Annular strain gauge for measuring torque

Abstract

The utility model discloses an annular strain gauge for measuring torque, which is used for measuring the torque of a belt pulley shaft. The annular strain gauge for measuring the torque comprises a main body, a sensitive grid and a wiring contact, the main body is in a closed circular ring shape, the sensitive grid is arranged on the front surface of the main body in a non-closed circular shape, and wiring contacts are arranged at end points of the sensitive grid; the sensitive grid is used for measuring the torque of the belt pulley shaft, and the wiring contact is used for electrically connecting the annular strain gauge with the radio transmission module through a lead.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of strain gauge, and in particular to a ring-shaped strain gauge for measuring torque. BACKGROUND

[0002] In industrial automation and mechanical transmission system, torque measurement is one of the key parameters for evaluating the performance and efficiency of transmission device. In the prior art, strain gauges are widely used for measuring torque on rotating components such as pulley shafts due to their high precision, high sensitivity and good linearity. The existing strain gauges are directly attached to the side wall of the pulley shaft, and usually require an extended portion of the shaft body to facilitate the installation and fixation of the strain gauge and its related measurement circuit. However, this design requirement limits the application range of strain gauge measurement technology. For many compact or specially designed pulley shafts, such as those without an extended shaft body structure, the strain gauge cannot be attached to the pulley shaft, i.e. cannot directly and accurately measure the torque value of the pulley shaft. CONTENT OF THE UTILITY MODEL

[0003] To solve the above technical problems, the present application provides a ring-shaped strain gauge for measuring torque, comprising: a main body, a sensitive grid and a wiring contact point; the main body is a closed circular ring, the sensitive grid is arranged in a non-closed circular shape on the front surface of the main body, and the sensitive grid is provided with a wiring contact point at the end point; the sensitive grid is used for measuring the torque of the pulley shaft, and the wiring contact point is used for electrically connecting the ring-shaped strain gauge with a wireless radio transmission module through a lead wire.

[0004] Optionally, the sensitive grid is composed of a plurality of non-closed concentric metal foils, and the plurality of metal foils are connected in parallel at the end point.

[0005] Optionally, the front surface of the main body is provided with a micro-groove, and the sensitive grid is adaptively installed in the micro-groove.

[0006] Optionally, the size of the ring-shaped strain gauge is adapted to the end surface of the pulley shaft.

[0007] Optionally, the back surface of the main body is provided with a mounting assembly, and the mounting assembly is used for fixedly mounting the ring-shaped strain gauge on the end surface of the pulley shaft.

[0008] Optionally, the mounting assembly comprises at least one of a suction cup, an adhesive layer or a mechanical locking device.

[0009] Optionally, the front surface of the main body is further covered with a protective cover, and the protective cover is used for preventing the sensitive grid from being damaged.

[0010] From the above technical solution, it can be seen that the present application has the following advantages:

[0011] The application provides a ring-shaped strain gauge for measuring torque, comprising a main body, a sensitive grid and a wiring contact point; the main body is a closed circular ring, the sensitive grid is arranged on the front surface of the main body in a non-closed circular shape, and the wiring contact point is arranged at the end point of the sensitive grid; the sensitive grid is used for measuring the torque of a pulley shaft, and the wiring contact point is used for electrically connecting the ring-shaped strain gauge with a wireless radio transmitting module through a lead wire. The strain gauge is arranged in a circular shape, can be mounted on the end surface of the pulley shaft without an extension shaft body, is suitable for the pulley shaft in a small space, improves the space utilization rate, and is simple and convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 An embodiment structure schematic diagram of the ring-shaped strain gauge for measuring torque provided by the application is provided. DETAILED DESCRIPTION

[0013] In order to solve the above technical problems, the application provides a ring-shaped strain gauge for measuring torque, which is used for measuring the torque of a pulley shaft.

[0014] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to illustrate the relative positional relationship between the components or constituent parts, and do not particularly limit the specific mounting orientation of the components or constituent parts.

[0015] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the application can be understood according to the specific situation.

[0016] In addition, the terms "mounting", "arrangement", "provided with", "connection", "connected" should be understood in a broad sense. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or constituent parts. For those skilled in the art, the specific meaning of the above-mentioned terms in the application can be understood according to the specific situation.

[0017] In addition, the structure, proportion, size and the like drawn in the drawings attached in the present application are only used for matching the disclosed content in the specification, for the understanding and reading of the person skilled in the art, and do not have technical substantial significance, and any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect and the purpose that can be achieved by the present application, still falls within the scope of the technical content disclosed by the present application.

[0018] The technical solutions in the present application will be described clearly and completely in the present application combined with the drawings attached in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the present application.

[0019] Please refer to Figure 1 The present application provides a ring-shaped strain gauge for measuring torque, which comprises a main body 01, a sensitive grid 02 and a wiring contact 03; the main body 01 is a closed circular ring, the sensitive grid 02 is arranged on the front surface of the main body 01 in a non-closed circular shape, and the wiring contact 03 is arranged at the end point of the sensitive grid 02; the sensitive grid 02 is used for measuring the torque of a pulley shaft 04, and the wiring contact 03 is used for electrically connecting the ring-shaped strain gauge with a radio transmission module through a lead wire.

[0020] First, the components in the embodiment will be introduced as follows:

[0021] Main body 01: the base layer of the ring-shaped strain gauge, which is made of high-strength and low-creep alloy material to improve the long-term stability of the strain gauge.

[0022] Sensitive grid 02: made of ultra-fine metal foil by high-precision photolithography technology to improve the sensitivity and accuracy of strain detection. The sensitive grid 02 needs to form an electric bridge during measurement, so the sensitive grid 02 in the ring-shaped strain gauge is designed in a non-closed circular shape and is adapted in size to the circular ring-shaped main body 01.

[0023] Wiring contact 03: the sensitive grid 02 is connected with a lead wire through the wiring contact 03, and then is electrically connected with a radio transmission module through the lead wire. The combination of the wiring contact 03 and the lead wire can transmit the data variation signal generated by the change of the sensitive grid 02 to the radio transmission module, and then the radio transmission module further sends the signal to an external radio receiving module, so as to transmit the signal to the subsequent signal and data processing system.

[0024] In this embodiment, the main body 01 is a closed circular ring, and the sensitive grid 02 is arranged in a non-closed circular shape on the front surface of the main body 01, and the end points of the sensitive grid 02 are provided with wire connection contacts 03; the sensitive grid 02 is used to measure the torque of the pulley shaft 04, and the wire connection contacts 03 are used to electrically connect the ring-shaped strain gauge with the radio transmission module through a lead. The strain gauge is arranged in a circular shape, which can be installed on the end surface of the pulley shaft 04 without an extension shaft body, so as to adapt to the pulley shaft 04 in a small space, improve the space utilization rate, and the ring-shaped strain gauge is easy to install.

[0025] In an optional embodiment, the sensitive grid 02 is composed of a plurality of non-closed concentric metal foils, and the plurality of metal foils are connected in parallel at the end points.

[0026] In this optional embodiment, the sensitive grid 02 is a key part of the ring-shaped strain gauge, which is bent into a plurality of non-closed concentric circles by a metal foil with a high resistance coefficient. The sensitive grid 02 is a resistance element responsible for sensing the strain of the member and converting it into a resistance change, so that the torque change can be known from the resistance change. The sensitive grid 02 is connected at the respective end points by a parallel process, which ensures that each sensitive grid 02 can respond uniformly and sensitively to deformation when subjected to torque, thereby accurately converting the torque change into an electrical signal output.

[0027] In an optional embodiment, the front surface of the main body 01 is provided with a micro-groove, and the sensitive grid 02 is adaptively installed in the micro-groove.

[0028] In this optional embodiment, the micro-groove is used to improve the adhesion strength and strain transmission efficiency of the sensitive grid 02 and the main body 01. The size and shape of the micro-groove are adapted to the sensitive grid 02, which ensures that the sensitive grid 02 can be stably and accurately installed in the groove, effectively avoiding misplacement and looseness during installation, and improving the stability and accuracy of measurement.

[0029] In an optional embodiment, the size of the ring-shaped strain gauge is adapted to the end surface of the pulley shaft 04.

[0030] In an optional embodiment, the back surface of the main body 01 is provided with a mounting assembly for fixedly installing the ring-shaped strain gauge on the end surface of the pulley shaft 04.

[0031] In an optional embodiment, the mounting assembly includes at least one of a suction cup, an adhesive layer, or a mechanical locking device.

[0032] In the above three optional embodiments, the outer diameter, inner diameter and thickness of the ring-shaped strain gauge are all adapted to the end face of the pulley shaft 04 to be measured. This design not only facilitates installation, but also ensures that the ring-shaped strain gauge maintains close contact with the pulley shaft 04 during measurement, thereby improving the efficiency of torque transmission and the accuracy of measurement. In order to further simplify the installation process and ensure the stable installation of the ring-shaped strain gauge, various optional mounting assemblies are designed on the back of the main body 01 of the ring-shaped strain gauge. These mounting assemblies include but are not limited to suction cups, adhesive layers, and mechanical locking devices.

[0033] In an optional embodiment, the front surface of the main body 01 is also covered with a protective cover to prevent damage to the sensitive grid 02.

[0034] In this optional embodiment, in order to effectively protect the sensitive grid 02 from erosion and mechanical damage from the external environment, a protective cover with high transparency and high wear resistance is also covered on the front surface of the main body 01 of the ring-shaped strain gauge. This protective cover not only effectively isolates harmful substances such as dust and moisture from eroding the sensitive grid 02, but also to some extent, resists mechanical impact and friction, ensuring that the sensitive grid 02 can maintain good working condition and measurement accuracy in various environments.

[0035] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ring strain gauge for measuring torque, characterized in that: include: The main body comprises a sensitive grid and wiring contacts; the main body is in a closed circular shape, the sensitive grid is arranged in a non-closed circular shape on the front of the main body, and wiring contacts are provided at the end points of the sensitive grid; the sensitive grid is used to measure the torque of the pulley shaft, and the wiring contacts are used to electrically connect the annular strain gauge to the radio transmission module through leads.

2. The annular strain gauge for measuring torque according to claim 1, characterized in that: The sensitive grid is composed of a plurality of non-closed concentric metal foils, and the plurality of metal foils are connected in parallel at end points.

3. The annular strain gauge for measuring torque according to claim 1, characterized in that: A micro groove is provided on the front side of the main body, and the sensitive grid is adaptively installed in the micro groove.

4. The annular strain gauge for measuring torque according to claim 1, characterized in that: The size of the annular strain gauge is adapted to the end face of the pulley shaft.

5. The annular strain gauge for measuring torque according to claim 4, characterized in that: A mounting assembly is provided on the back side of the main body, and the mounting assembly is used to fix the annular strain gauge on the end face of the pulley shaft.

6. The annular strain gauge for measuring torque according to claim 5, characterized in that: The mounting assembly includes at least one of a suction cup, an adhesive layer, or a mechanical locking device.

7. The annular strain gauge for measuring torque according to any one of claims 1 to 6, characterized in that: The front side of the main body is also covered with a protective cover, and the protective cover is used to prevent the sensitive grid from being damaged.

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