Torque testing device

Abstract

The invention discloses a torque testing device, and relates to the technical field of pressure testing. The transmission assembly is rotationally arranged on the base; the test main body is connected with the transmission assembly, synchronously rotates along with the transmission assembly and is used for mounting equipment to be tested; the angle detector is arranged on the transmission assembly and is used for detecting the rotation angle of the test main body; the torque sensor is arranged on the transmission assembly and is used for detecting a torque value generated from the gravity center of the equipment to be tested to the rotation axis of the transmission assembly under the rotation angle; and the angle detector and the torque sensor are both in communication connection with the control assembly. According to the technical scheme, the measuring precision of an existing testing tool is improved.

Description

Technical Field

[0001] This invention relates to the field of pressure testing technology for head-mounted devices, and more particularly to a torque testing device. Background Technology

[0002] With the advancement of technology, VR, AR, MR, and other smart head-mounted devices have become an indispensable part of people's daily lives and have been widely adopted. The pressure on the neck caused by prolonged wear of these devices has gradually attracted attention. Excessive neck pressure not only affects the user's wearing experience but may also adversely affect neck health. Therefore, neck pressure testing has become a crucial aspect of improving device comfort during the design of smart head-mounted devices. Currently, pressure sensors are typically used to detect the pressure exerted on the neck by the head-mounted device at different head tilt angles. However, this method is complex to operate manually and negatively impacts measurement accuracy. Summary of the Invention

[0003] The main objective of this invention is to provide a torque testing device for use in torque testing of head-mounted devices, aiming to improve the measurement accuracy of existing testing tools.

[0004] To achieve the above objectives, embodiments of the present invention provide a torque testing device, the torque testing device comprising:

[0005] Base;

[0006] The transmission assembly is rotatably mounted on the base;

[0007] The test body is connected to the transmission assembly and rotates synchronously with the transmission assembly to mount the device to be tested;

[0008] An angle detector is installed on the transmission assembly to detect the rotation angle of the test body;

[0009] A torque sensor, disposed in the transmission assembly, is used to detect the torque value generated from the center of gravity of the device under test to the rotation axis of the transmission assembly at the rotation angle; and

[0010] The control component, the angle detector and the torque sensor are both communicatively connected to the control component.

[0011] In one embodiment, the angle detector includes:

[0012] A fixed bracket is provided on the base; and

[0013] A rotary encoder is rotatably mounted on the fixed bracket, and the rotary encoder and the transmission assembly are coaxially connected and rotate synchronously.

[0014] In one embodiment, the transmission assembly includes:

[0015] A drive shaft is rotatably mounted on the base; the test body is connected to the drive shaft and rotates synchronously; the torque sensor is mounted on the drive shaft.

[0016] A coupling that connects the drive shaft and the input shaft of the rotary encoder.

[0017] In one embodiment, the torque testing device further includes a distance adjustment structure that connects the test body and the transmission assembly, making the shortest distance from the center of gravity of the device under test to the rotation axis of the transmission assembly adjustable.

[0018] In one embodiment, the distance adjustment structure includes:

[0019] The mounting base is connected to the transmission assembly and rotates synchronously with it.

[0020] A support rod, one end of which is connected to the mounting base, and the other end of which extends in a direction away from the rotation axis of the transmission assembly; and

[0021] An insert is disposed inside the test body, and the insert and the support rod are slidably connected.

[0022] In one embodiment, the distance adjustment structure further includes a positioning unit, which includes a positioning groove and an elastic positioning protrusion. The positioning groove is provided at multiple intervals along the sliding direction of the insert, and the elastic positioning protrusion engages with the positioning groove. One of the elastic positioning protrusion and the positioning groove is located on the support rod, and the other of the elastic positioning protrusion and the positioning groove is located on the insert.

[0023] And / or, the distance adjustment structure further includes a locking member, which is threadedly connected to the insert, such that the end of the locking member abuts against or moves away from the support rod.

[0024] In one embodiment, the torque testing device further includes a speed reducer disposed on the base and drivenly connected to the transmission assembly.

[0025] In one embodiment, the speed reducer includes:

[0026] A housing is provided on the base, and an installation cavity is formed inside the housing;

[0027] A turbine, disposed in the mounting cavity, is coaxially connected to and rotates synchronously with the transmission assembly; and

[0028] A worm gear is disposed in the mounting cavity, and the worm gear is connected to the turbine drive.

[0029] In one embodiment, the torque testing device further includes an operating knob located outside the housing and connected to the worm gear drive.

[0030] In one embodiment, the controller integrates a wireless communication module, and the controller is wirelessly connected to the host computer through the wireless communication module.

[0031] The technical solution of this application involves fixing the test subject to a rotatable transmission component on the base, allowing the test subject to rotate synchronously with the transmission component. A head-mounted device is installed on the test subject and rotates synchronously with it. The test subject serves as the user's head; as it rotates synchronously with the transmission component, it simulates the user's head tilt angle, thus providing information on the pressure exerted on the cervical spine by the head-mounted device at different tilt angles. Simultaneously, a torque sensor is connected to the transmission component to collect or detect the torque value generated from the center of gravity of the head-mounted device to the rotation axis of the transmission component when the test subject rotates to a predetermined angle. Furthermore, an angle detector is connected to the transmission component to automatically detect the rotation angle of the test subject. Compared to manually comparing angles using an angle dial, this method is simpler, avoids human error in the collected angle data, and provides more standardized and accurate values, thereby improving the precision of the test data. In this application, both the angle detector and the torque sensor are communicatively connected to the control component, enabling automatic measurement and output of angle and torque. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of an embodiment of the torque testing device of the present invention;

[0034] Figure 2 This is a partial structural schematic diagram of an embodiment of the torque testing device of the present invention, wherein the main testing body has been hidden;

[0035] Figure 3 for Figure 2 A schematic diagram of the explosion structure.

[0036] Explanation of icon numbers:

[0037] 100. Base; 200. Transmission assembly; 210. Drive shaft; 220. Coupling; 230. Connecting shaft; 300. Test body; 400. Angle detector; 410. Fixed bracket; 420. Rotary encoder; 500. Torque sensor; 600. Control assembly; 700. Distance adjustment structure; 710. Mounting base; 720. Support rod; 730. Embedded part; 740. Positioning unit; 750. Locking part; 751. Locking screw; 752. Locking nut; 800. Reducer; 900. Operating knob.

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, in the embodiments of this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the embodiments of this invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0043] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the embodiments of the present invention.

[0044] With the increasing popularity of smart head-mounted devices, the pressure on the neck during prolonged wear has become a growing concern. Excessive neck pressure not only affects the user's wearing experience but may also negatively impact neck health. Therefore, testing neck pressure is a crucial aspect of improving device comfort during the design of smart head-mounted devices. Currently, a goniometer is typically used to measure the pitch angle of the smart head-mounted device, and then a pressure sensor monitors the torque value exerted on the neck at that pitch angle. However, manually measuring the pitch angle with a goniometer results in significant errors, which are exacerbated by different operators, leading to inaccurate data that does not reflect actual user experience and negatively impacts the wearing experience.

[0045] In view of this, embodiments of the present invention provide a torque testing device that can automatically detect the rotation angle of the test subject using an angle detector. Compared to manually comparing angles using an angle dial, the test is simpler, the collected angle data avoids human error, the standard is more uniform, and the values ​​are more accurate, thereby improving the precision of the test data. In this application, the angle detector and torque sensor are both communicatively connected to the control component, enabling automatic measurement and output of angle and torque.

[0046] To better understand the above technical solution, the following detailed explanation is provided in conjunction with the accompanying drawings.

[0047] like Figures 1 to 3 As shown, this embodiment of the invention proposes a torque testing device for detecting the torque exerted by a smart head-mounted device on a user's neck, i.e., the pressure exerted on the user's cervical spine. Optionally, the head-mounted device includes, but is not limited to, smart glasses (AR), VR, headphones, smart helmets, and other products worn on the head with weight requirements; these are not limited here. The torque testing device includes:

[0048] The base 100 provides an installation location to facilitate the assembly of other components in the torque testing device. Optionally, the base 100 may be a flat plate structure and may be made of metal or plastic; no limitation is made herein.

[0049] The transmission assembly 200 is rotatably mounted on the base 100. It is understood that the transmission assembly 200 is rotatably connected to the base 100 and can rotate relative to the base 100 under external force. Optionally, the transmission assembly 200 can be a transmission rod, with bearings at both ends, the transmission rod being rotatably connected to the bearings, and the bearings being fixed to the base 100.

[0050] The test body 300, connected to and rotating synchronously with the transmission component 200, is used to mount the device under test. It is understood that the test body 300 simulates a human head and can be configured as such. The smart head-mounted device is mounted on the test body 300 and rotates synchronously with it, thus simulating the tilt angle of the user's head and obtaining the pressure value on the user's cervical spine at different tilt angles. Optionally, the test body 300 and the transmission component 200 are detachably connected, allowing for easy replacement of different types of test bodies 300 to meet the needs of users in different countries or regions.

[0051] An angle detector 400, located in the transmission assembly 200, is used to detect the rotation angle of the test subject 300. It can be understood that the angle detector 400 can automatically detect the rotation angle of the test subject 300, that is, it can automatically obtain the pitch angle simulating the user's head. In other words, although the rotation is manual, the acquisition of the rotation angle, i.e., the pitch angle, is automatic. Compared to manual data collection, the values ​​are more accurate, thereby improving the accuracy of the test data and making the test results more consistent with the actual wearing situation of the user. Optionally, the angle detector 400 can be configured as a rotary encoder 420; of course, it can also be other devices capable of automatically detecting the rotation angle, and this is not limited here.

[0052] A torque sensor 500, located in the transmission assembly 200, is used to detect the torque value generated between the center of gravity of the device under test and the rotation axis of the transmission assembly 200 at a given rotation angle. It can be understood that the distance from the center of gravity of the smart head-mounted device to the rotation axis of the transmission assembly 200 is approximately equal to the distance from the center of gravity of the smart head-mounted device to the pressure point of the human cervical spine. The torque sensor 500 collects the torque value of the rotation axis of the transmission assembly 200, which represents the pressure force borne by the pressure point of the human cervical spine. Based on the test results, the pressure exerted by the smart head-mounted device on the human cervical spine can be determined. Furthermore, based on the torque force received by the torque sensor 500, a qualitative analysis of the pressure exerted by the smart head-mounted device on the user's neck can be performed, facilitating the detection of the degree of fatigue caused by the smart head-mounted device, especially to the neck, thereby improving the wearing comfort of the smart head-mounted device; and

[0053] The control component 600, angle detector 400, and torque sensor 500 are all communicatively connected to the control component 600. It is understood that the angle value detected by the angle detector 400 and the torque value detected by the torque sensor 500 can be transmitted to the control component 600, and then uploaded to a host computer or displayed through the control component 600. Optionally, the angle detector 400 and the torque sensor 500 can be connected and communicated via soldering, connectors, pins, etc., which is not limited here. In one embodiment, the control component 600 is a circuit board. In other embodiments, the control component 600 is mounted on the base 100 and can be fixed by bolts or adhesive, which is not limited here.

[0054] In this embodiment, a rotatable transmission component 200 is mounted on the base 100, and the test body 300 is fixed to the transmission component 200, allowing the test body 300 to rotate synchronously with the transmission component 200. The head-mounted device is installed on the test body 300 and rotates synchronously with it. The test body 300 can serve as the user's head. When the test body 300 rotates synchronously with the transmission component 200, it simulates the user's head tilt angle, thus allowing the determination of the pressure exerted by the head-mounted device on the cervical spine at different tilt angles. Simultaneously, a torque sensor 500 is connected to the transmission component 200, which can collect or detect the torque value generated between the center of gravity of the head-mounted device and the rotation axis of the transmission component 200 when the test body 300 rotates to a predetermined angle. Furthermore, an angle detector 400 is connected to the transmission component 200, which can automatically detect the rotation angle of the test body 300. Compared with manually comparing angles using an angle dial, the test is simpler, the collected angle data avoids human error, the standard is more uniform, and the values ​​are more accurate, thereby improving the precision of the test data. In this application, the angle detector 400 and the torque sensor 500 are both communicatively connected to the control component 600, enabling automatic measurement and output of angle and torque.

[0055] In one embodiment of the present invention, reference is made to... Figure 2 The angle detector 400 includes:

[0056] Fixed bracket 410, located on base 100; and

[0057] A rotary encoder 420 is rotatably mounted on a fixed bracket 410. The rotary encoder 420 and the transmission assembly 200 are coaxially connected and rotate synchronously.

[0058] Specifically, the angle detector 400 includes a fixed bracket 410 and a rotary encoder 420. The fixed bracket 410 is fixed to the base 100, and the rotary encoder 420 is mounted on the fixed bracket 410. The rotary encoder 420 has an input shaft, which is coaxially connected to the transmission assembly 200 and its rotation is restricted. This means the input shaft of the rotary encoder 420 can rotate synchronously with the transmission assembly 200, thereby acquiring the rotation angle of the test subject 300. In one embodiment, the rotary encoder 420 is fixed to the fixed bracket 410 by bolts. Optionally, three bolts are provided, arranged in a triangular pattern, which improves the stability of the fixation.

[0059] In one embodiment of the present invention, reference is made to... Figure 2 The transmission assembly 200 includes:

[0060] Drive shaft 210 is rotatably mounted on base 100. Test body 300 is connected to drive shaft 210 and rotates synchronously. Torque sensor 500 is mounted on drive shaft 210.

[0061] Coupling 220 connects drive shaft 210 and input shaft of rotary encoder 420.

[0062] Specifically, the transmission assembly 200 includes a drive shaft 210 and a coupling 220. The drive shaft 210 is rotatably mounted on the base 100 for mounting the test body 300 and the torque sensor 500. The coupling 220 connects the input shaft of the rotary encoder 420 to the drive shaft 210. It is understood that the coupling 220 absorbs overall tolerances and torsion, improving the accuracy of the equipment. In one embodiment, the transmission assembly 200 further includes a connecting shaft 230, which connects the input shaft of the rotary encoder 420 to the coupling 220. The connecting shaft 230 ensures interface matching between the input shaft of the rotary encoder 420 and the coupling 220, providing good rigidity and preventing excessive bending or deformation during transmission.

[0063] Optionally, the torque testing device also includes a mounting flange, a coupling 220 connecting the mounting flange and the connecting shaft 230, a torque sensor 500 mounted on the mounting flange, and the torque sensor 500 connected to the drive shaft 210, which can improve the fixation reliability of the torque sensor 500.

[0064] In one embodiment of the present invention, reference is made to... Figure 1 The torque testing device also includes a distance adjustment structure 700, which connects the test body 300 and the transmission component 200 so that the shortest distance from the center of gravity of the device under test to the rotation axis of the transmission component 200 is adjustable.

[0065] Specifically, the torque testing device also includes a distance adjustment structure 700, which connects the test body 300 and the transmission component 200. It can be understood that by using the distance adjustment structure 700, the distance between the test body 300 and the rotation axis of the transmission component 200 can be adjusted, thereby adjusting the shortest distance from the center of gravity of the device under test to the rotation axis of the transmission component 200. This allows for the simulation of the actual situation when different users wear the device under test, improving the accuracy of the test data. Optionally, the distance adjustment structure 700 can be an electric telescopic rod or other structures that can be raised, lowered, or retracted; this is not limited here.

[0066] In one embodiment of the present invention, reference is made to... Figure 2 The distance adjustment structure 700 includes:

[0067] Mounting base 710 is connected to and rotates synchronously with transmission assembly 200;

[0068] Support rod 720, one end of which is connected to mounting base 710, and the other end of which extends in a direction away from the rotation axis of transmission assembly 200; and

[0069] An insert 730 is located inside the test body 300, and the insert 730 and the support rod 720 are slidably connected.

[0070] Specifically, the distance adjustment structure 700 includes a mounting base 710, a support rod 720, and an insert 730. The mounting base 710 is fixedly connected to the transmission component 200. The support rod 720 is connected to the mounting base 710 and extends away from the rotation axis of the transmission component 200. The insert 730 is connected to the test body 300 and is disposed inside the test body 300. This ensures that the shortest distance from the center of gravity of the device under test to the rotation axis of the transmission component 200 is approximately equal to the horizontal distance from the center of gravity of the smart head-mounted device to the cervical spine during actual wear. The insert 730 and the support rod 720 are slidably connected, allowing them to move away from or towards the mounting base 710. This adjusts the distance from the test body 300 to the rotation axis of the transmission component 200, thus obtaining test data on the pressure exerted on the user's neck by the smart head-mounted device at different distances, better adapting to users with different neck lengths. Moreover, the sliding connection simplifies the structure, reduces the overall complexity of the device, and lowers development costs.

[0071] In one embodiment of the present invention, reference is made to... Figure 2The distance adjustment structure 700 also includes a positioning unit 740, which includes positioning grooves and elastic positioning protrusions. Multiple positioning grooves are spaced apart along the sliding direction of the insert 730, and the elastic positioning protrusions engage with the positioning grooves. One of the elastic positioning protrusions and positioning grooves is located on the support rod 720, and the other is located on the insert 730. It is understood that, through the positioning grooves and elastic positioning protrusions, during the sliding of the insert 730, the elastic positioning part will produce a "clicking" sound when switching between two adjacent positioning grooves, providing a tactile feedback to the operator. Moreover, each sound indicates an adjustment of the predetermined distance, allowing the operator to easily perceive the degree of distance adjustment and improving operational convenience. In one embodiment, the distance between two adjacent positioning grooves can be 1 cm, 3 cm, or 5 cm, and can be optimally selected according to actual usage requirements; no limitation is made here. Optionally, the elastic positioning protrusion can be a spring, a glass ball spring, or a rubber protrusion; no limitation is made here.

[0072] And / or, refer to Figure 3The distance adjustment structure 700 also includes a locking member 750, which is threadedly connected to the insert 730, such that the end of the locking member 750 abuts against or moves away from the support rod 720. The locking member 750 can lock the test body 300 and the support rod 720, thereby fixing the test body 300 at a predetermined distance and preventing it from sliding freely and affecting the test structure; alternatively, it can unlock the test body 300 and the support rod 720, allowing the insert 730 to slide and thus adjust the shortest distance between the test body 300 and the rotation axis of the transmission assembly 200. Optionally, the locking member 750 is a bolt. Understandably, by rotating the bolt, the head of the bolt can be pressed against the support rod 720, thereby locking the test body 300 and the support rod 720, and the insert 730 cannot slide; when the head of the bolt separates from the support rod 720, the test body 300 and the support rod 720 are unlocked, and the insert 730 can slide relative to the support rod 720, thereby adjusting the shortest distance of the rotation axis from the test body 300 to the transmission assembly 200. In one embodiment, the locking member 750 includes a locking screw 751 and a locking nut 752. The locking screw 751 is threadedly connected to the insert 730 or the test body 300. The insert 730 has a mounting groove, and the locking nut 752 is slidably disposed in the mounting groove and its rotation is restricted. One end of the locking screw 751 passes through the support rod 720 and is connected to the locking nut 752. By rotating the locking screw 751, the locking nut 752 slides in the mounting groove, thereby pressing against the support rod 720 or separating from the support rod 720, thereby locking or unlocking the insert 730 and the support rod 720. In this embodiment, the insert 730 is slidably sleeved on the outside of the support rod 720. Optionally, the support rod 720 has a clearance hole that extends along the sliding direction of the insert 730, and the locking screw 751 passes through the clearance hole. As an alternative, the nut can be a T-nut, a square nut, or other nut type that allows it to be immobilized in the mounting slot; no limitation is made here.

[0073] In one embodiment of the present invention, reference is made to... Figures 1 to 3 The torque testing device also includes a reducer 800, which is mounted on the base 100 and driven by the transmission assembly 200. The reducer 800 reduces the external driving force, facilitating precise control of the rotation angle of the transmission assembly 200.

[0074] In one embodiment of the present invention, the reducer 800 includes:

[0075] The housing is located on the base 100, and the interior of the housing forms an installation cavity;

[0076] A turbine, located in the mounting cavity, is coaxially connected to and rotates synchronously with the transmission assembly 200; and

[0077] The worm gear is located in the mounting cavity and is connected to the turbine drive.

[0078] Specifically, the reducer 800 includes a housing, a worm gear, and a worm shaft. The housing has an internal mounting cavity for mounting the worm gear and worm shaft, while also protecting them and improving safety. The worm gear and worm shaft work together to reduce speed and achieve one-way self-locking. Optionally, one end of the drive shaft 210 extends into the mounting cavity and connects to the worm gear, while one end of the worm gear extends outside the housing. By rotating the worm gear, the worm gear drives the drive shaft 210 to rotate. Because the worm gear transmission ratio is very large, a large-angle rotation of the worm gear only drives a small-angle rotation of the drive shaft 210, thus allowing precise control of the rotation angle of the drive shaft 210. In one embodiment, the housing can be fixed to the base 100 by adhesive or bolts; this is not limited to this embodiment.

[0079] In one embodiment of the present invention, reference is made to... Figures 1 to 3 The torque testing device also includes an operating knob 900, which is located on the outside of the housing and connected to the worm gear drive. The operating knob allows the operator to easily rotate the worm gear, thereby adjusting the rotation angle of the testing body 300.

[0080] In one embodiment of the present invention, the controller integrates a wireless communication module, which wirelessly connects the controller to the host computer. The wireless communication module enables automatic remote transmission of angle and torque measurements, as well as local storage of test data, solving the problem of inconvenient data reading and storage in existing torque testers and effectively improving testing efficiency. Optionally, the wireless communication module can be a wireless module, Bluetooth, or WiFi module; no limitation is made herein.

[0081] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the embodiments of the present invention. Any equivalent structural transformations made under the technical concept of the present invention using the description and drawings of the embodiments of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the embodiments of the present invention.

Claims

1. A torque testing device for testing a headgear torque, the torque testing device comprising: The torque testing device comprises: a base; a transmission assembly rotatably arranged on the base; a testing body connected with the transmission assembly and synchronously rotated with the transmission assembly, used for mounting a device to be tested; an angle detector arranged on the transmission assembly, used for detecting a rotation angle of the testing body; a torque sensor arranged on the transmission assembly, used for detecting a torque value generated by a center of gravity of the device to be tested to a rotation axis of the transmission assembly at the rotation angle; and a control assembly, the angle detector and the torque sensor being communicatively connected with the control assembly.

2. The torque testing device of claim 1, wherein, The angle detector comprises: a fixed support arranged on the base; and a rotary encoder rotatably arranged on the fixed support, the rotary encoder being coaxially connected with the transmission assembly and synchronously rotated with the transmission assembly.

3. The torque testing device of claim 2, wherein, The transmission assembly comprises: a transmission shaft rotatably arranged on the base, the testing body being connected with the transmission shaft and synchronously rotated with the transmission shaft, the torque sensor being arranged on the transmission shaft; and a coupling, the coupling connecting the transmission shaft and an input shaft of the rotary encoder.

4. The torque testing device of claim 1, wherein, The torque testing device further comprises a distance adjusting structure, the distance adjusting structure connecting the testing body and the transmission assembly so that a shortest distance from the center of gravity of the device to be tested to the rotation axis of the transmission assembly is adjustable.

5. The torque testing device of claim 4, wherein, The distance adjusting structure comprises: a mounting seat connected with the transmission assembly and synchronously rotated with the transmission assembly; a support rod, one end of the support rod being connected with the mounting seat, the other end of the support rod extending away from the rotation axis of the transmission assembly; and an inner insert arranged inside the testing body, the inner insert being slidably connected with the support rod.

6. The torque testing device of claim 5, wherein, The distance adjusting structure further comprises a positioning unit, the positioning unit comprising a positioning groove and an elastic positioning protrusion, a plurality of the positioning grooves being arranged along a sliding direction of the inner insert, the elastic positioning protrusion being engaged with the positioning groove; wherein one of the elastic positioning protrusion and the positioning groove is arranged on the support rod, the other of the elastic positioning protrusion and the positioning groove being arranged on the inner insert. Furthermore, the distance adjusting structure further comprises a locking member, the locking member being threadedly connected with the inner insert, such that an end of the locking member abuts against or is away from the support rod.

7. The torque testing device of claim 1, wherein, The torque testing device further comprises a speed reducer, the speed reducer being arranged on the base and drivingly connected with the transmission assembly.

8. The torque testing device of claim 7, wherein, The speed reducer comprises: a box arranged on the base, an installation cavity being formed inside the box; a turbine arranged in the installation cavity, the turbine being coaxially connected with the transmission assembly and synchronously rotated with the transmission assembly; and a worm arranged in the installation cavity, the worm being drivingly connected with the turbine.

9. The torque testing device of claim 8, wherein, The torque testing device further comprises an operation knob, the operation knob being arranged outside the box and drivingly connected with the worm.

10. The torque testing device of any one of claims 1 to 9, wherein, The controller is integrated with a wireless communication module, the controller being wirelessly connected with an upper computer through the wireless communication module.

Images