Suspension nut expressed by polynomial curve

Abstract

The utility model discloses a suspension nut expressed by a polynomial curve, the longitudinal section of the suspension nut is of a structure similar to a T shape, the suspension nut is composed of a straight wall large-diameter section and a reducing suspension part, the appearance of the reducing suspension part is expressed by a polynomial curve function, and the transition between the straight wall large-diameter section and the reducing suspension part is smooth transition. The utility model has the beneficial effects that the polynomial curve function of the reducing suspension part is optimized, so that the load distribution at the matching part of the bolt and the nut is relatively uniform, the maximum stress is favorably reduced, the connection strength is improved, and the service life of the bolt and the nut is prolonged.

Description

Technical Field

[0001] The utility model relates to a novel suspension nut, in particular to a suspension nut represented by a polynomial curve. Background Art

[0002] Bolt and nut connections are widely used in mechanical manufacturing because of their convenient disassembly and assembly. However, when ordinary nuts are used in bolt and nut connections, the axial load will be unevenly distributed between the threads. The first thread circle at the nut support surface is subject to the largest load, and the load on each subsequent thread circle gradually decreases. The more threads are screwed together, the more significant the uneven load distribution is. After the 8th to 10th thread circle, the thread is almost not subject to load. Therefore, simply using thick nuts with many threads cannot improve the connection strength.

[0003] Therefore, it is necessary to design a new type of nut structure to reduce the load on the first circle of threads at the nut support surface and make the load on each circle of threads of the nut as uniform as possible to improve the connection strength of the bolt and nut. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and propose a suspension nut represented by a polynomial curve, which can make the load distribution on the entire threaded section relatively uniform, so as to reduce the maximum stress value, improve the strength of the threaded connection, and extend the service life of the bolt and nut.

[0005] The technical solution of the utility model is:

[0006] A suspension nut represented by a polynomial curve, wherein the longitudinal cross section of the suspension nut is a T-shaped structure, the outer peripheral surface of the suspension nut is composed of a straight wall large diameter section and a reduced diameter suspension part, wherein the shape of the reduced diameter suspension part is represented by a polynomial curve function, and the transition between the straight wall large diameter section and the reduced diameter suspension part is a smooth transition. The height of the straight wall large diameter section is L1, the height of the reduced diameter suspension part is L2, and the shape of the reduced diameter suspension part can be represented by the polynomial curve P n (x) = a n x n +a n-1 x n-1 +…+a1x+a0 represents.

[0007] The beneficial effects of the utility model are:

[0008] The utility model discloses a suspension nut represented by a polynomial curve. A reduced diameter suspension part of the suspension nut is represented by the polynomial curve. The reduced diameter suspension part is easy to be deformed. When the nut is tightened, the reduced diameter suspension part of the nut will be deformed, so that the load originally concentrated on the first circle of threads is effectively dispersed on each circle of threads of the nut. Compared with the prior art, the maximum stress of the threads is effectively reduced, the strength of the thread connection is improved, and the service life of the bolt and nut is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of an existing standard hexagonal round nut;

[0010] Figure 2 The suspension nut of the utility model is represented by a polynomial curve;

[0011] Figure 3 This is a diagram of the nut of the utility model in use;

[0012] Figure 4 It is a simulation experiment comparison of the load distribution results of the utility model and the existing standard hexagonal round nut.

[0013] Attached Figure 2 Marking description: 1-straight wall large diameter section, 2-boss of the suspension nut, 3-reduced diameter suspension part DETAILED DESCRIPTION

[0014] like Figure 2 As shown, a suspension nut represented by a polynomial curve has a T-shaped longitudinal cross-section. The suspension nut consists of a straight wall large diameter section and a reduced diameter suspension section, wherein the shape of the reduced diameter suspension section is represented by a polynomial curve function, and the transition between the straight wall large diameter section and the reduced diameter suspension section is a smooth transition. The height of the straight wall large diameter section is L1, and the height of the reduced diameter suspension section is L2. The suspension nut represented by the polynomial curve is modeled with the straight wall large diameter section at the bottom and the reduced diameter suspension section at the top, and the center of the model is taken as the coordinate origin. Points are taken on the right edge of the reduced diameter curve in sequence. The shape of the reduced diameter suspension section can be determined according to the point coordinates using a specific polynomial curve y=317.46x 2 -8.9841x+0.0638 means.

[0015] The straight-walled large-diameter section body of the optimized structure of the suspended nut represented by the polynomial curve is designed according to the national standard nut based on the use requirements.

[0016] The total length of the reduced diameter suspension part of the suspension nut represented by the polynomial curve is approximately 2 / 3 of the length of the round nut body.

[0017] The aperture of the reduced diameter suspension part of the suspension nut represented by the polynomial curve is still designed according to the national standard based on the aperture of the round nut body.

[0018] When in use, the reduced diameter suspension part of the utility model is directed toward contact with the connecting piece. Usually, the reduced diameter suspension part is screwed into the groove of the workpiece so that the boss of the suspension nut is in force contact with the working surface. Figure 3 shown. Figure 4 The simulation experiment comparison of the utility model and the existing standard hexagonal round nut results shows that the load originally concentrated on the first circle of threads is effectively dispersed on each circle of threads of the nut, effectively reducing the maximum stress of the threads, improving the strength of the threaded connection, and extending the service life of the bolts and nuts.

[0019] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A suspension nut represented by a polynomial curve, characterized in that: The longitudinal section of the suspension nut is T-shaped. The suspension nut is composed of a straight wall large diameter section and a reduced diameter suspension part, wherein the shape of the reduced diameter suspension part is represented by a polynomial curve function, and the transition between the straight wall large diameter section and the reduced diameter suspension part is a smooth transition; the height of the straight wall large diameter section is L1, the height of the reduced diameter suspension part is L2, and the shape of the reduced diameter suspension part can be represented by a polynomial curve P n (x) = a n x n +a n-1 x n-1 +…+a1x+a0 represents.

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