Light bolt

Abstract

The utility model relates to the technical field of fastening connecting pieces, in particular to a light bolt. The light bolt comprises a head, a flange and a screw, the two ends of the flange are fixedly connected with the head and the screw respectively, the screw is provided with threads, a lightening hole is formed in the center of the head, a plurality of lightening grooves are formed in the periphery of the head at intervals, the length of the head is L, the length of the lightening hole is D, and L and D meet the condition that D is larger than 2 / 3 L and smaller than L. The weight reducing hole and the weight reducing grooves are formed in the head of the bolt, so that the weight of the bolt can be effectively reduced, and the bolt is light; compared with the prior art, the screw of the bolt is not provided with a weight reduction structure, the strength of the bolt can be guaranteed, the connection stability is improved, meanwhile, D is larger than 2 / 3L and smaller than L, the strength of the head can be guaranteed, the head is prevented from being damaged, and the bolt is convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of fastening connectors, in particular to a lightweight bolt. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener used with a nut. It is a type of fastener composed of a head and a screw rod. It needs to cooperate with a nut to be used for fastening and connecting two parts with through holes.

[0003] Bolts are commonly used parts for connecting automotive components. Currently, automobiles are developing towards the direction of low weight and low energy consumption. The number of bolts used in a single vehicle can reach thousands. Reducing the weight of each bolt can effectively reduce the weight of the whole vehicle. In the prior art, weight-reducing holes or weight-reducing grooves are usually provided in both the head and the screw rod, which can effectively reduce the weight of the bolt. However, the existence of the weight-reducing holes or weight-reducing grooves directly reduces the strength of the head and the screw rod, resulting in the head and the screw rod being easily damaged, affecting the installation of the bolt and reducing the connection strength of various parts of the vehicle.

[0004] Therefore, there is an urgent need for a lightweight bolt to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a lightweight bolt, which can make the bolt lightweight and keep sufficient strength to prevent the bolt from being damaged.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A lightweight bolt, comprising: a head, a flange and a screw rod. The two ends of the flange are respectively fixedly connected to the head and the screw rod. The screw rod is provided with threads. A weight-reducing hole is provided at the central position of the head. A plurality of weight-reducing grooves are spaced at intervals on the outer periphery of the head. The length of the head is L, and the length of the weight-reducing hole is D, and L and D satisfy: 2 / 3L < D < L.

[0008] As a preferred technical solution of the above lightweight bolt, the hole shape of the weight-reducing hole is a regular hexagon.

[0009] As a preferred technical solution of the above lightweight bolt, the groove shape of the weight-reducing groove is an arc shape.

[0010] As a preferred technical solution of the above lightweight bolt, six weight-reducing grooves are evenly spaced on the outer periphery of the head, and the side walls of the six weight-reducing grooves are connected to each other.

[0011] As a preferred technical solution of the above lightweight bolt, the diameter of the arc surface of the weight-reducing groove gradually increases from the end close to the flange to the end far from the flange.

[0012] As a preferred technical solution of the above-mentioned lightweight bolt, the extending direction of the bottom of the weight-reducing groove is arranged at an angle with the axial direction of the screw rod.

[0013] As a preferred technical solution of the above-mentioned lightweight bolt, the included angle between the bottom wall of the weight-reducing groove and the axial direction of the screw rod is 3°.

[0014] As a preferred technical solution of the above-mentioned lightweight bolt, the head, the flange and the screw rod are integrally arranged.

[0015] As a preferred technical solution of the above-mentioned lightweight bolt, the screw rod is provided with a threaded portion and a non-threaded portion, and the non-threaded portion is close to the flange.

[0016] As a preferred technical solution of the above-mentioned lightweight bolt, the lightweight bolt further includes a gasket, and the gasket is sleeved on the outer periphery of the non-threaded portion.

[0017] Advantages of the present utility model:

[0018] The present utility model provides a lightweight bolt. The lightweight bolt includes: a head, a flange and a screw rod. The two ends of the flange are respectively fixedly connected to the head and the screw rod. The screw rod is provided with threads. A weight-reducing hole is arranged at the center position of the head. A plurality of weight-reducing grooves are arranged at intervals on the outer periphery of the head. The length of the head is L, and the length of the weight-reducing hole is D, and L and D satisfy: 2 / 3L < D < L. By arranging the weight-reducing hole and a plurality of weight-reducing grooves on the head, the weight of the bolt can be effectively reduced, realizing the lightweight of the bolt; compared with the prior art, the screw rod of this bolt is not provided with a weight-reducing structure, which can ensure the strength of the bolt, improve the stability of the connection. At the same time, 2 / 3L < D < L can ensure the strength of the head, prevent the head from being damaged, and facilitate the installation of the bolt. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0020] Figure 1 Structural schematic diagram of the lightweight bolt provided by the embodiment of the present utility model Figure 1 ;

[0021] Figure 2 Structural schematic diagram of the lightweight bolt provided by the embodiment of the present utility model Figure 2 ;

[0022] Figure 3 This is a cross-sectional view of the lightweight bolt provided by the embodiment of the present utility model.

[0023] In the figure:

[0024] 1. Head; 11. Weight reduction hole; 12. Weight reduction groove; 121. Chamfer; 2. Flange; 3. Screw; 31. Threaded part; 32. Non-threaded part. Specific embodiments

[0025] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the sake of convenience in description, only the parts related to the present utility model are shown in the drawings rather than all the structures.

[0026] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above and over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0028] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0029] Such as Figure 1 and Figure 2As shown in the figure, the present utility model provides a light bolt. The light bolt includes: a head 1, a flange 2, and a screw rod 3. Specifically, both ends of the flange 2 are fixedly connected to the head 1 and the screw rod 3 respectively. The screw rod 3 is provided with threads. A weight-reducing hole 11 is provided at the central position of the head 1. A number of weight-reducing grooves 12 are spaced at intervals on the outer periphery of the head 1. The length of the head 1 is L, and the length of the weight-reducing hole 11 is D, and L and D satisfy: 2 / 3L < D < L. By providing the weight-reducing hole 11 and a number of weight-reducing grooves 12 on the head 1, the weight of the bolt can be effectively reduced, realizing the lightweight of the bolt. Compared with the prior art, the screw rod 3 of this bolt is not provided with a weight-reducing structure, which can ensure the strength of the bolt and improve the connection stability. At the same time, 2 / 3L < D < L can ensure the strength of the head 1 and prevent the head 1 from being damaged, facilitating the installation of the bolt.

[0030] Optionally, the cross-section of the weight-reducing hole 11 is a regular hexagon, which can be installed and disassembled using an internal hexagonal wrench, improving the versatility of the bolt. Further, the light bolt can be provided with two weight-reducing holes 11 of different sizes, and thus is applicable to two different specifications of internal hexagonal wrenches.

[0031] Optionally, the cross-section of the weight-reducing groove 12 is arc-shaped, and the arc surface is concave towards the head 1, which can increase the volume of the weight-reducing groove 12, and thus reduce more weight, further realizing the lightweight of the bolt.

[0032] Further, in this embodiment, six weight-reducing grooves 12 are evenly spaced on the outer periphery of the head 1. The side walls of the six weight-reducing grooves 12 are connected to each other, making the structure of the bolt head 1 more regular, facilitating the use of a socket, making the installation and disassembly of the bolt more convenient, and improving the versatility of the bolt. At the same time, the connection of the side walls of the weight-reducing grooves 12 to each other can ensure the structural strength of the head 1 and is not easily damaged by the socket. Of course, in some other embodiments, the number of the weight-reducing grooves 12 is determined according to actual needs and will not be elaborated here.

[0033] Further, a chamfer 121 is provided at the connection of the side walls of two adjacent weight-reducing grooves 12, improving the smoothness of the bolt, preventing the bolt from stabbing the staff or the vehicle structure, and at the same time, facilitating the insertion into the socket and improving the installation efficiency.

[0034] Optionally, the diameter of the arc surface of the weight-reducing groove 12 gradually increases from the end close to the flange 2 to the end far from the flange 2. Specifically, the diameter of the arc surface of the weight-reducing groove 12 at the end close to the flange 2 is smaller than the diameter at the end far from the flange 2, which can increase the connection area between the head 1 of the bolt and the flange 2, and thus improve the firmness of the connection between the head 1 of the bolt and the flange 2.

[0035] Optionally, the extension direction of the bottom of the weight-reducing groove 12 is set at an angle to the axial direction of the screw 3, and the large diameter end of the arc surface of the weight-reducing groove 12 is recessed into the head 1 of the bolt, further reducing the weight of the head 1 and achieving further lightweighting of the bolt.

[0036] Alternatively, if Figures 1 to 3 As shown, the angle between the bottom wall of the weight-reducing groove 12 and the axial direction of the screw rod 3 is 3°. Specifically, the axial inclination angle of the bottom wall of the weight-reducing groove 12 is α, where α=3°, so that the head 1 of the bolt can ensure the strength and performance of the bolt head 1 while reducing the weight as much as possible, prevent the bolt head 1 from being easily damaged, resulting in low installation efficiency, and reduce waste caused by bolt breakage.

[0037] Optionally, the head 1, flange 2 and screw 3 are integrated to improve the strength of the bolt and increase the service life of the bolt. Specifically, the head 1, flange 2 and screw 3 are directly formed by cold heading using a specific mold to ensure the strength and performance of the bolt and avoid defects such as pits.

[0038] Optionally, the screw rod 3 is provided with a threaded portion 31 and a non-threaded portion 32, and the non-threaded portion 32 is close to the flange 2. Such a configuration can reduce the difficulty of processing and is conducive to mass production of bolts.

[0039] Furthermore, the light bolt also includes a gasket, which is sleeved on the outer periphery of the non-threaded portion 32. Such a configuration can increase the area between the bolt and the connecting piece when the bolt is installed, improve the connection strength between the connecting pieces, and improve the stability of the vehicle; at the same time, the gasket can play an anti-loosening role, prevent the bolt from loosening, and improve the stability between the connecting pieces.

[0040] Optionally, the gasket is a rubber part, which can prevent the connecting part from being scratched by the flange 2. At the same time, the rubber is light in weight, which can make the bolt lighter.

[0041] Optionally, in this embodiment, the flange 2 is an umbrella-shaped structure, which can provide effective support for the bolts while reducing weight, and can improve the connection strength between two adjacent connecting members. Of course, in some other embodiments, the shape of the flange 2 can be any polygon, a regular shape, or an irregular shape, which will not be repeated here.

[0042] Optionally, the head 1, flange 2 and screw 3 are all made of light high-strength materials, which can reduce the weight of the bolt as much as possible while ensuring the strength and performance of the bolt. Furthermore, the light high-strength material can be aluminum-lithium alloy, titanium-aluminum alloy, magnesium alloy, beryllium alloy and titanium alloy, etc., which can ensure the strength, performance and lightness of the bolt while also having anti-fatigue and corrosion resistance.

[0043] In addition, the above are only the preferred embodiments of the present utility model and the applied technical principles. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. A light bolt, characterized in that, Including: A head (1), a flange (2) and a screw (3), wherein both ends of the flange (2) are fixedly connected to the head (1) and the screw (3) respectively. The screw (3) is provided with threads. A weight-reducing hole (11) is provided at the center position of the head (1). A plurality of weight-reducing grooves (12) are provided at intervals on the outer periphery of the head (1). The length of the head (1) is L, and the length of the weight-reducing hole (11) is D, and L and D satisfy: 2 / 3L < D < L.

2. The light bolt according to claim 1, characterized in that, The hole shape of the weight-reducing hole (11) is a regular hexagon.

3. The light bolt according to claim 1, characterized in that, The groove shape of the weight-reducing groove (12) is an arc shape.

4. The light bolt according to claim 3, wherein Six weight-reducing grooves (12) are evenly spaced on the outer periphery of the head (1), and the side walls of the six weight-reducing grooves (12) are connected to each other.

5. The light bolt according to claim 3, characterized in that, The diameter of the arc surface of the weight-reducing groove (12) gradually increases from one end close to the flange (2) to the other end far from the flange (2).

6. The light bolt according to claim 4, characterized in that, The extending direction of the bottom of the weight-reducing groove (12) is arranged at an angle with the axial direction of the screw (3).

7. The light bolt according to claim 5, wherein The included angle between the bottom wall of the weight-reducing groove (12) and the axial direction of the screw (3) is 3°.

8. The light bolt according to any one of claims 1-7, characterized in that, The head (1), the flange (2) and the screw (3) are integrally provided.

9. The light bolt according to any one of claims 1-7, characterized in that, The screw (3) is provided with a threaded portion (31) and a non-threaded portion (32), and the non-threaded portion (32) is close to the flange (2).

10. The light bolt according to claim 9, characterized in that, The light bolt further includes a gasket, and the gasket is sleeved on the outer periphery of the non-threaded portion (32).

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