Bolt for fastening steel net rack

Abstract

The utility model discloses a bolt for fastening a steel net rack, which comprises a bolt head, the inner wall of the bolt head is fixedly connected with a screw rod, the outer wall of the bolt head is movably connected with a pentagonal sleeve, the bolt head comprises a bolt head main body, the bottom of the bolt head main body is fixedly connected with a connecting pipe, and the connecting pipe is fixedly connected with the bolt head main body. An extension pipe is fixedly connected to the bottom of the connecting pipe, a plurality of clamping blocks are fixedly connected to the opposite face of the bolt head body and the extension pipe in an annular array mode, a screw groove is formed in the outer wall of the extension pipe, and by arranging the sleeve body and the clamping blocks, the bolt head is firmly fixed to the end, needing to be connected with a bolt ball, of a steel net frame rod piece; the problems that in the process of connecting the bolt ball and the steel pipe for a long time, the steel pipe slides off, due to the fact that the steel pipe is buckled on the inner side of the bolt head, the steel pipe is loosened after being used for a long time, a steel net frame is loosened, the situation that a steel net frame rod piece possibly falls off is caused, and the safety of a user is possibly caused are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to bolts for fastening steel grids. Background Art

[0002] Bolt: A mechanical part, a cylindrical threaded fastener that is matched with a nut. A type of fastener consisting of a head and a screw (a cylinder with external threads), which must be matched with a nut to fasten two parts with through holes. This type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection;

[0003] According to the patent document: CN201180721Y, a fastener is disclosed. It includes a bolt head and a screw rod, a threaded section is provided at the front end of the screw rod, and a keyway is provided at the root of the screw rod or it is in an external hexagonal shape. The utility model provides a keyway at the root of the screw rod or it is in an external hexagonal shape, changes the mode of using the bolt head as a torque transmission mode, uses the bolt head as an axial limiter, and the keyway or external hexagonal shape at the root of the screw rod plays a role in transmitting rotational torque. It is suitable for application on steel grid bolt ball nodes.

[0004] At present, the bolts used to fasten the steel grid are generally used to connect the steel grid with the bolt ball. Each steel grid rod has only one high-strength bolt connected to the bolt ball node at one end. The bolt ball is mostly used for grid structure. The main structural feature is: a ball has multiple holes with internal threads, which are used to connect multiple steel pipes at one point. It is composed of bolts, steel balls, pins (or screws), sleeves and cone heads or sealing plates. The existing bolts will cause the steel pipe to slip during the long-term connection between the bolt ball and the steel pipe. Since the steel pipe is buckled on the inner side of the bolt head, it will loosen after long-term use, causing the steel grid to loosen, which may cause the steel grid rod to fall off, and may cause safety problems for users. Utility Model Content

[0005] The purpose of the present invention is to provide a bolt for fastening a steel grid frame to solve the problem that the existing bolts proposed in the above-mentioned background technology may cause the steel pipe to slip during the long-term connection between the bolt ball and the steel pipe. Since the steel pipe is buckled on the inner side of the bolt head, it will become loose after a long time of use, causing the steel grid frame to loosen, which may cause the steel grid frame rods to fall off, and may cause safety problems to users.

[0006] To achieve the above object, the utility model provides the following technical solution: a bolt for fastening a steel grid, comprising a bolt head, the inner wall of the bolt head is fixedly connected with a screw rod, and the outer wall of the bolt head is movably connected with a pentagonal sleeve;

[0007] The bolt head includes a bolt head body, the bottom of the bolt head body is fixedly connected to a connecting pipe, the bottom of the connecting pipe is fixedly connected to an extension pipe, a plurality of blocks are fixedly connected in a circular array on opposite sides of the bolt head body and the extension pipe, and a screw groove is provided on the outer wall of the extension pipe.

[0008] Preferably, the screw includes a screw body, an outer wall of the screw body is fixedly connected to a bolt head body and an inner wall of an extension tube, and an outer wall of one end of the screw body extending out of the outer wall of the extension tube is provided with a thread.

[0009] Preferably, the clamping block includes a clamping block bottom plate, and two sides of the clamping block bottom plate are respectively fixedly connected to the opposite surfaces of the bolt head body and the extension tube.

[0010] Preferably, a rotating block is fixedly connected to one side of the block base plate, the inner wall of the rotating block is rotatably connected to a limiting block, the limiting block extends out of the outer wall opposite to the bolt head body and the extension tube, a spring is fixedly connected to the side of the limiting block away from the rotating block, and the end of the spring away from the limiting block is fixedly connected to the block base plate.

[0011] Preferably, the pentagonal sleeve includes a sleeve body, the inner wall of the sleeve body is movably connected to the outer wall of the extension tube, the outer wall of the sleeve body is threadedly connected with a sleeve bolt, and one end of the sleeve bolt close to the sleeve body extends to the inner wall of the sleeve body and is threadedly connected to the inner wall of the screw groove.

[0012] Preferably, a plurality of welding block grooves are provided in a circular array on one side of the outer wall of the sleeve body, the inner walls of several of the welding block grooves are rotatably connected with welding blocks, two welding block limiting grooves are provided on one side of the inner walls of several of the welding block grooves, and the inner walls of several of the welding block grooves are fixedly connected with welding block rotating rods.

[0013] Preferably, the welding block includes a welding block body, the inner wall of the welding block body is rotatably connected to the outer wall of the welding block rotating rod, and two welding block clamping grooves are provided on the side of several welding block bodies away from the sleeve body, and the inner walls of the two welding block clamping grooves are slidably connected with welding block clamps, and the sides of the two welding block clamps away from the welding block body extend to the outer wall of the welding block body and are semicircular cross-sections, and the sides of the two welding block clamps close to the welding block body are fixedly connected with a second spring, and the ends of the two second springs away from the welding block clamps are fixedly connected to the side of the inner wall of the welding block clamping groove away from the welding block clamps.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By providing a sleeve body and a clamping block, the bolt head is firmly fixed to the end of the steel grid rod that needs to be connected to the bolt ball, and then connected to the bolt ball through a screw rod, which solves the problem of the steel pipe slipping during the long-term connection between the bolt ball and the steel pipe. Since the steel pipe is buckled on the inner side of the bolt head, it will loosen after long-term use, causing the steel grid to loosen, which may cause the steel grid rod to fall off, and may cause safety problems for users;

[0016] 2. By providing a welding block body and a sleeve body, the welding block body is rotated out of the inner wall of the welding block groove opened on the outer wall of the sleeve body, and welding is performed between the welding block body and the outer wall of the bolt ball. When the welding block body is not needed, the welding block body is stuck in the inner wall of the welding block groove, which does not affect the outer wall shape of the sleeve body and avoids affecting the operation of the sleeve body by the workers. This solves the problem that after the connection between the spiral ball and the steel grid rod is completed, in order to avoid the problem of thread slippage and loosening, it is generally necessary to weld the steel grid rod and the bolt ball firmly together again. However, the area that can be welded after the connection is too small, which may lead to the problem of insufficient welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the bolt head of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the screw of the utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the card block of the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the pentagonal sleeve and the welding block of the utility model;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the pentagonal sleeve of the utility model;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the welding block of the utility model.

[0024] In the figure: 1. bolt head; 11. bolt head body; 12. connecting pipe; 13. extension pipe; 14. clamping block; 141. clamping block bottom plate; 142. rotating block; 143. limiting block; 144. spring; 15. screw groove; 2. screw rod; 21. screw rod body; 22. thread; 3. pentagonal sleeve; 31. sleeve body; 32. sleeve bolt; 33. welding block groove; 34. welding block; 341. welding block body; 342. welding block clamping block slide groove; 343. second spring; 344. welding block clamping block; 35. welding block limiting groove; 36. welding block rotating rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The utility model provides a technical solution: a bolt for fastening a steel grid frame, comprising a bolt head 1, the inner wall of the bolt head 1 is fixedly connected with a screw rod 2, and the outer wall of the bolt head 1 is movably connected with a pentagonal sleeve 3. When it is necessary to connect the steel grid frame rod frame and the bolt ball node, first, the end of the bolt head 1 away from the screw rod 2 is put into the inner wall of the steel grid frame rod, and the inner wall of the steel grid frame rod is limited by the outer wall of the bolt head 1, and one end of the bolt head 1 extends out of the outer wall of the steel grid frame rod. Then, the pentagonal sleeve 3 is sleeved to the outer wall of the bolt head 1 extending out of the steel grid frame rod and fixed, so that the bolt head 1 forms a clamping effect with the pentagonal sleeve 3 at one end of the inner wall of the steel grid frame rod, and the bolt head 1 is tightly fixed to the bolt connection port of the steel grid frame rod. Then, the bolt ball node is connected through the screw rod 2. Then, the outer wall of the pentagonal sleeve 3 is turned out of the inner wall of the pentagonal sleeve 3 and welded to the outer wall of the bolt ball to make its connection more stable.

[0027] See also Figure 2 , Figure 3 , Figure 4 and Figure 5The bolt head 1 includes a bolt head body 11, a connecting tube 12 is fixedly connected to the bottom of the bolt head body 11, an extension tube 13 is fixedly connected to the bottom of the connecting tube 12, a plurality of blocks 14 are fixedly connected to the opposite sides of the bolt head body 11 and the extension tube 13 in a circular array, a screw groove 15 is provided on the outer wall of the extension tube 13, the screw rod 2 includes a screw rod body 21, an outer wall of the screw rod body 21 is fixedly connected to the inner wall of the bolt head body 11 and the extension tube 13, a thread 22 is provided on the outer wall of the end of the screw rod body 21 extending out of the outer wall of the extension tube 13, the block 14 includes a block bottom plate 141, and the block bottom plate 141 The two sides are respectively fixedly connected to the opposite sides of the bolt head body 11 and the extension tube 13, one side of the block bottom plate 141 is fixedly connected with a rotating block 142, the inner wall of the rotating block 142 is rotatably connected to the limiting block 143, the limiting block 143 extends out of the outer wall of the opposite side of the bolt head body 11 and the extension tube 13, the side of the limiting block 143 away from the rotating block 142 is fixedly connected with a spring 144, and the end of the spring 144 away from the limiting block 143 is fixedly connected with the block bottom plate 141, the pentagonal sleeve 3 includes a sleeve body 31, the inner wall of the sleeve body 31 is movably connected to the outer wall of the extension tube 13, and the outer wall of the sleeve body 31 is movably connected to the outer wall of the extension tube 13. The wall is threadedly connected with a sleeve bolt 32, and one end of the sleeve bolt 32 close to the sleeve body 31 extends to the inner wall of the sleeve body 31 and is threadedly connected to the inner wall of the screw groove 15. When the steel grid rod needs to be connected with the bolt ball, the bolt head body 11 is first inserted into the inner wall of the steel grid rod. When the bolt head body 11 is inserted into the inner wall of the steel grid rod, a plurality of limit blocks 143 are pushed by the inner wall of the steel grid rod, rotate toward the inner wall of the block bottom plate 141 and press the spring 144. When the bolt head body 11 is fully inserted into the inner wall of the steel grid rod, the spring 144 resets the limit block 143 and simultaneously pulls it to one side. The extension tube 13 is moved so that the limit block 143 is tightly clamped on the convex surface of the inner wall of the steel grid rod, and the limit block 143 cannot be rotated to the side away from the spring 144 due to the limitation of the rotating block 142, so that a plurality of clamping blocks 14 clamp the inner wall of the steel grid rod and cannot pull out the bolt head body 11, and then the sleeve body 31 is sleeved onto the outer wall of the extension tube 13 on the outer wall of the steel grid rod, and the sleeve bolt 32 is rotated into the inner wall of the screw groove 15, so that the bolt head 1 is firmly fixed to the end of the steel grid rod that needs to be connected to the bolt ball through the cooperation of the sleeve body 31 and the clamping block 14, and then connected to the bolt ball through the screw rod 2.

[0028] See also Figure 6 , Figure 7A plurality of welding block grooves 33 are provided in a circular array on one side of the outer wall of the sleeve body 31, and the inner walls of the plurality of welding block grooves 33 are rotatably connected with welding blocks 34. Two welding block limiting grooves 35 are provided on one side of the inner walls of the plurality of welding block grooves 33, and the inner walls of the plurality of welding block grooves 33 are fixedly connected with welding block rotating rods 36. The welding block 34 includes a welding block body 341, and the inner wall of the welding block body 341 is rotatably connected to the outer wall of the welding block rotating rod 36. Two welding block card block slide grooves 342 are provided on the side of the plurality of welding block bodies 341 away from the sleeve body 31, and the inner walls of the two welding block card block slide grooves 342 are slidably connected with welding block card blocks 344. The two welding block card blocks 344 extend from the side of the welding block body 341 to the outer wall of the welding block body 341 and are semicircular cross-sections. The two welding block card blocks 344 are fixedly connected with a second elastic member on one side close to the welding block body 341. The spring 343 and the two second springs 343 have one end away from the welding block block 344 and are fixedly connected to the inner wall of the welding block block slide groove 342 away from the side of the welding block block 344. When the spiral ball is connected to the steel truss rod, in order to avoid the situation of thread slippage and loosening, it is generally necessary to weld the steel truss rod and the bolt ball together firmly. However, the area that can be welded after the connection is too small, which may lead to insufficient welding effect. Therefore, the welding block main body 341 is rotated out of the inner wall of the welding block groove 33 opened on the outer wall of the sleeve main body 31, and the welding block main body 341 is welded to the outer wall of the bolt ball. When the welding block main body 341 is not needed, the welding block main body 341 is stuck on the inner wall of the welding block limiting groove 35 opened in the welding block groove 33 through the welding block block 344, which does not affect the outer wall shape of the sleeve main body 31, and avoids affecting the operation and use of the sleeve main body 31 by the workers.

[0029] Working principle: When the device is used, when the steel grid rod needs to be connected with the bolt ball, first insert the bolt head body 11 into the inner wall of the steel grid rod. When the bolt head body 11 is inserted into the inner wall of the steel grid rod, a number of limit blocks 143 are pushed by the inner wall of the steel grid rod, rotate toward the inner wall of the block bottom plate 141 and press the spring 144. When the bolt head body 11 is completely inserted into the inner wall of the steel grid rod, the spring 144 resets the limit block 143 and simultaneously pulls the extension tube 13 to one side, so that the limit block 143 is tightly clamped on the steel grid. The convex surface of the inner wall of the rod, and the limit block 143 cannot be rotated to the side away from the spring 144 due to the limit of the rotating block 142, so that the plurality of clamping blocks 14 clamp the inner wall of the steel grid rod and cannot pull out the bolt head body 11, and then the sleeve body 31 is sleeved to the outer wall of the extension tube 13 on the outer wall of the steel grid rod, and the sleeve bolt 32 is rotated into the inner wall of the screw groove 15, so that the bolt head 1 is firmly fixed to the end of the steel grid rod that needs to be connected to the bolt ball through the cooperation of the sleeve body 31 and the clamping block 14, and then connected to the bolt ball through the screw rod 2;

[0030] When the spiral ball is connected to the steel truss rod, in order to avoid the situation of thread slippage and loosening, it is generally necessary to weld the steel truss rod and the bolt ball together firmly. However, the area that can be welded after the connection is too small, which may lead to insufficient welding effect. Therefore, the welding block body 341 is rotated out of the inner wall of the welding block groove 33 opened on the outer wall of the sleeve body 31, and the welding block body 341 is welded to the outer wall of the bolt ball. When the welding block body 341 is not needed, the welding block body 341 is clamped on the inner wall of the welding block limiting groove 35 opened in the welding block groove 33 through the welding block clamping block 344, which does not affect the outer wall shape of the sleeve body 31, thereby avoiding affecting the operation and use of the sleeve body 31 by the workers.

[0031] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0032] 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 bolt for fastening a steel grid, comprising a bolt head (1), characterized in that: The inner wall of the bolt head (1) is fixedly connected to a screw rod (2), and the outer wall of the bolt head (1) is movably connected to a pentagonal sleeve (3); The bolt head (1) comprises a bolt head body (11), the bottom of the bolt head body (11) is fixedly connected to a connecting pipe (12), the bottom of the connecting pipe (12) is fixedly connected to an extension pipe (13), a plurality of clamping blocks (14) are fixedly connected in an annular array on opposite sides of the bolt head body (11) and the extension pipe (13), and a screw groove (15) is provided on the outer wall of the extension pipe (13).

2. The steel grid fastening bolt according to claim 1, characterized in that: The screw rod (2) comprises a screw rod body (21), the outer wall of the screw rod body (21) being fixedly connected to the bolt head body (11) and the inner wall of the extension tube (13), and a thread (22) is formed on the outer wall of one end of the screw rod body (21) extending out of the outer wall of the extension tube (13).

3. The steel grid fastening bolt according to claim 1, characterized in that: The clamping block (14) comprises a clamping block bottom plate (141), and two sides of the clamping block bottom plate (141) are respectively fixedly connected to opposite surfaces of the bolt head body (11) and the extension tube (13).

4. The steel grid fastening bolt according to claim 3, characterized in that: A rotating block (142) is fixedly connected to one side of the block base plate (141); the inner wall of the rotating block (142) is rotatably connected to a limiting block (143); the limiting block (143) extends out of the outer wall of the bolt head body (11) and the opposite surface of the extension tube (13); a spring (144) is fixedly connected to the side of the limiting block (143) away from the rotating block (142); and one end of the spring (144) away from the limiting block (143) is fixedly connected to the block base plate (141).

5. The steel grid fastening bolt according to claim 1, characterized in that: The pentagonal sleeve (3) comprises a sleeve body (31), the inner wall of the sleeve body (31) is movably connected to the outer wall of the extension tube (13), the outer wall of the sleeve body (31) is threadedly connected to a sleeve bolt (32), and one end of the sleeve bolt (32) close to the sleeve body (31) extends to the inner wall of the sleeve body (31) and is threadedly connected to the inner wall of the screw groove (15).

6. The steel grid fastening bolt according to claim 5, characterized in that: A plurality of welding block grooves (33) are provided in a circular array on one side of the outer wall of the sleeve body (31); the inner walls of a plurality of the welding block grooves (33) are rotatably connected to welding blocks (34); two welding block limiting grooves (35) are provided on one side of the inner walls of a plurality of the welding block grooves (33); and the inner walls of a plurality of the welding block grooves (33) are fixedly connected to welding block rotating rods (36).

7. The steel grid fastening bolt according to claim 6, characterized in that: The welding block (34) comprises a welding block body (341), the inner wall of which is rotatably connected to the outer wall of the welding block rotating rod (36), and two welding block clamping grooves (342) are provided on the side of a plurality of the welding block bodies (341) away from the sleeve body (31), and the inner walls of the two welding block clamping grooves (342) are slidably connected to welding block clamping blocks (344), and the sides of the two welding block clamping blocks (344) away from the welding block body (341) extend to the outer wall of the welding block body (341) and are semicircular cross-sections, and the sides of the two welding block clamping blocks (344) close to the welding block body (341) are fixedly connected to second springs (343), and the ends of the two second springs (343) away from the welding block clamping blocks (344) are fixedly connected to the side of the inner wall of the welding block clamping groove (342) away from the welding block clamping blocks (344).

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