A new type of bending-resistant torque sensor

Abstract

The application discloses a novel anti-bending torque sensor and belongs to the technical field of torque calibration. The novel anti-bending torque sensor comprises a torsion-resistant shell, a self-lubricating bearing, an adapter and a star-shaped elastic body. The star-shaped elastic body is arranged in the interior of the torsion-resistant shell, the adapter is arranged on the upper end of the star-shaped elastic body, and the self-lubricating bearing is arranged between the torsion-resistant shell and the adapter. Strain gauges are arranged on the star-shaped elastic body. The strain gauges are attached to the star-shaped elastic body. Torque is transmitted to the star-shaped elastic body through the adapter. The adapter is twisted. Through the action of the self-lubricating bearing, lateral bending deformation is overcome, the influence of friction torque is reduced, the bending moment influence caused by lateral force is realized, and therefore the calibration accuracy and assembly quality are improved.

Description

Technical Field

[0001] This application relates to the field of torque calibration technology, and to a novel bending-resistant torque sensor. Background Technology

[0002] With the rapid development of my country's industry, the requirements for equipment assembly quality in fields such as shipbuilding, hydropower, automobiles, aviation, aerospace, wind power, and nuclear power are becoming increasingly stringent. Especially in equipment such as diesel engines, generators, and motors, the accuracy of tightening torque is crucial. Therefore, manufacturing units across various industrial sectors are paying increasing attention to the accuracy of torque values ​​for tools such as hydraulic wrenches, manual wrenches, and torque multipliers. The accuracy of the torque of these tools directly affects the quality of assembly; therefore, users also place great importance on the torque measurement of tightening tools.

[0003] However, torque calibration equipment cannot function without torque sensors. Many tightening tools experience lateral forces during calibration, and these lateral forces, due to their uneven loading, introduce errors into the accuracy of torque calibration, thus affecting the precision of the tightening tools. Furthermore, different operators using different methods can create varying bending moments, significantly impacting the tightening tools. Moreover, hydraulic wrenches and electric / pneumatic wrenches often experience sudden increases in lateral force during calibration due to their own impact, generating significant bending moments on the torque sensor and affecting its accuracy, further compromising the accuracy of torque calibration. Summary of the Invention

[0004] The purpose of this application is to provide a novel bending torque sensor to overcome the shortcomings of the prior art. By attaching strain gauges to a star-shaped elastomer, the torque is transmitted to the star-shaped elastomer through an adapter. The adapter is twisted, and through the action of a self-lubricating bearing, lateral bending deformation is overcome and the influence of frictional torque is reduced, thereby realizing the effect of bending moment caused by lateral force, thus improving calibration accuracy and assembly quality.

[0005] To address the aforementioned technical problems, this application discloses a novel bending-resistant torque sensor, comprising an anti-torsion housing, a self-lubricating bearing, an adapter, and a star-shaped elastomer; the star-shaped elastomer is disposed inside the anti-torsion housing, the adapter is disposed at the upper end of the star-shaped elastomer, the self-lubricating bearing is disposed between the anti-torsion housing and the adapter, and strain gauges are disposed on the star-shaped elastomer.

[0006] Preferably, the anti-torque housing includes an upper housing and a lower housing, wherein the outer side of the upper housing is an external gear structure with a module of 1.5-2.5 and a number of teeth of 72-80, and the inner side of the lower housing is an internal gear structure with a module of 1.5-2.5 and a number of teeth of 55-60.

[0007] Preferably, the torque housing is connected to the calibration equipment via an external gear structure at the top of the housing and an internal gear structure at the bottom of the housing.

[0008] Preferably, the star-shaped elastomer includes a top, a deformation portion, and a bottom. The top is an octagonal star structure, the bottom is an external gear structure with a module of 1.5 and 55 teeth, and the area between the top and the bottom is the deformation portion.

[0009] Preferably, the inner structure of the adapter is connected to the octagonal star structure of the star-shaped elastomer, and the outer structure of the adapter is cylindrical.

[0010] Preferably, the bottom of the star-shaped elastomer is connected to the base of the calibration equipment.

[0011] Preferably, the strain gauge is attached to the deformed part; further, there are two or more strain gauges.

[0012] Preferably, the strain gauges are 2, 4, or 8.

[0013] Preferably, the adapter is connected to the tightening tool being calibrated, and the tightening tool being calibrated may be of different types and sizes.

[0014] Compared with the prior art, this application has the following advantages: First, by attaching strain gauges to a star-shaped elastomer, torque is transmitted to the star-shaped elastomer through an adapter. The adapter is twisted, and through the action of a self-lubricating bearing, the novel bending torque sensor of this application has excellent bending moment resistance, which can effectively reduce the impact of lateral force on torque calibration.

[0015] Secondly, the novel bending torque sensor of this application can withstand a maximum load of 30,000 Nm, is lightweight, has a reliable structure, and is easy to calibrate on-site.

[0016] Third, the adapter connects to the tightening tool being calibrated. The tightening tools being calibrated vary in type and size. By using different adapter fixtures to fix them to the adapter, the bending torque sensor of this application can meet the torque calibration needs of tightening tools of different types and sizes, and has great potential for widespread application. Attached Figure Description

[0017] The advantages of this application, as described above and / or in other aspects, will become clearer from the following detailed description in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a front view of a novel bending-resistant torque sensor according to an embodiment of this application; Figure 2 This is an axial view of an embodiment of the torsion-resistant housing of this application; Figure 3 This is an axial view of a star-shaped elastomer according to an embodiment of this application; Figure 4 This is an axial view of an adapter according to an embodiment of this application.

[0019] The diagram shows: 1. Anti-torsion housing, 2. Self-lubricating bearing, 3. Adapter, 4. Star-shaped elastomer, 5. Upper part of housing, 6. Lower part of housing, 7. Top, 8. Deformation part, 9. Bottom. Detailed Implementation

[0020] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0021] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a novel bending torque sensor according to an embodiment of this application is shown. The novel bending torque sensor provided in one embodiment of this application includes a torsion-resistant housing 1, a self-lubricating bearing 2, an adapter 3, and a star-shaped elastomer 4. The star-shaped elastomer 4 is disposed inside the torsion-resistant housing 1, the adapter 3 is disposed on the upper end of the star-shaped elastomer 4, the self-lubricating bearing 2 is disposed between the torsion-resistant housing 1 and the adapter 3, and strain gauges are disposed on the star-shaped elastomer 4.

[0022] In one embodiment, the anti-torsion housing includes an upper housing 5 and a lower housing 6. The outer side of the upper housing 5 is an external gear structure with a module of 1.5-2.5 and a number of teeth of 72-80, and the inner side of the lower housing 6 is an internal gear structure with a module of 1.5-2.5 and a number of teeth of 55-60. The anti-torsion housing 1 is made of 7075 aluminum alloy.

[0023] Furthermore, the torque housing 1 is connected to the calibration equipment via the external gear structure of the upper housing 5 and the internal gear structure of the lower housing 6.

[0024] In one embodiment, the star-shaped elastomer 4 includes a top 7, a deformation portion 8, and a bottom 9. The top 7 is an octagonal star structure, and the bottom 9 is an external gear structure with a module of 1.5 and a number of teeth of 55. The area between the top 7 and the bottom 9 is the deformation portion 8, and the star-shaped elastomer 4 is made of 40CrNiMo.

[0025] Furthermore, the inner structure of the adapter 3 is connected to the octagonal star structure of the star-shaped elastomer 4, the outer structure of the adapter 3 is cylindrical, and the material of the adapter 3 is 42CrMo.

[0026] Furthermore, the bottom of the star-shaped elastomer 4 is connected to the base of the calibration equipment.

[0027] Furthermore, the strain gauge is attached to the deformed part 8. The strain gauge does not necessarily need to completely cover the deformed part. Furthermore, there are two or more strain gauges. Preferably, there are 2, 4 or 8 strain gauges.

[0028] In one embodiment, the adapter 3 is connected to the tightening tool to be calibrated. The tightening tools to be calibrated are of different types and sizes. By fixing different adapter fixtures to the adapter, the bending moment problem of different tightening tools can be overcome, and the torque calibration requirements of different types and sizes of tightening tools can be met at the same time.

[0029] During operation, the anti-torsion housing 1 is mounted on the calibration equipment via an external gear. The tightening tool being calibrated is connected to the adapter 3 via an internal gear structure. Strain gauges are evenly applied to the outer surface of the star-shaped elastomer 4. Static torque is transmitted to the star-shaped elastomer 4 through the adapter 3. The tightening tool being calibrated is driven by a hydraulic pump, causing it to rotate. The torque of the tool causes the adapter 3 to undergo torsional deformation, which is detected by the strain gauges on the star-shaped elastomer. The self-lubricating bearing 2 overcomes lateral bending deformation and reduces the influence of frictional torque, thereby mitigating the bending moment caused by lateral forces.

[0030] This application utilizes a torque sensor composed of gears. During operation, the ingenious combination of an anti-torsion housing and a self-lubricating bearing reduces the bending deformation of the star-shaped elastomer caused by lateral forces. After loading, it can accurately transmit torque. The structure is robust, highly reliable, and easy to operate.

[0031] This application provides a novel bending-resistant torque sensor. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A novel bending-resistant torque sensor, characterized in that, It includes an anti-torsion shell, a self-lubricating bearing, an adapter, and a star-shaped elastomer; the star-shaped elastomer is disposed inside the anti-torsion shell, the adapter is disposed on the upper end of the star-shaped elastomer, the self-lubricating bearing is disposed between the anti-torsion shell and the adapter, and strain gauges are disposed on the star-shaped elastomer.

2. The novel bending-resistant torque sensor according to claim 1, characterized in that, The anti-torsion shell includes an upper shell and a lower shell. The outer side of the upper shell is an external gear structure with a module of 1.5-2.5 and a number of teeth of 72-80, and the inner side of the lower shell is an internal gear structure with a module of 1.5-2.5 and a number of teeth of 55-60.

3. A novel bending-resistant torque sensor according to claim 2, characterized in that, The torque housing is connected to the calibration equipment via an external gear structure at the top of the housing and an internal gear structure at the bottom of the housing.

4. A novel bending-resistant torque sensor according to claim 1, characterized in that, The star-shaped elastomer includes a top, a deformation portion, and a bottom. The top is an octagonal star structure, and the bottom is an external gear structure with a module of 1.5 and 55 teeth. The area between the top and the bottom is the deformation portion.

5. A novel bending-resistant torque sensor according to claim 4, characterized in that, The inner structure of the adapter is connected to the octagonal star structure of the star-shaped elastomer, and the outer structure of the adapter is cylindrical.

6. A novel bending-resistant torque sensor according to claim 4, characterized in that, The bottom of the star-shaped elastomer is connected to the base of the calibration equipment.

7. A novel bending-resistant torque sensor according to claim 4, characterized in that, The strain gauge is attached to the deformed part.

8. A novel bending-resistant torque sensor according to claim 7, characterized in that, There are two or more strain gauges.

9. A novel bending-resistant torque sensor according to claim 8, characterized in that, The strain gauges are 2, 4, or 8 in number.

10. A novel bending-resistant torque sensor according to claim 1, characterized in that, The adapter is connected to the tightening tool being calibrated, and the tightening tool being calibrated has different types and sizes.

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