Variable diameter w-shaped elastic strip for high-speed rail fastener

Abstract

The utility model discloses a high -speed rail fastener is with variable diameter W type elastic strip, and W type elastic strip has two outer stretch turning portions, two inner stretch extension parts and an inner middle turning portion, and the intermediate connecting section is connected to the outer stretch turning portion and the inner middle turning portion, and the intermediate connecting section is arched upward, and the outer connecting section is connected to the outer stretch turning portion and the inner stretch extension part, and the outer connecting section is arched upward, and the outer connecting section includes the first outer connecting section close to the inner stretch extension part and the second outer connecting section close to the outer stretch turning portion, and the section diameter of the inner stretch extension part is D1, and the section diameter of the first outer connecting section is D1, and the section diameter of the second outer connecting section is D2, and the section diameter of the outer stretch turning portion is D2, and the section diameter of the intermediate connecting section is D1, and the section diameter of the inner middle turning portion is D1, and D2D1. The utility model discloses the variable diameter W type elastic strip that is formed through the cross section change of careful design, and it has the remarkable advantage in stress distribution, fatigue life, bearing capacity and adaptability etc.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed rail fastener technology, specifically relating to a variable diameter W-shaped elastic bar for high-speed rail fasteners. Background Technology

[0002] The elastic rail is a key component that stably secures the rails to the track, ensuring the distance between the two rails and maintaining the linearity of railway vehicle operation. As the most critical component of railway fasteners, its quality and performance directly affect the fastening force, fatigue life, and track safety of the fastener system.

[0003] Elastic clips are key elastic elements in railway fastening systems. They provide continuous fastening force through elastic deformation, buffering train impacts and ensuring track stability. Traditional uniform diameter elastic clips have been used for a long time due to their simple structure and ease of manufacturing, but their performance limitations are becoming increasingly apparent.

[0004] With the development of engineering technology and the increasing demands for mechanical performance, traditional constant cross-section diameter elastic bars can no longer meet engineering requirements. Therefore, this applicant proposes a variable cross-section diameter elastic bar, which, through carefully designed cross-sectional changes, can achieve more optimized stress distribution and deformation characteristics. Utility Model Content

[0005] The purpose of this utility model is to provide a variable diameter W-type elastic bar for high-speed rail fasteners.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A variable diameter W-shaped elastic bar for high-speed rail fasteners, the W-shaped elastic bar has two outwardly extending bends, both of which bend downwards simultaneously; the W-shaped elastic bar has two inwardly extending portions; the W-shaped elastic bar has one inner bend, which also bends downwards simultaneously.

[0008] The connecting section between the outward bend and the inward bend is the middle connecting section, which arches upward.

[0009] The outer connecting section connects the outward bend and the inward extension, and the outer connecting section arches upward; the outer connecting section includes a first outer connecting section near the inward extension and a second outer connecting section near the outward bend.

[0010] The cross-sectional diameter of the inner extension is D1, the cross-sectional diameter of the first outer connecting section is D1, the cross-sectional diameter of the second outer connecting section is D2, the cross-sectional diameter of the outer turning section is D2, the cross-sectional diameter of the middle connecting section is D1, the cross-sectional diameter of the inner turning section is D1, and D2 > D1.

[0011] Furthermore, the two inner extensions have extension segments that extend horizontally toward the centerline.

[0012] Furthermore, the two intermediate connecting segments have equally spaced gaps.

[0013] Furthermore, the first outer connecting segment and the second outer connecting segment are connected by a first gradient segment, and the outward turning part and the middle connecting segment are connected by a second gradient segment.

[0014] Furthermore, the W-shaped elastic bar is a one-piece molded structure with smooth transitions between its various parts.

[0015] The beneficial effects of this utility model are:

[0016] This invention creates a variable-diameter W-shaped elastic bar through a carefully designed cross-sectional change, which has significant advantages in stress distribution, fatigue life, load-bearing capacity and adaptability.

[0017] Variable diameter elastic clips can achieve a reasonable distribution of stress along the length direction, avoiding local stress concentration. The optimized stress distribution not only improves the load-bearing capacity of the clip but also significantly extends its service life. Because stress concentration is avoided, the rate of damage accumulation under cyclic loading is greatly reduced, which significantly improves railway operation safety and reduces maintenance costs.

[0018] Variable diameter spring clips improve the load-bearing capacity and deformation characteristics of the spring clips. By rationally designing the cross-sectional change law, the spring clips can exhibit ideal stiffness characteristics at different deformation stages.

[0019] Due to its variable cross-section characteristics, the natural frequency range of the variable diameter elastic clip will greatly avoid the track vibration generated during track operation, which has a good effect on reducing the corrugation of the train wheelset on the rail and the overload fracture of the elastic clip caused by resonance. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 This is a top view of the present invention;

[0022] Figure 3 This is the front view of this utility model;

[0023] Figure 4 yes Figure 3 Schematic diagram of the A-A cross section.

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] like Figures 1 to 4 As shown in the figure, this embodiment discloses a variable diameter W-shaped elastic bar for high-speed rail fasteners. The W-shaped elastic bar has two outwardly extending bends 1, which are bent downwards simultaneously. During installation, the two outwardly extending bends 1 are used to cooperate with the gauge baffle of the fastener.

[0027] The W-type spring clip has two inner extensions 2, each with an extension section extending horizontally towards the centerline. During installation, the two inner extensions 2 mate with the insulating baffle seat of the fastener.

[0028] The W-shaped spring bar has an inner bend 3, which bends downwards at the same time.

[0029] The intermediate connecting section 4 connects the outwardly extending bend 1 and the inner bend 3. The intermediate connecting section 4 arches upward. The two intermediate connecting sections have equal gaps. When installing the elastic clip, bolts are inserted between the two intermediate connecting sections 4 to press the elastic clip down and fix it.

[0030] The outer connecting section 5 connects the outwardly extending bend portion 1 and the inwardly extending extension portion 2. The outer connecting section 5 arches upward. The outer connecting section 5 includes a first outer connecting section 51 near the inwardly extending extension portion and a second outer connecting section 52 near the outwardly extending bend portion.

[0031] The cross-sectional diameter of the inner extension 2 is D1, the cross-sectional diameter of the first outer connecting section 51 is D1, the cross-sectional diameter of the second outer connecting section 52 is D2, the cross-sectional diameter of the outer extension turning section 1 is D2, the cross-sectional diameter of the middle connecting section 4 is D1, the cross-sectional diameter of the inner-middle turning section 3 is D1, and D2 > D1.

[0032] In this embodiment, D2 is 16mm and D1 is 14mm.

[0033] In this embodiment, the first outer connecting segment 51 and the second outer connecting segment 52 are connected by the first gradient segment 61, and the outward turning part 1 and the intermediate connecting segment 4 are connected by the second gradient segment 62.

[0034] In this embodiment, the W-shaped spring clip is a one-piece molded structure with smooth transitions between all parts. Its material can be traditional high-strength alloy steel or titanium alloy, etc. The spring clip undergoes surface treatment technologies such as shot peening and nitriding to improve its fatigue life and corrosion resistance.

[0035] The most significant structural advantage of the variable diameter elastic clip provided in this embodiment lies in its optimized stress distribution characteristics. Through carefully designed cross-sectional changes, the variable diameter clip can achieve a reasonable distribution of stress along its length, avoiding localized stress concentration. Theoretical analysis and experimental studies show that the maximum stress value of the variable diameter clip during operation is typically 15-30% lower than that of a constant cross-section clip under the same conditions. This optimized stress distribution not only improves the clip's load-bearing capacity but also significantly extends its service life. In terms of fatigue life, the variable diameter clip exhibits a clear advantage. Due to the avoidance of stress concentration, the rate of damage accumulation under cyclic loading is greatly reduced. This can significantly improve the safety of railway operation and reduce maintenance costs. Another important advantage of the variable diameter clip is its excellent load-bearing capacity and deformation characteristics. By rationally designing the cross-sectional change pattern, the clip can exhibit ideal stiffness characteristics at different deformation stages.

[0036] Variable diameter spring clips can maximize the performance of track fastener spring clips, making the most of resources, significantly increasing the service life of products per unit weight, greatly improving material utilization and reducing maintenance costs.

[0037] Compared to traditional constant-section elastic clips, track fasteners using variable-diameter elastic clips offer more stable clamping force and longer maintenance cycles. Actual operational data shows that track fastener systems employing variable-diameter elastic clips can extend gauge retention time by 2-3 times, significantly reducing track maintenance workload and costs. In one high-speed railway project, the application of variable-diameter elastic clip fasteners reduced annual maintenance costs by approximately 40%.

[0038] Furthermore, the molding process of the variable diameter spring clip is not much different from that of the original spring clip. Only a modification is made to the molding mold to ensure that the diameter of the point of maximum stress changes after the spring clip is formed. The raw materials are readily available, and there is no need to purchase additional raw materials. The cost remains the same, making it easy to promote and apply.

[0039] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0040] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A variable diameter W-shaped elastic bar for high-speed rail fasteners, characterized in that: The W-shaped spring bar has two outward bending sections, both of which bend downwards simultaneously; the W-shaped spring bar has two inward extension sections; the W-shaped spring bar has one inner bending section, which bends downwards simultaneously. The connecting section between the outward bend and the inward bend is the middle connecting section, which arches upward. The outer connecting section connects the outward turning part and the inward extension part, and the outer connecting section arches upward; The outer connecting section includes a first outer connecting section near the inner extension portion and a second outer connecting section near the outer extension bend portion; The cross-sectional diameter of the inner extension is D1, the cross-sectional diameter of the first outer connecting section is D1, the cross-sectional diameter of the second outer connecting section is D2, the cross-sectional diameter of the outer turning section is D2, the cross-sectional diameter of the middle connecting section is D1, the cross-sectional diameter of the inner turning section is D1, and D2 > D1.

2. The variable diameter W-shaped elastic bar for high-speed rail fasteners according to claim 1, characterized in that: The two inner extensions have extensions that extend horizontally toward the centerline.

3. The variable diameter W-shaped elastic strip for high-speed rail fasteners according to claim 1, characterized in that: The two intermediate connecting sections have equally spaced gaps.

4. The variable diameter W-shaped elastic strip for high-speed rail fasteners according to claim 1, characterized in that: The first outer connecting segment and the second outer connecting segment are connected by a first gradient segment, and the outward turning part and the middle connecting segment are connected by a second gradient segment.

5. The variable diameter W-shaped elastic strip for high-speed rail fasteners according to any one of claims 1-4, characterized in that: The W-shaped elastic bar is a one-piece molded structure with smooth transitions between its parts.

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