Collector shoe structure

Abstract

The utility model discloses a collector shoe structure which comprises a lubricating block and a metal supporting plate installed at the bottom of the lubricating block, the lubricating block is a copper alloy carbon block made of copper alloy powder and graphite in a composite mode, and a tin coating structure is arranged on the connecting portion where the lubricating block and the metal supporting plate are in matched contact. The tin-plated layer structure is heated and welded to form fixed connection, the tin-plated layer is melted when heated by means of the characteristic that metallurgical bonding is formed through low-melting-point melting of tin, liquid tin infiltrates the metal surfaces of the copper alloy carbon block and the metal supporting plate and is solidified after being cooled to form a metallurgical bonding layer, and therefore the copper alloy carbon block and the metal supporting plate are firmly connected. According to the collector shoe adopting the technical scheme, the lubricating block and the supporting plate are tightly combined through a welding process, the mounting stability is good, and the service life and the use performance of the collector shoe are prolonged in cooperation with the wear resistance of the lubricating block and the supporting performance of the metal supporting plate.

Description

Technical Field

[0001] This utility model relates to the field of rail transit power supply technology, specifically to a current collector shoe structure. Background Technology

[0002] The current collector shoe (also known as the third rail current collector) is a key device for urban rail vehicles to dynamically draw current from the rigid power supply rail (third rail). It provides power support to the train through current collection components installed on both sides of the bogie frame. As a critical core component of the train, the material selection and installation of the current collector shoe slide plate directly affect the safety and efficiency of train operation. Currently, the mainstream material for the current collector shoe slide plate is metal-impregnated carbon fiber.

[0003] The existing current collector shoe slide plate mainly consists of a support plate, a carbon-impregnated metal block, and multiple sets of bolt assemblies. The outer edges of the support plate have multiple upward-bent limiting skirts. These limiting skirts are pressed against the four sides of the carbon-impregnated metal block to achieve limiting installation between the support plate and the carbon-impregnated metal block. However, the pressing between the existing support plate and the carbon-impregnated metal block and the limiting skirts is not reliable enough and has poor installation stability. Therefore, it is necessary to improve it. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the pressing between the pallet and the impregnated carbon block close to the limiting skirt in the prior art is not reliable and the installation stability is poor.

[0005] To solve the above-mentioned technical problems, this utility model provides a current collector shoe structure, including a lubricating block made of impregnated carbon metal, a metal support plate installed at the bottom of the lubricating block, and an installation assembly disposed between the lubricating block and the metal support plate. The metal support plate has multiple limiting skirts that are bent and pressed against the side walls of the lubricating block. The connecting part between the lubricating block and the metal support plate is provided with a tin-plated layer structure. The lubricating block and the metal support plate are fixedly connected by heating and welding through the tin-plated layer structure.

[0006] As a preferred embodiment, the lubricating block includes a base portion with a trapezoidal cross-sectional shape, and a metal support plate surrounds the base portion. The base portion and / or the metal support plate are provided with a tin-plated layer structure.

[0007] As a preferred embodiment, the lower bottom surface of the base portion is in contact with the upper surface of the metal tray, and the tin plating structure includes a first tin layer portion disposed on the lower bottom surface of the base portion and the upper surface of the metal tray.

[0008] As a preferred embodiment, the side wall of the base portion is provided with multiple side connecting surfaces that are in contact with multiple limiting skirts, and the tin plating layer structure includes a second tin layer portion disposed on the multiple side connecting surfaces and the multiple limiting skirts.

[0009] As a preferred embodiment, the lubricating block is a copper alloy carbon block with an elongated shape.

[0010] As a preferred embodiment, the lubricating block includes a carbon block body and two de-icing bodies integrally formed at both ends of the carbon block body in an inclined structure.

[0011] As a preferred embodiment, the mounting assembly includes a plurality of mounting bolts mounted on the bottom of the lubrication block and passing through a metal support plate, and a lock nut connected to the mounting bolts, the head of which is mounted on the bottom of the lubrication block by a limiting structure.

[0012] As a preferred embodiment, the limiting structure includes at least one limiting groove disposed at the bottom of the lubricating block and a limiting hole disposed on the metal support plate for the mounting bolt to pass through. The head of the mounting bolt is matched and accommodated in the limiting groove, and the metal support plate limits and presses the head of the mounting bolt against the bottom of the lubricating block when it is fixed.

[0013] As a preferred embodiment, the mounting bolt is a T-bolt, the limiting groove extends along the length of the lubricating block and is provided in a strip-shaped groove at the bottom of the lubricating block, and the head of the mounting bolt is provided with limiting planes on both sides that fit and contact the side walls of the limiting groove.

[0014] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0015] 1. In the current collector shoe structure provided by this utility model, a tin-plated layer structure is provided at the connection part where the lubricating block and the metal support plate make contact. The tin-plated layer structure is heated and welded to form a fixed connection. The function of this tin-plated layer is as an intermediate brazing layer. Taking advantage of the low melting point of tin to form a metallurgical bond, the tin-plated layer melts when heated. The liquid tin wets the metal surface of the copper alloy carbon block and the metal support plate and solidifies after cooling to form a metallurgical bond layer, thereby firmly connecting the two. The current collector shoe using this technical solution keeps the lubricating block and the support plate tightly connected through the welding process, forming a reliable metallurgical connection with good installation stability. Combined with the wear resistance of the lubricating block and the support of the metal support plate, the service life and performance of the current collector shoe are extended.

[0016] 2. In the current collector shoe structure provided by this utility model, the tin plating layer melts when heated to form liquid tin. The liquid tin can adhere tightly to the metal surface of the base and the support plate. Tin has excellent wettability to the copper alloy carbon block and the metal support plate, and good welding can be achieved without complicated pretreatment, which simplifies the welding process. In addition, tin is chemically stable at room temperature. The tin plating layer can isolate the contact surface between the copper alloy carbon block and the support plate from air and water vapor, slow down metal oxidation or electrochemical corrosion, and extend the service life of the current collector shoe. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural schematic diagram of the current collector shoe structure provided for the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the lubricating block of the utility model;

[0020] Figure 3 A cross-sectional structural schematic diagram of the current collector shoe structure provided for the utility model;

[0021] Figure 4 for Figure 3 The diagram shows a partially enlarged view of the structure at position A.

[0022] Figure descriptions: 1. Lubricating block; 11. Carbon block body; 12. De-icing body; 13. Base platform; 14. Side connecting surface; 2. Metal support plate; 21. Limiting skirt; 3. Mounting bolt; 4. Locking nut; 5. Tin-plated layer structure; 6. Limiting groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Example

[0027] This utility model provides, for example Figure 1-4 The illustrated current collector shoe structure includes a lubricating block 1 made of impregnated carbon metal, a metal support plate 2 installed at the bottom of the lubricating block 1, and an installation assembly disposed between the lubricating block 1 and the metal support plate 2. The metal support plate 2 has multiple limiting skirts 21 that are bent and pressed against the side walls of the lubricating block 1. The connecting portion between the lubricating block 1 and the metal support plate 2 is provided with a tin-plated layer structure 5. The lubricating block 1 and the metal support plate 2 are fixedly connected by heating and welding through the tin-plated layer structure 5.

[0028] The above-described implementation method is the core technical solution of this embodiment. The metal support plate 2 is pressed onto the lubricating block 1 by the limiting skirt 21 to achieve positioning connection. Then, the metal support plate 2 and the lubricating block 1 are heated and welded together by the tin-plated layer structure 5 to form a fixed connection. The function of this tin-plated layer is to serve as an intermediate solder layer. Taking advantage of the low melting point of tin to form a metallurgical bond, the tin-plated layer melts when heated. The liquid tin wets the metal surfaces of the metal support plate 2 and the lubricating block 1 and solidifies after cooling to form a metallurgical bond layer, thereby firmly connecting the two. The current collector shoe using this technical solution maintains a tight bond between the lubricating block and the support plate through the welding process, forming a reliable metallurgical connection with good installation stability. Combined with the wear resistance of the lubricating block and the support of the metal support plate, the service life and performance of the current collector shoe are extended.

[0029] In a preferred embodiment, the lubricating block 1 is preferably a copper alloy carbon block made of copper alloy powder and graphite composite, specifically as follows: Figure 2 As shown, the lubricating block 1 includes a base portion 13 with a trapezoidal cross-sectional shape. The metal support plate 2 surrounds the base portion 13. Therefore, a tin-plated layer structure 5 is provided on the base portion 13 and the metal support plate 2. Alternatively, the tin-plated layer structure 5 can be provided on either the base portion 13 or the metal support plate 2, as long as the welding requirements between the metal support plate 2 and the copper alloy carbon block are met. With this technical solution, the copper alloy carbon block and the metal support plate are welded by heating the tin-plated layer. Due to the good wettability of the tin plating layer on copper and the metal support plate, the welding difficulty is reduced, avoiding the possibility of incomplete connection or breakage that may occur when the two are directly welded. When the tin plating layer is heated, it melts to form liquid tin, which wets the metal surfaces of the copper alloy carbon block and the support plate, filling the tiny gaps at the interface between the two. After cooling, it solidifies into a metallurgical bonding layer, thereby reliably bonding the copper alloy carbon block and the metal support plate together, ensuring that they do not fall off or loosen during long-term use, and that the installation is stable and reliable.

[0030] In a preferred embodiment, the lower surface of the base 13 is in close contact with the upper surface of the metal support plate 2. The tin plating structure 5 includes a first tin layer disposed on the lower surface of the base 13 and the upper surface of the metal support plate 2. The copper alloy carbon block and the metal support plate 2 are welded and fixed together through the first tin layer. Additionally, the sidewall of the base 13 is provided with multiple side connecting surfaces 14 that are in close contact with multiple limiting skirts 21. The tin plating structure 5 includes a second tin layer disposed on the multiple side connecting surfaces 14 and the multiple limiting skirts 21. Therefore, the copper alloy carbon block and the metal support plate 2 can also be welded and fixed together through the first tin layer. Clearly, this tin plating structure 5 can have both the first and second tin layers disposed on the copper alloy carbon block and the metal support plate 2, or one of them can be chosen. As can be seen from the above structure, when the tin plating layer is heated, it melts to form liquid tin. The liquid tin can adhere tightly to the metal surfaces of the base 13 and the metal tray 2. Tin has excellent wettability on the copper alloy carbon block and the metal tray, and good welding can be achieved without complicated pretreatment, which simplifies the welding process. In addition, tin is chemically stable at room temperature. The tin plating layer can isolate the contact surface between the copper alloy carbon block and the metal tray from air and moisture, slow down metal oxidation or electrochemical corrosion, and extend the service life of the current collector shoe.

[0031] In this embodiment, reference Figure 1-3 The lubricating block 1 includes a carbon block body 11 and two de-icing bodies 12 integrally formed at both ends of the carbon block body 11 with an inclined structure. Since the carbon block body 11 and the de-icing bodies 12 are made of the same material and processed as a single piece, the risk of stress concentration caused by vibration, friction or temperature changes during long-term use is lower, the overall structure is more stable, and the service life of the lubricating block 1 can be extended. This de-icing body has an inclined surface. When the current collector shoe is in dynamic contact with the third rail, the inclined surface of the de-icing body can effectively remove the ice layer (such as thin ice or snow) on the surface of the third rail through mechanical scraping. At the same time, the solid lubricating material (such as graphite) released when the carbon block body 11 wears will adhere to the surface of the third rail, reducing subsequent frictional resistance. The two functions work together to solve the problem of poor flow in frozen environments and reduce the coefficient of friction.

[0032] To reliably achieve the installation and fixation of the current collector shoe, such as Figure 2-3As shown, the mounting assembly includes multiple mounting bolts 3 installed at the bottom of the lubrication block 1 and passing through the metal support plate 2, and locking nuts 4 connected to the mounting bolts 3. The heads of the mounting bolts 3 are installed at the bottom of the lubrication block 1 through a limiting structure. The current collector shoe is reliably installed at a preset installation position through the cooperation of the mounting bolts 3 and the locking nuts 4. Further preferably, the limiting structure includes two limiting grooves 6 at the bottom of the lubrication block 1 and limiting holes on the metal support plate 2 through which the mounting bolts 3 can pass. The heads of the mounting bolts 3 are matched and accommodated in the limiting grooves 6. When the metal support plate 2 is fixed, it limits and presses the heads of the mounting bolts 3 against the bottom of the lubrication block 1. The limiting design between the metal support plates 2 prevents the mounting bolts 3 from loosening and falling off, thereby avoiding safety hazards such as parts falling off due to bolt detachment. The mounting bolts 3 are T-bolts, and the limiting grooves 6 are... A strip-shaped groove extends along the length of the lubricating block 1 and is provided at the bottom of the lubricating block 1. The head of the mounting bolt 3 is provided with limiting planes on both sides that fit against the side walls of the limiting groove 6. The limiting design of the surface fit restricts the rotational freedom of the mounting bolt 3 after installation. When the current collector shoe vibrates or is subjected to external impact, the mounting bolt will not loosen due to torsional force, ensuring the tightness of the connection. Furthermore, since the mounting bolt will not rotate at will, parameters such as tightening torque and installation angle can be controlled more precisely during the installation process, ensuring the accuracy of the installation position of the copper alloy carbon block.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A current collector shoe structure, comprising a lubricating block (1) made of impregnated metal carbon material, a metal support plate (2) mounted on the bottom of the lubricating block (1), and a mounting assembly disposed between the lubricating block (1) and the metal support plate (2), wherein the metal support plate (2) has a plurality of limiting skirts (21) bent and pressed against the side walls of the lubricating block (1), characterized in that: The lubricating block (1) and the metal tray (2) are connected by a tin-plated layer structure (5), and the lubricating block (1) and the metal tray (2) are fixedly connected by heating and welding through the tin-plated layer structure (5).

2. The shoe structure according to claim 1, characterized in that: The lubricating block (1) includes a base portion (13) with a trapezoidal cross-section, and the metal support plate (2) surrounds the base portion (13). The base portion (13) and / or the metal support plate (2) are provided with a tin-plated layer structure (5).

3. The shoe structure according to claim 2, characterized in that: The bottom surface of the base (13) is in contact with the upper surface of the metal tray (2), and the tin plating structure (5) includes a first tin layer disposed on the bottom surface of the base (13) and the upper surface of the metal tray (2).

4. The shoe structure according to claim 2, characterized in that: The base portion (13) has multiple side connecting surfaces (14) that are in contact with multiple limiting skirts (21), and the tin plating structure (5) includes a second tin layer portion disposed on the multiple side connecting surfaces (14) and the multiple limiting skirts (21).

5. The shoe structure according to any one of claims 1 to 4, characterized in that: The lubricating block (1) is a copper alloy carbon block with a long strip shape.

6. The shoe structure according to claim 5, characterized in that: The lubricating block (1) includes a carbon block body (11) and two de-icing bodies (12) integrally formed at both ends of the carbon block body (11) in an inclined structure.

7. The shoe structure of claim 1, wherein: The mounting assembly includes a plurality of mounting bolts (3) mounted on the bottom of the lubrication block (1) and passing through the metal support plate (2), and a locking nut (4) connected to the mounting bolts (3), the head of the mounting bolts (3) being mounted on the bottom of the lubrication block (1) by a limiting structure.

8. The current collector shoe structure according to claim 7, characterized in that: The limiting structure includes at least one limiting groove (6) provided at the bottom of the lubrication block (1) and a limiting hole provided on the metal support plate (2) for the mounting bolt (3) to pass through. The head of the mounting bolt (3) is matched and accommodated in the limiting groove (6). When the metal support plate (2) is fixed, the head of the mounting bolt (3) is limited and pressed in the limiting groove (6).

9. The shoe structure of claim 8, wherein: The mounting bolt (3) is a T-bolt. The limiting groove (6) extends along the length of the lubricating block (1) and is a strip-shaped groove at the bottom of the lubricating block (1). The head of the mounting bolt (3) is provided with limiting planes on both sides that fit and contact the side walls of the limiting groove (6).

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