JP2003267215A - Mono-axis bogie for rolling stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mono-axis bogie for a rolling stock suitable for a low- floor tram car in which an independent wheel part with a wheel loaded on a track in a traveling manner is fitted to a truck frame in a steerable manner, the entire structure is simple, and the size and the weight of the entire structure are reduced even when a drive unit is provided, and the wheel smoothly travels along the track even on a sharp curved track of small minimum turning radius. <P>SOLUTION: The independent wheel part 5 having a rotatable wheel 5a on one end of a casing 6a is turnably provided in the horizontal direction on both sides of the truck frame 2, a plurality of support arms 16 are radially expanded from the casing 6a of the independent wheel part 5, a slide body 19 is rotatably fitted to a tip of each support arm 16, each support plate 20 is protruded toward the slide body 19 from the truck frame 2, and the corresponding slide body 19 is slidably supported on a slide surface 20a of each support plate 20. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-axle bogie for a railroad vehicle (one bogie frame provided with a pair of wheels), and is particularly suitable for a low floor tram among railroad vehicles. More specifically, the present invention relates to a uniaxial bogie that is capable of traveling on a curved road having a small turning radius (for example, less than 30 m), and that has left and right wheels each independently operating (horizontal turning).

[0002]

2. Description of the Related Art Recently, LRT (Lig (Lig)) has characteristics such as energy saving, low pollution and barrier-free.
The tram called "ht Rail Transit" has been reevaluated, and its introduction is progressing in various cities including Europe and America. In this type of tram, the vehicle weight is light, and the bogie portion that travels on the track can be configured by a single-axle bogie. As is well known, the uniaxial bogie has a drawback that the bogie is likely to pitch because the bogie frame has only one wheel on each side.

Therefore, for example, in a high-floor uniaxial bogie where the floor of the vehicle is located at a considerably high position (800 to 1100 mm) from the track, a pair of upper and lower radius rods are arranged in front of and behind the bogie frame. DSB based on the prevention of pitching by the rod tension
A uniaxial bogie (Danske Stades Banen) is in operation.

As other prior art, Japanese Patent Laid-Open No. 10-2
There is a single-axle truck described in Japanese Patent No. 50573. This bogie supports both ends of one wheel axle on a bogie frame via shaft springs having a high elastic modulus, and supports the vehicle body by a plurality of pillow springs between the bogie frame and the vehicle body. It has a structure in which the frame and the vehicle body are connected by a traction mechanism that restricts relative movement in the front-rear direction. There is also a trolley described in JP-A-60-64065.

By the way, each of the trucks according to the above-mentioned prior art has a structure in which the trucks having the left and right wheels pivotally support the vehicle to travel along a curved road, so that the turning radius of the curved road is, for example, 30 m or less. When it becomes such a sharp curve,
There is a risk that the wheels will not follow the curved trajectory and cannot be steered (turned horizontally). In other words, in such a sharp curve, the behavior that the wheel has a large (reverse) attack angle with respect to the rail cannot be obtained by completely supplementing the difference in radius between the left and right wheels only by the tread slope of the wheel.
In order to avoid this, it is necessary to individually steer the left and right wheels independently, but a truck having such a structure is proposed in, for example, European Patent Publication No. 308720. In this trolley, a pair of wheels facing each other are horizontally rotatably supported via a drive device having a mechanism that allows displacement of the wheels.

[0006]

However, in the above-mentioned conventional DSB bogie and the bogie described in the above publication,
It is inconvenient in the following points.

That is, the height of the floor of the vehicle is 3 from the track.
In the case of applying to a low floor type tram that is only about 00 mm, it is necessary to make the floor surface at the position where the carriage is arranged considerably high, and the floor surface becomes uneven. In other words,
Not applicable to 100% low floor trams. A trolley according to the related art, such as the trolley disclosed in Japanese Patent Laid-Open No. 60-64065, is a two-axle trolley for a general trolley of a railway and a steering trolley with improved curve passing property, and each axle is rotatable. Since the left and right wheels are integrally and rotatably connected to each other by the formula, it is not suitable for a dolly of the present invention, which is intended for a single-axle dolly and an axle part for connecting the left and right wheels is omitted.

Further, in the above-mentioned conventional bogie, the drive motor is mounted on the bogie frame or the connecting beam, and the driving force is transmitted to the wheels via the speed reducer mounted on the bogie frame or the connecting beam. The structure is very complicated because the wheels are driven through the speed reducer using joints, and the unsprung weight of this trolley is not only the weight of the wheel axle and the speed reducer mounted on the axle, but also the connecting beam. Since the reduction gear and even a part of the drive motor are included, the unsprung weight becomes extremely large, which adversely affects the riding comfort.

Further, in the bogie equipped with the steerable wheels described in the above-mentioned European Patent Publication, the axle member is enlarged to become a bogie frame member, and a drive motor and a speed reducer are directly mounted on the bogie frame member. There is. Therefore, in this method,
When steering the wheels, the motor and the wheels are relatively displaced, so that the drive device needs a mechanism for absorbing the displacement, which complicates the structure. As a result, the unsprung weight becomes large, and the vibration to the motor and the vibration load on the track are large, which adversely affects durability and riding comfort.

The present invention has been made in view of the above points,
Suitable for low-floor trams, the independent wheel part equipped with wheels that are movably mounted on the track is steerably attached to the bogie frame, and even if a drive part is provided, the entire structure is simple. Compact and lightweight, with a minimum turning radius (eg 30m
The purpose of the present invention is to provide a uniaxial bogie for railway vehicles in which wheels smoothly run along a track even on a sharp curved road.

[0011]

In order to achieve the above-mentioned object, a uniaxial bogie for a railway vehicle according to the present invention comprises a bogie frame beam pin having an a) side beam portion at the end of the bogie frame at the bottom of the vehicle body. The other end side is vertically swingably connected via a (horizontal support shaft), and an elastic body such as an air spring is provided between the vehicle body and the bogie frame.
b) An independent wheel unit provided with a rotatable wheel at one end of the casing of the drive unit or the bearing unit is provided below each of the left and right side beam portions so as to be horizontally rotatable around a predetermined position. A plurality of support parts are radially projected from the casing of the independent wheel part or the bogie frame, and d) a slide body is attached to the tip of each support part, and e) the tip of each support part from the bogie frame or the casing. The support plates are provided so as to project toward the slide bodies, and the corresponding slide bodies are slidably supported on the slide surfaces of the respective support plates. In the case of the drive cart, the method according to claim 10 or 11.
As described above, the drive device and the like are incorporated in the casing of the independent wheel portion.

According to the uniaxial bogie having the above structure, the left and right independent wheel parts are horizontally rotatably (steerable) attached to the left and right side beam portions of the bogie frame. Since the wheels rotate horizontally, each wheel smoothly travels along the curve of the rail (track) even on a curved road having a minimum turning radius of 30 m or less. In particular, each of the independent wheel parts is slidable by a slide surface of a support plate projecting from the bogie frame or its casing, with a slide body provided at the tips of a plurality of support parts radially extending from the casing or the bogie frame. Since it supports it, it turns smoothly horizontally.

Further, at least one end of the bogie frame is connected to the bottom of the vehicle body via a bogie frame beam pin (horizontal support shaft) so as to be swingable in the vertical direction, and (at least the other end of) the bogie frame.
Since an elastic body such as an air spring is interposed between the vehicle and the vehicle body, vibrations during traveling are absorbed by the elastic body. Furthermore, regardless of whether the vehicle is a driven cart or a non-driven cart, the independent wheel section is mounted below the side beam section of the bogie frame, which simplifies the structure and reduces vibrations received from tracks such as rails. The transmitted vibration is reduced and the load on the orbit is reduced. In addition, it is mainly composed of a bogie frame, a pair of left and right independent wheel parts, a plurality of sets of supporting parts and supporting plates with a slide body and a sliding surface interposed therebetween, a bogie frame beam pin and an elastic body. The number of parts is small, the overall structure is simple, and the size and weight can be reduced.

According to a second aspect of the present invention, in the uniaxial bogie for railroad vehicles according to the first aspect, the slide surface of each of the support plates is constituted by an arcuate track rail, and the slide body is provided with a linear bearing. It can be composed of a slider unit that slides along a track rail.

According to the uniaxial bogie for railroad vehicle of the second aspect, since the linear bearing is interposed, the independent wheel portion can be swung more smoothly. Moreover, since the turning distance (diameter) of the slide body is constrained within a certain range with respect to the structurally arcuate track rail, it is sufficient to provide a minimum number (1 set, preferably 2 or more) of sets. Further, since the turning center of the independent wheel portion is determined by the slide rail and the slide body, not only the load and moment are supported but also the turning center can be positioned.

According to a third aspect of the present invention, in the uniaxial bogie for railway vehicle according to the first aspect, arcuate guide plates are provided so as to project upward or downward along the peripheral edge of each slide surface of the bogie frame. A slide body slidable along the guide plate or a guide roller movable while rotating can be attached to the tip of the support portion of each of the independent wheel portions.

According to another aspect of the present invention, in the uniaxial bogie for railway vehicles, the movement of the slide body or the guide roller is regulated by the arcuate guide plate to determine the turning center of the independent wheel portion, and the independent wheel portion is predetermined. It turns smoothly around the position.

According to a fourth aspect of the present invention, the kingpin receiver is provided downward on the lower surface of the side beam portion, and the kingpin is protruded upward from the upper surface of the casing of each independent wheel portion so as to be loosely inserted into the kingpin receiver. It is preferable that each of the independent wheel portions is supported so as to be horizontally rotatable.

According to another aspect of the present invention, the center of rotation of each of the left and right independent wheel portions is physically determined by the fitting relationship between the kingpin on the casing side and the kingpin receiver on the side beam portion. .

According to a fifth aspect of the present invention, in the uniaxial bogie for railroad vehicles according to the fourth aspect, the outer wheels are directed outward from the upper side of the casing of each independent wheel portion around the turning center position of the independent wheel portion. While extending a pair of front and rear support plates, support parts are respectively provided so as to protrude from the upper side of each side beam portion of the bogie frame toward the lower side of the lower slide surface of each support plate, and at the tip of each support part. By supporting the slide surface of each support plate from below by the mounted slide body, it is possible to prevent each independent wheel portion from falling.

According to the uniaxial bogie for railroad vehicles of the fifth aspect, even when snow is piled up on the track (track) at the time of snow, there is a risk that snow will adhere between the slide body and the lower slide surface of the support plate. Since there is no snow cover, no equipment such as a snow cover or a heater is required.

According to a sixth aspect of the present invention, knuckle arms are respectively extended forward from the casings of the left and right independent wheel portions, and the knuckle arms on both sides of the knuckle arms are different from each other when the inner track side wheels are compared to the outer track side wheels. It is preferable that the tie rods are pivotally connected so that they can be steered greatly.

According to the uniaxial bogie for a railroad vehicle of the sixth aspect, the steering angle (turning angle) of the inner and outer wheels (independent wheel portions) substantially coincides with the tangential direction of the track in the curved portion, and the outer track. Since a large pressing force is prevented from acting on the side, the vehicle smoothly turns along the curved portion of the track.

According to a seventh aspect of the present invention, between the both sides of the base end vertical portion of the bogie frame and the vertical portion of the vehicle body side, horizontal support shafts are provided at both ends of a pair of upper and lower support links, respectively. A parallel link is formed by connecting the pivots,
A lateral movement stopper that allows relative lateral movement between the vehicle body and the bogie frame at the pivotal connection portion of each of the support links and regulates lateral movement within the allowable range within a predetermined range through an elastic body is provided on the vehicle body and the lateral movement stopper. It can be provided between the bogie frames.

According to the uniaxial bogie for railcars of the present invention, the uniaxial bogie can be relatively moved in the width (left and right) direction with respect to the vehicle body, and the lateral movement is such that an elastic body is interposed between the carbody and the uniaxial bogie. The provision of the stopper reduces lateral vibration of the vehicle body.

As described in claim 8, the bogie frame is
It is composed of a pair of front and rear horizontal beams arranged in parallel with a space between them, and a side beam portion that is integrally provided across both sides of the horizontal beam and has a U-shaped side beam portion when viewed from the side with the opening facing downward. An elastic body such as an air spring may be provided between both ends of the lateral beam and the vehicle body.

According to the uniaxial bogie for railcars of the present invention, since side beam portions are formed on both sides in the width direction of the bogie frame, and independent wheel portions are arranged below the side beam portions so as to be horizontally rotatable.
Since a relatively large space is formed in the middle portion in the width direction of the bogie frame, when applied to the front and rear of a tram, for example, the central portion of the floor surface in front of and behind the vehicle body where the uniaxial bogie is arranged can be lowered. A 100% low floor tram can be constructed.

As described in claim 9, one end of the rod is pivotally connected to at least one end of the knuckle arm extending forward from the casing of the independent wheel portion, and a substantially V-shaped member integrally provided on the rod. The cam follower is attached to the U-shaped or substantially U-shaped cam portion, and the range of the cam portion is limited to a constant value, and the cam follower is urged in a direction orthogonal to the independent direction through a restoring spring. It is preferable to keep the straightness of the wheel portion.

According to the ninth aspect of the present invention, the uniaxial bogie for the railroad vehicle urges the cam portion integrated with the rod connected to the independent wheel portion via the cam follower by the urging force of the restoring spring, and the gradient thereof is used. The component force is extracted as the axial force of the rod and the independent wheels are held in the neutral position, that is, in the straight traveling direction.Therefore, when disturbance occurs during straight traveling at high speed, power running, braking, etc. Stability is secured. on the other hand,
When it is necessary to steer the wheel largely when passing through a sharp curve, the independent wheel portion is steered beyond the area of the cam portion, which may generate a resistance force by the restoring spring when the wheel turns. Absent. Further, since the cam portion is formed in a substantially V shape or a substantially U shape to allow a little play at the neutral position, it is possible that the axial force of the rod suddenly changes at the time of transition from a straight road to a curved road. In addition to preventing it, it also has the effect of lowering the local contact surface pressure of the cam follower.

As described in claim 10, it is preferable that the independent wheel portion is composed of a direct drive motor incorporated in the casing and a wheel directly connected to the drive shaft.

According to the uniaxial bogie for railroad vehicles of the tenth aspect, the wheels are directly connected to the motor and the wheels are driven on the left and right sides to drive the vehicle, whereby the structure is simplified, and the size and weight are reduced.

According to the eleventh aspect, the independent wheel portion may be composed of a motor with a reduction gear incorporated in the casing and a wheel directly connected to the drive shaft.

In the uniaxial bogie for railroad vehicle according to the eleventh aspect of the present invention, the structure is simplified and the size and weight are reduced by arranging the wheels directly connected to the motor on the left and right to drive the vehicle.

According to a twelfth aspect of the present invention, the bogie frame comprises a pair of bogie frame beams having a substantially "L" shape in plan view by connecting the lateral beam end and the side beam part end at a right angle. , The ends of the bogie frames are made to face each other so as to face each other and are combined in a rectangular shape in plan view, and the butted ends are pivotally connected to each other via connecting pins, or elastically connected via spherical bearings or rubber bushes. can do.

According to the uniaxial bogie for railroad vehicles of the twelfth aspect, the bogie frame is divided into two "L" -shaped bogie frame beams to cope with so-called twisting of the track due to irregularity of the left and right rails, and the pivot frame is provided. Since the degree of freedom of torsion of the bogie frame is given by connecting or elastically coupling, so-called wheel load fluctuation can be suppressed to the minimum with respect to irregularities such as twisting of the track.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments in which the single-axle bogie for railway vehicles of the present invention is applied to a low floor type tram will be described below with reference to the drawings.

FIG. 20 is a side view showing a 100% low floor type single vehicle to which the uniaxial truck according to the embodiment of the present invention is applied. 1 to 3 show a uniaxial truck arranged in the vehicle of FIG. 20 according to an embodiment of the present invention. FIG. 1 (a) is a plan view in which the right half is omitted, and FIG. 1 (b) is a left side surface. FIG. 2 and FIG. 2 are front views of FIG. 1A, and FIG. 3 is a plan view showing a state in which the wheels of the uniaxial truck of FIG. 1 are steered to the right.

As shown in FIG. 20, each tram 31 is a 100% low floor type in which the floor 33 is located at a height of about 300 mm from the rail 35 as a track, and the bogies before and after the vehicle body 32 are all uniaxial bogies. 1, the floor 33 has a slightly narrower width at the central position of the uniaxial bogie 1, but is formed of a continuously flat floor over the entire length of the vehicle body 32.

As shown in FIG. 1 (a), each uniaxial bogie 1 arranged in front of and behind the vehicle body 32 is an independent wheel having wheels 5a integrated with a bogie frame 2 and a drive motor (DDM: direct drive motor) 6. It includes a part 5 and the like. The bogie frame 2 is provided with a pair of front and rear lateral beams 3.3 in parallel with each other at intervals in the front-rear direction, and both end portions 3a of the lateral beam 3 are opened so as to straddle the pair of lateral beams 3.3, as shown in FIG. As seen from the side with the opening facing downward, the U-shaped side beam portions 4, 4 are provided in parallel and integrally at intervals in the width (left and right) direction. In this way, the bogie frame 2 has side beams 3 and side beam portions 4
4 forms a rigid body having a substantially rectangular shape in a plan view, and an intermediate portion 4b in the front-rear direction of the upper portion 4a of each side beam portion 4 is formed to be wide inwardly protruding in a substantially triangular shape.

The uniaxial truck 1 is arranged in a recess 34 provided in front of and behind the floor surface 33 of the vehicle body 32 as shown in FIG. Proximal vertical walls 34a on both sides of the vehicle body 32 in the recess 34
On the other hand, one of a pair of support links 7 is vertically mounted with a forked bracket 8a and a horizontal support shaft 8 as a bogie frame beam pin, and the other of the support links 7 is a side beam 4 of the uniaxial bogie 1. A forked bracket 8b and a horizontal support shaft 8 serving as a bogie frame beam pin are pivotally attached to the base end side vertical portion 4c. The upper and lower support links 7 on both sides are attached to the front and rear horizontal support shafts 8.
8 supports the carriage frame 2 with a space in the axial direction to allow lateral movement of the bogie frame 2 in the left-right (width) direction, and mounts a rubber bush (not shown) to tilt the support link 7. It is possible. A pair of stoppers 9 and 9 (9) for restricting the lateral movement of the bogie frame 2 are provided so as to be opposed to the base end vertical wall 34a and the base end side beam 3. ing. Furthermore, the bottom surface 34 of the vehicle body 32 in the recess 34
Between the b and the both ends 3a of the horizontal beam 3, a pillow spring 1 made of a laminated rubber, an elastic body such as an air spring, or a compression spring.
Zeros are installed at the upper and lower ends through spring receiving seats 10a in total about four.

The DDM 6 as a drive motor is incorporated in a cylindrical casing 6a, and a drive shaft 5b (FIG. 1) is projected from one end of the casing 6a to drive the drive shaft 5b.
The wheel 5a is directly connected to the wheel b so as to be integrally rotatable, and the independent wheel portion 5
Is configured. Although illustration is omitted, in the independent wheel portion 5, in addition to the DDM 6, a bearing device, a brake device, and the like are incorporated. As shown in FIG. 4 (a), a kingpin 11 is projected upward on the upper surface of the casing 6 a, and a cylindrical bush 14 is provided in an opening 12 as a kingpin receiver provided in an upper middle portion 4 b of the side beam portion 4. The kingpin 11 is press-fitted and loosely rotatably inserted into the bush 14. Further, a thrust bearing 15 is arranged around the opening 13 below the kingpin receiver 12 to support a vertical load acting around the kingpin 11.

In this example, four supporting arms (supporting portions) 16 are extended from the lower end of the casing 6a of the DDM 6 to the outside in the radial direction at intervals around the kingpin 11 in the circumferential direction. . Further, the knuckle arm 17 extends from the lower end of the casing 6a toward the center of the tip side. The knuckle arms 17 on both sides are rotatably supported and connected by tie rods 18 via vertical pins 18a. The tie rod 18
And the left and right knuckle arms 17 are connected with each other, the inner gauge wheel 5a is slightly larger than the outer gauge wheel 5a when the left and right wheels 5a are steered to one side at the curved portion of the rail 35. The knuckle arm 17 has an inclination angle, dimensions, etc. set so as to steer (turn).

A plate-shaped slide body 19 is fixed to the tip of each support arm 16. On the other hand, a support plate 20 is provided so as to project from the lower end portion of the lateral beam 3 toward the slide body 19, and the slide body 19 is slidably contacted to a slide plate 20a provided at the tip end portion of the support plate 20. With this configuration, as shown in FIG. 3, the independent wheel portion 5 including the wheel 5a can be turned around the kingpin 11, and between the four sets of the slide plates 20a of the support plates 20 and the slide bodies 19 of the support arms 16. The independent wheel portion 5 is prevented from falling, and the vertical load of the independent wheel portion 5 is supported by the thrust bearing 15.

Knuckle arm 17 of one independent wheel portion 5
At tie rod 18 (vertical pin 18a)
As shown in FIGS. 2 and 3, one end of a rod 21a for the restoring device 21 is pivotally attached to the tip end side through a pivot pin 21c. One end of a second rod 21b is pivotally attached to the other end of the rod 21a via a pivot pin 21d, and a cam portion 22 is integrally formed at an intermediate portion of the second rod 21b in the longitudinal direction. There is. As shown in FIG. 5A, the cam portion 22 is substantially V-shaped, and the cam follower 22a is abutted on the cam portion 2 at right angles to the moving direction of the cam portion 22 by the restoring spring 22b.
It is urged toward 2. The strength of the restoring spring 22b can be adjusted by an adjusting screw 22c, and the cam portion 22 is movably supported by a pair of rollers 22d facing the cam follower 22a. The cam shape of the cam portion 22 is shown in FIG. 5B, which is a cam curve s representing the relationship between the rod stroke and the rod reaction force.
As shown in Fig. 2, the rod 21a.2 is attached so as to hold the neutral point.
Although the axial force acts on 1b, the restoring force to the neutral point does not act when the steering angle of the wheel 5a increases, that is, when the turning angle increases and exceeds a predetermined angle. It should be noted that the cam portion 22 is housed in the cam case 23 and is inserted into the second through the insertion holes 23 a at both ends of the cam case 23.
The rod 21b slides in and out freely.

The uniaxial bogie 1 according to the first embodiment of the present invention is constructed as described above. The trolley 31 provided with the uniaxial bogie 1 or the same-axle bogie 1 operates as follows. That is, in FIGS. 1 to 3 and 20,
The tram 31 is the left and right wheels 5 of the front and rear uniaxial bogie 1.
a is driven by the DDM 6 and travels on the rail 35. In the straight portion of the rail 35, the left and right wheels 5a of each uniaxial bogie 1 are interlocked with each other through the tie rods 18 and are maintained in the straight traveling state, and the restoring device 21 keeps the respective wheels 5a in the straight traveling state, that is, neutral. Maintained. Therefore, even when disturbance is applied during straight traveling at high speed, power running, braking, etc., each wheel 5a ensures stable straight traveling. In such a state, for example, the rail 35
It is also secured when traveling on the gentle curved part of
The restoration device 21 allows the left and right wheels 5a to smoothly return to the neutral state even when the vehicle is moving from the curved portion of the rail 35 to the straight portion.

Further, when getting into the curved portion from the straight portion of the rail 35, the left and right wheels 5a are steered in the same direction by interlocking with each other through the tie rods 18. To be exact, the inner gauge side wheels 5a are It is steered slightly more than the outer-rail-side wheels 5a. On the relatively gentle curved portion of the rail 35, the left and right wheels 5 a respectively steer against the biasing force of the restoring spring 22 b of the restoring device 21. Then, when the curved state of the rail 35 becomes steep, the cam follower 22a gets over one slope (cam curve s) of the cam portion 22, so that the biasing force of the restoring spring 22b is applied to the left and right wheels 5a. It has no effect and therefore the wheel 5a is steered smoothly along the curve of the rail.

The steering of the wheel 5a is performed by the independent wheel portion 5
While turning around the kingpin 11, the independent wheel portion 5 is prevented from tipping over between the slide plates 20a of the four sets of the support plates 20 and the slide bodies 19 of the support arms 16, and in this example, the thrust bearings 15 further serve as independent wheels. The vertical load of the part 5 is supported.

Next, FIG. 4 (b) shows another embodiment of the turning center support structure of the independent wheel portion 5. In this example,
A cylindrical elastic body (urethane rubber or the like) 24, which is integrally provided with an outward flange 24a around the lower end and has both upper and lower ends opened, is press-fitted into the opening 13 provided downward in the upper intermediate portion 4b. A rigid cylindrical kingpin receiver 12 ′, which is integrally provided with a flange portion 12 a outwardly around the lower end portion and has upper and lower ends opened, is press-fitted into the cylindrical elastic body 24 for press-fitting. And the kingpin 11 is the bush 14.
It is loosely inserted so that it can be swung inside, and the kingpin receiver 12 '
A thrust bearing 15 is arranged around the lower opening 13 of the. Therefore, the kingpin 11 is the bush 1.
It is common to the above-mentioned embodiment that it is supported so as to be rotatable with respect to No. 4. In the kingpin receiver 12 ′ of this example, the cylindrical elastic body 24 prevents the kingpin 11 and the thrust bearing 15 from being twisted when a relative external force acts between the bogie frame 2 and the independent wheel portion 5. To be done.

FIG. 6 (a) shows another embodiment of the restoring device. In the restoring device 21 'of this example, the cam portion 22' is substantially U-shaped and has a gentle curved portion near the neutral point. It is formed in 22e to provide play. Further, the structure is simplified by omitting the pair of rollers 22d facing the cam follower 22a. For the configuration other than these, the restoration device 2 of the above example
The same reference numerals are used for the common members, and the description thereof will be omitted. The cam shape of the cam portion 22 'is such that the rods 21a and 21b are axially supported so as to maintain a wide range near the neutral point, as shown in a cam curve s' representing the relationship between the rod stroke and the rod reaction force in FIG. Although the directional force acts, when the steering angle of the wheel 5a increases, that is, when the turning angle increases and exceeds a predetermined angle, the restoring force of the restoring spring 22b is not received. It is common to the device 21.

FIG. 7 shows a uniaxial truck according to another embodiment. FIG. 7 (a) is a plan view in which the right half is omitted.
(B) is a left side view.

As shown in FIG. 7A, the uniaxial truck 1 of this example
-2 is integrally formed with the support plates 26, 26 extending symmetrically with respect to the center line L in the front-rear direction from the upper surface of the casing 6a of the DDM 6. The outer peripheral edges of the front and rear support plates 26 are formed in an arc shape with the kingpin 11 as the center.
A slide plate 26a having a constant width is fixed to the outer peripheral edge of the lower surface of 6, and the slide body 19 is slidably contacted with the slide plate 26a. On the other hand, as shown in FIG. 7 (b), the bogie frame 2 has the “U” -shaped side beam portion 4 when viewed from the side with the opening facing downward, and is integrally arranged across both ends of the front and rear lateral beams 3. Two forked brackets 8d are provided on both sides of the vehicle body 32 in the recess 34 on the base end vertical walls 34a, and the brackets 8e are inserted into the brackets 8d so that the bogie frame beam pins (horizontal support shafts) are inserted.
8c, the bogie frame beam pin 8c is provided with a space in the axial direction so as to allow the bogie frame 2 to move laterally, and a rubber bush (not shown) is attached to the bogie frame beam pin 8c. It has the same structure as the bogie frame beam horizontal support shaft 8, and a total of two pillow springs 10 are interposed between the lateral beam 3 on the front end side and the bottom surface 34b in the recess 34 via the spring receiving seat 10a. ing. The bracket 8e is integrally provided on the base end side vertical portion 4c of the side beam portion 4.

As shown in FIG. 7B, a trapezoidal support arm (support portion) 27 extends from the upper part of the front and rear vertical portions 4c of each side beam portion 4 toward the outer peripheral edge of the support plate 26. ,
A slide plate 26a is fixed to the lower surface of the support plate 26, and a slide body 19 is attached to the tip of the support arm 27. Each slide body 19 is slidably mounted on the lower side of the slide plate 26a, and the front and rear sides of the independent wheel portion 5 are supported by the slide bodies 19 so as to be horizontally rotatable from below, and the thrust bearing 1 is centered around the king pin 11.
The independent wheel portion 5 is supported at a total of three points by being supported by the vehicle 5 so as to be horizontally rotatable. In the case of this example, the knuckle arm 17 has a casing 6a as shown in FIG.
It extends from the lower center toward the tip side toward the center.

Further, in this example, the slide member 19 is
The pair of protrusions (rubbing plates) 28 for preventing the slide body 26a from being lifted up are provided on the upper surfaces of the front and rear support plates 26 so as to project upward so that the independent wheel portion 5 can be supported.
When the slide body 26a tries to float up due to back lateral pressure, the protrusion 28 abuts on the lower surface of the upper portion of the side beam portion 4 to prevent the rise. In addition, regarding other configurations, the first embodiment described above is used.
Since they are common to the uniaxial truck 1, common components are designated by the same reference numerals and description thereof will be omitted.

The uniaxial bogie 1-2 according to this embodiment configured as described above has the following advantages.
Slide body 19 for preventing the independent wheel portion 5 from falling
Since the slide plate 26a and the slide plate 26a and the like are arranged above the wheels 5a, the independent wheel portion 5 may be frozen by, for example, snow.
There is almost no obstruction to turning. Since the fall prevention of the independent wheel portion 5 is achieved by supporting the king pin 11 forming the turning center and the pair of front and rear slide bodies 19,
The structure is simplified. The pivotal support structure by the left and right bogie frame beam pins 8c on the base end side is simplified, and the pillow spring 10 is
The reduction to the number of books simplifies the cushioning structure that swingably supports the bogie frame 2 with respect to the vehicle body 31. Although illustration is omitted, when the rail 35 has an irregularity such as a twist, in order to allow the bogie frame 2 to be twisted and reduce the wheel load variation, the side beam 3 and the side beam portion 4 are formed into an I-shaped shape. It is desirable to reduce the rigidity by making an open cross-sectional shape such as a "U" shape.

8 and 9 show a uniaxial truck according to still another embodiment of the present invention. FIG. 8 (a) is a plan view with the right half omitted, FIG. 8 (b) is a left side view, FIG. 9 (a)
9 is an enlarged bottom view of a part (A portion) of FIG.
9B is a sectional view taken along line bb of FIG. 9A.

As shown in FIGS. 8 and 9, the uniaxial truck 1-3 according to the present embodiment is different from the uniaxial truck 1 according to the first embodiment in that the arc-shaped guide plate 41 extends along the outer peripheral edge of the slide plate 20a. And a guide slide body 42 having an arc surface capable of sliding contact with a slide plate 41a provided on the inner peripheral side of the guide plate 41. Are provided separately. In this example,
Since the slide plate 41a is formed in an arc surface centering on the kingpin 11, the independent wheel portion 5 rotates (horizontal turning) by the slide plate 41a and the guide slide body 42.
Since the center position is defined, the burden on the kingpin 11 is small when the independent wheel portion 5 turns, and in other words, the kingpin 11 can be omitted. Other configurations and operations are the same as those of the uniaxial truck 1 according to the first embodiment, and therefore description thereof is omitted, and common members are denoted by the same reference numerals in the drawings.

FIGS. 10 and 11 show a uniaxial truck according to still another embodiment of the present invention. FIG. 10 (a) is a plan view with the right half omitted, FIG. 10 (b) is a left side view, 11 (a) is an enlarged bottom view of a part (A portion) of FIG. 10 (a), FIG. 11 (b) is a sectional view taken along line bb of FIG. 11 (a),
FIG. 11C is a sectional view taken along the line cc of FIG.

As shown in FIGS. 10 and 11, the uniaxial truck 1-4 according to the present embodiment is different from the uniaxial truck 1-3 according to the third embodiment in that the kingpin 11 is omitted and the floating prevention pin (prevention tool) is omitted. 43 is provided. That is, the support piece 4 having a substantially triangular shape is formed on the inner edge of the upper center 4b of the side beam portion 4.
4 is integrally projected, and the through hole 44 is formed at the substantially center of the support piece 44.
a is drilled. Then, the through hole 44 is arranged so as to be the center of turning of the independent wheel portion 5, and then the floating prevention pin 43 is attached to the upper surface of the casing 6a by penetrating the through hole 44 from above the through hole 44. A head portion 43a protruding in the radial direction is integrally formed on the upper end of 43 as shown in FIG. The casing 6
An annular mounting seat 6b (FIG. 11C) is integrally fixed around the mounting position on the upper surface of a. Since other configurations are common to those of the uniaxial truck 1-3 of the third embodiment, description thereof is omitted, and common members are illustrated in the drawings with the same reference numerals.

The uniaxial bogie 1-4 having the above-mentioned structure has the following advantages. That is, when the independent wheel portion 5 floats up with respect to the bogie frame 2, the slide body 19 at the tip of the support arm 16 protruding from the lower end of the independent wheel portion 5 slides on the slide surface 20a of the support plate 20 on the bogie frame 2 side.
While it is suppressed by abutting on the lower side of the bogie frame 2 from being lifted with respect to the independent wheel portion 5, the supporting piece 44 is abutted on the head 43a of the lifting prevention pin 43. For other functions, the above-mentioned Example 3 is used.
Since it is common with the uniaxial cart 1-3, description thereof will be omitted.

12 and 13 show a uniaxial truck according to still another embodiment of the present invention. FIG. 12 (a) is a plan view with the right half omitted, FIG. 12 (b) is a left side view, 13A is an enlarged bottom view of a part (A portion) of FIG. 12A, and FIG. 13B is a sectional view taken along line bb of FIG. 13A.

As shown in FIGS. 12 and 13, the uniaxial truck 1-5 according to the present embodiment is different from the uniaxial truck 1-3 of the third embodiment in that the guide slide body 42 at the tip of the support arm 16 is different. Instead, a guide roller 45 is rotatably attached to the tip of the support arm 16 via a vertical rotation shaft 45a, and four arc-shaped guide plates 46 for guiding the guide roller 45 are provided.
Is provided so as to project downward on the lower surface of the lateral beam 3 on the bogie frame 2 side with a predetermined distance R so that the turning center O of the independent wheel portion 5 is positioned. In the uniaxial truck 1-5 of this example, since the turning center of the independent wheel portion 5 is defined by the four sets of guide rollers 45 and the guide plates 46, the structure is simplified by omitting the kingpin 11, the kingpin receiver 12, and the like. . Regarding other configurations and operations, the uniaxial truck 1 of the third embodiment 1-
3, the description thereof is omitted, and common members are denoted by the same reference numerals in the drawings.

14 and 15 show a uniaxial truck according to still another embodiment of the present invention. FIG. 14 (a) is a plan view, FIG. 14 (b) is a left side view, and FIG. 15 is FIG.
It is a front view of (a).

As shown in FIGS. 14 and 15, the uniaxial bogie 1-6 according to the present embodiment has a "U" -shaped side on a pair of front and rear lateral beams 3 with an end portion 3a formed therebetween. A pair of "L" -shaped bogie frame beams 2a in plan view in which one end of the beam portion 4c is integrally connected with the U-shaped opening facing downward.
Are arranged in a rectangular shape so as to face each other at diagonal positions, and the abutting ends of the pair of bogie frame beams 2a are pivotally connected by connecting pins 29 to form a bogie frame 2 '. Specifically, a forked bracket 29a is provided on the vertical portion 4c of the side beam portion 4, the width of the end portion 3c of the lateral beam 3 is narrowed, and the bracket 29a is inserted into (the forked portion of) the bracket 29a. It is pivotally connected.

Then, the diagonally opposite ends of each bogie frame beam 2a are pivotally attached to the base end vertical wall 34a and the tip end vertical wall 34c of the vehicle body 32 by bogie frame beam pins (horizontal support shafts) 8c. However, on the side facing each bogie frame beam pin 8c, in the vicinity of the right angle part of the bogie frame beam 2a and the bottom surface 3 of the vehicle body 32
A pillow spring 10 is provided between the spring 4 and 4b. Since other configurations are common to those of the uniaxial cart 1-2 of the second embodiment, common members are denoted by the same reference numerals, and description thereof will be omitted.

The uniaxial truck 1-6 according to this embodiment constructed as described above has the following advantages.
In the uniaxial bogie 1-6 of the present embodiment, the bogie frame 2'is divided into two, and the degree of freedom of torsion of the bogie frame 2'is given to so-called track irregularity such as twisting of the left and right rails 35. So-called wheel load fluctuation can be suppressed to a minimum.

Instead of the pivoting / connecting structure by the connecting pin 29 of the present embodiment, for example, a spherical bearing or a rubber bush is interposed for elastic coupling, or the bogie frame 2 of the second embodiment is constructed. The cross-sectional shape of the lateral beam 3 may be an open cross-section such as an I-shape or a U-shape so that it can be deformed in response to twisting.

FIG. 16 shows a uniaxial truck according to still another embodiment of the present invention. FIG. 16 (a) is a plan view and FIG.
6 (b) is a left side view.

The uniaxial bogie 1-7 according to the present embodiment is different from the uniaxial bogie 1-6 described above in that the bogie frame 2'is provided with the base end side on both sides of the base end vertical wall 34a of the vehicle body 32. The pillow pin 10 is pivotally attached by the beam pin 8c, and the pillow spring 10 is provided between both ends of the bogie frame beam 2'on the front end side and the bottom surface 34b of the vehicle body 32, and other configurations are completely common.
The uniaxial bogie 1-7 of the present example has the same merit that the fluctuation of the wheel load can be suppressed to the minimum with respect to the irregularity of the rail 35, similarly to the uniaxial bogie 1-6 of the sixth embodiment. .

FIGS. 17 and 18 show another embodiment of a uniaxial bogie having a bogie frame 2 having a different structure. As shown in these drawings, the uniaxial bogie 1-8 of this embodiment has a horizontal beam 3 Formed in a pentagonal frame 3m that is open on both sides, and the frame 3m on both sides
Are integrally connected to each other by a wide plate 3n at the central portion, and vertical portions 4c are integrally erected at the base end sides of the frame bodies 3m on both sides with the end portions 3a opened. Although the basic structure is the same as that of the uniaxial bogie 1-5 according to the fifth embodiment, the bogie frame 2 such as the floating prevention pin 43 and the substantially triangular support piece 44 is used.
The floating prevention mechanism of the independent wheel portion 5 with respect to is different in that the lifting prevention function is provided by providing the lower flange 46a of the arc-shaped guide plate 46.
Further, the turning center O of the independent wheel portion 5 has an arc-shaped guide plate 46.
The points specified by are also different. Other configurations and operations are the same as those of the uniaxial truck 1-5.
The common members are given the same reference numerals and the description thereof is omitted.

In the above embodiment, the case where the independent wheel portion 5 is provided with the DDM 6 has been described. However, instead of the DDM 6, the induction motor and the planetary gear reducer are arranged on the same rotary shaft as the independent wheel 5a. Good. Even in this case, since relative displacement does not occur between the motor and the independent wheel 5a,
No complicated mechanism is required so that the unsprung weight is kept small. In addition, the independent wheel unit 5 does not include the DDM 6,
It goes without saying that it can also be applied to the case of so-called driven wheels.

Further, FIG. 19 is a perspective view, partially cut away, showing an embodiment of a slider mechanism applicable to a uniaxial truck according to the present invention and an embodiment of a uniaxial truck using the same slider mechanism. . As shown in FIG. 19A, the slider mechanism 47 is composed of a combination of an arcuate track rail 48 and a slider unit 49, and the track rail 48 is attached to the bogie frame 2 side instead of the guide plate 46, as described later. On the other hand, slider unit 4
9 is attached to the tip of the support arm 16 of the independent wheel portion 5. The slider unit 49 moves smoothly by interposing a large number of hard balls 50 between itself and the track rail 48. Grease is supplied from the grease nipple 51 to the housing portion of the hard ball 50. Incidentally. In the figure, reference numeral 52 is a casing, 53 is a lower surface seal, 54 is a side plate, 55 is a hard ball holding band, and 56 is a side surface seal.

The uniaxial bogie 1-9 using the slider mechanism 47 is, as shown in FIG. 19B, the uniaxial bogie 1-9.
5, a slider unit 49 is attached to the tip of the support arm 16 instead of the guide roller 45, and four arcuate track rails 48 that guide the slider unit 49 are connected to the turning center O of the left and right independent wheel portions 5. That is, a predetermined distance R is provided so as to be positioned and the lower surface of the lateral beam 3 on the bogie frame 2 side is projected downward. Uniaxial truck 1 of this example
In -9, since the turning center O of the independent wheel portion 5 is defined by the four sets of the track rails 48 and the slider units 49, the kingpin 11, the kingpin receiver 12, and the like are omitted. Other configurations and operations are the same as those of the uniaxial truck 1-8 of the eighth embodiment, and therefore the description thereof is omitted, and common members are denoted by the same reference numerals in the drawings.

[0073]

As is apparent from the above description,
The uniaxial bogie for railway vehicles according to the present invention has the following excellent effects.

(1) Since the left and right independent wheel parts are horizontally rotatably (steerable) attached to the left and right side beam portions of the bogie frame, the left and right wheels turn horizontally. Even on a curved road with a radius of 30 m or less, each wheel smoothly travels along the curve of the track. In particular, each of the independent wheel parts is slidable by a slide surface of a support plate projecting from the bogie frame or its casing, with a slide body provided at the tips of a plurality of support parts radially extending from the casing or the bogie frame. By supporting it to prevent it from tipping over, it turns smoothly horizontally. Further, the invention can be applied to both moving and non-driving carriages, and the number of parts is small, the overall structure is simple, and the size and weight can be reduced.

(2) In the uniaxial bogie according to claim 2, since the linear bearing is interposed, the independent wheel portion can be swung more smoothly. Moreover, since the turning distance (diameter) of the slide body is constrained within a certain range with respect to the structurally arcuate track rail, it is sufficient to provide a minimum number (1 set, preferably 2 or more) of sets. Further, since the center of rotation of the independent wheel portion is determined by the slide rail and the slide body, it is not necessary to provide the kingpin.

(3) In the uniaxial cart according to claim 3, the movement of the slide body or the guide roller is restricted by the arc-shaped guide plate to determine the turning center of the independent wheel portion, and the independent wheel portion is set at a predetermined position. It turns smoothly to the center.

(4) In the uniaxial truck according to claim 4, the center of rotation of each of the left and right independent wheel portions is physically determined by the fitting relationship between the kingpin on the casing side and the kingpin receiver on the side beam portion.

(5) In the uniaxial truck according to claim 5, there is no risk of freezing between the slide body and the lower slide surface of the support plate even when snow is accumulated on the track (track) during snowfall. The smooth steering of the independent wheel portion is maintained.

(6) In the uniaxial bogie according to claim 6, the steering angles of the inner and outer wheels (independent wheel portions) substantially coincide with the tangential direction of the track in the curved portion, and a large pressing force is exerted on the outer track side. Since it is prevented from acting, it turns smoothly along the curved portion of the track.

(7) According to the uniaxial truck of claim 7,
The uniaxial bogie can be moved relative to the vehicle body in the width (left-right) direction, and lateral vibration of the vehicle body is reduced by interposing an elastic body between the carbody and the uniaxial bogie.

(8) In the uniaxial bogie according to claim 8, since side beam portions are formed on both sides in the width direction of the bogie frame, and independent wheel portions are arranged below the side beam portions so as to be horizontally rotatable, the width of the bogie frame is reduced. Since a comparatively large space is formed in the middle portion of the direction, when applied to the front and rear of a tram, for example, the central portion of the floor surface in front of and behind the vehicle body where the single-axle bogie is arranged can be lowered to 100% lower. A floor tram can be constructed.

(9) In the uniaxial truck according to claim 9, stability is ensured when disturbance is applied during straight traveling at high speed, power running, braking, or the like. On the other hand, when it is necessary to steer the wheels largely when passing through a sharp curved road, resistance is not generated by the biasing force of the restoring spring when the wheels turn.

(10) In the uniaxial bogie according to claims 10 and 11, the structure is simplified and the size and weight are reduced by arranging the wheels directly connected to the motor on the left and right to drive the vehicle.

(11) In the uniaxial bogie according to claim 12, the bogie frame is divided into two "L" -shaped bogie frame beams and pivotally connected to each other for so-called twisting of the track such as irregularity of the left and right rails. Since the bogie frame is given a degree of freedom with respect to twisting by elastically coupling, so-called wheel load fluctuation can be suppressed to a minimum with respect to irregularities such as twisting of the track.

[Brief description of drawings]

1 to 3 are diagrams illustrating an embodiment of the present invention, and FIG.
1A is a plan view in which the right half is omitted, and FIG. 1B is a left side view.

FIG. 2 is a front view showing the uniaxial truck of FIG. 1 (a).

FIG. 3 is a plan view showing a state in which the wheels of the uniaxial truck of FIG. 1 are steered to the right.

4A is a partial cross-sectional view showing an embodiment of a turning center supporting structure of an independent wheel portion 5, and FIG. 4B is an independent wheel portion 5.
It is a partial cross-sectional view showing another embodiment of the turning center support structure of FIG.

5 (a) is an enlarged front view showing an embodiment of a restoring device with a part cut away, and FIG. 5 (b) is a diagram showing a cam curve by the cam portion of FIG. 5 (a). Is.

FIG. 6 (a) is an enlarged front view showing another embodiment of the restoration device with a part cut away, and FIG. 6 (b) is FIG.
It is a diagram which shows the cam curve by the cam part of (a).

FIG. 7 shows a uniaxial truck according to another embodiment, FIG. 7 (a) is a plan view with the right half omitted, and FIG. 7 (b).
Is a left side view.

8 and 9 show a uniaxial truck according to still another embodiment of the present invention, FIG. 8 (a) is a plan view with the right half omitted, and FIG. 8 (b) is a left side view. Is.

9 (a) is an enlarged bottom view of a part (A portion) of FIG. 8 (a), and FIG. 9 (b) is a sectional view taken along line bb of FIG. 9 (a).

10 and 11 show a uniaxial truck according to still another embodiment of the present invention, FIG. 10 (a) is a plan view with the right half omitted, and FIG. 10 (b) is a left side view. Is.

11A is a part (A) of FIG. 10A.
11B is a sectional view taken along line bb of FIG. 11A, and FIG. 11C is cc of FIG. 10A.
It is a line sectional view.

FIG. 12 shows a uniaxial truck according to still another embodiment of the present invention, FIG. 12 (a) is a plan view, and FIG. 12 (b) is a left side view.

FIG. 13 (a) is a part (A portion) of FIG. 12 (a).
FIG. 13B is an enlarged bottom view of FIG.
It is a b line sectional view.

14 and 15 show a uniaxial truck according to still another embodiment of the present invention, FIG. 14 (a) is a plan view, and FIG. 14 (b) is a left side view.

FIG. 15 is a front view of FIG.

16 shows a uniaxial truck according to still another embodiment of the present invention, FIG. 16 (a) is a plan view and FIG. 16 (b) is a left side view.

17 shows a uniaxial truck according to still another embodiment of the present invention, FIG. 17 (a) is a plan view and FIG. 17 (b) is a left side view.

FIG. 18A is a part (A portion) of FIG. 17A.
FIG. 28B is an enlarged bottom view of FIG.
It is a b line sectional view.

FIG. 19 (a) is a partially cutaway perspective view showing an embodiment of a slider mechanism, and FIG. 19 (b) is an embodiment of a uniaxial truck to which the slider mechanism is applied. The right half is omitted. FIG.

FIG. 20 is a view showing a case where a uniaxial truck according to an embodiment of the present invention is applied 1
It is a side view showing an articulated vehicle of a 00% low floor type two-car train.

[Explanation of symbols]

1-1-8 uniaxial truck 2.2 'truck frame 2a bogie frame beam 3 side beams 4 side beam part 5 independent wheels 5a wheels 5b drive shaft 6 DDM (Direct drive motor) 6a casing 7 Support links 8.8c bogie frame beam pin (horizontal support shaft) 9 stopper 10 pillow spring 11 Kingpin 12.12 'Kingpin receiver (opening) 13 openings 14 Bush 15 Thrust bearing 16 ・ 27 Support arm (support part) 17 Knuckle arm 18 tie rod 19 slides 20 ・ 26 Support plate 20a slide surface 21 Restoration device 22 Cam section 22a Cam follower 22b Restoration spring 26a slide plate 28 Protrusion (rubbing plate) 29 connecting pin 31 tram 32 car body 33 floor 34 recess 34a Base-side vertical wall 35 rails 41 Arc guide plate 41a slide plate 42 Guide slide 43 Lifting prevention pin (prevention tool) 43a head 44 Support piece 44a through hole 45 guide roller 46 arc guide plate 47 Slider mechanism 48 circular track rail 49 Slider unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinya Matsuki             2-1-1 Wadayama-dori, Hyogo-ku, Kobe-shi, Hyogo             Kawasaki Heavy Industries, Ltd. Hyogo Factory (72) Inventor Yukinobu Kono             1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries             Akashi Factory Co., Ltd. (72) Inventor Hirohide Matsushima             1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries             Akashi Factory Co., Ltd. (72) Inventor Hideaki Ezaki             1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries             Akashi Factory Co., Ltd. (72) Inventor Koji Kadota             1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries             Akashi Factory Co., Ltd. (72) Inventor Osamu Muragishi             1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries             Akashi Factory Co., Ltd. (72) Inventor Toru Nishida             1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries             Akashi Factory Co., Ltd.

Claims (12)

[Claims] 1. An end portion of a bogie frame having a side beam portion is connected to a bottom portion of a vehicle body via a bogie frame beam pin so that the other end can swing vertically, and an air spring or the like is provided between the vehicle body and the bogie frame. An independent wheel part having a rotatable wheel at one end of the casing of the drive part or the bearing part is provided below the left and right side beam parts so as to be horizontally rotatable around a predetermined position. , A plurality of support parts are radially projected from the casing of each of the left and right independent wheel parts or the bogie frame, and a slide body is attached to the tip of each support part, and the tip of each of the support parts from the bogie frame or the casing. 1. A uniaxial bogie for a railway vehicle, characterized in that support plates are provided so as to project toward the slide bodies, and the corresponding slide bodies are slidably supported on the slide surfaces of the respective support plates. 2. The railway according to claim 1, wherein the slide surface of each of the support plates is formed by an arcuate track rail, and the slide body is formed by a slider unit that slides along the track rail via a linear bearing. Single-axle dolly for vehicles. 3. An arc-shaped guide plate is projected upward or downward along the peripheral edge of each slide surface of the bogie frame, and is slidable along the guide plate or movable while rotating. The uniaxial bogie for a railway vehicle according to claim 1, wherein a guide roller is attached to a tip of a support portion of each of the independent wheel portions. 4. The kingpin receiver is provided downward on the lower surface of the side beam portion, and the kingpin is projected upward from the upper surface of the casing of each independent wheel portion so as to be loosely inserted into the kingpin receiver so that each independent wheel portion is attached. The uniaxial bogie for railway vehicles according to any one of claims 1 to 3, which is supported so as to be horizontally rotatable. 5. A pair of front and rear support plates extend outward from the upper portion of the casing of each independent wheel portion around the turning center position of the independent wheel portion, and beam portions on each side of the bogie frame. By projecting support portions downward from the upper side of the support plate to the lower side of the lower slide surface of each support plate, and supporting the slide surface of each support plate from below by a slide body attached to the tip of each support portion. The uniaxial bogie for a railway vehicle according to claim 1, 3 or 4, wherein each of the independent wheel portions is prevented from falling. 6. A knuckle arm is extended forward from the casing of each of the left and right independent wheel portions so that the knuckle arms on both sides are steered by the inner-gauge wheel as compared to the outer-gauge wheel. The uniaxial bogie for railway vehicles according to any one of claims 1 to 5, wherein the uniaxial bogies are pivotally connected by tie rods. 7. The both sides of the vertical portion on the base end side of the bogie frame and the vertical portion on the vehicle body side are pivotally connected to both ends of a pair of upper and lower support links via horizontal support shafts so as to be parallel. Lateral movement that constitutes a link and allows relative lateral movement between the vehicle body and the bogie frame at the pivotal connection portion of each support link, and limits lateral movement within the allowable range within a predetermined range through an elastic body. The uniaxial bogie for railway vehicles according to claim 1, wherein a stopper is provided between the vehicle body and the bogie frame. 8. The pair of front and rear lateral beams with the bogie frame arranged in parallel with each other with a space therebetween, and "U" when integrally viewed from the side with the opening facing downward on both sides of the lateral beams. 8. A railway according to any one of claims 1 to 7, characterized in that it is composed of a side beam portion having a V shape, and an elastic body such as an air spring is interposed between both ends of the side beam and the vehicle body. Single-axle dolly for vehicles. 9. A substantially V provided integrally with the rod, wherein one end of a rod is pivotally connected to at least one end of a knuckle arm extending forward from a casing of the independent wheel portion.
The cam follower is attached to the U-shaped or substantially U-shaped cam portion, and the range of the cam portion is limited to a constant value. The uniaxial bogie for railway vehicles according to any one of claims 1 to 8, wherein the straightness of the wheel portion is maintained. 10. The railway vehicle according to claim 1, wherein the independent wheel portion is composed of a direct drive motor incorporated in the casing and a wheel directly connected to the drive shaft. Uniaxial cart for use. 11. The railway according to claim 1, wherein the independent wheel portion is composed of a motor with a speed reducer incorporated in the casing and a wheel directly connected to the drive shaft. Single-axle dolly for vehicles. 12. The bogie frame comprises a pair of bogie frames of substantially "L" shape in plan view formed by connecting the lateral beam ends and the side beam portion ends at a right angle. The end portions are abutted so as to face each other and are combined in a rectangular shape in a plan view, and the abutted end portions are pivotally connected to each other via a connecting pin, or are elastically coupled via a spherical bearing or a rubber bush. Item 1. A uniaxial bogie for railway vehicles according to any one of items 1 to 11.