Elastic strip self-locking insulation cap

Abstract

The utility model discloses an elastic strip self-locking insulation cap, and relates to the technical field of railway accessories. The elastic strip self-locking insulation cap comprises an elastic strip, the tail end of the elastic strip is provided with an insulation cap body, the side wall of the insulation cap body is provided with a notch, the bottom of the insulation cap body is provided with a plane boss, and the middle part of the elastic strip is provided with an arc-shaped protection groove with an open top; the insulating cap body and the arc-shaped protection groove are detachably arranged, so that the insulating cap body or the arc-shaped protection groove can be replaced after being damaged, the replacement cost is low, the elastic strip protection device is suitable for being used on elastic strips of various models, and the application range is wide; the insulating cap body can be directly buckled at the tail end of the elastic strip through the gap, so that the mounting is convenient, and the replacement is simple and convenient; due to the arrangement of the plane boss, the contact area between the insulation cap body and the steel rail is increased, the buckling stability is enhanced, the wear resistance of the insulation cap body is enhanced, and the service life is prolonged; the arc-shaped protection groove can play a role in insulation and does not influence the complete tight contact between the bottom surface of the lower flat gasket of the nut and the elastic strip, so that the stability of screwing the elastic strip by the nut is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of railway accessories, in particular to a spring-bar self-locking insulating cap. Background Art

[0002] The signal circuit of my country's railway lines is conducted by rails, and special locations require that the rails and connecting parts must be insulated. The Type I (A and B) and Type II spring clips used on railway lines are manufactured in accordance with TB / T1495.2-1992 "Spring Clip Type I Fastener Spring Clip" and TB / T3065.2-2002 "Spring Clip Type II Fastener Spring Clip" standards. The spring clip itself is a conductor. In order to avoid the red light band in the rail circuit, abnormal signals and driving safety caused by insulation between the spring clip and the rail, an insulating sleeve is installed at the end of the spring clip.

[0003] The existing insulating sleeve is fixed together with spring bars of different types by injection molding process, so that the insulating sleeve and the spring bar are designed as an integrated whole. When the insulating sleeve is damaged, the insulating sleeve cannot be replaced alone, but needs to be replaced together with the spring bar, which leads to high cost when replacing the insulating sleeve; in the process of injection molding the existing insulating sleeve onto spring bars of different types, the injection molding process is relatively cumbersome, which easily leads to problems of slow injection molding speed and low efficiency; and the axial cross-section of the existing spring bar and the insulating sleeve installed at the end of the spring bar is a circular structure, and there is line contact between the insulating sleeve and the rail, and the contact area is The small size of the spring clip easily leads to serious wear of the insulating sleeve and a short service life. In addition, in order to prevent the bottom of the spring clip from contacting the rail due to compression fatigue, an insulating sleeve is provided in the middle of the spring clip. The existing insulating sleeve is integrally arranged in the middle of the spring clip through an injection molding process. When the spring clip is fixed by a spiral spike, the bottom surface of the flat washer under the nut on the spiral spike contacts the insulating sleeve and the spring clip respectively. Because the insulating sleeve and the spring clip are not on the same plane, the flat washer under the nut is in an inclined state when the spring clip is fixed, which easily causes the bottom surface of the nut to have poor stability due to uneven force. Utility Model Content

[0004] The utility model aims to provide a spring-clip self-locking insulating cap, wherein a detachable insulating cap body is arranged at the end of the spring bar, and when the insulating cap body is damaged, the insulating cap body can be replaced alone, the replacement cost is low, and the utility model is applicable to various types of spring bars, and the application range is wide; the notch can be provided to directly buckle the insulating cap body on the end of the spring bar through the notch, and the installation is convenient, and the replacement is simple and convenient; a plane boss in surface contact with the rail is provided at the bottom of the insulating cap body, and the arrangement of the plane boss increases the contact area between the insulating cap body and the rail, enhances the stability of the spring bar buckling the rail, enhances the wear resistance of the insulating cap body, and prolongs the service life; the arrangement of the arc-shaped protective groove can play an insulating role, and does not affect the complete and close contact between the nut, the flat washer, and the spring bar, and improves the stability of the nut tightening the spring bar.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spring-bar self-locking insulating cap, comprising a spring bar, both ends of which are provided with an insulating cap body, a notch is provided on the side wall of the insulating cap body, a planar boss in contact with the rail is provided at the bottom of the insulating cap body, the bottom surface of the planar boss is set as a plane, and a top open arc-shaped protective groove is provided in the middle of the spring bar.

[0006] Preferably, the insulating cap body is configured as a semi-open cylindrical structure.

[0007] Preferably, the end of the elastic bar is detachably connected to the insulating cap body.

[0008] Preferably, the insulating cap body and the arc-shaped protective groove are both made of polyamide 661013B.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. In the utility model, a detachable insulating cap body is provided at the end of the spring bar. When the insulating cap body is damaged, it can be removed from the spring bar alone, and the insulating cap body can be replaced alone, thereby reducing the replacement cost. The insulating cap body and the arc-shaped protective groove are easy to carry during construction or maintenance, and can be directly removed from the spring bar for replacement when replacement is needed. The detachable insulating cap body and the arc-shaped protective groove are suitable for use on various types of spring bars, and have a wide range of applications.

[0011] 2. In the utility model, a notch is provided on the side wall of the insulating cap body. The notch can be directly buckled onto the end of the elastic bar through the notch, which is convenient for installation and replacement.

[0012] 3. In the utility model, a flat boss in surface contact with the rail is provided at the bottom of the insulating cap body. The provision of the flat boss increases the contact area between the insulating cap body and the rail, enhances the stability of the spring bar pressing the rail, enhances the wear resistance of the insulating cap body, and prolongs the service life.

[0013] 4. In the utility model, the arc-shaped protective groove is buckled in the middle of the elastic strip, and the arc-shaped protective groove is set to a top-open structure. After the arc-shaped protective groove is buckled in the middle of the elastic strip, the opening at the top of the arc-shaped protective groove is upward and the top surface is in the same plane as the upper surface of the elastic strip, so as to prevent the bottom surface of the flat washer under the nut from contacting the top surface of the arc-shaped protective groove during installation. The setting of the arc-shaped protective groove can play an insulating role without affecting the complete and close contact between the nut, the flat washer and the elastic strip, thereby improving the stability of the nut tightening the elastic strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 For this utility model Figure 1 Schematic diagram of the local decomposition structure;

[0017] Figure 4 For this utility model Figure 3 Schematic diagram of the local structure;

[0018] Figure 5 For this utility model Figure 4 Schematic diagram of the half-section structure of AA.

[0019] In the figure:

[0020] 1-elastic bar, 2-insulating cap body, 3-notch, 4-flat boss, 5-arc-shaped protective groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-5 As shown, the spring bar self-locking insulating cap includes a spring bar 1, combined with Figure 1 , Figure 2 and Figure 4 As shown, both ends of the elastic bar 1 are provided with insulating cap bodies 2. Furthermore, the insulating cap bodies 2 are provided with a semi-open cylindrical structure. The elastic bar 1 and the insulating cap bodies 2 are detachably connected. When the insulating cap bodies 2 provided at the ends of the elastic bar 1 are damaged, the damaged insulating cap bodies 2 can be removed from the elastic bar 1 separately, and a new insulating cap body 2 can be reinstalled at the ends of the elastic bar 1. The insulating cap bodies 2 can be replaced separately. The elastic bar 1 can be reused to reduce the replacement cost. The insulating cap bodies 2 and the arc-shaped protective grooves 5 are convenient to carry during construction or maintenance. If replacement is required, they can be directly removed from the elastic bar 1 for replacement. The detachable insulating cap bodies 2 and the arc-shaped protective grooves are suitable for use on various types of elastic bars 1, and have a wide range of applications.

[0023] Specifically in this embodiment, combined with Figure 3 , Figure 4 or Figure 5As shown, a notch 3 is provided on the side wall of the insulating cap body 2. Preferably, the notch 3 is configured to enable the insulating cap body 2 to be directly buckled on the end of the elastic bar 1 through the notch 3. After the notch 3 is buckled on the elastic bar 1, the insulating cap body 2 is fixed on the elastic bar 1 through the elastic force of the outer wall of the insulating cap body 2 to prevent it from falling. The notch 3 is configured to facilitate installation and simple and convenient replacement.

[0024] Specifically in this embodiment, combined with Figure 4 or Figure 5 As shown, a planar boss 4 in contact with the rail is provided at the bottom of the insulating cap body 2, and the bottom surface of the planar boss 4 is set to be a plane. Preferably, the bottom surface of the planar boss 4 is in surface contact with the rail. The setting of the planar boss 4 increases the contact area between the insulating cap body 2 and the rail, enhances the stability of the spring bar buckling the rail, enhances the wear resistance of the insulating cap body 2, and prolongs the service life.

[0025] Specifically in this embodiment, combined with Figure 1 , Figure 2 or Figure 3 As shown, an arc-shaped protective groove 5 with an open top is provided in the middle of the elastic strip 1. Preferably, the arc-shaped protective groove 5 is connected to the elastic strip 1 by snapping, and the opening at the top of the arc-shaped protective groove 5 is slightly smaller than the diameter of the elastic strip 1. After the arc-shaped protective groove 5 is installed on the elastic strip 1, the opening at the top of the arc-shaped protective groove 5 is upward to prevent the bottom surface of the flat washer under the nut from contacting the top of the arc-shaped protective groove 5 during installation. The setting of the arc-shaped protective groove 5 can play an insulating role without affecting the complete and close contact between the nut, the flat washer and the elastic strip 1, thereby improving the stability of the nut tightening the elastic strip 1. Further preferably, the insulating cap body 2 and the arc-shaped protective groove 5 are both made of polyamide 661013B, which can better play an insulating effect.

[0026] Working principle:

[0027] When the insulating cap body 2 is installed to the end of the elastic bar 1, the notch 3 on the insulating cap body 2 is firstly contacted with the arc surface of the end of the elastic bar 1, and then the insulating cap body 2 is pushed onto the elastic bar 1 with force, and the insulating cap body 2 is buckled on the end of the elastic bar 1 through the expansion of the notch 3, and then the insulating cap body 2 is pushed horizontally so that the end of the elastic bar 1 is pushed to the top of the inner side of the insulating cap body 2, and the insulating cap body 2 is fixed on the elastic bar 1 by the elastic force of the outer wall of the insulating cap body 2 to prevent the insulating cap body 2 from falling off; then the opening at the top of the arc-shaped protective groove 5 is contacted with the lower part of the middle part of the elastic bar 1, and the arc-shaped protective groove 5 is pushed upward with force, and the side wall of the arc-shaped protective groove 5 expands with the maximum diameter of the elastic bar 1, and then the arc-shaped protective groove 5 is tightly buckled on the elastic bar 1. When the middle part of the elastic bar 1 is bent due to fatigue and contacts the rail, the arc-shaped protective groove 5 can also play an insulating role.

[0028] When the spring clip 1 is used to fix the rail, the middle part of the spring clip 1 is firstly brought into contact with the sleeper, and then the end of the spring clip 1 is brought into contact with the rail through the planar boss 4 on the insulating cap body 2. If the bottom surface of the planar boss 4 cannot completely fit with the rail, the insulating cap body 2 can be rotated at the angle of the end of the spring clip 1. When the bottom surface of the planar boss 4 completely fits with the rail, the spring clip 1 is then fixed to the sleeper by spiral spikes to fix the rail. When replacing the insulating cap body 2, the fixing of the spring clip 1 is firstly canceled by the spiral spikes, and then the damaged insulating cap body 2 is removed from the end of the spring clip 1, and then the new insulating cap body 2 is installed on the spring clip 1 according to the above steps.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A spring-clip self-locking insulating cap, comprising a spring-clip (1), characterized in that: Both ends of the spring bar (1) are provided with an insulating cap body (2), a notch (3) is provided on the side wall of the insulating cap body (2), a planar boss (4) in contact with the rail is provided at the bottom of the insulating cap body (2), the bottom surface of the planar boss (4) is set as a plane, and a top open arc-shaped protective groove (5) is provided in the middle of the spring bar (1).

2. The spring-clip self-locking insulating cap according to claim 1, characterized in that: The insulating cap body (2) is configured as a semi-open cylindrical structure.

3. The spring-clip self-locking insulating cap according to claim 1, characterized in that: The end of the elastic bar (1) and the insulating cap body (2) are detachably connected.

4. The spring-clip self-locking insulating cap according to claim 1, characterized in that: The top surface of the open-top arc-shaped protective groove (5) arranged in the middle of the elastic bar (1) is in the same plane as the upper surface of the elastic bar (1), and a detachable connection is adopted between them.

5. The spring-clip self-locking insulating cap according to claim 1, characterized in that: The insulating cap body (2) and the arc-shaped protection groove (5) are both made of polyamide 66 (1013B).

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