Dynamic torque sensor

Abstract

The utility model belongs to the technical field of torque sensors, in particular to a dynamic torque sensor, which comprises a packaging shell and a rotating shaft rotationally connected in the packaging shell through a bearing, an inductor is arranged in the packaging shell, and a magnetic conductor is arranged on the rotating shaft at a position opposite to the inductor. A strain bridge used for fixedly installing a strain gauge is arranged on the rotating shaft and located outside the packaging shell, the output end of the strain gauge is electrically connected with a Bluetooth module arranged on the rotating shaft, and the magnetic conductor is connected with the strain gauge. The non-contact type torque sensor is simple in structure and low in manufacturing cost, has the advantages of being capable of reliably, safely and effectively outputting the collected torque value dynamically in real time, is not prone to being interfered when collecting and outputting the torque value, and has the advantages of being simple in structure, convenient to use and high in reliability compared with an existing non-contact type torque sensor. The torque detection requirements of high-speed operation and extremely high precision requirements are met more easily, the detection value is more accurate, the response speed is higher, and maintenance is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of torque sensors, in particular to a dynamic torque sensor. Background Art

[0002] As a precision measuring instrument, dynamic torque sensors are widely used in industrial production, scientific research, and daily life. With the continuous advancement of technology, non-contact dynamic torque sensors, due to their high precision, high reliability, and long life, have gradually occupied a significant position in the market, and have stable growth potential and broad development space.

[0003] However, current dynamic torque sensors mainly use mutual inductance coils to achieve power supply, but this method has very high requirements for the coaxiality of the shaft during rotation. Otherwise, unstable power supply may easily lead to inaccurate detection values. Therefore, the main way to solve this problem is still to improve process accuracy, but this will undoubtedly greatly increase the cost of production and manufacturing, and due to the current level of machining, it is actually difficult to achieve satisfactory results. Another solution is to use compensation algorithms, but both the final measurement results and the real-time performance of data transmission are difficult to guarantee, making it difficult to cope with some scenarios with extremely high precision requirements.

[0004] In addition, for some scenarios that require real-time measurement and calculation of torque, the detected torque value needs to be output in a timely manner. However, in actual application scenarios, there may be large electromagnetic interference, especially in places with busy communications. This makes it very easy to be interfered with when detecting torque at ultra-high speeds, thereby affecting the dynamic output of the detection value. As a result, the scope of application of current dynamic torque sensors is still limited.

[0005] In order to meet the needs of current advanced technology development, the present application proposes a dynamic torque sensor that can accurately output torque values ​​under high speed conditions. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the present invention provides a dynamic torque sensor, which solves the problem that the current non-contact torque sensor is difficult to meet the torque detection needs of high-speed operation and extremely high precision requirements.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a dynamic torque sensor, comprising a packaging shell and a rotating shaft rotatably connected to the packaging shell through a bearing, an inductor is provided in the packaging shell, a magnetic conductor is provided at a position relative to the inductor on the rotating shaft, a strain bridge for fixing a strain gauge is provided on the rotating shaft and located outside the packaging shell, the output end of the strain gauge is electrically connected to a Bluetooth module provided on the rotating shaft, and the magnetic conductor is connected to the strain gauge.

[0008] Preferably, the strain bridge is cross-shaped.

[0009] Preferably, the strain bridge is in a plate shape.

[0010] Preferably, a notch is provided on the edge of the strain bridge.

[0011] Preferably, it further comprises an inner shell sleeved on the rotating shaft, and the Bluetooth module and the bearing are both arranged on the inner shell.

[0012] Preferably, the Bluetooth module supports communication frequency bands of 2.4 GHz and 5 GHz.

[0013] Preferably, an interface assembly is provided on the packaging shell.

[0014] Preferably, the interface assembly further includes a communication interface, and a receiving module communicatively connected to the Bluetooth module is further provided in the packaging shell.

[0015] Compared with the prior art, the present invention provides a dynamic torque sensor with the following beneficial effects:

[0016] This dynamic torque sensor has a simple structure and low production cost. It can output the collected torque values ​​dynamically and in real time reliably, safely and effectively. It is not easily interfered with when collecting and outputting torque values. Compared with current non-contact torque sensors, it is easier to meet the torque detection needs of high-speed operation and extremely high precision requirements. In addition, the detection values ​​are more accurate, the response speed is faster, and it is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the assembled three-dimensional structure of the dynamic torque sensor;

[0018] Figure 2 This is the structural front view of the dynamic torque sensor;

[0019] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the rotating shaft in this dynamic torque sensor.

[0021] In the figure: 1. Package shell; 2. Bearing; 3. Rotating shaft; 4. Inductor; 5. Magnetic conductor; 6. Bluetooth module; 7. Strain gauge bridge; 8. Notch; 9. Inner shell; 10. Interface assembly; 11. Receiver module. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1:

[0024] See also Figure 1-4 The present invention provides the following technical solution: a dynamic torque sensor, comprising a housing 1 and a rotating shaft 3 rotatably connected to the housing 1 via a bearing 2, an inductor 4 being provided in the housing 1, a magnetic conductor 5 being provided on the rotating shaft 3 at a position relative to the inductor 4, a strain bridge 7 for fixing a strain gauge on the rotating shaft 3 and located outside the housing 1, the output end of the strain gauge being electrically connected to a Bluetooth module 6 provided on the rotating shaft 3, the magnetic conductor 5 being connected to the strain gauge, and the Bluetooth module 6 supporting communication frequency bands of 2.4 GHz and 5 GHz;

[0025] The strain bridge 7 is plate-shaped, with a notch 8 provided on the edge thereof. The strain bridge 7 further includes an inner shell 9 sleeved on the rotating shaft 3 , and the Bluetooth module 6 and the bearing 2 are both provided on the inner shell 9 .

[0026] As an optional embodiment of the present invention, the rotating shaft 3 is used to connect to the measured shaft, and the sleeve is used to be fixed to a non-rotating component outside the measured shaft, or a component that does not rotate synchronously with the measured shaft. When the measured shaft rotates, electromagnetic induction is generated between the rotating shaft 3 and the sleeve, thereby energizing the strain gauge, thereby detecting the real-time torque of the rotating shaft 3 when rotating, and then outputting the real-time torque value through the Bluetooth module 6.

[0027] During the entire detection process, since the sleeve and the shaft 3 are rotationally connected, and the electromagnetic induction method is brushless compared to the mutual induction coil, there will be no significant wear, which minimizes the wear between the shaft 3 and the sleeve. No coaxiality is required, so the current is more stable, ensuring that the detected torque value is accurate. Of course, the machining accuracy requirement is not so important, which can save a lot of manufacturing costs. Moreover, this can be assembled as a "permanent component" in industrial equipment or automobiles and other scenarios, with a long service life.

[0028] Since the Bluetooth module 6 is used, the Bluetooth communication method generally supports data transmission in the ultra-high frequency (UHF) band. The dynamic data source generated under the condition of high-speed rotation of the shaft 3 is relatively large, so the Bluetooth communication method can well solve this problem and ensure the real-time nature of the data. At the same time, the Bluetooth technology itself can also ensure the validity and security of the data by optimizing the data packet size, adopting frequency hopping spread spectrum technology, strengthening encryption and authentication, introducing confirmation and retransmission mechanisms, and improving transmission power and antenna gain, and has strong data transmission efficiency.

[0029] In addition, since torque sensors are usually installed between the power source and the load, the strain gauge in this technical solution is installed outside the two bearings 2. This allows the strain gauge to more directly sense the strain changes caused by the torque when the measured shaft is deformed, avoiding the influence of intermediate links such as the packaging shell 1 on torque transmission and measurement, reducing the source of error, and having a fast response speed, thereby measuring the torque value more accurately. During maintenance, there is no need to remove the entire packaging shell 1, which is easy to maintain.

[0030] Through the above structure, a torque sensor with a simple structure and low production cost is constructed. It has the characteristics of being able to output the collected torque values ​​dynamically and in real time reliably, safely and effectively, and is not easily interfered with when collecting and outputting torque values. Compared with the current non-contact torque sensors, it is easier to meet the torque detection needs of high-speed operation and extremely high precision requirements, and the detection values ​​are more accurate, the response speed is faster, and it is easy to maintain.

[0031] like Figure 1-3 As shown, the packaging shell 1 is provided with an interface assembly 10, including a power interface and a communication interface. A receiving module is also provided in the packaging shell 1 for communication connection with the Bluetooth module 6.

[0032] As an optional implementation scheme of the present invention, when there are many interference environments in the application environment, or the location of the application scene is constantly changing, the receiving module can be directly set on the torque sensor to reduce the data transmission distance, ensure the reliability, stability and efficiency of data transmission, and provide a physical interface for external bandwidth access, wireless connection, etc. Therefore, the torque sensor has expandable capabilities and a wider range of applications.

[0033] Example 2:

[0034] like Figure 4 As shown, compared with embodiment 1, the difference is that the strain bridge 7 is cross-shaped.

[0035] As an optional implementation scheme of the present invention, the strength of the strain bridge 7 is made higher, and it is suitable for detection applications with greater power.

[0036] The working principle and usage process of the present invention are as follows: when the measured shaft rotates, electromagnetic induction is generated between the rotating shaft 3 and the sleeve, so that the strain gauge is energized, thereby being able to detect the real-time torque when the rotating shaft 3 rotates, and then output the real-time torque value through the Bluetooth module 6.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dynamic torque sensor comprising an enclosure and a shaft rotatably connected to the enclosure via a bearing, an inductor disposed within the enclosure, and a magnetic conductor disposed on the shaft at a position opposite the inductor, characterized in that: A strain bridge for fixing a strain gauge is provided on the rotating shaft and outside the packaging shell. The output end of the strain gauge is electrically connected to a Bluetooth module provided on the rotating shaft. The magnetic conductor is connected to the strain gauge.

2. The dynamic torque sensor according to claim 1, characterized in that The strain bridge is cross-shaped.

3. The dynamic torque sensor according to claim 1, characterized in that The strain bridge is in a plate shape.

4. The dynamic torque sensor according to any one of claims 2 to 3, characterized in that: The edge of the strain bridge is provided with a notch.

5. The dynamic torque sensor according to claim 4, characterized in that It also includes an inner shell sleeved on the rotating shaft, and the Bluetooth module and the bearing are both arranged on the inner shell.

6. The dynamic torque sensor according to claim 1, characterized in that The Bluetooth module supports the communication frequency bands of 2.4GHz and 5GHz.

7. The dynamic torque sensor according to claim 1, characterized in that The packaging shell is provided with an interface assembly, including a power interface.

8. The dynamic torque sensor according to claim 7, characterized in that: The interface assembly also includes a communication interface, and a receiving module that is communicatively connected to the Bluetooth module is also provided in the packaging shell.

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