Twisting and pulling force testing device for bolt and nut assembly

Abstract

The utility model discloses a bolt and nut assembly torsional force test device which comprises a workbench, and the left side of the top of the workbench is connected with a supporting plate in a sliding mode. The bolt and the nut are locked in the inner cavities of the first mounting ring and the second mounting ring, meanwhile, the driving motor is started to drive the gear ring to rotate, the gear ring can drive the first mounting ring to rotate, at the moment, the first mounting ring can drive the bolt to move towards the inner cavity of the nut, the bolt continues to rotate until the rotating torque reaches a set value, and then the nut is locked. When the bolt is not broken, the connection torque of the bolt and the nut is qualified, then the hydraulic telescopic rod extends out to be inserted into the inner cavity of the sleeve and is inserted into the pin rod, then the hydraulic telescopic rod can be retracted, the hydraulic telescopic rod can drive the supporting plate to move, and the supporting plate can drive the bolt to move; when the tensile force reaches qualified force and the bolt is not separated from the nut, the tensile force of the bolt and the nut is qualified.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a torsion and tension testing device for a bolt and nut assembly. Background Art

[0002] The most widely used threaded fastener is the bolt-nut connection. During a bolt-nut connection, a preload is often required between the bolt and nut to improve the reliability and loosening resistance of the bolted connection. In the case of threaded fasteners, lack of preload or insufficient preload will not effectively connect the components. However, excessive preload can cause the bolt to deform or even break, leading to failure of the threaded connection. During the actual installation of threaded fasteners, the preload is typically controlled within an appropriate range using torque control according to the corresponding torsion-tension coefficient. Therefore, torsion-tension testing is required during the production of bolt-nut assemblies. Utility Model Content

[0003] The purpose of the utility model is to provide a bolt and nut assembly torsion and tension testing device, which has the advantage of being easy to use and solves the problems raised by the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bolt and nut assembly torsion and tension testing device, comprising a workbench, a support plate is slidably connected to the left side of the top of the workbench, a bearing seat is fixedly connected to the left side of the top of the support plate, a first mounting ring is fixedly connected to the inner cavity of the bearing seat, a gear ring is fixedly connected to the surface of the first mounting ring, a driving gear is meshed with the bottom of the gear ring, a reducer is fixedly connected to the left side of the driving gear, a drive motor is fixedly connected to the left side of the reducer, the drive motor passes through the bearing seat and extends to the left side of the bearing seat, a hydraulic telescopic rod is fixedly connected to the left side of the top of the workbench, a connecting seat is fixedly connected to the top of the connecting seat, a second mounting ring is fixedly connected to the top of the left side of the workbench, and a controller is fixedly connected to the front end of the left side of the top of the workbench;

[0005] The inner cavities of the first mounting ring and the second mounting ring are both provided with mounting holes, the inner cavities of the mounting holes are fixedly connected to threaded tubes via bearings, the bottom of the surface of the threaded tube is fixedly connected to a first bevel gear, the surface of the first bevel gear is meshed with a driving gear ring, the surface of the driving gear ring is fixedly connected to the inner wall of the first mounting ring via a bearing, the inner cavity of the threaded tube is threadedly connected to a first threaded rod, and the bottom of the first threaded rod is fixedly connected to an extrusion plate;

[0006] A mounting groove is provided on one side of the inner cavity of the extrusion plate, and both ends of the inner cavity of the mounting groove are fixedly connected to a second threaded rod through a bearing, both ends of the second threaded rod pass through the outside of the extrusion plate and are threadedly connected to the clamping plate, and the opposite ends of the two second threaded rods are fixedly connected to the second bevel gear, and the tops of the two second bevel gears are meshed with a third bevel gear, and the top of the third bevel gear is fixedly connected to the transmission shaft, and the top of the transmission shaft passes through the top of the extrusion plate, and both ends on the other side of the extrusion plate are fixedly connected to a limiting rod, and the other end of the limiting rod passes through the outside of the clamping plate.

[0007] Preferably, a slide groove is provided on the left side of the top of the workbench, the inner cavity of the slide groove is slidably connected to a slider, and the top of the slider is fixedly connected to the bottom of the support plate.

[0008] Preferably, a sleeve is fixedly connected to the left side of the support plate, and the sleeve and the output end of the hydraulic telescopic rod are fixedly provided with a pin hole, and the inner cavity of the pin hole is provided with a pin rod.

[0009] Preferably, a handle is fixedly connected to the surface of the driving gear ring, and the surface of the handle is provided with anti-slip grooves.

[0010] Preferably, a hand wheel is fixedly connected to the top of the transmission shaft, and rubber pads are fixedly connected to the surfaces of the extrusion plate and the clamping plate.

[0011] Preferably, an anti-slip block is fixedly connected to one end of the second threaded rod located on the outside, and the diameter of the anti-slip block is larger than the outer diameter of the second threaded rod.

[0012] Preferably, the number of the threaded tubes is six and they are distributed at equal distances around the circumference.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model locks the bolt and the nut in the inner cavity of the first mounting ring and the second mounting ring, and at the same time starts the driving motor to drive the gear ring to rotate, so that the gear ring can drive the first mounting ring to rotate. At this time, the first mounting ring can drive the bolt to move toward the inner cavity of the nut, and continue to rotate until the rotation torque reaches the set value. If the bolt does not break, it can be shown that the connection torque of the bolt and the nut is qualified. Then, the hydraulic telescopic rod is extended to insert the inner cavity of the sleeve and the pin rod is inserted. Then, the hydraulic telescopic rod can be retracted, and the hydraulic telescopic rod can drive the support plate to move, and the support plate can drive the bolt to move. When the tensile force reaches the qualified force and the bolt does not separate from the nut, it can be shown that the tensile force of the bolt and nut is qualified.

[0015] 2. The utility model can limit the support plate by setting a slide groove and a slider, so that it can move left and right stably. By setting a handle, it can facilitate the rotation of the driving gear ring. By setting a handwheel, it can facilitate the rotation of the transmission shaft. By setting an anti-slip block, it can prevent the clamping plate from detaching from the second threaded rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the first mounting ring of the present invention;

[0018] Figure 3 This is a schematic diagram of the connection structure between the clamping plate and the extrusion plate of the utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the first mounting ring of the utility model.

[0020] In the figure: 1. Workbench; 2. Support plate; 3. Bearing seat; 4. First mounting ring; 5. Ring gear; 6. Drive gear; 7. Reducer; 8. Drive motor; 9. Hydraulic telescopic rod; 10. Connecting seat; 11. Second mounting ring; 12. Controller; 13. Threaded tube; 14. First bevel gear; 15. Drive ring gear; 16. First threaded rod; 17. Extrusion plate; 18. Second threaded rod; 19. Clamping plate; 20. Second bevel gear; 21. Third bevel gear; 22. Transmission shaft; 23. Limit rod; 24. Slide groove; 25. Anti-slip block. DETAILED DESCRIPTION

[0021] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0022] The components of the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0023] Example 1:

[0024] See also Figures 1-4In order to achieve the purpose of torque and tensile force detection, this embodiment provides the following technical solutions, specifically disclosing: a bolt and nut assembly torsion and tension test device, including a workbench 1, a support plate 2 is slidably connected to the left side of the top of the workbench 1, a bearing seat 3 is fixedly connected to the left side of the top of the support plate 2, a first mounting ring 4 is fixedly connected to the inner cavity of the bearing seat 3, a gear ring 5 is fixedly connected to the surface of the first mounting ring 4, a driving gear 6 is meshed with the bottom of the gear ring 5, a reducer 7 is fixedly connected to the left side of the driving gear 6, a driving motor 8 is fixedly connected to the left side of the reducer 7, the driving motor 8 passes through the bearing seat 3 and extends to the left side of the bearing seat 3, the workbench 1 The left side of the top is fixedly connected with a hydraulic telescopic rod 9, the right side of the top of the workbench 1 is fixedly connected with a connecting seat 10, the top of the connecting seat 10 is fixedly connected with a second mounting ring 11, the front end of the left side of the top of the workbench 1 is fixedly connected with a controller 12, and a slide groove 24 is provided on the left side of the top of the workbench 1, and a slider is slidably connected to the inner cavity of the slide groove 24. The top of the slider is fixedly connected to the bottom of the support plate 2. By setting the slide groove 24 and the slider, the support plate 2 can be limited so that it can move stably left and right. The left side of the support plate 2 is fixedly connected with a sleeve, and the output ends of the sleeve and the hydraulic telescopic rod 9 are fixedly provided with pin holes, and the inner cavity of the pin hole is provided with a pin rod.

[0025] Example 2:

[0026] See also Figures 1-4 In order to achieve the purpose of clamping and fixing, this embodiment provides the following technical solutions, which specifically disclose: the inner cavities of the first mounting ring 4 and the second mounting ring 11 are both provided with mounting holes, and the inner cavity of the mounting hole is fixedly connected to a threaded tube 13 through a bearing, and the bottom of the surface of the threaded tube 13 is fixedly connected to a first bevel gear 14, and the surface of the first bevel gear 14 is meshed with a driving gear ring 15, and the surface of the driving gear ring 15 is fixedly connected to the inner wall of the first mounting ring 4 through a bearing, and the inner cavity of the threaded tube 13 is threadedly connected to a first threaded rod 16, and the bottom of the first threaded rod 16 is fixedly connected to an extrusion plate 17, and the surface of the driving gear ring 15 is fixedly connected to a handle, and the surface of the handle is provided with anti-slip grooves. By providing a handle, the driving gear ring 15 can be easily rotated. There are six threaded tubes 13, and they are distributed equidistantly around the circumference.

[0027] Example 3:

[0028] See also Figures 1-4In order to achieve the purpose of preventing separation, this embodiment provides the following technical solutions, which specifically disclose: a mounting groove is opened on one side of the inner cavity of the extrusion plate 17, and both ends of the inner cavity of the mounting groove are fixedly connected to the second threaded rod 18 through bearings. Both ends of the second threaded rod 18 pass through the outside of the extrusion plate 17 and are threadedly connected to the clamping plate 19. The opposite ends of the two second threaded rods 18 are fixedly connected to the second bevel gear 20, and the tops of the two second bevel gears 20 are meshed with the third bevel gear 21. The top of the third bevel gear 21 is fixedly connected to the transmission shaft 22, and the top of the transmission shaft 22 The first end of the second threaded rod 18 is fixedly connected to the top of the extrusion plate 17, and the two ends of the other side of the extrusion plate 17 are fixedly connected to the limit rod 23. The other end of the limit rod 23 passes through the outside of the clamping plate 19. The top of the transmission shaft 22 is fixedly connected with a handwheel. By setting the handwheel, it is easy to rotate the transmission shaft 22. The surfaces of the extrusion plate 17 and the clamping plate 19 are fixedly connected with rubber pads. The end of the second threaded rod 18 located on the outside is fixedly connected with an anti-slip block 25. The diameter of the anti-slip block 25 is larger than the outer diameter of the second threaded rod 18. By setting the anti-slip block 25, the clamping plate 19 can be prevented from being detached from the second threaded rod 18.

[0029] The control method of the present invention is to automatically control through the controller 12. The control circuit of the controller 12 can be implemented by simple programming by technicians in this field, which is common knowledge in this field. Moreover, the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and circuit connection in detail.

[0030] When in use, the bolt and nut are respectively placed into the inner cavity of the first mounting ring 4 and the second mounting ring 11, and then the handle is turned to drive the driving gear ring 15 to rotate, the driving gear ring 15 drives the first bevel gear 14 to rotate, the first bevel gear 14 drives the threaded tube 13 to rotate, the threaded tube 13 drives the first threaded rod 16 to rotate, and the first threaded rod 16 drives the extrusion plate 17 to move and fit with the surface of the bolt and nut, so that they can be squeezed and fixed, and then the transmission shaft 22 is driven to rotate by turning the hand wheel, the transmission shaft 22 drives the third bevel gear 21 to rotate, the third bevel gear 21 drives the second bevel gear 20 to rotate, the second bevel gear 20 drives the second threaded rod 18 to rotate, and the second threaded rod 18 drives the clamping plate 19 The movement can clamp and limit both sides of the bolt and nut to avoid separation, and then the driving motor 8 is started to drive the ring gear 5 to rotate, and the ring gear 5 can drive the first mounting ring 4 to rotate. At this time, the first mounting ring 4 can drive the bolt to move toward the inner cavity of the nut, and continue to rotate until the rotation torque reaches the set value. The bolt does not break, which indicates that the connection torque of the bolt and nut is qualified. Then, the hydraulic telescopic rod 9 is extended into the inner cavity of the insertion sleeve and the pin rod is inserted. Then, the hydraulic telescopic rod 9 can be retracted, and the hydraulic telescopic rod 9 can drive the support plate 2 to move, and the support plate 2 can drive the bolt to move. When the tensile force reaches the qualified force and the bolt does not separate from the nut, it indicates that the tensile force of the bolt and nut is qualified.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt and nut assembly torsion and tension test device, comprising a workbench (1), characterized in that: The left side of the top of the workbench (1) is slidably connected to a support plate (2), the left side of the top of the support plate (2) is fixedly connected to a bearing seat (3), the inner cavity of the bearing seat (3) is fixedly connected to a first mounting ring (4), the surface of the first mounting ring (4) is fixedly connected to a gear ring (5), the bottom of the gear ring (5) is meshed with a driving gear (6), the left side of the driving gear (6) is fixedly connected to a reducer (7), the left side of the reducer (7) is fixedly connected to a driving motor (8), the driving motor (8) passes through the bearing seat (3) and extends to the left side of the bearing seat (3), the left side of the top of the workbench (1) is fixedly connected to a hydraulic telescopic rod (9), the right side of the top of the workbench (1) is fixedly connected to a connecting seat (10), the top of the connecting seat (10) is fixedly connected to a second mounting ring (11), and the front end of the left side of the top of the workbench (1) is fixedly connected to a controller (12); The inner cavities of the first mounting ring (4) and the second mounting ring (11) are both provided with mounting holes, the inner cavities of the mounting holes are fixedly connected to a threaded tube (13) via a bearing, the bottom of the surface of the threaded tube (13) is fixedly connected to a first bevel gear (14), the surface of the first bevel gear (14) is meshed with a driving gear ring (15), the surface of the driving gear ring (15) is fixedly connected to the inner wall of the first mounting ring (4) via a bearing, the inner cavity of the threaded tube (13) is threadedly connected to a first threaded rod (16), and the bottom of the first threaded rod (16) is fixedly connected to an extrusion plate (17); A mounting groove is provided on one side of the inner cavity of the extrusion plate (17), and both ends of the inner cavity of the mounting groove are fixedly connected to a second threaded rod (18) through a bearing, and both ends of the second threaded rod (18) pass through the outside of the extrusion plate (17) and are threadedly connected to a clamping plate (19), and the opposite ends of the two second threaded rods (18) are fixedly connected to a second bevel gear (20), and the tops of the two second bevel gears (20) are meshed with a third bevel gear (21), and the top of the third bevel gear (21) is fixedly connected to a transmission shaft (22), and the top of the transmission shaft (22) passes through the top of the extrusion plate (17), and both ends of the other side of the extrusion plate (17) are fixedly connected to a limiting rod (23), and the other end of the limiting rod (23) passes through the outside of the clamping plate (19).

2. A bolt and nut assembly torsion and tension testing device according to claim 1, characterized in that: A slide groove (24) is provided on the left side of the top of the workbench (1), and a slider is slidably connected to the inner cavity of the slide groove (24), and the top of the slider is fixedly connected to the bottom of the support plate (2).

3. A bolt and nut assembly torsion and tension testing device according to claim 1, characterized in that: The left side of the support plate (2) is fixedly connected with a sleeve, and the sleeve and the output end of the hydraulic telescopic rod (9) are fixedly provided with a pin hole, and the inner cavity of the pin hole is provided with a pin rod.

4. A bolt and nut assembly torsion and tension testing device according to claim 1, characterized in that: A handle is fixedly connected to the surface of the driving gear ring (15), and the surface of the handle is provided with anti-slip grooves.

5. The bolt and nut assembly torsion and tension testing device according to claim 1, characterized in that: The top of the transmission shaft (22) is fixedly connected with a hand wheel, and the surfaces of the extrusion plate (17) and the clamping plate (19) are fixedly connected with rubber pads.

6. A bolt and nut assembly torsion and tension testing device according to claim 1, characterized in that: An anti-slip block (25) is fixedly connected to one end of the second threaded rod (18) located on the outside, and the diameter of the anti-slip block (25) is larger than the outer diameter of the second threaded rod (18).

7. A bolt and nut assembly torsion and tension testing device according to claim 1, characterized in that: The number of the threaded tubes (13) is six and they are distributed at equal distances around the circumference.

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