Patent Description:
The present application relates to the technical field of rail vehicles, and in particular to a bogie comprising a magnet track braking device and a framework.

A bogie includes a cross beam, a longitudinal beam and a magnet track braking device. In the conventional technology, a blocking structure is arranged on a side beam to provide braking force for the magnet track braking device. The blocking structure extends laterally along the side beam, a torque is easy to be produced when the blocking structure blocks the magnet track braking device, and the strength requirement for the blocking structure is relatively high. At the same time, a positioning structure is required to be arranged to limit the movement of the magnet track braking device in the height direction, so as to prevent the magnet track braking device from shifting, and the overall structure is relatively complicated.

Therefore, how to simplify the overall structure of the bogie and ensure the blocking and the limit of the magnet track braking device are technical problems to be solved by those skilled in the art.

<CIT> shows the operation unit has at least one operation element to move a brake mounted on the vehicle bogie between braked and rest positions. The operation unit has an operation cylinder on each side of the bogie and a spring unit with two springs. The spring unit holds the brake at a given minimum distance to the upper edge of the rail in the rest position. Centering devices hold the brake in the rest position without play. An Independent claim is included for a method to move a railway vehicle brake from a rest to a braked position.

<CIT> shows a framework and a tramcar bogie. The framework comprises longitudinal beams and cross beams, the two longitudinal beams are arranged at the left ends and the right ends of the two cross beams, and the ends of the two longitudinal beams extend out relative to the front cross beam and the rear cross beam. The middle part of the longitudinal beam is recessed downwards relative to the front end and the rear end to form a recessed part; and the top surface of the recessed part of the longitudinal beam and the top surface of the cross beam are integrally positioned on the same plane. The bogie can effectively improve tramcar small curve passing capacity and system damping performance.

<CIT> shows a light rail vehicle bogie, comprising a frame. The frame comprises side beams and cross beams, the middle of the side beam is sunken, the top of the cross beam is provided with a swing bolster, the cross beam consists of two pipe bodies, and two ends of each pipe body are both provided with a connecting base, and the two ends of the pipe bodies are fixedly connected to the side beams by means of the connecting bases; cantilever bases extending towards the inner side are provided on two shaft boxes of the light rail vehicle bogie, and a magnetic rail brake located directly below the pipe bodies is mounted in a hoisted manner on the two cantilever bases; the top of the magnetic rail brake is provided with a vertical guide rod, one side of each connecting base is mounted with limiting bases directly above two ends of the magnetic rail brake, and a guide hole for the insertion of the vertical guide rod is formed in the limiting base. The bogie implements low-level traction of the light rail vehicle and the cross beam space is optimized.

The object of the present application is to provide a bogie, which simplifies the overall structure of the bogie and ensure the blocking and the limit of the magnet track braking device.

The problem is solved by a bogie according to claim <NUM>.

The bogie includes a framework and a magnet track braking device. The framework includes a frame structure enclosed by two cross beams and two side beams, lower end faces of two side ends of each of the two cross beams are respectively fixedly provided with limiting seats, and the limiting seat includes a blocking part and a positioning part; the blocking part is configured to abut against and cooperate with an abutting part arranged on the magnet track braking device, and a blocking direction of the blocking part arranged on one of the two cross beams is opposite to a blocking direction of the blocking part arranged on the other of the two cross beams; the positioning part is configured to cooperate with a matching part arranged on the magnet track braking device, and the magnet track braking device is caused to move relative to the framework along a height direction. The limiting seat is further provided with a connection part, the blocking part and the positioning part are fixed to the connection part, the connection part is provided with an arc-shaped connection surface that fits with an outer wall of the cross beam, and the arc-shaped connection surface is attached to the outer wall of the cross beam and is fixed to the outer wall of the cross beam by welding. When the magnet track braking device is not working, a drive member of the magnet track braking device is secured to the framework, and at the same time, the limiting seat can limit the magnet track braking device, thereby ensuring the stability of the magnet track braking device and the framework and avoiding shaking. At this point, the lower part of the magnet track braking device does not contact a rail surface, there is no friction between the magnet track braking device and the rail surface, and no braking force is generated. When the magnet track braking device is working, the drive member drives the magnet track braking device to move downward until the lower part of the magnet track braking device contacts the rail surface, and suction is generated between the magnet track braking device and the rail surface. When there is a relative movement between the magnet track braking device and the rail surface, the friction is generated between the two, and the friction is transmitted from the limiting seat to the cross beam of the framework through the action of the abutting part and the blocking part, so as to realize the braking effect.

The positioning part can cooperate with the matching part of the magnet track braking device, so that the magnet track braking device can move in the height direction relative to the framework, and the relative position between the magnet track braking device and the framework can still be guaranteed after many times of movement, so as to avoid the shift of the magnet track braking device.

That is to say, the limiting seat is integrated with the blocking part and the positioning part, the blocking part can act with the abutting part of the magnet track braking device and provide braking force, and the positioning part can ensure that the magnet track braking device can only move in the height direction relative to the framework, so as to position the magnet track braking device. The limiting seat also plays the roles of blocking and positioning, thus simplifying the overall structure of the bogie and making the overall structure compact. Moreover, the limiting seat is fixed to the cross beam. Since the structures of the components below the cross beam is relatively regular, it is convenient for welding and other fixing operations when the limiting seat is arranged below the cross beam. At the same time, when the limiting seat integrated with blocking and positioning functions is fixed to the cross beam, the stress situation can be simplified, and the overall structure can be simplified and the cost can be reduced while meeting the same strength requirements.

Optionally, a limiting step is formed between the positioning part and the blocking part, and the magnet track braking device is configured to move upward along the height direction until the magnet track braking device abuts against a step surface of the limiting step.

Optionally, a wear-resistant part is further arranged between the blocking part and the abutting part.

Optionally, the limiting seat is a forging, an outer wall of the blocking part is further machined with a mounting surface, and the wear-resistant part is fixed to the mounting surface through a fastener.

Optionally, one of the positioning part and the matching part is provided with a positioning shaft, the other of the positioning part and the matching part is provided with a positioning hole fitting with the positioning shaft, an axis of the positioning shaft is arranged along the height direction, and the positioning shaft and the positioning hole is configured to move relatively along the height direction.

Optionally, an end of the positioning shaft is provided with a conical surface, and/or the positioning hole is a conical hole, and a large-diameter section of the conical hole faces a side of the positioning shaft.

Optionally, the framework further includes a hanging seat, the hanging seat includes a rectangular hanging frame, and a side frame of a side of the rectangular hanging frame forms a mounting beam, an end of the mounting beam extends outward and passes through the side beam and is fixed to the side beam, a side frame of a side of the rectangular hanging frame opposite to the mounting beam is provided with a hanging connector, and the hanging connector is configured to fix to a drive member of the magnet track braking device.

Optionally, an upper cover plate of the side beam is provided with an extension section, and the extension section is attached and fixed to an upper end face of the mounting beam.

Optionally, the framework further includes a shaft-disk brake hanging seat fixedly arranged on the cross beam, and the shaft-disk brake hanging seat is fixed to the cross beam by tube-plate welding.

Optionally, a lower end face of the cross beam is further provided with a double traction rod seat.

Optionally, a wheelbase of the framework is less than <NUM>.

Optionally, the drive member is fixed to the framework.

In <FIG>, reference signs are explained as follows:.

In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and the embodiments.

A framework of a bogie and the bogie are provided according to the embodiments of the present application. The bogie includes a magnet track braking device <NUM> and a framework. The magnet track braking device <NUM> is also provided with a drive member <NUM>, and the drive member <NUM> is fixed to the frame. Specifically, as shown in <FIG>, the framework includes a rectangular frame enclosed by two cross beams <NUM> and two side beams <NUM>, and lower end faces of two side ends of each cross beam <NUM> are respectively fixedly provided with limiting seats <NUM>. In a particular embodiment, in a case that the number of cross beams <NUM> is three or four, the two cross beams <NUM> located at both ends of the framework in the longitudinal direction (along a length direction of the side beam <NUM>) are provided with the limiting seats <NUM>. Moreover, the limiting seats <NUM> are not strictly arranged at the end of the cross beam <NUM>. Specifically, as shown in <FIG>, the end of the cross beam <NUM> is fixed to the side beam <NUM>, a limiting seat <NUM> is arranged on a side of the cross beam <NUM> near the end, and the specific position is arranged according to the actual situation.

As shown in <FIG>, the limiting seat <NUM> includes a blocking part <NUM> and a positioning part <NUM>. The magnet track braking device <NUM> is provided with an abutting part <NUM> and a matching part <NUM>. Specifically, two ends of the magnet track braking device <NUM> are each provided with the abutting part <NUM>. The blocking part <NUM> can abut against and cooperate with the abutting part <NUM>. The two cross beams <NUM> are provided with limiting seats <NUM>, and the blocking direction of the blocking part <NUM> arranged on one of the two cross beams <NUM> is opposite to the blocking direction of the blocking part <NUM> arranged on the other of the two cross beams <NUM>. That is, the blocking parts <NUM> arranged on the two cross beams <NUM> can act on the magnet track braking device <NUM> from two sides in the longitudinal direction to ensure the stability between the magnet track braking device <NUM> and the framework, and can provide braking force to the magnet track braking device <NUM>.

When the magnet track braking device <NUM> is not working, the drive member <NUM> of the magnet track braking device <NUM> is fixed with the framework, and the limiting seat <NUM> can limit the magnet track braking device <NUM> at the same time, thereby ensuring the stability of the magnet track braking device <NUM> and the framework and avoiding shaking. At this time, the lower part of the magnet track braking device <NUM> does not contact a rail surface, there is no friction between the magnet track braking device <NUM> and the rail surface, and no braking force is generated. When the magnet track braking device <NUM> is working, the drive member <NUM> drives the magnet track braking device <NUM> to move downward until the lower part of the magnet track braking device <NUM> contacts the rail surface, suction is generated between the magnet track braking device <NUM> and the rail surface. When there is a relative movement between the magnetic track braking device <NUM> and the rail surface, friction is generated between the magnetic track braking device <NUM> and the rail surface, the friction is transmitted from the limiting seat <NUM> to the cross beam <NUM> of the framework through the action of the abutting part <NUM> and the blocking part <NUM>, thus realizing the braking effect. Specifically, the drive member <NUM> may be an air cylinder, a hydraulic cylinder or a combination of a motor and a screw rod, etc., so as to drive the magnet track braking device <NUM> up and down, which is not specifically limited herein.

The positioning part <NUM> can cooperate with the matching part <NUM> of the magnet track braking device <NUM>, so that the magnet track braking device <NUM> can move relative to the framework in the height direction. The relative position between the magnet track braking device <NUM> and the framework can still be guaranteed after many times of movements, so as to avoid the shift of the magnet track braking device <NUM>.

That is to say, in the embodiment, the stop seat <NUM> is integrated with the blocking part <NUM> and the positioning part <NUM>, the blocking part <NUM> can act on the abutting part <NUM> of the magnet track braking device <NUM> and provide braking force, and the positioning part <NUM> can ensure that the magnet track braking device <NUM> can only move relative to the frame in the height direction, so as to position the magnet track braking device <NUM>. The limiting seat <NUM> also plays the roles of blocking and positioning, thereby simplifying the overall structure of the bogie and making the overall structure compact. Moreover, the limiting seat <NUM> is fixed to the cross beam <NUM>. Since the structures of the components below the cross beam <NUM> are relatively regular, the arrangement of the limiting seat <NUM> below the cross beam <NUM> facilitates welding and other fixing operations. At the same time, when the limiting seat <NUM> integrated with blocking and positioning functions is fixed to the cross beam <NUM>, the stress situation can be simplified, and the overall structure can be simplified and the cost can be reduced while meeting the same strength requirements.

In the embodiment, a limiting step <NUM> is also formed between the positioning part <NUM> and the blocking part <NUM>. When braking is not required, the magnet track braking device <NUM> can move upward along the height direction under the action of the drive member <NUM> until the magnet track braking device <NUM> contacts a step surface of the limiting step <NUM>. The limiting step <NUM> can limit the rise of the magnet track braking device <NUM> without additional limit structure, which simplifies the overall structure. Specifically, as shown in <FIG>, the blocking part <NUM> and the positioning part <NUM> enclose to form an L-shaped structure, the positioning part <NUM> is arranged at the top of the blocking part <NUM>, and the upper end face in the bend of the L-shaped structure forms the limiting step <NUM>. The structure is relatively simple.

In the embodiment, a wear-resistant part <NUM> is also arranged between the blocking part <NUM> and the abutting part <NUM>. Friction is generated between the abutting part <NUM> and the blocking part <NUM> during the movement of the magnet track braking device <NUM> along the height direction under the action of the drive member <NUM>. When the magnet track braking device <NUM> is working, the abutting part <NUM> abuts against the blocking part <NUM> and a force is generated. Therefore, when the wear-resistant part <NUM> is arranged between the blocking part <NUM> and the abutting part <NUM>, the action between the blocking part <NUM> and the abutting part <NUM> can be ensured, rigid collision and friction between the blocking part <NUM> and the abutting part <NUM> can be avoided. Noise generation is also avoided and service life is improved while wear is reduced. Specifically, there are no requirements for the material of the wear-resistant part <NUM>, for example, the wear-resistant part <NUM> may be a nylon block or the like.

Further, the limiting seat <NUM> is a forging to ensure structural strength, and the outer wall of the blocking part <NUM> is also machined with a mounting surface <NUM>. The wear-resistant part <NUM> is fixed to the mounting surface <NUM> through a fastener <NUM>. The arrangement of the mounting surface <NUM> can ensure the stable installation of the wear-resistant part <NUM>, and can also ensure surface contact between the blocking part <NUM> and the abutting part <NUM>, so as to avoid abrasion of the abutting part <NUM> due to uneven force caused by the uneven surface of the blocking part <NUM>, and to facilitate the installation operation at the same time. Alternatively, in the embodiment, the wear-resistant part <NUM> may be fixedly arranged on the abutting part <NUM>, which is not specifically limited herein.

In the embodiment, as shown in <FIG>, the limiting seat <NUM> is further provided with a connection part <NUM>, and the blocking part <NUM> and the positioning part <NUM> are fixed to the connection part <NUM>. The outer wall of the cross beam <NUM> is a cylindrical structure, and the connection part <NUM> is provided with an arc-shaped connection surface <NUM> fitting with the outer wall of the cross beam <NUM>. The arc-shaped connection surface <NUM> can be attached to the outer wall of the cross beam <NUM> and is fixed to the outer wall of the cross beam <NUM> by welding. Such arrangement can increase the connection area between the limiting seat <NUM> and the cross beam <NUM>, and the limiting seat <NUM> and the cross beam <NUM> are fixed by welding. The arrangement of the arc-shaped connection surface <NUM> can enhance the strength of the welding connection, avoid damage to the welding seam due to high stress during the braking process, and ensure the connection strength and the stability of the connection between the limiting seat <NUM> and the cross beam <NUM>. Specifically, as shown in <FIG>, a reinforcing rib <NUM> is arranged between the connection part <NUM> and the blocking part <NUM> to ensure the strength of the overall structure of the limiting seat <NUM> and meet the requirement for braking force.

In the embodiment, one of the positioning part <NUM> and the matching part <NUM> is provided with a positioning shaft, and the other of the positioning part <NUM> and the matching part <NUM> is provided with a positioning hole. The positioning shaft fits with the positioning hole, and the positioning shaft can move relative to the positioning hole along the axis of the positioning shaft (the height direction). Specifically, the positioning part <NUM> may be provided with the positioning hole and the matching part <NUM> may be provided with the positioning shaft, or the positioning part <NUM> may be provided with the positioning shaft and the matching part <NUM> may be provided with the positioning hole. Alternatively, the positioning part <NUM> and the matching part <NUM> may be sleeves that are nested one another, which are not specifically limited here.

Taking the positioning part <NUM> with the positioning hole and the matching part <NUM> with the positioning shaft as an example, the positioning part <NUM> may be machined to directly form the positioning hole, or as shown in <FIG>, a first matching structure <NUM> provided with the positioning hole may be fixed to the positioning part <NUM> through bolt connection or welding and so on. Similarly, the matching part <NUM> may be machined to directly form the positioning shaft, or as shown in <FIG>, a second matching structure <NUM> provided with the positioning shaft may be fixed to the matching part <NUM> through bolt connection or welding and so on.

Furthermore, the end of the positioning shaft is a conical surface, and/or the positioning hole is a conical hole, and a large-diameter section of the conical hole faces a side of the positioning shaft. That is to say, at least one of the ends of the positioning shaft and the positioning hole is provided with a guide structure, and the guide structure is a conical surface to ensure a stable fit between the positioning shaft and the positioning hole. Specifically, during the braking process, the positioning shaft and the positioning hole are in a disengaged state. Due to reasons such as vibration, the relative position between the positioning hole and the positioning shaft is easy to shift. The arrangement of the guide structure can ensure that the positioning shaft can be re-matched with the positioning hole when the magnet track braking device <NUM> is driven up by the drive member <NUM> to ensure a stable position.

In the embodiment, the framework further includes a hanging seat <NUM>, and the hanging seat <NUM> is arranged on the side beam <NUM> and is used for installing the magnet track braking device <NUM>. When the magnet track braking device <NUM> is not working, the magnet track braking device <NUM> is fixed through the hanging seat <NUM> and the limiting seat <NUM> to ensure that the magnet track braking device <NUM> and the framework are stable and avoid shaking. Specifically, as shown in <FIG>, the hanging bracket <NUM> includes a rectangular hanging frame, and a side frame of a side of the rectangular hanging frame forms a mounting beam <NUM>. An end of the mounting beam <NUM> extends outward along the axis direction of the mounting beam <NUM> and passes through the side beam <NUM> and is fixed to the side beam <NUM> by welding. A side frame of a side of the rectangular hanging frame opposite to the mounting beam <NUM> is provided with a hanging connector <NUM>, and the hanging connector <NUM> is configured to fix to the drive member <NUM> of the magnet track braking device <NUM>. That is to say, the rectangular hanging frame is equivalent to that including the mounting beam <NUM> and a hanging arm <NUM> of a U-shaped structure. An end of the mounting beam <NUM> passes through the side beam <NUM> and is fixed to the side beam <NUM>. Two side walls of an opening end of the U-shaped structure are fixed to the mounting beam <NUM> by welding, a bottom wall of the U-shaped structure is provided with the hanging connector <NUM>, and the hanging connector <NUM> is configured to fix to the drive member <NUM> of the magnet track braking device <NUM>.

The specific structure and arranging position of the hanging structure for hanging the magnet track braking device <NUM> are not limited in the embodiment. For example, the hanging structure may be a hanging beam fixed to the side beam <NUM>, and an end of the mounting beam <NUM> passes through the side beam <NUM> and is fixed to the side beam <NUM> by welding. Such arrangement can simplify the overall structure and make the overall structure more regular. Meanwhile, the rectangular frame structure can ensure the strength of the structure, simplify the overall structure and achieve lightweight. In addition, the hanging seat <NUM> is a forging, which ensures high structural strength of the hanging seat <NUM>.

Further, an upper end face of the side beam <NUM> is provided with an upper cover plate. The upper cover plate is provided with an extension section toward the side, and the extension section can be attached and fixed to an upper end face of the mounting beam <NUM> to further enhance the stability of the connection between the mounting beam <NUM> and the side beam <NUM> and ensure the structural strength of the hanging seat <NUM>.

In the embodiment, the framework further includes a shaft-disk brake hanging seat <NUM> fixedly arranged on the cross beam <NUM>, and the shaft-disk brake hanging seat <NUM> is fixed to the cross beam <NUM> by tube-plate welding. That is to say, the bogie is braked through the magnet track braking device <NUM> and a shaft-disk brake device at the same time, to ensure the braking effect. The shaft-disk brake hanging seat <NUM> is fixedly arranged on the cross beam <NUM>, so that the installation of the shaft-disk brake device can avoid the magnet track braking device <NUM>, thus realizing the compatibility of the two braking modes.

In the embodiment, a lower end face of the cross beam <NUM> is further provided with a double traction rod seat <NUM>. The double traction rod seats <NUM> of the two cross beams <NUM> are arranged symmetrically with respect to the center of the framework, which can realize overall lifting of the bogie, and the traction force and the braking force are transmitted through two double traction rod seats, which increases the reliability and can give space for a motor hanging seat.

In addition, in the embodiment, a wheelbase of the framework is less than <NUM>, which can meet the requirement of passing through a small curve radius.

Claim 1:
A bogie comprising a framework and a magnet track braking device (<NUM>), the framework comprising a frame structure enclosed by two cross beams (<NUM>) and two side beams (<NUM>), lower end faces of two side ends of each of the two cross beams (<NUM>) are respectively fixedly provided with limiting seats (<NUM>), and each limiting seat (<NUM>) comprises a blocking part (<NUM>) and a positioning part (<NUM>);
the blocking part (<NUM>) is configured to abut against and match an abutting part (<NUM>) arranged on the magnet track braking device (<NUM>), and a blocking direction of the blocking part (<NUM>) arranged on one of the two cross beams (<NUM>) is opposite to a blocking direction of the blocking part (<NUM>) arranged on the other of the two cross beams (<NUM>);
the positioning part (<NUM>) is configured to cooperate with a matching part (<NUM>) arranged on the magnet track braking device (<NUM>), so as to allow the magnet track braking device (<NUM>) to move relative to the framework along a height direction,
wherein the limiting seat (<NUM>) is further provided with a connection part (<NUM>), the blocking part (<NUM>) and the positioning part (<NUM>) are fixed to the connection part (<NUM>), the connection part (<NUM>) is provided with an arc-shaped connection surface (<NUM>) that fits with an outer wall of the cross beam (<NUM>), and the arc-shaped connection surface (<NUM>) is attached to the outer wall of the cross beam (<NUM>) and is fixed to the outer wall of the cross beam (<NUM>) by welding.