Opening and closing mechanism, permanent magnet eddy current brake and railway vehicle

Abstract

The application provides an opening and closing mechanism, a permanent magnetic eddy current brake and a railway vehicle. The opening and closing mechanism comprises a connecting component for connecting the opening and closing mechanism with the permanent magnetic eddy current brake; two side baffles respectively located at two sides of a magnetic pole assembly and connected with the connecting component, the two side baffles respectively extend along the length direction of the magnetic pole assembly to shield the magnetic pole assembly on the side; an opening and closing component, the opening and closing component is installed at the bottom of the two side baffles and located below the bottom surface of the magnetic pole assembly, the opening and closing component can be opened or closed to expose or shield the bottom surface of the magnetic pole assembly; a driving component, when the brake state is switched to the relief state, the driving component can drive the opening and closing component to be closed, when the relief state is switched to the brake state, the driving component can drive the opening and closing component to be opened. The opening and closing mechanism can effectively ensure the switching of the brake state and the relief state of the permanent magnetic eddy current brake, has simple structure and high reliability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of rail vehicle braking technology, and particularly relates to an opening and closing mechanism, a permanent magnetic eddy current brake and a rail vehicle. BACKGROUND

[0002] As a brand new non-adhesion braking mode, the eddy current brake has attracted wide attention due to its superior braking performance and non-wear characteristics. The eddy current brake can be divided into electromagnetic eddy current brake and permanent magnetic eddy current brake. Compared with the electromagnetic eddy current brake, the permanent magnetic eddy current brake has two main advantages: no external power supply is needed to generate excitation, which greatly saves the power for braking; no power supply is needed, and there is no risk of brake failure when power is off.

[0003] The linear permanent magnetic eddy current brake is installed on the frame of the bogie of a high-speed train. When the vehicle is in emergency braking, the linear permanent magnetic eddy current brake releases the permanent magnet structure to a certain distance from the rail surface, generates eddy current effect on the rail, and thus generates braking force.

[0004] The electromagnetic eddy current can realize the switching between the braking state and the relief state by energizing and de-energizing the brake. However, due to the self-excitation of the permanent magnet, in the non-braking state, if no corresponding measures are taken, the brake force will still be generated during the vehicle operation, which will affect the vehicle operation.

[0005] When the high-speed train permanent magnetic eddy current brake is in the braking state, the bottom surface of the magnetic pole is at a certain distance from the rail surface, the brake and the rail generate eddy current, and thus generate braking force. When the brake is in the non-working state during the train operation, it needs to be placed at a higher position to adapt to the vertical jolt vibration generated during the train operation. However, such distance is still not enough to block the magnetic force line of the permanent magnet, and the braking force still exists, which cannot effectively realize the switching between the braking state and the relief state. SUMMARY

[0006] In view of the deficiencies in the related art, the present application provides an opening and closing mechanism, a permanent magnetic eddy current brake and a rail vehicle, which can effectively block the magnetic force line of the permanent magnet in the relief state, and ensure the switching between the braking state and the relief state.

[0007] The first aspect of the present application provides an opening and closing mechanism used in a permanent magnetic eddy current brake, wherein the permanent magnetic eddy current brake comprises a magnetic pole assembly capable of generating eddy current effect with a rail, and the opening and closing mechanism comprises:

[0008] A connecting component for connecting the opening and closing mechanism with the permanent magnetic eddy current brake;

[0009] two side plates connected with the connecting part, the two side plates being respectively located at two sides of the magnetic pole assembly and extending along the length direction of the magnetic pole assembly to shield the magnetic pole assembly from the side;

[0010] an opening and closing part installed at the bottom of the two side plates and located below the bottom surface of the magnetic pole assembly, the opening and closing part being openable or closable to expose or shield the bottom surface of the magnetic pole assembly;

[0011] a driving part capable of driving the opening and closing part to perform the opening or closing action, when the permanent magnetic eddy current brake is switched from the braking state to the relief state, the driving part drives the opening and closing part to close to shield the bottom surface of the magnetic pole assembly, when the permanent magnetic eddy current brake is switched from the relief state to the braking state, the driving part drives the opening and closing part to open to expose the bottom surface of the magnetic pole assembly to generate the eddy current effect with the rail to brake.

[0012] In some embodiments of the present application, the opening and closing part comprises two opening and closing plates, one side edge of each of the two opening and closing plates is rotatably connected with the bottom edge of one of the side plates, and the sum of the widths of the two opening and closing plates is equal to the distance between the two side plates.

[0013] When the permanent magnetic eddy current brake is switched from the braking state to the relief state, the two opening and closing plates are rotated around the bottom edges of the side plates and close the bottom space of the two side plates, when the permanent magnetic eddy current brake is switched from the relief state to the braking state, the two opening and closing plates are rotated around the bottom edges of the side plates and open the bottom space of the two side plates.

[0014] In some embodiments of the present application, the driving part comprises:

[0015] a guide plate provided at the end of the opening and closing plate, the plate surface of the guide plate being opposite to the end surface of the magnetic pole assembly, and a guide groove being formed in the guide plate;

[0016] a guide part, one end of the guide part being provided on the end surface of the magnetic pole assembly and being capable of moving with the magnetic pole assembly, and the other end of the guide part being inserted into the guide groove, during the lifting of the magnetic pole assembly, the guide part moves along the guide groove and guides the opening and closing part to close, and during the lowering of the magnetic pole assembly, the guide part moves along the guide groove and guides the opening and closing part to open.

[0017] In some embodiments of the present application, the guide groove comprises a curved groove segment, the shape of the curved groove segment is a curve synthesized by the linear motion of the guide part and the rotational motion of the opening and closing plate, one end of the curved groove segment close to the rotation center of the opening and closing plate is a first end, and one end of the curved groove segment far from the rotation center of the opening and closing plate is a second end.

[0018] In some embodiments of the present application, the guide groove further comprises a first linear groove segment, in the relief state, the first linear groove segment is opened to the first end of the curved groove segment in the vertical direction, and the guide part is located at the middle part of the first linear groove segment.

[0019] In some embodiments of the present application, the guide groove further comprises a second linear groove segment, the second linear groove segment extends through the edge of the guide plate from the second end of the curved groove segment, and the second linear groove segment is perpendicular to the first linear groove segment.

[0020] In some embodiments of the present application, the opening and closing mechanism further comprises an elastic member, one end of the elastic member is connected to the side baffle, and the other end of the elastic member is connected to the opening and closing plate or the guide plate, under the action of the elasticity of the elastic member, the two opening and closing plates have a tendency to keep closed.

[0021] The second aspect of the present application provides a permanent magnet eddy current brake comprising the opening and closing mechanism according to any one of the above.

[0022] In some embodiments of the present application, the permanent magnet eddy current brake further comprises:

[0023] a magnetic pole assembly located between the two side baffles of the opening and closing mechanism;

[0024] a magnetic yoke fixedly arranged on the top surface of the magnetic pole assembly;

[0025] a lifting mechanism comprising:

[0026] an air spring support seat arranged at the top of the two ends of the magnetic yoke, the air spring support seat has a mounting cavity;

[0027] an air spring mounted in the mounting cavity, the top of the air spring is connected to the inner side of the top of the air spring support seat;

[0028] a brake mounting plate for mounting the permanent magnet eddy current brake to a bogie, the brake mounting plate is fixedly arranged on the bottom of the air spring;

[0029]

[0030] ​The opening and closing mechanism is connected to the brake mounting plate through the connecting component.

[0031] The third aspect of the present application provides a rail vehicle, comprising a bogie, wherein the bogie is provided with the permanent magnet eddy current brake according to any one of the above.

[0032] Compared with the prior art, the present application has the advantages and positive effects that:

[0033] (1) The opening and closing mechanism provided by the present application can effectively ensure the switching of the braking state and the relief state of the permanent magnet eddy current brake through the opening and closing actions of the opening and closing component and the vertical movement of the permanent magnet eddy current brake, and has a simple structure and high reliability.

[0034] (2) The opening and closing mechanism provided by the present application designs a driving component, which provides power for the opening and closing mechanism in the vertical movement process of the permanent magnet eddy current brake by means of the structure of the permanent magnet eddy current brake itself, and converts the vertical movement into the opening and closing movement of the opening and closing component through guidance, without the need for an additional separate driving power source, thus having a simple structure, low cost and high reliability.

[0035] (3) The opening and closing mechanism provided by the present application also has a protection function, which can prevent the impact of roadside foreign matters or adsorption caused by magnetic force when the vehicle is running at high speed, and provides convenience for subsequent maintenance.

[0036] (4) The opening and closing mechanism provided by the present application fully considers the vibration state during the driving of the rail vehicle, and through the double action of the guide groove and the elastic member, the influence of vibration on the state of the opening and closing mechanism during the running of the rail vehicle can be prevented, and the opening and closing mechanism is ensured to be in a closed state to block the magnetic lines when the vehicle is driving normally.

[0037] (5) The permanent magnet eddy current brake provided by the present application is provided with an opening and closing mechanism, and the opening and closing actions of the opening and closing mechanism are matched with the lifting movement of the magnetic pole assembly, so that the automatic switching of the braking and relief states can be realized, and the reliability is high and can adapt to the needs of the running of the rail vehicle.

[0038] (6) The rail vehicle provided by the present application can realize the automatic switching of the braking state and the relief state, and effectively prevent the generation of braking force in the relief state, thereby improving the safety of running. BRIEF DESCRIPTION OF DRAWINGS

[0039] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0040] Figure 1 Structure diagram of the closed state of the opening and closing mechanism provided by the present applicationFigure 1 ;

[0041] Figure 2 Structure diagram of the closing state of the opening and closing mechanism provided by the embodiment of the present application Figure 2 ;

[0042] Figure 3 Structure diagram of the opening state of the opening and closing mechanism provided by the embodiment of the present application Figure 1 ;

[0043] Figure 4 Structure diagram of the opening state of the opening and closing mechanism provided by the embodiment of the present application Figure 2 ;

[0044] Figure 5 Structure diagram of the guide plate of the opening and closing mechanism provided by the embodiment of the present application

[0045] Figure 6 Structure diagram of the cooperation state of the opening and closing mechanism and the magnetic pole assembly provided by the embodiment of the present application Figure 1 ;

[0046] Figure 7 Structure diagram of the cooperation state of the opening and closing mechanism and the magnetic pole assembly provided by the embodiment of the present application Figure 2 ;

[0047] Figure 8 End surface diagram of the cooperation state of the opening and closing mechanism and the magnetic pole assembly provided by the embodiment of the present application

[0048] Figure 9 Structure diagram of the initial state of the permanent magnetic eddy current brake provided by the embodiment of the present application

[0049] Figure 10 Structure diagram of the initial state of the permanent magnetic eddy current brake provided by the embodiment of the present application Figure 9 Partial enlarged view of the cooperation state of the hollow air spring and the opening and closing mechanism

[0050] Figure 11 Structure diagram of the braking state of the permanent magnetic eddy current brake provided by the embodiment of the present application

[0051] Figure 12 Structure diagram of the braking state of the permanent magnetic eddy current brake provided by the embodiment of the present application Figure 11 Partial enlarged view of the cooperation state of the hollow air spring and the opening and closing mechanism

[0052] Figure 13 Structure diagram of the relief state of the permanent magnetic eddy current brake provided by the embodiment of the present application

[0053] Figure 14 Structure diagram of the relief state of the permanent magnetic eddy current brake provided by the embodiment of the present application Figure 13 Partial enlarged view of the cooperation state of the hollow air spring and the opening and closing mechanism

[0054] Figure 15 Fig. 2 is a schematic view of a bogie on which a permanent magnet eddy current brake of an embodiment of the present application is installed.

[0055] Fig. 2 is a schematic view of a bogie on which a permanent magnet eddy current brake of an embodiment of the present application is installed.

[0056] 1, opening and closing mechanism; 11, connecting part; 2, side baffle; 3, opening and closing part; 31, opening and closing plate; 4, driving part; 41, guide plate; 42, guide groove; 421, first linear groove section; 422, curved groove section; 423, second linear groove section; 43, guide part; 5, elastic member;

[0057] 10, permanent magnet eddy current brake; 101, magnetic pole assembly; 102, magnetic yoke; 103, air spring support seat; 1031, mounting cavity; 104, air spring; 105, brake mounting plate; 106, connecting rod;

[0058] 20, bogie. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0060] Obviously, the drawings described below are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can be applied to other similar scenarios without creative effort based on the drawings. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacture or production changes based on the technical content disclosed in the present application are only routine technical means, and should not be understood as insufficient disclosure of the present application.

[0061] In the present application, "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0062] In the description of the present application, it needs to be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0063] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.

[0064] The first aspect of the embodiment of the present application provides an opening and closing mechanism for a permanent magnet eddy current brake, which can switch between braking state and relief state, and the permanent magnet eddy current brake comprises a magnetic pole assembly capable of generating eddy current effect with the track.

[0065] As shown in Figures 1-8 , the opening and closing mechanism 1 provided by the embodiment of the present application comprises:

[0066] A connecting component 11 for connecting the opening and closing mechanism 1 with the permanent magnet eddy current brake;

[0067] Two side baffles 2 connected with the connecting component 11, the two side baffles 2 are respectively located on both sides of the magnetic pole assembly 101 and extend along the length direction of the magnetic pole assembly 101 to shield the magnetic pole assembly 101 from the side, see Figures 6-7 ;

[0068] An opening and closing component 3 installed at the bottom of the two side baffles 2 and located below the bottom surface of the magnetic pole assembly 101, the opening and closing component 3 can be opened or closed to expose or shield the bottom surface of the magnetic pole assembly 101;

[0069] A driving component 4 capable of driving the opening and closing component 3 to perform opening or closing action, when the permanent magnet eddy current brake 10 is switched from the braking state to the relief state, the driving component 4 can drive the opening and closing component 3 to close to shield the bottom surface of the magnetic pole assembly 101, when the permanent magnet eddy current brake is switched from the relief state to the braking state, the driving component 4 can drive the opening and closing component 3 to open to expose the bottom surface of the magnetic pole assembly 101 to generate eddy current with the track opposite to it to brake.

[0070] The opening and closing mechanism provided by the embodiment of the present application is installed near the magnetic pole assembly of the permanent magnet eddy current brake and can shield the bottom surface and side surface of the magnetic pole assembly. When switching between the braking state and the relief state, the opening and closing mechanism will simultaneously perform the opening or closing action along with the lifting of the permanent magnet eddy current brake. In the braking state, the opening and closing part is opened while the magnetic pole assembly approaches the track, so that the bottom surface of the magnetic pole assembly is exposed to be opposite to the track to generate the eddy current effect for braking. In the relief state, the opening and closing part is closed while the magnetic pole assembly is lifted and away from the track, so that the bottom surface of the magnetic pole assembly is shielded by the opening and closing part, thereby effectively blocking the magnetic force lines of the permanent magnet. The opening and closing mechanism provided by the embodiment of the present application can effectively ensure the switching between the braking state and the relief state of the permanent magnet eddy current brake, has simple structure and high reliability, and also has the protection function, which can prevent the impact of roadside foreign matters or adsorption caused by the magnetic force when the vehicle runs at high speed, and provides convenience for subsequent maintenance.

[0071] In some embodiments, the opening and closing part 3 includes two opening and closing plates 31, one side edge of each opening and closing plate 31 is rotatably connected with the bottom edge of one side baffle 2 respectively, and the sum of the widths of the two opening and closing plates 31 is equal to the distance between the two side baffles 2, so as to close the bottom of the two side baffles 2. When the permanent magnet eddy current brake is switched from the braking state to the relief state, the two opening and closing plates 31 can rotate around the bottom edges of the side baffles 2 and close the bottom space of the two side baffles 2, as shown in Figure 1 and Figure 2 ; when the permanent magnet eddy current brake is switched from the relief state to the braking state, the two opening and closing plates 31 can rotate around the bottom edges of the side baffles 2 and open the bottom space of the two side baffles 2, as shown in Figure 3 and Figure 4 .

[0072] In some embodiments of the present application, the driving part 4 can select some devices capable of providing driving force, such as motors, air cylinders and the like, as an additional driving part to drive the opening and closing part 3 to perform the opening and closing action.

[0073] In some other embodiments of the present application, a driving part 4 is provided, which can realize the driving of the opening and closing part 3 by means of the movement of the permanent magnet eddy current brake itself without the power provided by the outside. As shown in Figures 1-8 , the driving part 4 includes:

[0074] a guide plate 41, the guide plate 41 is arranged at the end of the opening and closing plate 31, the plate surface of the guide plate 41 is opposite to the end surface of the magnetic pole assembly 101, and a guide groove 42 is formed in the guide plate 41;

[0075] a guide part 43, one end of the guide part 43 is arranged on the end surface of the magnetic pole assembly 101 (as shown in Figure 8)and can move with the magnetic pole assembly 101, the other end of the guide part 43 is inserted into the guide slot 42, during the rising process of the magnetic pole assembly 101, the guide part 43 can move along the guide slot 42 and guide the closing of the opening and closing part 3, during the descending process of the magnetic pole assembly 101, the guide part 43 can move along the guide slot 42 and guide the opening of the opening and closing part 3.

[0076] The driving part provided by the embodiment provides the power of the vertical movement process of the permanent magnet eddy current brake itself to the opening and closing mechanism by means of the structure of the permanent magnet eddy current brake itself, and converts the vertical movement into the opening and closing movement of the opening and closing part through guidance, without the need of additionally configuring a separate driving power source, so that the structure is simple, the cost is low, and the reliability is high.

[0077] In some embodiments, as shown in Figure 5 The guide slot 42 includes a curved groove segment 422, the curved groove segment 422 has a curve shape synthesized by the linear movement of the guide part 43 and the rotational movement of the opening and closing plate 31, so that the guide part 43 drives the rotational movement of the guide plate 41 and the opening and closing plate 31 during the vertical movement process of the self-up braking or self-down relieving process of the magnetic pole assembly 101, to realize the opening and closing actions of the opening and closing mechanism, while avoiding movement interference.

[0078] Specifically, when the linear movement and the rotational movement are both uniform motion, the curve shape of the curved groove segment 422 is:

[0079] f(x)=-4.077*e -9 *x 6 +1.236*e -6 *x 5 -0.0001593*x 4 +0.01122*x 3

[0080] -0.4713*x 2 +11.82*x-119

[0081] For the convenience of subsequent description, one end of the curved groove segment 422 close to the rotation center of the opening and closing plate 31 is defined as the first end, and the other end of the curved groove segment 422 far away from the rotation center of the opening and closing plate 31 is defined as the second end.

[0082] In some embodiments, as shown in Figure 5As shown, the guide slot 42 further comprises a first linear slot segment 421 which is opened to the first end of the curved slot segment 422 in the vertical direction in the released state, and the guide part 43 is located at the middle part of the first linear slot segment 421. The first linear slot segment 421 is consistent with the vertical movement track of the guide part 43, and the guide part 43 is located at the middle part of the first linear slot segment 421, so that the vibration during the operation of the rail vehicle can be prevented from affecting the state of the opening and closing mechanism, and the opening and closing mechanism is ensured to be in the closed state to block the magnetic lines when the vehicle is in normal driving. When the permanent magnet eddy current brake is switched from the released state to the braking state, the guide part 43 first moves linearly downward along the first linear slot segment 421 to the first end of the curved slot segment 422, and then opens the opening and closing part 3 under the guidance of the curved slot segment 422. It can be understood that when the opening and closing part 3 is completely opened (rotated by 90°), the first linear slot segment 421 changes from a vertical slot to a horizontal slot.

[0083] In some embodiments, as Figure 5 shown, the guide slot 42 further comprises a second linear slot segment 423 which extends through the edge of the guide plate 41 from the second end of the curved slot segment 422, and the second linear slot segment 423 is perpendicular to the first linear slot segment 421. The second linear slot segment 423 is provided so that after the opening and closing part 3 is opened, the guide plate 41 and the opening and closing plate 31 are in the open position, and the magnetic pole assembly 101 and the guide part 43 thereon can continue to move downward to the required braking working position.

[0084] In some embodiments, the permanent magnet eddy current brake with the opening and closing mechanism further comprises an elastic member 5, one end of the elastic member 5 is connected to the side baffle 2, and the other end of the elastic member 5 is connected to the opening and closing plate 31 or the guide plate 41, and the two opening and closing plates 31 have a tendency to keep closed under the elastic force of the elastic member 31. It should be noted that, in the braking process, the guide plate 41 and the opening and closing plate 31 rotate under the guidance of the guide portion 43, overcoming the elastic force of the elastic member 5, and when the guide plate 41 and the opening and closing plate 31 are rotated by 90°, the guide plate 41 and the opening and closing plate 31 are completely opened, the magnetic pole assembly 101 and the guide portion 43 continue to move downward along the second linear groove segment 423 until the bottom of the magnetic pole assembly 101 is at a specified distance from the track surface. According to different requirements for the distance between the magnetic pole assembly 101 and the track surface, the downward movement stroke of the magnetic pole assembly 101 is different. When the stroke is short, the guide portion 43 at the end surface of the magnetic pole assembly 101 is still located in the second linear groove segment 423 when the magnetic pole assembly 101 reaches the specified distance, thereby overcoming the elastic force of the elastic member 5 and keeping the guide plate 41 and the opening and closing plate 31 in the opened state. When the stroke is long, the guide portion 43 at the end surface of the magnetic pole assembly 101 may be separated from the guide groove 42 when the magnetic pole assembly 101 reaches the specified distance, and at this time, the guide plate 41 or the opening and closing plate 31 can be in contact with the magnetic pole assembly 101 itself or other components above the magnetic pole assembly 101 to overcome the elastic force of the elastic member 5 and keep the guide plate 41 and the opening and closing plate 31 in the opened state. In this embodiment, the elastic member 5 is optionally a spring.

[0085] In some embodiments, the connecting component 11 is a connecting rod arranged at the top end of the side baffle 2, and the connecting rod can be arranged above the two ends of the side baffle 2 in the manner shown in FIG. 8, and it can be understood that the connecting component 11 can also adopt other forms as long as the connecting function is achieved. Figures 1-4

[0086] In some embodiments, it can be understood that the side baffle 2, the opening and closing plate 31 and the guide plate 41 are all made of non-magnetic conductive material, for example, aluminum alloy, to achieve magnetic shielding.

[0087] The second aspect of the embodiment of the present application provides a permanent magnet eddy current brake, which comprises the opening and closing mechanism according to any one of the preceding aspects.

[0088] In some embodiments, as shown in FIG. 8, the permanent magnet eddy current brake 10 further comprises: Figures 9-14

[0089] a magnetic pole assembly 101, which is located between the two side baffles 2 of the opening and closing mechanism 1;

[0090] a magnetic yoke 102, which is arranged at the top surface of the magnetic pole assembly 101;

[0091] a lifting mechanism, which comprises:

[0092] ​​Air spring support seat 103, air spring support seat 103 is arranged at the top of both ends of the magnetic yoke 102, air spring support seat 103 has a mounting cavity 1031;

[0093] Air spring 104, air spring 104 is installed in the mounting cavity 1031, the top of the air spring 104 is connected with the inside of the top of the air spring support seat 103;

[0094] Brake mounting plate 105, brake mounting plate 105 is used for mounting the permanent magnet eddy current brake to the bogie, and the brake mounting plate 105 is fixedly arranged at the bottom of the air spring 104;

[0095] Wherein, the opening and closing mechanism 1 is connected to the brake mounting plate 105 through the connecting part 11.

[0096] In addition, it can be understood that, as shown in Figure 9 And Figure 11 The above-mentioned permanent magnet eddy current brake includes two permanent magnet eddy current brake modules, each of which includes the above-mentioned components. The two permanent magnet eddy current brake modules are arranged as mirror images and connected by the connecting rod 106 at the end to form a whole.

[0097] The permanent magnet eddy current brake with the opening and closing mechanism provided by the embodiment is mounted to the bogie of the railway vehicle. When the vehicle is in emergency braking, the permanent magnet eddy current brake lowers the magnetic pole assembly to a specified distance from the track surface, and at the same time, the opening and closing mechanism is opened to generate eddy current effect on the track to brake. When the brake is released, the permanent magnet eddy current brake raises the magnetic pole assembly, and at the same time, the opening and closing mechanism is closed to shield the bottom surface of the magnetic pole assembly and cut off the magnetic lines of force to ensure that no braking force is generated. The permanent magnet eddy current brake with the opening and closing mechanism can realize automatic switching between the braking state and the release state, has high reliability, and can adapt to the needs of the operation of the railway vehicle.

[0098] The third aspect of the embodiment of the present application provides a railway vehicle, which includes a bogie 20 (see Figure 15 The bogie 20 is provided with the permanent magnet eddy current brake 10 as described above. The railway vehicle can realize automatic switching between the braking state and the release state, effectively prevents the generation of braking force in the release state, and improves the safety of operation. In addition, the other positive technical effects of the opening and closing mechanism and the permanent magnet eddy current brake in the above-mentioned embodiments are also applicable to the railway vehicle, and will not be described here.

[0099] The switching process between the braking state and the release state of one embodiment of the permanent magnet eddy current brake of the present application will be described below in combination with the drawings:

[0100] 1. Initial state of the permanent magnet eddy current brake

[0101] AsFigure 9 and Figure 10 As shown, when the rail vehicle is running normally, the air spring 104 is kept in an inflated state, and the air spring support 103 is kept in the raised position under the thrust of the air spring 104, thereby ensuring that the magnetic yoke 102 and the magnetic pole assembly 101 are in the raised position and maintain the distance from the track.

[0102] At this time, the guide plate 41 and the opening / closing plate 31 of the opening / closing mechanism 1 are in a closed state under the action of the elastic element 5, which can effectively shield the magnetic lines of force of the magnetic pole assembly 101 acting on the track surface. Since the entire mechanism is supported by the air spring 104, when the vehicle is running, the magnetic yoke 102 and the magnetic pole assembly 101 will inevitably generate vertical vibration. Since the guide part 43 is in the middle position of the first straight groove section 421 at this time, even if the guide part 43 vibrates vertically with the magnetic pole assembly 101, it will not cause the guide plate 41 and the opening / closing plate 31 to open, thus ensuring the normal operation of the rail vehicle.

[0103] 2. Braking is performed using a permanent magnet eddy current brake.

[0104] like Figure 11 and Figure 12 As shown, when the rail vehicle applies the brakes, the air spring 104 exhausts gas, and the air spring support 103 moves downward as the gas in the air spring 104 decreases, causing the magnetic yoke 102 fixed on the lower surface of the air spring support 103 to move downward, which in turn drives the magnetic pole assembly 101 fixed below the magnetic yoke 102 to move downward.

[0105] During the above process, the guide portion 43, fixed to the end of the magnetic pole assembly 101, moves downward along the first straight groove segment 421 until it reaches the first end of the curved groove segment 422 (during which the guide plate 41 does not move); then the guide portion 43 continues to move downward along the curved groove segment 422, at which time the drive guide plate 41 rotates around the bottom edge of the side baffle 2, and the guide plate 41 and the opening and closing plate 31 gradually open. When the guide portion 43 moves to the second end of the curved groove segment 422, the guide plate 41 and the opening and closing plate 31 rotate 90° and fully open, then the magnetic yoke 102, the magnetic pole assembly 101, and the guide portion 43 continue to move downward along the second straight groove segment 423 until the bottom surface of the magnetic pole assembly 101 reaches a specified distance from the track surface, and the permanent magnet eddy current brake generates an eddy current effect with the track, thereby generating braking force.

[0106] 3. The permanent magnet eddy current brake is used for relief.

[0107] like Figure 13 and Figure 14As shown, when the rail vehicle is in the relief mode, the air spring 104 is inflated, and the air spring support seat 103 is lifted upward with the increase of the gas in the air spring 104, thereby driving the magnetic yoke 102 fixed below the air spring support seat 103 to move upward, and further driving the magnetic pole assembly 101 fixed below the magnetic yoke 102 to move upward, so that the magnetic pole assembly 101 is away from the rail plane.

[0108] In the above process, the guide part 43 fixed at the end of the magnetic pole assembly 101 first enters the second linear groove section 423 of the guide plate 41, and then moves upward along the shapes of the second linear groove section 423, the curved groove section 422 and the first linear groove section 421 in turn, thereby driving the guide plate 41 and the opening and closing plate 31 to gradually rotate and close. Under the joint action of the elastic member 5, the guide plate 41 and the opening and closing plate 31 are completely closed (the state at this time is referred to as Figure 9 and Figure 10 ). Due to the increase of the distance between the magnetic pole assembly 101 and the rail plane, the eddy current effect is reduced, and at the same time, the bottom surface of the magnetic pole assembly 101 is shielded to block the magnetic field line effect of the magnetic pole assembly 101 on the rail surface, so that the braking force disappears, and the relief function is realized.

[0109] Finally, it should be noted that: the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0110] The above embodiments are only used to illustrate the technical solutions of the present application but not limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. An opening and closing mechanism for use in a permanent magnet eddy current brake comprising a magnetic pole assembly capable of generating eddy current effects with a rail, characterized in that, The opening and closing mechanism comprises: a connecting component for connecting the opening and closing mechanism with the permanent magnetic eddy current brake; two side baffles connected with the connecting component, which are respectively located on both sides of the magnetic pole assembly and extend along the length direction of the magnetic pole assembly to shield the magnetic pole assembly from the side; an opening and closing component installed at the bottom of the two side baffles and located below the bottom surface of the magnetic pole assembly, which can be opened or closed to expose or shield the bottom surface of the magnetic pole assembly; a driving component for driving the opening and closing component to open or close, which can drive the opening and closing component to close to shield the bottom surface of the magnetic pole assembly when the permanent magnetic eddy current brake is switched from the braking state to the relief state, and can drive the opening and closing component to open to expose the bottom surface of the magnetic pole assembly when the permanent magnetic eddy current brake is switched from the relief state to the braking state, so that the bottom surface of the magnetic pole assembly is opposite to the rail to generate eddy current effect for braking; the opening and closing component comprises two opening and closing plates, one side edge of each of the two opening and closing plates is rotatably connected with the bottom edge of one of the side baffles, and the sum of the widths of the two opening and closing plates is equal to the distance between the two side baffles; when the permanent magnetic eddy current brake is switched from the braking state to the relief state, the two opening and closing plates can rotate around the bottom edges of the side baffles and close the bottom space of the two side baffles, and when the permanent magnetic eddy current brake is switched from the relief state to the braking state, the two opening and closing plates can rotate around the bottom edges of the side baffles and open the bottom space of the two side baffles.

2. The opening and closing mechanism according to claim 1, characterized in that the driving component comprises: a guide plate arranged at the end of the opening and closing plate, the plate surface of the guide plate is opposite to the end surface of the magnetic pole assembly, and a guide groove is formed in the guide plate; a guide part, one end of the guide part is arranged on the end surface of the magnetic pole assembly and can move with the magnetic pole assembly, and the other end of the guide part is inserted into the guide groove, during the lifting process of the magnetic pole assembly, the guide part can move along the guide groove and guide the opening and closing component to close, and during the lowering process of the magnetic pole assembly, the guide part can move along the guide groove and guide the opening and closing component to open.

3. The opening and closing mechanism according to claim 2, characterized in that the guide groove comprises a curved groove segment, the shape of the curved groove segment is a curve synthesized by the linear motion of the guide part and the rotary motion of the opening and closing plate, one end of the curved groove segment close to the rotation center of the opening and closing plate is a first end, and the other end of the curved groove segment away from the rotation center of the opening and closing plate is a second end.

4. The opening and closing mechanism according to claim 3, characterized in that the guide groove further comprises a first linear groove segment, which is formed in the vertical direction to the first end of the curved groove segment in the relief state, and the guide part is located at the middle part of the first linear groove segment.

5. The opening and closing mechanism according to claim 4, characterized in that the guide groove further comprises a second linear groove segment, which extends through the edge of the guide plate from the second end of the curved groove segment, and the second linear groove segment is perpendicular to the first linear groove segment.

6. The opening and closing mechanism according to any one of claims 2 to 5, characterized in that: Further comprising elastic members, one end of the elastic members is connected to the side plates, the other end of the elastic members is connected to the opening-closing plates or the guide plates, under the elastic force of the elastic members, the two opening-closing plates have a tendency to keep closed.

7. A permanent magnet eddy current brake, characterized by The opening-closing mechanism as claimed in any one of claims 1-6.

8. The permanent magnet eddy current brake of claim 7, wherein, Further comprising: A magnetic pole assembly is located between the two side plates of the opening-closing mechanism; A magnetic yoke is arranged on the top surface of the magnetic pole assembly; A lifting mechanism comprises: Air spring support seats are arranged at the top of both ends of the magnetic yoke, the air spring support seats have a mounting cavity; Air springs are installed in the mounting cavities, the top of the air springs is connected to the inside of the top of the air spring support seats; A brake mounting plate is used to install the permanent magnet eddy current brake on the bogie, the brake mounting plate is fixedly arranged on the bottom of the air spring; The opening-closing mechanism is connected to the brake mounting plate through the connecting member.

9. A railway vehicle comprising a bogie, characterized in that The bogie is provided with the permanent magnet eddy current brake as claimed in claim 7 or 8.

Images