JP5121191B2 - Low-floor railway vehicles and low-floor trams - Google Patents

Description

The present invention relates to a low-floor railway vehicle and a low-floor type tram that travels on a track mainly by one-man operation.

  In the 21st century, a full-fledged aging society is about to come and low-floor trams are attracting attention for reasons such as responding to people with limited mobility (see, for example, Patent Documents 1 and 2).

  The first requirement for low-floor trams with one-man driving is to have a flat low floor with no steps from the passenger entrance at the rear or middle of the vehicle to the passenger exit at the tip (back or side of the cab). Is done. In order to realize such a low-floor type tram, the axle of a general carriage interferes with the low floor, so it is conceivable to use small-diameter wheels so that there is no risk of interference. Then, there are a motor and a gear box, and it is difficult to make such a configuration. On the other hand, if the cart is an independent shaft cart that does not pass through the axle, a low floor portion can be provided between the wheels.

  Therefore, in order to satisfy the above-mentioned requirements, the cart may be a skew shaft cart as long as the knitting end closer to the vehicle end than the passenger entrance, but if it is provided in other parts, it needs to be an independent shaft cart. There is. If the independent shaft bogie is a bogie bogie, a sufficient through-passage width cannot be ensured, so there is no significance in adopting an independent shaft bogie bogie from the viewpoint of securing a low floor.

  Therefore, the arrangement of each carriage type during train formation is the pattern shown in Table 1 below.

ここで、「ボギー台車」とは車体に対し旋回し得る台車をいい、「単台車」とは車体に対し旋回しない台車をいい、「串軸」とは左右の車輪が車軸で結合されている輪軸をいい、「独立軸」とは左右の車輪が各々独立に回転し得る輪軸をいう。

Here, “bogie bogie” refers to a bogie that can turn relative to the vehicle body, “single bogie” refers to a bogie that does not turn relative to the vehicle body, and “skew shaft” has left and right wheels connected by an axle. The wheel shaft is referred to as “independent shaft”, which means that the left and right wheels can rotate independently of each other.

  By the way, in principle, the guide mechanism using rails is completely different between a single-shaft cart and a two-shaft cart from the viewpoint of steering. Since the single-shaft cart itself does not have a steering function, a device such as a link mechanism is required separately. Therefore, in order to simplify the system, the inventor decided to employ a biaxial cart except for such a monoaxial cart.

From the above examination results, the minimum unit of the vehicle is divided into the following four types.
A: Single vehicle (vehicle using independent bogie that is not bogie)
B: Bogie car (one cart)
B2: Bogie car (two trolleys)
C: Suspended vehicle (a vehicle body supported by vehicles in front and rear, without a carriage)
If a knitting that satisfies the above requirements is created by combining them, the four types shown in the following Table 2 can be considered.

タイプIIIは、両端に来る単車（Ａ）に出入口をもってくるかどうかで、２タイプIII，III’に分けられる。これらを模式的に表すと、図１１のようになる。

Type III can be divided into two types III and III ′ depending on whether the single vehicle (A) at both ends has an entrance. These are schematically shown in FIG.

  In this way, various low-floor type trams have been proposed. However, as a second requirement, there is a desire to maximize the full-width completely low floor portion that becomes the low floor surface over the entire width of the vehicle body. This is because some parts of the independent axle bogie have a low floor between the wheels, but the wheel part is a high floor with a considerably high floor surface, which can only be used for the placement of seats, etc. This is because the person cannot select the seat arrangement freely. In particular, in one-man operation, a free layout should be considered, such as eliminating a stool near the crowded passenger exit. In addition, since a low-floor type vehicle is generally equipped with equipment mainly on the rooftop, if there is a shortage of space, it must be placed on the floor.

  Therefore, if the bogie space B (when not bogged), B ′ (when bogged), the entrance / exit space D, the distance G between connecting surfaces, etc., the space Xi (i = 1 to 4) which is a low floor surface over the entire width of the vehicle body is As shown in FIG. 11, when a numerical value of an example is substituted for a vehicle having a total length of 15 m, a type having a full width and a low floor ratio is type I or III ′.

FIG. 12 shows a summary of the low floor ratio and the full width full low floor ratio.
JP 2001-158346 A (paragraphs 0006, 0007 and FIGS. 1 to 3) JP 2001-138905 A (paragraphs 0006 to 0012 and FIGS. 1 to 3)

In Type I or III ', to the vehicle length from the relationship biasing the definitive when curving is limited, also, low implantation rate is lowered (i.e. the cab increases) reversed. Except Type I and III ', II has the highest overall floor width and floor area, and the lowest floor area is the largest (a half-chamber cab can be configured even if the passenger exit is at the front edge just like a bus. Because). However, since it is a single-car configuration, there is no degree of freedom in allocating cabins due to the balance of the center of gravity, up to two-car trains, and there is no possibility of extending to long trains.

Therefore, what remains is Type III and IV, but in Type III, the area around the exit that gets crowded when getting off is always a narrow passage, so it is not desirable when one-man operation is required, It is desirable to be able to arrange guest rooms freely.

  In this sense, Type IV is ideal, but Type IV is inferior in both low floor ratio and full width full low floor ratio. The cause is that too much space is taken by the bogie truck at the tip, and if the space C in this portion can be reduced, the inventor has conceived that an ideal low floor type vehicle can be configured, and the present invention is It has been reached.

In Type IV, the space of B ′ is reduced to space C, which is referred to as Type IV ′. In order to realize the space C, the one side shaft of the bogie truck is a small-diameter wheel, and this portion is configured to sink into the low floor portion. By doing so, it is possible to expand the complete low floor portion, which is a low floor surface, over the entire width of the vehicle with the bogie, without using advanced single-axis steering technology. The condition that the full width completely low floor portion X4 ′ in type IV ′ is larger than X3 in type III is C <(B + D) / 2 as shown in FIG. In the example of B = 2500 mm and D = 1300 mm, C <1900 mm is sufficient. In the example, since C = 1500 mm, the full width complete low floor ratio of 39% of type IV is of type III. It is larger than 34%. The low floor ratio is the same 63%, which is not deteriorated.

The present invention is a low-floor railway vehicle in which one side of a bogie truck is a small-diameter wheel, and this portion is submerged under the floor of the passenger cabin, so that a portion having a low floor surface can be secured to the maximum in the passenger compartment. And it aims at providing a low-floor type tram.

The invention of claim 1 is a low-floor railway vehicle comprising a vehicle body including a driver's seat and a cabin, and a carriage, the carriage comprising a main axle having large-diameter wheels fixed on both sides, and the large axle. A sub-axle in which a small-diameter wheel having a smaller outer diameter than the diameter wheel is fixed on both sides, a main axle frame that supports the main axle, a sub-axle that supports the auxiliary axle, and is connected to a rear end of the main axle frame, A sub-axle frame swingable in a vertical direction with respect to the main axle frame, the driver seat is provided above the large-diameter wheel, and the cabin is provided above the small-diameter wheel . Here, the diameter of the small-diameter wheel is a diameter that can realize a low floor height of 360 mm or less from the road surface.

In this way, the driver's seat is provided above the large-diameter wheel, and the cabin is provided above the small-diameter wheel. Therefore, the cabin of the vehicle with the cab has a floor portion and a passage under the seat. Both floors have a low floor surface, and it is possible to secure the maximum width of the vehicle body with a low floor.

In this case, as described in claim 2, between the main axle and the sub-axle, between the floor surface of the driver's seat and the floor surface of the cabin located at a position lower than the floor surface. The passenger compartment may further include a surface portion, and the cabin may be configured such that the floor surface height from the vertical surface portion to the rear end of the vehicle body along the longitudinal direction of the vehicle is lower than the floor surface height of the driver seat .

Further, according to a third aspect of the present invention, there is further provided a biasing means that is provided between the main axle frame and the auxiliary axle frame, and biases each of the small-diameter wheels downward via the auxiliary axle. It is also possible.

According to a fourth aspect of the present invention, an entrance / exit part of the cabin may be provided above the small-diameter wheel .

A low-floor type tram comprising the low-floor type railway vehicle according to claim 1 and an intermediate vehicle connectable to the low-floor type railway vehicle, wherein the intermediate vehicle is , An intermediate passenger cabin having a first seat portion provided at both ends in the vehicle width direction and a first passage portion provided between the seat portions, the floor height of the first passage portion being It can be set as the structure which is substantially equal to the floor surface height of the said passenger room of a low floor type rail vehicle.

According to a sixth aspect of the present invention, the intermediate vehicle further includes a carriage having at least two sets of independent wheels that can rotate independently, and the first seat portion is provided above the independent wheels. Or a second seat portion provided at both ends of the cabin in the vehicle width direction, and provided between the floor surface of the cabin and the second seat portion , as defined in claim 7. power use further Ru comprising a supply power storage device, or can be configured.

As described above , the present invention provides the driver's seat above the large-diameter wheel and the cabin above the small-diameter wheel, so that it is possible to maximize the vehicle body full width low floor portion in the cabin. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  8 is a plan view showing an embodiment of a two-axis bogie used in a low-floor type tram according to the present invention, FIG. 9 is a side view thereof, and FIG. 10 is a left half view of FIG. The right half is a view in the direction of arrow B in FIG.

  As shown in FIGS. 8 and 9, the biaxial bogie 1 used for the low-floor type tram 21 according to the present invention (for example, see FIGS. 1 and 2) is a vehicle 22 with a cab arranged before and after the formation. , 23 is a cart with a pillow beam 3 that is attached via a pair of left and right pillow springs 2 below the front end portion (frontmost end portion or rearmost end portion) of the vehicle body 20, and is centered on the center position in the width direction of the pillow beam 3. 4 is provided with a carriage frame 5 supported so as to be able to turn horizontally around the center. Between the front portions of the main axle frame 5a on both sides of the bogie frame 5, the main wheel shaft 6 provided with large-diameter wheels 6a (for example, a diameter of 600 mm) on both sides of the axle 6b is rotatably attached.

  As shown in FIG. 10, tread brakes 7 facing left and right large-diameter wheels 6a are provided on both sides of the horizontal beam 5b connecting the main axle frames 5a on both sides. Further, a reduction gear device 8 is integrally incorporated on the left side of the axle 6b, and a drive device 9 and a reduction gear device 8 attached near the center of the lateral beam 5b are connected, and the large-diameter wheels 6a on both sides are connected to the drive wheels. It is set as the structure which functions as.

A front end portion of the auxiliary axle frame 10 is connected by a horizontal pin 11 so as to be swingable in the vertical direction between the rear end bifurcated portions of the main axle frames 5a on both sides. Between the rear parts of the auxiliary axle frames 10 on both sides, the auxiliary wheel shaft 12 provided with a small-diameter wheel 12a (for example, 250 mm) as a guide wheel on both sides of the axle 12b so as to be integrally rotatable is rotatably attached. Swings up and down around the center. At the rear end portion of each main axle frame 5a, a bracket (spring receiver) 13 is provided so as to integrally project laterally from a lower portion slightly in front of the horizontal pin 11, and in the longitudinal direction of the auxiliary axle frame 10 from the intermediate position to the side. A coil spring (shaft spring) 14 is mounted between the front end portion 10b of the bifurcated portion 10a and the bracket 13 so that the small-diameter wheel 12a is urged downward. Therefore, the small-diameter wheel 12a is urged downward about the horizontal pin 11 via the auxiliary axle frame 10, and the small-diameter wheel 12a is pressed against the track (rail) with a constant load.

  Thus, wheel weight loss such as the small-diameter wheel 12a floating from the track is prevented, and contact between the small-diameter wheel 12a (or the auxiliary axle frame 10) and the lower surface of the vehicle body 20 is avoided at the same time.

It is to be noted that if the shaft spring constant of the small-diameter wheel 12a or the large-diameter wheel 6a (main wheel) is made non-linear, the spring constant becomes harder when compressed, and the spring constant becomes softer on the extension side, thereby Reduction of wheel load can also be improved.

As shown in FIGS. 9 and 10, first brackets 15 a are respectively provided on the left and right sides of the lower surface of the pillow beam 3 of the bogie 1 so as to protrude downward, and the lower ends of the first brackets 15 a and coil springs are provided. A bolster anchor 15 is connected to a second bracket 15 b fixed to the vertical surface portion 20 a of the vehicle body 20 located above 14. As a result, the vehicle body 20 is pulled through the voltaic anchor 15 by the power generated when the large-diameter wheel 6 a of the bogie 1 is driven by the drive device 9. Note that the upper end of the guard plate 16 is fixed downward at the tip of the carriage frame 5. In FIG. 9, reference numeral 30 denotes a track (running rail) .

  As described above, the biaxial bogie 1 used for the low-floor type tram 21 (see, for example, FIG. 1 and FIG. 2) is configured. Since the large-diameter wheel 6a is disposed in the center and the small-diameter wheel 12a (guidance wheel) is disposed near the center of the vehicle, for example, a vehicle having a front cab and a rearmost cab as a driver's cab, and a vehicle closer to the center than that. With the configuration, it is possible to realize a one-man-operated vehicle that secures a portion having a low floor over the entire width of the vehicle body in the cabin. In addition, since the maximum portion of the cabin that has a low floor is secured across the entire width of the vehicle body, the degree of freedom in the layout of seats arranged in the cabin is increased. Here, since the small-diameter wheel 12a has a diameter of 250 mm, a low floor is realized in which the low floor height is 360 mm or less from the road surface.

  Further, since both the large-diameter wheel 6a and the small-diameter wheel 12a use skewer shafts in which the wheels on both sides are fixed to the axle, the distance between the back surfaces of the large-diameter wheel 6a and the small-diameter wheel 12a is accurately defined, and the small curve When the vehicle passes through the bifurcation, the rear surface of the wheel can be brought into contact with the guard rail and guided.

  Further, a large-diameter wheel 6a is arranged at the foremost end or the rearmost end of the vehicle as a main wheel, a small-diameter wheel 12a of a small-diameter wheel is arranged near the center of the vehicle, and the main axle frame 5a turns horizontally with respect to the vehicle body 20 Since the sum of the lateral pressure acting on the large-diameter wheel 6a and the small-diameter wheel 12a due to resistance and the lateral pressure required to enter the curve and travel the entire bogie 1 is applied to the large-diameter wheel 6a. It is possible to prevent an excessive lateral pressure from acting on the small-diameter wheel 12a side, and it is possible to prevent wheel load loss and derailment caused by the small-diameter wheel 12a.

  Next, an embodiment of a low-floor type tram according to the present invention provided with a bogie axle cart 1 will be described with reference to FIGS. 1 and 2.

  As shown in FIGS. 1 and 2 (a) and 2 (b), the low-floor type tram 21 of this example includes vehicles 22 and 23 with cabs before and after a vehicle P dedicated vehicle 24 with a coupler 28 and a hood 29. It consists of a three-car train that is articulated through the vehicle. The front and rear vehicles 22 and 23 are provided with a cab D at the tip, and except for the cab D, the cab D is configured as a cabin P having a low floor across the entire width of the vehicle body from the cab D toward the center in the vehicle body length direction. The floors 22b and 23b of the cab D of the vehicles 22 and 23 are slightly higher than the low floors 22a and 23a of the passenger cabin P. This is because the pillow beam 3 of the bogie 1 having a small diameter wheel 12a (guide wheel) is attached via the pillow spring 2. The small-diameter wheel 12a of the biaxial bogie 1 is disposed below the low floor portions 22a and 23a of the passenger cabin P near the center in the vehicle body length direction, and the large-diameter wheel 6a constituting the other shaft is disposed below the cab D. Is done. A pair of left and right bolster anchors 15 are connected to the vertical wall 20a at the step portion between the cab D and the cabin P of the vehicle body 20.

  With this arrangement, the floor portion under the seats 22c and 23c and the floor portions of the passages 22d and 23d are both low. That is, the passenger compartment P has low floor portions 22a and 23a that are low floor surfaces over the entire width of the vehicle body. Here, the passage width is secured to a certain width (for example, 800 mm) or more in order to smoothly move the passengers.

  In the passenger compartment P of the vehicles 22 and 23, the seats 22c and 23c are arranged facing each other in the vehicle width direction, and a storage battery BA (for example, a large dead space is used on the low floor surface below the seats 22c and 23c. Nickel metal hydride battery) is arranged, and in a section where there is no overhead line, the battery can be driven using the storage battery BA as a power source. That is, in the section where the overhead line is installed, current can be collected from the overhead line by the pantograph 27 described later, and the vehicle can be run with the power and charged with the storage battery BA, and can be run with the storage battery BA as the power source in the section without the overhead line.

  By the way, the train 21 usually travels by taking electric power from an overhead line and rotating a motor. During braking, the motor is used as a generator to return power to overhead overhead lines to increase energy efficiency (regenerative braking). However, even if power is returned to the overhead line, if there is no other train that uses regenerative power, the motor does not work as a generator (regeneration expired), switching to mechanical braking, and the kinetic energy of the train becomes heat. And diverged. Therefore, the train of the present invention dramatically increases the energy efficiency by storing the generated energy in the storage battery BA and effectively using it as a motor drive at the time of departure and as a power source for auxiliary equipment.

  In addition, although doorways that are opened and closed by doors 22e and 23e are provided adjacent to the seats 22c and 23c of the vehicles 22 and 23, an inclined floor that slightly lowers the doorway in consideration of drainage of the floor portion. When the portion is not taken into consideration, the floor portions 22f and 23f of the doorway are also the same low floor portion as the passage. That is, the front and rear vehicles 22 and 23 are vehicles in which the cabin P excluding the cab D has a low floor over the entire width of the vehicle body.

The middle passenger-only vehicle 24 is provided with seats 24b on both sides of the passage 24a so as to face each other in the vehicle length direction. The passage 24a is a low floor having the same height as the front and rear vehicles 22 and 23, but the floor 24c is slightly higher below the seat 24b. This is because an independent wheel 25 (for example, a diameter of 610 mm) rotatably supported by the axle box 25a is disposed below the floor portion 24c, and a pillow spring 26 is provided between the high floor portion 24c and the axle box 25a. . Note that a pantograph 27 for taking in electric power from an overhead line is provided on the roof of the vehicle 24, and current is taken into the vehicle from the overhead line (not shown) .

  In addition, as shown in FIGS. 3A to 3C, the cab D is provided with a console box 62 on the front side of the driver's seat 61. The console box 62 is immediately before the train when the driver stands up. The height is set so that it can be seen (see FIG. 3B). A destination indicator 63 is disposed above the console box. A destination display setting device 64 and a camera / monitor controller 65 are arranged from the front side above the right side of the driver's seat 61, and a brake receiver 66 is arranged above the left side. Between them and above the driver's seat, distribution boards 67A and 67B and a buzzer box 68 are arranged. A wireless device 69 and a TFT liquid crystal display panel 70 are disposed above the rear portion of the driver seat 61. Further, a fare box 71 is arranged behind the driver's seat 61, and the driver can confirm the introduction of the fare only by rotating the driver's seat 61. Although not specifically illustrated, a joystick type mascon for driving is mounted on the armrest portion of the driver seat 61 so that the front and rear positions of the driver seat 61 need not be adjusted.

  As described above, the peripheral devices are arranged on the ceiling portion above the cab D as much as possible, so that a wide field of view from the front to the side of the driver seat 61 can be secured.

As shown in FIG. 4, on the roofs of the vehicles 22 and 23, the brake air tank 31 (BR) , the brake control device 32 (BCU) , the main control device / auxiliary power supply device 33 (VVVF / CVCF) and an air conditioner 34 (HVAC) are provided, the vehicle 22 is provided with a power supply control device 35 (charge / discharge device), and the vehicle 23 is provided with a compressor 36 (Comp) and a source air tank 37 (MR). ing. On the roof of the vehicle 24, a brake air tank 31 (BR) , a brake control device 32 (BCU) , a filter reactor 38 (FL1 FL2) , a high-speed circuit breaker 45 (HB ), a main switch 46 (MS) , a main switch Fuses 47 (MF) are respectively provided. In this way, on the roofs of the vehicles 22 to 24, various devices that are normally underfloor devices are arranged with a good weight balance over the whole in order to reduce the floor.

  If it is configured in a three-car train like the low-floor type tram 21, the passage 24a of the intermediate passenger-only vehicle 24 is replaced with the floor portion and the passage under the seats 22c and 23c of the front and rear vehicles 22 and 23 with the driver's cab. Since the floor can be made as low as the floors 22d and 23d, a passage 22d is provided between the cabin P of the front and rear vehicles 22 and 23 and the cabin P of the middle cabin-dedicated vehicle 24. , 22d, and 24a, it can move smoothly without a step.

  Therefore, for example, as shown in FIG. 5, even in the wheelchair V, there is a step between the passenger cabin P of the vehicles 22 and 23 with front and rear cabs and the passenger cabin P of the intermediate passenger cabin vehicle 24 through the passages 22d, 22d, and 24a. It can move smoothly.

In the embodiment described above, the case where the vehicles 22 and 23 are applied to a relatively short three-car train is described. However, as shown in FIGS. 6A and 6B, the vehicle length is longer. The articulated vehicle 41 having an even longer overall knitting length can be formed by using the front and rear cab-equipped vehicles 22 ′ and 23 ′. Here, 22c 'and 23c' are seats, 22d 'and 23d' are passages, and these are low floor surfaces, as in the train 21 shown in FIGS.

  Further, as shown in FIG. 7, it is also possible to use an articulated vehicle 42 in which two intermediate vehicles 24 are used and a suspension vehicle 51 is provided between the vehicles 24 and 24. In this case, in the suspension vehicle 51, the floor portion under the passenger seat 51a and the floor portion of the passage 51b are both under the seats 22c 'and 23c' of the cab and the passages 22d 'and 23d'. By using the low floor surface of the same height, in addition to the passage 24a of the intermediate passenger vehicle 24, the floor portion under the seat 51a of the suspension vehicle 51 and the floor portion of the passage 51b are both low floor surfaces of the same height. Therefore, it moves smoothly between the front and rear vehicles 22 ', 23', the middle passenger-only vehicles 24, 24 and the suspension vehicle 51 through the passages 22d ', 23d', 24a, 51a without any step. it can.

  Further, although not shown, a bogie 1 can be provided at the foremost end and the rearmost end of a single vehicle to realize a low floor tram.

It is a top view which shows one Embodiment of the low-floor type streetcar which concerns on this invention. (A) is the same side view, (b) is a sectional view combining the CC section (left half) of FIG. (A) and the DD section (right half) of FIG. (A)-(c) is explanatory drawing of the layout of the peripheral device of the cab vicinity, respectively. (A) and (b) are the schematic plan views and side views which respectively show arrangement | positioning of equipment on a roof. (A) is a top view which shows the movement of a wheelchair, (b) is EE sectional drawing of Fig.5 (a). (A) and (b) are the top views and side views which show other embodiment, respectively. It is a top view which shows another embodiment. It is a top view which shows one Embodiment of the bogie used for the low-floor type tram which concerns on this invention. It is the same side view. The left half is a view in the direction of arrow A in FIG. 2, and the right half is a view in the direction of arrow B in FIG. It is explanatory drawing of a knitting pattern. It is explanatory drawing which shows the low floor ratio and the full width low floor ratio according to type.

Explanation of symbols

BA Storage battery D Driver's cab P Guest room 1 Two-axis bogie trolley 6a Large-diameter wheel 12a Small-diameter wheel 20 Car body 20a Vertical surface portion 21, 41, 42 Low-floor type tram 22, 23 Vehicle with cab 22a, 23a Low-floor portion 22c, 23c Seat 22e, 23e Door 24 Vehicle for exclusive use of guest room 24a Passage 24b Seat 24c Floor part 27 Pantograph

Claims (7)

A vehicle body including a driver's seat and a cabin;
A low-floor railway vehicle equipped with a carriage,
The cart is
A main axle with large diameter wheels on both sides;
A sub-axle provided on both sides with a small-diameter wheel having a smaller outer diameter than the large-diameter wheel;
A main axle frame that supports the main axle;
A sub-axle frame that supports the sub-axle and is coupled to a rear end of the main axle frame and swingable in a vertical direction with respect to the main axle frame;
A low-floor railway vehicle in which the driver's seat is provided above the large-diameter wheel and the cabin is provided above the small-diameter wheel. A vertical surface portion is further provided between the main axle and the sub-axle, between the floor surface of the driver's seat and the floor surface of the passenger cabin located at a position lower than the floor surface,
2. The low-floor railway vehicle according to claim 1, wherein the cabin has a floor surface height from the vertical surface portion to a rear end of the vehicle body along the longitudinal direction of the vehicle that is lower than the floor surface height of the driver seat.   2. The low-floor railway vehicle according to claim 1, further comprising biasing means provided between the main axle frame and the auxiliary axle frame and biasing each of the small-diameter wheels downward via the auxiliary axle. .   The low floor railway vehicle according to claim 1, wherein an entrance / exit part of the cabin is provided above the small-diameter wheel. A low-floor tram comprising the low-floor railway vehicle according to claim 1 and an intermediate vehicle connectable to the low-floor rail vehicle,
The intermediate vehicle is
An intermediate passenger cabin having a first seat portion provided at both ends in the vehicle width direction and a first passage portion provided between the seat portions;
The floor height of the first passage portion is a low-floor tram where the floor height of the cabin of the low-floor railway vehicle is substantially equal. The intermediate vehicle further includes a carriage having at least two sets of independent wheels that are independently rotatable,
The low floor type tram according to claim 5, wherein the first seat portion is provided above each independent wheel. Second seat portions provided at both ends in the vehicle width direction of the cabin;
The rooms of the floor surface is provided between the second seat portion, electric power for driving further Ru comprising a supply power storage device, low-floor trams of claim 5 or 6.

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