CN-224199732-U - Metal backing plate for improving maintainability of fastener

Abstract

The utility model relates to the technical field of rail fasteners, in particular to a metal backing plate for improving maintainability of a fastener, which comprises a metal backing plate with a rectangular structure, wherein a first supporting part and a second supporting part are arranged above the metal backing plate, and a plate bottom groove is arranged below the metal backing plate; meanwhile, the first through holes and the second through holes are symmetrically arranged on the metal backing plate. The novel elastic strip fixing device has the advantages that dust and sand in the through hole can be effectively discharged through the groove at the bottom of the plate, T-shaped bolts can be conveniently detached and iron base plates can be conveniently replaced, the overall maintainability of the fastener is improved, the size of a long round hole of the first through hole is increased by 100% compared with the left and right position adjustment amount of the existing metal base plates, the size of the first supporting portion is optimized, the fact that the elastic strip is broken due to the fact that the inner side of an arc of the first supporting portion is contacted with a middle limb of the elastic strip when the elastic strip is installed is effectively avoided, and the limit boss on the rail bearing surface of the iron base plates is omitted, so that rail breakage risks caused by the fact that the lower base plates of the rail are not installed on site are avoided.

Inventors

• XIAO JUNHENG
• CAI SHISHENG
• ZHANG HUAN
• SUN LINLIN
• Cui Shukun
• WANG YUANSHUO
• MA DENGKE
• LI WEI
• YAN ZIQUAN
• WANG MIN
• LIU CHANGXI
• LI YANSHAN
• LIU BINGTONG
• WANG YAZHOU
• LI ZIRUI

Assignees

• 中国铁道科学研究院集团有限公司铁道建筑研究所
• 北京铁科首钢轨道技术股份有限公司

Dates

Publication Date

20260505

Application Date

20250602

Claims (10)

1. 1. The metal backing plate is characterized by being divided into an upper part and a lower part, wherein the upper part comprises a first supporting part for fixing a spring strip and a second supporting part for stabilizing a track; The metal backing plate is symmetrically provided with a first through hole pair and a second through hole pair which penetrate through the upper portion to the lower portion, the first through hole pair is close to the left end and the right end of the metal backing plate and used for combining a first T-shaped bolt with a sleeve arranged below the metal backing plate through the metal backing plate, the second through hole pair is arranged in the second supporting portion and used for combining and fixing a spring strip with a second T-shaped bolt.
2. 2. The metal gasket of claim 1 wherein the middle portions of the front and rear ends of the metal gasket are provided with extensions in the front and rear directions, respectively.
3. 3. The metal shim plate of claim 1, wherein a periphery of the metal shim plate is provided with a rounded corner configuration.
4. 4. The metal shim plate of claim 1, wherein the first support portions are four and symmetrically disposed at four corners of the metal shim plate.
5. 5. The metal backing plate of claim 4, wherein the upper end surface of the first support portion is in a concave arc shape, and the concave arc can be tightly attached to the rib of the spring strip.
6. 6. The metal shim plate of claim 5, wherein a width of a side of the first support portion distal from a center of the metal shim plate is greater than a width of a side proximal to the center of the metal shim plate.
7. 7. The metal shim plate of claim 6, wherein a top view of the first support portion is a trapezoidal structure.
8. 8. The metal backing plate of claim 1, wherein the second supporting portion is a shoulder structure symmetrically arranged on two sides of the metal backing plate and comprises a first protrusion, a second protrusion and a third protrusion, wherein the first protrusion is symmetrically arranged on the front end and the rear end of the second protrusion and used for being matched with the first supporting portion to fix the elastic strip, the second protrusion is arranged on the upper portion of the third protrusion and used for supporting the elastic strip, one side, close to the center of the metal backing plate, of the second protrusion is a plane and used for providing transverse supporting force for a track, and the second through hole pair is arranged in the center of the third protrusion.
9. 9. The metal shim plate of claim 1, wherein the first pair of through holes are oblong holes having a width at least greater than the first T-bolt.
10. 10. The metal shim plate of claim 1, wherein the metal shim plate near a center of the second support portion is a planar structure.

Description

Metal backing plate for improving maintainability of fastener Technical Field The utility model belongs to the technical field of rail fasteners, and particularly relates to a metal backing plate for improving maintainability of a fastener. Background The existing fastener metal backing plate plum blossom Kong Daduo is designed to open a hole above the metal backing plate, a sealing surface can be formed between the hole and the buffer backing plate, and the hole opening is narrow. Along with line operation, dust and sand can enter the plum blossom hole along the gap of the T-shaped bolt, so that the T-shaped bolt can not be rotated in the hole to be taken out, and the disassembly is difficult. The sand and stone in the hole can be cleaned and the fastener can be detached only by greatly lifting the steel rail to exceed the height of the T-shaped bolt and taking down the whole metal backing plate. The integral lifting height of the steel rail is required to exceed 90mm, so that the operation is difficult, a certain safety risk exists, and the maintainability of the metal backing plate of the fastener is greatly affected. Secondly, the metal backing plate of the existing fastener is designed with a convex retaining shoulder, and an insulating track gauge block is arranged between the retaining shoulder of the metal backing plate and the steel rail, but the metal backing plate does not have a track gauge adjusting function. The metal backing plate anchor bolt hole is set to the slotted hole, uses the flat pad piece to rely on frictional force to fix the metal backing plate. The metal backing plate can be subjected to displacement adjustment in the oblong hole, so that the left and right position adjustment of the steel rail with the length of +/-6 mm can be realized, but the requirements of on-site maintenance cannot be met. The insulation resistance of the conventional fastener is generally about 5k omega, so that the requirement of a track circuit can be met, but in order to meet the requirement of urban track circuits passing through cities, such as urban areas, inter-urban areas and the like for controlling stray current, the insulation performance of the fastener needs to be further increased. Rail transit is one of the props of modern traffic systems in China, and has various important meanings for the economic and social development in China. Therefore, a metal pad capable of solving the above problems is provided, which is a technical problem to be solved by those skilled in the art. Disclosure of utility model The object of the present utility model is to solve at least one of the above-mentioned technical problems. The technical scheme adopted by the utility model is as follows: The embodiment of the utility model provides a metal backing plate for improving maintainability of a fastener, which adopts a rectangular structure with symmetrical design, wherein the metal backing plate is divided into an upper part and a lower part, the upper part comprises a first supporting part for fixing a spring strip and a second supporting part for stabilizing a track, and two plate bottom grooves penetrating through the lower part along the width direction are symmetrically hollowed out in the lower part; The metal backing plate is symmetrically provided with a first through hole pair and a second through hole pair which penetrate through the upper portion to the lower portion, the first through hole pair is close to the left end and the right end of the metal backing plate and used for combining a first T-shaped bolt with a sleeve arranged below the metal backing plate through the metal backing plate, the second through hole pair is arranged in the second supporting portion and used for combining and fixing a spring strip with a second T-shaped bolt. As a further improvement of the utility model, the middle parts of the front end and the rear end of the metal backing plate are respectively provided with an extension part in the front-rear direction. As a further improvement of the utility model, the periphery of the metal backing plate is provided with a rounding structure. As a further improvement of the utility model, the number of the first supporting parts is four, and the first supporting parts are symmetrically arranged at four corners of the metal backing plate. As a further improvement of the utility model, the upper end surface of the first supporting part is in a concave arc shape, and the concave arc can be tightly attached to the rib of the elastic strip. As a further improvement of the present utility model, the first support portion has a larger width on a side away from the center of the metal backing plate than on a side closer to the center of the metal backing plate. As a further improvement of the present utility model, the top view of the first supporting portion is a trapezoid structure. The metal backing plate is characterized in that the second supporting part is a shoulder structure symme