CN217149740U

CN217149740U - Improved generation rail fastener bullet strip

Info

Publication number: CN217149740U
Application number: CN202220761478.6U
Authority: CN
Inventors: 李善芒; 连星
Original assignee: Shanghai Xinfeng Railway Equipment Co ltd
Current assignee: Shanghai Xinfeng Railway Equipment Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-09
Anticipated expiration: 2032-04-02

Abstract

The utility model discloses an improved generation rail fastener bullet strip, its characterized in that: comprises an elastic strip body, wherein the elastic strip body comprises a middle toe and two side toes; the method is characterized in that: the section of the elastic strip body is circular with the diameter of 13-16 mm; the total elastic range of the middle toe is 16.8 mm-19.8 mm, and the effective elastic range of the middle toe is 10.8 mm-13.8 mm; each said side toe including a connecting end connected to said middle toe and a toe end; each toe end extends to form an extension section, and the included angle between the extension section and the horizontal plane is 3-5 degrees. The scheme optimizes the structural parameters of the elastic strip body and solves the problems that the existing fastener elastic strip is not enough in buckling pressure and reaches the fatigue period, so that the rail fastener elastic strip is broken and the serious accident of locomotive derailment is caused.

Description

Improved generation rail fastener bullet strip

Technical Field

The utility model relates to a rail fastener technical field, concretely relates to improved generation rail fastener bullet strip.

Background

With the rapid development of rail transit, the continuous improvement of train running speed and the rapid development of urban rail transit, fastener elastic strips are continuously developed as important components of railway rails, and the importance of the fastener elastic strips is more and more concerned.

In the prior art, the W-shaped fastener elastic strip is generally adopted in China, and the rail bottom is pressed by the rebound force formed after the rail elastic strip is downwards screwed down and extruded to deform to reach the preset deformation amount so as to prevent the rail from moving. However, in practical applications, the existing fastener elastic strip does not meet the quality requirement of high-speed railways due to the high-speed development of railway transportation. Heavy load transport speed's promotion and railway line's frequent use for wheel rail dynamic effect is showing the increase, and the locomotive has produced huge vibrations at the frequent in-process that traveles on the road, and the fatigue damage of fastener bullet strip is aggravated to this kind of phenomenon, thereby lead to the withholding force of fastener bullet strip not enough, and fatigue performance is poor, thereby shorten the life of fastener bullet strip, more can lead to the fracture of fastener bullet strip when serious, lead to the fact the production of the serious accident of locomotive derailment.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims at providing an improved generation rail fastener bullet strip.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an improved elastic strip of a rail fastener comprises an elastic strip body, a first connecting piece and a second connecting piece, wherein the elastic strip body comprises a middle toe and two side toes; the method is characterized in that: the section of the elastic strip body is circular with the diameter of 13-16 mm; the total elastic range of the middle toe is 16.8 mm-19.8 mm, and the effective elastic range of the middle toe is 10.8 mm-13.8 mm; each said side toe including a connecting end connected to said middle toe and a toe end; each toe end extends to form an extension section, and the included angle between the extension section and the horizontal plane is 3-5 degrees.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the included angle between each extension section and the horizontal plane is 3-5 degrees, so that the fastener elastic strip is tightly contacted with the rail.

2. In the scheme, each side toe of the fastener elastic strip is in a curved arch shape, and the optimum range of the arch height and the arch height of the fastener elastic strip is 32 mm-38 mm, so that the fastener elastic strip has the optimum fastening pressure value.

3. In the scheme, a flat table surface is arranged on the upper surface of the middle toe, so that the upper surface of the fastener elastic strip is in surface-to-surface contact with the lower surface of the bolt; the included angle between the platform surface and the horizontal plane is 3-6 degrees, the installation inclination of the fastener system is formed, and the anti-loosening effect of the bolt is improved.

4. In the scheme, the middle toe is U-shaped, and the minimum clearance at two ends of the two U-shaped openings of the middle toe is smaller than the clearance in the middle of the middle toe, so that the transverse movement of the bolt penetrating through the elastic strip of the fastener is prevented.

The working principle of the utility model is as follows:

the utility model discloses an improved iron rail fastener elastic strip, which comprises an elastic strip body, a middle toe and two side toes, wherein the middle toe is connected with the two side toes; the method is characterized in that: the section of the elastic strip body is circular with the diameter of 13-16 mm; the total elastic range of the middle toe is 16.8 mm-19.8 mm, and the effective elastic range of the middle toe is 10.8 mm-13.8 mm; each said side toe including a connecting end connected to said middle toe and a toe end; each toe end extends to form an extension section, and the included angle between the extension section and the horizontal plane is 3-5 degrees. The scheme optimizes the structural parameters of the elastic strip body and solves the problems that the existing fastener elastic strip is not enough in buckling pressure and reaches the fatigue period, so that the rail fastener elastic strip is broken and the serious accident of locomotive derailment is caused.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:

1. the utility model discloses a design two extension sections that have inclination for improved generation rail fastener bullet strip forms in close contact with the rail, thereby makes fastener bullet strip withhold the rail more reliable.

2. The utility model discloses a design arch height is 32mm ~38 mm's side toe, and total bullet journey scope is 16.8mm ~19.8mm, and the effective bullet journey scope of installation be 10.8mm ~13.8 mm's well toe and bullet strip body diameter for 13mm ~16 mm's improved generation rail fastener bullet strip for the withholding force of fastener bullet strip has obtained promoting widely, and satisfies the performance requirement of locomotive safe operation.

3. The utility model discloses an upper surface design at improved generation rail fastener bullet strip has inclination's platform face for when the bolt lies in this improved generation rail fastener bullet strip and connects, form the installation angle of a fastener system, reduced the not hard up possibility of bolt effectively.

Drawings

Fig. 1 is a top view of an embodiment of the present invention;

fig. 2 is a front view of an embodiment of the present invention;

fig. 3 is a side cross-sectional view of an embodiment of the present invention;

fig. 4 is a cross-sectional view of a fastener system for installing an embodiment of the present invention.

In the above drawings: 1. a spring bar body; 2. a middle toe; 3. a side toe; 4. a connecting end; 5. a toe end; 6. an extension section; 7. a platform surface; 8, two ends of the U-shaped opening; 9. a bolt; 10. a rail.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

The terms "upper" and "lower" are used herein as directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the protection schemes and the actual implementation directions.

Example (b): improved generation rail fastener bullet strip

Referring to fig. 1 to 4, the improved iron rail fastener elastic strip comprises an elastic strip body 1, wherein the elastic strip body 1 is w-shaped; the elastic strip body 1 is formed by a hot rolling process of spring steel, the section of the elastic strip body 1 is circular, the diameter D of the elastic strip body is 13 mm-16 mm, and the optimal diameter of the elastic strip of the fastener applicable to the embodiment is 14mm under the common condition so as to meet the requirements of optimal fastening pressure and fatigue test.

The elastic strip body 1 comprises a middle toe 2 and two side toes 3. The total elastic range H1 of the middle toe 2 is 16.8 mm-19.8 mm, the effective elastic range of the middle toe 2 is 10.8-13.8 mm, and under the condition, the improved iron rail fastener elastic strip has the best buckling pressure and fatigue performance.

The middle toe 2 is U-shaped, and the minimum clearance between two ends 8 at two U-shaped openings of the middle toe 2 is smaller than the clearance in the middle of the middle toe 2, so that the bolt 9 is prevented from transversely moving after penetrating through the elastic strip body 1 and fixing the fastener elastic strip on the rail 10. The optimum size of the minimum gap between the two ends 8 at the two U-shaped openings is less than 24 mm.

Each side toe 3 comprises a connecting end 4 and a toe end 5 which are connected with two ends 8 corresponding to the U-shaped opening of the middle toe 2; each toe end 5 is inclined upwards and extends to form an extension section 6, and the included angle theta 1 between each extension section 6 and the horizontal plane is 3-5 degrees. The optimum angle of the included angle theta 1 between the extension section 6 and the horizontal plane is 3 degrees, and the extension section 6 with the inclined angle can achieve the effect of tight contact between the elastic strip body 1 and the rail 10.

Each side toe 3 is in a curved arch shape, and the arch height H2 of the side toe 3 is 32 mm-38 mm when viewed from the side of the elastic strip body 1. The elastic strip body 1 of the embodiment is placed on a special mould, pressure is applied to two sides of the elastic strip body 1, and displacement and a pressure curve are recorded until an inflection point appears. And finally, on the premise of obtaining an inflection point abscissa, the numerical value of the displacement is adjusted back to 6mm, and the corresponding pressure ordinate value is the buckling pressure value. Through the buckling pressure test experiment, the toe end 5 of the elastic strip body 1 of the embodiment is obtained, and under the condition of 13mm displacement, the buckling pressure value is larger than 11.5kN, so that the requirement of the buckling pressure of the elastic strip of the fastener required by the heavy-duty rail is met.

A platform surface 7 is arranged on the upper surface of the middle toe 2, the number of the platform surfaces 7 is two, and each platform surface 7 is close to two ends 8 of the corresponding U-shaped opening of the middle toe 2. Through setting up platform face 7 can let the staff when the installation fastener bullet strip, with the lower surface of bolt 9 with platform face 7 forms the face-to-face contact, increase area of contact for the fastener system installation gets more reliable.

The platform surface 7 inclines outwards, and the included angle theta 2 between the platform surface and the horizontal plane is 3-6 degrees. The "outer side" is defined as follows: relatively close to the rail 10 is an inner side and relatively far from the rail 10 and connected to the inner side is an outer side. The included angle theta 2 forms the installation inclination of the fastener system, so that the anti-loosening effect of the bolt 9 is increased.

The heat treatment process of the improved rail clip of the embodiment is a quenching and tempering process to form a tempered sorbite or tempered troostite structure. The hardness range of the final product is HRC 42-50.5. And placing the elastic strip body 1 on a special fatigue machine with the frequency of 5-20 Hz and the amplitude of 3.5mm (+0.35mm, -3.15mm) to perform a residual deformation test. Under the condition that the pressing displacement is 13mm, excellent data that the elastic strip body 1 is not broken and the residual deformation amount is less than 2mm after 200 ten thousand times of cycle tests are obtained.

According to the improved iron rail fastener elastic strip, the punch structure of the production die is adjusted in the production process, so that the hot rolling impression on the surface of a finished product of the elastic strip body 1 is smooth and burr-free, the surface quality of the finished product is improved, and the crack source of the fastener elastic strip in fatigue fracture is reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. An improved elastic strip of a rail fastener comprises an elastic strip body (1), wherein the elastic strip body (1) comprises a middle toe (2) and two side toes (3); the method is characterized in that: the section of the elastic strip body (1) is circular with the diameter of 13-16 mm; the total elastic range of the middle toe (2) is 16.8-19.8 mm, and the effective elastic range of the middle toe (2) is 10.8-13.8 mm; each side toe (3) comprising a connecting end (4) connected to the middle toe (2) and a toe end (5); each toe end (5) extends to form an extension section (6), and the included angle between the extension section (6) and the horizontal plane is 3-5 degrees.

2. The improved rail clip spring strip of claim 1, wherein: each side toe (3) is in a curved arch shape, and the arch height of each side toe is 32-38 mm.

3. The improved rail clip spring strip of claim 1, wherein: a flat surface (7) is arranged on the upper surface of the middle toe (2), and the included angle between the flat surface (7) and the horizontal plane is 3-6 degrees.

4. The improved rail clip spring strip of claim 1, wherein: the middle toe (2) is U-shaped, and the minimum gap between two ends (8) at the U-shaped opening of the middle toe (2) is smaller than the gap in the middle of the middle toe (2).