A current collector suitable for rubber-tyred metro current collector shoe lifting and a metro underframe

Abstract

The application discloses a current collector suitable for automatic lifting of rubber-tyred subway current collecting shoes and a subway underframe, and relates to the technical field of rail transit trains. The current collector comprises a base assembly, an electromagnet and a shoe. The base assembly is detachably connected to a subway framework. The electromagnet is fixedly installed on the side of the base assembly away from the base assembly. The shoe is floatingly connected to the base assembly and located on the same side of the electromagnet. A permanent magnet is installed on the side of the shoe close to the electromagnet, and the permanent magnet is arranged correspondingly to the electromagnet. Through the magnetic force action between the electromagnet and the permanent magnet, the automatic lifting control of the shoe is realized by matching the floating connection structure of the shoe. The structure is simplified, manual rope operation is not needed, the operation safety is significantly improved, and the overall structure is compact, so that the current collector is convenient to arrange in the narrow space of a rubber-tyred subway bogie.

Description

Technical Field

[0001] This invention relates to the field of rail transit train technology, and in particular to a current collector and a subway underframe suitable for the lifting and lowering of a rubber-tired subway power receiving slipper. Background Technology

[0002] The current collector is a crucial device for urban rail transit vehicles to obtain current from the third rail (power supply rail). It obtains current by having the current collector's sliding shoe contact the third rail (power supply rail) to supply power to the train. Based on the installation structure of the third rail, it can be divided into upper contact type, lower contact type, and side contact type. Conventional subway vehicles use upper contact and lower contact types. Rubber-tired subway vehicles use guide rails as the third rail, which serves both to guide the bogie and to meet the vehicle's power supply needs. Due to usage and maintenance requirements, to prevent the current collector's sliding shoe from detaching while energized in case of a current collector failure during train operation, current current collectors are currently used to manually pull an insulating rope to release and raise the current collector's sliding shoe. Because this requires operation on the running track, it carries certain risks, and to minimize the pulling force during shoe release, a relatively complex mechanical structure is often required. Furthermore, the limited installation space on the bogie restricts the routing of the current collector's insulating rope, making the selection of placement points difficult.

[0003] Therefore, how to provide a current collector that at least partially solves the above-mentioned drawbacks is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a current collector suitable for the lifting and lowering of the power receiving slipper in rubber-tired subways. It achieves automatic lifting and lowering of the slipper through electromagnetic force, has a simple and compact structure, is easy to install and maintain, and is suitable for space-constrained scenarios such as rubber-tired subway bogies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A current collector suitable for lifting and lowering power receiving slippers in rubber-tired subways includes: The base assembly is detachably connected to the subway structure; An electromagnet is fixedly installed on the side of the base assembly opposite to the base assembly; A sliding shoe is floatingly connected to the base assembly and located on the same side as the electromagnet. A permanent magnet is installed on the side of the sliding shoe closest to the electromagnet, and the permanent magnet is arranged correspondingly to the electromagnet.

[0006] In one possible implementation, the base assembly includes: The mounting plate is detachably connected to one side of the subway frame by bolts; A fixed base plate is disposed on the side of the mounting plate away from the subway frame by insulators at intervals, and the fixed base plate and the mounting plate are parallel to each other, and the electromagnet is installed in the middle of the fixed base plate.

[0007] In one possible implementation, the slipper is connected to the fixed base plate by two compression springs, with the two compression springs located on opposite sides of the electromagnet.

[0008] In one possible implementation, a screw is inserted inside both compression springs. One end of the screw is fixedly connected to the slipper, and the other end is inserted into the fixed base plate and is provided with a limit cover to prevent the screw from detaching from the fixed base plate.

[0009] In one possible implementation, two parallel mounting protrusions are provided at intervals on the side of the slipper closest to the electromagnet, and the two mounting protrusions are parallel to the extending direction of the slipper. The permanent magnet is rotatably mounted between the two mounting protrusions via a rotating shaft.

[0010] In one possible implementation, the permanent magnet has a U-shaped groove on the side near the electromagnet.

[0011] In one possible implementation, the outer shell of the electromagnet is made of insulating material.

[0012] In one possible implementation, an insulating protective cover is also included, which is mounted on the fixed base plate to protect the electromagnet.

[0013] In one possible implementation, a pressure sensor is provided between the slipper and the compression spring, and the pressure sensor is signal-connected to the electromagnet via a controller.

[0014] This article also provides a subway underframe, characterized in that it includes a pair of current collectors as described above for lifting and lowering the power receiving slippers of rubber-tired subways, and the two current collectors are symmetrically installed on both sides of the subway frame.

[0015] Compared with the above-mentioned background technology, the present invention provides a current collector suitable for lifting and lowering a sliding shoe in a rubber-tired subway, comprising: a base assembly, an electromagnet, and a sliding shoe; the base assembly is detachably connected to the subway frame; the electromagnet is fixedly installed on the side of the base assembly away from the base assembly; the sliding shoe is floatingly connected to the base assembly and located on the same side as the electromagnet, and a permanent magnet is installed on the side of the sliding shoe close to the electromagnet, and the permanent magnet is correspondingly arranged with the electromagnet.

[0016] Specifically, the current collector is installed on the side of the subway structure. A forward or reverse current can be passed through the electromagnet to generate an attractive or repulsive force. When the pantograph needs to be lowered, a forward current is passed through the electromagnet, causing it to attract the permanent magnet closer to the subway structure, thus moving the pantograph away from the pantograph. When the pantograph needs to be raised, a reverse current is passed through the electromagnet, changing the force generated by the electromagnet to a repulsive force against the permanent magnet, thus moving the pantograph away from the subway structure and closer to the pantograph. In summary, this invention achieves automatic raising and lowering control of the pantograph through the magnetic interaction between the electromagnet and the permanent magnet, combined with the floating connection structure of the pantograph. The structure is simplified, eliminating the need for manual rope operation, significantly improving operational safety. Furthermore, the overall structure is compact, making it easy to install in confined spaces such as rubber-tired subway bogies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the current collector provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the current collector structure without the insulating protective cover provided in an embodiment of the present invention; Figure 3 for Figure 2 Another perspective structural diagram; Figure 4 This is a schematic diagram of the subway underframe structure provided in an embodiment of the present invention.

[0019] in: 01-Subway structure; 110 - Mounting plate, 120 - Fixed base plate, 130 - Insulator; 200-Electromagnet; 300-Slipper, 310-Permanent magnet, 320-Compression spring, 330-Screw, 340-Mounting cam, 350-Shaft; 400 - Insulating protective cover. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this invention.

[0023] The purpose of this invention is to provide a current collector suitable for the lifting and lowering of the power receiving slipper 300 in rubber-tired subways. The slipper 300 is automatically lifted and lowered by electromagnetic force. The structure is simple and compact, easy to install and maintain, and suitable for scenarios where space is limited in rubber-tired subway bogies.

[0024] To achieve the above objectives, the present invention provides the following technical solution: Please see Figures 1 to 4 This embodiment provides a current collector suitable for lifting and lowering a power receiving slipper in a rubber-tired subway, comprising: a base assembly, an electromagnet 200, and a slipper 300; the base assembly is detachably connected to the subway frame 01; the electromagnet 200 is fixedly installed on the side of the base assembly away from the base assembly; the slipper 300 is floatingly connected to the base assembly and located on the same side as the electromagnet 200, and a permanent magnet 310 is installed on the side of the slipper 300 close to the electromagnet 200, and the permanent magnet 310 is correspondingly arranged with the electromagnet 200.

[0025] In this embodiment, the electromagnet 200 is installed on the outside of the subway frame 01 via a base assembly, and the sliding shoe 300 is also floatingly connected to the outside of the subway frame 01 corresponding to the electromagnet 200. The floating connection can be achieved by an elastic element. A permanent magnet 310 with magnetic properties is provided on the inside of the sliding shoe 300. It can be understood that the electromagnet 200 generates electromagnetic fields when current is applied, and the direction of the magnetic poles will change when the direction of the current is different. Therefore, by utilizing the principle of like poles repelling and unlike poles attracting, an attractive or repulsive force can be generated on the sliding shoe 300.

[0026] Specifically, the current collector is installed on the side of the subway frame 01. A forward or reverse current can be passed through the electromagnet 200 to generate an attractive or repulsive force. When the pantograph needs to be lowered, a forward current is passed through the electromagnet 200, causing it to attract the permanent magnet 310 closer to the subway frame 01, thus moving the pantograph 300 away from the pantograph. When the pantograph needs to be raised, a reverse current is passed through the electromagnet 200, changing the force generated by the electromagnet 200 into a repulsive force against the permanent magnet 310 combined with the elastic force of the spring, thus moving the pantograph 300 away from the subway frame 01 and closer to the rail. In summary, this invention achieves automatic lifting and lowering control of the pantograph 300 through the magnetic interaction between the electromagnet 200 and the permanent magnet 310, combined with the floating connection structure of the pantograph 300. The structure is simplified, eliminating the need for manual rope operation, significantly improving operational safety. Furthermore, the overall structure is compact, facilitating its placement within the confined space of a rubber-tired subway bogie.

[0027] In one possible implementation, the base assembly includes: a mounting plate 110 and a fixing base plate 120; the mounting plate 110 is detachably connected to one side of the subway frame 01 by bolts; the fixing base plate 120 is disposed at intervals on the side of the mounting plate 110 away from the subway frame 01 by insulators 130, and the fixing base plate 120 and the mounting plate 110 are parallel to each other, and an electromagnet 200 is mounted in the middle of the fixing base plate 120.

[0028] Understandably, the contact between the sliding shoe 300 and the pantograph will transmit a large current. Therefore, to prevent this current from being conducted to the subway frame 01, the base assembly is divided into two parts: a mounting plate 110 and a fixed base plate 120. Both are roughly the same in shape and size. The mounting plate 110 can be installed onto the subway frame 01 using several screws, while the fixed base plate 120 is used to install other components, such as the electromagnet 200 and the sliding shoe 300. The mounting plate 110 and the fixed base plate 120 are connected by insulators 130. The insulators 130 are insulators made of insulating material, which prevent the current from the sliding shoe 300 from being transmitted to the mounting plate 110 through the fixed base plate 120, thus ensuring the electrical safety of the subway. In this embodiment, four insulators 130 are provided between the mounting plate 110 and the fixed base plate 120. Their number and distribution can be adjusted according to actual conditions, and are not specifically limited here.

[0029] Furthermore, the detachable connection between the mounting plate 110 and the fixed base plate 120 facilitates the overall installation of the current receiver and subsequent maintenance.

[0030] Furthermore, the slipper 300 is connected to the fixed base plate 120 by two compression springs 320, and the two compression springs 320 are located on both sides of the electromagnet 200.

[0031] Specifically, such as Figure 2 and Figure 3 As shown, a compression spring 320 is connected to each end of the sliding shoe 300. The other end of the compression spring 320 is fixed to the fixed base plate 120. When the sliding shoe 300 lowers, it moves closer to the subway structure 01, thereby compressing the compression spring 320 and accumulating rebound force. When the shoe needs to be raised after lowering, this rebound force will be released, and the sliding shoe 300 will quickly recover. Under the repulsive force of the electromagnet 200, it maintains a certain pressure with the receiving rail, thereby achieving stable power collection. In other words, the symmetrical arrangement of the two compression springs 320 provides uniform and stable elastic support for the sliding shoe 300, ensuring that the sliding shoe 300 maintains a suitable contact pressure with the third rail and improving the stability of current collection.

[0032] Furthermore, each of the two compression springs 320 has a screw 330 inserted inside. One end of the screw 330 is fixedly connected to the slip shoe 300, and the other end is inserted into the fixed base plate 120 and is provided with a limit cover to prevent the screw 330 from detaching from the fixed base plate 120.

[0033] Understandably, the slipper 300 has a certain weight and is connected by a compression spring 320. Therefore, the slipper 300 will inevitably swing up and down during subway operation. In order to maintain the stability of the slipper 300 and prevent it from moving up and down or forward and backward, where forward and backward is the direction of subway movement, a screw 330 is installed inside the compression spring 320.

[0034] Specifically, one end of the screw 330 is fixedly connected to the slide shoe 300 by a thread, and the other end is provided with a limit cover after passing through the fixed base plate 120. The size of the limit cover is larger than the diameter of the hole through which the screw 330 passes on the fixed base plate 120. In this way, the screw 330 not only supports the slide shoe 300, but also guides the movement of the slide shoe 300.

[0035] Of course, the fixed connection method between the screw 330 and the slipper 300 can be adjusted according to the actual situation, and the limit cover at the other end can also be a pin or bolt head structure. No specific limitation is made here.

[0036] Furthermore, since the screw 330 passes through the fixed base plate 120, the range of movement of its end near the fixed base plate 120 is the gap between the fixed base plate 120 and the mounting plate 110. In other words, the gap between the fixed base plate 120 and the mounting plate 110 is the travel range of the slipper 300.

[0037] In addition, the cooperation between the screw 330 and the compression spring 320 can also adjust the initial position of the slipper 300 and the spring preload, that is, adjust the length of the screw 330 and the compression spring 320. This can adapt to different installation gaps and pressure requirements, and improve the adjustability and adaptability of the device.

[0038] In one possible implementation, two parallel mounting protrusions 340 are provided on the side of the slipper 300 near the electromagnet 200, and the two mounting protrusions 340 are parallel to the extending direction of the slipper 300. The permanent magnet 310 is rotatably mounted between the two mounting protrusions 340 via a rotating shaft 350.

[0039] Specifically as 2 and Figure 3 As shown, in order to facilitate the installation of the permanent magnet 310, in this embodiment, two mounting protrusions 340 are provided on the inner side of the slipper 300 at the position corresponding to the electromagnet 200, one above the other. The gap formed between the two mounting protrusions 340 is just enough to install the permanent magnet 310.

[0040] Furthermore, in this embodiment, the permanent magnet 310 is installed via a rotatable connection. Specifically, a vertical through hole is provided on the permanent magnet 310, and corresponding through holes are provided on the two mounting protrusions 340. After the through holes on the permanent magnet 310 correspond to the through holes on the mounting protrusions 340, a rotating shaft 350 is inserted, and limiting structures are provided at both ends of the rotating shaft 350. In this way, the permanent magnet 310 can rotate around the rotating shaft 350. This arrangement is mainly to ensure that when the vehicle is running on a curved track, the slipper 300 fits with the curved surface of the third track. In order to ensure that the electromagnet 200 and the permanent magnet 310 always maintain a positive orientation when they attract each other, the rotating shaft 350 allows the permanent magnet 310 to adjust its angle automatically after being attracted, ensuring that its front face is opposite to the electromagnet 200. In other words, the permanent magnet 310 can be rotatably installed via the rotating shaft 350, so that it can adaptively adjust its angle when the vehicle passes through the curved track, maintain good alignment with the electromagnet 200, and ensure the effectiveness of the magnetic force.

[0041] In one possible implementation, the permanent magnet 310 has a U-shaped groove on the side near the electromagnet 200.

[0042] Understandably, setting the permanent magnet 310 to a U-shaped structure firstly reduces its own weight, thereby reducing the overall weight of the current collector, making it lighter and more durable. Secondly, a U-shaped buckle can be connected to the mounting plate 340, which can be locked in the U-shaped groove to prevent the permanent magnet 310 from falling off. Finally, the U-shaped groove can enhance the magnetic field concentration effect between the permanent magnet 310 and the electromagnet 200, improve the attraction and repulsion forces, and enhance the response speed and reliability of the sliding shoe 300's lifting and lowering.

[0043] In one possible implementation, the outer casing of the electromagnet 200 is made of insulating material.

[0044] Understandably, this design prevents the current transmitted by the slipper 300 from affecting the normal operation of the electromagnet 200, and thus the normal operation of the current collector. In addition, the outer shell made of insulating material can also prevent the electromagnet 200 from leaking current, improve the overall electrical safety of the device, and avoid the risk of short circuit.

[0045] In one possible implementation, an insulating protective cover 400 is also included, which is mounted on the fixed base plate 120 to protect the electromagnet 200.

[0046] Understandably, to prevent environmental factors from reducing the lifespan of the electromagnet 200 and compression spring 320, this embodiment also includes an insulating protective cover 400. This cover can be screwed onto the fixed base plate 120 to shield the electromagnet 200, compression spring 320, screw 330, and other components below it. This design extends the overall lifespan of the current collector. In summary, the insulating protective cover 400 prevents dust, rain, and other external environmental factors from corroding the electromagnet 200, extending its lifespan and further ensuring electrical insulation.

[0047] In one possible implementation, a pressure sensor is provided between the slipper 300 and the compression spring 320, and the pressure sensor is signal-connected to the electromagnet 200 via a controller.

[0048] In another embodiment, the contact pressure between the slipper 300 and the third rail is monitored in real time by a pressure sensor and fed back to the controller. The controller then controls the magnitude of the current supplied to the electromagnet 200, thereby controlling the magnitude of its attractive or repulsive force on the slipper 300, realizing closed-loop automatic adjustment of the pressure of the slipper 300, improving the current collection quality and the level of system intelligence.

[0049] In summary, this invention provides a current collector suitable for lifting and lowering the power receiving slipper in a rubber-tired subway, mainly comprising a base assembly, an electromagnet 200, a slipper 300, and a permanent magnet 310. The base assembly includes a mounting plate 110 and a fixed base plate 120, which are connected at intervals by insulators 130 to ensure electrical isolation. The mounting plate 110 is fixed to the side of the subway frame 01 with screws. The electromagnet 200 is installed in the middle of the fixed base plate 120, and its outer shell is made of insulating material. The sliding shoe 300 is floatingly connected to the fixed base plate 120 via two compression springs 320. A screw 330 passes through the compression springs 320. One end of the screw 330 is fixed to the sliding shoe 300, and the other end passes through the fixed base plate 120 and is provided with a limit cover. Two mounting protrusions 340 are provided on the side of the sliding shoe 300 near the electromagnet 200. The permanent magnet 310 is rotatably mounted between the two mounting protrusions 340 via a rotating shaft 350. The side of the permanent magnet 310 facing the electromagnet 200 is provided with a U-shaped groove. An insulating protective cover 400 is mounted on the fixed base plate 120, covering the electromagnet 200, and providing dustproof, moisture-proof and insulating protection. A pressure sensor can also be provided between the sliding shoe 300 and the compression springs 320. The pressure sensor is connected to a controller. The controller controls the energization state of the electromagnet 200 according to the pressure signal to realize closed-loop regulation of the contact pressure.

[0050] The current collector operates as follows: During normal operation, the slipper 300 maintains stable contact with the third rail under the action of the compression spring 320, achieving current collection. When it is necessary to lower the slipper, current is passed through the electromagnet 200, causing it to generate a magnetic field opposite to that of the permanent magnet 310. The two attract each other, pushing the slipper 300 away from the third rail. When it is necessary to raise the slipper, the current direction is changed, and the electromagnet 200 and the permanent magnet 310 repel each other. The slipper 300, with the assistance of the spring, returns to contact with the third rail. In extreme cases, the power supply is disconnected, and the spring's own elasticity causes the current-collecting slipper to rise and contact the third rail. This invention has a compact structure, flexible control, and is suitable for space-constrained rail transit scenarios such as rubber-tired subways, exhibiting high practicality and safety.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0052] This article also provides a subway underframe, including a pair of current collectors as described above for lifting and lowering the power receiving slippers of rubber-tired subways, and the two current collectors for lifting and lowering the power receiving slippers of rubber-tired subways are symmetrically installed on both sides of the subway frame 01, as detailed below. Figure 4 As shown, the subway underframe possesses all the beneficial effects of the aforementioned current collector.

[0053] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0055] The embodiments provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A current collector suitable for lifting and lowering the power receiving slipper in a rubber-tired subway, characterized in that, include: The base assembly is detachably connected to the subway structure (01). An electromagnet (200) is fixedly installed on the side of the base assembly away from the base assembly; A sliding shoe (300) is floatingly connected to the base assembly and located on the same side as the electromagnet (200). A permanent magnet (310) is installed on the side of the sliding shoe (300) close to the electromagnet (200), and the permanent magnet (310) is correspondingly arranged with the electromagnet (200). The slipper (300) is connected to the base assembly by two compression springs (320), and the two compression springs (320) are respectively located on both sides of the electromagnet (200); Two parallel mounting protrusions (340) are provided on the side of the slipper (300) near the electromagnet (200), and the two mounting protrusions (340) are parallel to the extending direction of the slipper (300). The permanent magnet (310) is rotatably mounted between the two mounting protrusions (340) via a rotating shaft (350). The permanent magnet (310) has a U-shaped groove on the side near the electromagnet (200).

2. The current collector for lifting and lowering the power receiving slipper in a rubber-tired subway as described in claim 1, characterized in that, The base assembly includes: Mounting plate (110) is detachably connected to one side of the subway frame (01) by bolts; A fixed base plate (120) is disposed at intervals on the side of the mounting plate (110) away from the subway frame (01) by insulators (130), and the fixed base plate (120) and the mounting plate (110) are parallel to each other, and the electromagnet (200) is installed in the middle of the fixed base plate (120).

3. The current collector for lifting and lowering the power receiving slipper in a rubber-tired subway as described in claim 2, characterized in that, Both compression springs (320) have screws (330) inside them. One end of the screw (330) is fixedly connected to the slipper (300), and the other end is inserted into the fixed base plate (120) and is provided with a limit cover to prevent the screw (330) from detaching from the fixed base plate (120).

4. The current collector for lifting and lowering the power receiving slipper in a rubber-tired subway as described in claim 1, characterized in that, The outer shell of the electromagnet (200) is made of insulating material.

5. The current collector for lifting and lowering the power receiving slipper in a rubber-tired subway as described in claim 2, characterized in that, It also includes an insulating protective cover (400), which is mounted on the fixed base plate (120) to protect the electromagnet (200).

6. The current collector for lifting and lowering the power receiving slipper in a rubber-tired subway as described in claim 3, characterized in that, A pressure sensor is provided between the slipper (300) and the compression spring (320), and the pressure sensor is signal-connected to the electromagnet (200) through a controller.

7. A subway underframe, characterized in that, It includes a pair of current collectors for lifting and lowering the power receiving slippers of rubber-tired subways as described in any one of claims 1-6, and the two current collectors for lifting and lowering the power receiving slippers of rubber-tired subways are symmetrically installed on both sides of the subway frame (01).

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