Composite sensor for detecting axial tension and pressure and axial torque
By using designs such as Wheatstone bridges and stable bearings in the sensor, the problem that the prior art cannot measure axial tension and torque forces at the same time is solved, and more accurate force detection and a more stable device structure are achieved.
Patent Information
- Application Number
- CN202421149278.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The prior art cannot accurately measure axial tension pressure and axial torque force at the same time, and cannot meet actual needs.
A composite sensor is designed, including an elastomer, a torque lower jacket and a tension upper jacket. By pasting resistance strain gauge on both sides of the elastomer, it forms a Wheatstone bridge, and uses the elastomer to sense the micro deformation generated during the stress process. Detect the tension pressure and torque force and read the data through the signal output port.
The simultaneous measurement of axial tension pressure and axial torque force is achieved, the measurement accuracy is improved, the external impact is reduced, and the stability and tamper protection of the device are enhanced through optimization measures such as high temperature, high pressure pasting and stabilizing bearings.
Smart Images
Figure CN222258528U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a composite sensor for detecting axial pulling pressure and axial torque force. Background Art
[0002] The premise for achieving precise control of tensile pressure and torque is to accurately measure and judge the tensile pressure and torque. In the prior art, there are sensors that can achieve basic tensile pressure or torque measurement, but they all measure tensile pressure and torque separately, which cannot meet the demand for simultaneous measurement of tensile pressure and torque. Utility Model Content
[0003] The purpose of the utility model is to provide a composite sensor for detecting axial tensile pressure and axial torque force. The device solves the technical problem that the existing sensors in the prior art can realize basic tensile pressure or torque force measurement, but all measure the tensile pressure and torque force separately and cannot meet the technical problem of simultaneous measurement of tensile pressure and torque force.
[0004] The utility model provides a composite sensor for detecting axial tension and pressure and axial torque, comprising:
[0005] Elastomers;
[0006] A torque lower outer sleeve, which is detachably fixed to the lower end of the outer wall of the elastic body;
[0007] The tension pressure upper jacket is movably connected to the upper end of the torque lower jacket;
[0008] The upper end of the elastic body extends to the outside of the tension pressure upper jacket;
[0009] Resistance strain gauges are attached and fixed to the upper and lower sides of the outer wall of the elastic body;
[0010] The number of the resistance strain gauges on each side is four, and the four resistance strain gauges form a Wheatstone bridge;
[0011] The outer shells of the torque lower outer shell and the tension pressure upper outer shell are detachably fixed with signal output ports;
[0012] The signal output port is electrically connected to the resistance strain gauge on the same side.
[0013] As a further optimization solution, in order to ensure the firmness of the sticking and fixing of the resistance strain gauge, the sticking method of the resistance strain gauge is specifically high-temperature and high-pressure strong sticking.
[0014] As a further optimization scheme, in order to locate the sticking position of the resistance strain gauge, resistance strain gauge installation grooves are opened on the upper and lower sides of the outer wall of the elastic body, and the resistance strain gauge is pasted and fixed in the corresponding resistance strain gauge installation groove.
[0015] As a further optimization solution, in order to stabilize the elastic body and make the detected axial tension and torque more accurate, it also includes:
[0016] A stabilizing bearing, which is installed between the middle of the outer wall of the elastic body and the upper end of the inner wall of the torque-lower outer sleeve;
[0017] A bearing stop sleeve, which is fixedly sleeved on the elastic body;
[0018] The lower end of the bearing stop sleeve abuts against the upper end of the stabilizing bearing.
[0019] As a further optimization solution, in order to facilitate the disassembly and installation of the elastomer and the torque lower sleeve, a sleeve fixing bolt is fixedly connected between the torque lower sleeve and the lower end of the outer wall of the elastomer.
[0020] As a further optimization solution, in order to more stably and firmly fix the torque lower jacket to the lower end of the outer wall of the elastomer, there are four jacket fixing bolts, and the four jacket fixing bolts are distributed circumferentially.
[0021] As a further optimization solution, in order to use a matching model of hexagonal wrench, a specific tool is required to open it, which plays a certain anti-dismantling protection role. The outer sleeve fixing bolt is specifically a hexagonal bolt.
[0022] As a further optimization solution, in order to facilitate the disassembly and installation of the signal output port, port fixing bolts are fixedly connected between the outer shells of the torque lower outer sleeve and the tension upper outer sleeve and the signal output port.
[0023] As a further optimization solution, in order to facilitate the fixation of the end of the elastomer and the connection and fixation with the device under test, a common cross screwdriver is used to facilitate threaded disassembly, and the port fixing bolt is specifically a cross-slot bolt.
[0024] As a further optimization scheme, in order to
[0025] The end surfaces on both sides of the elastic body are both adhered and fixed with connection bases, and the connection bases are provided with threaded connection holes.
[0026] The utility model provides a composite sensor for detecting axial tension and torque force through improvement, which has the following improvements and advantages compared with the prior art:
[0027] Firstly, the device attaches resistance strain gauges forming a Wheatstone bridge on the upper and lower sides of the elastomer respectively, and senses the tensile pressure and torque during the force application process through the elastomer, causing the elastomer to produce micro-deformation. The Wheatstone bridge formed by the resistance strain gauges can sense the micro-changes of the elastomer, causing its resistance to produce linear changes, thereby detecting the tensile pressure and torque values. In the scheme, the Wheatstone bridge formed by the resistance strain gauges on the lower side of the elastomer is used to detect the torque value, and the Wheatstone bridge formed by the resistance strain gauges on the upper side of the elastomer is used to detect the tensile pressure value, thereby meeting the requirements of simultaneous measurement of tensile pressure and torque.
[0028] Secondly, the device fixes the torque lower jacket at the lower end of the elastomer, and movably connects the tensile pressure upper jacket at the upper end of the torque lower jacket, and uses the tensile pressure upper jacket to wrap and protect part of the upper end of the elastomer. The torque lower jacket and the tensile pressure upper jacket play a shielding and protective role to prevent the resistance strain gauge from being affected by the outside. At the same time, the torque lower jacket and the tensile pressure upper jacket play a supporting role to reduce the mutual influence between the tensile pressure and torque force during measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0031] Figure 2 It is a schematic cross-sectional view of the local structure of the utility model;
[0032] Figure 3 For this utility model Figure 2 The structure in the figure is shown in bottom view.
[0033] Description of reference numerals:
[0034] 1-elastic body, 2-torque lower jacket, 3-stable bearing, 4-bearing stop sleeve, 5-tension and pressure upper jacket, 6-signal output port, 7-port fixing bolt, 8-jacket fixing bolt. DETAILED DESCRIPTION
[0035] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0037] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0038] See also Figure 1-3 The utility model provides a technical solution: a composite sensor for detecting axial tension and pressure and axial torque, comprising:
[0039] The elastic body 1 has one end fixed and the other end connected and fixed to the device under test. The elastic body 1 is subjected to the tensile pressure and torque force brought by the device under test, and the elastic body 1 produces micro deformation accordingly.
[0040] The torque lower jacket 2 is detachably fixed to the lower end of the outer wall of the elastic body 1 to shield and protect the lower end of the outer wall of the elastic body 1 and play a supporting role;
[0041] The tension pressure upper jacket 5 is movably connected to the upper end of the torque lower jacket 2. The upper end of the tension pressure upper jacket 5 can move without affecting the transmission of the torque force of the elastic body 1.
[0042] The upper end of the elastic body 1 extends to the outside of the tension and pressure upper jacket 5, and the upper jacket 5 does not fit the outer wall of the elastic body 1 to avoid affecting the transmission of the tension and pressure of the elastic body 1. The tension and pressure upper jacket 5 shields and protects part of the upper end of the elastic body 1 and plays a supporting role;
[0043] Resistance strain gauges are attached and fixed to the upper and lower sides of the outer wall of the elastic body 1;
[0044] The number of resistance strain gauges on each side is four, and the four resistance strain gauges form a Wheatstone bridge;
[0045] The outer shells of the torque lower jacket 2 and the tension pressure upper jacket 5 are detachably fixed with a signal output port 6;
[0046] The signal output port 6 is electrically connected to the resistance strain gauge on the same side. One end of the signal output port 6 is electrically connected to the resistance strain gauge on the same side, and the other end is electrically connected to an external data display instrument, so as to facilitate reading of the tension and torque values.
[0047] In some embodiments, in order to ensure the firmness of the sticking and fixing of the resistance strain gauge, the sticking method of the resistance strain gauge is specifically high-temperature and high-pressure strong sticking.
[0048] In some embodiments, in order to locate the sticking position of the resistance strain gauge, resistance strain gauge installation grooves are opened on the upper and lower sides of the outer wall of the elastic body 1, and the resistance strain gauge is pasted and fixed in the corresponding resistance strain gauge installation groove, and the tensile pressure or torque force can be better transmitted to the resistance strain gauge through this resistance strain gauge installation groove.
[0049] In some embodiments, in order to stabilize the elastic body 1 and make the detected axial tension and pressure and axial torque more accurate, it also includes:
[0050] A stabilizing bearing 3 is installed between the middle of the outer wall of the elastic body 1 and the upper end of the inner wall of the torque lower outer sleeve 2;
[0051] A bearing stop sleeve 4, which is fixedly sleeved on the elastic body 1;
[0052] The lower end of the bearing stop sleeve 4 abuts against the upper end of the stable bearing 3 , and the bearing stop sleeve 4 is used to limit the stable bearing 3 to prevent the stable bearing 3 from moving in series.
[0053] In some embodiments, in order to facilitate the disassembly and installation of the elastomer 1 and the torque lower sleeve 2, a sleeve fixing bolt 8 is fixedly connected between the torque lower sleeve 2 and the lower end of the outer wall of the elastomer 1.
[0054] In some embodiments, in order to more stably and firmly fix the torque lower sleeve 2 on the lower end of the outer wall of the elastomer 1, there are four sleeve fixing bolts 8, and the four sleeve fixing bolts 8 are distributed around the circumference.
[0055] In some embodiments, in order to use a matching model of hexagonal wrench, a specific tool is required to open it, which plays a certain anti-dismantling protection role. The outer sleeve fixing bolt 8 is specifically a hexagonal bolt.
[0056] In some embodiments, in order to facilitate the disassembly and installation of the signal output port 6 , a port fixing bolt 7 is fixedly connected between the outer shells of the torque lower sleeve 2 and the tension upper sleeve 5 and the signal output port 6 .
[0057] In some embodiments, in order to be suitable for a common cross screwdriver and facilitate threaded disassembly, the port fixing bolt 7 is specifically a cross-slot bolt.
[0058] In some embodiments, in order to facilitate the fixation of the end of the elastomer 1 and the connection and fixation with the device to be tested, a connecting base is adhered and fixed to both side end surfaces of the elastomer 1, and a threaded connecting hole is provided on the connecting base. The threaded connecting hole provided on the connecting base is used for connecting bolts, which facilitates the fixation of one end of the elastomer 1 and the connection and fixation of the other end of the elastomer 1 with the device to be tested.
[0059] Working principle:
[0060] When in use, one end of the elastic body 1 is fixed, and the other end of the elastic body 1 is connected and fixed to the device to be tested. The elastic body 1 is subjected to the tensile pressure and torque force brought by the device to be tested, and the elastic body 1 produces a corresponding micro-deformation. The Wheatstone bridge composed of the resistance strain gauge can sense the micro-change of the elastic body, causing its resistance value to produce a linear change, and the tensile pressure value and the torque force value are detected; the Wheatstone bridge composed of the resistance strain gauge on the lower side of the elastic body 1 is used for detecting the torque force value, and the Wheatstone bridge composed of the resistance strain gauge on the upper side of the elastic body 1 is used for detecting the tensile pressure value. One end of the signal output port 6 is electrically connected to the resistance strain gauge on the same side, and the other end is electrically connected to an external data display instrument, so as to facilitate the reading of the tensile pressure value and the torque force value.
[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A composite sensor for detecting axial tension, compression and axial torque, characterized in that: include: Elastomer (1); A torque lower outer sleeve (2) which is detachably fixed to the lower end of the outer wall of the elastic body (1); A tension pressure upper outer sleeve (5) which is movably connected to the upper end of the torque lower outer sleeve (2); The upper end of the elastic body (1) extends to the outside of the tension pressure upper jacket (5); Resistance strain gauges are glued and fixed to the upper and lower sides of the outer wall of the elastic body (1); The number of the resistance strain gauges on each side is four, and the four resistance strain gauges form a Wheatstone bridge; The outer shells of the torque lower outer shell (2) and the tension pressure upper outer shell (5) are detachably fixed with a signal output port (6); The signal output port (6) is electrically connected to the resistance strain gauge on the same side.
2. A composite sensor for detecting axial tension, compression and axial torque according to claim 1, characterized in that: The sticking method of the resistance strain gauge is specifically high-temperature and high-pressure strong sticking.
3. A composite sensor for detecting axial tension, compression and axial torque according to claim 1, characterized in that: Resistance strain gauge installation grooves are provided on both upper and lower sides of the outer wall of the elastic body (1), and the resistance strain gauge is glued and fixed in the corresponding resistance strain gauge installation groove.
4. A composite sensor for detecting axial tension, compression and axial torque according to claim 1, characterized in that: Also includes: A stabilizing bearing (3) is installed between the middle of the outer wall of the elastic body (1) and the upper end of the inner wall of the torque lower outer sleeve (2); A bearing stop sleeve (4) fixedly sleeved on the elastic body (1); The lower end of the bearing stop sleeve (4) abuts against the upper end of the stabilizing bearing (3).
5. A composite sensor for detecting axial tension, compression and torque according to claim 1, characterized in that: A jacket fixing bolt (8) is fixedly connected between the torque lower jacket (2) and the lower end of the outer wall of the elastic body (1).
6. A composite sensor for detecting axial tension, compression and axial torque according to claim 5, characterized in that: The number of the outer sleeve fixing bolts (8) is four, and the four outer sleeve fixing bolts (8) are distributed around the circumference.
7. A composite sensor for detecting axial tension, compression and torque according to claim 5, characterized in that: The outer sleeve fixing bolt (8) is specifically a hexagon socket bolt.
8. A composite sensor for detecting axial tension, compression and axial torque according to claim 1, characterized in that: Port fixing bolts (7) are fixedly connected between the outer shells of the torque lower sleeve (2) and the tension upper sleeve (5) and the signal output port (6).
9. A composite sensor for detecting axial tension, compression and axial torque according to claim 8, characterized in that: The port fixing bolt (7) is specifically a cross-slot bolt.
10. A composite sensor for detecting axial tension, compression and axial torque according to claim 1, characterized in that: A connecting base is adhered and fixed to both side end surfaces of the elastic body (1), and a threaded connecting hole is provided on the connecting base.