Seamless expansion joint for C-shaped rail

Abstract

The utility model discloses a C-shaped rail seamless expansion joint which comprises a C-shaped rail A, a C-shaped rail B, a wedge-shaped sliding block, an inner clamping plate, an outer clamping plate, a copper-aluminum cushion block A, a copper-aluminum cushion block B, a copper flexible connector, a rolling bearing, a copper stranded wire, an M16 bolt and an M12 bolt. According to the seamless expansion joint for the C-shaped rail, in the process of thermal expansion and cold contraction of the C-shaped rail, the two inclined planes of the wedge-shaped sliding block are always in a tight fit state with the inclined planes of the C-shaped rail A and the C-shaped rail B on the two sides, so that the current collection surface of the whole expansion joint is complete and seamless, a current collector can smoothly advance along the current collection surface of the C-shaped rail, and the current collection efficiency is improved. Therefore, the locomotive is continuous in power supply and stable in operation, and operation noise is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway transportation equipment, specifically relating to a seamless expansion joint for C-shaped rails. Background Technology

[0002] The contact rail system is one of the key power supply devices in urban rail transit systems. Currently, the commonly used contact rails are divided into two main categories: I-type rails and C-type rails. The contact rail is generally set on both sides of the train track. The train is equipped with a current collector. During the train operation, the current collector contacts the contact rail surface and slides along the rail surface to realize the process of powering the train.

[0003] A typical contact rail system is divided into several anchor sections, with an expansion joint installed in the middle of each anchor section. Changes in ambient temperature and the heat generated by the current during operation will cause changes in the contact rail temperature, resulting in thermal expansion and contraction of the contact rail. The purpose of the expansion joint is to meet the thermal expansion and contraction requirements of the contact rail, allowing the train current collector to pass smoothly and meeting the train's power supply needs.

[0004] Currently, commonly used contact rail expansion joints consist of two long rails and a short rail positioned between them. A noticeable expansion joint is left between the short rail and the long rails at both ends to accommodate the thermal expansion and contraction of the contact rail. The presence of this expansion joint causes problems such as high noise levels and arcing when the current collector passes through, affecting train operation. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by proposing a seamless expansion joint for C-shaped rails. This expansion joint eliminates gaps on the rail surface during movement, avoiding the risk of the current receiver getting stuck in gaps. This allows the current receiver to slide smoothly on the rail surface, thereby reducing noise during operation and improving passenger comfort.

[0006] The C-shaped rail seamless expansion joint provided by this utility model includes: C-shaped rail A1, C-shaped rail B2 and wedge-shaped slider 3 disposed between the two rails are clamped and fixed by two sets of inner clamping plates 4 and outer clamping plates 5. The inner clamping plates 4 and outer clamping plates 5 are connected by M16 bolts 11. The wedge-shaped slider 3 has two opposite inclined surfaces. The end faces of C-shaped rail A1 and C-shaped rail B2 are parallel to the two inclined surfaces of the wedge-shaped slider 3, respectively. The outer clamping plate 5 on the C-shaped rail A1 side is fixed to copper-aluminum pad B7 and copper flexible connection 8 by M12 bolts 12. The outer clamping plate 5 on the C-shaped rail B2 side is fixed to copper-aluminum pad A6 and copper flexible connection 8 by M12 bolts 12. The wedge-shaped slider 3 is connected to the outer clamping plate 5 on the C-shaped rail A1 side and the outer clamping plate 5 on the C-shaped rail B2 side by copper stranded wire 10.

[0007] The seamless expansion joint of the C-shaped rail has a guide groove formed between the C-shaped rail A1 and the outer clamping plate 5, and between the C-shaped rail B2 and the outer clamping plate 5. The wedge-shaped slider 3 is embedded in the guide groove to ensure that the wedge-shaped slider 3 moves in the specified direction during the movement.

[0008] The C-shaped rail seamless expansion joint has a long groove on the back of the wedge-shaped slider 3 to install a rolling bearing 9. One side of the rolling bearing is connected to the outer clamping plate 5, and the other side is embedded in the long groove on the back of the wedge-shaped slider 3.

[0009] The beneficial effects of this utility model are as follows: During the thermal expansion and contraction of the C-shaped rail, the two inclined surfaces of the wedge-shaped slider 3 and the inclined surfaces of the two C-shaped rails A1 and B2 on both sides are always in close contact, so that the flow receiving surface of the entire expansion joint is complete and seamless, avoiding the risk of the flow receiver getting stuck in the gap when passing through, and enabling the flow receiver to transition smoothly when sliding on the rail surface, thereby reducing noise during operation and improving the comfort of the ride. Attached Figure Description

[0010] Figure 1 This is an isometric view of a C-shaped seamless expansion joint according to the present invention.

[0011] Figure 2 This is a top view of a C-shaped seamless expansion joint according to the present invention.

[0012] Figure 3 This is a side view of a C-shaped seamless expansion joint according to the present invention.

[0013] Figure 4 This is a cross-sectional view of a C-shaped seamless expansion joint according to the present invention.

[0014] Figure 5 This is a view of a wedge-shaped slider for a C-shaped rail seamless expansion joint according to this utility model.

[0015] In the diagram, 1-C-type rail A, 2-C-type rail B, 3-wedge slider, 4-inner clamping plate, 5-outer clamping plate, 6-copper-aluminum pad A, 7-copper-aluminum pad B, 8-copper flexible connection, 9-rolling bearing, 10-copper stranded wire, 11-M16 bolt, 12-M12 bolt. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] according to Figure 1-5The diagram illustrates a seamless expansion joint for C-shaped rails. C-shaped rails A1 and B2, along with a wedge-shaped slider 3 positioned between them, are clamped and fixed by two sets of inner clamping plates 4 and outer clamping plates 5. One inner clamping plate 4 extends into the interior of C-shaped rail A1, and the other inner clamping plate 4 extends into the interior of C-shaped rail B2. The two inner clamping plates 4 are respectively connected to the two outer clamping plates 5 using M16 bolts 11. The wedge-shaped slider 3 has two opposing inclined surfaces. The end faces of C-shaped rails A1 and B2 are parallel to the two inclined surfaces of the wedge-shaped slider 3. A guide groove is formed between C-shaped rail A1 and the outer clamping plate 5, and between C-shaped rail B2 and the outer clamping plate 5, respectively. The wedge-shaped slider 3 is embedded in the guide groove, ensuring that it moves in a specified direction during operation. The outer clamping plate 5 on the C-shaped rail A1 side is secured by M12 bolts 11. 2. The copper-aluminum pad B7 is fixed to the copper flexible connection 8. The outer clamping plate 5 on the side of the C-shaped rail B2 is fixed to the copper-aluminum pad A6 and the copper flexible connection 8 by M12 bolts 12. The wedge-shaped slider 3 is connected to the outer clamping plate 5 on the side of the C-shaped rail A1 and the outer clamping plate 5 on the side of the C-shaped rail B2 by copper stranded wire 10. The back of the wedge-shaped slider 3 has an elongated groove for installing a rolling bearing 9. One side of the rolling bearing is connected to the outer clamping plate 5, and the other side is embedded in the elongated groove on the back of the wedge-shaped slider 3. The addition of the rolling bearing 9 makes the wedge-shaped slider 3 move more smoothly.

[0018] During the movement of the expansion joint, the two inclined surfaces of the wedge slider 3 and the inclined surfaces of the C-shaped rails A1 and B2 on both sides are always in close contact, so that the entire flow receiving surface of the expansion joint is complete and seamless, avoiding the risk of the flow receiver getting stuck in the gap when passing through, and enabling the flow receiver to transition smoothly when sliding on the rail surface, thereby reducing noise during operation and improving the ride comfort.

[0019] The above provides a detailed description of a C-shaped seamless expansion joint for rails provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. These examples are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A seamless expansion joint for C-shaped rails, characterized in that... The C-shaped rail A (1), C-shaped rail B (2), and wedge-shaped slider (3) located between the two rails in the C-shaped rail seamless expansion joint are clamped and fixed by two sets of inner clamping plates (4) and outer clamping plates (5). The inner clamping plates (4) and outer clamping plates (5) are connected by M16 bolts (11). The wedge-shaped slider (3) has two opposite inclined surfaces. The end faces of the C-shaped rail A (1) and C-shaped rail B (2) are respectively connected to the two ends of the wedge-shaped slider (3). The inclined planes are parallel. The outer clamping plate (5) of the C-shaped rail A (1) is fixed with copper-aluminum pad B (7) and copper flexible connection (8) by M12 bolts (12). The outer clamping plate (5) of the C-shaped rail B (2) is fixed with copper-aluminum pad A (6) and copper flexible connection (8) by M12 bolts (12). The wedge slider (3) is connected to the outer clamping plate (5) of the C-shaped rail A (1) and the outer clamping plate (5) of the C-shaped rail B (2) by copper stranded wire (10).

2. The seamless expansion joint for C-shaped rails according to claim 1, characterized in that... A guide groove is formed between C-shaped rail A (1) and outer clamping plate (5), and between C-shaped rail B (2) and outer clamping plate (5). The wedge slider (3) is embedded in the guide groove to ensure that the wedge slider (3) moves in the specified direction during the movement.

3. The seamless expansion joint for C-shaped rails according to claim 2, characterized in that... The back of the wedge-shaped slider (3) has an elongated groove for installing a rolling bearing (9). One side of the rolling bearing is connected to the outer clamping plate (5), and the other side is embedded in the elongated groove on the back of the wedge-shaped slider (3).

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