Subway bolt disassembly-free torque detection device and method

Abstract

The invention relates to a metro bolt disassembly-free torque detection device and a metro bolt disassembly-free torque detection method. A detection hole matched with the torque detection sensor is formed in the center of the outer side face of the nut disc clamp, movable clamping pieces are arranged in the circumferential direction of the detection hole, a motor is installed on one side of the nut disc clamp, the output end of the motor is connected with a driving gear, and the driving gear is meshed with a driven gear installed on the back face of the nut disc clamp. The driven gear is provided with a sliding groove matched with the sliding block at the bottom of the movable clamping piece, a torque sensing receiver matched with the torque detection sensor and a main control chip are installed in the machine shell, a wireless transmission module is installed on the top of the machine shell, and an early warning module and a display module are arranged on one side of the machine shell. Torque detection can be completed without disassembling a bolt, and the detection precision is far higher than that of a traditional manual screwing method.

Description

Technical Field

[0001] This invention relates to the field of machinery, and specifically to a device and method for detecting the torque of subway bolts without disassembly. Background Technology

[0002] In subway operation and maintenance, bolts, as critical connecting components, directly affect the operational safety and service life of trains due to their tightness. Subways operate in an environment of frequent starts and stops and complex vibrations, making bolts highly susceptible to loosening and torque decay. Failure to detect and address these issues promptly can lead to serious safety accidents such as detached train parts and electrical malfunctions. Furthermore, bolts are widely distributed and operate under complex conditions, covering multiple parts including the car body, bogies, and electrical equipment. The torque requirements for bolts in different locations vary, and the testing environments also differ significantly, such as the dim lighting in tunnels and the confined space under the train. These factors present numerous challenges to bolt torque testing.

[0003] Traditional bolt torque testing primarily relies on manual inspection and torque wrench checks. In subway maintenance scenarios, the tightening method is often used to check bolt torque, which involves steadily increasing the torque with a wrench and observing the torque change as the bolt rotates to determine its tightness. This traditional testing method has several drawbacks: First, it is inefficient and lacks accuracy. The manual tightening method relies on experience, resulting in low efficiency, large deviations, and a high risk of missed or false detections. It is also difficult to operate in concealed or confined spaces, potentially damaging components. Furthermore, it lacks real-time monitoring and data recording, hindering long-term tracking and analysis. Second, existing tools have significant limitations. Most are bulky, lack operational flexibility, and are poorly adapted to complex environments. Some require bolt disassembly, increasing the process and risk of damage. Their level of automation is low, only capable of single measurements, failing to meet the information-based needs of maintenance. Third, existing tools lack customized design. General-purpose tools are not adapted to the diverse specifications and working conditions of subway bolts, and single sockets require frequent replacement. They are not optimized for vibration environments, making testing susceptible to interference. Finally, they are slow and have short operating times, making rapid and comprehensive testing difficult. In addition, due to the limitations of the subway's operating environment and its own structure, it is difficult for the tool tip to make contact with the bolt when monitoring bolts in narrow spaces, gaps, or with different installation directions, making it impossible to carry out the inspection.

[0004] It is evident that the shortcomings of traditional testing devices and methods result in low efficiency, insufficient accuracy, and high operational risks in subway bolt inspection, making it difficult to achieve comprehensive and real-time status monitoring and data management. The inspection process is prone to missed detections and misjudgments; difficulties in operating concealed areas may damage components, and rapid and comprehensive inspection is challenging. In the long run, this impacts operational safety and the level of intelligence, increasing operation and maintenance costs and potential safety risks. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a simple and easy-to-operate intelligent torque detection device that enables customized torque detection without disassembly. It can accurately collect torque data without removing bolts and can be operated flexibly in confined and hidden spaces. This invention completely solves the defects of traditional detection methods, such as low efficiency, poor accuracy, difficult operation, weak compatibility with existing tools, and insufficient intelligence. It provides a safe, efficient, and intelligent torque detection device and method for subway bolts that do not require disassembly, thus overcoming the deficiencies of existing technologies.

[0006] The technical solution of this invention is implemented as follows: A subway bolt torque detection device without disassembly includes a housing. A connector is installed at the front end of the housing, and a torque detection sensor is installed inside the connector. The outer side of the connector is fixedly connected to a nut disc clamp. A detection hole that cooperates with the torque detection sensor is provided at the center of the outer side of the nut disc clamp. A movable clamping piece is provided around the circumference of the detection hole. A motor is installed on one side of the nut disc clamp. The output end of the motor is connected to a drive gear. The drive gear meshes with a driven gear installed on the back of the nut disc clamp. The driven gear is provided with a groove that cooperates with the bottom slider of the movable clamping piece. A torque sensor receiver that cooperates with the torque detection sensor and a main control chip are installed inside the housing. A wireless transmission module is installed on the top of the housing, and an early warning module and a display module are provided on one side of the housing.

[0007] A non-disassembly torque detection device for subway bolts includes a housing. A reversing connector is installed at the front end of the housing. An L-shaped crankshaft is fixedly installed at the outer end of the reversing connector. A connecting piece is installed at the front end of the L-shaped crankshaft. A torque detection sensor is installed inside the connecting piece. The outer side of the connecting piece is fixedly connected to a nut disc clamp. A detection hole that mates with the torque detection sensor is provided at the center of the outer side of the nut disc clamp. A movable clamping piece is provided around the circumference of the detection hole. A motor is installed on one side of the nut disc clamp. The output end of the motor is connected to a drive gear. The drive gear meshes with a driven gear installed on the back of the nut disc clamp. The driven gear has a groove that mates with the bottom slider of the movable clamping piece. A torque sensor receiver that mates with the torque detection sensor and a main control chip are installed inside the housing. A wireless transmission module is installed on the top of the housing. An early warning module and a display module are provided on one side of the housing.

[0008] Furthermore, a handle is fixedly installed at the bottom of the housing, a button control module connected to the main control chip is installed at the front end of the handle, and a battery power supply module connected to the main control chip is installed at the bottom of the handle.

[0009] Furthermore, a lifting handle is installed on the top of the housing, a button control module connected to the main control chip is provided in the warning module, and a battery power supply module connected to the main control chip is installed on the bottom of the housing.

[0010] Furthermore, the housing is a cylindrical structure, the connector is a hollow tubular structure, and the torque detection sensor is fixedly installed at the front end of the connector. The torque detection sensor is a laser torque sensor, and the optical detection surface of the torque detection sensor corresponds to the center position of the detection hole.

[0011] Furthermore, the axis of the housing and the axis of the nut disc clamp are the same straight line.

[0012] Furthermore, the axis of the housing is perpendicular to the axis of the nut disc clamp.

[0013] Furthermore, the mounting direction of the handle is perpendicular to the axis of the nut disc clamp, and the bottom of the handle is connected to the battery power supply module through a power-feeding connector.

[0014] Furthermore, the lifting handle is a long strip-shaped semi-square frame structure, and the installation direction of the lifting handle is parallel to the axis of the nut disc clamp. The bottom of the housing is connected to the battery power supply module through a power supply plug connector.

[0015] A method for using the subway bolt non-disassembly torque testing device as described above, the method being as follows: When the testing space is unrestricted, the nut disc clamp is placed on the nut of the bolt to be tested. The motor is turned on to drive the drive gear to rotate, which in turn drives the driven gear to rotate. As the driven gear rotates, the movable clamping plate retracts and clamps the nut. At this time, the housing is rotated clockwise along the axis of the nut disc clamp, and the movable clamping plate applies a tightening torque to the nut of the bolt to be tested. The optical detection surface of the torque detection sensor monitors the outer surface of the nut through the detection hole and transmits the collected torsion angle information to the torque sensor receiver. The main control chip processes and calculates the data in real time, converts the torsion angle into torque data, and stores it. Then, it is displayed through the display module. When the bolt torque does not reach the preset value or exceeds the preset value, the warning module issues a warning and transmits the data to the host computer for storage through the wireless transmission module. The detected bolt torque is recorded and stored to provide data support for further maintenance by maintenance personnel. When the testing space is limited, the angle of the reversing connector is adjusted according to the bolt installation position. After adjustment, the reversing connector is fixed. The L-shaped crankshaft is inserted into the confined space, and the nut disc clamp is placed on the nut of the bolt to be tested. The motor is turned on to drive the drive gear to rotate, which in turn drives the driven gear to rotate. When the driven gear rotates, the movable clamp retracts and clamps the nut. At this time, the nut disc clamp rotates clockwise along its axis, and the movable clamp applies a tightening torque to the nut of the bolt to be tested. The optical detection surface of the torque detection sensor monitors the outer surface of the nut through the detection hole and transmits the collected torsion angle information to the torque sensor receiver. The main control chip processes and calculates the data in real time, converts the torsion angle into torque data, and stores it. Then, it is displayed through the display module. When the bolt torque does not reach the preset value or exceeds the preset value, the warning module issues a warning and transmits the data to the host computer for storage via the wireless transmission module. The detected bolt torque is recorded and stored to provide data support for further maintenance by maintenance personnel.

[0016] The present invention has the following positive effects: 1. This invention significantly improves testing efficiency by employing a non-disassembly testing method, completely eliminating the cumbersome process of disassembling bolts required in traditional testing. Torque testing can be completed without disassembling the bolts. In subway maintenance scenarios, the testing efficiency for a single bolt is greatly improved. Simultaneously, it avoids problems such as thread damage and component deformation that may occur during bolt disassembly, reducing the equipment failure rate caused by testing operations. The optical detection surface accurately captures the bolt torsion angle information, which is then converted into torque data in real time by the main control chip, resulting in testing accuracy far exceeding that of traditional manual tightening methods. Automatic comparison is possible during testing; if the torque exceeds the preset range, the warning module immediately issues an audible and visual alarm, effectively preventing missed detections and misjudgments.

[0017] 2. This invention can cope with complex environments and flexibly handle confined spaces. For complex inspection environments such as the confined space under trains in subway tunnels, this invention designs two structural forms of the device. The conventional structure has its housing and nut disc clamp axis collinear, suitable for bolt inspection in open spaces; while the device equipped with a reversing connector and an L-shaped crankshaft allows adjustment of the reversing connector angle to make the housing and nut disc clamp axis perpendicular to each other, and the L-shaped crankshaft extends into the crevice space to inspect bolts in different installation directions. The torque detection sensor adopts an anti-vibration fixing structure, which can effectively resist vibration interference and ensure the stability of the detection data; the main control chip has a built-in filtering algorithm that can filter out noise signals generated by vibration, further improving data accuracy.

[0018] 3. This invention achieves intelligent operation and maintenance, enabling full lifecycle tracking through data-driven management. The wireless transmission module integrated into this invention can transmit detection data to a host computer system in real time, achieving automatic storage, analysis, and management of bolt torque data. The host computer system can establish a detection file for each bolt, recording information such as the time of each detection, torque value, and personnel involved. By analyzing historical data, it can predict bolt torque attenuation trends, providing data support for subway operation and maintenance departments to formulate preventative maintenance plans.

[0019] 4. This invention offers a comprehensive upgrade in safety, eliminating detection risks. Traditional detection methods, where manual operation of torque wrenches in confined spaces, are prone to accidents such as bumps and crushing. Furthermore, during bolt disassembly, sudden bolt breakage can cause parts to detach, endangering worker safety. This invention's non-disassembly detection method eliminates the need for workers to perform high-intensity operations with close contact with bolts, reducing safety risks during the detection process. Simultaneously, the device's early warning module promptly alerts workers to abnormal bolt torque, preventing serious safety accidents such as train component detachment and electrical faults caused by undetected loose bolts. This provides safe, efficient, and intelligent technical support for subway operation and maintenance. Attached Figure Description

[0020] Figure 1 This is one of the main view structural schematic diagrams of the subway bolt non-disassembly torque detection device of the present invention.

[0021] Figure 2 For the present invention Figure 1 A schematic diagram of the rear view structure.

[0022] Figure 3 This is one of the side structural schematic diagrams of the subway bolt non-disassembly torque detection device of the present invention.

[0023] Figure 4 For the present invention Figure 1 One of the schematic diagrams of the usage state structure.

[0024] Figure 5 For the present invention Figure 1 The second schematic diagram of the usage state structure.

[0025] Figure 6 This is the second schematic diagram of the main structure of the subway bolt torque detection device without disassembly according to the present invention.

[0026] Figure 7 This is the second side structural schematic diagram of the subway bolt non-disassembly torque detection device of the present invention.

[0027] Figure 8 This is a schematic diagram of the internal structure of the present invention.

[0028] Figure 9This is the third schematic diagram of the main structure of the subway bolt non-disassembly torque detection device of the present invention.

[0029] Figure 10 This is the fourth schematic diagram of the main structure of the subway bolt non-disassembly torque detection device of the present invention. Detailed Implementation

[0030] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, 8, 9, and 10, a non-disassembly torque detection device for subway bolts includes a housing 1. A connector is installed at the front end of the housing 1, and a torque detection sensor 2 is installed inside the connector. The outer side of the connector is fixedly connected to a nut disc clamp 3. A detection hole 12 that cooperates with the torque detection sensor 2 is provided at the center of the outer side of the nut disc clamp 3. A movable clamping piece 4 is provided in the circumferential direction of the detection hole 12. A motor 11 is installed on one side of the nut disc clamp 3. The output end of the motor 11 is connected to a drive gear 12. The drive gear 12 meshes with a driven gear 13 installed on the back of the nut disc clamp 3. The driven gear 13 is provided with a sliding groove that cooperates with the bottom slider of the movable clamping piece 4. A torque sensor receiver that cooperates with the torque detection sensor 2 and a main control chip are installed inside the housing 1. A wireless transmission module 7 is installed on the top of the housing 1, and an early warning module 6 and a display module 5 are provided on one side of the housing 1.

[0031] A non-disassembly torque detection device for subway bolts includes a housing 1. A reversing connector 16 is installed at the front end of the housing 1. An L-shaped crankshaft 15 is fixedly installed at the outer end of the reversing connector 16. A connector is installed at the front end of the L-shaped crankshaft 15. A torque detection sensor 2 is installed inside the connector. The outer side of the connector is fixedly connected to a nut disc clamp 3. A detection hole 12 is provided at the center of the outer side of the nut disc clamp 3, which cooperates with the torque detection sensor 2. A movable clamp 4 is provided around the detection hole 12. A motor 11 is installed on one side of the nut disc clamp 3. The output end of the motor 11 is connected to a drive gear 12. The drive gear 12 meshes with a driven gear 13 installed on the back of the nut disc clamp 3. The driven gear 13 is provided with a groove that cooperates with the bottom slider of the movable clamp 4. A torque sensor receiver and a main control chip that cooperate with the torque detection sensor 2 are installed inside the housing 1. A wireless transmission module 7 is installed on the top of the housing 1. An early warning module 6 and a display module 5 are provided on one side of the housing 1.

[0032] A handle 8 is fixedly installed at the bottom of the housing 1. A button control module 10 connected to the main control chip is installed at the front end of the handle 8, and a battery power supply module 9 connected to the main control chip is installed at the bottom of the handle 8. A lifting handle 14 is installed at the top of the housing 1. A button control module 10 connected to the main control chip is set in the warning module 6, and a battery power supply module 9 connected to the main control chip is installed at the bottom of the housing 1. The housing 1 has a cylindrical structure, and the connecting parts have a hollow tubular structure. A torque detection sensor 2 is fixedly installed at the front end of the connecting parts. The torque detection sensor 2 is a laser torque sensor, and the optical detection surface of the torque detection sensor 2 corresponds to the center position of the detection hole 12. The axis of the housing 1 is the same straight line as the axis of the nut disc clamp 3. The axis of the housing 1 is perpendicular to the axis of the nut disc clamp 3. The installation direction of the handle 8 is perpendicular to the axis of the nut disc clamp 3, and the bottom of the handle 8 is connected to the battery power supply module 9 through a power-feeding connector. The lifting handle 14 is a long strip-shaped semi-square frame structure. The installation direction of the lifting handle 14 is parallel to the axis of the nut disc clamp 3. The bottom of the housing 1 is connected to the battery power supply module 9 through a power supply plug connector.

[0033] A method for using a non-disassembly torque detection device for subway bolts is as follows: When the detection space is unrestricted, a nut disc clamp 3 is fitted onto the nut of the bolt to be tested. The motor 11 is turned on, driving the drive gear 12 to rotate. The drive gear 12 drives the driven gear 13 to rotate. As the driven gear 13 rotates, its groove drives the bottom slider of the movable clamping plate 4 to move. The movable clamping plate 4 retracts and clamps the nut. At this time, the housing 1 rotates clockwise along the axis of the nut disc clamp 3. The movable clamping plate 4 applies a tightening torque to the nut of the bolt to be tested, and the torque detection sensor 2... The optical detection surface monitors the outer surface of the nut through the detection hole 12, and transmits the collected torsion angle information to the torque sensor receiver. The main control chip processes and calculates the data in real time, converting the torsion angle into torque data, which is then stored and displayed through the display module 5. When the bolt torque does not reach or exceeds the preset value, the warning module 6 issues a warning, and the data is transmitted to the host computer for storage via the wireless transmission module 7. The detected bolt torque is recorded and stored, providing data support for further maintenance by repair personnel. When the detection space is limited, [further details are needed]. Adjust the angle of the reversing connector 16 according to the bolt installation position, and then fix the reversing connector 16. Using the L-shaped crankshaft 15, extend it into the confined space and place the nut disc clamp 3 onto the nut of the bolt to be tested. Turn on the motor 11 to drive the drive gear 12 to rotate. The drive gear 12 drives the driven gear 13 to rotate. When the driven gear 13 rotates, its groove drives the bottom slider of the movable clamp 4 to move. The movable clamp 4 retracts and clamps the nut. At this time, it rotates clockwise along the axis of the nut disc clamp 3, and the movable clamp 4 tightens the nut of the bolt to be tested. The optical detection surface of the torque sensor 2 monitors the outer surface of the nut through the detection hole 12 and transmits the collected torsion angle information to the torque sensor receiver. The main control chip processes and calculates the data in real time, converts the torsion angle into torque data, and stores it. Then, it is displayed through the display module 5. When the bolt torque does not reach the preset value or exceeds the preset value, the warning module 6 issues a warning and transmits the data to the host computer for storage through the wireless transmission module 7. The detected bolt torque is recorded and stored to provide data support for maintenance personnel to carry out further maintenance.

[0034] This invention provides two preferred structural forms of the subway bolt torque detection device that do not require disassembly, each suitable for different operating environments.

[0035] Example 1: See Figure 1 , 2Figures 3, 4, 5, 6, 7, 10, and related figures are provided. This embodiment is suitable for working conditions where the detection space is unrestricted or relatively open. The device mainly includes a housing 1. The housing 1 has a cylindrical structure and integrates the core electronic components inside. A connector is installed at the front end of the housing 1. A torque detection sensor 2 is fitted and fixed inside the connector. In this embodiment, the torque detection sensor 2 is preferably a laser torque sensor. A nut disc clamp 3 is fixedly connected to the outside of the connector. A detection hole 12 corresponding to the optical detection surface of the torque detection sensor 2 is opened at the center of the nut disc clamp 3. A radially retractable movable clamping piece 4 is provided in the circumferential direction around the detection hole 12 for clamping the nut. A small motor 11 is installed on one side of the inside of the nut disc clamp 3. The output shaft of the motor 11 is connected to a drive gear 12. The drive gear 12 meshes with a driven gear 13 installed on the inside or back of the nut disc clamp 3. The driven gear 13 is provided with at least one curved groove or cam profile, which cooperates with the slider structure at the bottom of the movable clamp 4.

[0036] Inside housing 1, in addition to torque sensor 2, there is a torque sensor receiver connected to it, as well as a main control chip responsible for data processing and logic control. One side of housing 1 integrates a display module 5 for real-time display of torque values, status, and other information; and an early warning module 6 for issuing audible and visual alarms when the detection results are abnormal. A wireless transmission module 7 is installed on the top of housing 1 for transmitting the detection data to a host computer.

[0037] A handle 8 for easy handheld operation is fixedly installed on the bottom of the housing 1. A button control module 10 containing function buttons is located near the front of the handle 8; this module is connected to the main control chip. A detachable battery power supply module 9 is connected to the bottom of the handle 8 via a power connector to power the entire device. Alternatively, a lifting handle 14 is installed on the top of the housing 1, a button control module 10 connected to the main control chip is located in the warning module 6, and a battery power supply module 9 connected to the main control chip is installed on the bottom of the housing 1.

[0038] In this embodiment, the axis of the housing 1 and the axis of the nut disc clamp 3 are designed to be on the same straight line. At the same time, the installation direction of the handle 8 is set to be perpendicular to the axis of the nut disc clamp 3.

[0039] In actual operation, the operator holds handle 8 and directly places the nut disc clamp 3 onto the nut of the bolt to be tested. The motor 11 is started via the button control module 10, which drives the drive gear 12 to rotate, thereby driving the driven gear 13 to rotate. As the driven gear 13 rotates, the sliding groove on it pushes the slider at the bottom of the movable clamping piece 4 to retract inward, causing all the movable clamping pieces 4 to evenly clamp the nut from all sides. After secure clamping, the operator grips handle 8 and rotates the housing 1 clockwise along the axis of the nut disc clamp 3, i.e., the axis of the bolt. Since the clamp has clamped the nut, this rotation applies a tightening torque to the nut through the movable clamping pieces 4. During this process, the laser optical detection surface of the torque detection sensor 2, installed inside the connector, faces the detection hole 12. This detection surface continuously monitors the minute changes in the torsional angle of the nut's outer surface caused by the force, and transmits the collected optical torsional angle signal to the torque sensor receiver inside the housing 1.

[0040] The torque sensor receiver sends the signal to the main control chip for real-time filtering, calculation, and analysis, accurately converting the optical torsion angle into a torque value according to a preset algorithm. The processed real-time torque data is immediately displayed on display module 5. The main control chip compares the real-time torque with a preset torque standard value corresponding to the current bolt specification and position. If the measured torque does not reach the preset range, it indicates looseness; or if it exceeds the preset range, it indicates overtightness. The warning module 6 will immediately activate an audible and visual alarm to alert the operator. Simultaneously, regardless of whether the test result is abnormal, the test time, torque value, and operator information are uploaded in real-time to the backend upper computer management system via wireless transmission module 7, forming an electronic record for easy tracking, analysis, and maintenance plan development. After the test is completed, the clamps are loosened and the device is removed.

[0041] Example 2, see Figure 8 , 9 Referring to figures 10 and 10, this embodiment is suitable for bolt inspection in confined spaces, such as the bottom of subway bogies, equipment gaps, and other narrow and concealed areas. The core structure of this embodiment is basically the same as the first embodiment, with the key improvement being the addition of steering and extension components to adapt to non-linear operating paths. At the front end of the housing 1, a reversing connector 16 is first installed. The reversing connector 16 can be adjusted and locked within a certain angle range. An L-shaped crankshaft 15 is fixedly installed at the outer end of the reversing connector 16. The free end of the L-shaped crankshaft 15 is equipped with components identical to those in the first embodiment, including a connector, torque sensor 2, nut disc clamp 3, movable clamp 4, motor 11, gear set, etc.

[0042] In this embodiment, a long, narrow handle 14 is mounted on the top of the housing 1. The handle 14 is mounted in a direction parallel to the axis of the nut disc clamp 3. The button control module 10 can be integrated into the warning module 6 area. Power is still supplied by the battery power module 9 at the bottom of the housing. Alternatively, a handle 8 for easy hand operation is fixedly mounted on the bottom of the housing 1. A button control module 10 containing function buttons is located near the front end of the handle 8, and this module is connected to the main control chip. The bottom of the handle 8 is connected to the detachable battery power module 9 via a power connector to power the entire device.

[0043] By adjusting the angle of the reversing connector 16, the axis of the housing 1 can be made perpendicular to the axis of the nut disc clamp 3. This structure allows the handheld housing portion to be located in an open space, while the clamp portion extends into a confined space via an L-shaped crankshaft.

[0044] In actual operation, the operator first manually adjusts the reversing connector 16 to the optimal angle and locks it according to the specific position and orientation of the bolt to be tested in the narrow space. Then, holding the lifting handle 14 or the housing, the operator inserts the nut disc clamp 3 at the front end of the L-shaped crankshaft 15 into the narrow space and places it on the target nut. The core workflow, including motor-driven clamping, torque application, laser detection, data processing, display warning, and data transmission, is completely consistent with that of Example 1. Throughout the testing process, the operator's hands and the main body of the housing can be located in a relatively open space, facilitating operation and observation. Only the clamp and the L-shaped extension enter the confined space, completely solving the problem that traditional tools cannot operate in gaps.

[0045] Both implementations of the nut disc clamp 3 feature adaptive adjustment, accommodating bolts and nuts of varying sizes within a certain range. Non-contact optical measurement using a laser torque sensor offers high accuracy and avoids the errors and wear associated with contact measurements. The main control chip's built-in anti-vibration filtering algorithm, combined with the sensor's anti-shake structure, ensures the stability of the detection data under the vibration environment of subway operation.

[0046] Wireless data transmission and host computer database enable automatic recording and information management of inspection data, supporting full lifecycle tracking and predictive maintenance analysis of bolt status.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A subway bolt torque detection device that does not require disassembly, comprising a housing (1), characterized in that: The front end of the housing (1) is equipped with a connector, and a torque detection sensor (2) is installed inside the connector. The outer side of the connector is fixedly connected to the nut disc clamp (3). The center of the outer side of the nut disc clamp (3) is provided with a detection hole (12) that cooperates with the torque detection sensor (2). A movable clamp (4) is provided in the circumferential direction of the detection hole (12). A motor (11) is installed on one side of the nut disc clamp (3). The output end of the motor (11) is connected to the drive gear (12). The drive gear (12) meshes with the driven gear (13) installed on the back of the nut disc clamp (3). The driven gear (13) is provided with a sliding groove that cooperates with the bottom slider of the movable clamp (4). A torque sensor receiver and a main control chip that cooperate with the torque detection sensor (2) are installed inside the housing (1). A wireless transmission module (7) is installed on the top of the housing (1). A warning module (6) and a display module (5) are provided on one side of the housing (1).

2. A subway bolt torque detection device that does not require disassembly, comprising a housing (1), characterized in that: A reversing connector (16) is installed at the front end of the housing (1). An L-shaped crankshaft (15) is fixedly installed at the outer end of the reversing connector (16). A connector is installed at the front end of the L-shaped crankshaft (15). A torque detection sensor (2) is installed inside the connector. The outer side of the connector is fixedly connected to a nut disc clamp (3). A detection hole (12) that cooperates with the torque detection sensor (2) is provided at the center of the outer side of the nut disc clamp (3). A movable clamping piece (4) is provided in the circumferential direction of the detection hole (12). A nut disc clamp (3) is installed on one side. The motor (11) is connected to the drive gear (12) at its output end. The drive gear (12) meshes with the driven gear (13) installed on the back of the nut disc clamp (3). The driven gear (13) is provided with a sliding groove that cooperates with the bottom slider of the movable clamp (4). The housing (1) is equipped with a torque sensor receiver that cooperates with the torque detection sensor (2) and a main control chip. The top of the housing (1) is equipped with a wireless transmission module (7). The housing (1) is equipped with a warning module (6) and a display module (5) on one side.

3. The subway bolt torque detection device without disassembly according to claim 1 or 2, characterized in that: The bottom of the housing (1) is fixedly equipped with a handle (8), the front end of the handle (8) is equipped with a button control module (10) connected to the main control chip, and the bottom of the handle (8) is equipped with a battery power supply module (9) connected to the main control chip.

4. The subway bolt torque detection device without disassembly according to claim 1 or 2, characterized in that: The top of the housing (1) is equipped with a lifting handle (14), the warning module (6) is equipped with a button control module (10) connected to the main control chip, and the bottom of the housing (1) is equipped with a battery power supply module (9) connected to the main control chip.

5. The subway bolt torque detection device without disassembly according to claim 1 or 2, characterized in that: The housing (1) is a cylindrical structure, the connector is a hollow tubular structure, the torque detection sensor (2) is fixedly installed at the front end of the connector, the torque detection sensor (2) is a laser torque sensor, and the optical detection surface of the torque detection sensor (2) corresponds to the center position of the detection hole (12).

6. The subway bolt torque detection device without disassembly according to claim 1, characterized in that: The axis of the housing (1) and the axis of the nut disc clamp (3) are the same straight line.

7. The subway bolt torque detection device without disassembly according to claim 2, characterized in that: The axis of the housing (1) is perpendicular to the axis of the nut disc clamp (3).

8. The subway bolt torque detection device without disassembly according to claim 3, characterized in that: The installation direction of the handle (8) is perpendicular to the axis of the nut disc clamp (3), and the bottom of the handle (8) is connected to the battery power supply module (9) through a power-taking plug connector.

9. The subway bolt torque detection device without disassembly according to claim 4, characterized in that: The lifting handle (14) is a long strip-shaped semi-square frame structure. The installation direction of the lifting handle (14) is parallel to the axis of the nut disc clamp (3). The bottom of the housing (1) is connected to the battery power supply module (9) through a power supply plug connector.

10. A method of using the subway bolt non-disassembly torque detection device as described in claim 1 or 2, characterized in that, The method is as follows: When the detection space is unrestricted, the nut disc clamp (3) is placed on the nut of the bolt to be tested. The motor (11) is turned on to drive the drive gear (12) to rotate. The drive gear (12) drives the driven gear (13) to rotate. When the driven gear (13) rotates, the movable clamp (4) retracts and clamps the nut. At this time, the housing (1) is rotated clockwise along the axis of the nut disc clamp (3). The movable clamp (4) applies a tightening torque to the nut of the bolt to be tested. The optical detection surface of the torque detection sensor (2) monitors the outer surface of the nut through the detection hole (12) and transmits the collected torsion angle information to the torque sensor receiver. The main control chip processes and calculates the data in real time, converts the torsion angle into torque data, and stores it. Then, it is displayed through the display module (5). When the bolt torque does not reach the preset value or exceeds the preset value, the warning module (6) issues a warning and transmits the data to the host computer for storage through the wireless transmission module (7). The detected bolt torque is recorded and stored to provide data support for maintenance personnel to further maintain the bolt. When the testing space is limited, the angle of the reversing connector (16) is adjusted according to the bolt installation position. After adjustment, the reversing connector (16) is fixed. The L-shaped crankshaft (15) is inserted into the confined space, and the nut disc clamp (3) is fitted onto the nut of the bolt to be tested. The motor (11) is turned on to drive the drive gear (12) to rotate. The drive gear (12) drives the driven gear (13) to rotate. When the driven gear (13) rotates, the movable clamp (4) retracts and clamps the nut. At this time, it rotates clockwise along the axis of the nut disc clamp (3). The movable clamp (4) applies pressure to the nut of the bolt to be tested. The torque of tightening is monitored by the optical detection surface of the torque detection sensor (2) through the detection hole (12) on the outer surface of the nut. The collected torsion angle information is then transmitted to the torque sensor receiver. The main control chip processes and calculates the data in real time, converts the torsion angle into torque data, and stores it. Then, it is displayed through the display module (5). When the bolt torque does not reach the preset value or exceeds the preset value, the warning module (6) issues a warning and transmits the data to the host computer for storage through the wireless transmission module (7). The detected bolt torque is recorded and stored to provide data support for maintenance personnel to further maintain the nut.

Images