Lightweight lock bolt

Abstract

The utility model discloses a light-weight check bolt which comprises a screw rod and a screw head, the screw rod is connected to one side of the screw head, the surface of the screw rod is provided with a Spiralock thread, the screw head is of a cylinder structure, ridges are evenly distributed on the periphery of the screw head, the adjacent ridges are connected through cambered surfaces, the cambered surfaces are bent towards the axis of the screw head, and a round notch is formed in the center of the screw head. A special-shaped groove is formed in the bottom of the screw. The anti-loosening bolt is reasonable and ingenious in structural design, the overall weight of the bolt is reduced through the cambered surface, the circular notch and the special-shaped groove, the strength of the bolt head cannot be reduced through combination of the ridge and the cambered surface, the spiralock threads on the threaded rod have good anti-loosening performance, and the anti-loosening performance effect is enhanced through reduction of the overall weight.

Description

Technical Field

[0001] This utility model relates to a lightweight anti-loosening bolt, belonging to the field of fastener technology. Background Technology

[0002] Bolts are used to connect and fix various equipment. A large number of bolts are often needed on a single piece of equipment. On one hand, bolts made of high-strength materials are inherently heavy; on the other hand, as the number of bolts increases, the total weight further increases, significantly increasing the weight of the equipment. This can lead to increased costs for equipment support devices and a corresponding increase in energy consumption for some drive components. The increased weight of the bolts also increases the radial force on the bolt threads, making them more prone to loosening. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, this utility model provides a lightweight anti-loosening bolt, which can reduce the weight of the bolt and play a role in preventing loosening.

[0004] To achieve this objective, the structure adopted in this utility model is: a lightweight anti-loosening bolt, including a screw and a screw head. The screw is connected to one side of the screw head. The surface of the screw is provided with a Spitzer thread. The screw head is a cylindrical structure with ridges evenly arranged around it. Adjacent ridges are connected to each other by an arc surface. The arc surface is bent toward the axis of the screw head. A circular notch is provided in the center of the screw head. A special groove is provided at the bottom of the screw.

[0005] A washer is provided on the side of the screw head that contacts the screw rod, and the diameter of the washer is larger than that of the screw head.

[0006] The width of the arc surface near the screw is smaller than that of the other end, and the depth of the arc surface near the screw is smaller than that of the other end.

[0007] The top of each ridge is set as a slope.

[0008] The irregular groove is a groove with a plum blossom-shaped longitudinal section.

[0009] The depth of the irregular groove is 1 / 4 to 1 / 3 of the screw length.

[0010] The irregular groove has a conical notch at one end near the screw head.

[0011] The Spiel thread includes a thread wound in a spiral on the screw, and one side of the longitudinal section of the thread has a slope with a 30° inclination.

[0012] The washer has an annular groove surrounding the screw on the side facing the screw, and the outer diameter of the annular groove is less than or equal to the diameter of the concentric circle containing the ridge.

[0013] Its beneficial effects are: the structure of this utility model is reasonable and ingenious. The arc surface, circular notch and irregular groove reduce the overall weight of the bolt. Furthermore, the combination of the ridge and the arc surface does not reduce the strength of the bolt head. The Spirod thread on the bolt has good anti-loosening performance. The reduction in overall weight enhances the anti-loosening performance. Attached Figure Description

[0014] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is the left view of this utility model;

[0017] Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components; a fixed connection can be welding or adhesive bonding. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figures 1-3The lightweight anti-loosening bolt shown includes a screw 1 and a screw head 2. The screw 1 is connected to one side of the screw head 2, and the axes of the screw 1 and the screw head 2 coincide. The surface of the screw 1 is provided with Spitzer threads, which have good anti-loosening performance. The screw head 2 has a cylindrical structure with ridges 5 evenly distributed around it. Adjacent ridges 5 are connected to each other by arc surfaces 3, which are bent towards the axis of the screw head 2. The combination of ridges 5 and arc surfaces 3 reduces the amount of material originally required for the screw head 2, thereby reducing the overall weight. At the same time, the ridges 5 and arc surfaces 3 provide good support and ensure the strength of the screw head 2. A circular notch 6 is provided in the center of the screw head 2, and a shaped groove 7 is provided at the bottom of the screw 1. The circular notch 6 and the shaped groove 7 further reduce the weight.

[0022] A washer 4 is provided on the side of the screw head 2 that contacts the screw rod 1. The diameter of the washer 4 is larger than that of the screw head 2. The washer 4 plays the role of evenly distributing pressure.

[0023] The width of the arc surface 3 near the screw 1 is smaller than that of the other end, and the depth of the arc surface 3 near the screw 1 is smaller than that of the other end. In the longitudinal section, the arc surface 3 and the screw head 2 form a trapezoidal structure, which ensures the support strength of the screw head 2 while minimizing the weight of the screw head.

[0024] The top of each ridge 5 is set as a slope. The slope design reduces weight on the one hand, and reduces the protrusion of the top of the ridge 5 on the other hand, so that the end face of the screw head 2 is more rounded and avoids scratching the equipment.

[0025] The irregular groove 7 is a groove with a plum blossom-shaped longitudinal section, which allows the screw 1 to be tightened with a plum blossom-shaped hex wrench through the irregular groove 7.

[0026] The depth of the irregular groove 7 is 1 / 4 to 1 / 3 of the length of the screw 1, which reduces the impact on the strength of the screw 1 while reducing its weight.

[0027] The irregular groove 7 is provided with a conical recess 8 at one end near the screw head 2. The conical recess 8 can further reduce the weight and facilitate the positioning of the Torx wrench.

[0028] The Spiral thread includes a thread 9 that is spirally wound on the screw. One side of the longitudinal section of the thread 9 has an inclined slope, which forms a 30° angle with the axis of the screw 1.

[0029] While ensuring strength and meeting tensile and load-bearing requirements, the overall weight of the bolt is reduced by 10%. The Spirod thread design improves the bolt's anti-loosening performance and makes the bolt's tightening force more reliable.

[0030] The washer 4 has an annular groove 10 surrounding the screw 2 on the side facing the screw 1. The outer diameter of the annular groove 10 is less than or equal to the diameter of the concentric circle containing the ridge 5. The annular groove 10 not only further reduces the overall weight, but also allows the washer 4 to deform slightly under pressure when the screw 1 is slightly shorter, allowing the screw 1 to penetrate further and increasing the connection strength.

[0031] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A lightweight anti-loosening bolt, comprising a screw (1) and a screw head (2), wherein the screw (1) is connected to one side of the screw head (2), characterized in that, The screw (1) has a Speckle thread on its surface. The screw head (2) is a cylindrical structure. Ridges (5) are evenly arranged around the screw head (2). Adjacent ridges (5) are connected to each other by an arc surface (3). The arc surface (3) bends toward the axis of the screw head (2). A circular notch (6) is provided in the center of the screw head (2). A shaped groove (7) is provided at the bottom of the screw (1).

2. The lightweight anti-loosening bolt according to claim 1, characterized in that, A washer (4) is provided on the side of the screw head (2) that contacts the screw rod (1), and the diameter of the washer (4) is larger than that of the screw head (2).

3. The lightweight anti-loosening bolt according to claim 1, characterized in that, The width of the arc surface (3) near the screw (1) is smaller than that of the other end, and the depth of the arc surface (3) near the screw (1) is smaller than that of the other end.

4. The lightweight anti-loosening bolt according to claim 1, characterized in that, The top of each ridge (5) is set as a slope.

5. The lightweight anti-loosening bolt according to claim 1, characterized in that, The irregular groove (7) is a groove with a plum blossom-shaped longitudinal section.

6. The lightweight anti-loosening bolt according to claim 1, characterized in that, The depth of the irregular groove (7) is 1 / 4 to 1 / 3 of the length of the screw (1).

7. The lightweight anti-loosening bolt according to claim 1, characterized in that, The irregular groove (7) has a conical notch (8) at one end near the screw head (2).

8. The lightweight anti-loosening bolt according to claim 1, characterized in that, The Spiel thread includes a thread (9) that is spirally wound on the screw, and one side of the longitudinal section of the thread (9) has a slope that is inclined at 30°.

9. The lightweight anti-loosening bolt according to claim 2, characterized in that, The gasket (4) has an annular groove (10) around the screw (1) on the side facing the screw (1), and the outer diameter of the annular groove (10) is less than or equal to the diameter of the concentric circle where the ridge (5) is located.

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