Tensile machine for testing load value of nut

Abstract

A tensile machine for testing a nut load value disclosed by the present invention comprises a tensile machine body, a PLC controller is fixedly installed on the side surface of the tensile machine body, a servo motor is fixedly installed at the top of the tensile machine body, the output end of the servo motor is fixedly connected with a threaded rod, the surface of the threaded rod is in threaded connection with a threaded sleeve plate, and the threaded sleeve plate is fixedly connected with a nut. The bottom of the threaded sleeve plate is fixedly connected with an upper pulling plate, and the side face of the upper pulling plate is connected with a limiting assembly. Through cooperation of the above structures, accurate distance positioning of an experiment nut and an experiment screw rod is realized through arrangement of installation structures such as a nut sleeve buckle, pulling of downward pressing of single plates on the two sides, upward pressing of the single plates on the two sides and clamping of the upper and lower positions can be obtained through the adjustable reversing clamping plate, protection of the explosion-proof plate on the test nut is increased, and the test efficiency is improved. The force application detection mode of the load of the test nut is improved, and convenience is brought to the work of workers.

Description

Technical Field

[0001] The invention relates to the technical field of nut testing, in particular to a tensile testing machine for testing a nut load value. Background Art

[0002] A nut is a fixing tool with a hole in the center and threads on the inside of the hole. Nuts are often used in conjunction with screws of matching size to fix related joints. The guaranteed load of a nut refers to the condition that the nut does not undergo plastic deformation under a specified preload. Therefore, it is necessary to test the load value of the nut before using it. Since the tensile testing machine now lifts the test nut by squeezing, the nut can only be pushed by applying force on a horizontal plane, resulting in a relatively single way of testing the nut load. However, in actual use, the force on the test nut cannot be subjected to only vertical force. Therefore, it is necessary to increase the diversity of the nut load test, which has brought certain adverse effects on actual use and therefore needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a tensile testing machine for testing the load value of a nut. The machine has mounting structures such as nut sleeves for accurately positioning the distance between the test nut and the test screw. The single plates on both sides can be pressed down, the single plates on both sides can be pressed up, and the upper and lower positions can be clamped. An explosion-proof plate is added to protect the test nut, and the force detection method for the test nut load is improved, which brings convenience to the work of the staff, has a certain beneficial effect on actual use, and solves the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a tensile testing machine for testing the load value of a nut, comprising a tensile testing machine body, a PLC controller fixedly installed on the side of the tensile testing machine body, a servo motor fixedly installed on the top of the tensile testing machine body, a threaded rod fixedly connected to the output end of the servo motor, a threaded sleeve threadedly connected to the surface of the threaded rod, an upper pull plate fixedly connected to the bottom of the threaded sleeve, a side of the upper pull plate is connected to a limiting component, a driving motor 1 is fixedly installed on the lower surface of the upper pull plate through a bracket, a screw rod fixedly connected to the output end of the driving motor 1, a nut seat is connected to the surface of the screw rod, a guide rod is fixedly connected to the front side of the nut seat, a guide groove is provided on the front side of the upper pull plate, the inner wall of the guide groove is slidably connected to the surface of the guide rod, an adjustment frame is fixedly connected to the bottom of the nut seat, and the adjustment The inner wall of the frame is rotatably connected to a rotating rod through a bearing, one end of the rotating rod is fixedly connected to an active bevel gear, the surface of the inner wall of the adjusting frame is rotatably connected to a bidirectional screw through a bearing, the middle of the bidirectional screw is fixedly connected to a driven bevel gear, the surface of the driven bevel gear is meshingly connected with the surface of the active bevel gear, the different threads on the bidirectional screw are respectively threaded with matching internal threaded plates, the surface of the internal threaded plate is fixedly connected to a moving plate, the surface of the inner wall of the adjusting frame is provided with a moving groove, the inner wall of the moving groove is slidably connected to the surface of the moving plate, and a reversing clamping plate is fixedly connected to one side of the internal threaded plate, a base is fixedly installed at the bottom of the inner wall of the tensile machine body, a driving motor 2 is fixedly installed inside the base, the output end of the driving motor 2 is fixedly connected to a placing frame, and the inside of the placing frame is connected to a side clamping plate through the driving end.

[0005] Preferably, the limiting assembly includes a limiting plate and a limiting groove, the limiting plate is fixedly connected to the side of the upper pulling plate, the limiting groove is opened on the side of the inner wall of the tensile machine body, and the inner wall of the limiting groove is slidably connected to the surface of the limiting plate.

[0006] Preferably, a locking slot plate is fixedly connected to the top of the pull-up plate, and an explosion-proof plate is fixedly connected to the surface of the locking slot plate.

[0007] Preferably, the top of the explosion-proof plate is a fixed plate, and the surface of the fixed plate is rotatably connected to a flame-retardant plate via a hinge.

[0008] Preferably, a slot plate is fixedly connected to the lower surface of the upper pull plate near the middle thereof, and a nut buckle is clamped on the inner wall of the slot plate.

[0009] Preferably, there are two adjusting frames, and the driving motors on the two adjusting frames are not connected to each other.

[0010] Preferably, the main body of the reversing clamp is a groove plate, the interior of the groove plate is rotatably connected to a reversing round rod through a bearing, the surface of the reversing round rod is fixedly connected to an anti-slip clamp, a cross slot is opened inside the reversing round rod, a positioning rod is clamped on the surface of the groove plate, and the positioning rod passes through the inner wall of the cross slot.

[0011] Preferably, a wear-resistant pad is fixedly connected inside the anti-slip clamp, and an elastic abutment plate is fixedly connected to one side of the anti-slip clamp.

[0012] Preferably, a camera is fixedly mounted on the surface of the inner wall of the tensile machine body, and the camera is located on the side of the placement frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Sleeve the test nut on the test screw, and clip the matching nut buckle into the slot plate for fixing. The slot plate and the nut buckle can be used to sleeve and fix the test nut of suitable specifications. The second start of the driving motor can drive the test screw to rotate. The test nut in the downward pressing process can complete the sleeve of the test screw;

[0015] 2. The servo motor can drive the threaded rod to rotate when it is started. Under the action of the limit assembly, the rotation of the threaded rod can drive the threaded sleeve plate and the upper pull plate to adjust the upper and lower positions. When testing the nut load, the drive motor can drive the screw rod to rotate as soon as it is started. The rotation of the screw rod can drive the nut seat on it to move horizontally. Under the guidance of the guide rod and the guide groove, the subsequent nut seat is placed in the event of shaking and deflection during the pulling process. The movement of the nut seat can drive the adjustment frame to move. The rotating rod is manually rotated to rotate. Through the reversing action of the active bevel gear and the driven bevel gear, the rotating rod The rotation drives the bidirectional screw to rotate. Under the restriction of the moving plate and the moving groove, the rotation of the bidirectional screw can drive the internal thread plates on different threads to move, and drive the reversing clamping plate on it to approach the experimental nut for clamping. The staff can rotate the reversing round rod to drive the anti-slip clamping plate to reverse. After the reversal of the anti-slip clamping plate is completed, the staff can insert the positioning rod through the inside of the cross slot and fix it on the groove plate, and the single plates on both sides can be pressed down, the single plates on both sides can be pressed up, and the upper and lower positions can be clamped. The tensile machine body can obtain experimental data according to the tensile test and record it later;

[0016] 3. Before the experiment, the staff can connect the explosion-proof plate to the locking slot plate for fixing to ensure personal protection of the staff, and the process of the nut load test can be recorded by the camera for subsequent experimental data comparison. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a front cross-sectional view of the present invention;

[0018] Figure 2 It is a back view of the explosion-proof plate of the present invention;

[0019] Figure 3 It is a front cross-sectional view of the adjustment frame of the present invention;

[0020] Figure 4 A top view of the nut buckle of the present invention;

[0021] Figure 5 A top cross-sectional view of the reversing round rod of the present invention;

[0022] Figure 6 It is an enlarged view of point A of the present invention;

[0023] Figure 7 It is an enlarged view of B of the present invention;

[0024] Figure 8 It is an enlarged view of location C of the present invention.

[0025] In the figure: 1- tensile machine body, 2- PLC controller, 3- servo motor, 4- threaded rod, 5- threaded sleeve, 6- upper pull plate, 7- driving motor 1, 8- screw rod, 9- nut seat, 10- guide rod, 11- guide groove, 12- adjustment frame, 13- rotating rod, 14- driving bevel gear, 15- bidirectional screw, 16- driven bevel gear, 17- internal thread plate, 18- moving plate, 19- moving groove, 20- reversing clamping plate , 21-base, 22-drive motor 2, 23-placement frame, 24-side clamp, 25-limit plate, 26-limit slot, 27-locking slot plate, 28-explosion-proof plate, 29-fixed plate, 30-flame retardant plate, 31-slot plate, 32-nut buckle, 33-groove plate, 34-reversing round rod, 35-anti-slip clamp, 36-cross slot, 37-positioning rod, 38-wear-resistant pad, 39-elastic back plate, 40-camera. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figures 1 to 8The present invention provides a technical solution: a tensile testing machine for testing the load value of a nut, comprising a tensile testing machine body 1, a PLC controller 2 is fixedly installed on the side of the tensile testing machine body 1, a servo motor 3 is fixedly installed on the top of the tensile testing machine body 1, a threaded rod 4 is fixedly connected to the output end of the servo motor 3, a threaded sleeve 5 is threadedly connected to the surface of the threaded rod 4, an upper pull plate 6 is fixedly connected to the bottom of the threaded sleeve 5, a side of the upper pull plate 6 is connected to a limiting component, a driving motor 7 is fixedly installed on the lower surface of the upper pull plate 6 through a bracket, a screw rod 8 is fixedly connected to the output end of the driving motor 7, a nut seat 9 is connected to the surface of the screw rod 8, a guide rod 10 is fixedly connected to the front side of the nut seat 9, a guide groove 11 is opened on the front side of the upper pull plate 6, the inner wall of the guide groove 11 is slidably connected to the surface of the guide rod 10, an adjusting frame 12 is fixedly connected to the bottom of the nut seat 9, and the inner wall of the adjusting frame 12 is rotatably connected to a rotating rod through a bearing 13. One end of the rotating rod 13 is fixedly connected with an active bevel gear 14. The surface of the inner wall of the adjusting frame 12 is rotatably connected with a bidirectional screw 15 through a bearing. The middle part of the bidirectional screw 15 is fixedly connected with a driven bevel gear 16. The surface of the driven bevel gear 16 is meshed with the surface of the active bevel gear 14. Different threads on the bidirectional screw 15 are respectively threadedly connected with matching internal thread plates 17. The surface of the internal thread plate 17 is fixedly connected with a moving plate 18. A moving groove 19 is provided on the surface of the inner wall of the adjusting frame 12. The inner wall of the moving groove 19 is slidably connected with the surface of the moving plate 18. A reversing clamping plate 20 is fixedly connected to one side of the internal thread plate 17. A base 21 is fixedly installed at the bottom of the inner wall of the tensile machine body 1. A driving motor 22 is fixedly installed inside the base 21. The output end of the driving motor 22 is fixedly connected with a placement frame 23. The inside of the placement frame 23 is connected with a side clamping plate 24 through the driving end.

[0028] Furthermore, the limiting assembly includes a limiting plate 25 and a limiting groove 26. The limiting plate 25 is fixedly connected to the side of the upper pulling plate 6. The limiting groove 26 is arranged on the side of the inner wall of the tensile machine body 1. The inner wall of the limiting groove 26 and the surface of the limiting plate 25 are slidably connected. Through the setting of the limiting plate 25 and the limiting groove 26, the movement trajectory of the threaded sleeve 5 is limited, so that the rotation of the threaded rod 4 can drive the threaded sleeve 5 to move.

[0029] Furthermore, the top of the pull-up plate 6 is fixedly connected with a locking slot plate 27, and the surface of the locking slot plate 27 is fixedly connected with an explosion-proof plate 28. The top of the explosion-proof plate 28 is a fixed plate 29, and the surface of the fixed plate 29 is rotatably connected with a flame-retardant plate 30 through a hinge. Before the experiment, the staff can connect the explosion-proof plate 28 to the locking slot plate 27 for fixing, ensuring personal protection of the staff.

[0030] Furthermore, a slot plate 31 is fixedly connected to the lower surface of the upper pull plate 6 near its middle, and a nut buckle 32 is clamped on the inner wall of the slot plate 31. The nut buckle 32 can be connected under the connection of the slot plate 31, which is convenient for manual positioning of the precise length of the experimental screw and the experimental nut.

[0031] Furthermore, there are two adjustment frames 12, and the driving motors 7 on the two adjustment frames 12 are not connected to each other, and the positions of the adjustment frames 12 can be adjusted simultaneously in a time-sharing manner.

[0032] Furthermore, the main body of the reversing clamp 20 is a groove plate 33, the interior of the groove plate 33 is rotatably connected with a reversing round rod 34 through a bearing, the surface of the reversing round rod 34 is fixedly connected with an anti-skid clamp 35, the interior of the reversing round rod 34 is provided with a cross slot 36, the surface of the groove plate 33 is clamped with a positioning rod 37, and the positioning rod 37 passes through the inner wall of the cross slot 36. The interior of the anti-skid clamp 35 is fixedly connected with a wear pad 38, and one side of the anti-skid clamp 35 is fixedly connected with an elastic abutment plate 39. The reversing round rod 34 is rotated to drive the anti-skid clamp 35 to reverse. After the reversal of the anti-skid clamp 35 is completed, the staff can insert the positioning rod 37 through the interior of the cross slot 36 and fix it on the groove plate 33, so that the single plates on both sides are pressed down, the single plates on both sides are pressed down, and the upper and lower positions are clamped. Under the setting of the wear pad 38 and the elastic abutment plate 39, the pressure resistance and wear resistance of the anti-skid clamp 35 can be enhanced.

[0033] Furthermore, a camera 40 is fixedly mounted on the surface of the inner wall of the tensile machine body 1 , and the camera 40 is located on the side of the placement frame 23 . The process of the nut load test can be recorded by the camera 40 for subsequent experimental data comparison.

[0034] Working principle: When the tensile testing machine for testing the load value of nuts is in use, the staff can first place the test screw in the placement frame 23, and the swing of the side clamping plate 24 under the control of the driving end can clamp and fix the used screw, and then the test nut is sleeved on the test screw, and the matching nut buckle 32 is clamped in the slot plate 31 for fixation. The start of the driving motor 22 can drive the test screw to rotate, and the test nut in the downward pressing process can complete the upper sleeve of the test screw, and then the staff can start the servo motor 3, and the start of the servo motor 3 can drive the threaded rod 4 to rotate, and the movement trajectory of the threaded sleeve plate 5 is controlled by the setting of the limit plate 25 and the limit groove 26. The limit is set, so that the rotation of the threaded rod 4 can drive the threaded sleeve 5 to move, and then drive the upper pull plate 6 to adjust the up and down position, and then drive the nut sleeve buckle 32 to one end of the position, lock the nut sleeve buckle 32 to make it locked and anti-slip, and then the upper pull plate 6 controlled by the driving end moves down, and at the same time, the driving motor 22 is started to drive the placement frame 23 and the experimental screw to rotate, and the experimental nut is rotated to the appropriate position of the experimental screw, and the nut sleeve buckle 32 is removed for temporary storage. When testing the nut load, the staff can start the driving motor 1 7, and the driving motor 1 7 can drive the screw rod 8 to rotate, and the rotation of the screw rod 8 can drive the nut seat 9 on it to move horizontally Move, under the guidance of the guide rod 10 and the guide groove 11, the subsequent nut seat 9 is placed in the process of pulling. When there is shaking and deflection, the movement of the nut seat 9 can drive the adjustment frame 12 to move, and the manual rotation of the rotating rod 13 can drive the active bevel gear 14 to rotate, and the rotation of the rotating rod 13 can drive the active bevel gear 14 to rotate, and the rotation of the active bevel gear 14 can drive the driven bevel gear 16 to rotate, and the rotation of the driven bevel gear 16 can drive the bidirectional screw 15 to rotate. Under the limiting effect of the moving plate 18 and the moving groove 19, the rotation of the bidirectional screw 15 can drive the internal thread plate 17 on different threads to move, and drive the reversing clamping plate 20 thereon to approach the experimental nut for clamping, and the working Personnel can rotate the reversing round rod 34 to drive the anti-skid splint 35 to reverse. After the reversal of the anti-skid splint 35 is completed, the staff can insert the positioning rod 37 through the inside of the cross slot 36 and fix it on the groove plate 33, so as to obtain the pulling of the single plates on both sides being pressed down, the single plates on both sides being pressed up, and the upper and lower positions being clamped. The tensile machine body 1 can obtain experimental data according to the tensile test and record it later. Before the experiment, the staff can connect the explosion-proof plate 28 to the locking groove plate 27 for fixation to ensure the personal protection of the staff, and the process of the nut load test can be recorded by the camera 40 for subsequent experimental data comparison, which brings convenience to the work of the staff.

[0035] 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 tensile testing machine for testing the load value of a nut, comprising a tensile testing machine body (1), a PLC controller (2) being fixedly mounted on the side of the tensile testing machine body (1), characterized in that: A servo motor (3) is fixedly installed on the top of the tensile machine body (1); the output end of the servo motor (3) is fixedly connected to a threaded rod (4); the surface of the threaded rod (4) is threadedly connected to a threaded sleeve (5); the bottom of the threaded sleeve (5) is fixedly connected to an upper pull plate (6); the side of the upper pull plate (6) is connected to a limiting component; a driving motor (7) is fixedly installed on the lower surface of the upper pull plate (6) via a bracket; the output end of the driving motor (7) is fixedly connected to a screw rod (8); The surface of the screw rod (8) is connected to a nut seat (9), the front side of the nut seat (9) is fixedly connected to a guide rod (10), the front side of the upper pull plate (6) is provided with a guide groove (11), the inner wall of the guide groove (11) and the surface of the guide rod (10) are slidably connected, the bottom of the nut seat (9) is fixedly connected to an adjustment frame (12), the inner wall of the adjustment frame (12) is rotatably connected to a rotating rod (13) through a bearing, and one end of the rotating rod (13) is fixedly connected to an active bevel gear (14), The surface of the inner wall of the adjusting frame (12) is rotatably connected to a bidirectional screw (15) via a bearing, a driven bevel gear (16) is fixedly connected to the middle of the bidirectional screw (15), the surface of the driven bevel gear (16) is meshingly connected to the surface of the driving bevel gear (14), and different threads on the bidirectional screw (15) are respectively threadedly connected to matching internal thread plates (17), and a moving plate (18) is fixedly connected to the surface of the internal thread plate (17). The surface of the inner wall of the adjusting frame (12) is provided with A movable groove (19) is provided, the inner wall of the movable groove (19) is slidably connected to the surface of the movable plate (18), a reversing clamp (20) is fixedly connected to one side of the internal thread plate (17), a base (21) is fixedly installed at the bottom of the inner wall of the tensile machine body (1), a second drive motor (22) is fixedly installed inside the base (21), an output end of the second drive motor (22) is fixedly connected to a placement frame (23), and the inside of the placement frame (23) is connected to a side clamp (24) through the driving end.

2. A tensile testing machine for testing nut load value according to claim 1, characterized in that: The limiting assembly comprises a limiting plate (25) and a limiting groove (26); the limiting plate (25) is fixedly connected to the side of the upper pulling plate (6); the limiting groove (26) is arranged on the side of the inner wall of the tensile machine body (1); the inner wall of the limiting groove (26) and the surface of the limiting plate (25) are slidably connected.

3. A tensile testing machine for testing nut load value according to claim 1, characterized in that: The top of the upper pull plate (6) is fixedly connected with a locking groove plate (27), and the surface of the locking groove plate (27) is fixedly connected with an explosion-proof plate (28).

4. A tensile testing machine for testing nut load value according to claim 3, characterized in that: The top of the explosion-proof plate (28) is a fixed plate (29), and the surface of the fixed plate (29) is rotatably connected to a flame-retardant plate (30) via a hinge.

5. A tensile testing machine for testing nut load value according to claim 1, characterized in that: A slot plate (31) is fixedly connected to the lower surface of the upper pull plate (6) near the middle thereof, and a nut buckle (32) is clamped on the inner wall of the slot plate (31).

6. A tensile testing machine for testing nut load value according to claim 1, characterized in that: The number of the regulating frames (12) is two, and the driving motors (7) on the two regulating frames (12) are not connected to each other.

7. A tensile testing machine for testing nut load value according to claim 1, characterized in that: The main body of the reversing clamping plate (20) is a groove plate (33), the interior of the groove plate (33) is rotatably connected to a reversing round rod (34) via a bearing, the surface of the reversing round rod (34) is fixedly connected to an anti-slip clamping plate (35), the interior of the reversing round rod (34) is provided with a cross slot (36), the surface of the groove plate (33) is clamped with a positioning rod (37), and the positioning rod (37) passes through the inner wall of the cross slot (36).

8. A tensile testing machine for testing nut load value according to claim 7, characterized in that: A wear-resistant pad (38) is fixedly connected inside the anti-slip cleat (35), and an elastic abutment plate (39) is fixedly connected to one side of the anti-slip cleat (35).

9. A tensile testing machine for testing nut load value according to claim 1, characterized in that: A camera (40) is fixedly mounted on the surface of the inner wall of the tensile machine body (1), and the camera (40) is located on the side of the placement frame (23).

Images