High-mounted magnetic track brake

Abstract

This utility model discloses a high-position suspended magnetic rail brake, comprising: a force transmission bracket for transmitting the frictional force of the magnetic rail brake to the bogie; a force transmission bracket connecting part, which is bolted to the force transmission bracket to form a frame structure for bearing the bending force of the magnetic rail brake frame structure; a suspension cylinder for connecting the frame structure of the magnetic rail brake to the car body bogie in an elastic connection; an electromagnet assembly, which is bolted to the force transmission bracket and forms an electromagnetic circuit with the rail to generate attraction force after being energized; an electrical box, which integrates cables and a current-carrying protection component; and centering devices, which are respectively set at the four corners of the magnetic rail brake to absorb the reset impact force and limit displacement. This utility model can be widely used in rail transit vehicles such as subway cars, engineering vehicles, and locomotives, especially in rainy or snowy weather or other low-adhesion conditions, and can significantly improve braking performance and ensure operational safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of subway vehicle braking, specifically relating to a high-mounted suspended magnetic rail brake. Background Technology

[0002] Early subway lines in China were all underground tunnels, and subway vehicles were designed based on these conditions, with little consideration given to the impact of rain and snow on surface-level lines. The braking method used in my country's subway vehicles is primarily adhesion braking; currently, apart from coasting protection, domestic subway vehicle braking systems lack other means to address low adhesion. Under low adhesion conditions caused by rain, snow, or other factors, emergency braking distances are difficult to guarantee. However, employing an auxiliary magnetic rail braking device that does not rely on wheel-rail adhesion can effectively shorten braking distances and improve operational safety.

[0003] The magnetic rail brake proposed in this invention can improve the braking performance of subway vehicles under low adhesion conditions. It also has a mechanical cleaning effect on the rail surface, especially in snowy weather or when the rail surface is contaminated, thus improving wheel-rail adhesion, increasing the adhesion between the wheels and the rail, and reducing the risk of high-speed slippage. Utility Model Content

[0004] The purpose of this invention is to provide a high-position suspended magnetic rail brake to solve the problem of long braking distance under low adhesion conditions caused by rain, snow, and other reasons, as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-position suspended magnetic rail brake, comprising: The force transmission bracket is used to transmit the frictional force of the magnetic track braking to the bogie; The force transmission bracket connection part is connected to the force transmission bracket by bolts to form a frame structure, which is used to bear the bending force of the magnetic track brake frame structure; Suspension cylinders are used to connect the frame structure of the magnetic track brake to the bogie of the car body in an elastic connection. The electromagnet assembly is connected to the force transmission bracket by bolts, and is used to form an electromagnetic circuit with the rail to generate attraction force after being energized. The electrical box integrates cables and current protection components. The centering devices are located at the four corners of the magnetic track brake to absorb the reset impact force and limit displacement.

[0006] Preferably, there are four force transmission supports and two electromagnet assemblies. The two electromagnet assemblies and the two force transmission supports are connected by bolts to form a frame structure.

[0007] Preferably, the suspension cylinder has a built-in piston rod, a return spring for assisting piston rod reset, and a cylinder stroke limiter for limiting piston rod position. Both the upper and lower ends of the suspension cylinder are equipped with spherical bearings capable of bearing the lateral and longitudinal loads of the entire frame structure.

[0008] Preferably, the electromagnet assembly includes an electromagnet body, on which a coil is wound externally and sealed by welding with a stainless steel plate, and a slipper is rigidly connected to the bottom of the electromagnet body by bolts.

[0009] Preferably, the cable consists of positive and negative cables to achieve an electrical connection between the magnetic track brake and the vehicle power supply.

[0010] Preferably, the freewheeling protection component consists of a diode and a varistor connected in parallel.

[0011] Preferably, the centering device includes a conical shaft and a rubber conical sleeve fitted over the conical shaft, the conical shaft being fixed to the force transmission bracket by bolts.

[0012] Compared with the prior art, this utility model provides a high-position suspended magnetic rail brake, which has the following beneficial effects: 1. This utility model adopts a frame structure, which facilitates installation, disassembly and maintenance; 2. The electromagnet structure in this utility model adopts an integral structure and is rigidly connected by bolts, which facilitates processing and assembly; 3. This utility model integrates electrical protection to improve system reliability; 4. The centering device of this utility model effectively absorbs the reset impact and limits displacement; 5. This utility model is applicable to low adhesion conditions, improving braking performance and safety performance. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view schematic diagram of the high-position suspended magnetic rail brake proposed in this utility model; Figure 2 This is a top view of the high-position suspended magnetic rail brake proposed in this utility model. Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 for Figure 2 Schematic diagram of cross-sectional structure in the middle BB direction; Figure 5 This is a schematic cross-sectional view of the electromagnet assembly proposed in this utility model. Figure 6 This is a schematic diagram of the wiring principle of the electrical box proposed in this utility model; Figure 7 This is a cross-sectional structural diagram of the centering device proposed in this utility model; In the diagram: 1. Force transmission bracket; 2. Force transmission bracket connecting part; 3. Suspension cylinder; 31. Joint bearing; 32. Return spring; 33. Cylinder stroke limit; 34. Piston rod; 4. Electromagnet assembly; 41. Electromagnet body; 42. Coil; 43. Slipper; 5. Electrical box; 51. Cable; 52. Freewheeling protection assembly; 6. Alignment device; 61. Rubber cone sleeve; 62. Conical shaft. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a high-position suspended magnetic rail brake, including a force transmission bracket 1, a force transmission bracket connecting part 2, a suspension cylinder 3, an electromagnet assembly 4, and an electrical box 5. Two magnetic rail assemblies 4 are connected by bolts to form a rectangular frame structure via four force transmission brackets 1 and two force transmission bracket connecting parts 2, facilitating installation, disassembly, and maintenance. The suspension cylinder 3 is used to connect the magnetic rail brake to the car body bogie in an elastic connection manner. The electromagnet assembly 4, when energized, forms an electromagnetic circuit with the rail to generate attraction. The electrical box 5 integrates cables 51 and a current-carrying protection component 52, which are encapsulated with polyurethane potting compound to protect the internal electrical nodes from environmental influences. Alignment devices 6 are located at the four corners of the magnetic rail brake to absorb reset impact force and limit displacement.

[0016] Please see Figure 2 The magnetic track brake includes four force transmission brackets 1, two electromagnet assemblies 4, two electrical boxes 5, four centering devices 6, and two force transmission bracket connecting parts 2 that connect the four force transmission brackets 1 by bolts. The electromagnetic attraction generated by the magnetic track brake acts on the bogie through the force transmission brackets 1 to provide non-adhesive braking force to the vehicle. The force transmission brackets 1 are composed of multiple plates welded together, with a simple overall structure, light weight, and easy installation.

[0017] Please see Figure 2 , Figure 3 and Figure 4The suspension cylinder 3 has a built-in piston rod 34, a return spring 32 to assist the piston rod 34 in resetting, and a cylinder stroke limiter 33 to limit the piston rod 34. Both the upper and lower ends of the suspension cylinder 3 are equipped with spherical bearings 31 that can withstand lateral and longitudinal loads, thus avoiding the cylinder from bearing radial loads. The suspension cylinder 3 is equipped with a return spring 32. When the suspension cylinder 3 is vented and the magnetic rail is de-energized, the magnetic rail brake is disengaged from the rail under the action of the elastic force and quickly moves to the return position. The suspension cylinder 3 is designed with a cylinder stroke limiter 33 to prevent the return spring 32 from being over-compressed and damaged.

[0018] Please see Figure 5 The electromagnet assembly 4 includes an electromagnet body 41, with a coil 42 wound around the electromagnet body 41 and sealed by welding with a stainless steel plate to protect the coil 42 from environmental influences and mechanical damage. The bottom of the electromagnet body 41 is rigidly connected to a slipper 43 by bolts. The magnetic field generated by the coil 42 after being energized is transmitted through the electromagnet body 41 to the slipper 43 and finally forms an electromagnetic circuit with the rail to generate attraction.

[0019] Please see Figure 6 Cable 51 consists of positive and negative cables to achieve electrical connection between the magnetic track brake and the vehicle power supply. The freewheeling protection component 52 consists of a diode and a varistor connected in parallel, used for freewheeling and ultra-high voltage protection, such as... Figure 6 In the diagram, V1 represents a varistor, D1 represents a diode, node "M" is connected to the positive terminal of the magnetic track brake cable, and node "N" is connected to the negative terminal of the magnetic track brake cable.

[0020] Please see Figure 7 The centering device 6 includes a conical shaft 62 and a rubber conical sleeve 61 fitted outside the conical shaft 62. The conical shaft 62 is fixed to the force transmission bracket 11 by bolts. Each set of magnetic rail brakes includes four centering devices 6, which are distributed at the four corners of the magnetic rail brake. When the magnetic rail brake is switched from the working position to the balance position, the centering device 6 absorbs the spring return impact force. At the same time, the centering device 6 restricts the lateral and longitudinal displacement of the magnetic rail brake in the balance position to prevent unnecessary collisions between the magnetic rail brake and the bogie in the balance position.

[0021] The working principle and usage process of this utility model: The magnetic track brake proposed in this utility model has two working positions, namely the working position and the balance position; Working position: Suspension cylinder 3 is inflated, pressing down the return spring 32. The piston rod 34 drives the electromagnet assembly 4 to move towards the rail surface (downward). Simultaneously, the excitation coil 42 of the electromagnet assembly 4 is energized, generating electromagnetic attraction. When the distance between the magnetic rail brake and the rail surface is less than a certain gap (approximately 7-9 mm), the electromagnet assembly 4 and the rail surface form a closed magnetic circuit and are attracted under the action of electromagnetic force. The slipper 43 contacts the rail surface, and the electromagnetic force generates a positive pressure on the rail surface, generating a frictional force in the opposite direction of the vehicle's movement. This frictional force is ultimately applied to the vehicle through the force transmission bracket 1. Balance position: When the suspension cylinder 3 exhausts air, the excitation coil 42 of the electromagnet assembly 4 is de-energized and the electromagnetic force disappears. The electromagnet assembly 4 is lifted under the action of the return spring 32 of the suspension cylinder 3. The centering device 6 absorbs the return elastic impact and restricts lateral and longitudinal movement, finally bringing the magnetic track brake to the balance position.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-position suspended magnetic rail brake, characterized in that, include: Force transmission bracket (1) is used to transmit the frictional force of the magnetic track braking to the bogie; The force transmission bracket connecting part (2) is connected to the force transmission bracket (1) by bolts to form a frame structure, which is used to bear the bending force of the magnetic track brake frame structure; Suspension cylinder (3) is used to connect the frame structure of the magnetic track brake to the bogie of the car body in an elastic connection manner; The electromagnet assembly (4) is connected to the force transmission bracket (1) by bolts and is used to form an electromagnetic circuit with the rail to generate attraction force after being energized; Electrical box (5) integrates cables (51) and current protection components (52); The centering device (6) is set at the four corners of the magnetic track brake to absorb the reset impact force and limit the displacement.

2. The high-position suspended magnetic rail brake according to claim 1, characterized in that: There are four force transmission brackets (1) and two electromagnet assemblies (4). The two electromagnet assemblies (4) and the two force transmission bracket connecting parts (2) are connected to the four force transmission brackets (11) by bolts to form a frame structure.

3. The high-position suspended magnetic rail brake according to claim 1, characterized in that: The suspension cylinder (3) has a built-in piston rod (34), a reset spring (32) to assist the piston rod (34) in resetting, and a cylinder stroke limiter (33) to limit the piston rod (34). Both the upper and lower ends of the suspension cylinder (3) are provided with joint bearings (31) capable of bearing lateral and longitudinal loads.

4. The high-position suspended magnetic rail brake according to claim 2, characterized in that: The electromagnet assembly (4) includes an electromagnet body (41), on which a coil (42) is wound and sealed by welding with a stainless steel plate, and a slip shoe (43) is rigidly connected to the bottom of the electromagnet body (41) by bolts.

5. The high-position suspended magnetic rail brake according to claim 1, characterized in that: The cable (51) consists of positive and negative cables to achieve an electrical connection between the magnetic track brake and the vehicle power supply.

6. The high-position suspended magnetic rail brake according to claim 1, characterized in that: The freewheeling protection component (52) is composed of a diode and a varistor connected in parallel.

7. The high-position suspended magnetic rail brake according to claim 2, characterized in that: The centering device (6) includes a conical shaft (62) and a rubber conical sleeve (61) fitted outside the conical shaft (62). The conical shaft (62) is fixed to the force transmission bracket (1) by bolts.

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