Fastener loosening and breaking detection device

Abstract

The invention relates to a fastener loosening and breaking detection device which comprises a base body, a walking pulley, an information storage module and two conductive probes. The walking pulley is rotatably arranged on the base body, a trigger area is formed on one side face of the walking pulley, a plurality of conduction blocks and a plurality of insulation blocks are arranged on the trigger area, the conduction blocks and the insulation blocks are evenly and alternately distributed around the rotating axis of the walking pulley, and the conduction blocks are mutually conducted; the information storage module and the two conductive probes are arranged on the base body, the two conductive probes are electrically connected with the information storage module, and the conductive contact ends of the two conductive probes are arranged on a trigger area of the walking pulley; the walking pulley rotates to enable the conductive contact ends of the two conductive probes to be switched between an on state in which the conductive contact ends are simultaneously located in the conduction block and an off state in which the conductive contact ends are simultaneously located in the insulation block. The information storage module is used for recording the number of times of state switching between the two conductive probes.

Description

Technical Field

[0001] The invention relates to the technical field of equipment status monitoring, and in particular to a fastener loosening detection device. Background Art

[0002] Fasteners such as bolts and nuts are widely used in the connection and assembly between components of various equipment. Monitoring the status of fasteners is an important safety maintenance task. The current conventional maintenance method is to periodically perform on-site maintenance and inspection manually. However, in the maintenance scenario of large equipment such as wind turbines, it is difficult to perform on-site inspection manually due to the high height of the equipment. Therefore, it is necessary to propose a detection device that can remotely detect the status of fasteners. Summary of the invention

[0003] The object of the present invention is to provide a fastener loosening detection device, which can remotely detect the status of fasteners such as bolts and nuts, thereby reducing the difficulty of detection and maintenance.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a fastener loosening detection device, comprising a base, a walking pulley, an information storage module and two conductive probes; the walking pulley is rotatably arranged on the base, a trigger area is formed on one side surface of the walking pulley, a plurality of conductive blocks and a plurality of insulating blocks are arranged on the trigger area, the conductive blocks and the insulating blocks are evenly and alternately arranged around the rotation axis of the walking pulley, and the conductive blocks are mutually conductive; the information storage module and the two conductive probes are both arranged on the base, the two conductive probes are both electrically connected to the information storage module, the conductive contact ends of the two conductive probes are arranged on the trigger area of ​​the walking pulley, the walking pulley is rotated so that the conductive contact ends of the two conductive probes are switched between the two states of being in the passage state of the conductive block at the same time and being in the disconnection state of the insulating block at the same time; the information storage module is used to record the number of state switching information between the two conductive probes.

[0005] Working principle of the present invention:

[0006] When in use, the base is connected and fixed to the monitored part, which is a bolt head or a nut, and the walking pulley slides and contacts the surface of the equipment that is against the monitored part; when the monitored part is loose, the monitored part and the surface of the equipment rotate relative to each other, so that the base moves in a circular motion around the monitored part. During the circular motion of the base, the walking pulley slides and rotates relative to the surface of the equipment, and the trigger area is driven by the walking pulley to rotate, so that the two conductive probes are repeatedly switched between the circuit state and the circuit-breaking state. The information storage module outputs the recorded number of state switching between the two conductive probes to the remote monitoring center. The remote monitoring center calculates the angle through which the walking pulley rotates based on the number of state switching between the two conductive probes, and then calculates the arc length through which the circular motion of the base passes, thereby calculating the angle through which the monitored part rotates, thereby realizing remote monitoring of the loose state of the monitored part. Through such a design, the loose state of fasteners such as bolts and nuts can be detected in real time without manual inspection, which greatly reduces the difficulty of inspection and maintenance.

[0007] Furthermore, the aforementioned fastener loosening detection device further includes a friction gasket, which is an arc-shaped structure, and the base body slides in contact with the friction gasket via a walking pulley.

[0008] Furthermore, in the aforementioned fastener loosening detection device, the outer periphery of the walking pulley is a sawtooth structure, and the sawtooth arrangement direction of the sawtooth structure is set around the rotation axis of the walking pulley.

[0009] Furthermore, in the aforementioned fastener loosening detection device, the walking pulley is made of conductive metal, a plurality of grid holes are formed on the walking pulley, and the plurality of grid holes are arranged around the rotation axis of the walking pulley, and the positions of the grid holes are the insulating blocks.

[0010] Furthermore, in the aforementioned fastener loosening detection device, the grid holes of the walking pulley are filled with an insulator, and the insulator is flush with the opening of the grid hole on the side of the triggering area.

[0011] Furthermore, in a fastener loosening detection device as described above, the walking pulley is made of insulating material, a conductive metal surface is provided on one side surface of the walking pulley, a plurality of hollow structures are formed on the conductive metal surface, the plurality of hollow structures are arranged around the rotation axis of the walking pulley, and the position where the hollow structure is located is the insulating block.

[0012] Furthermore, a fastener loosening detection device as described above also includes a sliding rod, a first elastic member and a monitoring mechanism; the sliding rod is slidably arranged on the base, the sliding direction of the sliding rod is arranged along its length direction, one end of the sliding rod is rotatably mounted with the walking pulley, the rotation axis of the walking pulley is perpendicular to the length direction of the sliding rod, and a first elastic member is arranged between the sliding rod and the base, so that the sliding rod has a movement tendency to slide in the direction of the walking pulley; the monitoring mechanism is arranged on the base, and the monitoring mechanism is used to monitor the sliding position of the sliding rod; the information storage module is electrically connected to the monitoring mechanism, and the information storage module is used to record the monitoring information of the monitoring mechanism.

[0013] Furthermore, in a fastener loosening detection device as described above, a first slide is formed on the base, and the first slide is perpendicular to the length direction of the sliding rod; a second slide is formed on the sliding rod, and the second slide is parallel to the first slide, and a blocking convex portion is formed on the side of the second slide close to the walking pulley; the monitoring mechanism includes a trigger rod, a second elastic member, a conductive member and two conductive terminals; the two conductive terminals are both electrically connected to the information storage module; the conductive member is provided on the trigger rod, and a positioning convex portion is formed on the trigger rod, the trigger rod can be slidably inserted in the first slide and the second slide at the same time, the sliding direction of the trigger rod is set along its length direction, and the trigger rod moves along the length direction of the sliding rod. The trigger rod is positioned by the first slideway, and the trigger rod can move relative to the second slideway along the length direction of the sliding rod. The trigger rod slides to switch the conductive member between the conductive state in contact with the two conductive terminals and the disconnected state in which the conductive member is separated from the two conductive terminals. The information storage module is also used to record the states of the two conductive terminals. The second elastic member is arranged between the trigger rod and the base body, so that the trigger rod has a movement tendency to drive the conductive member to contact the two conductive terminals. In the initial state: the trigger rod and the sliding rod slide relative to each other so that the positioning protrusion and the blocking protrusion are abutted against each other, and the second elastic member is cooperated to lock the trigger rod, so that the conductive member and the two conductive terminals remain in a disconnected state.

[0014] Furthermore, in the aforementioned fastener loosening detection device, a first locking hole is formed on the base, and a second locking hole is formed on the sliding rod; it also includes a locking pin, which is detachably inserted into the first locking hole and the second locking hole at the same time, so that the sliding rod is relatively fixed to the base.

[0015] Furthermore, a fastener loosening detection device as described above also includes a transceiver antenna, which is arranged on the base and electrically connected to the information storage module. The transceiver antenna is used for wireless data transmission and reception between the information storage module and an external reading and writing device, and supplies power to the information storage module.

[0016] The technical solution of the present invention has the following beneficial effects: the state of the fastener nut group can be detected remotely, thereby reducing the difficulty of detection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the three-dimensional structural diagrams of Example 1;

[0018] Figure 2 This is the second three-dimensional structural diagram of Example 1;

[0019] Figure 3 It is a right side view of Example 1;

[0020] Figure 4 for Figure 3 The cross-sectional structure diagram in the AA direction;

[0021] Figure 5 This is one of the three-dimensional views of the assembly structure of the sliding rod, the walking pulley, and the trigger rod of Example 1;

[0022] Figure 6 The second is a three-dimensional diagram of the assembly structure of the sliding rod, the walking pulley, and the trigger rod of Example 1;

[0023] Figure 7 It is a three-dimensional diagram of the layout structure of the conductive probe, the conductive terminal, and the information storage module of Example 1;

[0024] Figure 8 It is a cross-sectional structural diagram of Example 2;

[0025] Fig. 9 This is one of the three-dimensional views of the assembly structure of the sliding rod, the walking pulley, and the trigger rod of Example 3;

[0026] Fig.10 The second stereogram of the assembly structure of the sliding rod, the walking pulley and the trigger rod of Example 3;

[0027] Fig.11 This is one of the three-dimensional views of the assembly structure of the sliding rod, the walking pulley, and the trigger rod of Example 4;

[0028] Fig.12 This is the second stereoscopic view of the assembly structure of the sliding rod, the walking pulley, and the trigger rod of Example 4.

[0029] Description of reference numerals:

[0030] 1-base; 11-bottom plate; 111-mounting ear; 112-PCB substrate; 113-second mounting hole; 12-housing; 121-first locking hole; 122-first slideway; 123-first mounting protrusion; 124-second mounting protrusion; 125-pulley hole; 2-walking pulley; 21-third locking hole; 22-grid hole; 23-insulator; 24-conductive metal surface; 241-hollow structure; 3-conductive probe; 4-sliding rod; 41-third Second slide; 42-blocking protrusion; 43-second locking hole; 44-limiting slide hole; 5-first elastic member; 6-monitoring mechanism; 61-trigger rod; 611-positioning protrusion; 612-installation recess; 62-second elastic member; 63-conductive member; 64-conductive terminal; 7-information storage module; 71-first recording chip; 72-second recording chip; 73-third recording chip; 8-friction gasket; 9-transceiver antenna; 10-clamp; 20-limiting member. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0032] Example 1

[0033] like Figures 1 to 7 A fastener loosening detection device of embodiment 1 includes a base 1, a walking pulley 2, an information storage module 7 and two conductive probes 3; the walking pulley 2 is rotatably arranged on the base 1, a trigger area is formed on one side surface of the walking pulley 2, and a plurality of conductive blocks and a plurality of insulating blocks are arranged on the trigger area, the conductive blocks and the insulating blocks are evenly and alternately arranged around the rotation axis of the walking pulley 2, and the conductive blocks are mutually conductive; the information storage module 7 and the two conductive probes 3 are both arranged on the base 1, the two conductive probes 3 are both electrically connected to the information storage module 7, and the conductive contact ends of the two conductive probes 3 are arranged on the trigger area of ​​the walking pulley 2, and the walking pulley 2 is rotated so that the conductive contact ends of the two conductive probes 3 are switched between the two states of being in the passage state of the conductive block at the same time and being in the disconnection state of the insulating block at the same time; the information storage module 7 is used to record the number of state switching information between the two conductive probes 3. The walking pulley 2 is made of conductive metal, and a plurality of grid holes 22 are formed on the walking pulley 2. The plurality of grid holes 22 are arranged around the rotation axis of the walking pulley 2, and the positions where the grid holes 22 are located are the insulating blocks.

[0034] The working principle of this embodiment:

[0035] When in use, the base 1 is connected and fixed to the monitored part, which is a bolt head or a nut, and the walking pulley 2 slides and contacts on the surface of the equipment that is against the monitored part; when the monitored part is loose, the monitored part and the surface of the equipment rotate relative to each other, so that the base 1 makes a circular motion around the monitored part. During the circular motion of the base 1, the walking pulley 2 slides and rotates relative to the surface of the equipment, and the trigger area is driven by the walking pulley 2 to rotate, so that the two conductive probes 3 repeatedly switch between the circuit state and the circuit-breaking state, and the information storage module 7 outputs the recorded number of state switching between the two conductive probes 3 to the remote monitoring center. The remote monitoring center calculates the angle through which the walking pulley 2 rotates based on the number of state switching between the two conductive probes 3, and then calculates the arc length through which the circular motion of the base 1 passes, thereby calculating the angle through which the monitored part rotates, thereby realizing remote monitoring of the loose state of the monitored part. Through this design, the looseness status of fasteners such as bolts and nuts can be detected in real time without the need for manual inspection on site, which greatly reduces the difficulty of inspection and maintenance.

[0036] like Figures 1 to 4 As shown, this embodiment further includes a friction pad 8, which is an arc-shaped structure, and the base 1 slides in contact with the friction pad 8 through the walking pulley 2. When in use, the friction pad 8 is pasted and fixed on the surface of the equipment, and the friction pad 8 is used to enhance the friction effect between the walking pulley 2 and the surface of the equipment to prevent the walking pulley 2 from slipping during the sliding process and affecting the monitoring accuracy.

[0037] like Figure 4 , Figure 5 and Figure 6 As shown, the outer periphery of the walking pulley 2 is a sawtooth structure, and the sawtooth arrangement direction of the sawtooth structure is arranged around the rotation axis of the walking pulley 2. Through such a structure, the friction effect between the walking pulley 2 and the equipment surface can be further enhanced.

[0038] like Figure 4 , Figure 5 and Figure 6As shown, this embodiment also includes a sliding rod 4, a first elastic member 5 and a monitoring mechanism 6; the sliding rod 4 is slidably arranged on the base 1, and the sliding direction of the sliding rod 4 is arranged along its length direction. One end of the sliding rod 4 is rotatably mounted with the walking pulley 2, and the rotation axis of the walking pulley 2 is perpendicular to the length direction of the sliding rod 4. A first elastic member 5 is compressed and arranged between the sliding rod 4 and the base 1, and the first elastic member 5 is a compression spring, so that the sliding rod 4 has a movement tendency to slide in the direction of the walking pulley 2; the monitoring mechanism 6 is arranged on the base 1, and the monitoring mechanism 6 is used to monitor the sliding position of the sliding rod 4; the information storage module 7 is electrically connected to the monitoring mechanism 6, and the information storage module 7 is used to record the monitoring information of the monitoring mechanism 6. When in use, the walking pulley 2 rests on the surface of the equipment and drives the sliding rod 4 to slide and compress the first elastic member 5. At this time, the sliding position of the sliding rod 4 is set to the initial state, and the base 1 is connected and fixed to the monitored part to lock the sliding rod 4; when the part where the monitored part is connected to the equipment is broken (that is, if the monitored part is a bolt head, the threaded part of the bolt itself is broken; if the monitored part is a nut, the threaded part of the stud or bolt connected to the nut is broken), the monitored part will be separated from the surface of the equipment, so that the base 1 is driven away from the surface of the equipment, and the sliding rod 4 slides under the action of the first elastic member 5, so that the monitoring mechanism 6 is triggered, and the information storage module 7 outputs the recorded triggering information of the monitoring mechanism 6 to the remote monitoring center, thereby realizing real-time monitoring of the fracture state of fasteners such as bolts and nuts. In addition, a limiting slide hole 44 is formed on the sliding rod 4, and the limiting slide hole 44 is an elongated hole. The length direction of the limiting slide hole 44 is arranged along the length direction of the sliding rod 4; a limiting member 20 is installed on the base 1, and the limiting member 20 is inserted into the limiting slide hole 44, so as to limit the range of movement of the sliding rod 4 and prevent the sliding rod 4 from detaching from the base 1.

[0039] like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, a first slideway 122 is formed on the base 1, and the first slideway 122 is perpendicular to the length direction of the sliding rod 4; a second slideway 41 is formed on the sliding rod 4, and the second slideway 41 is parallel to the first slideway 122, and a blocking convex portion 42 is formed on the side of the second slideway 41 close to the walking pulley 2; the monitoring mechanism 6 includes a trigger rod 61, a second elastic member 62, a conductive member 63 and two conductive terminals 64; the two conductive terminals 64 are both electrically connected to the information storage module 7; the conductive member 63 is provided on the trigger rod 61, and a positioning convex portion 611 is formed on the trigger rod 61, and the trigger rod 61 can be slidably inserted in the first slideway 122 and the second slideway 41 at the same time, and the sliding direction of the trigger rod 61 is set along its length direction, and the trigger rod 61 is positioned by the first slideway 122 along the length direction of the sliding rod 4. The trigger rod 61 can move relative to the second slideway 41 along the length direction of the sliding rod 4. The trigger rod 61 slides to switch the conductive member 63 between the conductive state in contact with the two conductive terminals 64 and the disconnected state in which the conductive member 63 is separated from the two conductive terminals 64. The information storage module 7 is also used to record the state of the two conductive terminals 64. The second elastic member 62 is compressed and arranged between the trigger rod 61 and the base 1. The second elastic member 62 is a compression spring, so that the trigger rod 61 has a movement tendency to drive the conductive member 63 to contact the two conductive terminals 64. In the initial state: the trigger rod 61 and the sliding rod 4 slide relatively so that the positioning protrusion 611 and the blocking protrusion 42 are abutted against each other, and the trigger rod 61 is locked in cooperation with the second elastic member 62, so that the conductive member 63 and the two conductive terminals 64 remain in a disconnected state. When the part connected to the monitored part and the equipment is broken, the sliding rod 4 slides under the action of the first elastic member 5, so that the blocking protrusion 42 is separated from the positioning protrusion 611, and the trigger rod 61 slides under the action of the second elastic member 62 so that the conductive member 63 contacts the two conductive terminals 64 and switches to the conductive state, and the information storage module 7 receives the power-on signal and records the trigger information, and the information storage module 7 outputs the recorded trigger information to the remote monitoring center, so as to achieve real-time monitoring of the fracture state of fasteners such as bolts and nuts. When resetting the fastener loosening detection device, the trigger rod 61 is pushed to return to the initial position to compress the second elastic member 62 so that the conductive member 63 switches to the disconnected state, and then the walking pulley 2 is pushed to drive the sliding rod 4 to compress the first elastic member 5 until the blocking protrusion 42 of the sliding rod 4 abuts against the positioning protrusion 611 of the trigger rod 61 to cooperate with the second elastic member 62 to lock the trigger rod 61. In addition, a mounting recess 612 is formed on the trigger rod 61 , and the trigger rod 61 is slidably disposed in the second slideway 41 through the mounting recess 612 , thereby limiting the range of motion of the trigger rod 61 and preventing the trigger rod 61 from being separated from the sliding rod 4 .In this embodiment, two contact springs that are connected to each other are provided on the conductive member 63. When the conductive member 63 is in the conductive state, the two contact springs are in contact and conductive with the two conductive terminals 64 one by one. In actual use, the conductive member 63 may also be provided with only one contact spring. When the conductive member 63 is in the conductive state, the contact spring is between the two conductive terminals 64 and is in contact and conductive with the two conductive terminals 64 at the same time.

[0040] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a first locking hole 121 is formed on the base 1, a second locking hole 43 is formed on the sliding rod 4, and a third locking hole 21 is formed on the walking pulley 2. In the initial state, the hole axis of the first locking hole 121, the hole axis of the second locking hole 43, and the hole axis of the third locking hole 21 are collinear; and a locking pin (the locking pin is not shown in the drawings) is also included, and the locking pin is detachably inserted into the first locking hole 121, the second locking hole 43 and the third locking hole 21 at the same time, so that the sliding rod 4, the walking pulley 2 and the base 1 are relatively fixed. Before connecting and assembling the present fastener loosening detection device with the monitored part, the sliding rod 4, the walking pulley 2, and the trigger rod 61 are reset to the initial state, and then the locking pin is inserted into the first locking hole 121, the second locking hole 43, and the third locking hole 21 to lock the sliding rod 4 and the walking pulley 2 to facilitate the assembly of the present fastener loosening detection device with the monitored part; after the assembly is completed, the locking pin is removed and the present fastener loosening detection device will be able to work normally.

[0041] like Figure 4 and Figure 7 As shown, this embodiment also includes a transceiver antenna 9, which is arranged on the base 1 and electrically connected to the information storage module 7. The transceiver antenna 9 is used for wireless data transmission and reception between the information storage module 7 and the external read-write device, and supplies power to the information storage module 7. When in use, the fastener loosening detection device is used in conjunction with the external read-write device, and the external read-write device is electrically connected to the remote monitoring center. The transceiver antenna 9 of the fastener loosening detection device supplies power to the information storage module 7 by receiving electromagnetic waves from the external read-write device, and sends the recorded information of the information storage module 7 to the external read-write device in the form of electromagnetic waves to realize wireless data transmission and reception, and the external read-write device transmits the received recorded information to the remote monitoring center. Since there are a large number of fasteners such as bolts and nuts installed on large equipment, there are a large number of fastener loosening detection devices installed. The external read-write device transmits recorded information and supplies power to multiple nearby fastener loosening detection devices through electromagnetic waves, which can simplify the transmission line between the remote monitoring center and each fastener loosening detection device, and is more convenient to install.

[0042] like Figure 1 and Figure 2 As shown, this embodiment further includes a hoop 10, which is a hexagonal closed ring structure, and a mounting ear 111 is provided on the base 1, and the mounting ear 111 is inserted into the closed ring structure of the hoop 10. When in use, the hoop 10 is sleeved on the monitored object, and the hoop 10 is tightened so that the mounting ear 111 of the base 1 is clamped between the monitored object and the hoop 10, so that the connection between the base 1 and the monitored object is more stable.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the base 1 includes a bottom plate 11 and a shell 12, the bottom plate 11 and the shell 12 enclose a mounting cavity, the shell 12 is formed with the first locking hole 121 and the first slideway 122, the shell 12 is also formed with a first mounting hole, a pulley hole 125, a reset hole, a first mounting protrusion 123 and a second mounting protrusion 124, a PCB substrate 112 is arranged on the front of the bottom plate 11, the mounting ear 111 is arranged on the back of the bottom plate 11, the bottom plate 11 is formed with a second mounting hole 113, the first locking hole 121, the first mounting hole, the second mounting hole 113, the pulley hole 125, and the reset hole are connected to the mounting cavity; the walking pulley 2, the sliding rod 4, the first elastic member 5, the trigger rod 61, and the second elastic member 6 2, the conducting member 63, the two conductive probes 3, the two conductive terminals 64, the information storage module 7 and the transceiver antenna 9 are all in the installation cavity, the first elastic member 5 is compressed and arranged between the first installation protrusion 123 and the sliding rod 4, the second elastic member 62 is compressed and arranged between the second installation protrusion 124 and the trigger rod 61, the walking pulley 2 is partially exposed to the outside of the base 1 through the pulley hole 125, one end of the trigger rod 61 is exposed to the outside of the base 1 through the reset hole for easy reset operation, one end of the limit member 20 is arranged through the first installation hole, the limit slide hole 44 and the second installation hole 113 in sequence, and the two conductive probes 3, the two conductive terminals 64, the information storage module 7 and the transceiver antenna 9 are arranged on the PCB substrate 112. Through such a design, the dustproof and waterproof performance of the fastener loosening detection device can be improved.

[0044] like Figure 4 and Figure 7 As shown, the information storage module 7 includes a first recording chip 71 and a second recording chip 72. The first recording chip 71 and the second recording chip 72 are both chips with a single output channel. The first recording chip 71 is electrically connected to two conductive probes 3, and the second recording chip 72 is electrically connected to two conductive terminals 64. The first recording chip 71 and the second recording chip 72 are both electrically connected to the transceiver antenna 9.

[0045] Example 2

[0046] like Figure 8 This is a fastener loosening detection device of Example 2. The difference between Example 2 and Example 1 is that the information storage module includes and only has one third recording chip 73. The third recording chip 73 is a chip with multiple output channels. The third recording chip 73 is electrically connected to two conductive probes 3, two conductive terminals 64, and a transceiver antenna 9. The difference between Example 2 and Example 1 is that the information storage module 7 selects different chip models. In actual production, the implementation plan can be selected according to the inventory or purchase price of different types of chips.

[0047] Example 3

[0048] like Fig. 9 and Fig.10 This is a fastener loosening detection device of embodiment 3. The difference between embodiment 3 and embodiment 1 is that: the grid hole 22 of the walking pulley 2 is filled with an insulator 23, and the insulator 23 is flush with the hole opening of the grid hole 22 on the triggering area side. The conductive contact end of the conductive probe 3 has elastic potential energy to extend and retract away from the conductive probe 3. When in use, the conductive contact end of the conductive probe 3 is compressed against the walking pulley 2, thereby ensuring that the conductive contact end of the conductive probe 3 is in full contact with the triggering area of ​​the walking pulley 2; by setting the insulator 23, the walking pulley 2 can make the connection between the conductive block and the insulating block of the walking pulley 2 a flat structure, reducing the resistance of the conductive contact end of the conductive probe 3 when the walking pulley 2 rotates.

[0049] Example 4

[0050] like Fig.11 and Fig.12 This is a fastener loosening detection device of embodiment 4. The difference between embodiment 4 and embodiment 3 is that: the walking pulley 2 is made of insulating material, a conductive metal surface 24 is provided on one side of the walking pulley 2, and a plurality of hollow structures 241 are formed on the conductive metal surface 24. The plurality of hollow structures 241 are arranged around the rotation axis of the walking pulley 2, and the position where the hollow structures 241 are located is the insulating block. By forming the conductive block and the insulating block by the conductive metal surface 24, the production cost of the walking pulley 2 can be reduced.

[0051] The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications, combinations and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A fastener loosening detection device, characterized in that: It comprises a base, a walking pulley, an information storage module and two conductive probes; the walking pulley is rotatably arranged on the base, a trigger area is formed on one side surface of the walking pulley, a plurality of conductive blocks and a plurality of insulating blocks are arranged on the trigger area, the conductive blocks and the insulating blocks are evenly and alternately arranged around the rotation axis of the walking pulley, and the conductive blocks are mutually conductive; the information storage module and the two conductive probes are both arranged on the base, the two conductive probes are both electrically connected to the information storage module, the conductive contact ends of the two conductive probes are arranged on the trigger area of ​​the walking pulley, the walking pulley is rotated so that the conductive contact ends of the two conductive probes are switched between being in the passage state of the conductive block at the same time and being in the disconnection state of the insulating block at the same time; the information storage module is used to record the number of state switching information between the two conductive probes.

2. A fastener loosening detection device as claimed in claim 1, characterized in that: It also includes a friction pad, which is an arc-shaped structure, and the base body slides in contact with the friction pad via a walking pulley.

3. A fastener loosening detection device as claimed in claim 1, characterized in that: The outer periphery of the walking pulley is a sawtooth structure, and the sawtooth arrangement direction of the sawtooth structure is arranged around the rotation axis of the walking pulley.

4. A fastener loosening detection device as claimed in claim 1, 2 or 3, characterized in that: The walking pulley is made of conductive metal and is formed with a plurality of grid holes, which are arranged around the rotation axis of the walking pulley, and the positions of the grid holes are the insulating blocks.

5. A fastener loosening detection device as claimed in claim 4, characterized in that: The grid holes of the walking pulley are filled with insulators, which are flush with the openings of the grid holes on the side of the triggering area.

6. A fastener loosening detection device as claimed in claim 1, 2 or 3, characterized in that: The walking pulley is made of insulating material, and a conductive metal surface is arranged on one side of the walking pulley. A plurality of hollow structures are formed on the conductive metal surface. The plurality of hollow structures are arranged around the rotation axis of the walking pulley, and the position where the hollow structures are located is the insulating block.

7. A fastener loosening detection device as claimed in claim 1, characterized in that: It also includes a sliding rod, a first elastic member and a monitoring mechanism; the sliding rod is slidably arranged on the base, the sliding direction of the sliding rod is arranged along its length direction, one end of the sliding rod is rotatably mounted with the walking pulley, the rotation axis of the walking pulley is perpendicular to the length direction of the sliding rod, and a first elastic member is arranged between the sliding rod and the base, so that the sliding rod has a movement tendency to slide in the direction of the walking pulley; the monitoring mechanism is arranged on the base, and the monitoring mechanism is used to monitor the sliding position of the sliding rod; the information storage module is electrically connected to the monitoring mechanism, and the information storage module is used to record the monitoring information of the monitoring mechanism.

8. A fastener loosening detection device as claimed in claim 7, characterized in that: A first slide is formed on the base, and the first slide is perpendicular to the length direction of the sliding rod; a second slide is formed on the sliding rod, and the second slide is parallel to the first slide, and a blocking convex portion is formed on the side of the second slide close to the walking pulley; the monitoring mechanism includes a trigger rod, a second elastic member, a conductive member and two conductive terminals; the two conductive terminals are both electrically connected to the information storage module; the conductive member is provided on the trigger rod, and a positioning convex portion is formed on the trigger rod, the trigger rod can be slidably inserted in the first slide and the second slide at the same time, the sliding direction of the trigger rod is set along its length direction, the trigger rod is positioned by the first slide along the length direction of the sliding rod, and the trigger rod is The rod can move relative to the second slideway along the length direction of the sliding rod, and the trigger rod slides to switch the conductive member between the conductive state in contact with the two conductive terminals and the disconnected state in which the conductive member is separated from the two conductive terminals; the information storage module is also used to record the state of the two conductive terminals; the second elastic member is arranged between the trigger rod and the base, so that the trigger rod has a movement tendency to drive the conductive member to contact the two conductive terminals; in the initial state: the trigger rod and the sliding rod slide relative to each other so that the positioning protrusion and the blocking protrusion are abutted against each other, and the trigger rod is locked in cooperation with the second elastic member, so that the conductive member and the two conductive terminals remain in a disconnected state.

9. A fastener loosening detection device according to claim 7 or 8, characterized in that: The base is formed with a first locking hole, and the sliding rod is formed with a second locking hole; a locking pin is also included, and the locking pin is detachably inserted into the first locking hole and the second locking hole at the same time, so that the sliding rod is relatively fixed to the base.

10. A fastener loosening detection device as claimed in claim 1, characterized in that: It also includes a transceiver antenna, which is arranged on the substrate and electrically connected to the information storage module. The transceiver antenna is used for wireless data transmission between the information storage module and an external reading and writing device, and supplies power to the information storage module.

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