Lock catch oppositely-combined type expansion bolt

Abstract

The utility model relates to the technical field of expansion bolts, in particular to a lock catch oppositely-combined type expansion bolt which comprises a bolt body, the bolt body is of a cylindrical structure, external threads are arranged on the surface of the bolt body, a bolt head is arranged at one end of the bolt body, the bolt head and the bolt body are of an integrated structure, and the bolt head is of a hexagonal structure. A nut is arranged on the surface of the bolt body, and the nut is in threaded butt joint with the external thread; an end cover is arranged at one end of the bolt body, and the inner side of the end cover is slidably connected with the end of the bolt body in a sleeved mode. According to the expansion bolt, the bolt body and the bolt head are matched to form a bolt body structure, the bolt body structure can be installed with the expansion sleeve filled in the bolt body structure in an expansion mode when the expansion bolt is installed with two adjacent objects needing to be fastened in a penetrating mode through the external threads on the bolt body structure, the fastening effect of the expansion bolt is achieved, and then in order to further guarantee the fastening effect of installation, the expansion bolt is convenient to install. And the nuts are butted with the external threads, so that the two ends can be stably butted.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion bolts, in particular to a locking buckle type expansion bolt. Background Art

[0002] Fastening bolts are typically made of high-strength materials such as carbon steel, alloy steel, and stainless steel, capable of withstanding significant tensile and shear forces. They provide a reliable connection, ensuring the stability and safety of structures or equipment.

[0003] The fastening bolts can be quickly installed with simple tools (such as wrenches and screwdrivers), saving time and manpower. When maintenance or component replacement is required, the fastening bolts can be easily removed, facilitating subsequent operations.

[0004] Authorization publication number CN204458744U describes a fastening bolt comprising a bolt head and a screw rod, each of which is provided with a threaded hole. The threaded hole has a thread direction opposite to that of the screw rod. The screw rod comprises a first half and a second half of the screw rod, which are separately arranged. A movable rod is threadedly connected to the threaded hole. The movable rod has a truncated cone-shaped tightening block at one end opposite to the bolt head. This utility model has the following advantages and effects: the movable rod disposed within the screw rod expands the screw rod diameter, more effectively preventing the bolt from loosening, while also facilitating operation.

[0005] At present, when conventional bolts are used, in order to ensure that they have a good fastening effect after penetrating two combined objects, it is necessary to first install an expansion sleeve in the hole of the combined object, and then add a nut structure at the end of the bolt for matching and locking. However, after long-term use, if the combined object penetrated by the bolt is subject to vibration and thermal expansion and contraction, it is easy to cause the nut and bolt to loosen, affecting the fixed installation of the structure. Utility Model Content

[0006] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose a locking and engaging expansion bolt.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A locking expansion bolt is designed, comprising a bolt body, the bolt body being a cylindrical structure with an external thread on its surface, a bolt head being provided at one end of the bolt body, the bolt head and the bolt body being an integral structure, the bolt head being a hexagonal structure, a nut being provided on the surface of the bolt body, the nut and the external thread being threadably connected to each other;

[0009] An end cover is provided at one end of the bolt body, and the inner side of the end cover is slidably sleeved with the end of the bolt body. A connecting plate is fixedly installed on the outer ring wall of the end cover, and a threaded rod is fixed on one side of the connecting plate. The surface of the threaded rod is threadedly connected with a threaded barrel, and an extrusion block is fixed at the other end of the threaded barrel, and one side of the extrusion block is tightly set with the end face of the nut.

[0010] In detail, a groove is provided inside the bolt body, and a locking pin is provided inside the groove. The locking pin and the groove are slidably connected to each other. The end face of the locking pin is an arc surface structure. The locking pin can be directly operated by hand pressure, which facilitates the quick assembly of the end cover and the bolt body.

[0011] In detail, a spring is provided inside the groove, and both ends of the spring are fixedly assembled with the surface of the lock pin and the inner wall surface of the groove respectively. The spring is in a balanced state, which can ensure the stable extension and resetting of the lock pin.

[0012] In detail, the surface of the end cover is provided with a through hole running through the interior thereof, and the locking pin is slidably arranged to pass through the through hole. By docking the locking pin with the through hole, a locking structure can be formed between the end cover and the end of the bolt body to achieve stable clamping.

[0013] In detail, the end face of the extrusion block is a circular structure and is made of a hard rubber material, which can play a transitional role when the threaded barrel is pressed against the nut.

[0014] In detail, the portion where the bolt body and the end cover are sleeved is a smooth structure, and the smooth outer diameter of the end of the bolt body is smaller than the spiral outer diameter of the external thread, which can ensure normal docking between the nut and the external thread.

[0015] In detail, the end cover, the connecting plate, the threaded rod and the threaded barrel are all made of aluminum alloy material, which has sufficient structural strength and good corrosion resistance.

[0016] The design scheme proposed by the utility model has the following beneficial effects during application:

[0017] 1. The bolt body and the bolt head cooperate to form a bolt body structure. Through the external thread on it, when it is installed through two adjacent objects that need to be fastened, it can be expanded with the expansion sleeve filled inside to achieve the fastening effect of the expansion bolt. Then, in order to further ensure the fastening effect of the installation, the nut and the external thread are connected to achieve stable alignment at both ends.

[0018] 2. When it is necessary to further improve the installation stability of the nut and the bolt, the end cover and the end of the bolt body are adjusted and the position is adjusted so that the position of the locking pin can correspond to the position of the through hole. The spring reset effect allows the locking pin to pass through the through hole for setting, which can achieve the fixation of the end cover and the end of the bolt body. Then, by rotating the threaded barrel, the threaded barrel and the threaded rod can move relative to each other, thereby driving the extrusion block to contact the end face of the nut, which can achieve the effect of auxiliary tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the lock pin position of the present utility model;

[0021] Figure 3 This is a schematic diagram of the front structure of the utility model;

[0022] Figure 4 This is an enlarged schematic diagram of point A of the present invention.

[0023] In the figure: 1. Bolt body; 11. External thread; 12. Bolt head; 13. Nut; 14. End cover; 15. Connecting plate; 16. Threaded rod; 17. Threaded barrel; 18. Extrusion block; 2. Groove; 21. Lock pin; 22. Spring; 23. Through hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Reference Figures 1-4 A locking expansion bolt includes a bolt body 1, which is a cylindrical structure. An external thread 11 is provided on the surface of the bolt body 1. A bolt head 12 is provided at one end of the bolt body 1. The bolt head 12 and the bolt body 1 are an integral structure. The bolt head 12 is a hexagonal structure. A nut 13 is provided on the surface of the bolt body 1. The nut 13 and the external thread 11 are threadedly connected to each other.

[0026] An end cover 14 is provided at one end of the bolt body 1, and the inner side of the end cover 14 is slidably sleeved with the end of the bolt body 1. A connecting plate 15 is fixed to the outer wall of the end cover 14, and a threaded rod 16 is fixed to one side of the connecting plate 15. The surface of the threaded rod 16 is threadedly connected with a threaded barrel 17, and the other end of the threaded barrel 17 is fixed with an extrusion block 18. One side of the extrusion block 18 is tightly attached to the end face of the nut 13. By rotating the threaded barrel 17, the threaded barrel 17 can be threadedly moved with the threaded rod 16, thereby driving the extrusion block 18 to contact the end face of the nut 13, thereby achieving the effect of supporting and auxiliary tightening.

[0027] It should be further explained that a groove 2 is provided inside the bolt body 1, and a locking pin 21 is provided inside the groove 2. The locking pin 21 and the groove 2 are slidably connected to each other. The end face of the locking pin 21 is an arc structure. The locking pin 21 can be directly operated by hand pressure, which facilitates the quick assembly of the end cover 14 and the bolt body 1.

[0028] It should be further explained that a spring 22 is provided inside the groove 2, and the two ends of the spring 22 are fixedly assembled with the surface of the lock pin 21 and the inner wall surface of the groove 2 respectively. The spring 22 is in a balanced state, which can ensure the stable extension and reset of the lock pin 21.

[0029] It should be further explained that a through hole 23 is provided on the surface of the end cover 14 and passes through the interior thereof, and the locking pin 21 and the through hole 23 are slidably arranged to pass through the end cover 14 and the end of the bolt body 1 through the docking of the locking pin 21 and the through hole 23, so that a locking structure can be formed between the end cover 14 and the end of the bolt body 1 to achieve stable clamping.

[0030] It should be further explained that the end face of the extrusion block 18 is a circular structure and is made of a hard rubber material, which can play a transitional role when the threaded barrel 17 is pressed against the nut 13.

[0031] It should be further explained that the portion where the bolt body 1 and the end cover 14 are sleeved is a smooth structure, and the smooth outer diameter of the end of the bolt body 1 is smaller than the spiral outer diameter of the external thread 11, which can ensure the normal docking of the nut 13 and the external thread 11.

[0032] It should be further explained that the end cover 14 , the connecting plate 15 , the threaded rod 16 and the threaded barrel 17 are all made of aluminum alloy material, which has sufficient structural strength and good corrosion resistance.

[0033] Working method: When the bolt needs to be used, the bolt body 1 and the bolt head 12 cooperate to form a bolt body structure. Through the external thread 11 on it, when it is installed through two adjacent objects that need to be fastened, it can be expanded and installed with the expansion sleeve filled inside to achieve the fastening effect of the expansion bolt. Then, in order to further ensure the fastening effect of the installation, the nut 13 is connected to the external thread 11 to achieve stable engagement at both ends.

[0034] When it is necessary to further improve the installation stability of the nut 13 and the bolt, the end cover 14 and the end of the bolt body 1 are adjusted and the position is adjusted so that the position of the locking pin 21 can correspond to the position of the through hole 23. The resetting effect of the spring 22 allows the locking pin 21 to pass through the through hole 23, thereby fixing the end cover 14 and the end of the bolt body 1. Then, by rotating the threaded barrel 17, the threaded barrel 17 can be threadedly moved with the threaded rod 16, thereby driving the extrusion block 18 to contact the end face of the nut 13, thereby achieving the effect of auxiliary tightening.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A locking expansion bolt, comprising a bolt body (1), characterized in that: The bolt body (1) is a cylindrical structure, and an external thread (11) is provided on the surface of the bolt body (1). A bolt head (12) is provided at one end of the bolt body (1), and the bolt head (12) and the bolt body (1) are an integrated structure. The bolt head (12) is a hexagonal structure. A nut (13) is provided on the surface of the bolt body (1), and the nut (13) and the external thread (11) are threadedly connected to each other. An end cover (14) is provided at one end of the bolt body (1), and the inner side of the end cover (14) is slidably sleeved with the end of the bolt body (1). A connecting plate (15) is fixed on the outer ring wall of the end cover (14), and a threaded rod (16) is fixed on one side of the connecting plate (15). The surface of the threaded rod (16) is threadedly connected to a threaded barrel (17), and an extrusion block (18) is fixed on the other end of the threaded barrel (17), and one side of the extrusion block (18) is tightly attached to the end face of the nut (13).

2. The locking type expansion bolt according to claim 1, characterized in that: A groove (2) is provided inside the bolt body (1), a locking pin (21) is provided inside the groove (2), the locking pin (21) and the groove (2) are slidably sleeved with each other, and the end surface of the locking pin (21) is an arc surface structure.

3. The locking expansion bolt according to claim 2, characterized in that: A spring (22) is provided inside the groove (2), and two ends of the spring (22) are fixedly assembled with the surface of the lock pin (21) and the inner wall surface of the groove (2), respectively.

4. The locking expansion bolt according to claim 3, characterized in that: A through hole (23) is provided on the surface of the end cover (14) and passes through the interior thereof, and the locking pin (21) is slidably arranged to pass through the through hole (23).

5. The locking type expansion bolt according to claim 1, characterized in that: The end surface of the extrusion block (18) is a circular structure and is made of hard rubber material.

6. The locking type expansion bolt according to claim 1, characterized in that: The portion where the bolt body (1) and the end cover (14) are sleeved is a smooth structure.

7. The locking type expansion bolt according to claim 1, characterized in that: The end cover (14), the connecting plate (15), the threaded rod (16) and the threaded barrel (17) are all made of aluminum alloy material.

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