CN216349289U - Three-component force sensor framework - Google Patents
Three-component force sensor framework Download PDFInfo
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- CN216349289U CN216349289U CN202123076178.9U CN202123076178U CN216349289U CN 216349289 U CN216349289 U CN 216349289U CN 202123076178 U CN202123076178 U CN 202123076178U CN 216349289 U CN216349289 U CN 216349289U
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Abstract
The utility model discloses a three-component force sensor framework, which comprises: the rectangular base body, rectangular base body part divide into first base body portion and second base body portion from top to bottom, be formed with between first base body portion and the second base body portion and hold the chamber, the front middle part symmetry of first base body portion has seted up two long chambeies that link up, the both ends of two long chambeies set up to the round hole, two long chambeies separate first base body portion and form left side roof beam, the installation step, right side roof beam, the fixed screw has been seted up on the installation step, the second base body portion corresponds the position of fixed screw and has seted up the mounting groove that is used for connecting the work piece that awaits measuring, second base body portion middle part level transversely runs through and is equipped with the wire hole, left side roof beam, the lateral wall that right side roof beam corresponds the round hole is used for pasting resistance strain meter, resistance strain meter's lead wire is drawn forth from the wire hole and is connected with external terminal electric property through the terminal in order to realize data transfer. The technical scheme of the utility model solves the problems that the traditional three-component force sensor framework is easy to generate plastic deformation and fracture.
Description
Technical Field
The utility model relates to the technical field of sensors, in particular to a three-component force sensor framework.
Background
The three-component force sensor is also called a multi-axis force sensor, and can measure the static and dynamic stress conditions of an object in three directions of X/Y/Z in real time based on the resistance strain principle. In the bench test of vehicle and whole car way register collection process, all need install three fens force transducer at frame and automobile body tie point, engine mounting end, topcount end, three fens force transducer belong to nonstandard sensor, and short-lived, the price is high, and domestic product is immature, need possess three fens force transducer independently research and development ability based on above characteristics host computer factory. The domestic dynamic three-component force sensor has poor maturity and extremely low market share. Deformation and fracture of the domestic sensor in the using process often occur. Therefore, a sensor with good durability needs to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a three-component force sensor framework, aiming at optimizing the structure and solving the problems of deformation and fracture of the sensor framework.
In order to achieve the above object, the present invention provides a three-component force sensor skeleton, comprising: the rectangular base body part is provided with through grooves symmetrically at two side edges, the through grooves divide the rectangular base body part into a first base body part and a second base body part, an accommodating cavity is formed between the first base body part and the second base body part, two through long cavities are symmetrically formed in the middle of the front face of the first base body part, round holes are formed in two ends of the two long cavities, the two long cavities divide the first base body part into a left side beam, a mounting step and a right side beam, the mounting step is provided with a fixing screw hole, the second base part is provided with a mounting groove corresponding to the fixing screw hole and used for connecting a workpiece to be tested, and a wire outlet hole horizontally penetrates through the middle part of the second base body part, the side walls of the left side beam and the right side beam corresponding to the round holes are used for sticking the resistance strain gauge, and a lead of the resistance strain gauge is led out from the wire outlet hole and is electrically connected with an external terminal through a binding post so as to realize data transmission.
Optionally, the radius of the circular hole is 3.8mm to 4.2 mm.
Optionally, a connecting section is arranged between the first base body portion and the second base body portion, and the connecting section is provided with an elliptical hole slot which is communicated with the through slot.
Optionally, the groove thickness of the elliptical hole groove is 1mm to 1.2mm, the radius of the circular hole is 1mm to 1.2mm, and the center distance of the hole is 19.5mm to 21.5 mm.
Optionally, the thickness of the first base portion is 1.35 to 1.45 times the thickness of the second base portion.
Optionally, the mounting step protrudes from the first base body portion, and a junction between the mounting step and the first base body portion is an arc transition.
Optionally, the fixing screw hole is one and is arranged at the center of the mounting step.
Optionally, a mounting hole is opened on a side of the second base portion facing away from the first base portion, and the mounting hole surrounds the mounting groove.
Optionally, the number of the mounting holes is four and the mounting holes are distributed in a rectangular shape, and the mounting grooves are located in the middle of the four mounting holes.
Optionally, the rectangular base body is made of aluminum alloy or alloy steel or stainless steel.
The technical scheme of the utility model is that a rectangular base body is adopted, through grooves are symmetrically arranged on two side edges of the rectangular base body, the rectangular base body is divided into a first base body part and a second base body part by the through grooves, an accommodating cavity is formed between the first base body part and the second base body part, two through long cavities are symmetrically arranged in the middle of the front surface of the first base body part, two ends of the two long cavities are provided with round holes, the two long cavities separate the first base body part into a left side beam and a mounting step, the right side roof beam, the last fixed screw that has seted up of installation step, the second base member portion corresponds the position of fixed screw and offers the mounting groove that is used for connecting the work piece that awaits measuring, and the horizontal wire hole that runs through is equipped with in second base member portion middle part, and the lateral wall that the left side roof beam, right roof beam correspond the round hole is used for pasting resistance strain gauge, and resistance strain gauge's lead wire is drawn forth and is connected with external terminal electric connection in order to realize data transmission from the wire hole. By optimizing the structure of the three-component force sensor framework, the problem that the three-component force sensor framework is easy to deform and break is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective view of a three-component force sensor skeleton according to an embodiment of the present invention;
FIG. 2 is a top view of the frame of the three-component force sensor of FIG. 1;
FIG. 3 is a bottom view of the tri-component force sensor skeleton of FIG. 1;
FIG. 4 is a left side view of the tri-component force sensor skeleton of FIG. 1;
fig. 5 is a right side view of the three-component force sensor skeleton of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Three-component |
21 | Mounting groove |
| 1 | A |
22 | Wire outlet hole |
| 11 | |
23 | |
| 12 | |
3 | |
| 13 | |
4 | |
| 14 | |
5 | Through |
| 2 | |
6 | Oval hole slot |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The three-component force sensor is also called a multi-axis force sensor, and can measure the static and dynamic stress conditions of an object in three directions of X/Y/Z in real time based on the resistance strain principle. In the bench test of vehicle and whole car way register collection process, all need install three fens force transducer at frame and automobile body tie point, engine mounting end, topcount end, three fens force transducer belong to nonstandard sensor, and short-lived, the price is high, and domestic product is immature, need possess three fens force transducer independently research and development ability based on above characteristics host computer factory. The domestic dynamic three-component force sensor has poor maturity and extremely low market share. Deformation and fracture of the domestic sensor in the using process often occur. Therefore, a sensor with good durability needs to be developed.
The utility model provides a three-component force sensor framework.
Referring to fig. 1 to 5, in an embodiment of the present invention, the three-component force sensor skeleton 10 includes: the rectangular base body part is symmetrically provided with through grooves 5 at two side edges of the rectangular base body part, the rectangular base body part is divided into a first base body part 1 and a second base body part 2 by the through grooves 5, a containing cavity is formed between the first base body part 1 and the second base body part 2, the middle part of the front surface of the first base body part 1 is symmetrically provided with two through long cavities 3, two ends of the two long cavities 3 are provided with round holes 4, the first base body part 1 is divided into a left side beam 11 and an installation step 12 by the two long cavities 3, the right side beam 13 is provided with a fixing screw hole 14 on the mounting step 12, a mounting groove 21 for connecting a workpiece to be tested is formed in the position, corresponding to the fixing screw hole 14, of the second base body part 2, a wire outlet 22 horizontally penetrates through the middle of the second base body part 2, the left side beam 11 and the right side beam 13 are used for sticking a resistance strain gauge corresponding to the side wall of the round hole 4, and a lead of the resistance strain gauge is led out from the wire outlet 22 and is electrically connected with an external terminal through a binding post so as to realize data transmission.
In order to facilitate connection with terminal equipment and subsequent measurement, the resistance strain gauge is adhered to the side wall of the three-component force sensor framework 10, and wiring, moisture prevention, inspection and the like are performed. The resistance strain gauge is connected with the wiring terminal and on the side wall, a wiring harness stitch of a lead wire of the resistance strain gauge is welded on the wiring terminal and is electrically connected with the electronic strain gauge, the lead wire of the resistance strain gauge is led out through the wire outlet hole 22, and a welding joint at the other end of the lead wire is connected with the full-bridge module of the data acquisition equipment.
The measuring principle of the three-component sensor is as follows: when the elastic body of the pressure sensor deforms under the action of external force, the resistance strain gauge attached to the elastic body bends immediately, the resistance value of the resistance strain gauge changes, and the change of the resistance value is converted into an electric signal (generally, a millivolt signal) through a measuring circuit.
Elastomer: the elastomer is a pressure sensor shell, and the main materials of the elastomer are aluminum alloy, alloy steel and stainless steel.
Resistance strain gauge: the pressure of the resistance strain gauge is the most important component of the sensor, the commonly used strain gauge base material adopts a high-molecular thin film material, and the strain material is high-purity constantan generally. The resistance strain gauge is adhered to the elastic body through dehydration, the elastic body is deformed under stress, and the strain gauge is deformed along with the elastic body, so that the resistance value is changed.
A measurement circuit: the resistance change of the resistance strain gauge is converted into a millivolt signal output through a Wheatstone bridge.
Transmission cable: like a 4-core shielded cable, the cable has four wires, red black, green white, red: power supply +, black: power supply-; green: signal +, white: signal-.
The rectangular base body part is made of aluminum alloy or alloy steel or stainless steel, so that the linear force deformation of the rectangular base body part in the whole measuring process is ensured, and the deformation hysteresis is minimum. The three-component force sensor framework 10 can measure in the Fx, Fy and Fz directions, the deformation of the first base body 1 towards the second base body 2 can measure the component force of Fz, and the deformation of two adjacent sides of the rectangular base body along the length direction can measure the component forces of Fx and Fy respectively. The side walls of the left side beam 11 and the right side beam 13 corresponding to the round holes 4 are used for pasting a resistance strain gauge, a strain gauge is pasted on a strain beam area, protective glue is covered outside, and the resistance variation of the strain gauge calculates the pressure and the tension of the sensor and obtains the output signal of the sensor. The protective rubber can be silicon rubber which has long-term chemical stability and excellent performances such as corrosion resistance, moisture resistance, aging resistance, insulation and the like, if the protective sealing is poor, the resistance strain gauge and the strain adhesive layer which are stuck on the elastic element can absorb moisture in the air to generate plasticization, so that the bonding strength and the rigidity are reduced, zero drift and output irregular change are caused, and the force measuring sensor fails.
The technical scheme of the utility model is that a rectangular base body is adopted, through grooves 5 are symmetrically arranged on two side edges of the rectangular base body, the rectangular base body is divided into a first base body 1 and a second base body 2 by the through grooves 5, a containing cavity is formed between the first base body 1 and the second base body 2, two through long cavities 3 are symmetrically arranged in the middle of the front surface of the first base body 1, two ends of the two long cavities 3 are provided with round holes 4, the two long cavities 3 divide the first base body 1 into a left side beam 11 and a mounting step 12, the right side beam 13 is provided with a fixing screw hole 14 on the mounting step 12, a mounting groove 21 for connecting a workpiece to be tested is formed in the position, corresponding to the fixing screw hole 14, of the second base body part 2, a wire outlet 22 horizontally penetrates through the middle of the second base body part 2, the wire outlet 22 is used for a wiring column and a resistance strain gauge to penetrate through, and the left side beam 11 and the right side beam 13 are used for being pasted with the resistance strain gauge corresponding to the side wall of the round hole 4. By optimizing the structure of the three-component force sensor framework 10, the problem that the three-component force sensor framework 10 is easy to deform and break is solved.
In the embodiment, the strength analysis result of the framework 10 of the three-component force sensor shows that the Missess stress is 600MPa to 700MPa, and the durability meets the GEELY chasssirig requirement.
Referring to fig. 1 and 2, in order to ensure that the upper end of the framework has enough deformation, the sensitivity of the circuit part meets the technical requirement. Two ends of the two long cavities 3 are provided with round holes 4, the radius of the round holes 4 is 3.8 mm-4.2 mm, and the stress is 600 MPa-700 MPa.
Referring to fig. 1, 4 and 5, for convenience of installation in measurement, the installation step 12 protrudes from the first base portion 1, and the connection between the installation step 12 and the first base portion 1 is an arc transition. In this embodiment, the mounting step 12 is square, the mounting step 12 protrudes out of the first base portion 1, the circular holes 4 are distributed in four corners of the step in a rectangular shape and located at two ends of the long cavity 3, and the measurement of the force component in three directions is realized through the deformation of the framework structure.
Referring to fig. 1 and 5, in order to ensure and guarantee sufficient deformation of the upper end of the framework, the sensitivity of the circuit part meets the technical requirements. A connecting section is arranged between the first base body part 1 and the second base body part 2, an elliptical hole groove 6 is formed in the connecting section, and the elliptical hole groove 6 is communicated with the through groove 5. An elliptical hole 4 is adopted for slotting, the thickness of the slot is 1 mm-1.2 mm, the radius of the circular hole 4 is 1 mm-1.2 mm, the distance between the centers of the holes is 19.5 mm-21.5 mm, and the stress is 600 MPa-700 MPa.
The thickness of the first base member 1 is 1.35 to 1.45 times the thickness of the second base member 2. The maximum stress is 600 MPa-700 MPa, and the sufficient deformation of the upper end of the framework is ensured, so that the sensitivity of the circuit part meets the technical requirement.
Referring to fig. 1 and 2, specifically, the fixing screw hole 14 is one and is provided at a center position of the mounting step 12. Mounting holes 23 are formed in one side, departing from the first base body part 1, of the second base body part 2, the mounting holes 23 are four and distributed in a rectangular shape, and the mounting groove 21 is located between the four mounting holes 23. The four mounting holes 23 cooperate with screws for securing the tri-component force sensor skeleton 10 to the apparatus. The fixing screw hole 14 of the mounting step 12 can be connected with a component to be measured, the three-component force sensor framework 10 is deformed under the action of external force through the mounting step 12, the resistance strain gauge attached to the three-component force sensor framework 10 is bent immediately, the resistance value of the resistance strain gauge is changed, and the change of the resistance value is converted into an electric signal through a measuring circuit and is transmitted to software of external terminal equipment for displaying.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A three-component force sensor skeleton, comprising: the rectangular base body part is provided with through grooves symmetrically at two side edges, the through grooves divide the rectangular base body part into a first base body part and a second base body part, an accommodating cavity is formed between the first base body part and the second base body part, two through long cavities are symmetrically formed in the middle of the front face of the first base body part, round holes are formed in two ends of the two long cavities, the two long cavities divide the first base body part into a left side beam, a mounting step and a right side beam, the mounting step is provided with a fixing screw hole, the second base part is provided with a mounting groove corresponding to the fixing screw hole and used for connecting a workpiece to be tested, and a wire outlet hole horizontally penetrates through the middle part of the second base body part, the side walls of the left side beam and the right side beam corresponding to the round holes are used for sticking the resistance strain gauge, and a lead of the resistance strain gauge is led out from the wire outlet hole and is electrically connected with an external terminal through a binding post so as to realize data transmission.
2. The frame for a three-split force sensor of claim 1, wherein the circular aperture has a radius of 3.8mm to 4.2 mm.
3. The frame for a three-component force sensor according to claim 1, wherein a connecting section is provided between the first base body portion and the second base body portion, and the connecting section is provided with an elliptical hole groove which is communicated with the through groove.
4. The frame of three-split force sensor as claimed in claim 3, wherein the slot thickness of the elliptical hole slot is 1mm to 1.2mm, the radius of the circular hole is 1mm to 1.2mm, and the center distance of the hole is 19.5mm to 21.5 mm.
5. The frame for a three-split force sensor according to claim 1, wherein the thickness of the first base portion is 1.35 to 1.45 times the thickness of the second base portion.
6. The frame for a three-component force sensor according to claim 1, wherein the mounting step protrudes from the first base portion, and the connection between the mounting step and the first base portion is an arc transition.
7. The frame for a three-component force sensor of claim 1, wherein the fixing screw hole is one and is provided at a center position of the mounting step.
8. The frame for a three-component force sensor according to claim 1, wherein a mounting hole is formed on a side of the second base portion facing away from the first base portion, and the mounting hole surrounds the mounting groove.
9. The frame for a three-component force sensor according to claim 8, wherein the number of the mounting holes is four and the mounting holes are distributed in a rectangular shape, and the mounting groove is located between the four mounting holes.
10. The frame for a three-component force sensor according to claim 1, wherein the rectangular base body is made of aluminum alloy or alloy steel or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123076178.9U CN216349289U (en) | 2021-12-08 | 2021-12-08 | Three-component force sensor framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123076178.9U CN216349289U (en) | 2021-12-08 | 2021-12-08 | Three-component force sensor framework |
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| Publication Number | Publication Date |
|---|---|
| CN216349289U true CN216349289U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123076178.9U Active CN216349289U (en) | 2021-12-08 | 2021-12-08 | Three-component force sensor framework |
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|---|---|
| CN (1) | CN216349289U (en) |
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2021
- 2021-12-08 CN CN202123076178.9U patent/CN216349289U/en active Active
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