A torsional fatigue testing device

Abstract

The present invention belongs to the technical field of torsion fatigue testing, and in particular, relates to a torsion fatigue testing device, including a frame, a test bench, a lifting device, a first driving mechanism, a driving head, a first locking structure, a second locking structure and a second driving mechanism, wherein the first locking structure and the second locking structure are arranged at intervals, the first locking structure locks one end of the headband, the second locking structure locks the other end of the headband, the second driving structure can drive the second locking structure to move in a direction away from the first locking structure, the first driving mechanism is connected to the lifting device, the driving head is connected to the first driving mechanism, the lifting device can drive the first driving mechanism and the driving head to move in a direction close to or away from the test bench, the driving head is used to be connected to an adjustment knob on the headband, and the first driving mechanism drives the driving head to rotate so that the driving head drives the headband to twist. The torsion angle of the adjustment knob can be accurately controlled to improve the accuracy of the measured torsion limit times.

Description

Technical Field

[0001] The invention belongs to the technical field of torsional fatigue testing, and in particular relates to a torsional fatigue testing device. Background Art

[0002] Head-mounted display devices send optical signals to the eyes through various head displays, which can achieve different effects such as virtual reality (VR), augmented reality (AR), and mixed reality (MR). Currently, head-mounted display devices include a shell, a headband, and an audio-visual component. The audio-visual component is installed in the shell for projecting images and playing sounds, and the headband is installed on the side of the shell facing away from humans for people to wear.

[0003] The headband of the head-mounted display device is equipped with an adjustment knob, which is used to adjust the tightness of the headband. The adjustment knob has a torsional fatigue limit. When the number of twists reaches the limit, the adjustment knob will fail. Therefore, it is necessary to design a torsional fatigue testing device to test the adjustment knob during the production process, so as to test the twist limit of the adjustment knob.

[0004] An existing testing device includes a testing platform and a mounting seat, wherein the mounting seat is connected to the testing platform. During the test, the headband is fixed on the mounting seat, and the adjusting knob is manually twisted back and forth. When the adjusting knob fails, the twisting times are recorded, thereby measuring the twisting times limit of the adjusting knob.

[0005] However, in the existing testing device, when a person twists the adjustment knob manually, the angle of the adjustment knob cannot be accurately controlled each time the adjustment knob is twisted. Therefore, the obtained limit of the number of twists is inaccurate. Summary of the invention

[0006] The technical problem to be solved by the present invention is: to provide a torsional fatigue testing device in view of the problem that the existing testing device cannot accurately control the angle of the adjusting knob each time it is twisted.

[0007] To solve the above technical problems, an embodiment of the present invention provides a torsional fatigue testing device, including a frame, a test bench, a lifting device, a first driving mechanism, a driving head, a first locking structure, a second locking structure and a second driving mechanism, wherein the test bench is connected to the frame, the first locking structure and the second locking structure are arranged on the test bench at intervals, the first locking structure is used to lock one end of the headband, the second locking structure is used to lock the other end of the headband, the second driving structure is connected to the second locking structure, and the second driving structure can drive the second locking structure to move in a direction away from the first locking structure;

[0008] The lifting device is connected to the frame, the lifting device is located above the test bench, the first driving mechanism is connected to the lifting device, the driving head is connected to the first driving mechanism, the first driving mechanism is used to drive the driving head to rotate, and the lifting device can drive the first driving mechanism and the driving head to move towards or away from the test bench;

[0009] The driving head is used to be connected to the adjusting knob on the headband, and the first driving mechanism drives the driving head to rotate, so that the driving head drives the headband to twist.

[0010] Optionally, a torque sensor is further included, wherein the torque sensor is connected between the first driving mechanism and the driving head, and the torque sensor is used to detect the torque between the first driving mechanism and the driving head.

[0011] Optionally, the first driving mechanism includes a mounting frame, a motor, a first synchronous wheel, a second synchronous wheel, a belt and a transmission rod, the mounting frame is connected to the lifting device, the motor is connected to the mounting frame, the first synchronous wheel is connected to the output end of the motor, the transmission rod is rotatably assembled with the mounting frame, the second synchronous wheel is connected to the transmission rod, the belt is wrapped around the first synchronous wheel and the second synchronous wheel, and the torque sensor is connected between the transmission rod and the drive head.

[0012] Optionally, the driving head includes a third driving mechanism, a first chuck and a second chuck, the third driving mechanism is connected to the torque sensor, the first chuck and the second chuck are connected to the third driving mechanism at intervals, and the third driving mechanism can drive the first chuck to move towards or away from the second chuck.

[0013] Optionally, the lifting device includes a lifting seat, a first slide rail and a lifting drive mechanism, the first slide rail is arranged on the frame, the lifting seat is assembled with the first slide rail, the lifting drive mechanism is connected to the frame, the lifting drive mechanism is connected to the lifting seat, the lifting drive mechanism drives the lifting seat to rise and fall, and the first drive mechanism is connected to the lifting seat.

[0014] Optionally, the first locking structure includes a first base, a first clamping plate, a first buckle and a first driving member, and the first clamping plate is rotatably assembled on the first base;

[0015] A first clamping hole is provided on the first base, and the first clamp includes a first connecting part, a first wrench part, a first driving part and a first hook part. The first connecting part is connected between the first wrench part and the first hook part, the first connecting part is rotatably assembled with the first clamping plate, the first driving part is connected to the first connecting part, and the first driving member is connected between the first clamping plate and the first driving part. The first driving member can drive the first driving part to rotate in a direction away from the first clamping plate so that the first hook part is clamped with the first clamping hole.

[0016] Optionally, the second locking structure includes a second base, a second clamping plate, a second buckle and a second driving member, and the second clamping plate is rotatably assembled on the second base;

[0017] A second clamping hole is provided on the second base, and the second clamping buckle includes a second connecting part, a second wrench part, a second driving part and a second hook part. The second connecting part is connected between the second wrench part and the second hook part, the second connecting part is rotatably assembled with the second clamping plate, the second driving part is connected to the second connecting part, and the second driving member is connected between the second clamping plate and the second driving part. The second driving member can drive the second driving part to rotate in a direction away from the second clamping plate so that the second hook part is clamped with the second clamping hole.

[0018] Optionally, the second driving structure includes a second base, a second slide rail, a second translation seat and a third driving member, the second base is arranged on the test bench, the second slide rail is arranged on the second base, the second translation seat is assembled with the second slide rail, the second locking structure is connected to the second translation seat, the driving member is connected to the second base, the second translation seat is connected to the driving member, and the third driving member can drive the second translation seat to move in a direction away from the first locking structure.

[0019] Optionally, the third driving member includes a connecting plate, a fixed plate, a fixed pulley, a pull rope and a weight, the connecting plate is connected to the second translation seat, the fixed plate is connected to the second base, the fixed pulley is rotatably assembled with the fixed plate, one end of the pull rope is connected to the connecting plate, the other end of the pull rope is connected to the weight, the fixed pulley is used to support the pull rope, and the weight is hung on the connecting plate through the pull rope.

[0020] Optionally, the second driving structure further includes a scale extending along the movement direction of the second translation seat, and an arrow mark is provided on the second translation seat, and the arrow mark points to the scale mark to indicate the movement distance of the second translation seat.

[0021] According to the torsional fatigue testing equipment of the embodiment of the present invention, the lifting device can drive the first driving mechanism and the driving head to move in the direction close to the test bench, so that the bottom end of the driving head can abut against the headband, and the first driving mechanism drives the driving head to rotate, and relies on the friction between the driving head and the adjusting knob to drive the adjusting knob to rotate, so as to achieve the twisting of the adjusting knob, and the second driving mechanism can drive the second locking structure away from the first locking structure, so as to achieve the resetting of the headband, and avoid the torsional deformation of the headband affecting the rotation angle of the adjusting knob, so as to perform a reciprocating torsion test on the adjusting knob. Compared with the prior art, the first driving mechanism drives the driving head to rotate, so as to control the rotation angle of the adjusting knob, so as to accurately control the torsion angle of the adjusting knob, thereby improving the accuracy of the measured torsion limit times. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a torsional fatigue testing device provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the partial structure of a torsional fatigue testing device provided in one embodiment of the present invention Figure 1 ;

[0024] Figure 3 A schematic diagram of the partial structure of a torsional fatigue testing device provided in one embodiment of the present invention Figure 2 ;

[0025] Figure 4 A schematic diagram of the partial structure of a torsional fatigue testing device provided in one embodiment of the present invention Figure 3 ;

[0026] Figure 5 for Figure 4 A schematic structural diagram of the first locking structure;

[0027] Figure 6 for Figure 5 Schematic diagram of the decomposition of

[0028] Figure 7 for Figure 4 A schematic structural diagram of the second locking structure;

[0029] Figure 8 for Figure 7 Schematic diagram of the decomposition of

[0030] Fig. 9 A schematic diagram of the structure of a headband.

[0031] The accompanying drawings in the specification are marked as follows: 1, frame; 2, test bench; 3, lifting device; 4, first driving mechanism; 5, driving head; 6, first chuck; 7, second chuck; 8, translation cylinder; 9, lifting driving mechanism; 10, first slide rail; 11, lifting seat; 12, lifting cylinder; 13, mounting frame; 14, motor; 15, first synchronous wheel; 16, second synchronous wheel; 17, belt; 18, transmission rod; 19, torque sensor; 2 0. First base plate; 21. Transition plate; 22. Support plate; 23. First locking structure; 24. Limiting plate; 25. Limiting space; 26. Headband; 27. Positioning hole; 28. Adjustment knob; 29. ​​Second locking structure; 30. Second translation seat; 31. Third buckle; 32. Rack; 33. Second slide rail; 34. Connecting plate; 35. Fixed pulley; 36. Pull rope; 37. Hook; 38. Weight; 39. Arrow mark; 40. Scale ; 41, first clamping plate; 42, first positioning groove; 43, first pressure plate hole; 44, first pressure plate; 45, first jack; 46, first middle plate; 47, first sealing plate; 48, first buckle; 49, first wrench part; 50, first driving part; 51, first connecting part; 52, first hook part; 53, first mounting groove; 54, first rotating shaft; 55, first base; 56, first clamp hole; 57, first positioning column; 58, second rotating shaft Axis; 59, first torsion spring; 60, first bolt; 61, second clamp; 62, second base; 63, second positioning column; 64, second buckle; 65, second wrench part; 66, second driving part; 67, second connecting part; 68, second hook part; 69, third rotating shaft; 70, second mounting groove; 71, second plug hole; 72, second clamp hole; 73, fourth rotating shaft; 74, second torsion spring; 75, first spring; 76, second spring. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] like Figures 1 to 9As shown, an embodiment of the present invention provides a torsional fatigue testing device, including a frame 1, a test bench 2, a lifting device 3, a first driving mechanism 4, a driving head 5, a first locking structure 23, a second locking structure 29 and a second driving mechanism, the test bench 2 is connected to the frame 1, the first locking structure 23 and the second locking structure 29 are arranged on the test bench 2 at intervals, the first locking structure 23 is used to lock one end of the headband 26, the second locking structure 29 is used to lock the other end of the headband 26, the second driving structure is connected to the second locking structure 29, and the second driving structure can drive the second locking structure 29 to move in a direction away from the first locking structure 23.

[0034] The lifting device 3 is connected to the frame 1, and the lifting device 3 is located above the test bench 2. The first driving mechanism 4 is connected to the lifting device 3, and the driving head 5 is connected to the first driving mechanism 4. The first driving mechanism 4 is used to drive the driving head 5 to rotate. The lifting device 3 can drive the first driving mechanism 4 and the driving head 5 to move toward or away from the test bench 2. The driving head 5 is used to be connected to the adjustment knob 28 on the headband 26. The first driving mechanism 4 drives the driving head 5 to rotate, so that the driving head 5 drives the adjusting knob 28 to rotate.

[0035] The lifting device 3 can drive the first driving mechanism 4 and the driving head 5 to move towards the test bench 2, so that the bottom end of the driving head 5 can abut against the headband 26. The first driving mechanism 4 drives the driving head 5 to rotate, so that the driving head 5 drives the adjusting knob 28 to rotate. The second driving mechanism can drive the second locking structure 29 away from the first locking structure 23, thereby realizing the resetting of the headband 26, so that the adjusting knob 28 can be subjected to a reciprocating torsion test.

[0036] In one embodiment, the torsional fatigue testing device further includes a torque sensor 19 , which is connected between the first driving mechanism 4 and the driving head 5 , and is used to detect the torque between the first driving mechanism 4 and the driving head 5 .

[0037] The torque sensor 19 is connected between the first driving mechanism 4 and the driving head 5. The first driving mechanism 4 drives the torque sensor 19 and the driving head 5 to rotate. The torque between the first driving mechanism 4 and the driving head 5 is measured by the torque sensor 19 to detect the torque size in real time.

[0038] In one embodiment, the first driving mechanism 4 includes a mounting frame 13, a motor 14, a first synchronous wheel 15, a second synchronous wheel 16, a belt 17 and a transmission rod 18, the mounting frame 13 is connected to the lifting device 3, the motor 14 is connected to the mounting frame 13, the first synchronous wheel 15 is connected to the output end of the motor 14, the transmission rod 18 is rotatably assembled with the mounting frame 13, the second synchronous wheel 16 is connected to the transmission rod 18, the belt 17 is arranged on the first synchronous wheel 15 and the second synchronous wheel 16, and the torque sensor 19 is connected between the transmission rod 18 and the driving head 5.

[0039] The mounting frame 13 is connected to the lifting device 3, and the motor 14 is installed on the mounting frame 13. The motor 14 drives the first belt wheel 17 to rotate, and the belt 17 drives the second synchronous wheel 16 to rotate, and then the second synchronous wheel 16 drives the transmission rod 18 to rotate, and the lower end of the rotating rod is connected to the torque sensor 19, and then the transmission rod 18 drives the torque sensor 19 and the driving head 5 to rotate. The structure is simple and easy to design.

[0040] In one embodiment, the driving head 5 includes a third driving mechanism, a first chuck 6 and a second chuck 7, the third driving mechanism is connected to the torque sensor 19, the first chuck 6 and the second chuck 7 are connected to the third driving mechanism at intervals, and the third driving mechanism can drive the first chuck 6 to move towards or away from the second chuck 7.

[0041] The first chuck 6 and the second chuck 7 are connected to each other at intervals on the torque sensor 19, and the third driving mechanism is a translation cylinder 8, which is connected to the torque sensor 19, and the first chuck 6 and the second chuck 7 are both connected to the translation cylinder 8, and the translation cylinder 8 drives the first chuck 6 and the second chuck 7 to move closer to or away from each other, thereby clamping the adjustment knob 28 of the headband 26.

[0042] In one embodiment, the lifting device 3 includes a lifting seat 11, a first slide rail 10 and a lifting drive mechanism 9, the first slide rail 10 is arranged on the frame 1, the lifting seat 11 is assembled with the first slide rail 10, the lifting drive mechanism 9 is connected to the frame 1, the lifting drive mechanism 9 is connected to the lifting seat 11, the lifting drive mechanism 9 drives the lifting seat 11 to rise and fall, and the first drive mechanism 4 is connected to the lifting seat 11.

[0043] The lifting drive device is a lifting cylinder 12, which is connected to the frame 1, the first slide rail 10 is extended up and down on the frame 1, the lifting seat 11 is slidably assembled on the first slide rail 10, the piston rod of the lifting cylinder 12 is connected to the lifting seat 11, the mounting frame 13 of the first driving mechanism 4 is connected to the lifting seat 11, and the lifting cylinder 12 drives the lifting seat 11 to move up and down, so that the lifting seat 11 drives the mounting frame 13 to move up and down. The structure is simple and easy to design.

[0044] In one embodiment, the first locking structure 23 includes a first base 55, a first clamping plate 41, a first buckle 48 and a first driving member. The first clamping plate 41 is rotatably assembled on the first base 55 via a second rotating shaft 58. The first base 55 is provided with a first clamping hole 56. The first buckle 48 includes a first connecting portion 51, a first wrench portion 49, a first driving portion 50 and a first hook portion 52. The first connecting portion 51 is connected between the first wrench portion 49 and the first hook portion 52. The first connecting portion 51 is rotatably assembled with the first clamping plate 41 via a first rotating shaft 54. The first driving portion 50 is connected to the first connecting portion 51. The first driving member is connected between the first clamping plate 41 and the first driving portion 50. The first driving member can drive the first driving portion 50 to rotate in a direction away from the first clamping plate 41 so that the first hook portion 52 is engaged with the first clamping hole 56.

[0045] The first driving member is a first spring 75. A first mounting groove 53 is provided on the side of the first clamping plate 41 facing away from the first base 55. One end of the first spring 75 is connected to the bottom wall of the first mounting groove 53, and the other end is connected to the first driving part 50. The first spring 75 can drive the first driving part 50 away from the bottom wall of the first mounting groove 53 by relying on elastic force.

[0046] The first base 55 is further provided with a first positioning column 57 , the first clamping plate 41 is provided with a first positioning groove 42 , the bottom of the first positioning groove 42 is provided with a first pressing plate hole 43 , the first pressing plate hole 43 is provided with a first pressing plate 44 , and the first pressing plate 44 is provided with a first plug hole 45 .

[0047] The first locking structure 23 also includes a first middle plate 46, a first sealing plate 47 and a first bolt 60. When installing the headband 26, first insert the first positioning column 57 into the positioning hole 27 at one end of the headband 26, then press the first clamping plate 41 onto the first base 55, so that the first positioning column 57 is inserted into the first insertion hole 45 of the first pressing plate 44, the first middle plate 46 is installed in the first positioning groove 42, the first middle plate 46 is connected to the first pressing plate 44, then the first sealing plate 47 is covered on the first clamping plate 41, and then the first sealing plate 47 is connected to the first clamping plate 41, and the first bolt 60 is installed on the first sealing plate 47 so that the first bolt 60 is inserted into the first clamping plate 41. 0 one end close to the first middle plate 46 is pressed against the first middle plate 46, and then the first wrench part 49 is pulled to make the first hook part 52 engage with the first clamping hole 56 on the first base 55. Under the elastic force of the first spring 75, the first spring 75 drives the first driving part 50 to rotate in the direction away from the first clamping plate 41, so as to exert an action on the first hook part 52 through the first connecting part 51 to prevent the first hook part 52 from falling out of the first clamping hole 56. When the headband 26 needs to be removed, the first wrench part 49 is manually pulled in the opposite direction to make the first wrench part 49 rotate toward the first clamping plate 41 to make the first hook part 52 break away from the first clamping hole 56.

[0048] A first torsion spring 59 is further provided between the first clamping plate 41 and the first base 55 . When the headband 26 is disassembled, the first torsion spring 59 can bounce up the first clamping plate 41 so that the first clamping plate 41 is away from the first base 55 , thereby assisting disassembly.

[0049] The first locking structure 23 also includes a first bottom plate 20, a transition plate 21 and a support plate 22. The first bottom plate 20 is installed on the test bench 2. The transition plate 21 can be horizontally movably arranged on the first bottom plate 20. The support plate 22 can be horizontally movably arranged on the transition plate 21. The moving direction of the support plate 22 is perpendicular to the supporting direction of the transition plate 21. The first base 55 is installed on the support plate 22. The first base 55 can move horizontally on the transition plate 21 with the support plate 22, so as to adjust the horizontal position of the first base 55, so as to facilitate the installation of the headband 26.

[0050] The first locking structure 23 further includes a limiting plate 24 , which is connected to the first base 55 . The limiting plate 24 has a limiting space 25 for the headband 26 to enter, and is used to limit the torsional deformation of the headband 26 .

[0051] In one embodiment, the second locking structure 29 includes a second base 62 , a second clamping plate 61 , a second buckle 64 and a second driving member. The second clamping plate 61 is rotatably assembled on the second base 62 via a fourth rotating shaft 73 .

[0052] A second clamping hole 72 is provided on the second base 62, and the second buckle 64 includes a second connecting portion 67, a second wrench portion 65, a second driving portion 66 and a second hook portion 68. The second connecting portion 67 is connected between the second wrench portion 65 and the second hook portion 68. The second connecting portion 67 is rotatably assembled with the second clamping plate 61 through a third rotating shaft 69. The second driving portion 66 is connected to the second connecting portion 67. The second driving member is connected between the second clamping plate 61 and the second driving portion 66. The second driving member can drive the second driving portion 66 to rotate in a direction away from the second clamping plate 61 so that the second hook portion 68 is engaged with the second clamping hole 72.

[0053] The second driving member is a second spring 76. A second mounting groove 70 is provided on the side of the second clamping plate 61 facing away from the second base 62. One end of the second spring 76 is connected to the bottom wall of the second mounting groove 70, and the other end is connected to the second driving part 66. The second spring 76 can drive the second driving part 66 away from the bottom wall of the second mounting groove 70 by relying on elastic force.

[0054] The second base 62 is also provided with a second positioning column 63. When installing the headband 26, the second positioning column 63 is first inserted into the positioning hole 27 at the other end of the headband 26, and then the second clamping plate 61 is pressed onto the second base 62, so that the second positioning column 63 is inserted into the second insertion hole 71 of the second clamping plate 61, and then the second wrench part 65 is pulled so that the second hook part 68 is engaged with the second clamping hole 72 on the second base 62. Under the elastic force of the second spring 76, the second spring 76 drives the second driving part 66 to rotate in the direction away from the second clamping plate 61, so as to exert an action on the second hook part 68 through the second connecting part 67 to prevent the second hook part 68 from falling out of the second clamping hole 72. When the headband 26 needs to be removed, the second wrench part 65 is manually pulled in the opposite direction so that the second wrench part 65 rotates toward the second clamping plate 61 to make the second hook part 68 disengage from the second clamping hole 72.

[0055] A second torsion spring 74 is further provided between the second clamping plate 61 and the second base 62 . When the headband 26 is disassembled, the second torsion spring 74 can bounce up the second clamping plate 61 , so that the second clamping plate 61 is away from the second base 62 , to assist in disassembly.

[0056] In one embodiment, the second driving structure includes a second base 62, a second slide rail 33, a second translation seat 30 and a third driving member, the second base 62 is arranged on the test bench 2, the second slide rail 33 is arranged on the second base 62, the second translation seat 30 is assembled with the second slide rail 33, the second locking structure 29 is connected to the second translation seat 30, the driving member is connected to the second base 62, the second translation seat 30 is connected to the driving member, and the third driving member can drive the second translation seat 30 to move in a direction away from the first locking structure 23.

[0057] The third driving member includes a connecting plate 34, a fixed plate, a fixed pulley 35, a pull rope 36 and a weight 38. The connecting plate 34 is connected to the second translation seat 30, the fixed plate is connected to the second base 62, the fixed pulley 35 is rotatably assembled with the fixed plate, one end of the pull rope 36 is connected to the connecting plate 34, and the other end of the pull rope 36 is connected to the weight 38. The fixed pulley 35 is used to support the pull rope 36, and the weight 38 is hung on the connecting plate 34 through the pull rope 36.

[0058] One end of the pull rope 36 is connected to the connecting plate 34, and one end of the pull rope 36 is provided with a hook 37, and a weight 38 is hung on the hook 37. When the headband 26 is subjected to a torsion test, when the motor 14 drives the driving head 5 to rotate forward, the driving head 5 drives the adjusting knob 28 to twist. When the adjusting knob rotates, the belt 26 as a whole will produce a certain torsional deformation. When the belt 26 produces torsional deformation, it will pull the second locking structure 29 to move along the second slide rail 33 close to the first locking structure 23. At this time, the second locking structure 29 will drive the second translation seat 30 to move, and the weight 38 will be pulled up by the pull rope 36. When the driving head 5 rotates in the opposite direction away from the adjusting knob 28, the weight 38 pulls the second translation seat 30 and the second locking structure 29 away from the first locking structure 23, and the auxiliary belt 17 returns to its original state.

[0059] In one embodiment, the second driving structure further includes a scale 40 extending along the movement direction of the second translation seat 30 . An arrow mark 39 is provided on the second translation seat 30 , and the arrow mark 39 points to the scale 40 to indicate the movement distance of the second translation seat 30 .

[0060] The arrow mark 39 cooperates with the scale 40 to indicate the moving distance of the second translation seat 30 . The moving distance of the second translation seat 30 can be used to show the twisting degree of the headband 26 .

[0061] The second translation seat 30 is rotatably equipped with a third buckle 31 , the test bench 2 is provided with a rack 32 , the rack 32 is parallel to the second slide rail 33 , and the third buckle 31 is engaged with the rack 32 , so that the second translation seat 30 can be placed on the test bench 2 .

[0062] The torsional fatigue testing device of the embodiment of the present invention has the following working principle:

[0063] The lifting device 3 can drive the first driving mechanism 4 and the driving head 5 to move in the direction close to the test bench 2, so that the bottom end of the driving head 5 can abut against the headband 26, and the first clamp 6 and the second clamp 7 clamp the adjusting knob 28. The first driving mechanism 4 drives the driving head 5 to rotate, so that the driving head 5 drives the adjusting knob 28 to rotate. When the motor 14 drives the driving head 5 to rotate in the forward direction, the driving head 5 drives the adjusting knob 28 to rotate. When the adjusting knob 28 rotates, it will cause a certain torsional deformation of the headband 26. When the headband 26 is twisted and deformed , it will pull the second locking structure 29 to move along the second slide rail 33 close to the first locking structure 23. At this time, the second locking structure 29 will drive the second translation seat 30 to move, and the weight 38 will be pulled up by the pull rope 36. When the drive head 5 moves away from the headband 26 or rotates in the opposite direction, the weight 38 will pull the second translation seat 30 and the second locking structure 29 away from the first locking structure 23 through the pull rope 36, and the auxiliary belt 17 will return to its original state. In this way, the headband 26 is subjected to a torsional fatigue test reciprocatingly to measure the torsional limit number of the adjustment knob 28.

[0064] According to the torsional fatigue testing equipment of an embodiment of the present invention, the lifting device 3 can drive the first driving mechanism 4 and the driving head 5 to move toward the test bench 2, so that the bottom end of the driving head 5 can abut against the headband 26, and the first driving mechanism 4 drives the driving head 5 to rotate, so that the driving head 5 drives the adjusting knob 28 to rotate, and the second driving mechanism can drive the second locking structure 29 away from the first locking structure 23, thereby realizing the resetting of the headband 26 and preventing the torsional deformation of the headband 26 from affecting the rotation angle of the adjusting knob 28, so that the adjusting knob 28 can be subjected to a reciprocating torsion test. Compared with the prior art, the first driving mechanism 4 drives the driving head 5 to rotate, so that the rotation angle of the adjusting knob 28 can be controlled, so that the torsional angle of the adjusting knob 28 can be accurately controlled, thereby improving the accuracy of the measured torsional limit times.

[0065] In other embodiments, the first driving member may be an electric push rod.

[0066] In other embodiments, the driving member may be a screw-nut mechanism.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A torsional fatigue testing device, characterized in that: The device comprises a frame (1), a test bench (2), a lifting device (3), a first driving mechanism (4), a driving head (5), a first locking structure (23), a second locking structure (29) and a second driving mechanism, wherein the test bench (2) is connected to the frame (1), the first locking structure (23) and the second locking structure (29) are arranged on the test bench (2) at intervals, the first locking structure (23) is used to lock one end of a headband (26), the second locking structure (29) is used to lock the other end of the headband (26), the second driving structure is connected to the second locking structure (29), and the second driving structure is capable of driving the second locking structure (29) to move in a direction away from the first locking structure (23); The lifting device (3) is connected to the frame (1), the lifting device (3) is located above the test bench (2), the first driving mechanism (4) is connected to the lifting device (3), the driving head (5) is connected to the first driving mechanism (4), the first driving mechanism (4) is used to drive the driving head (5) to rotate, and the lifting device (3) can drive the first driving mechanism (4) and the driving head (5) to move in a direction close to or away from the test bench (2); The driving head (5) is used to be connected to an adjusting knob (28) on a headband (26), and the first driving mechanism (4) drives the driving head (5) to rotate, so that the driving head (5) drives the adjusting knob (28) to rotate.

2. The torsional fatigue testing device according to claim 1, characterized in that: It also includes a torque sensor (19), which is connected between the first drive mechanism (4) and the drive head (5), and is used to detect the torque between the first drive mechanism (4) and the drive head (5).

3. The torsional fatigue testing device according to claim 2, characterized in that: The first driving mechanism (4) comprises a mounting frame (13), a motor (14), a first synchronous wheel (15), a second synchronous wheel (16), a belt (17) and a transmission rod (18); the mounting frame (13) is connected to the lifting device (3); the motor (14) is connected to the mounting frame (13); the first synchronous wheel (15) is connected to an output end of the motor (14); the transmission rod (18) is rotatably assembled with the mounting frame (13); the second synchronous wheel (16) is connected to the transmission rod (18); the belt (17) is arranged on the first synchronous wheel (15) and the second synchronous wheel (16); and the torque sensor (19) is connected between the transmission rod (18) and the driving head (5).

4. The torsional fatigue testing device according to claim 2, characterized in that: The driving head (5) comprises a third driving mechanism, a first chuck (6) and a second chuck (7); the third driving mechanism is connected to the torque sensor (19); the first chuck (6) and the second chuck (7) are connected to the third driving mechanism at a distance; the third driving mechanism is capable of driving the first chuck (6) to move in a direction close to or away from the second chuck (7).

5. The torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: The lifting device (3) comprises a lifting seat (11), a first slide rail (10) and a lifting drive mechanism (9); the first slide rail (10) is arranged on the frame (1); the lifting seat (11) is assembled with the first slide rail (10); the lifting drive mechanism (9) is connected to the frame (1); the lifting drive mechanism (9) is connected to the lifting seat (11); the lifting drive mechanism (9) drives the lifting seat (11) to rise and fall; and the first drive mechanism (4) is connected to the lifting seat (11).

6. The torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: The first locking structure (23) comprises a first base (55), a first clamping plate (41), a first buckle (48) and a first driving member, wherein the first clamping plate (41) is rotatably mounted on the first base (55); The first base (55) is provided with a first clamping hole (56), and the first buckle (48) includes a first connecting part (51), a first wrench part (49), a first driving part (50) and a first hook part (52), the first connecting part (51) is connected between the first wrench part (49) and the first hook part (52), the first connecting part (51) is rotatably assembled with the first clamping plate (41), the first driving part (50) is connected to the first connecting part (51), the first driving member is connected between the first clamping plate (41) and the first driving member (50), and the first driving member can drive the first driving part (50) to rotate in a direction away from the first clamping plate (41) so that the first hook part (52) is clamped with the first clamping hole (56).

7. The torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: The second locking structure (29) comprises a second base (62), a second clamping plate (61), a second buckle (64) and a second driving member, wherein the second clamping plate (61) is rotatably mounted on the second base (62); The second base (62) is provided with a second clamping hole (72), and the second clamping buckle (64) includes a second connecting portion (67), a second wrench portion (65), a second driving portion (66) and a second hook portion (68). The second connecting portion (67) is connected between the second wrench portion (65) and the second hook portion (68). The second connecting portion (67) is rotatably assembled with the second clamping plate (61). The second driving portion (66) is connected to the second connecting portion (67). The second driving member is connected between the second clamping plate (61) and the second driving portion (66). The second driving member can drive the second driving portion (66) to rotate in a direction away from the second clamping plate (61) so that the second hook portion (68) is clamped with the second clamping hole (72).

8. The torsional fatigue testing device according to any one of claims 1 to 4, characterized in that: The second driving structure comprises a second base (62), a second slide rail (33), a second translation seat (30) and a third driving member, wherein the second base (62) is arranged on the test bench (2), the second slide rail (33) is arranged on the second base (62), the second translation seat (30) is assembled with the second slide rail (33), the second locking structure (29) is connected to the second translation seat (30), the third driving member is connected to the second base (62), the second translation seat (30) is connected to the driving member, and the third driving member is capable of driving the second translation seat (30) to move in a direction away from the first locking structure (23).

9. The torsional fatigue testing device according to claim 8, characterized in that: The third driving member comprises a connecting plate (34), a fixed plate, a fixed pulley (35), a pull rope (36) and a weight (38); the connecting plate (34) is connected to the second translation seat (30); the fixed plate is connected to the second base (62); the fixed pulley (35) is rotatably assembled with the fixed plate; one end of the pull rope (36) is connected to the connecting plate (34); the other end of the pull rope (36) is connected to the weight (38); the fixed pulley (35) is used to support the pull rope (36); and the weight (38) is suspended on the connecting plate (34) through the pull rope (36).

10. The torsional fatigue testing device according to claim 8, characterized in that: The second driving structure further comprises a scale (40), the scale (40) extending along the movement direction of the second translation seat (30), an arrow mark (39) being provided on the second translation seat (30), the arrow mark (39) pointing to the scale (40) to indicate the movement distance of the second translation seat (30).

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