Lightweight aluminum alloy bolt

Abstract

The utility model discloses a light-weight aluminum alloy bolt which comprises a nut and a screw rod, threads are wound on the screw rod, adjacent teeth of the threads are in clearance fit to form grooves, and a plurality of grooves are combined to form a thread groove. A first hollow structure used for reducing the weight of the bolt and matched with the threads to improve the radial load bearing capacity of the screw is formed in the hollow portion of the screw, and a second hollow structure used for reducing the weight of the bolt and a loading piece used for being matched with the second hollow structure to improve the radial load bearing capacity of the nut are arranged on the nut. The bolt solves the problem that in the prior art, a bolt which is light in weight and high in load resistance is lacked.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt technical field, concretely is a kind of lightweight aluminum alloy bolt. BACKGROUND

[0002] In many fields such as mechanical manufacturing, aerospace, automobile industry, the performance requirement of parts is increasingly strict, and the performance of bolt, as a widely used connecting component, is directly related to the stability and reliability of the whole system. Traditional bolts are mostly made of ordinary steel, which has certain strength but is heavy. With the pursuit of energy saving and emission reduction and the improvement of equipment performance in the industry, lightweight design has become a key development direction. However, in the process of pursuing lightweight, the load capacity of the bolt cannot be sacrificed. The existing lightweight bolts often have to make a choice between the two, either too lightweight, resulting in a significant decrease in the ability to resist radial load and axial load, and deformation, fracture and other failure conditions are likely to occur when bearing larger external force, affecting the normal operation and safety of the equipment, or although the load capacity is guaranteed, the weight cannot meet the needs of some weight-sensitive fields. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a lightweight aluminum alloy bolt to solve the problem that there is no lightweight bolt with strong load capacity in the prior art.

[0004] To achieve the above purpose, the utility model provides a lightweight aluminum alloy bolt, which comprises a nut and a screw rod, a thread is wound on the screw rod, a gap is formed between adjacent teeth of the thread, and a groove is formed in the gap, and a thread groove is formed by combining a plurality of grooves, a first hollow structure is provided in the screw rod to reduce the weight of the bolt and improve the ability of the screw rod to bear radial load, and a second hollow structure is provided on the nut to reduce the weight of the bolt and a loading member is provided on the nut to cooperate with the second hollow structure to improve the ability of the nut to bear radial load.

[0005] The above technical solution has the following advantages: by providing a hollow first hollow structure on the screw rod and a second hollow structure on the nut, the overall weight of the bolt is greatly reduced. At the same time, the first hollow structure on the screw rod is not a simple weight reduction design. It cooperates with the thread in a clever way. When the screw rod is subjected to radial load, the first hollow structure makes the stress distribution inside the screw rod more uniform, effectively disperses external force, reduces the risk of deformation or fracture of the screw rod due to excessive radial force, and improves the reliability of the bolt connection. The loading member on the nut works with the second hollow structure, and the special design of the loading member can change the stress mode of the nut when it is subjected to radial load, dispersing concentrated stress to a larger area, ensuring that the connection between the nut and the screw rod is still stable in complex stress environment, and preventing the whole bolt connection from loosening due to nut failure.

[0006] The utility model further sets up: first hollow structure includes the first hollow groove of hollow setting in screw rod, first hollow groove presents helical line shape setting.

[0007] The beneficial adoption of the above technical scheme is that: in the above technology, the first hollow groove is arranged in the screw rod in a helical line shape, which, while achieving significant weight reduction, ingeniously utilizes the mechanical properties of the helical line to maintain the structural strength of the screw rod; compared with ordinary straight-line or simple hollow structures, the first hollow groove in a helical line shape can more evenly distribute the remaining material of the screw rod under the same hollow volume ratio, reducing stress concentration; when the screw rod is subjected to radial load, the first hollow groove in a helical line shape plays a unique stress dispersion role, and the shape of the helical line enables external forces to be gradually transmitted and dispersed to various parts of the screw rod along the helical trajectory, avoiding excessive local stress, and the helical line of the first hollow groove cooperates with the thread on the screw rod to produce a synergistic reinforcement effect. When the thread transmits torque and bears axial force, the first hollow groove in a helical line shape can assist the thread in more effectively dispersing and transmitting force, further optimizing the stress performance of the screw rod.

[0008] The utility model further sets up: first hollow groove and thread groove are misaligned.

[0009] The beneficial adoption of the above technical scheme is that: in the above technology, the first hollow groove is misaligned with the thread groove, changing the stress distribution pattern of the screw rod when it is under stress. When the bolt bears axial tension, the thread groove mainly bears force transmission, and the misaligned first hollow groove enables the internal material of the screw rod to more reasonably share axial force, avoiding stress concentration in a certain area.

[0010] The utility model further sets up: second hollow structure includes second hollow groove of setting on screw cap end face along screw rod length direction, second hollow groove radial section presents rectangle setting, second hollow groove bottom wall is provided with cross slot for outside screwdriver assembly and is twisted.

[0011] The beneficial adoption of the above technical scheme is that: in the above technology, the second hollow groove is arranged on the end face of the screw cap along the length direction of the screw rod, precisely removing the material in the non-critical stress area of the screw cap, significantly reducing the overall weight of the screw cap, the radial section of the second hollow groove is arranged in a rectangular shape, and the rectangular structure has excellent geometric stability and mechanical properties. When the screw cap bears axial pressure, transverse shear force or complex external force from different directions, the rectangular section can more effectively disperse stress evenly throughout the screw cap structure, and the cross slot arranged on the bottom wall of the second hollow groove perfectly matches the widely used screwdriver assembly, so that workers can easily tighten or loosen the bolt using a cross screwdriver without the need for special tools during actual assembly and maintenance.

[0012] The utility model further sets up: the loading piece includes setting in second hollow groove a plurality of loading sheet, the loading sheet radial section is triangularly set and loading sheet outer wall and second hollow groove inner wall connection setting, adjacent loading sheet gap cooperation setting.

[0013] The beneficial adoption of the above technical scheme is that a plurality of loading sheets are arranged in the second hollow groove, and the radial section of the loading sheet is triangular, which greatly improves the mechanical properties of the nut, the triangular structure has natural stability and high strength characteristics, when the nut is subjected to radial load, the triangular loading sheet can efficiently disperse external force to the inner wall of the second hollow groove and the entire nut structure, the adjacent loading sheets are gap-cooperatively arranged, so that stress can be more evenly transmitted and distributed between the loading sheets and between the loading sheets and the inner wall of the second hollow groove when the nut is subjected to stress.

[0014] The utility model further sets up that the screw rod and nut are all made of aluminum alloy material.

[0015] The beneficial adoption of the above technical scheme is that the screw rod and the nut are both made of aluminum alloy material in the above technology, and the aluminum alloy material has a low density, so that the bolt is lightweight. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the three-dimensional view of the utility model;

[0017] Figure 2 is the three-dimensional view of the top view of the utility model;

[0018] Figure 3 is the side sectional view of the utility model. DETAILED DESCRIPTION

[0019] The utility model provides a kind of lightweight aluminum alloy bolt, including nut 1 and screw rod 2, screw rod 2 is wound with thread 21, the gap of adjacent tooth of thread 21 is matched to form recess and several recesses are combined to form thread 21 groove, the first hollow structure for reducing the weight of bolt and being matched with thread 21 to improve the radial load capacity of screw rod 2 is hollow in screw rod 2, the second hollow structure for reducing the weight of bolt and the loading piece for being matched with second hollow structure to improve the radial load of nut 1 are provided on nut 1, the first hollow structure includes first hollow groove 22 hollow in screw rod 2, first hollow groove 22 is arranged in spiral line, first hollow groove 22 is disposed with thread 21 groove dislocation, the second hollow structure includes second hollow groove 11 being hollow in the length direction of screw rod 2 on the end face of nut 1, the radial section of second hollow groove 11 is arranged in rectangle, cross slot 111 for external screwdriver assembly is screwed and is provided on the bottom wall of second hollow groove 11, the loading piece includes several loading pieces 112 in second hollow groove 11, the radial section of loading piece 112 is arranged in triangle, and loading piece 112 outer wall is connected with the inner wall of second hollow groove 11, and the gap of adjacent loading piece 112 is matched, screw rod 2 and nut 1 are made of aluminum alloy material.

[0020] The above specification drawings are only schematic, and thread size and first hollow groove size can be adjusted according to actual needs.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model, and those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model, without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, these changes and improvements all fall within the scope of the claimed utility model, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A light-weight aluminum alloy bolt comprising a nut and a shank, the shank being threaded, the thread having a plurality of recesses formed between adjacent thread teeth in clearance fit, and a plurality of recesses combining to form a thread groove, characterized in that: The screw is hollowed to form a first hollow structure for reducing the weight of the screw and cooperating with the thread to improve the radial load capacity of the screw, and the nut is provided with a second hollow structure for reducing the weight of the nut and a loading piece for cooperating with the second hollow structure to improve the radial load capacity of the nut.

2. The light-weight aluminum alloy bolt according to claim 1, characterized in that: The first hollow structure comprises a first hollow groove hollowed in the screw, and the first hollow groove is arranged in a helix.

3. The light-weight aluminum alloy bolt according to claim 2, characterized in that: The first hollow groove is arranged in a staggered manner with the thread groove.

4. The light-weight aluminum alloy bolt according to claim 1, characterized in that: The second hollow structure comprises a second hollow groove hollowed on the end face of the nut along the length direction of the screw, and the radial section of the second hollow groove is arranged in a rectangular shape, and a cross slot is formed on the bottom wall of the second hollow groove for the external screwdriver assembly to be screwed.

5. The light-weight aluminum alloy bolt according to claim 4, characterized in that: The loading piece comprises a plurality of loading pieces arranged in the second hollow groove, and the radial section of the loading piece is arranged in a triangular shape, and the outer wall of the loading piece is connected with the inner wall of the second hollow groove, and the adjacent loading pieces are arranged in a clearance fit.

6. The light-weight aluminum alloy bolt of claim 1, wherein: The screw and the nut are both made of aluminum alloy.

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