Double-cantilever-beam type tension sensor

Abstract

A double-cantilever-beam type tension sensor relates to the technical field of force measuring structures and comprises a sensor base, a sensor elastic body is fixed on the sensor base, the sensor elastic body forms two sensor deformation beams through a U-shaped notch, metal strain gauges are fixed on the inner walls of the two sensor deformation beams respectively, and the metal strain gauges are arranged on the two sensor deformation beams. And two groups of bearing assemblies are rotationally arranged at the end parts of the two sensor deformation beams respectively. The utility model solves the problems that in the prior art, a conventional tension sensor is relatively large in size, a textile machine is relatively compact in structure and small in space, the conventional sensor cannot be installed, the conventional textile machine is not provided with tension detection, the tension can only be controlled by experience, the control and adjustment are empirical, and the conventional tension sensor cannot be installed on the textile machine. And no data can be speaked, so that the uniformity of the quality of the finished product cannot be consistent.

Description

Technical Field

[0001] This utility model relates to the field of force measurement structure technology, specifically to a double cantilever beam tension sensor. Background Technology

[0002] Currently, there are some tension measurement devices on the market that use elastomers and strain gauges to measure force, but they are mostly used in ports, hoisting industries, or papermaking industries to measure other large external forces. Their accuracy is poor and they are not suitable for measuring tensions of a few grams to several hundred grams, such as yarn tension. Moreover, high-precision tension sensors with small size and small range are urgently needed in the textile industry.

[0003] A prior art patent with publication number CN205538063U discloses a solution comprising a substrate; a through hole is formed in the center of the substrate; a notch is provided at each of the four corners of the through hole, and the notch is connected to the through hole; four metal strain gauges are attached to the side of the substrate, and the metal strain gauges are located outside each notch. This novel tension sensor has a simple structure, is easy to manufacture, has low cost, and high measurement accuracy. It can measure tension from a few grams to several hundred grams, making it particularly suitable for measuring yarn tension.

[0004] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0005] In the existing technology, conventional tension sensors are relatively large in size. Textile machines are relatively compact and have little space, making it impossible to install conventional sensors. Since there is no tension detection on conventional textile machines, tension control can only be done through experience. This control and adjustment is based on experience and lacks data, so it is impossible to achieve consistent uniformity in the quality of the finished product.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a double cantilever beam tension sensor. This addresses the problem that conventional tension sensors are relatively large in size, and textile machines, with their compact structures and limited space, cannot accommodate conventional sensors. Furthermore, on conventional textile machines, the lack of tension detection necessitates reliance on experience for tension control. This experience-based control and adjustment lacks data, resulting in inconsistent product quality.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A double cantilever beam tension sensor includes a sensor base on which a sensor elastic body is fixed. The sensor elastic body forms two sensor deformation beams through a U-shaped notch. Metal strain gauges are fixed to the inner walls of the two sensor deformation beams respectively.

[0010] Two sets of bearing assemblies are rotatably mounted on the ends of the two sensor deformation beams.

[0011] As an optimized solution, the sensor base is provided with a mounting groove that conforms to the shape of the sensor elastomer. The sensor base is also provided with a first support step and a second support step located on both sides of the mounting groove. The sensor elastomer is supported on the first support step and the second support step, and the sensor deformation beam is suspended in the air through the first support step and the second support step.

[0012] As an optimized solution, the sensor base is provided with a countersunk hole, a magnet is provided in the countersunk hole, the sensor elastomer is provided with a countersunk groove aligned with the countersunk hole, and a positioning pin sleeve for fixing the magnet is provided in the countersunk groove.

[0013] As an optimized solution, a support step is provided at the end of the sensor deformation beam, and a pin hole is provided on the support step, and the bearing assembly is fixed in the pin hole.

[0014] As an optimized solution, the bearing assembly includes a locating pin inserted into the pin hole, the locating pin having a transition step, two bearings arranged side by side being supported above the support step, the top of the locating pin having a threaded groove, a screw being connected in the threaded groove, and the bearing being axially positioned by the screw and the transition step.

[0015] As an optimized solution, an elliptical recess is formed on the bottom surface of the mounting groove, and a wire outlet hole connected to the elliptical recess is formed on the end of the sensor base.

[0016] As an optimized solution, the elliptical sink is provided with a bridge circuit body electrically connected to the metal strain gauge, and a sensor output lead electrically connected to the bridge circuit body is inserted into the outlet hole.

[0017] As an optimized solution, a wire protection spring is fixed to the end of the sensor base, and the wire protection spring is fitted onto the sensor output lead.

[0018] As an optimized solution, a positioning step is fixed on the upper surface of the sensor elastomer, and two first countersunk holes are opened side by side on the positioning step. A first threaded hole is opened on the sensor elastomer that is aligned with the first countersunk hole, and a top screw connected to the first threaded hole is inserted into the first countersunk hole.

[0019] As an optimized solution, the positioning step is also provided with a semi-circular positioning groove that cooperates with the positioning pin sleeve.

[0020] As an optimized solution, the sensor base has two second countersunk holes arranged in parallel, and the sensor elastomer has a second threaded hole that is aligned with the second countersunk holes. A bottom screw that connects to the second threaded hole is inserted into the second countersunk hole.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] A strong magnet is placed in the countersunk hole. The countersunk hole design can prevent the magnet from falling. The magnet can both attach the sensor to the machine platform and the positioning pin above it, preventing it from moving and causing inaccurate positioning.

[0023] When the customer uses it, the positioning pin sleeve is fixed, and a small belt, yarn or cotton thread is passed between the two sets of bearing assemblies. The two sensor deformation beams on the sensor elastomer produce corresponding deformation, and the metal strain gauge attached to it produces a change in resistance, thereby outputting a signal.

[0024] The device is compact in structure and is especially suitable for use in the textile industry. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the assembled structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the sensor elastomer of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the sensor base of this utility model.

[0030] In the diagram: 1-Sensor base; 2-Sensor elastomer; 3-Magnet; 4-Positioning pin sleeve; 5-Positioning step; 6-Positioning pin; 7-Transition step; 8-Threaded groove; 9-Bearing; 10-Screw; 11-Top screw; 12-Bottom screw; 13-Sensor output lead; 14-Wire protection spring; 15-Semi-circular positioning groove; 16-Circular notch; 17-Sunk; 18-Sensor deformation beam; 19-Supporting step; 20-Pin hole; 21-Metal strain gauge; 22-First threaded hole; 23-Second threaded hole; 24-Elliptical recess; 25-Outlet hole; 26-Counterhole; 27-Mounting groove; 28-Supporting step one; 29-Supporting step two. Detailed Implementation

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0032] like Figures 1 to 4 As shown, the double cantilever beam tension sensor includes a sensor base 1, on which a sensor elastic body 2 is fixed. The sensor elastic body 2 forms two sensor deformation beams 18 through a U-shaped notch. Metal strain gauges 21 are respectively fixed on the inner walls of the two sensor deformation beams 18.

[0033] Two sets of bearing assemblies 9 are rotatably mounted on the ends of the two sensor deformation beams 18.

[0034] The sensor base 1 is provided with a mounting groove 27 that conforms to the shape of the sensor elastic body 2. The sensor base 1 is also provided with a first support step 28 and a second support step 29 located on both sides of the mounting groove 27. The sensor elastic body 2 is supported on the first support step 28 and the second support step 29, and the sensor deformation beam 18 is suspended in the air through the first support step 28 and the second support step 29.

[0035] The sensor base 1 has a countersunk hole 26, and a magnet 3 is installed inside the countersunk hole 26. The sensor elastic body 2 has a countersunk groove 17 aligned with the countersunk hole 26, and a positioning pin sleeve 4 for fixing the magnet 3 is installed inside the countersunk groove 17.

[0036] The lower edge of the countersunk hole 26 is provided with a raised step to support the magnet 3.

[0037] The sensor deformation beam 18 has a support step 19 at its end, and the support step 19 has a pin hole 20, in which the bearing 9 assembly is fixed.

[0038] The bearing 9 assembly includes a positioning pin 6 inserted into the pin hole 20. The positioning pin 6 has a transition step 7. Two bearings 9 are arranged side by side above the support step 19. The top of the positioning pin 6 has a threaded groove 8. A screw 10 is connected in the threaded groove 8, and the bearing 9 is axially positioned by the screw 10 and the transition step 7.

[0039] The transition step 7 also prevents the locating pin 6 from falling completely into the pin hole 20 during assembly.

[0040] An elliptical recess 24 is provided on the bottom surface of the mounting groove 27, and a wire outlet hole 25 connected to the elliptical recess 24 is provided on the end of the sensor base 1.

[0041] The elliptical sink 24 contains a bridge circuit body that is electrically connected to the metal strain gauge 21, and the output lead 13 of the sensor that is electrically connected to the bridge circuit body is inserted into the outlet hole 25.

[0042] The metal strain gauge on sensor 2 is connected to the main body of the bridge circuit via enameled wire to form a Wheatstone bridge circuit.

[0043] A wire protection spring 14 is fixed to the end of the sensor base 1, and the wire protection spring 14 is fitted onto the sensor output lead 13.

[0044] A positioning step 5 is fixed on the upper surface of the sensor elastomer 2. Two first countersunk holes are opened side by side on the positioning step 5. A first threaded hole 22 is opened on the sensor elastomer 2, which is aligned with the first countersunk holes. A top screw 11 connected to the first threaded hole 22 is inserted into the first countersunk hole.

[0045] The positioning step 5 is also provided with a semi-circular positioning groove 15 that cooperates with the positioning pin sleeve 4, and the top of the positioning pin sleeve 4 abuts against the lower edge of the semi-circular positioning groove 15.

[0046] The semi-circular positioning groove 15 has a circular notch 16 in front for avoiding misalignment.

[0047] The sensor base 1 has two countersunk holes arranged in parallel. The sensor elastomer 2 has a second threaded hole 23 that is aligned with the second countersunk holes. A bottom screw 12 that is connected to the second threaded hole 23 is inserted into the second countersunk hole.

[0048] The working principle of this device is as follows:

[0049] A strong magnet 3 is placed in the countersunk hole 26. The countersunk hole 26 is designed to prevent the magnet 3 from falling. The magnet 3 can both attach the sensor to the machine platform and attach the positioning pin sleeve 4 above to prevent it from moving and causing inaccurate positioning.

[0050] When the customer uses it, the positioning pin sleeve is fixed at 4 points, and a small belt, yarn or cotton thread is passed between the two sets of bearing 9 components. The two sensor deformation beams 18 on the sensor elastic body 2 produce corresponding deformation, and the metal strain gauge 21 attached to it produces a change in resistance, thereby outputting a signal.

[0051] The device is compact in structure and is especially suitable for use in the textile industry.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. Double cantilever beam tension sensor, characterized in that: The utility model provides a sensor base (1) is provided with sensor elastomer (2) on it, and the sensor elastomer (2) is provided with two sensor deformation beams (18) by U-shaped gap, and the inner wall of two sensor deformation beams (18) is respectively provided with metal strain gauge (21), Two groups of bearings (9) components are respectively arranged on the end of two sensor deformation beams (18).

2. The dual cantilever beam tension sensor of claim 1, wherein: The sensor base (1) is provided with mounting groove (27) that is conformal with sensor elastomer (2) on it, and the sensor base (1) is also provided with support step one (28) and support step two (29) on both sides of mounting groove (27), and sensor elastomer (2) is supported on support step one (28) and support step two (29), and sensor deformation beam (18) is suspended by support step one (28) and support step two (29).

3. The dual cantilever beam tension sensor of claim 1, wherein: The sensor base (1) is provided with counterbore (26), and the counterbore (26) is provided with magnet (3) in it, and the sensor elastomer (2) is provided with sink groove (17) that is aligned with counterbore (26), and the sink groove (17) is provided with positioning pin sleeve (4) that fixes magnet (3) in it.

4. The dual cantilever beam tension sensor of claim 1, wherein: The end of sensor deformation beam (18) is provided with support step (19), and the support step (19) is provided with pin hole (20), and the bearing (9) component is fixed in pin hole (20).

5. The dual cantilever beam tension sensor of claim 4, wherein: The bearing (9) component includes positioning pin (6) inserted into pin hole (20), and the positioning pin (6) is provided with transition step (7), and the top of positioning pin (6) is provided with screw groove (8), and screw (10) is connected in screw groove (8), and the bearing (9) is axially positioned by screw (10) and transition step (7).

6. The dual cantilever beam tension sensor of claim 2, wherein: The bottom surface of mounting groove (27) is provided with oval sink groove (24), and the end of sensor base (1) is provided with wire outlet hole (25) that is communicated with oval sink groove (24).

7. The dual cantilever beam tension sensor of claim 6, wherein: The oval sink groove (24) is provided with group bridge circuit main body that is electrically connected with metal strain gauge (21), and sensor output lead (13) that is electrically connected with group bridge circuit main body is inserted into wire outlet hole (25).

8. The dual cantilever beam tension sensor of claim 3, wherein: The upper surface of sensor elastomer (2) is fixed with positioning step (5), and two first countersunk holes are arranged side by side on the positioning step (5), and sensor elastomer (2) is provided with first screw hole (22) that is aligned with first countersunk hole, and top screw (11) that is connected with first screw hole (22) is inserted into first countersunk hole.

9. The dual cantilever beam tension sensor of claim 8, wherein: The positioning step (5) is also provided with semicircular positioning groove (15) that is matched with positioning pin sleeve (4).

10. The dual cantilever beam tension sensor of claim 1, wherein: Two second countersunk holes are arranged on the sensor base (1) in parallel, a second screw thread hole (23) is arranged on the sensor elastic body (2) and is aligned with the second countersunk hole, and a bottom screw (12) connected with the second screw thread hole (23) is inserted into the second countersunk hole.

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