Lightweight bolt pair

Abstract

The light-weight bolt pair comprises a bolt and a nut, the bolt comprises a screw head and a screw rod, threads are arranged on the surface of the screw rod, the screw head is a polygonal cylinder, the face where each edge of the polygonal cylinder is located is in an arc shape and is sunken towards the center to form a first notch, a special-shaped groove is formed in the center of the bottom of the screw rod, and a threaded hole is formed in the center of the nut. The nut is a polygonal cylinder, and the plane where each edge of the polygonal cylinder is located is arc-shaped and sinks towards the center to form a second notch. The bolt pair is reasonable and ingenious in structural design, the notches of the screw head and the nut and the special-shaped grooves in the screw rod reduce the use of materials, the overall weight is reduced, and meanwhile the tensile strength and load holding of the bolt pair are guaranteed.

Description

Technical Field

[0001] This utility model relates to a lightweight bolt assembly, 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 needed on the same equipment. On the one hand, bolts made of high-strength materials are heavy. On the other hand, when the number of bolts increases, the total weight increases further, resulting in a significant increase in the weight of the equipment. This may increase the cost of the equipment's support devices and the energy consumption of some drive equipment will also increase accordingly. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, this utility model provides a lightweight bolt assembly that reduces its weight while ensuring the strength of the bolt assembly.

[0004] To achieve this objective, the structure adopted in this utility model is as follows: a lightweight bolt assembly, including a bolt and a nut. The bolt includes a bolt head and a bolt shank. The bolt shank surface is threaded. The bolt head is a polygonal prism. The face corresponding to each side of the polygonal prism is concave towards the center in an arc shape to form a first notch. An irregular groove is provided in the center of the bottom of the bolt shank. The nut has a threaded hole in the center. The nut is a polygonal prism. The face corresponding to each side of the polygonal body is concave towards the center in an arc shape to form a second notch.

[0005] One end of the screw head is connected to the screw rod, and the other end has a circular notch in the center. A first washer is provided at the end where the screw head is connected to the screw rod, and the diameter of the first washer is larger than the diameter of the screw head.

[0006] The longitudinal section of the irregular groove is shaped like a plum blossom, and the axis of the irregular groove coincides with the axis of the screw.

[0007] The irregular groove has a conical notch at the end near the screw head.

[0008] A second washer is provided at one end of the nut, and the diameter of the second washer is larger than the diameter of the nut.

[0009] Its beneficial effects are: the structure of this utility model is reasonable and ingenious. The concave openings of the screw head and nut, as well as the irregular grooves on the screw rod, reduce the use of materials and lower the overall weight. At the same time, the tensile strength and load-bearing capacity of the bolt pair are guaranteed. Attached Figure Description

[0010] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2This is a three-dimensional structural diagram of the bolt;

[0013] Figure 3 This is a cross-sectional view of the bolt.

[0014] Figure 4 This is a three-dimensional structural diagram of the nut. Detailed Implementation

[0015] 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.

[0016] 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.

[0017] 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.

[0018] like Figure 1 The lightweight bolt assembly shown includes bolt 1 and nut 2, which are threaded together. Figure 2 , Figure 3As shown, the bolt 1 includes a screw head 11 and a screw 12. One end of the screw 12 is connected to the screw head 11, and the other end is provided with a shaped groove 15. The axis of the shaped groove 15 coincides with the axis of the screw 12, and the length of the shaped groove 15 is 1 / 4 to 1 / 3 of the length of the screw 12. The screw head 11 is a polygonal prism. The face corresponding to each side of the polygonal prism is concave towards the center in an arc shape to form a second notch 14. The width of the first notch 14 near the screw 12 is smaller than that of the other side, and the depth of the first notch 14 near the screw 12 is smaller than that of the other side. Therefore, the surface area of ​​the screw head 12 in contact with the equipment is larger, and the supporting force is stronger. The protruding ridge tops between adjacent first notches 14 are chamfered, which reduces weight and reduces the protruding sharp corners on the screw head 11, making the surface of the screw head 11 smoother and avoiding contact and wear with the equipment. A circular notch is provided at the center of the end of the screw head 11 away from the screw rod 12, which reduces the material used for the bolt 1 and serves to position the fastening equipment. A first washer 16 is provided at the end of the screw head 11 near the screw rod 12. The diameter of the first washer 16 is larger than the diameter of the screw head 11, which increases the contact area between the bolt 1 and the equipment and distributes the pressure of the bolt 1.

[0019] The longitudinal section of the irregular groove 15 is plum blossom-shaped, which facilitates tightening from one end of the screw 12 using a plum blossom-shaped hex wrench. The end of the irregular groove 15 near the screw head is a conical notch 17, which facilitates the positioning of the plum blossom-shaped hex wrench.

[0020] like Figure 4 As shown, the nut 2 has a threaded hole 22 in the center. The nut 2 is a polygonal cylinder, and the face corresponding to each side of the polygonal body is concave towards the center in an arc shape to form a second notch 21. A second washer 23 is provided at one end of the nut 2, and the diameter of the second washer 23 is larger than the diameter of the nut 2. The width of the second notch 21 gradually increases and the depth gradually increases from one end near the second washer 23 to the other end, forming an arc-shaped slope. The top of the protruding ridge between adjacent second notches 21 is chamfered.

[0021] The structure of this utility model is reasonable and ingenious. The recesses of the screw head and nut, as well as the irregular grooves on the screw, reduce the amount of material used and lower the overall weight, while ensuring the tensile strength and load-bearing capacity of the bolt assembly.

[0022] 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. Lightweight bolt pair comprising a bolt (1) and a nut (2), characterized in that The bolt (1) comprises a screw head (11) and a screw rod (12), the screw rod (12) is provided with threads on the surface, the screw head (11) is a polygonal column, the surface corresponding to each side of the polygonal column is arc-shaped and recessed to the center to form a first notch (14), a special-shaped groove (15) is arranged at the bottom center of the screw rod (12), the center of the nut (2) is a threaded hole (22), the nut (2) is a polygonal column, the surface corresponding to each side of the polygonal main body is arc-shaped and recessed to the center to form a second notch (21).

2. The lightweight bolt pair according to claim 1, characterized by One end of the screw head (11) is connected with the screw rod (12), and the other end is provided with a circular notch (13) at the center, the end of the screw head (11) connected with the screw rod (12) is provided with a first gasket (16), and the diameter of the first gasket (16) is greater than the diameter of the screw head (11).

3. The lightweight bolt pair according to claim 1, characterized by The special-shaped groove (15) is plum blossom-shaped in the longitudinal section, and the axis of the special-shaped groove (15) coincides with the axis of the screw rod (12).

4. The lightweight bolt pair according to claim 1, characterized by The end of the special-shaped groove (15) close to the screw head (11) is a conical notch (17).

5. The lightweight bolt pair according to claim 1, characterized by One end of the nut (2) is provided with a second gasket (23), and the diameter of the second gasket (23) is greater than the diameter of the nut (2).

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