CN109520652A - Axial pin type double-shaft radial load cell - Google Patents
Axial pin type double-shaft radial load cell Download PDFInfo
- Publication number
- CN109520652A CN109520652A CN201910022791.0A CN201910022791A CN109520652A CN 109520652 A CN109520652 A CN 109520652A CN 201910022791 A CN201910022791 A CN 201910022791A CN 109520652 A CN109520652 A CN 109520652A
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- Prior art keywords
- elastic element
- type double
- radial load
- load cell
- pin type
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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 a kind of axial pin type double-shaft radial load cells, including pivot elements, elastic element, foil gauge group, seal cover board, sealing ring.Each built-in elastic element in every pivot elements both ends, each elastic element is as required in eight 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 orthogonal radial component 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 axial pin type double-shaft radial load cells, relate in particular to a kind of novel axial pin type
Radial load cell is mainly used in the detection of 2 direction radial components of pivot pin.
Background technique
Domestic and international common axial pin type force snesor at present, divides according to dynamometry principle are as follows: shear stress type and bending are just
Stress type, installation dynamometry quantity divide are as follows: single shaft, twin shaft, three axis load cells, such as CN00212676.1,
The pivot pins patent such as CN201510918130.8,201210554685.5, CN20160951278.6, the measurement method of radial force
It 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, with proof stress
The sensitivity and precision of measurement, mentality of designing is the design philosophy according to conventional pivot pin weighing sensor, with pivot pin itself work
For the elastomer of detection, direct defect is to weaken the intensity of pivot pin itself, causes overload capacity poor, while smaller in size
Pivot pin inside open-blind hole and paste foil gauge operation difficulty it is big, in surface stress groove paste foil gauge scheme can lead again
It causes foil gauge protective performance difference or lacks installation space, especially apply the pivot pin in power shovel position, radial load punching
Hit that big, operating condition is severe, existing shaft pin sensor patent formula 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 axial pin type double-shaft radial load cells, have inspection
The function of surveying 2 radial components of pivot pin, 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:
Axial pin type double-shaft radial load cell, 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 orthogonal parallel girder structure；The orthogonal parallel girder construction includes two series connection and angle phase
Poor 90 degree of parallel girder and two cylindrical location structures.
Further, there is a gap, which is determining for elastic element between the upper and lower surfaces in each parallel girder
Position, installation, line excessively play booster action；Two mutual corresponding through-holes are respectively provided on upper and lower surfaces in each parallel girder
Ⅰ。
Further, a foil gauge is pasted in four through-holes I in each 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 pasting on each parallel girder form a favour stone full-bridge, in parallel girder it is upper,
Two uniaxial strain pieces on lower surface are as diagonal bridge arm, the radial component in one direction 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 another viewing angle constructions schematic diagram of elastic element of Fig. 1；
Figure 10 is elastic element side view；
Figure 11 is the face the D-D cross-sectional view of Figure 10；
Figure 12 is a kind of strain gauge bridge circuit connection schematic diagram of Fig. 8；
Figure 13 is the strain gauge adhesion position view in first parallel girder construction；
Figure 14 is the strain gauge adhesion position view in second 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, axial pin type double-shaft radial load cell, 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 Fig. 8, Fig. 9, Figure 10, Figure 11, elastic element 2 is shaft pin sensor core part, for integrated molding structure, material
Matter is steel alloy, such as 40CrNiMoA steel more preferably than 1 performance of pivot elements, and structure type is orthogonal parallel girder structure, orthogonal
Parallel girder construction includes the parallel girder and two cylindrical location structures 11 that two series connection and angle differ 90 degree；Each is flat
There is a gap between upper and lower surfaces in cross girders, which is that booster action is played in the positioning, installation, line excessively of elastic element,
The size in gap influences very little to structural behaviour simultaneously；Be respectively provided on upper and lower surfaces in each parallel girder two mutually it is right
The through-hole I 9 answered.
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 12, Figure 13, Figure 14, it is pasted with a foil gauge in four through-holes I 9 in each parallel girder,
There are four foil gauge i.e. in parallel girder I 12, there are four foil gauges in parallel girder II 13.Strain gauge adhesion position is in parallel girder
On the longitudinal center line of upper and lower surfaces, pasting direction is the axial direction for being parallel to elastic element 2；Foil gauge surface covers sealant
Layer.
Four foil gauges pasted on parallel girder I 12 and parallel girder II 13 respectively form a favour stone full-bridge, in parallel girder
Upper and lower surfaces on two foil gauges as diagonal bridge arm, the radial component in one direction of a favour stone full bridge measurement.
Parallel girder itself is widely different in radial rigidity, ensure that good orthogonality from configuration aspects, using double flat
It ensure that the close of rigidity value on orthogonal direction after cross girders series connection, while using axial patch in foil gauge arrangement, and paste
On the longitudinal center line of upper and lower surfaces in parallel girder, and improve from circuital point the orthogonality and sensitivity of output.
The working principle of the invention:
The purpose of the present invention is the sizes of two orthogonal radial shears suffered by detection pivot pin, while needing resist torque load and temperature
Spend the interference of variation.
After shaft pin sensor shaft end is by load, pivot pin generates local deformation, which includes shearing and moment of flexure two
Part, while the parallel girder of quadrature arrangement also generates flexible deformation on elastic element, deformation carries out stress by parallel girder construction
Amplification, can isolate two orthogonal radial shear load suffered by pivot pin without the shadow of bending moment load in conjunction with detection circuit
It rings.
As shown in Figure 12, Figure 13, Figure 14, four foil gauges are pasted on each parallel girder of elastic element 2 respectively, four are answered
Become piece and constitute a favour stone full-bridge, the advantages of radial component in one direction of each favour stone full bridge measurement, full-bridge is can
To resist the influence of temperature change.
Four foil gauge 1A, foil gauge 1B, foil gauge 1C, foil gauge 1D on parallel girder I 12 in shown elastic element 2
The full-bridge of composition, wherein foil gauge 1A, foil gauge 1B form adjacent bridge arm, and foil gauge 1C, foil gauge 1D form an other phase
Adjacent bridge arm.
Four foil gauge 2A, foil gauge 2B on parallel girder II 13 in elastic element 2, foil gauge 2C, foil gauge 2D group
At full-bridge, wherein foil gauge 2A, foil gauge 2B form adjacent bridge arm, and foil gauge 2C, foil gauge 2D form an other Zhi Xianglin
Bridge arm.
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. axial pin type double-shaft radial load cell 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 orthogonal parallel girder structure；The orthogonal parallel girder construction includes two series connection and angle phase
Poor 90 degree of parallel girder and two cylindrical location structures.
2. axial pin type double-shaft radial load cell according to claim 1, it is characterised in that: in each parallel girder
Upper and lower surfaces between there is a gap, which is the positioning of elastic element, installation, crosses line and play booster action；
Two mutual corresponding through-holes I are respectively provided on upper and lower surfaces in each parallel girder.
3. axial pin type double-shaft radial load cell according to claim 2, it is characterised in that: in each parallel girder
A foil gauge is pasted in four through-holes I.
4. axial pin type double-shaft radial load cell 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. axial pin type double-shaft radial load cell according to claim 3, it is characterised in that: glued on each parallel girder
Four foil gauges of patch form a favour stone full-bridge, two uniaxial strain pieces conduct pair on the upper and lower surfaces in parallel girder
Angle bridge arm, the radial component in one direction of a favour stone full bridge measurement.
6. axial pin type double-shaft radial load cell 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. axial pin type double-shaft radial load cell 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. axial pin type double-shaft radial load cell 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. axial pin type double-shaft radial load cell 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 |
|---|---|---|---|
| CN201910022791.0A CN109520652A (en) | 2019-01-10 | 2019-01-10 | Axial pin type double-shaft radial load cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910022791.0A CN109520652A (en) | 2019-01-10 | 2019-01-10 | Axial pin type double-shaft radial load cell |
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| CN109520652A true CN109520652A (en) | 2019-03-26 |
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| CN201910022791.0A Pending CN109520652A (en) | 2019-01-10 | 2019-01-10 | Axial pin type double-shaft radial load cell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843436A (en) * | 2019-11-29 | 2020-02-28 | 江苏徐工工程机械研究院有限公司 | Tractor saddle assembly, control method thereof and tractor |
| 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 |
| CN113237421A (en) * | 2021-05-31 | 2021-08-10 | 中航电测仪器股份有限公司 | Shaft pin-shaped strain sensor |
-
2019
- 2019-01-10 CN CN201910022791.0A patent/CN109520652A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843436A (en) * | 2019-11-29 | 2020-02-28 | 江苏徐工工程机械研究院有限公司 | Tractor saddle assembly, control method thereof and tractor |
| 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 |
| CN113237421A (en) * | 2021-05-31 | 2021-08-10 | 中航电测仪器股份有限公司 | Shaft pin-shaped strain sensor |
| CN113237421B (en) * | 2021-05-31 | 2023-11-17 | 中航电测仪器股份有限公司 | Shaft pin-shaped strain sensor |
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