Mechanical tripping type digital display wrench capable of quickly setting torque and working method of mechanical tripping type digital display wrench

Abstract

The invention discloses a mechanical tripping type digital display wrench capable of rapidly setting torque and a working method of the mechanical tripping type digital display wrench, solves the problem that in the prior art, the torque in work cannot be monitored in real time, and has the beneficial effects that the torque control precision is guaranteed, and the working efficiency is improved. Comprising a wrench force arm, the wrench force arm is installed at one end in an extension rod and can rotate, a handle is arranged on the outer side of the other end of the extension rod and can rotate relative to the extension rod, the extension rod is hollow, and a torque presetting assembly is arranged in the extension rod; the torque preset assembly comprises a spring, the spring sleeves the annular direction of the positioning rod, the maximum length of the spring is larger than the length of the positioning rod, one end of the spring is connected with an encoder, the encoder is connected with a push rod, the push rod is connected with a handle, the handle drives the push rod to do linear motion and rotary motion in the rotating process, and the encoder is connected with a controller.

Description

Technical Field

[0001] This invention relates to the field of wrench technology, and in particular to a mechanically release digital display wrench with rapid torque setting and its working method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Among existing torque wrenches, traditional mechanical trip torque wrenches emit a trip alarm and produce a slippage sensation when the torque reaches the preset value, prompting the operator to stop working. These wrenches are highly efficient but have low precision and lack digital display functionality. Traditional digital torque wrenches have digital displays, but they often experience overload due to inertia during force application, and slow force application leads to reduced efficiency. During operation, it is necessary to obtain the desired torque to judge and record the work quality. Traditional mechanical trip torque wrenches can preset the torque but cannot upload the data; traditional digital torque wrenches typically require the desired torque to be preset in a host computer. When the desired torque changes, it needs to be reset in the host computer, reducing work efficiency and placing higher demands on the operator.

[0004] In summary, while existing torque wrenches can preset torque, they cannot monitor torque in real time during operation. Without real-time monitoring of the torque during operation, they rely solely on a tripping alarm sound. If the operator is not paying attention, the tightening operation can easily continue, resulting in poor quality control. Furthermore, existing torque wrenches cannot meet the comprehensive requirements of modern industrial production for torque control accuracy, ease of operation, data recording and transmission, and work efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a mechanically release digital display wrench that allows for rapid torque setting, while also providing a preset torque wrench with a mechanical slip feel, without altering the traditional mechanical torque adjustment method. Furthermore, the wrench can accurately upload the preset torque in real time.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A mechanically tripped digital wrench with quick torque setting includes a wrench arm, one end of which is mounted inside an extension rod and is rotatable relative to the extension rod. A handle is located on the outer side of the other end of the extension rod and is rotatable relative to the extension rod. The extension rod is hollow and contains a torque preset component. One end of the torque preset component is connected to the wrench arm via a tripping component. The torque preset component includes a spring that is circumferentially fitted onto a positioning rod. The maximum length of the spring is greater than the length of the positioning rod. One end of the spring is connected to an encoder, which is connected to a push rod. The push rod is connected to the handle. During rotation of the handle, the push rod is driven to perform linear and rotary motion. The encoder is connected to a controller, which is located inside a control box mounted on the extension rod. A strain sensor is also provided on the outer surface of the extension rod. The controller is separately connected to the strain sensor and an alarm component.

[0007] As described above, in a mechanically release digital wrench with a quick-setting torque, the strain sensor is connected to the controller and is located on the outer surface of the extension rod. The control box also includes an angle detection component, an alarm component, and a communication module, each of which is individually connected to the controller.

[0008] The alarm component includes a buzzer, a vibration motor, and an alarm light, and the alarm component is installed at the control box; As described above, a mechanically release digital wrench with a quickly set torque is provided, wherein the controller is connected to a control terminal.

[0009] As described above, in a mechanically release digital wrench with a quick-setting torque, one end of the spring is fixed to a spring positioning ring, which is in contact with the encoder. The spring positioning ring is hollow so that the positioning rod can pass through it. After the positioning rod passes through the spring positioning ring, it can trigger the reset button of the encoder.

[0010] As described above, in a mechanically release digital wrench with a quick torque setting, the end of the spring away from the encoder is connected to the release component via a spring top block, and one end of the positioning rod is connected to the spring top block; The tripping component includes a tripping positioning block, a tripping support, and a tripping block. The middle of the tripping positioning block has a protrusion facing the wrench arm. One end of the tripping support has a recess to cooperate with the protrusion of the tripping positioning block. The two sides of the protrusion of the tripping positioning block are in contact with the spring top block. The other end of the tripping support is movably arranged between the tripping block and the wrench arm.

[0011] As described above, a mechanically tripped digital wrench with a quick-setting torque includes an encoder housing and an encoder core. The encoder housing is located inside the extension rod and is movable relative to the extension rod. The encoder core passes through the encoder housing and is detachably connected to the push rod.

[0012] As described above, a mechanically release digital wrench with quick torque setting has a hollow handle. A first fixing block is located at the end of the extension rod furthest from the wrench arm. The push rod passes through the first fixing block and enters the handle. The handle and the first fixing block are connected by a threaded structure. A second fixing block is located inside the handle. The push rod passes through the second fixing block and can move linearly relative to the first fixing block. The second fixing block is connected to the handle via a threaded structure. Rotation of the handle causes the push rod to rotate through the second fixing block, and the push rod simultaneously moves linearly under the action of the first fixing block.

[0013] As described above, a mechanically release digital wrench with a quick torque setting mechanism has a positioning step inside the handle, which positions the second fixing block. A limiting step is provided on the outside of the handle, and the handle is detachably connected to the locking ring through the limiting step.

[0014] As described above, a mechanically release digital wrench with a quick-setting torque includes a control box comprising a lower control cover and a higher control cover, which are detachably connected. A display screen is provided on the upper control cover and is connected to the controller.

[0015] Secondly, the present invention also discloses a method for operating a mechanically release digital display wrench with rapidly set torque, comprising the following: The operator selects the preset torque according to the process requirements and rotates the handle. During the rotation of the handle, the angle information of the push rod is transmitted to the controller through the encoder. The controller converts the angle information into preset torque information based on the pulse data of the encoder. During the operation of the wrench lever arm, the strain sensor transmits the collected data to the controller, which then calculates the current torque value based on the data transmitted by the strain sensor. When the current torque value reaches the preset torque, the tripping component activates, and the controller sends a message to the alarm component to indicate that it is qualified.

[0016] The beneficial effects of the present invention are as follows: 1) The digital display wrench of this invention has a reasonable structure. An encoder is set between the spring and the push rod. Driven by the handle, the push rod can perform linear and rotary movements. The encoder can obtain the accurate value of the preset torque and send it to the controller. During the operation of the wrench, the strain sensor obtains the strain information at the extension rod and sends it to the controller. The controller can obtain the real-time torque of the wrench during operation and compare it with the preset torque value. If the two are the same, the controller can control the alarm to sound. At the same time, with the setting of the tripping component, the wrench arm rotates and produces a slipping feel. The double prompts are in place, improving the working efficiency and working accuracy of the digital display wrench.

[0017] 2) The digital display wrench provided in this invention has a real-time torque display function and a mechanical slip feel, with high tightening accuracy and work efficiency, ensuring traceability of work quality; the encoder realizes the digital measurement of preset torque, and the preset torque value can be quickly and accurately uploaded to the control terminal, realizing the real-time synchronization of the expected torque in the control terminal when switching work tasks, thus improving work efficiency.

[0018] 3) In this invention, the positioning rod passes through the spring positioning ring. After the positioning rod passes through the spring positioning ring, it can trigger the encoder's reset button. The positioning rod is set to locate the maximum preset torque value. After the positioning rod touches the encoder's reset button, the encoder is reset, and the preset torque can be reset.

[0019] 4) The push rod structure in this invention is reasonably set. By setting the first fixing block and the second fixing block, the push rod can achieve linear motion while rotating, thereby compressing the spring and driving the encoder to rotate to realize the digital measurement of the preset torque. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a front view of a mechanically release digital wrench for quick torque setting according to one or more embodiments of the present invention.

[0022] Figure 2 This is a top view of a mechanically release digital wrench for quickly setting torque according to one or more embodiments of the present invention.

[0023] Figure 3 This is an internal sectional view of a mechanically release digital wrench for quick torque setting according to one or more embodiments of the present invention.

[0024] Figure 4This is the present invention. Figure 3 A partial view at point I in the middle.

[0025] Figure 5 This is the present invention. Figure 3 A partial view at point II in the middle.

[0026] Figure 6 This is a schematic diagram of the working process of a mechanical release digital display wrench for quickly setting torque according to one or more embodiments of the present invention.

[0027] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0028] The components are: 1-wrench lever arm, 2-pin shaft, 3-extension rod, 4-control upper cover, 5-handle, 6-locking ring, 7-rear cover, 8-control lower cover, 9-display screen, 10-film, 11-button, 12-controller, 13-lithium battery, 14-second fixing block, 15-tripping bracket positioning block, 16-spring top block, 17-positioning rod, 18-spring, 19-spring positioning ring, 20-encoder inner core, 21-encoder housing, 22-push rod, 23-first fixing block, 24-strain sensor, 25-tripping block, 26-tripping bracket, 27-limiting step, 28-positioning step, 101-lever ratchet head knob, 102-lever ratchet head drive component. Detailed Implementation

[0029] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. As introduced in the background section, the existing technology has a single alarm method for wrenches, which leads to poor quality control. In order to solve the above technical problems, this invention proposes a mechanical release digital display wrench with quick torque setting.

[0031] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1As shown, a mechanically released digital wrench with quick torque setting includes a wrench arm 1, which is mounted on one end of an extension rod 3 via a pin 2. The pin 2 is perpendicular to the central axis of the extension rod 3, allowing the wrench arm 1 to rotate relative to the extension rod 3 along the central axis of the pin 2. A strain sensor 24 is installed on the extension rod 3, positioned at the center of the extension rod 3. The strain sensor 24 is a strain-type resistance sensor that changes resistance in response to the deformation of the extension rod 3. The strain sensor 24 is connected to a controller 12 to transmit the collected data to the controller, which calculates the current torque value based on the data transmitted by the strain sensor. The other end of the extension rod 3 is connected to a handle 5, which can rotate around the central axis of the extension rod 3. A control box is installed in the middle section of the extension rod 3. The control box is assembled from an upper control cover 4 and a lower control cover 8. The controller 12 is installed inside the control box. The strain sensor 24 is located inside the control box for easy wiring and to protect the strain sensor 24 from exposure. It should be noted that the end of the wrench lever arm 1 exposed above the extension rod 3 is provided with a lever arm ratchet head knob 101 and a lever arm ratchet head drive component 102. The lever arm ratchet head knob 101 is connected to the lever arm ratchet head drive component 102. The lever arm ratchet head knob 101 is used to lock the tightening direction, and the lever arm ratchet head drive component 102 is used to cooperate with the socket. Both the lever arm ratchet head knob 101 and the lever arm ratchet head drive component 102 are existing structural components.

[0032] It should be noted that the front of the control box is the upper control cover 4, and the back is the lower control cover 8. (See reference) Figure 2 As shown, the control cover 4 is equipped with a display screen 9 and a button 11. The display screen 9 is an LCD screen. The display screen 9 and the button 11 are covered with a protective and insulating film. The display screen 9 and the button 11 are both connected to the controller 12. The controller is turned on by the button 11. The controller 12 and a lithium battery are installed inside the control box. The lithium battery supplies power to the controller, encoder and strain gauge sensor.

[0033] It should be noted that the extension rod 3 has a torque preset component inside, see reference. Figure 3 and Figure 4As shown, the torque preset component includes a spring 18, a push rod 22, and a positioning rod 17 located inside the extension rod 3. The spring 18 is positioned circumferentially on the positioning rod 17. One end of the spring 18 is connected to the tripping component (including the tripping positioning block 15, the tripping block 25, and the tripping support 26) via a spring top block 16. One end of the positioning rod 17 is connected to the spring top block 16. The positioning rod 17 is configured to position the maximum preset torque value. The other end of the spring 18 is fixed to the spring positioning ring 19. The spring positioning ring 19 is a T-shaped structure that facilitates the positioning and installation of the spring 18. The wider side of the spring positioning ring 19 is connected to the encoder's encoding. The encoder housing 21 is connected to the encoder core 20, which is fixed to the encoder housing 21. The encoder is used to accurately measure and feedback rotational motion parameters to achieve precise torque control. The encoder core 20 is installed inside the encoder housing 21, which is located inside the handle 5. The other end of the encoder housing 21 away from the spring positioning ring 19 contacts the push rod 22. The encoder housing 21 is equipped with a reset button. When the spring 18 is compressed to the limit position, the positioning rod 17 passes through the spring positioning ring 19 and touches the encoder reset button to reset the encoder, allowing the preset torque to be reset.

[0034] Specifically, the encoder core 20 passes through the encoder housing 21 and is engaged with one end of the push rod 22. The encoder moves inside the extension rod 3 with the push rod 22, thereby compressing the spring 18 and gradually moving closer to the positioning rod 17. One end of the push rod 22 passes through the end of the extension rod and is placed in the handle 5. The handle 5 is provided with a positioning step 28, which positions the second fixing block 14. The second fixing block 14 is connected to the handle 5 by a threaded structure. The end of the extension rod 3 is fixedly provided with a first fixing block 23. The push rod 22 is supported by the first fixing block 23 and the second fixing block 14. The push rod 22 can move linearly relative to the first fixing block 23. The push rod 22 and the second fixing block 14 are connected by a spline, which allows the second fixing block 14 to drive the push rod 22 to rotate together without interfering with the linear movement of the push rod 22. Thus, during the rotation of the handle 5 relative to the extension rod 3, the second fixing block 14 drives the push rod 22 to rotate together, thereby driving the encoder to rotate by a set angle. The push rod and the first fixing block 23 are threadedly connected, allowing the push rod 22 to move linearly.

[0035] The encoder core 20 is mounted on one end of the push rod 22 and rotates together with the push rod 22. The encoder is connected to the controller. The encoder is an incremental encoder, which generates a pulse signal every time it rotates through a certain angle.

[0036] Specifically, push rod 22 is a T-shaped push rod. The wider side of push rod 22 is limited by the first fixing block 23, and the other end of push rod 22 is connected to the second fixing block 14. A protrusion is provided on the wider side of push rod 22, and a groove is provided on the encoder core 20. The protrusion of push rod is inserted into the groove of encoder core 20 to ensure a stable connection between push rod 22 and encoder core 20. The protrusion has a set length, and the length of the groove is greater than the length of the protrusion. In this way, after the push rod position is adjusted, the controller can obtain the current position torque information through the encoder.

[0037] The handle 5 is a hollow structure and is fitted onto the end of the extension rod 3. The handle 5 and the extension rod 3 are connected by a threaded structure. The handle 5 has a circumferential limiting step 27, which engages with the locking ring 6 to achieve a detachable connection. After the locking ring 6 disengages from the limiting step 27, the handle 5 can be rotated. After the locking ring 6 engages with the limiting step 27, the handle is locked, which locks the position of the push rod fixing block 14 relative to the extension rod 3, preventing the preset torque from changing due to the rotation of the handle 5 during the tightening of the wrench. In addition, there are scale lines marked on the handle along its length, and the bottom of the handle 5 has a back cover 7.

[0038] refer to Figure 5 As shown, the release positioning block 15 is a Z-shaped structural component. The middle of the release positioning block 15 has a protrusion facing the release support 26. The protrusion is an arc-shaped protrusion. One end of the release support 26 has a recess to cooperate with the protrusion of the release positioning block 15. The other end of the release support 26 is connected to one end of the wrench arm 1 through the release block 25. When the clamping force of the spring 18 is less than the axial component force applied by the wrench arm 1 to the release 25, the release assembly is activated. The wrench arm 1 rotates inside the wrench cavity, thus producing a slipping feel. The positioning rod 17 limits the stroke of the push rod 22 to prevent the preset torque of the wrench from exceeding the torque limit during the release process.

[0039] The controller 12 uses an existing embedded controller, which specifically includes a main control module, a conditioning module, and a communication module. The conditioning module has AD conversion and signal conditioning functions, and the communication module uses a high-performance wireless WiFi module to achieve wireless communication with a control terminal such as a host computer. The controller is connected to an angle detection component, which is also located in the control box. The angle detection component includes a gyroscope, which is used to detect the angle of the wrench.

[0040] During torque preset, the operator pushes the locking ring 6 upwards and rotates the handle 5. The push rod 22 moves within the handle 3, compressing or relaxing the spring 18. The encoder core 20 rotates synchronously with the handle 5, generating different numbers of pulse signals based on the angle of rotation. The controller 12 calculates the preset torque based on the pulse signals. The preset torque value is displayed on the screen 9 and synchronized to the control terminal via wireless communication. When performing operations with different torque requirements, the operator only needs to change the preset torque value of the wrench, and the control terminal will automatically update it without manual setting. When the preset value of the wrench is the maximum value for that model of wrench, the reset button of the encoder core 20 touches the positioning rod 17, setting the preset torque to the maximum value. The control terminal receives the information and prompts that the preset torque has reached the upper limit of the wrench torque.

[0041] During the tightening process, the tightening force is transmitted to the extension rod 3 through the torque preset component and the release device. The strain sensor 24 deforms along with the extension rod 3. The conditioning module converts the resistance change information into a digital signal and transmits it to the main control module. The main control module calculates the current torque value, which is displayed on the display screen 9 in real time and synchronized to the control terminal, such as the host computer. When the torque reaches the preset torque, the clamping force provided by the spring 18 is insufficient, and the release block 25 disengages from the release support 26 and rotates. The reaction force generated by the tightening component drives the wrench arm 1 to rotate. The wrench arm 1 strikes the inner wall of the extension rod 3, producing a release sound and a slipping feel. At the same time, the buzzer sounds, the vibration motor vibrates to remind the operator, the alarm light flashes, the display screen 9 retains the maximum peak value, and the monitoring system judges the work quality and saves the work information. When the wrench is released, the clamping force of the spring 18 returns the extension rod 3 to its original position, and the operator can perform the next operation. Overall, this system meets the comprehensive requirements of digital display wrenches for torque control accuracy, ease of operation, data recording and transmission, and work efficiency.

[0042] This invention can display the torque value applied by the wrench in real time and accurately, and can correct the tightening torque based on the real-time torque value to improve the accuracy of bolt tightening torque.

[0043] Example 2 This embodiment discloses a working method for a mechanically release digital display wrench with a quick torque setting, referencing... Figure 6 As shown, it includes the following: The operator selects the preset torque according to the process requirements. During the rotation of the handle, the angle information is transmitted to the controller through the encoder. The main control module converts the angle information into preset torque information according to the amount of pulse data from the encoder. The preset torque value is displayed on the screen and synchronized to the control terminal. During the tightening process, the torque is transmitted to the conditioning module through the strain sensor. The main control module processes and calculates the current torque value based on the information from the conditioning module. During the tightening process, the angle module collects information and transmits it to the conditioning module. The main control module detects the position and trajectory of the wrench based on the angle information. The torque and angle values ​​during the tightening process are displayed on the screen. When the preset torque is reached, the spring's elastic force is insufficient to support it, the tripping component activates, the wrench slips, and the buzzer, vibration motor, and alarm light indicate that the operation is qualified. Multiple prompts ensure effective control over the overall work quality.

[0044] Tightening operation data is stored in the storage module and simultaneously transmitted to the control terminal, allowing users to directly view relevant data during the tightening operation through the control terminal, with real-time availability and traceability.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mechanically release digital wrench with quick torque setting, comprising a wrench arm, one end of which is mounted inside an extension rod and rotatable relative to the extension rod, and a handle disposed on the outer side of the other end of the extension rod, the handle being rotatable relative to the extension rod, the extension rod being hollow, characterized in that, The extension rod is equipped with a torque preset component. One end of the torque preset component is connected to the wrench arm via a release component. The torque preset component includes a spring, which is sleeved around the positioning rod. The maximum length of the spring is greater than the length of the positioning rod. One end of the spring is connected to an encoder, which is connected to a push rod. The push rod is connected to a handle. During the rotation of the handle, the push rod is driven to perform linear and rotary motion. The encoder is connected to a controller, which is located inside a control box. The control box is installed on the extension rod. A strain sensor is also provided on the outer surface of the extension rod. The controller is connected separately to the strain sensor and the alarm component.

2. The mechanically released digital wrench with quick torque setting according to claim 1, characterized in that, The strain sensor is connected to the controller and is located on the outer surface of the extension rod. The control box also includes an angle detection component, an alarm component, and a communication module, each of which is individually connected to the controller.

3. The mechanically released digital wrench with rapid torque setting according to claim 1, characterized in that, The controller is connected to the control terminal; The alarm components include a buzzer, a vibration motor, and an alarm light, and are installed in the control box.

4. A mechanically release digital wrench with rapid torque setting according to claim 1, characterized in that, One end of the spring is fixed to the spring positioning ring, which is in contact with the encoder. The spring positioning ring is hollow so that the positioning rod can pass through it. After the positioning rod passes through the spring positioning ring, it can trigger the reset button of the encoder.

5. A mechanically release digital wrench with rapid torque setting according to claim 1, characterized in that, The end of the spring away from the encoder is connected to the tripping component via a spring top block, and one end of the positioning rod is connected to the spring top block; The tripping component includes a tripping positioning block, a tripping support, and a tripping block. The middle of the tripping positioning block has a protrusion facing the wrench arm. One end of the tripping support has a recess to cooperate with the protrusion of the tripping positioning block. The two sides of the protrusion of the tripping positioning block are in contact with the spring top block. The other end of the tripping support is movably arranged between the tripping block and the wrench arm.

6. A mechanically released digital wrench with quick torque setting according to claim 1, characterized in that, The encoder includes an encoder housing and an encoder core. The encoder housing is located inside the extension rod and is movable relative to the extension rod. The encoder core passes through the encoder housing and is detachably connected to the push rod.

7. A mechanically released digital wrench with quick torque setting according to claim 1, characterized in that, The handle is hollow, and a first fixing block is provided at the end of the extension rod away from the wrench lever arm. The push rod passes through the first fixing block and enters the handle. The handle and the first fixing block are connected by a threaded structure. A second fixing block is provided inside the handle, and the push rod passes through the second fixing block. The push rod can move linearly relative to the first fixing block. The second fixing block is connected to the handle through a threaded structure. When the handle rotates, it drives the push rod to rotate through the second fixing block. Under the action of the first fixing block, the push rod simultaneously moves linearly.

8. A mechanically released digital wrench with quick torque setting according to claim 7, characterized in that, The handle is provided with a positioning step inside, which positions the second fixing block. A limiting step is provided on the outside of the handle, and the handle is detachably connected to the locking ring through the limiting step.

9. A mechanically released digital wrench with quick torque setting according to claim 1, characterized in that, The control box includes a lower control cover and a higher control cover, which are detachably connected. A display screen is installed on the higher control cover and is connected to the controller.

10. A method for operating a mechanically released digital display wrench with rapidly set torque according to any one of claims 1-9, characterized in that, Includes the following: The operator selects the preset torque according to the process requirements and rotates the handle. During the rotation of the handle, the angle information of the push rod is transmitted to the controller through the encoder. The controller converts the angle information into preset torque information based on the pulse data of the encoder. During the operation of the wrench lever arm, the strain sensor transmits the collected data to the controller, which then calculates the current torque value based on the data transmitted by the strain sensor. When the current torque value reaches the preset torque, the tripping component activates, and the controller sends a message to the alarm component to indicate that it is qualified.

Images