Anti-thread-slipping bolt with double bolt heads

Abstract

The utility model relates to the technical field of double-bolt-head bolts, and provides an anti-thread-slipping double-bolt-head bolt which comprises a main bolt and an auxiliary bolt, the auxiliary bolt is fixed to the upper end of the main bolt, a reinforcing and supporting assembly is arranged outside the auxiliary bolt, an inner supporting assembly is arranged inside the main bolt and the auxiliary bolt, and an inner thread block is connected to the outer portion of the auxiliary bolt in a screwed mode. A plurality of movable holes are formed in the surface of the internal thread block, and stand columns are connected into the movable holes in a sleeved mode. According to the technical scheme, the problems that in actual work in the related technology, friction force is reduced due to vibration and change of an external load, positive pressure in a thread pair disappears at a certain moment, the friction force is zero, threaded connection is loosened, and the threaded connection slips and loses efficacy due to repeated action are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-bolt-head bolts, and specifically, to a double-bolt-head bolt with anti-sliding threads. Background Art

[0002] A double-headed bolt, also called a double-headed screw or double-headed stud, is used for the fixed connection function of machinery. Both ends of the double-headed bolt have threads, and the middle screw rod can be thick or thin. It is generally used in mining machinery, bridges, automobiles, motorcycles, boiler steel structures, tower cranes, long-span steel structures, and large buildings, etc.

[0003] In actual work, the external load has vibrations and changes, which will cause the friction force to decrease. The normal pressure in the thread pair disappears instantaneously at a certain moment, and the friction force becomes zero, thus causing the thread connection to become loose. If it is repeatedly affected, the thread connection will slip and become loose and ineffective.

[0004] Therefore, it is necessary to provide a double-bolt-head bolt with anti-sliding threads. Summary of the Utility Model

[0005] The utility model provides a double-bolt-head bolt with anti-sliding threads, which solves the problem that in actual work in related technologies, the external load has vibrations and changes, which will cause the friction force to decrease. The normal pressure in the thread pair disappears instantaneously at a certain moment, and the friction force becomes zero, thus causing the thread connection to become loose. If it is repeatedly affected, the thread connection will slip and become loose and ineffective.

[0006] The technical solution of the utility model is as follows: It includes

[0007] A main bolt and a sub-bolt, and the sub-bolt is fixed at the upper end of the main bolt;

[0008] A reinforcement support assembly, and the reinforcement support assembly is arranged outside the sub-bolt;

[0009] An inner support assembly, and the inner support assembly is arranged inside the main bolt and the sub-bolt;

[0010] The reinforcement support assembly includes an internal thread block, and the internal thread block is screwed and connected outside the sub-bolt. A number of movable holes are formed on the surface of the internal thread block, and columns are sleeved and connected in the movable holes.

[0011] As a further technical solution, a reinforcement layer is arranged at the lower end of the column, a limiting layer is arranged on the surface of the column, a pressure spring is sleeved outside the column, and a connecting plate is fixed between the columns.

[0012] As a further technical solution, a pressing screw is screwed and connected inside a pair of the connecting plates. The internal thread block is of a hexagonal structure, and the number of columns matches the number of side surfaces of the internal thread block.

[0013] As a further technical solution, the inner support assembly includes a central hole which is opened inside the main bolt and the sub-bolt. A groove is formed at the bottom of the main bolt, and the groove communicates with the central hole.

[0014] As a further technical solution, an inner support rod is movably sleeved and connected in the central hole. A convex block is arranged at the lower end of the inner support rod, and an inner support spring is sleeved and connected outside the inner support rod. The inner support spring is located in the groove.

[0015] As a further technical solution, an annular convex layer is arranged on the surface of the internal thread block, and a cap is inserted and connected in the annular convex layer.

[0016] As a further technical solution, the cap is made of a rubber material structure, and the cap is in a sealed and fitted connection with the annular convex layer.

[0017] As a further technical solution, the bottom surface of the reinforcement layer is a matte anti-slip structural surface.

[0018] The working principle and beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, a reinforcement support assembly is provided. Through the interaction of structures such as the internal thread block, the movable hole, the column, the reinforcement layer, the limiting layer, the pressure spring, the connecting plate, and the pressing screw, the thread directions of the sub-bolt and the main bolt at the top are opposite. When the internal thread block is screwed downwards, it can be firmly supported on the surface of the workpiece through the pressure spring and the limiting layer with an anti-slip surface, achieving the effects of anti-slip and anti-loosening.

[0020] 2. In the present utility model, an inner support assembly is provided. Through the interaction of structures such as the central hole, the groove, the inner support rod, the convex block, and the inner support spring, it can be supported in the convex block and the groove through the inner support spring at the bottom, and the support spring can be compressed to the state of the maximum pressure. When the main bolt is unscrewed, an outward support force can be generated, making it smoother during thread stripping and avoiding the situation of wire jamming. Description of the Drawings

[0021] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is an axonometric drawing of the present utility model;

[0024] Figure 3 is an axonometric sectional view of the present utility model;

[0025] Figure 4 is an attachment of the present utility modelFigure 3 Partial enlarged view of part A

[0026] In the figure: 1, main bolt; 2, sub-bolt; 3, reinforcement support assembly; 3-1, internal thread block; 3-2, movable hole; 3-3, column; 3-4, reinforcement layer; 3-5, limiting layer; 3-6, pressure spring; 3-7, connecting plate; 3-8, pressing screw; 4, internal support assembly; 4-1, central hole; 4-2, groove; 4-3, internal support rod; 4-4, convex block; 4-5, internal support spring; 5, annular convex layer; 6, cap. Specific implementation mode

[0027] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0028] As Figures 1 to 4 shown, this embodiment proposes an anti-slip wire double bolt head bolt, including

[0029] main bolt 1 and sub-bolt 2, and the sub-bolt 2 is fixed to the upper end of the main bolt 1;

[0030] reinforcement support assembly 3, and the reinforcement support assembly 3 is arranged outside the sub-bolt 2;

[0031] internal support assembly 4, and the internal support assembly 4 is arranged inside the main bolt 1 and the sub-bolt 2;

[0032] The reinforcement support assembly 3 includes an internal thread block 3-1, the internal thread block 3-1 is screwed and connected to the outside of the sub-bolt 2, several movable holes 3-2 are opened on the surface of the internal thread block 3-1, a column 3-3 is sleeved and connected in the movable hole 3-2, a reinforcement layer 3-4 is arranged at the lower end of the column 3-3, a limiting layer 3-5 is arranged on the surface of the column 3-3, a pressure spring 3-6 is sleeved outside the column 3-3, a connecting plate 3-7 is fixed between the columns 3-3, and a pair of connecting plates 3-7 are screwed and connected with a pressing screw 3-8 through threads. The internal thread block 3-1 is a hexagonal structure, and the number of columns 3-3 matches the number of side surfaces of the internal thread block 3-1.

[0033] In this embodiment, in order to achieve the effect of reinforcing and preventing thread slipping by relying on double bolts, a reinforcing support assembly 3 is designed. An internally threaded block 3-1 with a hexagonal structure is screwed onto the secondary bolt 2 through threads. A plurality of movable holes 3-2 are formed on the surface of the internally threaded block 3-1. A vertically movable column 3-3 is sleeved in the movable holes 3-2. A limiting layer 3-5 is arranged on the surface of the column 3-3, and a compression spring 3-6 is also sleeved. The compression spring 3-6 is located between the bottom surface of the internally threaded block 3-1 and the limiting layer 3-5. When the internally threaded block 3-1 moves downward, it can be supported on the surface of the workpiece through the column 3-3, and the compression spring 3-6 will be compressed, enabling the column 3-3 to support on the surface of the workpiece in a state with a certain pressure. And a limiting layer 3-5 is arranged at the bottom of the column 3-3 to increase the anti-slip effect with the surface of the workpiece. Combined with the reverse threads of the secondary bolt 2, a good anti-thread-slipping effect can be formed. And a connecting plate 3-7 is fixed between the columns 3-3. A pressing screw 3-8 is screwed and connected in two opposite connecting plates 3-7. When the internally threaded block 3-1 is screwed to the bottom to reach the supporting state, the pressing screw 3-8 can be used to support on the end face of the main bolt 1 for further reinforcement.

[0034] Furthermore, the inner support assembly 4 includes a central hole 4-1 which is opened inside the main bolt 1 and the secondary bolt 2. A groove 4-2 is opened at the bottom of the main bolt 1, and the groove 4-2 is communicated with the central hole 4-1. An inner support rod 4-3 is movably sleeved in the central hole 4-1. A convex block 4-4 is arranged at the lower end of the inner support rod 4-3. An inner support spring 4-5 is sleeved outside the inner support rod 4-3, and the inner support spring 4-5 is located in the groove 4-2.

[0035] In this embodiment, in order to achieve the effect of reinforcement through reverse supporting force, an inner support assembly 4 is designed. A central hole 4-1 is opened inside the main bolt 1 and the secondary bolt 2. A groove 4-2 is opened at the bottom of the main bolt 1 and is communicated with the central hole 4-1. An inner support rod 4-3 that can move up and down is sleeved in the central hole 4-1. A convex block 4-4 is arranged at the lower end of the inner support rod 4-3, and an inner support spring 4-5 is also sleeved. When the main bolt 1 is screwed in, the convex block 4-4 will maintain downward support through the elastic force of the inner support spring 4-5, and cooperate with the reinforcing support assembly 3 to form an opposite supporting force, which can reinforce the connection of the main bolt 1, and can help with thread removal through the elastic force when unscrewing, avoiding the situation of thread slipping.

[0036] Furthermore, a circular convex layer 5 is arranged on the surface of the internally threaded block 3-1, and a cap 6 is inserted and connected inside the circular convex layer 5.

[0037] In this embodiment, by arranging a circular convex layer 5 and a cap 6 on the top of the internally threaded block 3-1, the cap 6 can be inserted into the circular convex layer 5 to protect the inner support rod 4-3 inside.

[0038] Furthermore, the cap 6 is made of rubber material, and there is a sealed and fitted connection between the cap 6 and the annular convex layer 5.

[0039] In this embodiment, due to the rubber material, a sealed and fitted effect can be achieved between the cap 6 and the annular convex layer 5, preventing water from entering the central hole 4-1.

[0040] Furthermore, the bottom surface of the reinforcement layer 3-4 is a matte anti-slip structural surface.

[0041] In this embodiment, through the matte anti-slip structural surface, the friction between the reinforcement layer 3-4 and the workpiece surface can be increased, forming an anti-sliding effect.

[0042] When installation is required, screw the main bolt 1 into the workpiece, and then turn the internal thread block 3-1 to move downward in the opposite direction of the main bolt 1. When turning downward, the limiting layer 3-5 fits on the workpiece surface, the column 3-3 moves upward and the elastic force of the compression spring 3-6 gradually increases. Stop when reaching the maximum pressure state, and control the connecting plate 3-7 to rotate to the same plane position as the end face of the main bolt 1. Then screw the compression screw 3-8 into the connecting plate 3-7 and press against the end face of the main bolt 1. When the main bolt 1 is screwed in, the central convex block 4-4 will form a downward supporting force through the inner support spring 4-5. When the main bolt 1 is stripped of its thread, it can be helped to come out through the elastic force, avoiding problems with the thread fit and being unable to move outward and upward to strip the thread.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double bolt head bolt with anti-slip wire, characterized in that: include A main bolt (1) and a secondary bolt (2), wherein the secondary bolt (2) is fixed to the upper end of the main bolt (1); A reinforcement support assembly (3), wherein the reinforcement support assembly (3) is arranged outside the auxiliary bolt (2); An internal support assembly (4), wherein the internal support assembly (4) is arranged inside the main bolt (1) and the auxiliary bolt (2); The reinforcement support assembly (3) comprises an internal thread block (3-1), the internal thread block (3-1) being screwed to the outside of the auxiliary bolt (2), a plurality of movable holes (3-2) being provided on the surface of the internal thread block (3-1), and a column (3-3) being sleeved and connected inside the movable hole (3-2).

2. A double bolt head bolt with anti-slip wire according to claim 1, characterized in that: A reinforcement layer (3-4) is arranged at the lower end of the column (3-3), a limiting layer (3-5) is arranged on the surface of the column (3-3), a pressure spring (3-6) is sleeved on the outside of the column (3-3), and connecting plates (3-7) are fixed between the columns (3-3).

3. A double bolt head bolt with anti-slip wire according to claim 2, characterized in that: A pair of connecting plates (3-7) are screwed with a clamping screw (3-8) through threads, the internal thread block (3-1) is a hexagonal structure, and the number of the columns (3-3) matches the number of the side surfaces of the internal thread block (3-1).

4. The double bolt head bolt with anti-slip wire according to claim 1, characterized in that: The inner support assembly (4) comprises a center hole (4-1), wherein the center hole (4-1) is opened inside the main bolt (1) and the auxiliary bolt (2), and a groove (4-2) is opened at the bottom of the main bolt (1), and the groove (4-2) is connected to the center hole (4-1).

5. A double bolt head bolt with anti-slip wire according to claim 4, characterized in that: An inner support rod (4-3) is movably sleeved in the center hole (4-1), a protrusion (4-4) is provided at the lower end of the inner support rod (4-3), an inner support spring (4-5) is sleeved outside the inner support rod (4-3), and the inner support spring (4-5) is located in the groove (4-2).

6. The double bolt head bolt with anti-slip wire according to claim 1, characterized in that: The surface of the internal thread block (3-1) is provided with an annular convex layer (5), and a cover cap (6) is inserted and connected inside the annular convex layer (5).

7. A double bolt head bolt with anti-slip wire according to claim 6, characterized in that: The cover cap (6) is made of rubber material, and the cover cap (6) and the annular convex layer (5) are sealed and connected.

8. The double bolt head bolt with anti-slip wire according to claim 2, characterized in that: The bottom surface of the reinforcement layer (3-4) is a frosted anti-slip structure surface.

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