JP4514045B2 - Low-floor railway car body / cart structure - Google Patents

Description

The present invention relates to a vehicle body / trolley structure of a low-floor railway vehicle that can lower the height from the rail upper surface to the vehicle floor surface without significantly changing the wheel diameter. The present invention relates to a vehicle body / trolley structure that makes it easy to get on and off a vehicle on a common platform (shared with trains and trains) without providing steps (steps for elevators). Common homes are mainly installed in rural areas.

The railway vehicle platform includes a train platform and the above-mentioned common platform. The height of the train platform from the rail upper surface is set to 1100 mm, and the common platform is set to 920 mm. On the other hand, a railway vehicle mainly using a train platform has a height of 1130 mm from the top surface of the rail to the floor surface, and has a height difference of about 30 mm from the train platform, so there is no problem in getting on and off.
However, as shown in FIG. 10, when the railway vehicle 1 ′ using the train platform uses the shared platform P, the step difference from the floor surface 5 ′ is 210 mm. By providing the steps, the level difference from the upper surface of the platform is reduced. Even in this case, the level difference is as large as around 70 mm.

By the way, when lowering the floor of a railway vehicle, it is conceivable to use a small-diameter wheel instead of a large-diameter wheel. Generally, the wheel diameter (large-diameter wheel 4 ′ (see FIG. 10)) is about 860 mm . If the diameter is reduced to more than 100 mm and the diameter is reduced to around 750 mm, there is a possibility that the vehicle cannot be safely traveled in the branching device where the tracks are separated. In addition, when a step is provided at the entrance, the step difference becomes considerably large, which makes it difficult for healthy people to get on and off at the entrance and exit, and it is difficult for elderly people and people with handicap to get on and off. Often, an assistant is needed. And since the opening (recess) for boarding / alighting is provided in a part of floor surface in a vehicle, a floor surface cannot be used effectively.

As for the prior art of a low-floor railway vehicle, for example, in a track traveling vehicle, a two-shaft bogie is provided at the front and rear end portions, and a wheel shaft having a wheel having a smaller diameter than the outer end side of the car body is provided at the center of the body of both two-shaft carts. The two floors of the two-axle carts are lowered from the vehicle body center side floor surface and inclined from the vehicle body outer end side floor surface, and this inclined floor surface is extended to form a floor surface that gradually becomes lower toward the vehicle body center floor surface. However, a vehicle body structure in which a low floor entrance / exit is provided at the center of the vehicle body has been proposed (see, for example, Patent Document 1). Patent Document 1 shows a structure in which a central portion in the front-rear direction of a carriage is bent into a substantially concave shape, and an air spring is interposed between the substantially concave central portion and the vehicle body.

  In addition, the bogies before and after the car body are bolsterless bogies, the floor surface in the middle part of the car body in the longitudinal direction is lowered, the middle part in the width direction of the floor surface of the bogie installation part is lowered to the same extent, and both sides are raised to the high floor surface. A vehicle having such a structure has been proposed (see, for example, Patent Document 2).

  FIG. 11 is a system diagram showing an electrical wiring path of a conventional general railway vehicle. As shown in FIG. 11, the main electric wire 19 is inserted through the underframe 3 ′ at the lower end of the vehicle body 2 ′, and the The devices 14 and 15, the underfloor device 16, the switchboard 17 and the like are connected. Only a small part of the wires 19 may be wired in the ceiling or on the wife's surface, but since many wires 19 are inserted through the underframe 3 ', the diameter of the pillow beam or side beam (note: body side) It was necessary to provide a large number of large electric wire holes, and their thickness could not be reduced.

Further, FIG. 9B is an enlarged cross-sectional view of a part of a conventional general single-link traction device. As shown in FIG. 9B, a single-link 21 ′, which is a main component of the traction device 30 ′. Is arranged below the pipe-shaped horizontal beam 8b ′ before and after connecting the side beams of the carriage. In the figure, reference numeral 22 'denotes a single link receiver, 25' denotes a center pin, and 23 'and 26' denote rubber bushes.
Japanese Patent No. 3467590 (paragraphs 0005, 0008 and FIG. 1) Japanese Utility Model Laid-Open Publication No. 58-150563 (Utility Model Registration Request and Figure 1)

  Even if you try to eliminate the step between the common platform (height 920mm or less) currently used in ordinary railways and the floor surface (stepless) of railway vehicles, if you use small-diameter wheels, you will have a different line with a branching device. Because there is a risk of entering, railroad vehicles using wheel diameters that do not interfere with safe driving at the turnout can only lower the floor height to about 1000 mm at the most, so steps for getting on and off (stepping on) Steps) must be provided. However, in such a case, as described above, it is difficult for an elderly person or a person with a handicap in the body to get on and off, and the steps in the cabin cannot be used effectively. Further, when a wheelchair user gets on and off without a caregiver, the step between the vehicle floor and the platform needs to be suppressed to 30 mm or less.

  The present invention has been made in view of the above points, and does not use small-diameter wheels that interfere with safe driving in a branching unit, and is easy to get on and off in a stepless manner, that is, without significantly reducing the wheel diameter. An object of the present invention is to provide a vehicle body structure for a low-floor railway vehicle that can eliminate the step between the platform and the floor.

In order to achieve the above object, the vehicle body / trolley structure of a low-floor railway vehicle according to the present invention is such that the side beam is bent into a substantially concave shape at the central portion in the front-rear direction, and the central portion of the substantially concave carriage and the vehicle body frame while interposed an air spring between the pillow beams, to reduce the thickness of the pillow beam to form a pillow beam of the vehicle body underframe to rectangular cross-section, the wheels of the turning region of the carriage the lower surface of the vehicle body underframe The inside of the vehicle body frame is opened, and a part of the wheel can be arranged in the vehicle body frame. The electric wires arranged in the vehicle are an electric wire through which the pillow beam is inserted and a ceiling, floor of the vehicle body without inserting the pillow beam. Cooling air introduced from the upper part of the front of the vehicle body, with at least part of the wires passing through the pillow beam bypassing the ceiling, floor, and side structure of the vehicle body. Lead from the top of the side structure through the inside of the door pocket toward the outer edge of the body frame. Wherein the drive motor unit by placing in the vehicle body width direction following the longitudinal direction of the cooling air path of a plane substantially L-shaped to the body base frame outside the pivot region of the wheels of the carriage at an intermediate position of the vehicle body width direction The opening cross section of the main part of the cooling air passage which is arranged around the turning area of the wheel of the carriage and is disposed in the front-rear direction avoiding the turning area is substantially square.

According to the vehicle body / trolley structure of the low-floor railway vehicle of the present invention having the above-described configuration, the central portion of the carriage at the air spring mounting position for elastically supporting the vehicle body is made substantially concave, and the thickness of the pillow beam on the vehicle body frame is increased. By reducing the thickness, the height from the rail upper surface of the vehicle body floor is lowered, and by disposing the lower surface of the vehicle body frame and inserting a part of the wheel in the frame, the relative rotation of the wheel with respect to the vehicle body is reduced. In the enabled state, the height (position) of the vehicle body floor is further lowered. Further, the cooling air for cooling the drive motor is not led to the drive motor by the cooling air passage across the turning region of the wheel as in the prior art, but the cooling air passage so as to surround the periphery of the turning region of the wheel in a substantially L shape. The cooling wind guided downward from the door pocket is further guided to the drive motor, and the main part of the cooling air path is arranged in the front-rear direction around the turning area of the wheel of the carriage and avoiding the turning area. By making the opening cross section of the portion substantially square, the width can be narrowed and the flow path area can be sufficiently secured, and the cooling air can be guided without reducing the air volume. In addition, since some of the wires that were passed through the pillow beam and routed in the front-rear direction under the car body were diverted to the ceiling, floor, and side structure of the car body, the number of wires passed through the pillow beam was reduced, By making the wire insertion hole thinner, the pillow beam can be made thinner.

According to a second aspect of the present invention, the traction device for connecting the vehicle body and the carriage is a single link system, and the single link is provided below the substantially central position of the pillow beam of the vehicle body frame and on the left and right sides of the carriage. A bracket is extended upward from a front side beam among a pair of side beams that are arranged above the central portion of the concave carriage at a middle position between a pair of side beams, and connects between side beams of the carriage, and Extend another bracket downward from the lower end of the vehicle body frame, and connect both ends of the single link between the front and rear bracket ends so that they can move in all directions. Can do.

According to the vehicle body / trolley structure of the low-floor railway vehicle according to claim 2, the attachment position of one link, which is a main component of the traction device, is connected between the intermediate positions in the front-rear direction of the conventional truck side beam. Since it has been moved from the lower side of the side beam to the upper side of the side beam, the central part of the side beam of the carriage is formed in a concave shape and an air spring is disposed there to lower the vehicle floor. There is no longer a risk of exceeding the lower end position. If there is a risk that the vibration applied to the vehicle body due to the position of the single link moving upward from the position of the center of gravity of the carriage will increase, for example, to allow movement in all directions between the single link and the bracket. By reducing the elastic modulus of the rubber bush used for the vehicle and increasing the flexibility, it is possible to block the vibration from the cart side to the vehicle body.
As described in claim 3, the wheel diameter of the carriage can be 810 mm . By configuring in this way, it is possible to prevent a different line from entering at the branching device and ensure safe traveling, and it is possible to lower the floor height of the vehicle body by 175 to 185 mm in combination with the improvement of the vehicle body / cart.

  Since the vehicle body / cart structure of the low-floor railway vehicle of the present invention has the above configuration, the following excellent effects can be obtained. In other words, the wheelchair user can reduce the steps between the vehicle body floor and the shared platform to a large extent by reducing the wheels within the range where safe driving with a turnout is possible, and can be achieved steplessly. In addition to being able to get on and off by itself, it can be used effectively by flattening the entire floor surface.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the vehicle body / trolley structure of a low-floor railway vehicle according to the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an embodiment of a vehicle body / trolley structure of a low-floor railway vehicle. A platform P represents a common platform (height from the rail upper surface H0 is 920 mm).

As shown in FIG. 1, the railway vehicle 1 of this example opens a lower frame 3 of a vehicle body 2 so that a lower surface thereof is opened so that a part of a wheel 4 enters the frame 3. At the same time, the diameter of the wheel 4 is reduced to 810 mm, which is 50 mm smaller than that of the conventional one, ensuring safe traveling at the branching device and lowering the position of the floor surface 5 of the vehicle body 2. The pillow beam 6 extending across the frame 3 in the direction perpendicular to the rail (vehicle width direction) is made rectangular in cross section in the rail direction (front-rear direction), and the thickness is made thinner than that of the conventional pillow beam.

  2 is a plan view in which a part of the floor surface is omitted, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. As shown in FIG. 4, the carriage 7 is a bolsterless carriage, and a side beam 8 is formed by bending an intermediate portion 8 a in the front-rear direction into a substantially concave shape, and is formed between a substantially concave intermediate portion 8 a on both the left and right sides and the pillow beam 6 below. An air spring 9 is interposed therebetween. The intermediate portions 8a of the side beams 8 are connected to each other by a pair of pipe-shaped horizontal beams 8b and 8b (see FIG. 8) with a certain distance in the front-rear direction. Here, the total dimension of the part that is lowered by making the intermediate part 8a of the side beam 8 of the carriage 7 substantially concave and the thickness of the pillow beam 6 is reduced. For this reason, if the below-mentioned traction device 30 is disposed below the side beam 8b as in the prior art, the lower end position of the vehicle limit (see FIG. 8B) may be exceeded.

  Therefore, as shown in FIGS. 8 and 9 (a), the traction device 30 allows the vehicle body 2 and the carriage 7 to move relative to each other (vertical direction, vehicle width direction and rotational direction). They are connected at intermediate positions between the beams 8 and 8 and above the side beams 8b and 8b. The traction device 30 includes a single link 21 as a main component, and a single link receiver 22 extends upward from the front side beam 8 b, and the single link receiver 22 has an upper end portion of the single link receiver 22. The front end portion is connected so as to be rotatable in the vertical direction while allowing movement in all directions via a horizontal pin 23 and a rubber bush 24 (also referred to as a rubber bush with a pin) in the vehicle width direction. On the other hand, the center pin 25 extends downward from the center position of the lower end pillow beam 6 of the underframe 3 of the vehicle body 2, and the rear end portion of the single link 21 is a horizontal pin in the vehicle width direction at the lower end portion of the center pin 25. 26 and a rubber bush 27 (also referred to as a rubber bush with a pin) are connected to be rotatable in the vertical direction while allowing movement in all directions. Reference numeral 28 in the figure is a left-right movement stopper.

  As described above, since the attachment position of the single link 21 is moved upward, it is considerably higher than the center of gravity position of the carriage 7, so that the vibration applied from the carriage 7 to the vehicle body 2 may be increased. In order to prevent this, in this example, the elasticity of the front and rear rubber bushes 24 and 27 is lowered to improve flexibility, and vibration from the carriage 7 is absorbed by the rubber bushes 24 and 27 and transmitted to the vehicle body 2. It is difficult. In the present example, SBR having excellent weather resistance is used for the rubber bushes 24 and 27.

  The front and rear wheels 4 of the carriage 7 are drive wheels, and the drive motor 20 is provided symmetrically with the front and rear wheel axles in the width direction intermediate point of the pillow beam 6. In other words, cooling air is sent to the front and rear drive motors 20 for cooling, and this cooling air is taken from the front upper part of the vehicle body 1 through the side of the ceiling and then guided downward in the door pocket as shown in FIG. The air is guided to the drive motor 20 through the cooling air passage 10 in the underframe 3. Each of these cooling air passages 10 is substantially L-shaped in plan view, and as shown in FIG. 2, one side is arranged along the central frame 3a that runs in the front-rear direction in the middle position in the width direction avoiding the turning region of the wheel 4, The other side is arranged in the vehicle width direction at a right angle from the central frame 3a. The inlet 10b of the cooling air passage 10 is tapered from the main part 10a and opened in a rectangular shape, and the outlet 10c is also opened in a rectangular shape.

  On the other hand, as shown in FIGS. 3 and 4, the main portion 10a of the cooling air passage 10 is formed in a substantially square opening cross section so that the maximum amount of cooling air can be obtained with the minimum width. This is because, as shown in FIG. 5, the turning region of the wheel 4 in the underframe 3 has a portion where the gap between the floor 5 and the wheel 4 is only about 10 mm, and the cooling air passage 10 is located in the turning region of the wheel 4. This is because a sufficient amount of cooling air can be secured even if the increase in flow resistance at the right angle portion is taken into consideration from the relationship that the cooling air passage 10 is formed in an L shape. In addition, the code | symbol 21 in FIG. 2, FIG. 5 is a connector.

  FIG. 6 is a cross-sectional view taken along the line CC in FIG. Is arranged. Although not shown in the figure, the main circuit duct and the three electric wire ducts are inserted in the central portion of the pillow beam 6 in the same manner. Otherwise, as shown in FIG. 7 (b), the electric wire 19 is bypassed in the side structure 2A and in both sides of the ceiling 2B, and the switchboard 17 or the current transformer 18 is installed in the JB 13 and the indoor equipment 14/15 and the underfloor equipment 16. It is connected through and supplying power. For this reason, even if the thickness of the pillow beam 6 is reduced, only a minimum number of the electric wires 19 need to be inserted. In particular, in this embodiment, as shown in FIG. 7A, an electric wire duct is disposed along the recess 5 a of the keystone floor 5 and the electric wire 19 is wired.

  In this way, the low-floor railway vehicle 1 of the present embodiment is configured. In this railway vehicle 1, the height of the floor surface 5 can be set to 950 mm from the rail upper surface H0, and the common platform (height 920 mm). And the step difference to 30 mm. Therefore, elderly people and people with walking disabilities can easily get on and off. In particular, wheelchair users can get on and off without a caregiver.

BRIEF DESCRIPTION OF THE DRAWINGS In the longitudinal cross-sectional view of the vehicle width direction which shows the Example of the vehicle body and trolley | bogie structure of the low-floor type railway vehicle which concerns on this invention, the platform p represents the common platform (the height from the rail upper surface H0 is 920 mm). It is a top view which abbreviate | omits and shows a part of floor surface in the rail vehicle of FIG. It is AA sectional drawing of FIG. 2 is a sectional view taken along the line B-B in FIG. 2 together with a side view of the cart in FIG. 1. It is explanatory drawing which represented the clearance gap (specific numerical value) of the wheel 4 and the floor surface 3 in the turning area | region of the wheel 4 in the base frame 3 with the side view of the trolley | bogie. It is CC sectional drawing of FIG. (A) is a longitudinal cross-sectional view in the front-rear direction showing an embodiment of a vehicle body / trolley structure of a low-floor railway vehicle according to the present invention, and (b) is a bb cross-sectional view of (a) with the left half omitted. Both (a) and (b) are system diagrams of electrical wiring. (A) is the perspective view (left half) which shows the Example of the traction apparatus part of the vehicle body and trolley | bogie structure of the low-floor type railway vehicle concerning this invention, and is explanatory drawing of a single link type traction apparatus and a horizontal part. . (B) is sectional drawing in a sleeper direction in order to show the positional relationship of the traction apparatus of the center part of the trolley | bogie concerning this invention. (A) is sectional drawing which expanded a part of single link type traction apparatus with the aa sectional view taken on the line of (b) of FIG. (B) is sectional drawing to which some conventional one single link type traction devices were expanded. It is a longitudinal cross-sectional view in the vehicle width direction showing the vehicle body / trolley structure of a conventional general railway vehicle, and the platform P represents a common home (height from the rail upper surface H0 is 920 mm). It is a systematic diagram of the electrical wiring in the conventional general rail vehicle.

Explanation of symbols

1 Railcar 2 Car body 3 Underframe 3a Center frame (Car body underframe side)
4 Wheel 5 Floor 6 Pillow beam 7 Dolly 8 Side beam (Dolly side)
8a substantially concave middle part 8b side-to-side (cart side)
9 Air spring 10 Cooling air passage 10a Main portion 21 of cooling air passage One link 22 One link receiver 25 Center pin 30 Traction device

Claims (3)

The carriage side beam is bent in a substantially concave shape at the center in the front-rear direction, an air spring is interposed between the center part of the substantially recessed carriage and the floor of the vehicle body, and the pillow beam on the vehicle body frame is formed in a rectangular cross section And reduce the thickness of the pillow beam,
The lower part of the body frame is opened at least within the turning region of the wheel of the carriage so that a part of the wheel can be arranged in the body frame.
The electric wire arranged in the car is composed of an electric wire that passes through the pillow beam and an electric wire that bypasses the ceiling, floor, and side structure of the vehicle body without passing through the pillow beam.
The cooling air introduced from the upper part of the front surface of the vehicle body is guided from the upper part of the side structure through the door pocket toward the outer end of the vehicle body frame, and further in the vehicle body frame outside the turning region of the wheel of the vehicle. A cooling air passage of the shape is arranged in the vehicle body width direction following the front-rear direction at an intermediate position in the vehicle body width direction, and is guided to the drive motor unit, avoiding the turn region around the wheel turning region of the carriage A vehicle body / trolley structure of a low-floor railway vehicle, wherein an opening cross- section of a main part of the cooling air passage arranged in the front-rear direction is substantially square. The traction device for connecting the vehicle body and the carriage is a single link system, and the single link is located below the center position of the pillow beam of the vehicle body frame and at the intermediate position between the pair of left and right side beams of the carriage. Arranged above the central part of the concave carriage,
Among the pair of side beams connecting the side beams of the carriage, a bracket is extended upward from the front side beam, and another bracket is extended downward from the lower end of the vehicle body frame . The vehicle body / trolley structure of a low-floor type railway vehicle according to claim 1, wherein both ends of the one link are connected between the ends so as to be movable in all directions so as to be vertically rotatable. The vehicle body / trolley structure of a low-floor railway vehicle according to claim 1 or 2, wherein the wheel has a wheel diameter of 810 mm .

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