CN209802546U - Wide-range three-dimensional force sensor - Google Patents
Wide-range three-dimensional force sensor Download PDFInfo
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- CN209802546U CN209802546U CN201920953377.7U CN201920953377U CN209802546U CN 209802546 U CN209802546 U CN 209802546U CN 201920953377 U CN201920953377 U CN 201920953377U CN 209802546 U CN209802546 U CN 209802546U
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- strain gauge
- resistance strain
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- lower base
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Abstract
The utility model discloses a three-dimensional force transducer of wide range, its structure includes the main part upper base, base under the main part, resistance strain gauge, the output connects, the elastomer, the stiffening beam, be a sensor that can the ascending component of simultaneous measurement three side's power, possess the ability of measuring great atress simultaneously, the three-dimensional force transducer of wide range passes through the structural design of elastomer and realizes the stability of sensor output with the reasonable paster overall arrangement of resistance strain gauge, and the range has been enlarged through the design stiffening beam, mainly used robot manufacturing, automation equipment, intelligent control automatic control equipment, intelligent machine, material check out test set, material stress state analysis, occasions such as spare part work process atress analysis.
Description
Technical Field
The utility model belongs to the sensor field especially relates to a can detect sensor of the component of the three orientation force of object that awaits measuring.
Background
the strain type three-dimensional force sensor has abundant force measurement information and can detect spatial three-dimensional forces (Fx, Fy and Fz). With the acceleration and popularization of the industrial automation process, the development of automatic mechanical equipment such as high-precision processing equipment, a mechanical arm, a robot and the like is increasingly rapid, the development of the equipment has increasingly increased requirements on multi-dimensional force sensors, and the product is suitable for occasions such as robot manufacturing, automatic equipment, intelligent control automatic control equipment, intelligent machines, material detection equipment, material stress state analysis, part working process stress analysis and the like. The core problem of the research instrument for the strain type three-dimensional force sensor is the design of the elastic body of the sensor, and various patent technologies are formed for the research of the three-dimensional force sensor.
However, the existing technical solutions generally have technical defects of complex structure, high processing difficulty, high production cost, low precision of the sensor, mutual interference of force between sensor dimensions, and the like.
Disclosure of Invention
The utility model provides a wide-range three-dimensional force sensor, which comprises a main body upper base, a main body lower base, a resistance strain gauge group, an output joint, an elastic body and a stiffening beam; the main body upper base is provided with a connecting structure connected with a measured object, and two ends of the main body upper base are provided with pin holes connected with the main body lower base; grooves matched with the main body upper base are formed in two sides of the main body lower base, through pin holes are formed in the bottom of the grooves, a recess is formed in the middle of the main body lower base, the resistance strain gauge group comprises a resistance strain gauge group X, a resistance strain gauge group Y and a resistance strain gauge group Z, and the resistance strain gauge group X and the resistance strain gauge group Y are arranged on four walls of the recess; the upper base of the main body is strip-shaped, through holes are formed in two sides of the middle of the upper base, and the resistance strain gauge is arranged in the through holes in a Z-shaped mode; the output joint is connected with the resistance strain gauge group and is arranged on one side of the lower base of the main body, and an elastic body is arranged in the recess and the through hole; the reinforcing beam is an inward T-shaped protrusion of the upper edge and the lower edge of the upper surface of the lower base of the main body;
preferably, the main body upper base and the main body lower base are fastened by matching inner hexagon screws and positioning pins, and the positioning pins are in interference fit with the lower base and keep a radial clearance of 0.02-0.03mm with hole positions of the upper base;
preferably, there are 4 resistance strain gauge groups X, Y and Z, respectively.
Preferably, 4 resistance strain gauge groups X are mounted on the left and right side walls of the recess, two each on each side wall, 4 resistance strain gauge groups Y are mounted on the upper and lower side walls of the recess, two each on each side wall, 4 resistance strain gauge groups Z are mounted on the upper and lower side walls of the through hole, and two each in each through hole;
preferably, the lower base of the main body is provided with a plurality of holes which axially penetrate through the periphery of the lower base of the main body, wherein the axial direction is the same as the direction of the pin holes.
Preferably, the reinforcing beam is a sheet, and the resistance strain gauge X and the resistance strain gauge Y are both located below the reinforcing beam in a direction from the bottom of the recess to the top of the lower base of the main body.
Preferably, the reinforcement beam divides the recess into two C-shapes.
the utility model has the advantages of simple structure, with low costs, precision height, measuring range are wide, the range is big, long service life, simple to operate, be a sensor that has high accuracy, high reliability, and the structure is succinct relatively, and the cost is lower, compares current product, technique and has certain advantage.
Drawings
Fig. 1 is a schematic view of a first viewing angle of the present invention.
Fig. 2 is a sectional view of the utility model a-a.
Figure 3 is a cross-sectional view of the utility model B-B.
Fig. 4 is a schematic view of the overall structure of the present invention.
Detailed Description
Example 1
As shown in fig. 1-4, the structure of the device comprises a main body upper base 1, a main body lower base 2, a resistance strain gauge group, an output connector 3, an elastic body and a reinforcing beam 11; the middle of the upper surface of the main body upper base 1 is provided with a screw hole connected with a measured object, and two ends of the main body upper base are provided with pin holes connected with the main body lower base 2; grooves matched with the main body upper base 1 are formed in two sides of the main body lower base 2, a through pin hole is formed in the bottom of each groove, a recess is formed in the middle of the main body lower base 2, each resistance strain gauge group comprises a resistance strain gauge group X6, a resistance strain gauge group Y5 and a resistance strain gauge group Z7, and the resistance strain gauge group X6 and the resistance strain gauge group Y5 are installed on four walls of the recess; the upper base 1 of the main body is strip-shaped, through holes 10 are formed in two sides of the middle of the upper base, and the resistance strain gauge group Z7 is installed in the through holes 10; the output connector 3 is connected with the resistance strain gauge group and is arranged on one side of the main body lower base 2, and an elastic body is arranged in the recess and the through hole 10; the reinforcing beam 11 is an inward T-shaped protrusion of the upper and lower edges of the upper surface of the main body lower base 2;
More specifically, the main body upper base 1 and the main body lower base 2 are matched and fastened through an inner hexagon screw 4 and a positioning pin 8, the positioning pin 8 is in interference fit with the lower base and keeps a radial clearance of 0.02-0.03mm with an upper base hole site, and the hexagon screws 4 are positioned on two sides of the positioning pin 8;
more specifically, there are 4 resistance strain gauge groups X6, Y5, and Z7, respectively.
More specifically, according to the position relationship of fig. 1, 4 resistance strain gauge groups X6 are uniformly mounted on the left and right side walls of the recess, each side wall is two, and 4 resistance strain gauge groups Y5 are uniformly mounted on the upper and lower side walls of the recess, each side wall is two; according to the position relation of fig. 2, 4 resistance strain gauge groups Z7 are uniformly arranged on the upper and lower side walls of the through holes 10, and each through hole 10 is provided with two through holes;
More specifically, a plurality of holes 9 which axially penetrate through are formed in the periphery of the lower base 2 of the main body, and the axial direction is the same as the direction of the pin holes;
more specifically, the reinforcing beam 11 is a sheet, and the resistance strain gauge X and the resistance strain gauge Y are both located below the reinforcing beam in a direction that the bottom of the recess is lower and the upper surface of the main body lower base is upper;
More specifically, the reinforcing beam 11 divides the recess into two C-shapes, and the distance between each side of the reinforcing beam 11 and the inner side wall of the main body lower base 2 is 1mm-5mm, so that the bearing capacity of the main body lower base can be guaranteed when the main body lower base is subjected to a large force.
The length and width of the wide-range three-dimensional force sensor are all 120mm, the thickness is 30mm, the main material is aviation aluminum alloy 7075T 651, the sensor has high strength, strong corrosion resistance and good mechanical property, can work under severe conditions, and is easy to realize miniaturization, integration and variety diversification in the aspect of structure; the utility model is composed of an upper base and a lower base which are fastened by matching inner hexagon screws and positioning pins, the positioning pins are in interference fit with the lower base and keep a radial clearance of 0.02-0.03mm with the hole sites of the upper base, and when the sensor is not overloaded, the protection pins are not in contact with the holes of the protection pins; when overload occurs, the protection pin is in contact with the hole in the protection pin and prevents the sensor body from being deformed continuously to cause damage, and a reinforcing beam is additionally designed for increasing the measuring range. The measured object is fixed on the upper base of the sensor main body through the screw, when the measured object is stressed, the upper base of the main body and the strain beam of the lower base can be stressed and elastically deformed, so that the strain beam generates strain, the resistance strain gauge pasted on the strain beam converts the stress of the measured object from the elastic strain into resistance change, the resistance change is converted into voltage output through a Wheatstone bridge circuit, the voltage output is obtained through a display instrument, and finally the stress size and direction of the measured object are generated through data analysis and processing, the upper base resistance strain gauge group Z is used for measuring the stress in the Z direction, the lower base resistance strain gauge group X is used for measuring the stress in the X direction, the lower base resistance strain gauge group Y is used for measuring the stress in the Y direction, the difference of the utility model from the common three-dimensional force sensor is that the utility model improves the bearing capacity of the product when being stressed by larger, the product can meet the requirement of large range.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A wide-range three-dimensional force sensor, comprising: the device comprises a main body upper base, a main body lower base, a resistance strain gauge group, an output connector, an elastic body and a reinforcing beam; the main body upper base is provided with a connecting structure connected with a measured object, and two ends of the main body upper base are provided with pin holes connected with the main body lower base; grooves matched with the main body upper base are formed in two sides of the main body lower base, through pin holes are formed in the bottom of the grooves, a recess is formed in the middle of the main body lower base, the resistance strain gauge group comprises a resistance strain gauge group X, a resistance strain gauge group Y and a resistance strain gauge group Z, and the resistance strain gauge group X and the resistance strain gauge group Y are arranged on four walls of the recess; the upper base of the main body is strip-shaped, through holes are formed in two sides of the middle of the upper base, and the resistance strain gauge is arranged in the through holes in a Z-shaped mode; the output joint is connected with the resistance strain gauge group and is arranged on one side of the lower base of the main body, and an elastic body is arranged in the recess and the through hole; the reinforcing beam is an inward T-shaped protrusion of the upper edge and the lower edge of the upper surface of the lower base of the main body.
2. the wide range three-dimensional force sensor of claim 1, wherein: the main body upper base and the main body lower base are matched and fastened through the hexagon socket head cap screws and the positioning pins, and the positioning pins are in interference fit with the lower base and keep a radial clearance of 0.02-0.03mm with hole sites of the upper base.
3. The wide range three-dimensional force sensor of claim 1, wherein: the number of the resistance strain gauge groups X, Y and Z is 4 respectively.
4. The wide range three-dimensional force sensor of claim 3, wherein: 4 resistance strain gauge groups X are arranged on the left side wall and the right side wall of the recess, each side wall is provided with two resistance strain gauge groups Y, 4 resistance strain gauge groups Y are arranged on the upper side wall and the lower side wall of the recess, each side wall is provided with two resistance strain gauge groups Z, the upper side wall and the lower side wall of the through hole are provided with two resistance strain gauge groups Z, and each through hole is provided with two resistance strain gauge groups.
5. The wide range three-dimensional force sensor of claim 1, wherein: a plurality of axially-through holes are formed in the periphery of the lower base of the main body.
6. The wide range three-dimensional force sensor of claim 1, wherein: the reinforcing beam is sheet-shaped, and the resistance strain gauge X and the resistance strain gauge Y are both positioned below the reinforcing beam, and the orientation is that the bottom of the recess is lower and the upper surface of the lower base of the main body is upper.
7. The wide range three-dimensional force sensor of claim 6, wherein: the stiffening beam divides the recess into two C-shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920953377.7U CN209802546U (en) | 2019-06-24 | 2019-06-24 | Wide-range three-dimensional force sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920953377.7U CN209802546U (en) | 2019-06-24 | 2019-06-24 | Wide-range three-dimensional force sensor |
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| CN209802546U true CN209802546U (en) | 2019-12-17 |
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| CN201920953377.7U Active CN209802546U (en) | 2019-06-24 | 2019-06-24 | Wide-range three-dimensional force sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128798A1 (en) * | 2019-12-27 | 2021-07-01 | 中联重科股份有限公司 | Sensor assembly, force detection device and method, and construction machinery |
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2019
- 2019-06-24 CN CN201920953377.7U patent/CN209802546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128798A1 (en) * | 2019-12-27 | 2021-07-01 | 中联重科股份有限公司 | Sensor assembly, force detection device and method, and construction machinery |
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