Fastening bolt applied to high-speed rail overhead line system

Abstract

The utility model discloses a fastening bolt applied to a high-speed rail catenary. The fastening bolt comprises a stud and a fastening bolt, a clamping plane is arranged on the side face of the flat-head nut, a limiting groove is formed in the center of the clamping plane, and the limiting groove extends inwards to form a movable groove; and the movable block is slidably connected in the limiting groove and the movable groove, and an elastic piece is arranged between the inner side of the movable block and the movable groove. Compared with a common fastening bolt, the flat-head bolt and the lateral limiting groove are adopted to be matched with the wrench for bolt screwing, elastic tight positioning of the wrench and the movable block is achieved through the movable block connected with the elastic piece, and the problem that when the wrench is screwed, abutting against the bolt is not stable, and the rotating efficiency of the bolt is reduced is solved; by means of the design, the structure of the clamping portion of the wrench can be changed, dust on the portion can be pushed away and pushed out every time when the wrench is used, and the problem that follow-up bolt disassembly and assembly are difficult, and the wrench is difficult to insert, position and screw is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fastening bolts, in particular to a fastening bolt used for a high-speed railway contact network. Background Art

[0002] High-speed rail contact networks are mainly used in open outdoor environments with high dust content and obvious environmental erosion. The use of bolts is greatly affected by external environmental erosion, which reduces their service life. Common flat-head bolts use a structure with cross, flat, hexagonal and other shaped countersunk holes on the top of the nut for easy installation. This structure is filled with external dust and eroded, making it difficult for the corresponding screwdriver to cooperate with the countersunk hole for disassembly and assembly. In addition, when the bolt is tightened with a tightening tool, the tool and the bolt are not in stable contact, and the two are prone to produce a deflection angle, which reduces the efficiency of the bolt rotation. Utility Model Content

[0003] The purpose of the utility model is to solve the problems that the fastening bolts used in the high-speed railway contact network are greatly affected by the erosion of the external environment and have a reduced service life. The countersunk holes of the common flat-head bolts are combined with the installation method of the fastening tool. Under the filling and erosion of external dust, the corresponding screwdriver is difficult to cooperate with the countersunk holes for disassembly and assembly, and when the bolts are tightened with the fastening tools, the tool and the bolt are unstable in contact, and the two are prone to produce a deflection angle, which reduces the rotation efficiency of the bolt. A fastening bolt used in the high-speed railway contact network is provided.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a fastening bolt applied to a high-speed railway contact network, comprising:

[0005] studs;

[0006] A flat head nut, a clamping plane is arranged on the side, a limiting groove is arranged in the center of the clamping plane, and a movable groove is extended inwardly from the limiting groove;

[0007] The movable block is slidably connected in the limiting groove and the movable groove, and an elastic member is arranged between the inner side of the movable block and the movable groove.

[0008] As a further description of the above technical solution:

[0009] The limiting groove extends to the top surface of the flat head nut, and the flat head nut is provided with an abutment platform at the bottom of the limiting groove.

[0010] As a further description of the above technical solution:

[0011] A lower guide bar is arranged on the top surface of the abutment platform, and the lower guide bar is arranged to raise the movable block.

[0012] As a further description of the above technical solution:

[0013] A lower stopper is arranged on the top of the lower guide bar and is used for the movable block to slide and limit in the limiting groove. The lower stopper is slidably connected in the first sliding groove at the bottom of the movable block.

[0014] As a further description of the above technical solution:

[0015] The top surface of the movable block is an arc surface with increasing height from the outside to the inside and from the two sides to the center. The top of the movable groove is provided with an arc stopper for limiting the movable block.

[0016] As a further description of the above technical solution:

[0017] A side guide bar is arranged on the side of the movable groove, and the second sliding groove on the side of the movable block is slidably connected in the side guide bar.

[0018] As a further description of the above technical solution:

[0019] A stepped embedding block and a truncated cone sealing block are also arranged between the stud and the flat head nut. The embedding block and the sealing block extend from the top surface of the stud to the bottom surface of the flat head nut with increasing cross-sections.

[0020] In summary, due to the adoption of the above technical solution, the utility model has the following advantages compared with the prior art:

[0021] Beneficial effects:

[0022] Compared with common fastening bolts, this design adopts flat-head bolts and sideways limit grooves, and cooperates with a wrench to tighten the bolts. By connecting the movable block of the elastic part, the wrench and the movable block are elastically and tightly positioned to avoid the problem of unstable contact with the bolt when the wrench is tightened, resulting in a deflection angle and reduced bolt rotation efficiency. After the fastening bolt is rotated, the wrench can be directly pulled out upwards, so that the elastic part drives the movable block to pop out and reset. This design allows the structure of the clamping part of the wrench to change before and after use. Each time it is used, the dust in this part can be dispersed and pushed out, and then the dust is cleaned through daily inspections of the high-speed rail contact network and bolt tightness inspections, so that the problems of filling the holes and grooves caused by dust accumulation in this part, subsequent bolt disassembly and assembly, and difficulty in inserting, positioning and screwing the wrench are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a front view of a fastening bolt used in high-speed railway contact network.

[0025] Figure 2 The figure is a side cross-sectional view of a fastening bolt used in a high-speed railway contact network.

[0026] Figure 3 The present invention is a side cross-sectional view of a flat head nut used in a fastening bolt for a high-speed railway contact network.

[0027] Figure 4 The front view of a fastening bolt used in high-speed railway contact network with the movable block hidden.

[0028] Legend:

[0029] 1. Stud; 2. Flat head nut; 3. Clamping plane; 4. Limiting groove; 5. Abutment platform; 6. Movable groove; 7. Movable block; 71. First slide groove; 72. Second slide groove; 8. Elastic member; 9. Lower guide strip; 10. Lower stop block; 11. Side guide strip; 12. Embedded block; 13. Sealing block. DETAILED DESCRIPTION

[0030] 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 of 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.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] See also Figure 1-4 The utility model provides a technical solution: a fastening bolt used for high-speed railway contact network, comprising:

[0033] Stud 1;

[0034] A flat head nut 2, a clamping plane 3 is arranged on the side, a limiting groove 4 is arranged in the center of the clamping plane 3, and a movable groove 6 is extended inwardly from the limiting groove 4;

[0035] The movable block 7 is slidably connected in the limiting groove 4 and the movable groove 6 , and an elastic member 8 is arranged between the inner side of the movable block 7 and the movable groove 6 .

[0036] In view of the fact that the high-speed railway contact network is used in an open outdoor environment with a lot of dust and obvious environmental erosion, this fastening bolt is designed based on a flat head bolt. By threading the bolt into the countersunk hole of the high-speed railway contact network, the contact area between the bolt, the countersunk hole and the outside world is reduced, so as to reduce the external erosion of the bolt and increase the service life. Common flat head bolts use a structure with a cross, flat, hexagonal and other shaped countersunk holes on the top of the nut for easy installation. This structure is filled with external dust and eroded, making it difficult for the corresponding screwdriver to cooperate with the countersunk hole for disassembly and assembly. The present design uses a sideways limiting groove 4 to cooperate with a wrench to tighten the bolt, and the supporting surface of the wrench on the bolt adopts the outer side surface of the movable block 7. When the wrench is inserted into the limiting groove 4, the arc-shaped top surface of the movable block 7 abuts, so that the movable block 7 moves into the movable groove 6, and the reverse elastic force formed by the compression deformation of the elastic member 8 is formed, and the spanner opening is tightened and adjusted to elastically and tightly position the spanner and the movable block 7, so as to avoid the problem that the spanner abuts against the bolt unstably when the spanner is tightened, a deflection angle is generated, and the rotation efficiency of the bolt is reduced. After the tightening bolt is rotated, the spanner can be directly pulled out upward, so that the elastic member 8 drives the movable block 7 to pop out and reset. This design allows the structure of the clamping part of the spanner to change before and after use. Each time it is used, the dust in this part can be dispersed and pushed out, and then the dust is cleaned through daily inspection of the high-speed rail contact network and bolt tightness inspection, so that the problems of filling the hole groove caused by dust accumulation in this part, subsequent bolt disassembly and assembly, and difficulty in inserting, positioning and screwing the spanner are improved.

[0037] The limiting groove 4 extends to the top surface of the flat head nut 2, and the flat head nut 2 is provided with an abutment platform 5 at the bottom of the limiting groove 4 to facilitate the insertion and positioning of the wrench.

[0038] A lower guide bar 9 is arranged on the top surface of the abutment platform 5, and the lower guide bar 9 is arranged to raise the movable block 7, thereby reducing the resistance of the movable block 7 when sliding, making its movement smoother and making it more convenient to insert and remove the wrench.

[0039] A lower stopper 10 for sliding and limiting the movable block 7 in the limiting groove 4 is arranged on the top of the lower guide bar 9 . The lower stopper 10 is slidably connected in the first sliding groove 71 at the bottom of the movable block 7 .

[0040] The top surface of the movable block 7 is an arc-shaped surface whose height increases continuously from the outside to the inside and from the two sides to the center. An arc-shaped stopper for limiting the movable block 7 is arranged on the top of the movable groove 6.

[0041] A side guide bar 11 is provided on the side of the movable groove 6 , and a second sliding groove 72 on the side of the movable block 7 is slidably connected in the side guide bar 11 to ensure the sliding stability of the movable block 7 .

[0042] A stepped embedding block 12 and a truncated cone sealing block 13 are also provided between the stud 1 and the flat head nut 2. The embedding block 12 and the sealing block 13 extend from the top surface of the stud 1 with a continuously increasing cross-section to the bottom surface of the flat head nut 2, further achieving the tightness of the sealing fit between the fastening bolt and the countersunk hole of the high-speed railway contact network, so as to reduce the contact between the above structure and the outside world and improve its service life.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fastening bolt used in a high-speed railway contact network, characterized in that: include: studs; A flat head nut, a clamping plane is arranged on the side, a limiting groove is arranged in the center of the clamping plane, and a movable groove is extended inwardly from the limiting groove; The movable block is slidably connected in the limiting groove and the movable groove, and an elastic member is arranged between the inner side of the movable block and the movable groove.

2. A fastening bolt used for high-speed railway contact network according to claim 1, characterized in that: The limiting groove extends to the top surface of the flat head nut, and the flat head nut is provided with an abutment platform at the bottom of the limiting groove.

3. The fastening bolt used for high-speed railway contact network according to claim 2, characterized in that: A lower guide bar is arranged on the top surface of the abutting platform, and the lower guide bar is arranged to raise the movable block.

4. The fastening bolt used for high-speed railway contact network according to claim 3, characterized in that: A lower stopper is arranged on the top of the lower guide bar for the movable block to slide and limit in the limiting groove, and the lower stopper is slidably connected in the first sliding groove at the bottom of the movable block.

5. The fastening bolt used for high-speed railway contact network according to claim 1, characterized in that: The top surface of the movable block is an arc-shaped surface whose height increases continuously from the outside to the inside and from the two sides to the center. The top of the movable groove is provided with an arc-shaped stopper for limiting the movable block.

6. The fastening bolt used for high-speed railway contact network according to claim 1, characterized in that: A side guide bar is arranged on the side of the movable groove, and a second sliding groove on the side of the movable block is slidably connected in the side guide bar.

7. The fastening bolt used for high-speed railway contact network according to claim 1, characterized in that: A stepped embedding block and a truncated cone sealing block are also arranged between the stud and the flat head nut. The embedding block and the sealing block extend from the top surface of the stud to the bottom surface of the flat head nut with a continuously increasing cross section.

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