joint (3) and rear web joint (8), form a fixed body; Described side's tenon (5) is arranged on the lower surface of described sensing element; Foil gauge described in one group (6) is arranged on sensing element;
Described arm of force one end is fixed on the opposite side of described rear web joint (8), applies acting force; Described display unit is connected by joint and signal transmssion line with described one group of foil gauge (6).
2. a kind of high precision torque spanner according to claim 1, is characterized in that:
Described elastic body (7) is fixed on the top of described stressed plate (4);
Between described stressed plate (4) and elastic body (7) and described front web joint (3) and rear web joint (8) for integral type structure or be connected by link
Described output side tenon (5) is positioned at the bottom surface of described stressed plate (4); Described foil gauge (6) is positioned on two sidewalls of described elastic body (7).
3. a kind of high precision torque spanner according to claim 1 and 2, is characterized in that:
The bottom of described stressed plate (4) arranges square opening, and described side's tenon (5) embeds in this square opening by magnet, and the axis centre line of described square opening overlaps with the axis centre line of described side's tenon (5).
4. a kind of high precision torque spanner according to claim 2, is characterized in that:
Foil gauge described in one group (6) is arranged on the surface, two side of described elastic body (7), and fixing upper and lower two foil gauges (6) of each side, and four foil gauges of both sides are respectively ε 1, ε 2, ε 3, ε 4;
Described four foil gauges form full electric bridge, and the fixed position of described foil gauge (6) equates the distance of each foil gauge (6) along the axis centre line parallel of vertical direction center line and square tenon (5) and each center line to described front web joint (3).
5. a kind of high precision torque spanner according to claim 2, is characterized in that:
The xsect of described elastic body (7) is circle or rectangle.
6. according to a kind of high precision torque spanner described in claim 1,2,4 or 5, it is characterized in that:
Length, the width dimensions of described elastic body (7) are adjustable, for changing the range ability of high precision torque spanner.
7. a kind of high precision torque spanner according to claim 2, is characterized in that:
Described link comprises one group of set bolt; Be used for described stressed plate (4), elastic body (7) is fixed in the middle of described front web joint (3) and rear web joint (8);
Described sensing element also comprises shell (10), and described jacket applies outside described front web joint (3), rear web joint (8) and elastic body (7).
CN201320449180.2U 2013-07-26 2013-07-26 High-precision torque wrench Expired - Fee Related CN203396526U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320449180.2U CN203396526U (en) 2013-07-26 2013-07-26 High-precision torque wrench

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Application Number Priority Date Filing Date Title
CN201320449180.2U CN203396526U (en) 2013-07-26 2013-07-26 High-precision torque wrench

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CN203396526U true CN203396526U (en) 2014-01-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103419165A (en) * 2013-07-26 2013-12-04 中国计量科学研究院 High-precision torque wrench and checkout, installation and detection method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103419165A (en) * 2013-07-26 2013-12-04 中国计量科学研究院 High-precision torque wrench and checkout, installation and detection method thereof
CN103419165B (en) * 2013-07-26 2016-08-10 中国计量科学研究院 A kind of high accuracy torque spanner and verification, installation and detection method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140115

Termination date: 20180726