Thread and torque detection device

Abstract

The invention relates to the technical field of bolt detection, and particularly discloses a thread and torque detection device which comprises a mounting seat, a slide way is formed in the top surface of the mounting seat, a sliding shaft seat is slidably mounted in the slide way, a to-be-detected screw rod is rotatably mounted on the side of the sliding shaft seat, and a detection assembly is further included. The detection assembly is used for detecting the thread and torque of the to-be-detected screw rod, and the driving assembly is used for driving the to-be-detected screw rod to be screwed in or out of the detection assembly. According to the invention, whether the quality of two sides of a thread is qualified or not can be detected through the detection assembly when the to-be-detected screw is screwed in and screwed out, the situation of single-side failure of the thread is avoided, meanwhile, the torque difference caused by different stress positions when the screw is screwed in or screwed out is measured, the detection depth of the device on the thread is improved, and the detection efficiency is improved. And the application range and the specification standard of qualified products are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of bolt detection, in particular to a thread and torque detection device. Background Art

[0002] Bolts are a common fastener used to connect or fix two or more parts. Bolts play a role of connection and fixing in many key structures and mechanical systems. Their performance is directly related to the stability and safety of the structure. Therefore, bolt detection is an important link to ensure its safety, reliability and compliance with design requirements.

[0003] For example, Chinese patent number: CN116698130B discloses a thread and torque detection device and method, which relates to the field of bolt detection technology, including a base plate, a thread detection component is installed on the top of one end of the base plate, a torque detection component is arranged on the top of the base plate, the torque detection component is arranged on the side and below of the thread detection component, a sliding component is installed on the bottom of one end of the torque detection component, and a clamping component is installed on the top of the base plate. In the thread and torque detection device, during the sliding process, the detection needle will swing along the direction of the thread, and the slider will slide accordingly. The damping telescopic rod assists in providing sliding space and reset. During the sliding displacement of the detection needle, the displacement sensor connected to it can monitor and record the amplitude of the swing, and transmit the monitored data to the display screen through image magnification processing. At the same time, the laser detector can monitor through laser, thereby improving the accuracy of detection.

[0004] However, the above method can only detect the torque of the bolt in one direction, and the stress generated when the screw is screwed in and out of the nut is on both sides of the thread, that is, the torque when the screw is screwed in or out of the nut is not the same. The torque required for the screw to screw out the nut is too large or the screw cannot be screwed out of the nut due to damage to the thread on one side, which may affect the detachability of the device when the screw is used in a detachable device. Summary of the invention

[0005] The object of the present invention is to provide a thread and torque detection device to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a thread and torque detection device, comprising a mounting seat, a slideway is provided on the top surface of the mounting seat, a sliding shaft seat is slidably installed in the slideway, and a screw to be tested is rotatably installed on the side of the sliding shaft seat;

[0007] It also includes a detection component, which is used to detect the thread and torque of the screw to be tested;

[0008] The detection component also includes a driving component, which is used to drive the screw to be detected to rotate into or out of the detection component.

[0009] Preferably, the driving assembly includes a motor fixedly mounted on the top surface of the mounting seat, a main shaft end portion of the motor is fixedly connected to a driving shaft passing through the sliding shaft seat, and the driving shaft is rotatably connected to the penetration point of the sliding shaft seat, a driving gear is fixedly mounted on the outer wall of the driving shaft located in the sliding shaft seat, a driven gear meshing with the driving gear is also rotatably mounted in the sliding shaft seat, one end of the rotating shaft of the driven gear passing through the sliding shaft seat is fixedly connected to a limiting screw, and a limiting threaded tube for the limiting screw to be screwed in or out is fixedly mounted on the top surface of the mounting seat through a bracket.

[0010] Preferably, the detection component includes a detection threaded tube fixedly mounted on the top surface of the mounting seat by a bracket, and a torque detection part is provided between the other end of the rotating shaft of the driven gear passing through the sliding shaft seat and the screw to be tested, and the torque detection part is used to measure the torque required for the screw to be tested when it is screwed into the detection threaded tube.

[0011] Preferably, the torque detection part includes an elastic shaft fixedly mounted on the side end of the driven gear shaft, two torsion rings are fixedly mounted at both ends of the elastic shaft, an elastic conductive layer is fixedly mounted between the two torsion rings, and the elastic conductive layer is attached to the outer wall of the elastic shaft, and conductive rings are rotatably mounted in grooves opened on the outer walls of the two torsion rings, the two conductive rings are connected to an external closed circuit through a passage formed by electric wires and the elastic conductive layer, and the side end of the elastic shaft is fixedly connected to the screw to be measured.

[0012] Preferably, the torque detection part includes a fixed shaft fixedly installed on the side end of the driven gear shaft, a conductive tube is fixed to the outer wall of the fixed shaft, and torsion rings are installed on the outer walls of the fixed shaft near both ends. The torsion ring close to the driven gear is rotatably sleeved on the conductive tube and fixedly connected to the sliding shaft seat, the torsion ring close to the screw to be measured is fixedly connected to the fixed shaft and fixedly connected to one end of the conductive tube, and power-carrying rings are rotatably installed in the grooves of the outer walls of the two torsion rings, a torsion spring is fixedly connected between the two torsion rings, and the two power-carrying rings are connected to an external closed circuit through a passage formed by the electric wire and the conductive tube, and the side end of the fixed shaft is fixedly connected to the screw to be measured.

[0013] Preferably, a locking ring is fixedly installed on the side end of the elastic shaft, and a plurality of sliding grooves are opened on the side wall of the locking ring, a limit block is slidably installed in each of the sliding grooves, a bevel gear is rotatably installed in the empty groove in the locking ring, a vortex ring is fixedly installed on one end of the bevel gear, and a wedge block that can slide in the vortex ring is fixedly installed on the side wall of each limit block.

[0014] Preferably, a rotating rod is rotatably mounted in the through hole formed in the outer wall of the locking ring, the end of the rotating rod is provided with teeth that can mesh with the bevel gear, and a rotating handle is fixedly mounted on the other end of the rotating rod.

[0015] Preferably, a sleeve is coaxially fixedly installed on the side of the locking ring, a connecting piece is slidably installed in the sleeve, a cavity is opened inside the connecting piece, two semicircular holes are opened on the inner wall of the sleeve, two locking blocks that can be inserted into the semicircular holes are slidably installed in the cavity, a spring is fixedly connected between the two locking blocks, a cross bar is axially slidably installed inside the connecting piece, and the cross bar and the outer walls of the two locking blocks are rotatably connected with a connecting rod, one end of the cross bar is fixedly connected to a sleeve rod, a locking portion for fixing the position of the sleeve rod is provided in the sleeve rod, and a fan-shaped groove for the sleeve rod to move is opened on the outer wall of the sleeve.

[0016] Preferably, the locking portion includes a limiting rod slidably installed in the sleeve rod, the sleeve rod is provided with an annular groove, the outer wall of the limiting rod located in the annular groove is fixedly installed with a circular ring that can slide in the annular groove, and a tension spring is provided between the circular ring and the bottom wall of the annular groove, and the cavity is also provided with a slot for the limiting rod to be embedded.

[0017] Preferably, the thread length in the limiting threaded tube is greater than the thread length in the detecting threaded tube, and the excess length is less than the sliding distance of the connecting piece in the sleeve.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention can detect whether the quality of both sides of the thread is qualified by detecting the screw to be tested when the detection component is screwed in and out, thereby avoiding the failure of one side of the thread. At the same time, the torque difference caused by the different stress positions when the screw is screwed in or out is measured, thereby improving the detection depth of the device for the thread and enhancing the use scope and specification standards of qualified products.

[0020] 2. The present invention adopts a limit screw and a limit threaded tube corresponding to the specifications of the screw to be tested, so that the rotation angle and displacement of the screw to be tested when it is screwed into the detection component can be adapted to the screw to be tested, thereby avoiding insufficient or excessive angular velocity and displacement when the screw to be tested is screwed into the detection component, and additionally increasing the axial stress and rotational friction on the screw to be tested, which not only easily damages the outer threads of the screw to be tested, but also distorts the torque detection result due to the increase in stress and friction, thereby improving the torque measurement accuracy of the screw to be tested and reducing the load on the device and the screw to be tested, thereby increasing the service life of the device and the axial stress resistance of the screw to be tested.

[0021] 3. The present invention can detect the torque of the screw to be tested when it is screwed into the testing threaded tube in real time by transmitting the torque of the screw to be tested to the elastic shaft and measuring the change in the current passing through the elastic conductive layer. Since the stress on the outer thread of the screw to be tested increases with the number of turns of the thread, and the increase should be linear, if a fluctuation beyond the allowable range occurs somewhere in the torque line graph, it indicates that the thread corresponding to the torque here may have quality problems and further testing is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a side cross-sectional view of the first embodiment of the present invention;

[0024] Figure 3 It is a side cross-sectional view of the second embodiment of the present invention;

[0025] Figure 4 It is a cross-sectional view of the three-dimensional structure of the first embodiment of the present invention;

[0026] Figure 5 It is a three-dimensional structural cross-sectional view of the second embodiment of the present invention;

[0027] Figure 6 is a cross-sectional view of the three-dimensional structure of the torque detection part of the present invention;

[0028] Figure 7 An exploded view of the locking ring and related structures in the present invention;

[0029] Figure 8 It is a three-dimensional structural cross-sectional view of the connecting member and its related structures in the present invention;

[0030] Fig. 9 It is a schematic diagram of the force position of the thread of the present invention.

[0031] In the figure: 1. mounting seat; 2. slideway; 3. sliding shaft seat; 4. driving shaft; 5. motor; 6. driving gear; 7. driven gear; 8. limiting screw; 9. limiting threaded tube; 10. elastic shaft; 11. connecting piece; 12. sleeve; 13. locking ring; 14. screw to be tested; 15. testing threaded tube; 16. torsion ring; 17. conductive ring; 18. elastic conductive layer; 19. torsion spring; 20. fixed shaft; 21. sliding groove; 22. limiting block; 23. vortex ring; 24. bevel gear; 25. cavity; 26. connecting rod; 27. sleeve rod; 28. limiting rod; 29. ​​locking block; 30. spring; 31. power ring; 32. conductive tube. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 9 The present invention provides a technical solution: a thread and torque detection device, comprising a mounting seat 1, a slideway 2 is provided on the top surface of the mounting seat 1, a sliding shaft seat 3 is slidably installed in the slideway 2, and a screw rod 14 to be tested is rotatably installed on the side of the sliding shaft seat 3;

[0034] It also includes a detection component, which is used to detect the thread and torque of the screw rod 14 to be tested;

[0035] The detection assembly also includes a driving assembly, which is used to drive the screw rod 14 to be detected to rotate into or out of the detection assembly.

[0036] When the device is in use, the screw rod 14 to be tested is first rotated and installed on the side wall of the sliding shaft seat 3, and then the screw rod 14 to be tested is driven to be screwed into the detection component through the driving component. At the same time, the detection component is used to detect the thread and torque of the screw rod 14 to be tested, and the data is recorded. Then, the driving component is driven to drive the screw rod 14 to be tested to screw out of the detection component, and the detection component is continued to be used to detect the thread and torque of the screw rod 14 to be tested, thereby completing the detection of the specifications and torque on both sides of the thread.

[0037] By detecting the screw rod 14 to be tested when it is screwed in and out, the quality of both sides of the thread can be detected to avoid the failure of one side of the thread. At the same time, the torque difference caused by the different stress positions when the screw rod is screwed in or out can be measured. For details, see Fig. 9 When the screw is screwed in, the stress on the screw 14 to be tested is mainly concentrated at the position marked at b in the figure, and when the screw is screwed out, the stress on the screw 14 to be tested is mainly concentrated at the position marked at a in the figure. The prior art usually only detects the stress at the position marked at b. If the thread at a is damaged (such as dents or cracks, etc.), it cannot be accurately detected. By increasing the detection of the stress on the screw, the detection depth of the device for the thread is improved, and the use range and specification standards of qualified products are enhanced.

[0038] Furthermore, the driving assembly includes a motor 5 fixedly mounted on the top surface of the mounting seat 1, a main shaft end of the motor 5 is fixedly connected to a driving shaft 4 that passes through the sliding shaft seat 3, and the driving shaft 4 is rotatably connected to the penetration point of the sliding shaft seat 3, a driving gear 6 is fixedly mounted on the outer wall of the driving shaft 4 located in the sliding shaft seat 3, and a driven gear 7 that meshes with the driving gear 6 is also rotatably mounted in the sliding shaft seat 3, and one end of the driven gear 7 that passes through the sliding shaft seat 3 is fixedly connected to a limiting screw 8, and a limiting threaded tube 9 that can allow the limiting screw 8 to be screwed in or out is fixedly mounted on the top surface of the mounting seat 1 through a bracket.

[0039] According to the above embodiment, a specific embodiment of a driving assembly is provided. When the motor 5 drives the driving shaft 4 and the driving gear 6 to rotate forward together, the driven gear 7 and the limit screw 8 will be driven to rotate together. At this time, the limit screw 8 rotates in the limit threaded tube 9, screws out of the limit threaded tube 9 and pushes the sliding shaft seat 3 to slide on the slideway 2. For details, see Figure 1 At this time, the screw rod 14 to be tested on the left side of the sliding shaft seat 3 rotates forward to the left side together and is screwed into the detection component. The detection component is used to measure the specifications of the screw rod 14 to be tested and the torque required for screwing in. When the screw rod 14 to be tested completely enters the detection component and cannot continue to rotate, the motor 5 stops rotating. At this time, a torque line graph when the screw rod 14 to be tested is screwed into the detection component can be drawn according to the measurement result of the torque. Then the motor 5 is reversed to make the limit screw 8 screw into the limit threaded tube 9, and drive the screw rod 14 to be tested to be screwed out of the detection component together. At the same time, the detection component is used to detect the torque required for the screw rod 14 to be tested to be screwed out, thereby completing the measurement of the torque required for the screw rod 14 to be tested to be screwed in and out.

[0040] In this way, by adopting the limit screw 8 and the limit threaded tube 9 corresponding to the specifications of the screw 14 to be tested, the rotation angle and displacement of the screw 14 to be tested when it is screwed into the detection component can be adapted to the screw 14 to be tested, thereby avoiding insufficient or excessive angular velocity and displacement when the screw 14 to be tested is screwed into the detection component, and additionally increasing the axial stress and rotational friction on the screw 14 to be tested, which not only easily damages the outer threads of the screw 14 to be tested, but also distorts the torque detection result due to the increase in stress and friction, thereby improving the torque measurement accuracy of the screw 14 to be tested, reducing the load on the device and the screw 14 to be tested, and improving the service life of the device and the axial stress resistance of the screw 14 to be tested.

[0041] Furthermore, the detection component includes a detection threaded tube 15 fixedly mounted on the top surface of the mounting seat 1 through a bracket, and a torque detection part is provided between the other end of the rotating shaft of the driven gear 7 passing through the sliding shaft seat 3 and the screw rod 14 to be tested. The torque detection part is used to measure the torque required for the screw rod 14 to be tested when it is screwed into the detection threaded tube 15.

[0042] According to the above embodiment, a specific embodiment of a detection component is provided. When the limit screw 8 drives the screw 14 to be tested to rotate forward, the screw 14 to be tested begins to be screwed into the detection threaded tube 15. By observing whether the screw 14 to be tested can be screwed into the detection threaded tube 15, and cooperating with the torque required for the screw 14 to be tested to be screwed in, it can be judged whether the screw 14 to be tested is qualified. If the screw 14 to be tested cannot be screwed in normally, it is judged as unqualified. If the screw 14 to be tested can be screwed in normally, the next step of torque detection is entered. If the torque detection result is greater than the qualified standard interval range, it indicates that the thread of the screw 14 to be tested may have defects such as burrs. If the torque detection result is less than the qualified standard interval range, it indicates that the thread depth outside the screw 14 to be tested is insufficient. If a large axial pulling force is encountered, the screw 14 to be tested may be pulled out of the nut.

[0043] Subsequently, the screw rod 14 to be tested is unscrewed out of the testing threaded tube 15 to detect the strength and integrity of the other side of the thread of the screw rod 14 to be tested. If the screw rod 14 to be tested cannot be normally unscrewed out of the testing threaded tube 15, then the surface thread on the other side has a major defect. At the same time, the torque required for unscrewing the screw rod 14 to be tested is continued to be tested in cooperation with the torque detection unit. If the torque detection result is greater than the qualified standard interval range, it indicates that there are defects such as unevenness on the other side of the thread. If the torque detection result is less than the qualified standard interval range, it indicates that there are defects such as cracks or pits on the other side of the thread.

[0044] In this way, by screwing the screw 14 to be tested into the detection threaded tube 15, the pitch of the external thread of the screw 14 to be tested can be detected, and in conjunction with the subsequent torque detection, it can be determined whether both sides of the external thread of the screw 14 to be tested are qualified, thereby avoiding the difficulty of the thread being unable to be disassembled during use due to one side of the thread being qualified and the other side being unqualified.

[0045] Embodiment 1, according to the above embodiment, provides a specific embodiment of a torque detection unit:

[0046] The torque detection part includes an elastic shaft 10 fixedly installed on the side end of the rotating shaft of the driven gear 7, two torsion rings 16 are fixedly installed at both ends of the elastic shaft 10, an elastic conductive layer 18 is fixedly installed between the two torsion rings 16, and the elastic conductive layer 18 is attached to the outer wall of the elastic shaft 10, and conductive rings 17 are rotatably installed in the grooves opened on the outer walls of the two torsion rings 16. The two conductive rings 17 are connected to the external closed circuit through the passage formed by the electric wire and the elastic conductive layer 18, and the side end of the elastic shaft 10 is fixedly connected to the screw 14 to be tested.

[0047] When the driven gear 7 rotates, the elastic shaft 10 is driven to rotate together, and the screw rod 14 to be tested is driven to rotate together through the elastic shaft 10. At this time, the elastic shaft 10 is twisted by the stress transmitted by the screw rod 14 to be tested. Figure 4The twisting of the elastic shaft 10 causes relative rotation between the torsion rings 16 on both sides, pulling the elastic conductive layer 18 to twist. Since the elastic conductive layer 18 is composed of multiple elastic conductive belts, the length of the elastic conductive belt is extended, and its resistance will change with the increase of the extended length. At this time, the torque change of the screw rod 14 to be tested can be measured by measuring the current of the external closed circuit, thereby completing the detection of the torque required when the screw rod 14 to be tested is screwed into the detection threaded tube 15.

[0048] In this way, by transmitting the torque of the screw 14 to be tested to the elastic shaft 10 and measuring the change in current passing through the elastic conductive layer 18, the torque of the screw 14 to be tested when it is screwed into the detection threaded tube 15 can be detected in real time. Since the stress on the outer thread of the screw 14 to be tested will increase with the increase in the number of turns of the thread, and the increase should be linear, if a fluctuation occurs somewhere on the torque line graph that exceeds the allowable range, it indicates that the thread corresponding to the torque here may have quality problems and further testing is required.

[0049] Embodiment 2 provides a specific implementation of a second torque detection unit according to the above implementation:

[0050] Furthermore, the torque detection part includes a fixed shaft 20 fixedly installed on the side end of the rotating shaft of the driven gear 7, a conductive tube 32 is fixed on the outer wall of the fixed shaft 20, and torsion rings 16 are installed on the outer walls of the fixed shaft 20 near both ends. The torsion ring 16 near the driven gear 7 is rotatably sleeved on the conductive tube 32 and fixedly connected to the sliding shaft seat 3, the torsion ring 16 near the screw rod 14 to be measured is fixedly connected to the fixed shaft 20 and to one end of the conductive tube 32, and power-on rings 31 are rotatably installed in the grooves on the outer walls of the two torsion rings 16, a torsion spring 19 is fixedly connected between the two torsion rings 16, the two power-on rings 31 are connected to the external closed circuit through the passage formed by the electric wire and the conductive tube 32, and the side end of the fixed shaft 20 is fixedly connected to the screw rod 14 to be measured.

[0051] When the driven gear 7 rotates, it will drive the fixed shaft 20 to rotate together, and drive the screw rod 14 to be tested to rotate together with the torsion ring 16 fixed on the side end of the fixed shaft 20 through the fixed shaft 20. Since the torsion ring 16 close to the driven gear 7 is rotated and sleeved on the conductive tube 32, and is fixedly connected to the sliding shaft seat 3, relative rotation occurs between the two torsion rings 16, and the torsion spring 19 is twisted. Since the relative distance between the two torsion rings 16 does not change, the torsion spring 19 moves closer to and fits the outer wall of the conductive tube 32 when twisted, so that the resistance of the conductive tube 32 increases (that is, the current passing through the conductive tube 32 will decrease as the contact area between the torsion spring 19 and the conductive tube 32 increases when twisted). Therefore, the corresponding torque can be calculated by detecting the current flowing through the conductive tube 32, thereby completing the detection of the torque of the screw rod 14 to be tested in the above text.

[0052] In this way, through the twisting of the torsion spring 19 and the fit with the conductive tube 32, the change of the torque of the screw 14 to be tested can be detected through the resistance of the conductive tube 32. Moreover, since the elastic twisting range of the torsion spring 19 is much larger than the elastic twisting range of the elastic shaft 10, and the torque will increase with the increase of the number of thread turns, the torque detection part can measure the screw thread with a longer length through the torsion spring 19, while the elastic shaft 10 can only detect the screw thread with a shorter thread length. Compared with the first embodiment, the application scope of thread torque detection is increased.

[0053] Furthermore, a locking ring 13 is fixedly installed on the side end of the elastic shaft 10, and a plurality of sliding grooves 21 are opened on the side wall of the locking ring 13, and a limit block 22 is slidably installed in each sliding groove 21, and a bevel gear 24 is rotatably installed in the empty groove in the locking ring 13, and a vortex ring 23 is fixedly installed on one end of the bevel gear 24, and a wedge block that can slide in the vortex ring 23 is fixedly installed on the side wall of each limit block 22.

[0054] According to the above embodiment, it can be known that by rotating the bevel gear 24, the vortex ring 23 can be driven to rotate together, and the limit block 22 can slide in the sliding groove 21, so that the nut of the screw rod 14 to be tested is clamped into the locking ring 13, completing the fixed connection between the screw rod 14 to be tested and the elastic shaft 10 mentioned above.

[0055] Furthermore, a rotating rod is rotatably installed in the through hole formed in the outer wall of the locking ring 13 , the end of the rotating rod is provided with teeth that can mesh with the bevel gear 24 , and a rotating handle is fixedly installed at the other end of the rotating rod.

[0056] According to the above embodiment, it can be known that the bevel gear 24 can be driven to rotate by turning the handle, which reduces the difficulty of driving the bevel gear 24.

[0057] Furthermore, a sleeve 12 is coaxially fixedly installed on the side of the locking ring 13, and a connecting piece 11 is slidably installed in the sleeve 12. A cavity 25 is opened inside the connecting piece 11, and two semicircular holes are opened on the inner wall of the sleeve 12. Two locking blocks 29 that can be inserted into the semicircular holes are slidably installed in the cavity 25. A spring 30 is fixedly connected between the two locking blocks 29. A cross bar is axially slidably installed inside the connecting piece 11, and the cross bar and the outer walls of the two locking blocks 29 are rotatably connected with a connecting rod 26. A sleeve rod 27 is fixedly connected to one end of the cross bar, and a locking portion for fixing the position of the sleeve rod 27 is provided in the sleeve rod 27. The outer wall of the sleeve 12 is provided with a fan-shaped groove for the sleeve rod 27 to move.

[0058] According to the above embodiment, it can be known that when the screw rod 14 to be tested is normally screwed into the detection threaded tube 15, the sleeve rod 27 is pulled at this time so that the two connecting rods 26 pull the locking block 29 back into the cavity 25, and the position of the fixed sleeve rod 27 is fixed by the locking part, so that the rotation lock between the sleeve 12 and the connecting member 11 is released, and the elastic shaft 10 can be returned to the state before the twisting to complete the reset, thereby avoiding the twisting of the elastic shaft 10 to affect the torque detection when the screw rod 14 to be tested is screwed out of the detection threaded tube 15.

[0059] When the screw rod 14 to be tested cannot be normally screwed into the detection threaded tube 15, since the rotation of the motor 5 has not stopped, the elastic shaft 10 is further twisted. When the degree of twisting of the elastic shaft 10 is close to the elastic twisting limit of the elastic shaft 10, the locking block 29 is retracted into the cavity 25 along the semicircular hole, and the rotation lock between the sleeve 12 and the connecting piece 11 is released, so as to prevent the elastic shaft 10 from being excessively twisted and unable to recover, and the connecting piece 11 is driven by the limit screw 8 to slide in the sleeve 12, so as to complete the axial displacement compensation of the elastic shaft 10 and prevent the elastic shaft 10 from being damaged by excessive axial pressure.

[0060] In this way, the rotation lock between the sleeve 12 and the connecting member 11 can be manually or automatically released by fixing the locking limit of the sleeve rod 27 or the locking block 29, so that the elastic shaft 10 can be reset, and the distortion of the elastic shaft 10 can be avoided to affect the subsequent torque detection. At the same time, the elastic shaft 10 can be protected when the screw 14 to be tested cannot be normally screwed into the detection threaded tube 15, avoiding excessive axial pressure and radial twisting force on the elastic shaft 10, causing the elastic shaft 10 to be twisted beyond its own elastic limit to cause yield, and avoiding excessive compression of the elastic shaft 10.

[0061] It is worth mentioning that since the outer wall of the sleeve 12 is provided with a fan-shaped groove for the sleeve rod 27 to move, when the rotation lock between the sleeve 12 and the connecting member 11 is released, the connecting member 11 rotates and resets together with the elastic shaft 10, that is, when the connecting member 11 and the sleeve 12 rotate relative to each other, the sleeve rod 27 will not cause jamming, making it impossible for the connecting member 11 and the sleeve 12 to rotate relative to each other.

[0062] Furthermore, the locking portion includes a limit rod 28 slidably installed in the sleeve rod 27, a ring groove is provided in the sleeve rod 27, a circular ring that can slide in the ring groove is fixedly installed on the outer wall of the limit rod 28 located in the ring groove, and a tension spring is provided between the circular ring and the bottom wall of the ring groove, and a slot for the limit rod 28 to be embedded is also provided in the cavity 25.

[0063] According to the above embodiment, a specific embodiment of the locking part is provided. When the sleeve rod 27 moves to the top of the slot under the action of the cross bar or manual operation, the limiting rod 28 will be inserted into the slot under the action of the tension spring to complete the limiting of the sleeve rod 27 mentioned above.

[0064] Furthermore, the thread length in the limiting threaded tube 9 is greater than the thread length in the detecting threaded tube 15 , and the extra length is less than the sliding distance of the connecting member 11 in the sleeve 12 .

[0065] According to the above embodiment, it can be known that in order to avoid the test screw 14 from failing to be completely screwed into the detection threaded tube 15, it is necessary to set the thread length in the limit threaded tube 9 to be greater than the thread length in the detection threaded tube 15, and the excess length must be less than the sliding distance of the connecting piece 11 in the sleeve 12, so as to avoid the test screw 14 from moving too far and exceeding the radial displacement compensation amount of the sleeve 12 for the elastic shaft 10.

[0066] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thread and torque detection device, comprising a mounting seat (1), Features: The top surface of the mounting seat (1) is provided with a slideway (2), a sliding shaft seat (3) is slidably mounted in the slideway (2), and a screw rod (14) to be tested is rotatably mounted on the side of the sliding shaft seat (3); It also includes a detection component, which is used to detect the thread and torque of the screw rod (14) to be tested; The detection component also includes a driving component, which is used to drive the screw rod (14) to be detected to rotate into or out of the detection component.

2. The thread and torque detection device according to claim 1, Features: The driving assembly comprises a motor (5) fixedly mounted on the top surface of the mounting seat (1); a main shaft end of the motor (5) is fixedly connected to a driving shaft (4) penetrating the sliding shaft seat (3), and the driving shaft (4) is rotatably connected to the penetration point of the sliding shaft seat (3); a driving gear (6) is fixedly mounted on the outer wall of the driving shaft (4) located in the sliding shaft seat (3); a driven gear (7) meshing with the driving gear (6) is rotatably mounted in the sliding shaft seat (3); one end of the rotating shaft of the driven gear (7) passing through the sliding shaft seat (3) is fixedly connected to a limiting screw (8); and a limiting threaded tube (9) capable of being screwed in or out of the limiting screw (8) is fixedly mounted on the top surface of the mounting seat (1) through a bracket.

3. The thread and torque detection device according to claim 2, Features: The detection assembly comprises a detection threaded tube (15) fixedly mounted on the top surface of the mounting seat (1) via a bracket, and a torque detection unit is provided between the other end of the rotating shaft of the driven gear (7) passing through the sliding shaft seat (3) and the screw rod (14) to be tested, and the torque detection unit is used to measure the torque required for the screw rod (14) to be tested when the screw rod (14) to be tested is screwed into the detection threaded tube (15).

4. The thread and torque detection device according to claim 3, Features: The torque detection unit comprises an elastic shaft (10) fixedly mounted on the side end of the rotating shaft of the driven gear (7), two torsion rings (16) fixedly mounted on both ends of the elastic shaft (10), an elastic conductive layer (18) fixedly mounted between the two torsion rings (16), and the elastic conductive layer (18) is attached to the outer wall of the elastic shaft (10), and conductive rings (17) are rotatably mounted in grooves provided on the outer walls of the two torsion rings (16), and the two conductive rings (17) are connected to an external closed circuit through a passage formed by an electric wire and the elastic conductive layer (18), and the side end of the elastic shaft (10) is fixedly connected to the screw rod (14) to be tested.

5. The thread and torque detection device according to claim 3, Features: The torque detection unit comprises a fixed shaft (20) fixedly mounted on the side end of the rotating shaft of the driven gear (7); a conductive tube (32) is fixedly mounted on the outer wall of the fixed shaft (20); a torsion ring (16) is mounted on the outer wall of the fixed shaft (20) near both ends; the torsion ring (16) near the driven gear (7) is rotatably sleeved on the conductive tube (32) and is fixedly connected to the sliding shaft seat (3); the torsion ring (16) near the screw rod (14) to be measured is fixedly connected to the fixed shaft (20) and is fixedly connected to one end of the conductive tube (32); a power-on ring (31) is rotatably mounted in the grooves of the outer walls of the two torsion rings (16); a torsion spring (19) is fixedly connected between the two torsion rings (16); the two power-on rings (31) are connected to an external closed circuit through a passage formed by an electric wire and the conductive tube (32); and the side end of the fixed shaft (20) is fixedly connected to the screw rod (14) to be measured.

6. The thread and torque detection device according to claim 4, Features: A locking ring (13) is fixedly mounted on the side end of the elastic shaft (10), and a plurality of sliding grooves (21) are provided on the side wall of the locking ring (13), and a limiting block (22) is slidably mounted in each of the sliding grooves (21). A bevel gear (24) is rotatably mounted in the empty groove in the locking ring (13), and a vortex ring (23) is fixedly mounted on one end of the bevel gear (24). A wedge block capable of sliding in the vortex ring (23) is fixedly mounted on the side wall of each limiting block (22).

7. The thread and torque detection device according to claim 6, Features: A rotating rod is rotatably mounted in a through hole formed in the outer wall of the locking ring (13); teeth capable of meshing with a bevel gear (24) are provided at the end of the rotating rod; and a rotating handle is fixedly mounted at the other end of the rotating rod.

8. The thread and torque detection device according to claim 6, Features: A sleeve (12) is coaxially fixedly mounted on the side of the locking ring (13), a connecting piece (11) is slidably mounted in the sleeve (12), a cavity (25) is provided inside the connecting piece (11), two semicircular holes are provided on the inner wall of the sleeve (12), two locking blocks (29) which can be inserted into the semicircular holes are slidably mounted in the cavity (25), a spring (30) is fixedly connected between the two locking blocks (29), a cross bar is axially slidably mounted inside the connecting piece (11), and the cross bar and the outer walls of the two locking blocks (29) are rotatably connected with a connecting rod (26), one end of the cross bar is fixedly connected with a sleeve rod (27), a locking portion for fixing the position of the sleeve rod (27) is provided in the sleeve rod (27), and a fan-shaped groove for allowing the sleeve rod (27) to move is provided on the outer wall of the sleeve (12).

9. The thread and torque detection device according to claim 8, Features: The locking portion comprises a limiting rod (28) slidably mounted in a sleeve rod (27), an annular groove being provided in the sleeve rod (27), a circular ring which can slide in the annular groove being fixedly mounted on the outer wall of the limiting rod (28) located in the annular groove, and a tension spring being provided between the circular ring and the inner bottom wall of the annular groove, and a slot for the limiting rod (28) to be embedded in the cavity (25).

10. The thread and torque detection device according to claim 8, Features: The thread length in the limiting threaded tube (9) is greater than the thread length in the detecting threaded tube (15), and the excess length is less than the sliding distance of the connecting piece (11) in the sleeve (12).

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