CN112504521A - Pin type force sensor - Google Patents
Pin type force sensor Download PDFInfo
- Publication number
- CN112504521A CN112504521A CN202011238838.6A CN202011238838A CN112504521A CN 112504521 A CN112504521 A CN 112504521A CN 202011238838 A CN202011238838 A CN 202011238838A CN 112504521 A CN112504521 A CN 112504521A
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- China
- Prior art keywords
- strain gauge
- patch
- patch hole
- force sensor
- hole
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- 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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- 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
- G01L1/225—Measuring circuits therefor
-
- 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)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses an axle pin type force sensor, comprising: the device comprises a shell, a shaft pin part and a connector, wherein a conditioning amplifying circuit is arranged in the shell; the shaft pin part is integrally connected with the shell, a positioning bayonet is arranged at the joint of the shaft pin part and the shell, and a strain assembly is arranged in the shaft pin part and used for measuring and converting radial force strain into an electric signal; the connector is arranged on the side wall of the shell, and the strain component, the conditioning amplifying circuit and the connector are electrically connected in sequence. The sensor is installed and used by arranging the positioning bayonet at the joint of the shell and the shaft pin part, so that the structure of the shaft pin part is not easy to damage under stress.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a shaft pin type force sensor.
Background
The pin type force sensor is actually a hollow section round shaft bearing a shearing force, the double-shear type resistance strain gauges are adhered to the center of a groove in a central hole, two bridge combination measuring modes are provided, namely, the double-shear type resistance strain gauges at two grooves jointly form a Wheatstone bridge, or respectively form the Wheatstone bridges and then are connected in parallel for measurement, and then signal transmission is carried out through the form of electric signal transmission. However, the existing shaft pin type force sensor is easy to be stressed unevenly in installation and use.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the shaft pin type force sensor, the connection part of the shell and the shaft pin part is provided with the positioning bayonet for mounting and using the sensor, and the structure of the shaft pin part is not easy to damage when the force is applied.
An axial pin force sensor according to the invention comprises: the conditioning amplifier circuit is arranged in the shell; the shaft pin part is integrally connected with the shell, a positioning bayonet is arranged at the joint of the shaft pin part and the shell, and a strain assembly is arranged in the shaft pin part and used for measuring and converting radial force strain into an electric signal; the connector, the connector set up in the lateral wall of casing, the subassembly that meets an emergency, the conditioning amplifier circuit with the connector electricity is connected in proper order.
The shaft pin type force sensor has the following beneficial effects: integrate the subassembly that meets an emergency in pivot portion, realize the atress based on pivot portion and bear, the cooperation subassembly that meets an emergency turns into the signal of meeting an emergency electricity with atress strain and carries out the sensing measurement, through the location bayonet socket block that is equipped with pivot portion and casing junction when using the sensor, a fixed block that is used for supplying the outside to wait to detect device when pivot formula force transducer fixed mounting uses, make the atress major part of erection bracing concentrate on the casing, the position of location bayonet socket setting does not influence the use of pivot formula force transducer and more pleasing to the eye simultaneously.
According to some embodiments of the invention, a first patch hole, a second patch hole, a third patch hole and a fourth patch hole are formed in the side wall of the axle pin portion, the first patch hole is adhered with a first strain gauge, the second patch hole is adhered with a second strain gauge, the third patch hole is adhered with a third strain gauge, the fourth patch hole is adhered with a fourth strain gauge, the strain assembly includes a wheatstone bridge composed of the first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge, and an output end of the wheatstone bridge is connected to an input end of the conditioning and amplifying circuit.
According to some embodiments of the present invention, the first patch hole and the second patch hole are disposed at both sides of the shaft pin portion in symmetry, and the third patch hole and the fourth patch hole are disposed at both sides of the shaft pin portion in symmetry.
According to some embodiments of the invention, the axle pin portion side wall further comprises a first annular groove and a second annular groove, the first annular groove connecting the first patch hole and the second patch hole, the second annular groove connecting the third patch hole and the fourth patch hole.
According to some embodiments of the invention, the first strain gauge is electrically connected to the second strain gauge inside the dowel portion, the second strain gauge is electrically connected to the third strain gauge inside the dowel portion, the third strain gauge is electrically connected to the fourth strain gauge inside the dowel portion, and the fourth strain gauge is electrically connected to the first strain gauge inside the dowel portion.
According to some embodiments of the invention, the bottom of the shaft pin part is also provided with a precision hole.
According to some embodiments of the present invention, the sealing cover further comprises four sealing covers, and the sealing covers are respectively and hermetically disposed in the first patch hole, the second patch hole, the third patch hole and the fourth patch hole.
According to some embodiments of the invention, the sealing cover is laser welded to the first patch hole, the second patch hole, the third patch hole, and the fourth patch hole, respectively.
According to some embodiments of the invention, the housing has a diameter greater than a diameter of the pintle portion.
According to some embodiments of the invention, the housing comprises a housing body, a rear shell and a sealing ring, the housing body and the rear shell are connected through a screw, the sealing ring is arranged between the housing body and the rear shell, and the sealing ring is matched with the housing body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the construction of a spindle-pin force sensor of the present invention;
FIG. 2 is an exploded view of the spindle-pin force sensor of the present invention;
fig. 3 is a cross-sectional view of the spindle pin force sensor of the present invention.
The reference numbers are as follows:
the sealing device comprises a shell 110, a rear shell 111, a sealing ring 112, a screw 113, a shaft pin part 120, a positioning bayonet 121, a connector 130, a first patch hole 141, a second patch hole 142, a third patch hole 143, a fourth patch hole 144, a sealing cover 150, a first annular groove 160, a second annular groove 170 and a precision hole 180.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, the present invention provides an axle-pin force sensor, comprising: the device comprises a shell 110, a shaft pin part 120 and a connector 130, wherein the shell 110 and the shaft pin part 120 are designed in an integrated mode, a positioning bayonet 121 is arranged at the joint of the shell 110 and the shaft pin part 120 and used for fixedly clamping an external device to be detected when the shaft pin type force sensor is fixedly installed, so that most of the stress of installation and support is concentrated on the shell 110, and meanwhile, the position of the positioning bayonet 121 does not influence the use of the shaft pin type force sensor and is more attractive; the inside conditioning amplifier circuit that still is equipped with of casing 110 for realize the calibration and the transmission of electric signal and amplify output electric signal, the inside subassembly that meets an emergency that is equipped with of pivot portion 120 for measure and change radial force and meet an emergency and become the electric signal, connector 130 set up in the lateral wall of casing 110, the subassembly that meets an emergency, conditioning amplifier circuit and connector 130 electricity are connected in proper order.
In some embodiments of the present invention, a first patch hole 141, a second patch hole 142, a third patch hole 143, and a fourth patch hole 144 are formed in a sidewall of the shaft pin portion 120, a first strain gauge is attached to the first patch hole 141, a second strain gauge is attached to the second patch hole 142, a third strain gauge is attached to the third patch hole 143, a fourth strain gauge is attached to the fourth patch hole 144, the strain assembly includes a wheatstone bridge including the first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge, and an output end of the wheatstone bridge is connected to an input end of the conditioning and amplifying circuit.
It should be noted that the four strain gauges can be selected and matched according to the type of required force, when the pivot pin portion 120 is affected by radial force, the wheatstone bridge can transmit the generated strain to the conditioning and amplifying circuit through an electric signal, the conditioning and amplifying circuit can further amplify and output the electric signal to the connector 130, the connector 130 finally outputs the amplified signal to an external monitoring end (such as a PLC, an industrial personal computer and the like) through an external cable, and in industrial production, a manager can know the stress measurement condition of the pivot pin portion 120 in real time through the PLC or the industrial personal computer; the four patch holes can provide space for placing the strain gauge, so that the strain gauge can be stably arranged on the shaft pin part 120.
In some embodiments of the present invention, the first and second patch holes 141 and 142 are disposed at both symmetrical sides of the axle pin portion 120, and the third and fourth patch holes 143 and 144 are disposed at both symmetrical sides of the axle pin portion 120.
In some embodiments of the present invention, the sidewall of the shaft pin portion 120 further includes a first annular groove 160 and a second annular groove 170, the first annular groove 160 connects the first patch hole 141 and the second patch hole 142, and the second annular groove 170 connects the third patch hole 143 and the fourth patch hole 144.
Referring to fig. 3, in some embodiments of the present invention, a first strain gauge is electrically connected to a second strain gauge inside a shaft pin portion 120, the second strain gauge is electrically connected to a third strain gauge inside the shaft pin portion 120, the third strain gauge is electrically connected to a fourth strain gauge inside the shaft pin portion 120, and the fourth strain gauge is electrically connected to the first strain gauge inside the shaft pin portion 120. The strain gauges are electrically connected by grooving the inside of the shaft pin portion 120.
In some embodiments of the present invention, each patch hole is provided with a corresponding sealing cover 150 for sealing the patch hole, protecting the strain gauge inside the patch hole, preventing the strain gauge from falling off during use, and simultaneously playing a role in water and dust prevention, specifically, the sealing cover 150 and the patch hole may be in a snap-fit connection, a paste-fit connection, and a laser welding manner, and the connection and fixation manner is not limited in the present invention, and a person skilled in the art can reasonably design according to actual application conditions.
In some embodiments of the present invention, the bottom of the shaft pin portion 120 is further provided with a precision hole 180, and the precision hole 180 can be used to adjust the measurement precision of the sensor before the sensor is manufactured.
In some embodiments of the present invention, the diameter of the housing 110 is greater than that of the shaft pin portion 120, and the design can make the bearable stress strength of the housing 110 greater than that of the shaft pin portion 120, so as to ensure that the shaft pin portion 120 can still be stably connected with the shaft pin portion 120 under the action of radial force, and no displacement occurs between the two.
In some embodiments of the present invention, the housing 110 includes a housing body, a rear housing 111 and a sealing ring 112, the housing body and the rear housing 111 are connected by a screw 113, but may be connected by a snap connection or a glue adhesion, and the sealing ring 112 is disposed between the housing body and the rear housing 111, and the sealing ring 112 is matched with the housing body to perform a sealing function.
In some embodiments of the present invention, if the conditioning amplifier circuit is used only for industrial production, a power conversion circuit may be further disposed between the conditioning amplifier circuit and the signal plug, and the power conversion circuit may convert the electrical signal output by the amplification into an industrial standard electrical signal (with a specification such as 0-5V, 4-20mA, etc.), which is more convenient for industrial monitoring and viewing.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. An axle-pin force sensor, comprising:
the conditioning amplifier circuit is arranged in the shell;
the shaft pin part is integrally connected with the shell, a positioning bayonet is arranged at the joint of the shaft pin part and the shell, and a strain assembly is arranged in the shaft pin part and used for measuring and converting radial force strain into an electric signal;
the connector, the connector set up in the lateral wall of casing, the subassembly that meets an emergency, the conditioning amplifier circuit with the connector electricity is connected in proper order.
2. The shaft pin type force sensor according to claim 1, wherein a first patch hole, a second patch hole, a third patch hole and a fourth patch hole are formed in a side wall of the shaft pin portion, a first strain gauge is adhered to the first patch hole, a second strain gauge is adhered to the second patch hole, a third strain gauge is adhered to the third patch hole, a fourth strain gauge is adhered to the fourth patch hole, the strain assembly includes a wheatstone bridge composed of the first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge, and an output end of the wheatstone bridge is connected to an input end of the conditioning and amplifying circuit.
3. The axle-pin force sensor of claim 2, wherein the first patch hole and the second patch hole are disposed on symmetrical sides of the axle pin portion, and the third patch hole and the fourth patch hole are disposed on symmetrical sides of the axle pin portion.
4. The spindle pin force sensor of claim 3, wherein the spindle pin portion side wall further comprises a first annular groove and a second annular groove, the first annular groove connecting the first patch hole and the second patch hole, the second annular groove connecting the third patch hole and the fourth patch hole.
5. The axle pin force sensor of claim 2, wherein the first strain gauge is electrically connected to the second strain gauge within the axle pin portion, the second strain gauge is electrically connected to the third strain gauge within the axle pin portion, the third strain gauge is electrically connected to the fourth strain gauge within the axle pin portion, and the fourth strain gauge is electrically connected to the first strain gauge within the axle pin portion.
6. The axle pin force sensor of claim 1, wherein the bottom of the axle pin is further provided with a precision hole.
7. The axle pin force sensor of claim 2, further comprising four sealing caps, wherein the sealing caps are sealingly disposed in the first patch aperture, the second patch aperture, the third patch aperture, and the fourth patch aperture, respectively.
8. The axle-pin force sensor of claim 7, wherein the seal cap is laser welded to the first, second, third, and fourth patch apertures, respectively.
9. The spindle pin force sensor of claim 1, wherein a diameter of the housing is greater than a diameter of the spindle pin.
10. The axle pin force sensor of claim 1, wherein the housing comprises a housing body, a back shell, and a seal ring, the housing body is connected to the back shell via a screw, the seal ring is disposed between the housing body and the back shell, and the seal ring is mated to the housing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238838.6A CN112504521A (en) | 2020-11-09 | 2020-11-09 | Pin type force sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238838.6A CN112504521A (en) | 2020-11-09 | 2020-11-09 | Pin type force sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112504521A true CN112504521A (en) | 2021-03-16 |
Family
ID=74955656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011238838.6A Pending CN112504521A (en) | 2020-11-09 | 2020-11-09 | Pin type force sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112504521A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160033344A1 (en) * | 2014-07-30 | 2016-02-04 | Dayton T. Brown, Inc. | Structural shear load sensing pin |
| CN109520652A (en) * | 2019-01-10 | 2019-03-26 | 徐州徐工挖掘机械有限公司 | Axial pin type double-shaft radial load cell |
| CN109520653A (en) * | 2019-01-10 | 2019-03-26 | 徐州徐工挖掘机械有限公司 | The uniaxial radial load cell of axial pin type |
| CN209764304U (en) * | 2019-05-28 | 2019-12-10 | 江门市英合创展电子有限公司 | Axial pin type radial force cell sensor |
| CN211504475U (en) * | 2020-03-11 | 2020-09-15 | 北京天工俊联工业装备技术有限公司 | Pin shaft type force sensor device |
-
2020
- 2020-11-09 CN CN202011238838.6A patent/CN112504521A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160033344A1 (en) * | 2014-07-30 | 2016-02-04 | Dayton T. Brown, Inc. | Structural shear load sensing pin |
| CN109520652A (en) * | 2019-01-10 | 2019-03-26 | 徐州徐工挖掘机械有限公司 | Axial pin type double-shaft radial load cell |
| CN109520653A (en) * | 2019-01-10 | 2019-03-26 | 徐州徐工挖掘机械有限公司 | The uniaxial radial load cell of axial pin type |
| CN209764304U (en) * | 2019-05-28 | 2019-12-10 | 江门市英合创展电子有限公司 | Axial pin type radial force cell sensor |
| CN211504475U (en) * | 2020-03-11 | 2020-09-15 | 北京天工俊联工业装备技术有限公司 | Pin shaft type force sensor device |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |