High hanging rail brake device

Abstract

The utility model provides a kind of high suspension magnetic rail brake device, it includes: lifting frame, lifting frame has the suspension cylinder that it can be suspended on the bogie of rail vehicle, lifting frame also has two transverse pull rods;Two parallelly arranged electromagnets, electromagnet is installed between two transverse pull rods;High suspension magnetic rail brake device has brake state and mitigation state, when lifting frame drives electromagnet moves towards the rail of rail vehicle to electromagnet and rail contact, electromagnet and rail attract and generate friction force, to make high suspension magnetic rail brake device enter brake state;When lifting frame drives electromagnet moves away from rail to at least have 40mm-120mm gap between them, to make high suspension magnetic rail brake device enter mitigation state.The utility model can solve the problem that current magnetic rail brake device is easy to knock with rail and affect operation safety in plateau environment and other extreme environments.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle braking technology, and in particular to a high-suspension magnetic rail braking device for rail vehicles. Background Technology

[0002] In the field of rail transit, the braking performance of trains is crucial to ensuring safe train operation. Traditional braking methods, such as friction braking, have some limitations. For example, at high speeds, friction braking generates enormous heat, which can easily lead to overheating of braking components, affecting braking performance and shortening their lifespan. Furthermore, friction braking efficiency may be significantly reduced in adverse weather conditions (such as wetness, ice, and snow). Magnetic track braking is a braking technology that does not rely on wheel-rail adhesion. It offers significant braking effects, effectively shortening braking distance, improving rail adhesion, and enhancing operational safety and efficiency. It is generally used for emergency braking or braking under low adhesion conditions, and features low excitation power, light power supply burden, simple structure, stability, reliability, and low maintenance.

[0003] As described in Chinese utility model patent CN209700684U, entitled "Magnetic Track Braking Device," it is mainly used in urban rail transit. The specific technical solution disclosed is as follows: The magnetic track braking device consists of components such as an electromagnet, a suspension cylinder, a lateral tie rod, and a centering device. In the released state, the magnetic track braking device is suspended on the bogie via the suspension cylinder, 40mm to 60mm from the top surface of the rail, without increasing the unsprung mass of the vehicle. When the train brakes, the suspension cylinder inflates, directly lowering the electromagnet onto the rail. After the electromagnet's excitation coil is energized, the pole shoes attract and generate frictional braking force with the rail.

[0004] However, the above technical solution has the following problems:

[0005] (1) Insufficient extension of the suspension cylinder: The extension of the suspension cylinder is only 60mm, resulting in an initial installation gap of only 40mm to 60mm between the magnetic rail braking device and the top surface of the rail. When the train is under AW3 load, the wheels are fully worn, or new pole shoes are replaced, the electromagnet is prone to collision with the rail, which seriously affects the safety of operation and restricts its application on high-speed trains (≥160km / h).

[0006] (2) The suspension cylinder adopts a single return spring design, which has a major safety hazard: the return spring needs to continuously bear the weight of the device and the vertical vibration impact of the train, and is prone to fatigue fracture under long-term alternating load; once the spring breaks, the braking device will lose support and fall directly to the rail surface, which may cause a serious traffic accident.

[0007] (3) The bottom breathing plug structure of the suspension cylinder has defects under harsh weather conditions: In snowy weather, condensate is easy to freeze at the breathing hole, causing the breathing hole to be completely blocked; when the breathing plug fails, negative pressure is formed inside the cylinder, which reduces the piston extension speed.

[0008] (4) The electromagnet has an insulation withstand voltage of AC 1500V, which can meet the application requirements of the braking system of rail vehicles under normal conditions. However, for high-altitude operation, it cannot meet the AC 2500V withstand voltage requirement at an altitude of 5000m in TB / T 3355-2014 "Technical Conditions for Electrical and Electronic Products of Locomotives and Rolling Stocks in High-Altitude Areas". The insulation withstand voltage level of some components needs to be further improved.

[0009] (5) The coil frame of the electromagnet adopts a slotted structure, and a cover plate is installed in the slot for encapsulation. This design results in limited winding space, and the number of turns that can be wound on the same size coil frame is reduced, thereby reducing the magnetomotive force of the electromagnet and ultimately affecting its electromagnetic attraction and braking performance.

[0010] (6) The centering device mainly consists of a base and a centering pin, which is fixed to the bogie frame by bolts. In the released state, the device needs to adapt to the swaying and vibration conditions of the bogie; when returning from the working position (braking state) to the released position (released state), the centering pin will be subjected to impact loads from the base. This repeated impact can easily lead to fatigue fracture or loosening failure of the fixing bolts. Utility Model Content

[0011] The purpose of this invention is to provide a high-suspension magnetic rail braking device to at least solve one of the above-mentioned technical problems and realize the application of magnetic rail braking devices in extreme environments such as plateau environments.

[0012] The above-mentioned technical objectives of this utility model are mainly achieved through the following technical solutions:

[0013] This utility model provides a high-suspension magnetic rail braking device, which includes:

[0014] The lifting frame has a suspension cylinder that suspends it on the bogie of a rail vehicle, and the lifting frame also has two lateral tie rods;

[0015] Two parallel electromagnets are installed between the two transverse tie rods;

[0016] The high-suspension magnetic rail braking device has a braking state and a release state. When the lifting frame moves the electromagnet toward the rail of the rail vehicle until the electromagnet contacts the rail, the electromagnet attracts the rail and generates friction, so that the high-suspension magnetic rail braking device enters the braking state. When the lifting frame moves the electromagnet away from the rail until there is a gap of at least 40mm-120mm between them, the high-suspension magnetic rail braking device enters the release state.

[0017] In a preferred embodiment of this utility model, the two transverse tie rods are arranged in parallel. Each transverse tie rod includes a tie rod body and end mounting plates provided at both ends of the tie rod body. The two electromagnets and the two transverse tie rods are connected in sequence to form a rectangular brake frame.

[0018] In a preferred embodiment of the present invention, a first mounting area is provided on the upper surface of the end mounting plate;

[0019] The suspension cylinder includes:

[0020] The cylinder body is a hollow cylindrical shape with an open top. The upper cylinder cover is sealed to the upper end of the cylinder body and is connected to the bogie via a cylinder mounting seat.

[0021] A piston is disposed in the cylinder body and can move up and down. A piston rod is connected to the bottom surface of the piston. The lower end of the piston rod extends out of the opening on the bottom of the cylinder body and is connected to a cylinder base. The cylinder base is installed in the first installation area.

[0022] A double-layer return spring is sleeved on the piston rod, with its two ends abutting against the bottom surface of the piston and the upper surface of the bottom of the cylinder, respectively.

[0023] In a preferred embodiment of the present invention, the suspension cylinder further includes a bellows, which is sleeved on the lower end of the piston rod, and both ends of the bellows are respectively sealed to the cylinder base and the lower surface of the cylinder bottom to form a bellows chamber inside the bellows.

[0024] The bottom of the cylinder has multiple air holes that connect the corrugated chamber and the lower end chamber of the piston. The corrugated chamber and the lower end chamber of the piston form a closed air chamber system.

[0025] In a preferred embodiment of this utility model, the electromagnet comprises:

[0026] An excitation coil body includes a coil frame and an excitation coil wound on the coil frame. The coil frame is provided with multiple baffles and is connected to the transverse tie rod.

[0027] A multi-section pole shoe assembly is arranged sequentially along the length of the coil frame and sleeved on the coil frame. A baffle is sandwiched between two adjacent pole shoe assemblies. Each pole shoe assembly includes two pole shoes arranged opposite each other.

[0028] In a preferred embodiment of this utility model, a double layer of insulating paper is laid between the coil frame and the excitation coil, and an insulating layer is cast onto the outside of the excitation coil.

[0029] In a preferred embodiment of the present invention, the electromagnet further includes a coil frame cover plate, which is bent and formed and pressed onto the coil frame, and then sealed and fixed by laser welding.

[0030] In a preferred embodiment of the present invention, the upper ends of the two pole shoes are connected by screws, and a magnetic shielding plate is sandwiched between the lower ends of the two pole shoes.

[0031] In a preferred embodiment of this utility model, the multiple pole shoe assemblies include:

[0032] Multiple intermediate pole piece groups are located in the middle of the coil frame. The upper ends of two pole pieces in each intermediate pole piece group can pass through the through holes in the coil frame to form a ring that can be fitted onto the coil frame.

[0033] Two end pole shoe groups are respectively located at both ends of the coil frame, and the upper ends of the two pole shoes in the end pole shoe groups are separated by a partition in the coil frame.

[0034] In a preferred embodiment of the present invention, a second mounting area is provided on the upper surface of the end mounting plate;

[0035] The high-suspension magnetic rail braking device further includes a centering device, which comprises:

[0036] A tapered mounting base is welded and fixed to the bogie.

[0037] A tapered pin assembly is detachably inserted into the tapered mounting base and fixed to the second mounting area by a nut.

[0038] Compared with the prior art, the technical solution of this utility model has the following features and advantages:

[0039] (1) The piston stroke of the suspension cylinder is greater than 120mm, and the initial installation gap between the magnetic rail brake device and the top surface of the rail is expanded to 40mm to 120mm. When the train is under AW3 load, the wheels are fully worn, or the new pole shoes are replaced, there is still a large gap between the electromagnet and the rail, thereby eliminating the risk of collision between the electromagnet and the rail. It is suitable for high-speed trains of 160km / h and above.

[0040] (2) The suspension cylinder adopts a double-layer reset spring design, with a main spring and an auxiliary spring. The two springs are matched with different stiffness coefficients. The spring material is high-strength spring steel and undergoes a special heat treatment process to ensure a fatigue life of more than 1.5 million cycles, reduce the risk of spring fatigue fracture, and extend the service life.

[0041] (3) The traditional breathing plug design is eliminated at the bottom of the suspension cylinder. 6-8 air holes are evenly distributed around the bottom circumference of the cylinder. A bellows and the lower piston chamber form a closed air chamber. When the suspension cylinder's charging piston rod extends, the volume of the lower piston chamber decreases, and air enters the bellows through the air holes. When the suspension cylinder's exhaust piston rod retracts, the bellows elastically resets, and the internally stored air returns to the lower piston chamber through the air holes, preventing the intrusion of external pollutants. This ensures that the air passage remains unobstructed even in extreme climates, avoids piston movement delay caused by cylinder negative pressure, and improves adaptability to cold and humid environments.

[0042] (4) The excitation coil inside the excitation coil body adopts a multi-layer composite insulation structure design. The inner layer uses two layers of insulating paper to achieve insulation, and the outer layer is cast with modified epoxy resin to form an insulation layer; thereby improving the insulation withstand voltage level of the excitation coil to AC 2500V, which meets the requirements of the plateau at an altitude of 5000m.

[0043] (5) The slotted structure design of the coil frame inside the electromagnet is eliminated. The coil frame cover plate is welded to the top of the coil frame using laser welding encapsulation technology, which optimizes the winding space layout and effectively increases the utilization rate of the winding space. Under the premise of keeping the external dimensions of the electromagnet unchanged, the number of coil turns is increased, thereby significantly improving the magnetic potential and further enhancing the electromagnetic attraction.

[0044] (6) The centering device mainly consists of two parts: a tapered mounting base and a tapered pin assembly. The tapered mounting base is directly fixed to the bogie by welding, while the tapered pin assembly is reliably connected to the end mounting plate on the transverse tie rod by a high-strength nut, ensuring structural rigidity and long-term load-bearing stability, and avoiding bolt fatigue fracture and loose connection problems. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0046] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0047] Figure 1 This is a schematic diagram of the structure of the high-suspension magnetic rail braking device described in this utility model;

[0048] Figure 2 This is a schematic diagram of the structure of the transverse tie rod described in this utility model;

[0049] Figure 3 This is a schematic diagram of the structure of the suspension cylinder described in this utility model;

[0050] Figure 4 This is a schematic diagram of the structure of the electromagnet described in this utility model;

[0051] Figure 5 This is a schematic diagram of the structure of the coil frame described in this utility model;

[0052] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of AA;

[0053] Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure of BB;

[0054] Figure 8 This is a schematic diagram of the welding structure of the coil frame cover plate of this utility model;

[0055] Figure 9 This is a schematic diagram of the centering device described in this utility model.

[0056] Explanation of reference numerals in the attached figures:

[0057] 100. Horizontal tie rod; 101. Tie rod body; 102. End mounting plate; 103. Guide frame; 104. Rib plate; 105. First mounting area; 106. Second mounting area;

[0058] 200. Suspension cylinder; 201. Cylinder body; 202. Upper cylinder head; 203. Piston rod; 204. Leather cup; 205. First guide seal ring; 206. Second guide seal ring; 207. First return spring; 208. Second return spring; 209. O-ring seal; 210. Cylinder mounting seat; 211. Cylinder base; 212. Bellows; 213. Piston;

[0059] 300. Electromagnet; 301. Excitation coil body; 302. Top plate of coil frame; 303. Bottom plate of coil frame; 304. Side plate of coil frame; 305. Baffle; 306. Fixing strip; 307. Junction box; 308. Intermediate pole shoe assembly; 309. First intermediate pole shoe; 310. Second intermediate pole shoe; 311. End pole shoe assembly; 312. First end pole shoe; 313. Second end pole shoe assembly; 314. Screw; 315. Magnetic shielding plate; 316. Partition plate; 317. Power cable; 318. Excitation coil; 319. Coil frame cover plate;

[0060] 400. Alignment device; 401. Conical mounting base; 402. Conical sleeve; 403. Conical pin; 404. O-ring. Detailed Implementation

[0061] To enable those skilled in the art to better understand the technical solutions of this utility model, 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, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0062] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] like Figure 1 As shown, this utility model provides a high-suspension magnetic rail braking device, which includes: a lifting frame, the lifting frame having a suspension cylinder 200 capable of suspending it on the bogie of a rail vehicle, and the lifting frame also having two transverse tie rods 100; two parallel electromagnets 300, the electromagnets 300 being installed between the two transverse tie rods 100; the high-suspension magnetic rail braking device has a braking state and a releasing state. When the lifting frame moves the electromagnets 300 toward the rail of the rail vehicle until the electromagnets 300 contact the rail, the electromagnets 300 attract and generate friction with the rail, so that the high-suspension magnetic rail braking device enters the braking state; when the lifting frame moves the electromagnets 300 away from the rail until there is a gap of at least 40mm-120mm between them, the high-suspension magnetic rail braking device enters the releasing state.

[0065] The high-suspension magnetic rail braking device of this utility model has a suspension cylinder 200 with a large stroke (for example, a suspension cylinder 200 with a piston stroke greater than 120mm can be used), which expands the initial installation gap between the magnetic rail braking device and the top surface of the rail to 40mm to 120mm. Under the train AW3 load, full wheel wear, and replacement of new pole shoes (under very short working conditions), the electromagnet 300 and the rail still have a large safety gap, thereby eliminating the risk of collision between the electromagnet 300 and the rail. It is suitable for high-speed trains of 160km / h and above.

[0066] The following will provide a detailed description of the specific structure of each part of the high-suspension magnetic track braking device described in this utility model, as well as the position and connection relationship between each part.

[0067] like Figure 1 As shown, the high-suspension magnetic rail braking device has a lifting frame for driving the electromagnet 300 to rise and fall. The lifting frame has a frame body and a suspension cylinder 200. The suspension cylinder 200 is located above the frame body, and the electromagnet 300 is installed below the frame body. The frame body can be a self-stabilizing structure (forming a stable truss structure through multiple interlocking connecting rods), or it can be combined with the electromagnet 300 to form a combined stabilizing structure (as described below with a rectangular braking frame). No specific limitation is made here, as long as the frame body has mounting positions for the electromagnet 300 (in this invention, two transverse tie rods 100 form the frame body for mounting the electromagnet 300).

[0068] Along the length of the suspension cylinder 200, the upper end of the suspension cylinder 200 is fixedly connected to the bogie of the rail vehicle, and the lower end of the suspension cylinder 200 is fixedly connected to the frame body. The lifting frame can be lowered and raised by extending and retracting the suspension cylinder 200. To improve the stability of the connection structure between the lifting frame and the bogie, multiple suspension cylinders 200 can be installed between the frame body and the bogie; in this embodiment, such as... Figure 1 As shown, four suspension cylinders 200 are respectively located at the four corners of the rectangle. The number and distribution of the suspension cylinders 200 can be set according to actual needs and installation space, and are not limited here.

[0069] Two parallel electromagnets 300 are fixedly installed on two transverse tie rods 100 of the frame. The vertical distance between the two electromagnets 300 is adapted to the width of the rail of the rail vehicle. The electromagnets 300 can adopt an integral or multi-section structure, which is not specifically limited here. The electromagnets 300 used for magnetic rail braking are relatively mature technologies in this field, and their main structure and working principle will not be described here.

[0070] The specific working process of the high-suspension magnetic rail braking device described in this utility model is as follows:

[0071] Before the train brakes, the piston rod 203 in the suspension cylinder 200 is in the retracted state, and the gap between the electromagnet 300 and the rail can be adjusted to 40mm to 120mm according to the actual conditions and operating scenarios; at this time, the train is in the released state (non-braking state).

[0072] When the train brakes, the suspension cylinder 200 is inflated, the piston rod 203 extends downward, and the electromagnet 300 lowers the frame along with the lifting frame onto the rail. After the excitation coil 318 of the electromagnet 300 is energized, the electromagnet 300 attracts the rail and generates frictional braking force. From the perspective of energy conversion, the kinetic energy of the vehicle is converted into heat energy through the frictional contact between the electromagnet 300 and the rail, and dissipated into the air. At this time, the train will change from a relief state to a braking state.

[0073] When the train needs to release the brakes, the suspension cylinder 200 releases air and the excitation coil 318 of the electromagnet 300 is de-energized. The electromagnet 300 no longer has an attraction with the rail, the piston rod 203 will retract upwards, and the electromagnet 300 will return to its original position along with the lifting frame, separating from the rail and maintaining a gap of 40mm to 120mm with the rail. At this time, the train will return from the braking state to the released state.

[0074] The following will further explain the structure and technical effects of the preferred embodiment of the high-suspension magnetic rail braking device of this utility model.

[0075] According to one embodiment of the present invention, such as Figure 1 As shown, the lifting frame has two parallel horizontal tie rods 100. Each horizontal tie rod 100 includes a tie rod body 101 and end mounting plates 102 located at both ends of the tie rod body 101. Two electromagnets 300 and the two horizontal tie rods 100 are connected in sequence to form a rectangular braking frame.

[0076] Specifically, such as Figure 1 and Figure 2 As shown, two transverse tie rods 100 are arranged parallel and opposite to each other. The two ends of the transverse tie rods 100 are respectively connected to the ends of the two electromagnets 300 located on the same side, so that the position of the transverse tie rods 100 will not affect the overall structure of the bogie. The length of the transverse tie rods 100 is equal to the distance between the two rails of the track on which the rail vehicle travels. The distance between the two electromagnets 300 is limited by the two transverse tie rods 100 to ensure that the distance between the two electromagnets 300 is equal to the distance between the two rails of the track. This allows the two electromagnets 300 to generate the same braking force with the two rails respectively, thereby ensuring the stability of the magnetic rail braking device during braking. Furthermore, the transverse tie rod 100 includes a tie rod body 101 and two end mounting plates 102 connected to both ends of the tie rod body 101. The tie rod body 101 is an upright elongated steel plate, and the end mounting plates 102 are flat steel plates. That is, the setting direction of the tie rod body 101 is perpendicular to the setting direction of the end mounting plates 102, and the two are fixedly connected by welding. Preferably, the two can be integrally processed by casting or other methods.

[0077] Better, such as Figure 2 As shown, in order to improve the stability of the transverse tie rod 100 structure, a plurality of stiffening plates 104 are provided at the connection position between the tie rod body 101 and the end mounting plate 102.

[0078] Better, such as Figure 2 As shown, a guide frame 103 is provided on the transverse tie rod 100. The cross-section of the guide frame 103 is a right-angled groove, and the extension direction of the guide frame 103 is the same as the extension and retraction direction of the suspension cylinder 200. The guide frame 103 is fixedly connected to the tie rod body 101 by welding. Preferably, the two are integrally machined by casting or other methods. The guide frame 103 can contact the bogie of the rail vehicle, thereby guiding the up and down movement of the lifting frame. This ensures that the electromagnet 300 can always correspond to the rail during the up and down movement, thus guaranteeing the stability of the high-suspension magnetic rail braking device during braking.

[0079] According to one embodiment of the present invention, such as Figures 1 to 3As shown, a first mounting area 105 is provided on the upper surface of the end mounting plate 102. The suspension cylinder 200 includes: a cylinder body 201, which is a hollow cylinder with an open upper end, and an upper cylinder cover 202 is sealed to the upper end of the cylinder body 201. The upper cylinder cover 202 is connected to the bogie through a cylinder mounting seat 210; a piston 213, which is movable up and down and is disposed in the cylinder body 201. A piston rod 203 is connected to the bottom surface of the piston 213. The lower end of the piston rod 203 extends out of an opening on the bottom of the cylinder body 201 and is connected to a cylinder base 211. The cylinder base 211 is installed in the first mounting area 105; and a double-layer return spring, which is sleeved on the piston rod 203. The two ends of the double-layer return spring abut against the bottom surface of the piston 213 and the upper surface of the bottom of the cylinder body 201, respectively.

[0080] The suspension cylinder 200 adopts a double-layer return spring design, which improves the fatigue life of the spring, reduces the risk of spring fatigue fracture, and extends its service life.

[0081] Specifically, such as Figure 1 and Figure 3 As shown, the cylinder body 201 has an open top and an open bottom. The piston 213 and piston rod 203 are an integral structure and are movable up and down inside the cylinder body 201. The lower end of the piston rod 203 extends downward from the bottom opening of the cylinder body 201. A double-layer return spring is disposed inside the cylinder body 201 and sleeved on the outside of the piston rod 203. The double-layer return spring includes a first return spring 207 and a second return spring 208 sleeved together. The first return spring 207 and the second return spring 208 are matched with different stiffness coefficients. The spring material is high-strength spring steel, which undergoes a special heat treatment process to ensure a fatigue life of over 1.5 million cycles. A cup 204 and a first guide seal 205 are provided between the piston 213 and the inner surface of the cylinder body 201. A second guide seal 206 is provided between the piston rod 203 and the inner surface of the bottom opening of the cylinder body 201. An upper cylinder cover 202 is provided at the top of the cylinder body 201, and an O-ring seal 209 is provided between the upper cylinder cover 202 and the cylinder body 201. The connection between the suspension cylinder 200 and the bogie is achieved through the cylinder mounting seat 210, which is bolted to the top of the upper cylinder head 202. The top surface of the cylinder mounting seat 210 is aligned with the bogie and secured with bolts. The connection between the suspension cylinder 200 and the frame is achieved through the cylinder base 211, which is threaded to the bottom end of the piston rod 203. The lower end face of the cylinder base 211 is aligned with the first mounting area 105 on the end mounting plate 102 and secured with bolts.

[0082] When the rail vehicle needs to brake, the suspension cylinder 200 begins to inflate, pushing the piston 213 downwards. The movement of piston 213 causes the piston rod 203 to move downwards, compressing the double-layered return spring inside the suspension cylinder 200. The downward movement of piston rod 203 causes the rectangular brake frame to move downwards, causing the electromagnet 300 to move downwards under the action of the suspension cylinder 200. When the electromagnet 300 is energized, it contacts the rail to form a magnetic circuit, attracting the rail and generating braking force through friction. When the rail vehicle resumes operation, the electromagnet 300 is de-energized, and the double-layered return spring of the suspension cylinder 200 overcomes gravity to return to its original position, thereby causing the piston rod 203 to move upwards. The upward movement of piston rod 203 causes the rectangular brake frame to move upwards and separate from the rail.

[0083] According to one embodiment of the present invention, such as Figure 1 and Figure 3 As shown, the suspension cylinder 200 also includes a bellows 212, which is sleeved on the lower end of the piston rod 203. Both ends of the bellows 212 are respectively sealed to the cylinder base 211 and the lower surface of the bottom of the cylinder body 201 to form a bellows chamber inside the bellows 212. The bottom of the cylinder body 201 is provided with multiple air holes (not shown in the figure) that connect the bellows chamber and the lower end chamber of the piston. The bellows chamber and the lower end chamber of the piston form a closed air chamber system.

[0084] The traditional breather plug design at the bottom of the suspension cylinder 200 is eliminated. Instead, 6-8 air holes are evenly distributed around the circumference of the cylinder bottom, forming a closed air chamber with the bellows 212 and the lower chamber of the piston. When the inflation piston rod 203 of the suspension cylinder 200 extends, the volume of the lower chamber of the piston decreases, and air enters the bellows 212 through the air holes. When the exhaust piston rod 203 of the suspension cylinder 200 retracts, the bellows 212 elastically resets, and the internally stored air returns to the lower chamber of the piston 213 through the air holes, preventing the intrusion of external contaminants and ensuring that the air passage remains unobstructed even in extreme climates. This avoids delays in piston 213 action caused by negative pressure in the suspension cylinder 200, improving the adaptability of the braking system in cold and humid environments.

[0085] According to one embodiment of the present invention, such as Figures 4 to 7 As shown, the electromagnet 300 includes: an excitation coil body 301, which includes a coil frame and an excitation coil 318 wound on the coil frame. The coil frame is provided with multiple baffles 305, and the coil frame is connected to the end mounting plate 102; and multiple pole shoe groups, which are arranged sequentially along the length of the coil frame and are movably sleeved on the coil frame. A baffle 305 is sandwiched between two adjacent pole shoe groups, and each pole shoe group includes two pole shoes arranged opposite to each other.

[0086] The high-suspension magnetic rail braking device described in this utility model adopts a multi-section pole shoe. The multi-section pole shoe can ensure the contact area between the pole shoe and the rail. Compared with the integral pole shoe, the processing cycle of the multi-section pole shoe is shortened, greatly reducing manufacturing and maintenance costs, and also reducing the overall weight.

[0087] Specifically, such as Figure 1 and Figure 5 As shown, the coil frame and excitation coil 318 constitute the excitation coil body 301. The coil frame includes a top plate 302 and a bottom plate 303 arranged opposite each other, and side plates 304 connected to both ends of the top and bottom plates. The top plate 302, bottom plate 303, and side plates 304 are fixedly connected by welding. The wires inside the excitation coil 318 are H-class insulated enameled wires, which are evenly and tightly wound on the coil frame using a precision wiring process to ensure uniform winding distribution and stable electromagnetic performance. A fixing strip 306 is welded to the upper end of the coil frame, and a junction box 307 is connected to the fixing strip 306. The excitation coil 318 is connected to the power cable 317 through the junction box 307. The two ends of the coil frame are fixedly mounted on the lower end surface of the end mounting plate 102 at both ends of the transverse tie rod 100 by bolts.

[0088] Multiple baffles 305 are spaced apart on both sides of the coil frame along its length. Multi-section pole shoe groups are arranged sequentially along the length of the coil frame and fitted onto the coil frame. A baffle 305 is sandwiched between two adjacent pole shoe groups. That is, the electromagnet 300 adopts multi-section pole shoes. Multi-section pole shoes can ensure the contact area between the pole shoes and the rail. Compared with integral pole shoes, the processing cycle of multi-section pole shoes is shortened and the manufacturing and maintenance costs are greatly reduced.

[0089] Furthermore, such as Figure 6 and Figure 7 As shown, the two pole shoes in each pole shoe group are connected to each other, thereby covering the coil frame and excitation coil 318. The upper ends of the two pole shoes are connected by screws 314, and a magnetic shielding plate 315 is sandwiched between the lower ends of the two pole shoes. All pole shoes are made of low-carbon steel with precision machining, which has high magnetic permeability and wear resistance. When braking, they contact the rail to form a closed magnetic circuit, and generate braking force through electromagnetic attraction and friction with the rail.

[0090] Furthermore, the multi-section pole piece assembly includes multiple intermediate pole piece assemblies 308 located in the middle of the coil frame and two end pole piece assemblies 311 located at both ends of the coil frame. Since the intermediate pole piece assemblies 308 are located in the middle of the coil frame, and there is an installation gap between the top plate 302 and the bottom plate 303 of the coil frame, the upper ends of the first intermediate pole piece 309 and the second intermediate pole piece 310 within the intermediate pole piece assemblies 308 can pass through through holes formed by the installation gap within the coil frame to form a ring that can be fitted onto the coil frame. Since the end pole piece assemblies 311 are located at the ends of the coil frame, corresponding to the position of the side plate 304 of the coil frame, the upper ends of the first end pole piece 312 and the second end pole piece 313 within the end pole piece assemblies 311 are separated by partitions 316 formed within the side plate 304 of the coil frame.

[0091] According to one embodiment of the present invention, a double layer of insulating paper is laid between the coil frame and the excitation coil 318, and an epoxy resin layer is cast onto the outside of the excitation coil 318 to form an insulating layer.

[0092] The excitation coil 318 inside the excitation coil body 301 adopts a multi-layer composite insulation structure design. The inner layer is insulated with two layers of insulating paper, and the outer layer is insulated with modified epoxy resin to form an epoxy resin insulation layer, thereby improving the insulation withstand voltage level of the excitation coil 318 to AC 2500V, which meets the altitude requirements of 5000m in the plateau region.

[0093] According to one embodiment of the present invention, such as Figure 8 As shown, the electromagnet 300 also includes a coil frame cover plate 319. The coil frame cover plate 319 is made of non-magnetic stainless steel with a thickness of 0.5mm to 3.0mm and is formed by stamping and bending. After bending, the coil frame cover plate 319 is pressed onto the coil frame and is tightly fitted to the top of the coil frame (including the outer edge of the top plate 302, the outer edge of the bottom plate 303, and the outer edge of the side plate 304). Laser welding is used to continuously seal and weld along the contact edge between the cover plate and the coil frame to ensure the overall structure is reliable and the protection level reaches IP67, which can effectively prevent dust and water.

[0094] The slotted structure design of the coil frame inside the electromagnet 300 is eliminated, saving the milling and subsequent deburring processes; the coil frame cover plate 319 is welded to the top of the coil frame, optimizing the winding space layout and effectively increasing the utilization rate of the winding space. While keeping the external dimensions of the electromagnet 300 unchanged, the number of coil turns is increased, thereby significantly improving the magnetomotive force and further enhancing the electromagnetic attraction.

[0095] According to one embodiment of the present invention, such as Figure 1 and Figure 9As shown, a second mounting area 106 is provided on the upper surface of the end mounting plate 102. The high-suspension magnetic rail braking device also includes a centering device 400, which includes: a tapered mounting base 401, which is welded and fixed to the bogie; and a tapered pin assembly, which is detachably inserted into the tapered mounting base 401 and fixed to the second mounting area 106 by a nut.

[0096] The conical mounting base 401 in the centering device of this utility model is fixed to the bogie by welding, ensuring structural rigidity and long-term load-bearing stability, thereby avoiding fatigue fracture and loosening caused by bolt connection.

[0097] Specifically, such as Figure 9 As shown, the centering device 400 mainly consists of two parts: a tapered mounting base 401 and a tapered pin assembly. The upper end face of the tapered mounting base 401 is directly fixed to the bogie by welding, and its lower end face has an upwardly concave tapered insertion hole. The tapered pin assembly has a tapered pin 403, one end of which has a tapered head, and the other end has a threaded connection section. The threaded connection section on the tapered pin 403 can be inserted into an opening in the second mounting area 106 and secured with a high-strength nut. The tapered pin 403 can be separably inserted into the tapered socket. During the operation of the rail vehicle, since the braking mechanism is kept in a high position, the tapered pin 403 remains inserted into the tapered socket, thus preventing the high-suspension magnetic rail braking device from swaying left and right with the bogie. When the rail vehicle brakes, the tapered pin 403 moves down with the transverse tie rod 100, causing the tapered pin 403 to gradually move out of the tapered socket, thus not affecting the downward movement of the electromagnet 300. When the rail vehicle resumes operation and the brake is released, the tapered pin 403 moves up with the transverse tie rod 100, causing the tapered pin 403 to re-insert into the tapered socket, thus preventing the magnetic rail braking device from swaying left and right with the bogie.

[0098] Furthermore, such as Figure 9 As shown, considering that the tapered pin 403 will be repeatedly inserted into the tapered socket during operation, which will cause wear on the tapered pin 403 and make the centering device unable to limit the shaking of the braking device, and replacing the tapered pin 403 is costly and time-consuming, in order to solve the above problems, a tapered sleeve 402 is fitted on the tapered pin 403, and an O-ring 404 is provided between the tapered sleeve 402 and the tapered pin 403. The shape of the tapered sleeve 402 is adapted to the shape of the tapered socket, and when wear occurs, only a new tapered sleeve 402 needs to be replaced.

[0099] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-suspension magnetic track braking device, characterized in that, include: The lifting frame has a suspension cylinder (200) that can suspend it on the bogie of a rail vehicle, and the lifting frame also has two lateral tie rods (100); Two parallel electromagnets (300) are mounted between the two transverse tie rods (100); The high-suspension magnetic rail braking device has a braking state and a release state. When the lifting frame moves the electromagnet (300) toward the rail of the rail vehicle until the electromagnet (300) contacts the rail, the electromagnet (300) attracts the rail and generates friction, so that the high-suspension magnetic rail braking device enters the braking state. When the lifting frame moves the electromagnet (300) away from the rail until there is a gap of at least 40mm-120mm between them, the high-suspension magnetic rail braking device enters the release state.

2. The high-suspension magnetic track braking device according to claim 1, characterized in that, The two horizontal tie rods (100) are arranged in parallel. Each horizontal tie rod (100) includes a tie rod body (101) and end mounting plates (102) at both ends of the tie rod body (101). The two electromagnets (300) and the two horizontal tie rods (100) are connected in sequence to form a rectangular brake frame.

3. The high-suspension magnetic track braking device according to claim 2, characterized in that, The upper surface of the end mounting plate (102) is provided with a first mounting area (105); The suspension cylinder (200) includes: The cylinder body (201) is a hollow cylindrical shape with an open top. The upper end of the cylinder body (201) is sealed with an upper cylinder cover (202). The upper cylinder cover (202) is connected to the bogie through a cylinder mounting seat (210). A piston (213) is disposed inside the cylinder (201) and can move up and down. A piston rod (203) is connected to the bottom surface of the piston (213). The lower end of the piston rod (203) extends out of the opening on the bottom of the cylinder (201) and is connected to a cylinder base (211). The cylinder base (211) is installed in the first installation area (105). A double-layer return spring is sleeved on the piston rod (203), and the two ends of the double-layer return spring abut against the bottom surface of the piston (213) and the upper surface of the bottom of the cylinder (201), respectively.

4. The high-suspension magnetic track braking device according to claim 3, characterized in that, The suspension cylinder (200) also includes a bellows (212), which is sleeved on the lower end of the piston rod (203), and the two ends of the bellows (212) are respectively sealed to the cylinder base (211) and the lower surface of the bottom of the cylinder body (201) to form a bellows chamber inside the bellows (212); The bottom of the cylinder (201) is provided with a plurality of air holes that connect the corrugated chamber and the lower end chamber of the piston. The corrugated chamber and the lower end chamber of the piston form a closed air chamber system.

5. The high-suspension magnetic track braking device according to claim 1, characterized in that, The electromagnet (300) includes: The excitation coil body (301) includes a coil frame and an excitation coil (318) wound on the coil frame. The coil frame is provided with a plurality of baffles (305). The coil frame is connected to the transverse tie rod (100). A multi-section pole shoe assembly is arranged sequentially along the length of the coil frame and sleeved on the coil frame. A baffle (305) is sandwiched between two adjacent pole shoe assemblies. The pole shoe assembly includes two pole shoes arranged opposite each other.

6. The high-suspension magnetic track braking device according to claim 5, characterized in that, A double layer of insulating paper is laid between the coil frame and the excitation coil (318), and an insulating layer is cast on the outside of the excitation coil (318).

7. The high-suspension magnetic track braking device according to claim 5, characterized in that, The electromagnet (300) also includes a coil frame cover plate (319), which is bent and formed and pressed onto the coil frame and sealed and fixed by laser welding process.

8. The high-suspension magnetic track braking device according to claim 5, characterized in that, The upper ends of the two pole shoes are connected by screws (314), and a magnetic shielding plate (315) is sandwiched between the lower ends of the two pole shoes.

9. The high-suspension magnetic track braking device according to claim 5 or 7, characterized in that, The pole shoe assembly described in the multiple sections includes: Multiple intermediate pole piece groups (308) are provided in the middle of the coil frame. The upper ends of two pole pieces in the intermediate pole piece group (308) can pass through the through hole in the coil frame to form a ring that can be fitted onto the coil frame. Two end pole piece groups (311) are respectively located at both ends of the coil frame, and the upper ends of the two pole pieces in the end pole piece group (311) are separated by a partition (316) in the coil frame.

10. The high-suspension magnetic track braking device according to claim 2, characterized in that, The upper surface of the end mounting plate (102) is provided with a second mounting area (106); The high-suspension magnetic rail braking device further includes a centering device (400), which comprises: A tapered mounting base (401) is welded and fixed to the bogie; A tapered pin assembly is detachably inserted into the tapered mounting base (401) and fixed to the second mounting area (106) by a nut.

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