High-strength torsion shear bolt

Abstract

The utility model discloses a high -strength torsion shear bolt, include: screw rod, plum blossom head, the plum blossom head sets up at the bottom of screw rod, be equipped with the fracture groove between screw rod and plum blossom head, the top of screw rod is equipped with bolt head, the screw thread connection of screw rod has the nut, anti -unscrewing mechanism, anti -unscrewing mechanism is located bolt head and nut to make anti -unscrewing mechanism follow bolt head. The utility model has the beneficial effect that through anti -unscrewing mechanism increases the friction between screw rod and workpiece, can clean up the dirt such as oil dirt, rust, burr etc. on the workpiece surface simultaneously, makes workpiece surface keep smooth, has improved the clamping force, can avoid bolt loosening, can monitor the strain change of bolt in real time, when the pretightening force drops to the set value, sends early warning signal.

Description

Technical Field

[0001] This utility model relates to the field of torsion shear bolt technology, specifically a high-strength torsion shear bolt. Background Technology

[0002] Utility model application CN202123157734.5 discloses a torsion shear bolt for steel structures. By increasing the groove diameter of the bolt, the nut in the connection pair can pass the tightening axial force test without surface treatment, and the nut can pass the tightening axial force test without phosphating, thus eliminating one process and saving costs.

[0003] After installation, the bolts of the above-mentioned device are prone to loosening due to external vibration and other factors, which affects the bolt tightening effect. The preload value cannot be monitored, and manual inspection and re-tightening are required at regular intervals, which is labor-intensive. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a high-strength torsion shear bolt.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-strength torsion-shear bolt, comprising:

[0007] Screw;

[0008] A sprite head is provided at the bottom of the screw, a fracture groove is provided between the screw and the sprite head, a bolt head is provided at the top of the screw, and a nut is threaded onto the screw;

[0009] An anti-loosening mechanism is provided on the bolt head and nut so that the anti-loosening mechanism moves with the bolt head.

[0010] The anti-loosening mechanism increases the friction between the screw and the workpiece, while also cleaning the workpiece surface of impurities such as oil, rust, and burrs, keeping the workpiece surface flat, improving the clamping force, and preventing the bolt from loosening.

[0011] Furthermore, the anti-loosening mechanism includes an elastic washer, which is sleeved on the screw. One end of the elastic washer is fixedly connected to the bottom of the bolt head. The surface of the elastic washer is provided with anti-slip teeth, and the bottom surface of the elastic washer is provided with raised sharp teeth with the pointed ends of the raised sharp teeth facing downwards.

[0012] Furthermore, the anti-loosening mechanism also includes a micro strain sensor. The bolt head is provided with an open circular groove, and the screw has a fixed cavity. The top of the fixed cavity communicates with the open circular groove. The micro strain sensor is installed in the fixed cavity. The inner wall of the open circular groove is provided with an internal thread. A sealing cap is connected to the internal thread of the open circular groove. A cross groove is provided at the center of the surface of the sealing cap.

[0013] Furthermore, an anti-loosening washer is fitted on the screw, and the anti-loosening washer is in contact with the surface of the nut.

[0014] Anti-loosening washers increase the friction between the nut and the workpiece, thus improving the anti-loosening effect.

[0015] Furthermore, the area between the screw and the bolt head is frustum-shaped and larger than the diameter of the screw.

[0016] The frustum shape between the screw and the bolt head can perfectly match the through hole on the workpiece, resulting in uniform force distribution and improved preload.

[0017] Furthermore, the bolt head is a round bolt head, and the screw, the star head, and the bolt head are integrally formed and made of high-strength alloy steel.

[0018] Compared with existing technologies, this technical solution has the following beneficial effects:

[0019] 1. The elastic washer is fixed to the bolt head, eliminating the need for separate washer assembly during installation, thus improving installation efficiency. The raised teeth on the bottom of the elastic washer rotate to scrape away oil, rust, burrs and other impurities from the workpiece surface, keeping the workpiece surface clean and flat, and improving clamping force. The anti-slip teeth and raised teeth can increase friction and prevent bolts from loosening.

[0020] 2. The strain changes of the bolt can be monitored in real time through a miniature strain sensor, and an early warning signal is issued when the preload drops to the set value. Attached Figure Description

[0021] Figure 1 A magnified view of the anti-loosening mechanism.

[0022] Figure 2 This is a cross-sectional view of the screw and bolt head.

[0023] Figure 3 This is a front view of a torque shear bolt.

[0024] Figure 4 This is an enlarged top view of the sealing cap.

[0025] In the diagram: 1. Screw; 2. Torx head; 3. Fracture groove; 4. Bolt head; 5. Nut; 6. Anti-loosening mechanism; 7. Elastic washer; 8. Anti-slip teeth; 9. Raised sharp teeth; 10. Miniature strain sensor; 11. Open circular groove; 12. Fixing cavity; 13. Anti-loosening washer; 14. Sealing cap; 15. Cross groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] This utility model provides, for example Figure 1-4 The high-strength torsion-shear bolt shown includes:

[0029] Screw 1;

[0030] A sprite head 2 is provided at the bottom of the screw 1. A fracture groove 3 is provided between the screw 1 and the sprite head 2. A bolt head 4 is provided at the top of the screw 1. A nut 5 is threaded onto the screw 1.

[0031] Anti-loosening mechanism 6 is provided on bolt head 4 and nut 5 so that anti-loosening mechanism 6 moves with bolt head 4.

[0032] In use, the screw 1 is passed through the through hole of the workpiece, the bolt head 4 is located on the surface of the workpiece, and the nut 5 is tightened on the screw 1. First, the nut 5 is pre-tightened with a wrench, and then the screw 1 is tightened with an electric torque shear wrench through the spline head 2. When a certain torque is reached, the spline head 2 breaks off from the screw 1 at the fracture groove 3. The anti-loosening mechanism 6 increases the friction between the screw 1 and the workpiece, and at the same time, it can clean the oil, rust, burrs and other impurities on the surface of the workpiece, keep the surface of the workpiece flat, improve the clamping force, and prevent the bolt from loosening.

[0033] Refer to the instruction manual appendix Figure 1 Included with instruction manual Figure 3 The anti-loosening mechanism 6 includes an elastic washer 7, which is sleeved on the screw 1. One end of the elastic washer 7 is fixedly connected to the bottom of the bolt head 4. The surface of the elastic washer 7 is provided with anti-slip teeth 8, and the bottom surface of the elastic washer 7 is provided with raised sharp teeth 9, with the pointed end of the raised sharp teeth 9 facing down.

[0034] One end of the elastic washer 7 is fixedly connected to the bolt head 4. No separate washer needs to be installed during bolt installation, which improves installation efficiency. When the screw 1 rotates, it drives the bolt head 4 and the elastic washer 7 to rotate. The raised teeth 9 on the bottom surface of the elastic washer 7 rotate to scrape off impurities such as oil, rust, and burrs from the surface of the workpiece, keeping the surface of the workpiece clean and flat, and improving clamping force. The anti-slip teeth 8 and the raised teeth 9 can increase friction and prevent the bolt from loosening.

[0035] Refer to the instruction manual appendix Figure 2 Included with instruction manual Figure 4 The anti-loosening mechanism 6 also includes a miniature strain sensor 10. The bolt head 4 is provided with an open circular groove 11. The screw 1 is provided with a fixed cavity 12. The top of the fixed cavity 12 is connected to the open circular groove 11. The miniature strain sensor 10 is installed in the fixed cavity 12. The inner wall of the open circular groove 11 is provided with an internal thread. The internal thread of the open circular groove 11 is connected to a sealing cover 14. The center of the surface of the sealing cover 14 is provided with a cross groove 15.

[0036] When monitoring is required, the operator uses a screwdriver to rotate the sealing cover 14 through the cross groove 15, removes the sealing cover 14 from the open circular groove 11, installs the miniature strain sensor 10 into the fixed cavity 12, and then seals the fixed cavity 12 with the sealing cover 14 to prevent dust and rainwater from entering. The miniature strain sensor 10 is wirelessly connected to an external data acquisition device to monitor the strain changes of the bolt in real time. The strain is proportional to the preload. When the preload drops to the set value, an early warning signal is issued.

[0037] Refer to the instruction manual appendix Figure 3 An anti-loosening washer 13 is fitted on the screw 1, and the anti-loosening washer 13 is in contact with the surface of the nut 5.

[0038] The anti-loosening washer 13 increases the friction between the nut 5 and the workpiece, thereby improving the anti-loosening effect.

[0039] Refer to the instruction manual appendix Figure 2 The area between screw 1 and bolt head 4 is frustum-shaped and larger than the diameter of screw 1.

[0040] The frustum shape between the screw 1 and the bolt head 4 can perfectly match the through hole on the workpiece, resulting in uniform force distribution and improved preload.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-strength torsion-shear bolt, characterized in that, include: Screw (1); A plum blossom head (2) is provided at the bottom of the screw (1). A fracture groove (3) is provided between the screw (1) and the plum blossom head (2). A bolt head (4) is provided at the top of the screw (1). A nut (5) is threaded onto the screw (1). Anti-loosening mechanism (6), the anti-loosening mechanism (6) is provided on the bolt head (4) and the nut (5) so that the anti-loosening mechanism (6) moves with the bolt head (4); The anti-loosening mechanism (6) includes an elastic washer (7), which is sleeved on the screw (1). One end of the elastic washer (7) is fixedly connected to the bottom of the bolt head (4). The surface of the elastic washer (7) is provided with anti-slip teeth (8), and the bottom surface of the elastic washer (7) is provided with protruding sharp teeth (9), with the pointed end of the protruding sharp teeth (9) facing downward.

2. A high-strength torsion-shear bolt according to claim 1, characterized in that, The anti-loosening mechanism (6) also includes a micro strain sensor (10). The bolt head (4) is provided with an open circular groove (11). The screw (1) is provided with a fixed cavity (12). The top of the fixed cavity (12) is connected to the open circular groove (11). The micro strain sensor (10) is installed in the fixed cavity (12). The inner wall of the open circular groove (11) is provided with an internal thread. The open circular groove (11) is connected to a sealing cap (14) by the internal thread. The sealing cap (14) is provided with a cross groove (15) at the center of its surface.

3. A high-strength torsion-shear bolt according to claim 1, characterized in that, An anti-loosening washer (13) is fitted on the screw (1), and the anti-loosening washer (13) is in contact with the surface of the nut (5).

4. A high-strength torsion-shear bolt according to claim 1, characterized in that, The screw (1) and the bolt head (4) are frustum-shaped and larger than the diameter of the screw (1).

5. A high-strength torsion-shear bolt according to claim 1, characterized in that, The bolt head (4) is a round bolt head (4), and the screw (1), the plum blossom head (2) and the bolt head (4) are integrally formed and made of high-strength alloy steel.

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