CN109520653A - The uniaxial radial load cell of axial pin type - Google Patents
The uniaxial radial load cell of axial pin type Download PDFInfo
- Publication number
- CN109520653A CN109520653A CN201910023043.4A CN201910023043A CN109520653A CN 109520653 A CN109520653 A CN 109520653A CN 201910023043 A CN201910023043 A CN 201910023043A CN 109520653 A CN109520653 A CN 109520653A
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- CN
- China
- Prior art keywords
- elastic element
- load cell
- radial load
- pin type
- uniaxial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
The invention discloses the uniaxial radial load cells of axial pin type, including pivot elements, elastic element, foil gauge group, seal cover board, rubber seal.Each built-in elastic element in every pivot pin both ends, every elastic element is as required in four foil gauges of surface mount.When pivot pin bears radial force, the strain signal that foil gauge generates is exported in electrical signal form by auxiliary circuit, and the radial force of pivot pin can be solved by electric signal.The present invention solves the problems, such as that existing shaft pin sensor must slot on surface or internal openings improve measured zone stress, using novel embedded elastomer as Amplification structure, improve the structural strength and signal sensitivity of shaft pin sensor, the stickup difficulty for reducing foil gauge, improves measurement accuracy and product interchangeability.
Description
Technical field
The present invention relates to a kind of uniaxial radial load cells of axial pin type, relate in particular to a kind of novel axial pin type
Radial load cell is mainly used in the detection of the uniaxially radial pressure of pivot pin.
Background technique
Common axial pin type single shaft force snesor both at home and abroad at present, divides according to dynamometry principle are as follows: shear stress type and curved
Bent direct stress type, such as CN105588669A, CN103063345 B, CN106347418B pivot pin patent, the measurement of radial force
Method is required to open-blind hole or surface in pivot pin and opens stress collection bracket groove, it is therefore an objective to the stress of force part is improved, to guarantee
The sensitivity and precision of stress measurement, mentality of designing are the design philosophys according to conventional pivot pin weighing sensor, certainly with pivot pin
Elastomer of the body as detection causes overload capacity poor, while in size directly the disadvantage is that weakening the intensity of pivot pin itself
Open-blind hole and stickup foil gauge operation difficulty are big inside lesser pivot pin.The scheme of foil gauge is pasted again in surface stress groove
It will lead to foil gauge protective performance difference or lack installation space；Secondly, conventional shaft pin sensor generallys use sensor special-purpose steel,
Such as 40CrNiMoA steel, cause material bodies cost and processing cost to be significantly increased, and to many high load pivot pin operating conditions, it is right
Wear-resisting property, rigidity, contact position etc. all there are certain requirements, and existing shaft pin sensor is difficult to meet demand.
Therefore, it is necessary to develop a kind of simple and convenient, the higher shaft pin sensor of measuring accuracy of installation.
Summary of the invention
For the above prior art problem, the present invention provides a kind of uniaxial radial load cells of axial pin type, have inspection
The function of surveying pivot pin radial force, solves the defects of existing axial pin type force snesor intensity is low, manufacture difficulty is big.
Technical solution of the present invention is specific as follows:
The uniaxial radial load cell of axial pin type, comprising:
Pin element is used as load bearing component；
Elastic element, the symmetrical both ends for being mounted on the pin element of two elastic elements, the elastic element are equipped with
Strain regions；
Foil gauge group is made of multiple foil gauges, each foil gauge is arranged in the strain regions；
Seal cover board, two seal cover boards are fastened on the pivot elements both ends, play sealing and cross line；
Wherein, the elastic element is single parallel girder construction, and the single parallel girder construction includes parallel girder and parallel girder
The cylindrical location structure that both ends are equipped with.
Further, between the upper and lower surfaces in the parallel girder have a gap, the gap be elastic element positioning,
Installation, line excessively play booster action；Two mutual corresponding through-holes I are respectively provided on upper and lower surfaces in parallel girder.
Further, a foil gauge is pasted in four through-holes I in parallel girder.
Further, the strain gauge adhesion position is to paste direction on the longitudinal center line of the upper and lower surfaces in parallel girder
For the axial direction for being parallel to elastic element；Foil gauge surface covers sealant layer.
Further, four foil gauges pasted on parallel girder form a favour stone full-bridge, the upper and lower surfaces in parallel girder
On two uniaxial strain pieces as diagonal bridge arm, one radial force of a favour stone full bridge measurement.
Further, the elastic element is axially provided with through-hole II, which is the positioning of elastic element, installation, crosses line
Play booster action.
Further, the both ends of the pivot elements are respectively provided with cylindrical blind hole, and the center of the pivot elements is equipped with logical
Hole III.
Further, the elastic element is fixed on the pivot elements both ends by the cylindrical location structure at its both ends
In blind hole, the diameter of cylindrical location structure is identical as diameter of blind hole, the bottom end face of blind hole and the circle of elastic element side
The end face of cylindricality location structure fits closely.
Further, the seal cover board by multiple bolt fastenings at pivot elements both ends, on the seal cover board
Circular trough is embedded in rubber seal, to increase sealing effect.
Beneficial effect is the present invention compared with prior art:
(1) pivot elements surface does not need to carry out additional machining, has good interchangeability with former solid pivot pin；
(2) pivot elements structural strength is big, overload capacity is strong, strong environmental adaptability；
(3) range of choice of elastic element material is big, and elastic element manufacture craft difficulty and strain gauge adhesion difficulty reduce；
(4) transducer sensitivity is high, and sensitivity design freedom degree is big.
Detailed description of the invention
Fig. 1 is a kind of axial pin type sensor structure axial direction explosive view of the present invention；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the face the B-B cross-sectional view of Fig. 2；
Fig. 4 is the side view of pivot elements；
Fig. 5 is the face the A-A cross-sectional view of Fig. 4；
Fig. 6 is the seal cover board side view with aperture；
Fig. 7 is the face the C-C cross-sectional view of Fig. 6；
Fig. 8 is the elastic element structure schematic diagram of Fig. 1；
Fig. 9 is a kind of strain gauge bridge circuit connection schematic diagram of Fig. 8；
Figure 10 is the strain gauge adhesion position view in parallel girder construction.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.Under
Face is described in detail the embodiment of the present invention in conjunction with attached drawing.
As shown in Figure 1, Figure 2, Figure 3 shows, the uniaxial radial load cell of axial pin type, including pin element 1, elastic element 2, answer
Become piece group and seal cover board 3；Pin element 1 is used as load bearing component；Two elastic elements 2 it is symmetrical be mounted on pin element 1
Both ends, elastic element 2 be equipped with strain regions；Foil gauge group is made of multiple foil gauges, each foil gauge, which is arranged at, answers
Become in area；Two seal cover boards 3 are fastened on 1 both ends of pivot elements, play sealing and cross line.
A preferred embodiment of the above-described embodiment about pivot elements is given below:
As shown in Figure 4, Figure 5, pivot elements 1 are the carrier of shaft pin sensor, are main load bearing components, by radial load
Radial displacement deformation is generated afterwards, and material uses alloy steel making, such as 40Cr, 45 steel, numerical control machine-shaping.Elastomer both ends respectively have
Four threaded holes 4, by bolt come fixing seal cover board 3.The both ends of pivot elements 1 are respectively provided with cylindrical blind hole 5, pivot pin member
The center of part 1 is equipped with through-hole III 6, for assisting installation and crossing line, can not have to brill center if the length of pivot elements 1 is long
Through-hole, then crossing the aperture end cap that line then all passes through both ends.
A preferred embodiment of the above-described embodiment about seal cover board is given below:
As shown in Figure 6, Figure 7, there are four bolts hole 8 on seal cover board 3 rises by four bolt fastenings at 1 both ends of pivot elements
To the effect of protection and sealing to internal elastomeric, sealing effect is reinforced by rubber seal 7, the end of threaded hole is opened at center
Lid is used for the extraction of conducting wire；Seal cover board 3 is Q235 material.
A preferred embodiment of the above-described embodiment about elastic element is given below:
As shown in figure 8, elastic element 2 is shaft pin sensor core part, for integrated molding structure, material is than pivot elements
1 performance more preferably steel alloy, such as 40CrNiMoA steel, structure type are single parallel girder construction；The two of single parallel girder construction
End is equipped with cylindrical location structure 11；There is a gap, which is elastic element between upper and lower surfaces in parallel girder 12
Positioning, installation, cross line and play booster action, while the size in gap influences very little to structural behaviour；In parallel girder 12 it is upper,
Two mutual corresponding through-holes I 9 are respectively provided on lower surface.
Elastic element 2 is axial to be provided with through-hole II 10, the through-hole II 10 be the positioning of elastic element, installation, cross line play it is auxiliary
Effect is helped, while the size of axial through-hole II 10 influences very little to structural behaviour, but takes as far as possible in the case where meet demand
Small value.
Elastic element 2 is fixed in the blind hole 5 at 1 both ends of pivot elements by the cylindrical location structure 11 at its both ends, circle
The diameter of cylindricality location structure 11 is identical as the diameter of blind hole 5, the bottom end face of blind hole 5 and the cylinder of 2 side of elastic element
The end face of location structure 11 fits closely, and it is component, resultant force, side that two elastic elements 2, which are the advantages of being symmetrically installed, be symmetrically installed,
It is calculated to angular dimensions more convenient.
As shown in Figure 9, Figure 10, a foil gauge is pasted in four through-holes I 9 in parallel girder 12.Strain gauge adhesion
Position is on the longitudinal center line of the upper and lower surfaces in parallel girder 12, and pasting direction is the axial direction for being parallel to elastic element 2；It answers
Become piece surface and covers sealant layer.
Four foil gauges pasting on parallel girder 12 form a favour stone full-bridge, on the upper and lower surfaces in parallel girder 12
Two foil gauges as diagonal bridge arm, one radial force of a favour stone full bridge measurement.
The working principle of the invention:
The purpose of the present invention is the sizes of single shaft radial shear suffered by detection pivot pin, while resist torque load and temperature being needed to become
The interference of change.
After shaft pin sensor shaft end is by load, pivot pin generates local deformation, which includes shearing and moment of flexure two
Part, while elastic element also generates flexible deformation, deformation carries out Amplification by parallel girder construction, can in conjunction with detection circuit
To isolate radial shear suffered by pivot pin without the influence of bending moment.
The full-bridge shape of four foil gauge 1A, foil gauge 1B, foil gauge 1C, foil gauge 1D composition on elastic element parallel girder
The advantages of formula, full-bridge is the influence that can resist temperature change, and wherein foil gauge 1A, foil gauge 1B form adjacent bridge arm, strain
Piece 1C, foil gauge 1D form an other adjacent bridge arm, each one radial force of favour stone full bridge measurement.
It can to sum up obtain, the present invention solves existing shaft pin sensor and must survey in surface fluting or internal openings to improve
The problem of amount regional stress improves the structure of shaft pin sensor using novel embedded elastomer as Amplification structure
Intensity and signal sensitivity reduce the stickup difficulty of foil gauge, improve measurement accuracy and product interchangeability.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (9)
1. the uniaxial radial load cell of axial pin type characterized by comprising
Pin element is used as load bearing component；
Elastic element, the symmetrical both ends for being mounted on the pin element of two elastic elements, the elastic element are equipped with
Strain regions；
Foil gauge group is made of multiple foil gauges, each foil gauge is arranged in the strain regions；
Seal cover board, two seal cover boards are fastened on the pivot elements both ends, play sealing and cross line；
Wherein, the elastic element is single parallel girder construction, and the single parallel girder construction includes parallel girder and parallel girder
The cylindrical location structure that both ends are equipped with.
2. the uniaxial radial load cell of axial pin type according to claim 1, it is characterised in that: in the parallel girder
There is a gap, which is that booster action is played in the positioning, installation, line excessively of elastic element between upper and lower surfaces；
Two mutual corresponding through-holes I are respectively provided on upper and lower surfaces in parallel girder.
3. the uniaxial radial load cell of axial pin type according to claim 2, it is characterised in that: four in parallel girder are logical
A foil gauge is pasted in hole I.
4. the uniaxial radial load cell of axial pin type according to claim 3, it is characterised in that: the strain gauge adhesion position
It is set on the longitudinal center line of the upper and lower surfaces in parallel girder, pasting direction is the axial direction for being parallel to elastic element；Foil gauge table
Face covers sealant layer.
5. the uniaxial radial load cell of axial pin type according to claim 3, it is characterised in that: four pasted on parallel girder
A foil gauge forms a favour stone full-bridge, two uniaxial strain pieces on upper and lower surfaces in parallel girder as diagonal bridge arm,
One favour stone full bridge measurement, one radial force.
6. the uniaxial radial load cell of axial pin type according to claim 1, it is characterised in that: the elastic element is axial
It is provided with through-hole II, which is that booster action is played in the positioning, installation, line excessively of elastic element.
7. the uniaxial radial load cell of axial pin type according to claim 1, it is characterised in that: the two of the pivot elements
End is respectively provided with cylindrical blind hole, and the center of the pivot elements is equipped with through-hole III.
8. the uniaxial radial load cell of axial pin type according to claim 2, it is characterised in that: the elastic element passes through
The cylindrical location structure at its both ends is fixed in the blind hole at the pivot elements both ends, the diameter of cylindrical location structure with it is blind
The diameter in hole is identical, and the end face of the cylindrical location structure of the bottom end face and elastic element side of blind hole fits closely.
9. the uniaxial radial load cell of axial pin type according to claim 1, it is characterised in that: the seal cover board passes through
Multiple bolt fastenings are at pivot elements both ends, and the circular trough on the seal cover board is embedded in rubber seal, to increase
Sealing effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910023043.4A CN109520653A (en) | 2019-01-10 | 2019-01-10 | The uniaxial radial load cell of axial pin type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910023043.4A CN109520653A (en) | 2019-01-10 | 2019-01-10 | The uniaxial radial load cell of axial pin type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109520653A true CN109520653A (en) | 2019-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910023043.4A Pending CN109520653A (en) | 2019-01-10 | 2019-01-10 | The uniaxial radial load cell of axial pin type |
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| Country | Link |
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| CN (1) | CN109520653A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504521A (en) * | 2020-11-09 | 2021-03-16 | 江门市英合创展电子有限公司 | Pin type force sensor |
| CN113091967A (en) * | 2021-03-26 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Shaft pin type triaxial force cell sensor |
| CN114754907A (en) * | 2022-03-21 | 2022-07-15 | 松诺盟科技有限公司 | Axle pin force sensor |
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|---|---|---|---|---|
| GB1577341A (en) * | 1978-02-20 | 1980-10-22 | British Hovercraft Corp Ltd | Shear pin load cell load measuring equipment |
| EP0154728A1 (en) * | 1984-03-13 | 1985-09-18 | Yotaro Hatamura | Load detector |
| CN102221431A (en) * | 2011-03-10 | 2011-10-19 | 西北工业大学 | Optical fiber Bragg grating type stick force sensor |
| CN102435359A (en) * | 2010-09-29 | 2012-05-02 | 中国海洋石油总公司 | Tension converter of tensioner |
| CN104903691A (en) * | 2012-11-12 | 2015-09-09 | 株式会社爱安德 | Roberval-type load cell |
| CN105588669A (en) * | 2015-12-11 | 2016-05-18 | 广西柳工机械股份有限公司 | Shaft pin-type three-way force-measuring sensor |
| CN205981523U (en) * | 2016-08-23 | 2017-02-22 | 泰科思（深圳）传感器有限公司 | Answer variant tension sensor |
| CN209214817U (en) * | 2019-01-10 | 2019-08-06 | 徐州徐工挖掘机械有限公司 | A kind of uniaxial radial load cell of axial pin type |
-
2019
- 2019-01-10 CN CN201910023043.4A patent/CN109520653A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1577341A (en) * | 1978-02-20 | 1980-10-22 | British Hovercraft Corp Ltd | Shear pin load cell load measuring equipment |
| EP0154728A1 (en) * | 1984-03-13 | 1985-09-18 | Yotaro Hatamura | Load detector |
| CN102435359A (en) * | 2010-09-29 | 2012-05-02 | 中国海洋石油总公司 | Tension converter of tensioner |
| CN102221431A (en) * | 2011-03-10 | 2011-10-19 | 西北工业大学 | Optical fiber Bragg grating type stick force sensor |
| CN104903691A (en) * | 2012-11-12 | 2015-09-09 | 株式会社爱安德 | Roberval-type load cell |
| CN105588669A (en) * | 2015-12-11 | 2016-05-18 | 广西柳工机械股份有限公司 | Shaft pin-type three-way force-measuring sensor |
| CN205981523U (en) * | 2016-08-23 | 2017-02-22 | 泰科思（深圳）传感器有限公司 | Answer variant tension sensor |
| CN209214817U (en) * | 2019-01-10 | 2019-08-06 | 徐州徐工挖掘机械有限公司 | A kind of uniaxial radial load cell of axial pin type |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504521A (en) * | 2020-11-09 | 2021-03-16 | 江门市英合创展电子有限公司 | Pin type force sensor |
| CN113091967A (en) * | 2021-03-26 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Shaft pin type triaxial force cell sensor |
| CN113091967B (en) * | 2021-03-26 | 2023-08-22 | 徐州徐工挖掘机械有限公司 | Shaft pin type triaxial force transducer |
| CN114754907A (en) * | 2022-03-21 | 2022-07-15 | 松诺盟科技有限公司 | Axle pin force sensor |
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Application publication date: 20190326 |