High-strength bolt connecting structure

Abstract

The utility model discloses a high-strength bolt connecting structure which comprises a basic part and further comprises a reinforced connecting structure, the reinforced connecting structure comprises a part to be installed in butt joint with the basic part, a lower hole and an upper hole are formed in the butt joint portions of the basic part and the part to be installed respectively, and an expansion sleeve is installed in the middle of the upper hole and the lower hole in an inserted mode. Wing plates are arranged on the periphery of the expansion sleeve, and self-tapping screws are installed in the wing plates in a screwed mode. An extrusion plate is arranged in the expansion sleeve, outer expansion blades are arranged on the back of the extrusion plate on the expansion sleeve, an inner expansion sleeve is inserted into the expansion sleeve, inner expansion blades are arranged on the edge of the inner expansion sleeve, threads are arranged on the inner side of the inner expansion sleeve, a frame plate is arranged on the top of the inner expansion sleeve and fixedly connected with the edge of the expansion sleeve, and a main bolt is screwed into the surface of the threads. And a mounting hole is formed in one side of the main bolt. According to the utility model, through the arrangement of the reinforced threaded connection structure, the positioning and stabilizing effects of the device are improved by adding a three-point positioning type auxiliary positioning mode on the outside.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a high-strength bolt connection structure. Background Art

[0002] Threaded connection structure is a common mechanical connection method, widely used in engineering, construction, furniture, equipment manufacturing, daily necessities and other fields. Its basic principle is to use the thread path (spiral-shaped bumps and grooves) to fix two or more parts together to achieve the functions of fastening, positioning or transmitting torque and moment. Threaded connection mainly includes the following basic components and characteristics: 1. Screws and nuts: the most basic threaded connection, the screw is screwed into the nut to fasten the parts. The screw head is diverse, such as flat head, cross, hexagonal head, hexagon socket, etc., to adapt to different tightening tools. 2. Bolts and nuts: The bolts pass through the holes of the two parts and the nuts are fixed. Large diameter threads are often used for connection and large bearing capacity. 3. Studs: Both ends are threaded and there is no head in the middle. They are used to pass through the hole and fix on both sides. 4. Set screws: One end is sharp and the other end is threaded. It is knocked into the wood to fix and cannot be disassembled. 5. Self-tapping screws: The threads are cut into non-threaded materials by themselves, used for plastics and soft metals. 6. Special threads: such as fine pitch, coarse pitch, serration, interference pattern, to meet specific needs. The advantages of threaded connection include easy installation, disassembly, adjustability, ability to withstand tensile, compressive, shear and torsion forces, and wide range of applicable materials. Material strength, size, pattern, pre-tightening force, anti-loosening measures (such as spring washers, glue, locking agents), etc. should be considered during design. Threaded connection is the basis and an important part of engineering design. Correct selection and calculation ensures the safety and reliability of the structure.

[0003] A Chinese invention patent with application number CN207975181U discloses a high-strength bolt connection structure, which includes a bolt, a gasket is provided on one side of the bolt, a nut is provided on one side of the gasket, a groove is provided on one side of the nut, a shock absorbing device is provided in the gasket, and the shock absorbing device includes a first shock absorbing box, and a reset device is provided in one side of the first shock absorbing box, and the reset device includes a slide rail. The utility model provides a shock absorbing device in the gasket, which is conducive to a good buffering effect when the parts shake. The gasket is set in a square shape and is embedded in the groove of the nut at the same time, which is conducive to reducing the gap between the nut and the gasket, so that the nut and the gasket are not easy to separate when the parts shake, resulting in loose fixation. The buffer device is provided in the nut, which is conducive to offsetting the force generated when the parts shake, thereby further playing a fixing effect. The setting of the entire connection structure is conducive to making the parts tightly connected and not easy to loosen, and reducing the situation where the nut and the bolt are separated.

[0004] In the process of connecting the base part and the connected part, the threaded connection device of the prior art mainly adopts the combination of bolts and nuts, or adopts the complex structure in the comparative document CN207975181U to achieve the connection; however, these connection methods have the following defects: 1. The traditional threaded connection method mainly uses the spiral pre-tightening force of the bolt on the thread surface to achieve locking, and its force range is limited. Once the main bolt is damaged, it may cause the problem of loosening of the overall structure; 2. Although the threaded connector in the comparative document has achieved the effect of strengthening the connection, the structure is too complicated and has exceeded the use range of conventional bolts, and it basically has no practical effect. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a high-strength bolt connection structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-strength bolt connection structure, comprising a base member, and further comprising:

[0008] Strengthen the connection structure, the strengthened connection structure includes a to-be-installed part docked on the base part, the docking parts of the base part and the to-be-installed part are respectively provided with a lower hole and an upper hole, an expansion sleeve is inserted and installed in the middle part of the upper hole and the lower hole, a wing plate is arranged around the expansion sleeve, and a self-tapping screw is tightened and installed inside the wing plate;

[0009] An extrusion plate is arranged inside the expansion sleeve, an outer expansion leaf is arranged on the back of the extrusion plate on the expansion sleeve, an inner expansion sleeve is plugged and installed inside the expansion sleeve, inner expansion leaves are arranged on the edge of the inner expansion sleeve, a thread is arranged on the inner side of the inner expansion sleeve, a frame plate is arranged on the top of the inner expansion sleeve, the frame plate is fixedly connected to the edge of the expansion sleeve, a main bolt is screwed into the surface of the thread, and a mounting hole is arranged on one side of the main bolt.

[0010] A further technical solution is to install the expansion sleeve seamlessly with the upper hole and the lower hole.

[0011] According to a further technical solution, the structure of the wing plate is "L" shaped.

[0012] According to a further technical solution, the extruded plate is a conical protruding structure.

[0013] According to a further technical solution, welds are provided at the edges of the frame plate and the expansion sleeve.

[0014] According to a further technical solution, a gap is reserved between the expansion sleeve and the inner expansion sleeve.

[0015] Compared with the prior art, the utility model provides a high-strength bolt connection structure, which has the following beneficial effects:

[0016] By setting up a reinforced threaded connection structure, the positioning and stabilizing effect of the device is increased by adding a three-point positioning auxiliary positioning method on the outside; the double expansion sleeve expansion fixing method set inside not only increases the contact area and preload force of the expansion sleeve, but also the double-layer expansion sleeve increases the structural strength of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a high-strength bolt connection structure proposed by the utility model;

[0018] Figure 2 This is a structural schematic diagram of an overall exploded view of a high-strength bolt connection structure proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the AA cross-section structure of a high-strength bolt connection structure proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of the BB cross-section structure of a high-strength bolt connection structure proposed by the utility model.

[0021] In the figure:

[0022] 1. Basic parts; 2. Parts to be installed; 3. Strengthened connection structure; 4. Lower hole; 5. Upper hole; 6. Expansion sleeve; 7. Wing plate; 8. Self-tapping screws; 9. Extrusion plate; 10. External expansion leaf; 11. Internal expansion sleeve; 12. Internal expansion leaf; 13. Thread; 14. Frame plate; 15. Main bolt; 16. Mounting hole; 17. Weld; 18. Gap. DETAILED DESCRIPTION

[0023] 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 of the embodiments.

[0024] Example 1: Reference Figure 1 - Figure 4 , a high-strength bolt connection structure, including a base member 1, the base member 1 is the main body of the device. It also includes:

[0025] Strengthened connection structure 3, which improves and strengthens the simple threaded connection of the prior art, and increases the strengthening effect. Strengthened connection structure 3 includes a to-be-installed part 2 docked on a base part 1, and the to-be-installed part 2 is a component that needs to be installed; the docking parts of the base part 1 and the to-be-installed part 2 are respectively provided with a lower hole 4 and an upper hole 5, and the upper hole 5 and the lower hole 4 are traditional threaded holes; an expansion sleeve 6 is inserted and installed in the middle part of the upper hole 5 and the lower hole 4, and the expansion sleeve 6 increases the extrusion area between the expansion sleeve 6 and the upper and lower holes under the extrusion action of the internal main bolt 15, thereby increasing the preload force; the expansion sleeve 6 is provided with a wing plate 7 around it, and the wing plate 7 and automatic screws 8 are provided around the expansion sleeve 6 to increase the tightening effect. Self-tapping screws 8 are screwed and installed inside the wing plate 7;

[0026] The expansion sleeve 6 is provided with an extrusion plate 9 inside, and the main bolt 15 is pre-tightened by extruding the inner expansion leaf 12-extrusion plate 9-outer expansion leaf 10, and the outer expansion leaf 10 directly extrudes the inside of the upper and lower holes; the outer expansion leaf 10 is provided on the back of the extrusion plate 9 on the expansion sleeve 6, and the expansion effect is produced by the extrusion of the extrusion plate 9. The inner expansion sleeve 11 is plugged and installed inside the expansion sleeve 6, and the inner expansion leaf 12 is provided at the edge of the inner expansion sleeve 11, and the inner expansion leaf 12 is used to squeeze the outer expansion leaf 10; the inner side of the inner expansion sleeve 11 is provided with a thread 13, and the thread 13 is the part connected to the main bolt 15. The top of the inner expansion sleeve 11 is provided with a frame plate 14, which is fixedly connected to the edge of the expansion sleeve 6, and the surface of the thread 13 is screwed into the main bolt 15, and a mounting hole 16 is provided on one side of the main bolt 15.

[0027] A high-strength bolt connection structure, wherein the expansion sleeve 6 is seamlessly connected and installed with the upper hole 4 and the lower hole 5, so as to ensure that the pre-tightening force completely acts on the inner walls of the upper and lower holes.

[0028] A high-strength bolt connection structure, the structure of the wing plate 7 is "L"-shaped, which can ensure the stability of the wing plate 7.

[0029] A high-strength bolt connection structure, wherein the extrusion plate 9 is a conical protruding structure, which increases the effects of extrusion and torque transmission.

[0030] A high-strength bolt connection structure, a weld 17 is provided at the edge of the frame plate 14 and the expansion sleeve 6, and the weld 17 is used to weld and fix the expansion sleeve 6 and the inner expansion sleeve 11 to each other.

[0031] A high-strength bolt connection structure, a gap 18 is reserved between the expansion sleeve 6 and the inner expansion sleeve 11, the gap 18 is a reserved expansion space, under the climate change state of thermal expansion and contraction, the problem of hardening and damage caused by excessive locking force of the device is avoided.

[0032] In the actual creation process, the utility model aims to solve the following defects in the prior art: 1. The traditional threaded connection method mainly uses the spiral pre-tightening force of the bolt on the thread surface to achieve locking, and its force range is limited. Once the main bolt is damaged, it may cause the problem of loosening of the overall structure; 2. Although the threaded connector in the reference document achieves the effect of strengthening the connection, the structure is too complicated and has exceeded the use scope of conventional bolts. It basically has no practical effect; a strengthening connection structure is proposed in a targeted manner; 3.

[0033] The strengthened connection structure 3 improves the traditional simple threaded structure by setting up multiple expansion sleeves inside to increase the internal locking force and structural strength; by adding a three-point positioning automatic screw 8 structure on the outside, it achieves the effect of auxiliary fixing while assisting positioning, thereby increasing the tightening effect of the main bolt 15.

[0034] During installation, align the upper hole 5 of the part 2 to be installed with the lower hole 4 of the base part 1, and then insert the expansion sleeve 6 into the inside of the hole to achieve the effect of pre-positioning and strengthening. The frame plate 14 on the expansion sleeve 6 and the inner expansion sleeve 11 is fixed by plasma welding to ensure a reserved gap 18 between the two, the main function of which is to ensure expansion space. The main bolt 15 is screwed into the surface of the thread 13, and the main bolt 15 will squeeze the inner expansion leaf 12, and then the inner expansion leaf 12 will squeeze the extrusion plate 9, and the extrusion plate 9 will press the outer expansion leaf 10 on the expansion sleeve 6 against the inside of the upper hole 5 and the lower hole 4 to achieve the effect of expansion and extrusion. The wing plate 7 located on the outside of the expansion sleeve 6 is set to an L-shaped structure, which is arranged on the periphery of the device by a three-point positioning method, and finally tightened by the self-tapping screw 8 to the inside of the part 2 to be installed to achieve auxiliary fixation.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacement or change, which should be covered within the protection scope of the present invention.

Claims

1. A high-strength bolt connection structure, comprising a base member (1), characterized in that: Also includes: A reinforced connection structure (3), the reinforced connection structure (3) comprising a to-be-installed part (2) butted against a base part (1), the butting parts of the base part (1) and the to-be-installed part (2) being respectively provided with a lower hole (4) and an upper hole (5), an expansion sleeve (6) being inserted and installed in the middle part of the upper hole (5) and the lower hole (4), a wing plate (7) being provided around the periphery of the expansion sleeve (6), and a self-tapping screw (8) being screwed and installed inside the wing plate (7); An extrusion plate (9) is arranged inside the expansion sleeve (6), an outer expansion leaf (10) is arranged on the back of the extrusion plate (9) on the expansion sleeve (6), an inner expansion sleeve (11) is inserted and installed inside the expansion sleeve (6), an inner expansion leaf (12) is arranged at the edge of the inner expansion sleeve (11), a thread (13) is arranged on the inner side of the inner expansion sleeve (11), a frame plate (14) is arranged on the top of the inner expansion sleeve (11), the frame plate (14) is fixedly connected to the edge of the expansion sleeve (6), a main bolt (15) is screwed into the surface of the thread (13), and a mounting hole (16) is arranged on one side of the main bolt (15).

2. A high-strength bolt connection structure according to claim 1, characterized in that: The expansion sleeve (6) is installed in a seamless manner with the lower hole (4) and the upper hole (5).

3. A high-strength bolt connection structure according to claim 1, characterized in that: The wing plate (7) has an "L"-shaped structure.

4. A high-strength bolt connection structure according to claim 1, characterized in that: The extrusion plate (9) is a conical protruding structure.

5. A high-strength bolt connection structure according to claim 1, characterized in that: A weld (17) is provided at the edge of the frame plate (14) and the expansion sleeve (6).

6. A high-strength bolt connection structure according to claim 5, characterized in that: A gap (18) is reserved between the expansion sleeve (6) and the inner expansion sleeve (11).

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