A screw cycle testing device for screw rods

Abstract

The present invention discloses a screw cycle test device for a screw rod, belonging to the technical field of test devices. The screw cycle test device for a screw rod comprises a mounting base plate, a driving motor is fixedly connected to one side of the upper surface of the mounting base plate, a driving shaft is fixedly connected to one side of the driving motor, a driving mechanism is arranged on one side of the driving motor, the driving mechanism comprises a fixed sleeve rotatably connected to the driving shaft, and a torque adjustment mechanism is arranged at one end of the fixed sleeve away from the driving motor. The present invention adjusts the maximum torque that the screw rod can withstand when rotating by adopting the cooperation between the driving mechanism and the torque adjustment mechanism, and avoids damage to the screw rod or workpiece caused by excessive application of torque, and by adopting the synergistic effect between the test connection mechanism and the push sleeve, the efficient replacement of the screw rod can be achieved, thereby reducing the downtime of the device and improving the test efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of testing devices, and in particular relates to a screw cycle testing device for a screw rod. Background Art

[0002] The screw rod is a common mechanical part, which is usually used to connect the nut with the screw hole or threaded hole, and achieve the tightening or fixing effect between the two by rotation. It is usually cylindrical in shape with threads on the surface. The threads are spiral grooves or protrusions along the surface of the screw rod, which usually match the threads of the nut. The screw rod is usually made of metal, such as steel, stainless steel, aluminum, etc., and can also be made of plastic or other materials. The screw cycle test is a test process used to evaluate the performance and reliability of screws during cyclic assembly. In the screw cycle test, cyclic assembly operations under actual use conditions are usually simulated, such as screwing the screw into a nut or threaded hole, and then removing it, and repeating this process many times. The test is designed to simulate the stress and wear that the screw is subjected to in actual use to evaluate its durability, torque retention ability, loosening characteristics, etc. during cyclic assembly.

[0003] During testing, the existing screw cycle testing device lacks a test sample protection device, which makes it easy for the screw thread to be damaged due to excessive cyclic torque of the screw rod. The staff needs to frequently replace the screw rod, which increases the test cost and test downtime. At the same time, most of the screw cycle testing devices on the market need to be tested manually, which greatly reduces the test efficiency. Most of the tests rely on a three-jaw chuck to fix it. As a mechanical equipment, the three-jaw chuck may require regular maintenance and care, which will also increase daily maintenance costs and worker maintenance workload. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a screw cycle testing device for a screw rod.

[0005] The technical solution adopted to solve the above technical problems is: a screw cycle testing device for a screw rod, comprising a mounting base plate, a driving motor is fixedly connected to one side of the upper surface of the mounting base plate, a driving shaft is fixedly connected to one side of the driving motor, and a driving mechanism is arranged on one side of the driving motor;

[0006] The driving mechanism comprises a fixed sleeve rotatably connected to the driving shaft, a mounting ring rotatably connected inside the fixed sleeve, an inner gear ring fixedly connected inside the mounting ring, a driving gear is arranged at the center of the inner gear ring, the driving gear is fixedly connected to the driving shaft, a plurality of driven gears are evenly arranged on the outer side of the inner gear ring, the two sides of the driven gear are respectively meshed with the inner gear ring and the driving gear for transmission, and a torque adjustment mechanism is arranged at one end of the fixed sleeve away from the driving motor;

[0007] The torque adjustment mechanism includes an adjustment cover threadedly connected to the fixed sleeve, a movable plate is slidably connected inside the fixed sleeve, a first spring is arranged on the side of the movable plate away from the adjustment cover, a steel ball fixing frame is arranged on the end of the first spring away from the movable plate, a plurality of limiting steel balls are evenly fixedly installed on the circumference of the steel ball fixing frame, a plurality of limiting protrusions are fixedly installed on the mounting ring, and a power connection mechanism is arranged inside the mounting ring.

[0008] By means of the above technical scheme, the adjusting cover is rotated and the adjusting cover moves in a direction away from the screw rod, so that the adjusting cover drives the movable plate to slide and press the first spring, thereby increasing the elastic force of the first spring; the adjusting cover is rotated in the opposite direction and the adjusting cover moves in a direction close to the screw rod, thereby relaxing the first spring and reducing its elastic force. The greater the elastic force of the first spring, the greater the pressure applied by the first spring to the steel ball fixing frame, the greater the squeezing force of the limiting steel ball on the mounting ring, and the greater the torque required for the limiting protrusion on the mounting ring to break through the limiting steel ball when rotating. Thus, the maximum torque that the screw rod can withstand when rotating is adjusted, so that the staff can simulate the different torque conditions that the screw rod is subjected to in actual use.

[0009] Furthermore, a fixed bearing is installed on the outer side of the driving shaft, and the driving gear is rotatably connected to a planetary carrier at one end away from the driving shaft. The planetary carrier is rotatably connected to multiple driven gears respectively. A power output shaft is fixedly connected to one side of the planetary carrier, and the power output shaft is rotatably connected to an adjusting cover. A test connection mechanism is provided on one side of the adjusting cover.

[0010] Through the above technical solution, the driving shaft drives the driving gear to rotate, and the driving gear drives several driven gears to rotate along the inner ring through meshing. The inner ring is fixed in the mounting ring and cannot rotate. In this way, the input speed of the driving motor is output by the planetary carrier through the movement of several driven gears.

[0011] Furthermore, the test connection mechanism includes a mounting base rotatably connected to the adjusting cover, a connecting hole is opened in the mounting base, a screw connecting head is slidably connected in the connecting hole, a clamping block is fixedly connected at the upper and lower ends of the connecting hole, clamping grooves are symmetrically opened at both ends of the screw connecting head, the clamping grooves and the screw connecting head are slidably connected, fixed grooves are symmetrically opened on both sides of the screw connecting head, and a screw rod is fixedly connected to the side of the screw connecting head away from the test connection mechanism.

[0012] Through the above technical solution, the screw connector at one end of the screw rod is aligned with the connecting hole and inserted, and the locking block is aligned with the locking groove, so that the screw connector is fixed in position inside the connecting hole.

[0013] Furthermore, limiting grooves are symmetrically provided on both sides of the mounting seat, balls are engaged in the limiting grooves, a connecting ring is slidably connected to the outer side of the mounting seat, a sliding seat is provided on one side of the connecting ring, the sliding seat is slidably connected to the mounting seat, fixing plates are symmetrically fixedly connected on both sides of the sliding seat, the position of the fixing plates corresponds to the position of the limiting grooves, and a second spring is provided on the mounting sleeve on the side of the sliding seat away from the connecting ring.

[0014] Through the above technical solution, the screw connector pushes the ball, the ball moves toward the fixed plate, and the fixed plate squeezes the second spring. When the fixed groove slides to the position corresponding to the ball, the second spring pushes the slide seat outward, and the slide seat drives the fixed plate to squeeze the ball, thereby locking the ball into the fixed groove, so that the screw connector is fixed in the connecting hole.

[0015] Furthermore, a sliding cavity is provided in the mounting seat, a pushing sleeve is slidably installed on the outer side of the mounting seat, a T-shaped ring is fixedly connected to the side of the pushing sleeve away from the locking block, the T-shaped ring is slidably connected to the sliding cavity, a third spring is provided in the sliding cavity, and an anti-slip pad is fixedly connected to the outer side of the pushing sleeve.

[0016] Through the above technical scheme, the pushing sleeve can drive the connecting ring and the sliding seat to move in the direction of the T-ring, so that the ball has a certain amount of moving space in the limit groove. The screw rod is taken out and the fixed groove slides outward. The ball can slide toward the outside of the limit groove close to the connecting hole. The ball is separated from the fixed groove, thereby releasing the fixation of the screw rod connector position, making it convenient for staff to test screw rods of different specifications or types.

[0017] Furthermore, the power connection mechanism includes a first electrode seat fixedly connected to a limiting steel ball, a plurality of second electrode seats are slidably connected in the mounting ring, and a fourth spring is fixedly mounted at the lower end of the second electrode seat.

[0018] Through the above technical solution, the first electrode seat and the second electrode seat are electrically connected to the drive motor. After the screw rod is subjected to excessive torque, the inner gear ring rotates so that the limiting steel ball cannot stop the rotation of the mounting ring through the limiting protrusion, so that the first electrode seat and the second electrode seat are separated, thereby cutting off the power to the drive motor and stopping the screw rod from rotating for testing, thereby avoiding damage to the screw rod or workpiece due to excessive torque.

[0019] Furthermore, a connecting frame is fixedly installed on the outside of the fixing sleeve, the connecting frame is fixedly connected to the mounting base plate, an indicator needle is fixedly provided on the fixing sleeve, scale lines are opened on the adjusting cover, and an anti-slip ring is fixedly connected to the outer ring of the adjusting cover.

[0020] Through the above technical solution, the staff can adjust the torque of the test device through the scale lines on the adjustment cover indicated by the indicator needle, which is convenient for the staff to observe. At the same time, the anti-slip ring also increases the friction coefficient of the outside of the adjustment cover to prevent the outer wall of the adjustment cover from being too smooth and difficult to rotate.

[0021] Furthermore, a connecting seat is fixedly connected to the upper surface of the mounting base plate, a sliding track is symmetrically fixed to the upper surface of the connecting seat, a sliding block is slidably connected to the sliding track, a fixing plate is fixedly installed on the upper surface of the sliding block, a limiting frame is fixedly connected to the fixing plate, a test block is arranged in the limiting frame, an auxiliary test hole is opened in the test block, a positioning block is fixedly connected to the lower end of the fixing plate, a telescopic rod is fixedly connected to one side of the positioning block, the telescopic rod is slidably connected to the hydraulic cylinder, and the hydraulic cylinder is fixedly connected to the connecting seat at one end away from the telescopic rod.

[0022] Through the above technical solution, when conducting a test, the hydraulic cylinder sends the test block to the front end of the screw rod through the telescopic rod, and the screw rod is rotated to align with the auxiliary test hole, so that the test block and the screw rod are threadedly connected, thereby testing the number of cycles and test speed of the screw rod.

[0023] Furthermore, a control mechanism is installed on the upper surface of the mounting base away from the connecting seat, and the control mechanism includes a hydraulic protection box fixedly installed on the mounting base, a small hydraulic pump station is arranged in the hydraulic protection box, an oil pipe interface is fixedly arranged on the upper end of the small hydraulic pump station, a main controller is arranged on one side of the hydraulic protection box, the main controller is fixedly connected to the mounting base, and a control panel is installed on one side of the main controller.

[0024] Through the above technical solution, the small hydraulic pump station, as a hydraulic power unit, can be connected to the hydraulic cylinder through a hydraulic oil pipe and provide hydraulic power to it when working. At the same time, the staff can intuitively observe the test results through the control panel on the main controller.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention adjusts the maximum torque that the screw rod can withstand when it rotates by cooperating with the driving mechanism and the torque adjustment mechanism, which makes it convenient for workers to simulate the different torque conditions that the screw rod is subjected to in actual use, so as to more realistically test the durability and performance of the screw. At the same time, through the electrical connection between the first electrode seat and the second electrode seat and the driving motor, after the screw rod is subjected to excessive torque, the inner gear ring rotates so that the limiting steel ball cannot prevent the rotation of the mounting ring through the limiting protrusion, so that the first electrode seat and the second electrode seat are separated, thereby cutting off the power to the driving motor and stopping the screw rod from rotating for testing, thus avoiding This avoids damage to the screw rod or workpiece caused by excessive torque; (2) The present invention adopts the synergistic effect between the test connection mechanism and the push sleeve. The sliding seat can drive the fixed plate to squeeze the ball, so that the ball is clamped in the fixed groove, thereby realizing rapid installation of the screw rod. The push sleeve is slid, and the push sleeve drives the connecting ring and the sliding seat to move in the direction of the T-ring, so that the ball can be disengaged from the fixed groove, thereby releasing the fixation of the screw rod connector position, so that the screw rod can be taken out of the mounting seat for replacement. In this way, when it is necessary to test screw rods of different specifications or types, efficient replacement of the screw rod can be achieved, thereby reducing the downtime of the device and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 It is a three-dimensional structural diagram of the driving motor, the fixing sleeve and the screw rod of the present invention;

[0028] Figure 3 It is the internal structure diagram of the driving mechanism of the present invention;

[0029] Figure 4 It is an exploded structural diagram of the driving mechanism of the present invention;

[0030] Figure 5 is a cross-sectional structural diagram of the driving mechanism of the present invention;

[0031] Figure 6 is a cross-sectional structural diagram of the test connection mechanism of the present invention;

[0032] Figure 7 It is the internal structure diagram of the test connection mechanism of the present invention;

[0033] Figure 8 This is a three-dimensional structural diagram of the screw connector of the present invention;

[0034] Fig. 9 The present invention Figure 3 A magnified view of the structure at A;

[0035] Fig.10 It is a three-dimensional structural diagram of the regulating cover of the present invention;

[0036] Fig.11 It is a three-dimensional structural diagram of the test block of the present invention;

[0037] Fig.12 This is a three-dimensional structural diagram of the telescopic rod of the present invention;

[0038] Fig.13 It is a cross-sectional structural diagram of the control mechanism of the present invention.

[0039] Figure numerals: 1, mounting base plate; 11, driving motor; 12, driving shaft; 13, fixed bearing; 14, connecting frame; 15, indicator needle; 16, scale line; 17, anti-slip ring; 2, driving mechanism; 20, fixing sleeve; 21, mounting ring; 22, inner gear ring; 23, driving gear; 24, driven gear; 25, planetary carrier; 26, power output shaft; 3, torque adjustment mechanism; 31, adjustment cover; 32, moving plate; 33, first spring; 34, steel ball fixing frame; 35, limiting steel ball; 36, limiting protrusion; 4, test connection mechanism; 40, mounting seat; 41, connecting hole; 42, clamping block; 43, limiting groove; 44, ball; 45, connecting ring; 46, sliding seat; 47. Fixed plate; 48. Second spring; 49. Sliding cavity; 5. Push sleeve; 51. T-ring; 52. Third spring; 53. Anti-skid pad; 6. Power connection mechanism; 61. First electrode seat; 62. Second electrode seat; 63. Fourth spring; 7. Connecting seat; 71. Sliding track; 72. Sliding block; 73. Fixed plate; 74. Limiting frame; 75. Test block; 76. Auxiliary test hole; 77. Positioning block; 78. Telescopic rod; 79. Hydraulic cylinder; 8. Screw rod; 81. Screw rod connector; 82. Engaging groove; 83. Fixed groove; 9. Control mechanism; 91. Hydraulic protection box; 92. Small hydraulic pump station; 93. Oil pipe interface; 94. Main controller; 95. Control panel. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of 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.

[0041] like Figure 1-Figure 4As shown, a screw cycle testing device for a screw rod of the present embodiment comprises a mounting base plate 1, a driving motor 11 is fixedly connected to one side of the upper surface of the mounting base plate 1, a driving shaft 12 is fixedly connected to one side of the driving motor 11, and a driving mechanism 2 is arranged on one side of the driving motor 11; the driving mechanism 2 comprises a fixing sleeve 20 rotatably connected to the driving shaft 12, a mounting ring 21 is rotatably connected inside the fixing sleeve 20, an inner gear ring 22 is fixedly connected inside the mounting ring 21, a driving gear 23 is arranged at the center position of the inner gear ring 22, the driving gear 23 is fixedly connected to the driving shaft 12, a plurality of driven gears 24 are evenly arranged on the outer side of the inner gear ring 22, and the driven gears 24 are respectively connected to the outer sides of the inner gear ring 22. The inner gear ring 22 and the driving gear 23 are meshed for transmission, and a torque adjustment mechanism 3 is provided at the end of the fixed sleeve 20 away from the driving motor 11; the torque adjustment mechanism 3 includes an adjustment cover 31 threadedly connected to the fixed sleeve 20, a movable plate 32 is slidably connected inside the fixed sleeve 20, a first spring 33 is provided on the side of the movable plate 32 away from the adjustment cover 31, a steel ball fixing frame 34 is provided at the end of the first spring 33 away from the movable plate 32, a plurality of limiting steel balls 35 are evenly fixedly installed on the circumference of the steel ball fixing frame 34, a plurality of limiting protrusions 36 are fixedly installed on the mounting ring 21, a power connection mechanism 6 is provided inside the mounting ring 21, and the adjusting cover 31 is rotated, and the adjusting cover 31 moves away from the screw The movement of the rod 8 in the direction makes the adjusting cover 31 drive the moving plate 32 to slide and press the first spring 33, so that the elastic force of the first spring 33 increases. The adjusting cover 31 is rotated in the opposite direction, and the adjusting cover 31 moves in the direction close to the screw rod 8, so that the first spring 33 relaxes and the elastic force decreases. The greater the elastic force of the first spring 33, the greater the pressure applied by the first spring 33 to the steel ball fixing frame 34, and the greater the extrusion force of the limiting steel ball 35 on the mounting ring 21, the greater the torque required for the limiting protrusion 36 on the mounting ring 21 to break through the limiting steel ball 35 when rotating. Therefore, the maximum torque that the screw rod 8 can withstand when rotating is adjusted, which is convenient for the staff to simulate the different torques that the screw rod 8 can withstand in actual use. Situation; a fixed bearing 13 is installed on the outer side of the driving shaft 12, and the driving gear 23 is rotatably connected to a planetary carrier 25 at one end away from the driving shaft 12. The planetary carrier 25 is rotatably connected to multiple driven gears 24 respectively, and a power output shaft 26 is fixedly connected to one side of the planetary carrier 25. The power output shaft 26 is rotatably connected to the adjusting cover 31, and a test connecting mechanism 4 is provided on one side of the adjusting cover 31. The driving shaft 12 drives the driving gear 23 to rotate, and the driving gear 23 drives several driven gears 24 to rotate along the inner ring 22 through meshing. The inner ring 22 is fixed in the mounting ring 21 and cannot rotate. In this way, the input speed of the driving motor 11 is output by the planetary carrier 25 through the movement of several driven gears 24.

[0042] like Figure 1-Figure 8As shown, the test connection mechanism 4 includes a mounting seat 40 rotatably connected to the adjustment cover 31, a connecting hole 41 is provided in the mounting seat 40, a screw connector 81 is slidably connected in the connecting hole 41, and a clamping block 42 is fixedly connected at the upper and lower ends of the connecting hole 41, and clamping grooves 82 are symmetrically provided at both ends of the screw connector 81, and the clamping grooves 82 are slidably connected to the screw connector 81, and fixed grooves 83 are symmetrically provided on both sides of the screw connector 81, and a screw rod 8 is fixedly connected to the side of the screw connector 81 away from the test connection mechanism 4, and the screw connector 81 at one end of the screw rod 8 is fixedly connected to the connecting hole 41 is aligned and inserted, and the locking block 42 is aligned with the locking groove 82, so that the screw connector 81 is fixed in the internal position of the connecting hole 41; the limiting grooves 43 are symmetrically provided on both sides of the mounting seat 40, and the limiting grooves 43 are provided with balls 44 in the locking position; the outer side of the mounting seat 40 is slidably connected with a connecting ring 45, and a sliding seat 46 is provided on one side of the connecting ring 45. The sliding seat 46 is slidably connected with the mounting seat 40, and the two sides of the sliding seat 46 are symmetrically fixedly connected with fixing plates 47, and the position of the fixing plate 47 corresponds to the position of the limiting groove 43. The sliding seat 46 is installed with a second spring 48 on the side away from the connecting ring 45. The rod connector 81 pushes the ball 44, and the ball 44 moves toward the fixing plate 47. The fixing plate 47 squeezes the second spring 48. When the fixing groove 83 slides to the position corresponding to the ball 44, the second spring 48 pushes the slide 46 outward, and the slide 46 drives the fixing plate 47 to squeeze the ball 44, so that the ball 44 is engaged in the fixing groove 83, so that the screw connector 81 is fixed in the connecting hole 41; a sliding cavity 49 is provided in the mounting seat 40, and a pushing sleeve 5 is slidably installed on the outer side of the mounting seat 40, and a T-shaped ring 51 is fixedly connected to the pushing sleeve 5 away from the engaging block 42. The T-shaped ring 51 is connected to the sliding The cavity 49 is slidably connected, and a third spring 52 is arranged in the sliding cavity 49. An anti-slip pad 53 is fixedly connected to the outside of the pushing sleeve 5. The pushing sleeve 5 can drive the connecting ring 45 and the sliding seat 46 to move in the direction of the T-shaped ring 51, so that the ball 44 has a certain movable space in the front and back of the limiting groove 43. The screw rod 8 is taken out, and the fixing groove 83 slides outward. The ball 44 can slide toward the outside of the limiting groove 43 near the connection hole 41. The ball 44 is separated from the fixing groove 83, thereby releasing the fixation of the position of the screw connector 81, thereby facilitating the staff to test screw rods 8 of different specifications or types.

[0043] like Figure 1-Figure 10As shown, the power connection mechanism 6 includes a first electrode seat 61 fixedly connected to the limiting steel ball 35, a plurality of second electrode seats 62 are slidably connected in the mounting ring 21, a fourth spring 63 is fixedly installed at the lower end of the second electrode seat 62, the first electrode seat 61 and the second electrode seat 62 are electrically connected to the drive motor 11, after the screw rod 8 is subjected to excessive torque, the inner gear ring 22 rotates so that the limiting steel ball 35 cannot stop the rotation of the mounting ring 21 through the limiting protrusion 36, so that the first electrode seat 61 and the second electrode seat 62 are separated, so that the drive motor 11 is powered off, and the screw rod 8 stops rotating for testing, avoiding the excessive torque. The screw rod 8 is damaged or the workpiece is damaged due to the application of torque; a connecting frame 14 is fixedly installed on the outside of the fixing sleeve 20, and the connecting frame 14 is fixedly connected to the mounting base plate 1, and an indicator needle 15 is fixedly provided on the fixing sleeve 20, and a scale line 16 is provided on the adjusting cover 31, and an anti-slip ring 17 is fixedly connected to the outer ring of the adjusting cover 31. The staff can adjust the torque of the test device through the scale line 16 provided on the adjusting cover 31 indicated by the indicator needle 15, which is convenient for the staff to observe, and the anti-slip ring 17 also increases the friction coefficient of the outer side of the adjusting cover 31 to prevent the outer wall of the adjusting cover 31 from being too smooth and difficult to rotate.

[0044] like Figure 1-Figure 13As shown, a connecting seat 7 is fixedly connected to the upper surface of the mounting base plate 1, and a sliding track 71 is symmetrically fixed to the upper surface of the connecting seat 7. A slider 72 is slidably connected to the sliding track 71, and a fixing plate 73 is fixedly installed on the upper surface of the slider 72. A limit frame 74 is fixedly connected to the fixing plate 73, and a test block 75 is arranged in the limit frame 74. An auxiliary test hole 76 is opened in the test block 75, and a positioning block 77 is fixedly connected to the lower end of the fixing plate 73. A telescopic rod 78 is fixedly connected to one side of the positioning block 77. The telescopic rod 78 is slidably connected to a hydraulic cylinder 79, and the hydraulic cylinder 79 is fixedly connected to the connecting seat 7 at one end away from the telescopic rod 78. When testing, the hydraulic cylinder 79 sends the test block 75 to the front end of the screw rod 8 through the telescopic rod 78, and the screw rod 8 is rotated to align with the auxiliary test hole 76, so that the test block 75 is aligned with the auxiliary test hole 76. The screw rods 8 are threadedly connected to each other, so as to test the number of cycles and test speed of the screw rods 8; a control mechanism 9 is installed on the upper surface of the mounting base 1 away from the connecting seat 7, and the control mechanism 9 includes a hydraulic protection box 91 fixedly installed with the mounting base 1, and a small hydraulic pump station 92 is arranged in the hydraulic protection box 91, and an oil pipe interface 93 is fixedly arranged on the upper end of the small hydraulic pump station 92, and a main controller 94 is arranged on one side of the hydraulic protection box 91, and the main controller 94 is fixedly connected to the mounting base 1, and a control panel 95 is installed on one side of the main controller 94. The small hydraulic pump station 92 serves as a hydraulic power unit, which can be connected to the hydraulic cylinder 79 through a hydraulic oil pipe and provide hydraulic power to it during operation. At the same time, the staff can observe the test results intuitively through the control panel 95 on the main controller 94.

[0045] The working principle of this embodiment is as follows: align the screw connector 81 at one end of the screw rod 8 with the connecting hole 41 and insert it, and align the snap block 42 with the snap groove 82 at the same time, so that the screw connector 81 is fixed in the connecting hole 41. When the screw connector 81 enters the connecting hole 41, it is introduced by the snap block 42, and the screw connector 81 pushes the ball 44, and the ball 44 moves toward the fixing plate 47, and the fixing plate 47 squeezes the second spring 48. When the fixing groove 83 slides to the position corresponding to the ball 44, the second spring 48 pushes the slide seat 46 outward, and the slide seat 46 drives the fixing plate 47 to squeeze the ball 44, so that the ball 44 is snapped into the fixing groove 83, so that the screw connector 81 is fixed in the connecting hole 41.

[0046] When it is necessary to replace and test other types of threaded rods, the push sleeve 5 is slid, and the push sleeve 5 drives the connecting ring 45 and the sliding seat 46 to move in the direction of the T-shaped ring 51, so that the ball 44 has a certain amount of activity space in the limiting groove 43, and the screw rod 8 is taken out, and the fixing groove 83 slides outward, so that the ball 44 slides toward the outside of the limiting groove 43 near the connection hole 41, and the ball 44 is separated from the fixing groove 83, thereby releasing the fixation of the screw rod connector 81, so that the screw rod 8 can be taken out of the mounting seat 40 for replacement;

[0047] During the test, the drive motor 11 is started, the drive shaft 12 drives the drive gear 23 to rotate, and the drive gear 23 drives a plurality of driven gears 24 to rotate along the inner gear ring 22 through meshing, and the inner gear ring 22 is fixed in the mounting ring 21 and cannot rotate, so that the input speed of the drive motor 11 is output by the planet carrier 25 through the movement of the plurality of driven gears 24, and the planet carrier 25 drives the power output shaft 26 to rotate, and the power output shaft 26 is fixed to the mounting seat 40, so that the rotation of the mounting seat 40 can drive the screw rod 8 to rotate, thereby realizing the rotation cycle test of the screw rod 8;

[0048] When the screw rod 8 is rotating to perform the cycle number test, when the torque applied to the screw rod 8 in the cycle is about to exceed the maximum test torque that the screw rod 8 can withstand, the rotation of the screw rod 8 is hindered, so that the rotation of the planetary carrier 25 driven by the drive shaft 12 is hindered, and the inner gear ring 22 is strained, so that the inner gear ring 22 has a tendency to rotate. The reason why the inner gear ring 22 temporarily does not rotate is that the first spring 33 pushes the limiting steel ball 35 on the steel ball fixing frame 34 to press the mounting ring 21, thereby limiting the movement of the inner gear ring 22. When the torque applied to the screw rod 8 during the test in the test block 75 is too large and stops rotating, the force applied to the inner gear ring 22 is sufficient to counteract the force applied to the limiting steel ball 35 by the first spring 33, and the mounting ring 21 begins to rotate in the fixing sleeve 20. At this time, the screw rod 8 causes the power output shaft 26 to drive the planetary carrier 25 to stop rotating through the mounting seat 40, thereby avoiding the phenomenon of breakage and damage caused by excessive torque on the screw rod 8.

[0049] When it is necessary to adjust the torque exerted on the screw rod 8 during the test, the adjusting cover 31 is rotated and the adjusting cover 31 moves in the direction away from the screw rod 8, so that the adjusting cover 31 drives the movable plate 32 to slide and press the first spring 33, thereby increasing the elastic force of the first spring 33. The adjusting cover 31 is rotated in the opposite direction and moves in the direction close to the screw rod 8, thereby relaxing the first spring 33 and reducing its elastic force. The greater the elastic force of the first spring 33, the greater the pressure exerted by the first spring 33 on the steel ball fixing frame 34, and the greater the extrusion pressure of the limiting steel ball 35 on the mounting ring 21. The greater the torque required for the limiting protrusion 36 on the mounting ring 21 to break through the limiting steel ball 35 when rotating is also required to become greater. The elastic force of the first spring 33 is adjusted to finally be converted into the embodiment of the maximum torque that the screw rod 8 can be subjected to.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A screw cycle testing device for a screw rod, comprising a mounting base plate (1), characterized in that: A drive motor (11) is fixedly connected to one side of the upper surface of the mounting base plate (1), a drive shaft (12) is fixedly connected to one side of the drive motor (11), and a drive mechanism (2) is provided on one side of the drive motor (11); The driving mechanism (2) comprises a fixed sleeve (20) rotatably connected to the driving shaft (12), a mounting ring (21) rotatably connected inside the fixed sleeve (20), an inner gear ring (22) fixedly connected inside the mounting ring (21), a driving gear (23) arranged at the center of the inner gear ring (22), the driving gear (23) being fixedly connected to the driving shaft (12), a plurality of driven gears (24) being evenly arranged on the outer side of the inner gear ring (22), the two sides of the driven gear (24) respectively meshing with the inner gear ring (22) and the driving gear (23), and a torque adjustment mechanism (3) being arranged at one end of the fixed sleeve (20) away from the driving motor (11); The torque adjustment mechanism (3) comprises an adjustment cover (31) threadedly connected to the fixing sleeve (20), a moving plate (32) being slidably connected inside the fixing sleeve (20), a first spring (33) being arranged on the side of the moving plate (32) away from the adjustment cover (31), a steel ball fixing frame (34) being arranged on the end of the first spring (33) away from the moving plate (32), a plurality of limiting steel balls (35) being evenly fixedly mounted on the circumference of the steel ball fixing frame (34), a plurality of limiting protrusions (36) being fixedly mounted on the mounting ring (21), and a power supply connection mechanism (6) being arranged inside the mounting ring (21); A fixed bearing (13) is installed on the outside of the drive shaft (12); one end of the drive gear (23) away from the drive shaft (12) is rotatably connected to a planet carrier (25); the planet carrier (25) is rotatably connected to a plurality of driven gears (24) respectively; one side of the planet carrier (25) is fixedly connected to a power output shaft (26); the power output shaft (26) is rotatably connected to an adjustment cover (31); and one side of the adjustment cover (31) is provided with a test connection mechanism (4); The test connection mechanism (4) comprises a mounting seat (40) rotatably connected to the adjustment cover (31), a connection hole (41) is provided in the mounting seat (40), a screw connection head (81) is slidably connected in the connection hole (41), a clamping block (42) is fixedly connected at the upper and lower ends of the connection hole (41), clamping grooves (82) are symmetrically provided at both ends of the screw connection head (81), the clamping grooves (82) are slidably connected to the screw connection head (81), fixing grooves (83) are symmetrically provided on both sides of the screw connection head (81), and a screw rod (8) is fixedly connected to the side of the screw connection head (81) away from the test connection mechanism (4); The mounting seat (40) has symmetrically disposed limiting grooves (43) on both sides, and balls (44) are arranged in the limiting grooves (43). A connecting ring (45) is slidably connected to the outside of the mounting seat (40), and a sliding seat (46) is arranged on one side of the connecting ring (45). The sliding seat (46) is slidably connected to the mounting seat (40). Fixed plates (47) are symmetrically fixedly connected to both sides of the sliding seat (46), and the position of the fixed plates (47) corresponds to the position of the limiting grooves (43). A second spring (48) is arranged on the mounting sleeve of the side of the sliding seat (46) away from the connecting ring (45); A sliding cavity (49) is provided in the mounting seat (40), a push sleeve (5) is slidably mounted on the outer side of the mounting seat (40), a T-shaped ring (51) is fixedly connected to the side of the push sleeve (5) away from the locking block (42), the T-shaped ring (51) is slidably connected to the sliding cavity (49), a third spring (52) is provided in the sliding cavity (49), and an anti-skid pad (53) is fixedly connected to the outer side of the push sleeve (5).

2. A screw cycle testing device for a screw rod according to claim 1, characterized in that: The power connection mechanism (6) comprises a first electrode seat (61) fixedly connected to the limiting steel ball (35), a plurality of second electrode seats (62) are slidably connected in the mounting ring (21), and a fourth spring (63) is fixedly mounted at the lower end of the second electrode seat (62).

3. A screw cycle testing device for a screw rod according to claim 1, characterized in that: A connecting frame (14) is fixedly mounted on the outside of the fixing sleeve (20), the connecting frame (14) is fixedly connected to the mounting base plate (1), an indicating needle (15) is fixedly arranged on the fixing sleeve (20), a scale line (16) is provided on the adjusting cover (31), and an anti-slip ring (17) is fixedly connected to the outer ring of the adjusting cover (31).

4. A screw cycle testing device for a screw rod according to claim 1, characterized in that: A connecting seat (7) is fixedly connected to the upper surface of the mounting base plate (1), a sliding track (71) is symmetrically fixed to the upper surface of the connecting seat (7), a sliding block (72) is slidably connected to the sliding track (71), a fixing plate (73) is fixedly installed on the upper surface of the sliding block (72), a limiting frame (74) is fixedly connected to the fixing plate (73), a test block (75) is arranged in the limiting frame (74), an auxiliary test hole (76) is provided in the test block (75), a positioning block (77) is fixedly connected to the lower end of the fixing plate (73), a telescopic rod (78) is fixedly connected to one side of the positioning block (77), the telescopic rod (78) is slidably connected to a hydraulic cylinder (79), and an end of the hydraulic cylinder (79) away from the telescopic rod (78) is fixedly connected to the connecting seat (7).

5. A screw cycle testing device for a screw rod according to claim 1, characterized in that: A control mechanism (9) is installed on the upper surface of the mounting base plate (1) at a side away from the connecting seat (7), and the control mechanism (9) comprises a hydraulic protection box (91) fixedly mounted on the mounting base plate (1), a small hydraulic pump station (92) is arranged in the hydraulic protection box (91), and an oil pipe interface (93) is fixedly arranged at the upper end of the small hydraulic pump station (92), a main controller (94) is arranged on one side of the hydraulic protection box (91), and the main controller (94) is fixedly connected to the mounting base plate (1), and a control panel (95) is installed on one side of the main controller (94).

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