CN109060196B - Force transducer - Google Patents
Force transducer Download PDFInfo
- Publication number
- CN109060196B CN109060196B CN201811212050.0A CN201811212050A CN109060196B CN 109060196 B CN109060196 B CN 109060196B CN 201811212050 A CN201811212050 A CN 201811212050A CN 109060196 B CN109060196 B CN 109060196B
- Authority
- CN
- China
- Prior art keywords
- lever
- parallel
- strain gauge
- load cell
- deformable region
- 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.)
- Active
Links
- 230000013011 mating Effects 0.000 claims abstract 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 1
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
- G01L1/04—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
The invention provides a force transducer which comprises a fixed end, a stress end, a parallel guide mechanism for connecting the fixed end and the stress end, and a pressure strain gauge. The load cell also includes a lever secured to the parallel guide mechanism and a mating block secured to the lever, the lever extending in a direction parallel to the parallel guide mechanism. The invention provides a load cell, which is characterized in that a lever fixed to a parallel guide mechanism and a mating block fixed to the lever are arranged. When the stress end receives impact force, the seed matching block can avoid the stress end from falling too fast to damage the pressure strain gauge.
Description
Technical Field
The invention relates to a force transducer, in particular to a force transducer used in the weighing field.
Background
The invention relates to a force transducer, in particular to a force transducer used in the weighing field.
Disclosure of Invention
The invention aims to provide a force transducer with an anti-impact mechanism.
According to one aspect of the present invention, there is provided a load cell comprising a fixed end, a load end, a parallel guide mechanism connecting the fixed end and the load end, and a pressure strain gage. The load cell also includes a lever fixed to the parallel guide mechanism and a weight block fixed to the lever, the extending direction of the lever being parallel to the parallel guide mechanism.
In a preferred embodiment, the parallel guide mechanism comprises a first parallel beam and a second parallel beam, the load cell further comprises a first protrusion extending from the first parallel Liang Xiangdi parallel beam, the lever comprises a first lever secured to the first protrusion, and the weight comprises a first weight provided to the first lever.
In a preferred embodiment, the first balancing weight is in threaded connection with the first lever, and the position of the first balancing weight on the first lever can be adjusted by rotating the first balancing weight.
In a preferred embodiment, the first balancing weight is disposed on an opposite side of the fixed end from the stressed end.
In a preferred embodiment, the fixed end is provided with a first through hole, and the first lever passes through the first through hole and is arranged in a clearance with the first through hole.
In a preferred embodiment, the parallel guide mechanism further comprises a second protrusion extending from a parallel beam of the second parallel Liang Xiangdi, a gap being provided between the first protrusion and the second protrusion, the lever comprising a second lever secured to the second protrusion, the weight comprising a second weight provided to the second lever.
In a preferred embodiment, the second balancing weight is in threaded connection with the second lever, the fixed end is provided with a second through hole, and the second lever passes through the second through hole and is in clearance arrangement with the second through hole.
In a preferred embodiment, the parallel guiding mechanism comprises a first parallel beam provided with a first deformable region and a third deformable region and a second parallel beam provided with a second deformable region and a fourth deformable region, the pressure strain gauge comprising a first strain gauge secured to the first deformable region, a second strain gauge secured to the second deformable region, a third strain gauge secured to the third deformable region and a fourth strain gauge secured to the fourth deformable region.
In a preferred embodiment, the first, second, third and fourth strain gages are fixed to the inner side of the load cell, respectively.
The invention provides a force transducer which is provided with a lever fixed to a parallel guide mechanism and a balancing weight fixed to the lever. When the stress end receives impact force, the balancing weight can avoid the stress end to drop too fast to damage the pressure strain gauge.
Drawings
FIG. 1 is a perspective view of a load cell assembly of the present invention.
FIG. 2 is an exploded perspective view of the load cell assembly of the present invention.
FIG. 3 is a cross-sectional view of the load cell assembly of the present invention.
Detailed Description
Referring to fig. 1 to 3, the present invention discloses a load cell assembly 100 including a load cell 1 and a base 2 for fixing the load cell 1. The base 2 in the present invention is only illustrative. Those skilled in the art will readily devise certain designs for them as desired.
The load cell 1 includes a fixed end 124, a stress end 121, and a parallel guide mechanism connecting the fixed end 124 and the stress end 121 together, and a pressure strain gauge 13. The load cell 1 also comprises a lever fixed to the parallel guide mechanism and a weight fixed to the lever. The extending direction of the lever is parallel to the parallel guiding mechanism. In the present invention, the lever and the weight together constitute the impact mechanism 11. When the stress end 121 receives a larger impact force, the anti-impact mechanism 11 can prevent the stress end 121 from falling too fast, so as to avoid damaging the pressure strain gauge 13 due to the falling too fast. When the force-receiving end 121 receives a large impact force F, the load cell 1 will rotate in the direction of arrow a under the impact force F. If the impact prevention mechanism 11 is not provided, the stress end 121 suddenly moves downward to a large extent, and the pressure strain gauge 13 is likely to be damaged. When the impact mechanism 11 is provided, the load cell 1 will tend to rotate in the direction of arrow a when subjected to an impact force F. At this time, the rotation speed of the load cell 1 along arrow a is reduced by the inertia of the impact mechanism 11. Because the impact force F is temporary, the load cell 1 is generally not easily damaged when the impact force F is lost.
The parallel guide mechanism includes a first parallel beam 122 and a second parallel beam 123. The first parallel beam 122 is provided with a first deformable region 1251 and a third deformable region 1261. The second parallel beam 123 is provided with a second deformable region 1252 and a fourth deformable region 1262. The pressure strain gage 13 includes a first strain gage 131 secured to a first deformable region 1251, a second strain gage 132 secured to a second deformable region 1252, a third strain gage 133 secured to a third deformable region 1261, and a fourth strain gage 134 secured to a fourth deformable region 1262. When the stress end 121 is stressed, the parallel guide mechanism moves downwards, and the first strain gauge 131, the second strain gauge 132, the third strain gauge 133 and the fourth strain gauge 134 are elastically deformed. The force applied to the force receiving end 121 is calculated by elastic deformation.
In order to prevent external objects from touching the pressure gauge 13, the first gauge 131, the second gauge 132, the third gauge 133, and the fourth gauge 134 are fixed to the inner side of the load cell, respectively.
The parallel guide mechanism further includes a second protrusion 1231 extending from the second parallel beam 123 to the first parallel beam 122 and a first protrusion 1221 extending from the first parallel beam 122 to the second parallel beam 123. A gap 127 is provided between the first protrusion 1221 and the second protrusion 1231. The gap 127 may allow the parallel guide mechanism to function properly. The lever includes a first lever 1112 fixed to the first protrusion 1221 and a second lever 1122 fixed to the second protrusion 1231.
The impact mechanism 11 includes a first impact mechanism 111 and a second impact mechanism 112. The first impact prevention mechanism 111 includes a first lever 1112 and a first weight 1111 provided to the first lever 1112. The second impact mechanism 112 includes a second lever 1122 and a second weight 1121 provided to the second lever 1122. The first protruding portion 1221 is provided with a first screw hole 1222, and the second protruding portion 1231 is provided with a second screw hole 1232. First lever 1112 is threadably secured within first threaded bore 1222 and second lever 1122 is threadably secured within second threaded bore 1232. When the impact mechanism 11 needs to be replaced, the impact mechanism 11 can be removed only by rotating.
The first weight 1111 is provided with a first screw hole 11111, and the second weight 1121 is provided with a second screw hole 11211. First lever 1112 is threadably coupled to first weight 1111 via first threaded aperture 11111. The second lever 1122 is screwed to the second weight 1121 through the second screw hole 11211. This arrangement allows for easier adjustment of the position of first weight 1111 on first lever 1112 and the position of second weight 1121 on second lever 1122. When the load cell 1 is in a horizontal state, the pressure strain gauge can be in a balanced state by adjusting the position of the balancing weight.
The fixed end 124 is provided with a first through hole 1241 and a second through hole 1242. The first lever 1112 passes through the first through hole 1241 and is disposed in a gap with the first through hole 1241, and the second lever 1122 passes through the second through hole 1242 and is disposed in a gap with the second through hole 1242.
The first balancing weight 1111 is disposed on an opposite side of the fixed end 124 from the force-receiving end 121.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (4)
1. A load cell comprising a fixed end, a force bearing end, a parallel guide mechanism connecting the fixed end and the force bearing end, and a pressure strain gauge, and further comprising a lever fixed to the parallel guide mechanism and a mating block fixed to the lever, wherein the extending direction of the lever is parallel to the parallel guide mechanism, the parallel guide mechanism comprises a first parallel beam and a second parallel beam, the load cell further comprises a first protruding part extending from the first parallel Liang Xiangdi parallel beam, the lever comprises a first lever fixed to the first protruding part, and the mating block comprises a first balancing block arranged on the first lever; the stiff end is equipped with first through-hole, first lever pass from first through-hole and with first through-hole clearance setting, first balancing weight is threaded connection with first lever, through the position of rotating first balancing weight adjustable first balancing weight at first lever, the opposite side of stiff end for the atress end is located to first balancing weight, parallel guiding mechanism still includes the second protruding portion that extends from a parallel Liang Xiangdi parallel roof beam of second, be equipped with the clearance between first protruding portion and the second protruding portion, the lever is including being fixed to the second lever of second protruding portion, the balancing weight is including the second balancing weight of locating the second lever.
2. The load cell of claim 1, wherein the second weight and the second lever are threadably coupled, the fixed end is provided with a second through hole, and the second lever passes through the second through hole and is disposed in a gap with the second through hole.
3. The load cell of claim 1, wherein the parallel guide mechanism comprises a first parallel beam provided with a first deformable region and a third deformable region and a second parallel beam provided with a second deformable region and a fourth deformable region, the pressure strain gauge comprising a first strain gauge secured to the first deformable region, a second strain gauge secured to the second deformable region, a third strain gauge secured to the third deformable region, and a fourth strain gauge secured to the fourth deformable region.
4. The load cell of claim 3, wherein the first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are each secured to an inner side of the load cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212050.0A CN109060196B (en) | 2018-10-12 | 2018-10-12 | Force transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212050.0A CN109060196B (en) | 2018-10-12 | 2018-10-12 | Force transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109060196A CN109060196A (en) | 2018-12-21 |
| CN109060196B true CN109060196B (en) | 2023-11-07 |
Family
ID=64765078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811212050.0A Active CN109060196B (en) | 2018-10-12 | 2018-10-12 | Force transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109060196B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019135732B4 (en) * | 2019-12-23 | 2021-09-23 | Neura Robotics GmbH | Device for measuring a change in length |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0076616A2 (en) * | 1981-10-02 | 1983-04-13 | Maatschappij Van Berkel's Patent N.V. | Load cell with overload protection system |
| CN208751750U (en) * | 2018-10-12 | 2019-04-16 | 苏州科技大学 | Load cell |
-
2018
- 2018-10-12 CN CN201811212050.0A patent/CN109060196B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0076616A2 (en) * | 1981-10-02 | 1983-04-13 | Maatschappij Van Berkel's Patent N.V. | Load cell with overload protection system |
| CN208751750U (en) * | 2018-10-12 | 2019-04-16 | 苏州科技大学 | Load cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109060196A (en) | 2018-12-21 |
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