JP2002225703A - Single axle bogie for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight single axle bogie for rolling stock suited for a streetcar with a 100 percent low-floor, having a simple structure, capable of preventing pitching and driving with its wheels cornering smoothly along tracks even if the tracks are steeply curved lines with their minimum turning radius of 30 m or less. SOLUTION: A wheel 14 is rotatably attached inside the central position in the longitudinal direction of a pair of right and left axle beams 12 via an axle 13 so as to be rotatable. The respective axle beams 12 are linked pivotably by a lateral-long link 15 at the end parts so as to be rotatable. The base end of a track frame 11 is linked so as to be pivotable in the vertical direction of a vehicle body 2. The vicinity of the axle 13 of the wheel 14 of the axle beam 12 is pivotably linked under the vicinity of front ends of both side beams 11c of the track frame 11 so as to be pivotable. The front end part 16a of a base link 16 is linked on the base ends of the respective axle beams 12 via cross pins 18 so as to be rotatable in the horizontal and vertical directions. The base end 16b of the base link 16 is linked so as to be horizontally pivotable relative to the track frame 11.

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 (having a pair of wheels in one bogie frame) particularly suitable for a low-floor tram among railway vehicles. The present invention relates to a single-axle bogie that is capable of traveling on a small curved road (for example, less than 30 m) and in which left and right wheels turn in conjunction with each other about a pivot joint.

[0002]

2. Description of the Related Art In recent years, LRT (Lig) has been developed because of its characteristics such as energy saving, low pollution and barrier-free.
The trams referred to as “ht Rail Transit” have been reevaluated and are being introduced in various cities including Europe and the United States. In this type of tram, the weight of the vehicle is light, and the bogie portion running on the track can be constituted by a uniaxial bogie. As is well known, the single-axle bogie has a drawback that the bogie is easily pitched because the bogie frame has only one wheel on each of the left and right sides.

For example, in a high-floor type single-axle truck in which 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 before and after the bogie frame. DSB (Da
A trolley having a structure called “nsk Stads Banen” has been proposed.

As another prior art, Japanese Patent Application Laid-Open No. 10-2
There is a uniaxial carriage described in Japanese Patent No. 50573. This bogie supports both ends of one wheel set on a bogie frame, supports the vehicle body through a plurality of pillow springs between the bogie frame and the vehicle body, and connects the bogie frame and the vehicle body in the front-rear direction. It has a structure connected by a traction mechanism that regulates relative movement.

There is also a bogie described in Japanese Patent No. 2788047. This bogie is a two-axle bogie. The central portions of two front and rear axles are supported by a C-shaped link via bearing means with respect to the bogie frame, and the front and rear directions and left and right of the axle when the bogie is turned through a sand plate. It is configured to be able to slide in the direction.

[0006] Incidentally, since each of the trucks according to the prior art described above has a structure in which each of the trucks on which the left and right wheels are pivotally supported turns and travels on a curved road, the radius of rotation of the curved road is, for example, 30 m or less. When it becomes such a sharp curve,
There is a possibility that the wheels cannot follow and turn (steer) along the curved track. That is, in such a sharp curve, the left and right wheels of the truck need to be individually turned (steered) independently. A truck having such a structure is proposed in, for example, European Patent Publication No. 308720. .
In this bogie, a pair of wheels facing each other are supported by a pin (a kind of king pin) perpendicular to the inside of the bogie frame so as to be able to turn horizontally.

[0007]

However, the conventional DSB cart described above and the carts described in the above two publications and European Patent Publication have the following disadvantages.

That is, the height of the floor of the vehicle is 3
When applying to a low-floor tram with a size of only about 00 mm, the floor at the position where the bogie is to be placed needs to be considerably high, and unevenness occurs on the floor. In other words,
Not applicable to 100% low floor tram. Further, the bogie described in Japanese Patent No. 2788047 is a two-axle bogie, and each axle is of a rotary type and has a structure in which a central portion thereof is supported by bearing means. This is not suitable for a bogie to which the present invention is applied, which intends to omit the axle portion connecting the.

Further, in the bogie described in the above-mentioned European Patent Publication, a driving motor is mounted on a bogie frame, and a driving force is transmitted to wheels via a speed reducer mounted on the bogie frame.
As described above, since the wheels are configured to turn (steer) in the horizontal direction with respect to the bogie frame, it is necessary to use a complicated power transmission mechanism such as a constant velocity ball joint. Becomes very complicated.

The present invention has been made in view of the above points,
Suitable for 100% low-floor trams, simple structure and light weight, can prevent pitching, and wheels can smoothly turn along the track even on a sharp curved road with a minimum turning radius of 30 m or less. It is an object of the present invention to provide a single-axle bogie for traveling railway vehicles.

[0011]

According to the present invention, there is provided a single-axle bogie for a railway vehicle according to the present invention, which comprises: a) a wheel set inside a longitudinally intermediate position between a pair of left and right shaft beams via an axle; The shaft beams are rotatably mounted, and the respective shaft beams are rotatably pivotally connected at the distal ends thereof by laterally long links. B) The base end of the bogie frame is rotatably connected to the vehicle body in the vertical direction, and Under or near the distal end of the both-side beams, the respective beams are pivotally connected in the vicinity of the axle position of the wheels of the respective beams, and c) the base end side of each of the beams is horizontally and via a cross pin. The base link is pivotally connected to the distal end of the base link, and the base end of the base link is connected to the bogie frame so as to be horizontally rotatable; and d) each of the wheels is connected to the bogie frame by the shaft beam. It is constructed so that it pivots horizontally around the pivot joint It is characterized in.

According to the single-axle bogie having the above-described structure (claim 1), each of the left and right axle beams allows the vehicle to turn (steer) in a horizontal direction with respect to the vehicle body. As shown in the figure, the vehicle pivots horizontally around the pivot joints located near the axles of the wheels with respect to the bogie frame via the horizontally long link, and each wheel also pivots jointly with the pivoting of the beam. Turn horizontally around the center of rotation. In other words, the left and right wheels are mounted on the axle beams via the axle. However, since the left and right wheels are horizontally turned around the respective left and right pivot joints as rotation centers, for example, a curved road with a minimum turning radius of 30 m or less is used. In each case, each wheel runs while smoothly turning along the curve of the track (track).

Further, since the wheel is rotatably supported by a bearing or the like with respect to the shaft beam via the axle, the driving force is provided by a drive motor mounted on the shaft beam via a power transmission mechanism and a speed reducer. Therefore, the power transmission structure can be simplified unlike the bogie described in the above-mentioned European Patent Publication in which the wheels are rotatably mounted on the shaft beam.

Further, the base end of the bogie frame is pivotably connected to the vehicle body in the vertical direction, and the left and right shaft beams are pivotally connected to the bogie frame so as to be horizontally rotatable, and the base end side is connected to the bogie frame. On the other hand, crossing pins are used to connect the vehicle in the horizontal and vertical directions. This is advantageous from the viewpoint of the strength of the vehicle body underframe. In addition to the fact that each shaft beam bears the load at one location at the center of rotation, the use of a link on the base end side enables The load can be distributed to several places, and the load on the shaft beam can be reduced.

It is preferable that an axis spring is interposed between the axle beam and the front end of the bogie frame, and a pillow spring is interposed between the bogie frame and the vehicle body.

According to the suspension mechanism having this structure, since the base link is not inclined in the side view and the knee action suspension is constituted by the cross pin, the vertical support shaft and the horizontal support shaft, the suspension is provided on the tread surface of the wheel in the front-rear direction. The tangential force (specifically, powering or braking force) of the wheel, the shaft spring load and the like only slightly change under the influence of the acting force. No large pitching displacement occurs. In addition, since the vehicle body is swingably supported up and down by the two suspensions of the primary suspension using the shaft spring and the secondary suspension using the pillow spring, the riding comfort can be improved.

[0017] Further, a bogie frame in which a distal end of a base link is rotatably connected to a base end side of each of the shaft beams in a horizontal direction and a base end of the base link is rotatably connected to a vehicle body in a vertical direction. On the other hand, they can be pivotally connected in the horizontal and vertical directions via cross pins.

According to this configuration, the desired operation and effect can be achieved in the same manner as in each of the single-axle trucks.

It is preferable that a pivot connecting portion of the shaft beam to the bogie frame is configured to be relatively slidable in a vertical direction.

According to this configuration, relative displacement between the axle beam provided with the wheels and the bogie frame is allowed, so that the axle beam is supported so that the front end thereof can slide in the vertical direction with respect to the bogie frame. In the same manner as described above, even if a vertical tangential force (specifically, power running or braking force) acts on the tread surface of the wheel, Since the spring load changes only slightly, pitching is prevented and riding comfort is improved.

A part of each shaft beam is constituted by a driving motor, and a speed reducer can be integrated into a wheel mounting portion of the shaft beam.

According to this configuration, a part of the shaft beam can be formed by the casing of the driving motor and the casing of the speed reducer, so that the structure is simplified as compared with a case where the motor and the speed reducer are separately mounted on the shaft beam. Weight is reduced. Note that this configuration is limited to the drive train, and in the case of a non-drive train, the shaft beam is constituted only by the main structural members of the shaft beam.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a single-axle bogie for a railway vehicle according to the present invention is applied to a low-floor tram will be described below with reference to the drawings.

FIG. 1 is a side view showing a 100% low-floor type two-car connected vehicle to which a single-axle truck according to an embodiment of the present invention is applied, and FIG. 2 is a diagram to which a single-axle truck according to an embodiment of the present invention is applied.
It is a side view which shows a 00% low floor type single vehicle. FIG. 4 shows a single-axle bogie arranged at the left end of the vehicle shown in FIGS. 1 and 2 according to the embodiment of the present invention. FIG. 4 (a) is a plan view omitting the right half, and FIG. FIG. 4 (a) is a front view, and FIG.
4D is a sectional view taken along line dd of FIG. 4B. FIG. 5 is a plan view showing a state where the single-axle bogie of FIG. 4 has turned leftward.

As shown in FIGS. 1 and 2, each tram 1.1 ′ has a floor 3 that is 300 m from a rail 9 as a track.
100% low-floor type, located at a height of m or 330 mm, the bogies are all composed of uniaxial bogies 10, and the floor surface 3 is slightly narrower at the position of the uniaxial bogie 10, but is flat over the entire length of the vehicle body 2. It is composed of a natural floor.

As shown in FIG. 5, the single-axle bogie 10 includes a bogie frame 11, a shaft beam 12, an axle 13, wheels 14, and a plurality of links 15. The bogie frame 11 has a substantially U-shape in plan view, is substantially L-shaped when viewed from the side, and is formed to be concave downward when viewed from the rear.
The lower end of 1a is connected by a horizontal member 11b. The bogie frame 11 has a pair of side beams 11c above the vertical members 11a on both sides.
Are provided in parallel with each other, and connecting pieces 1 are provided on both sides of the rear end of the bogie frame 11.
Reference numerals 1d protrude rearward, respectively, and a connection frame 11d is connected to a bogie frame 11 by a horizontal support shaft 19a via a bracket 19 protruding downward from the lower surface of the vehicle body 2 so as to be pivotable in the vertical direction. .

The base ends 12a of the pair of shaft beams 12 are formed in an up-and-down bifurcated manner, and the distal end portion 12b of the shaft beam 12 is bent inward. It is pivotally connected by an orientation pin 15a. The vertical pin 18a of the cross pin 18 is straddled between the base bifurcated portions 12a of the shaft beam 12 so as to be pivotable in the horizontal direction. The distal end 16a is formed in a bifurcated left and right shape, and the proximal end 1 is formed.
6b is a base link 1 having a substantially pentagonal shape in plan view and extending upward.
6 between the forked portions 16a, the horizontal pin 18b of the cross pin 18
Are pivotally connected in the vertical direction, and the base link 16 is connected to the shaft beam 12 so as to be pivotable in the horizontal and vertical directions. Furthermore, the base end 16b of the base link 16
Both sides of the rear end of the bogie frame 11 are pivotally supported by a vertical support shaft 16c so as to be pivotable in the horizontal direction.

A short wheel 14 is rotatably supported via an axle 13 on the inner side of each shaft beam 12 at a position slightly forward of the intermediate position in the front-rear direction. In this example, the center portion of the wheel 14 is fixed to the axle 13 so as to be integrally rotatable, and each of the left and right axles 13 is rotatably supported by the corresponding shaft beam 12 via a bearing (not shown). In the case of the driving axle bogie of the present example, a gear as a reduction gear 20 such as a hypoid gear is integrally incorporated at a position of the axle 13 in the axle beam 12, and a part of the axle beam 12 is adjoined rearward. A driving motor 21 is provided, and the driving force from the driving motor 21 is reduced by the speed reducer 20 and transmitted to the axle 13 to rotate the wheels 14.

At the end of the bogie frame 11, a mounting hole 11e is provided vertically penetrating, and the vicinity of the position of the axle 13 of the shaft beam 12 in the mounting hole 11e is horizontally turned via a vertical pivot shaft 17. They are freely connected. The pivot 17 is shown in FIG.
As shown in (d), it is protruded upward from the shaft beam 12, and is connected to be vertically movable and horizontally pivotable via a sliding member 17a loaded in the mounting hole 11e. In this embodiment, the sliding member 17a has a structure in which metal members slidable in the vertical and horizontal directions are combined. However, the sliding member 17a may be an elastic body such as rubber that allows movement in all directions. .

Between a position slightly behind the axle 13 of the axle beam 12 and the bogie frame 11, an axle spring 22 made of an elastic material such as laminated rubber or a compression spring constituting a primary system suspension.
Is interposed. A pillow spring 23 made of an elastic body such as an air spring, a rubber spring, or a coil spring is disposed at a substantially middle position of the side beam 11c of the bogie frame 11 in the front-rear direction. This constitutes a secondary suspension.

The single-axle truck 10 of the present embodiment is constructed as described above. The right-hand end of the articulated vehicle 1 and the right-handed single-axle truck 10 'of the single vehicle 1 have the same longitudinal direction as the components of the single-axle truck 10. Only symmetrical arrangement is basically common. In addition, a single-axle bogie 10 ″ disposed at a connection point of the connection vehicle 1.
Can be used in common with the uniaxial carriage 10.

FIG. 5 shows a state in which the single-axle bogie 10 of the present embodiment has turned to the left relative to the vehicle body 2 (and bogie frame 11). The beams 12 respectively turn horizontally with respect to the bogie frame 11 integrally. At this time, the shaft beam 12 rotates counterclockwise (left side) around the pivot shaft 17 together with the wheel 14, and the base link 16 is connected to the vertical support shaft 16 at the rear end (base end).
Turn clockwise (right side) around c. The wheel 14 and the shaft beam 12 are inclined with respect to the bogie frame 11 because the front and rear ends thereof are supported by the base link 16 pivotally connected by a vertical pivot shaft 17 and a vertical pivot shaft 16c. Nothing.

As shown in FIG. 5, according to the single-axle bogie 10 of this embodiment, the left and right wheels 14 are respectively independently rotated about the pivot shaft 17 as the center of rotation along the curved line / straight line of the rail 9. Since the vehicle travels, the vehicle travels smoothly even on a sharp curve with a turning radius of 30 m or less.

FIGS. 6 and 7 show a single-axle bogie 10-2 according to a second embodiment of the present invention. FIG. 6 (a) is a plan view in a straight running state, and FIG. 6 (b) is a left side view thereof. , FIG.
(C) is a plan view showing a curved running state turning leftward,
FIG. 6D is a sectional view taken along line dd of FIG. 6B. FIG.
In this example, the uniaxial carriage 10-2 is the vehicle body 2 (and the bogie frame 1).
It is a top view showing the state where it turned to the left relatively to 1).

As shown in FIG. 6, the single-axle truck 10-
2 is different from the cart 10 according to the first embodiment described above in the following point. That is, the front and rear directions of the base link 16 are reversed, and the distal end of the base link 16 ′ is connected to the base bifurcated portion 12 a of the shaft beam 12 so as to be horizontally pivotable with a vertical support shaft 16 c. The base end 12b is connected to the rear end of the bogie frame 11 via a cross pin 18 so as to be pivotable in the vertical and horizontal directions. Other configurations and operations are the same as those in the case of the cart 10, so that common members are denoted by the same reference numerals and description thereof is omitted.

According to the single-axle truck 10-2 of this embodiment, when traveling on a sharp curve, as shown in FIG.
0-2 are the left and right wheels 14 with the pivot 17 as the center of rotation.
The shaft beam 12 and the bogie frame 11 respectively turn integrally and horizontally with respect to the bogie frame 11. At this time, the shaft beam 12 pivots counterclockwise (left side) about the pivot shaft 17 together with the wheel 14, and the base link 16 'is connected to the cross pin 1 at the rear end (base end).
8 in a clockwise direction (right side) around the vertical pin 18a. The wheel 14 and the shaft beam 12 are provided with a pivot shaft 17 and a vertical pin
Since it is supported by the base link 16 'pivotally connected by 8a, it does not tilt. As shown in FIG. 7, the single-axle bogie 10-2 of the present example travels while the left and right wheels 14 independently turn around the pivot shaft 17 as the center of rotation along the curves and straight lines of the rail 9, respectively. Therefore, the vehicle travels smoothly even on a sharp curve with a turning radius of 30 m or less.

FIG. 3 shows a partly fixed floor type two-car tram, in which the floor 3 at the front or rear (end) of the vehicle is higher than other parts. For this reason, the tram 1 "of this example is not limited to the above-described single-axle bogies 10 and 10-2 except for the bogie 10" of the connecting portion, and the left and right wheels 14 and 10
A conventional general bogie (not shown) in which 14 units are connected by an axle
Can be used.

Although the embodiment relating to the single-axle bogie of the present invention has been described above, the present invention is not limited to a low-floor tram, but is applicable to a general tram with a high floor and a railcar with a reduced weight. It goes without saying that you can do it.

[0039]

As is apparent from the above description,
The railcar single-axle bogie according to the present invention has the following excellent effects.

(1) Suitable for a 100% low-floor tram, applicable to articulated bogies, and has a simple and lightweight structure, can prevent pitching, and has a minimum turning radius of 30 m or less on a sharp curved road. Also, the wheels run while smoothly turning along the track.

(2) Each of the left and right wheels is mounted on a shaft beam via an axle. However, since each of the right and left wheels pivots horizontally with each of the left and right pivot joints as the center of rotation, for example, the minimum turning radius is 30 m. Even on the following curved roads, each wheel travels while smoothly turning along the curve of the track (track).

(3) Since the wheels are rotatably supported by a bearing or the like with respect to the shaft beam via the axle, the driving force is provided by a drive motor mounted on the shaft beam via a power transmission mechanism and a speed reducer. Since the power can be transmitted to the wheels, the power transmission structure can be simplified unlike the bogie described in the above-mentioned European Patent Publication in which the wheels are pivotally mounted on the shaft beam.

(4) The base end of the bogie frame is rotatably connected to the vehicle body in the vertical direction. Each of the left and right axle beams is pivotally connected to the bogie frame so as to be horizontally rotatable. Are connected in the horizontal and vertical directions by cross pins, especially in the case of a low-floor tram, compared with a case where the transfer of the force between the car body and the bogie frame is performed in one place of the car body, It can be performed in several places, which is advantageous from the viewpoint of the strength of the body frame. Also, since each shaft beam bears the load at one place at the center of rotation, it is connected by using a link on the base end side. The load can be distributed to two places, and the load on the shaft beam can be reduced.

(5) A shaft spring is interposed between the shaft beam and the front end of the bogie frame, and a pillow spring is interposed between the bogie frame and the vehicle body, thereby tilting the base link in a side view. And a knee action suspension with a cross pin, vertical support shaft, and horizontal support shaft is configured, so that even if a tangential force (specifically, power running or braking force) acts on the tread surface of the wheel in the front-rear direction, Since the shaft spring load and the like are only slightly changed by the influence of the acting force, the wheels and the axle members do not cause relatively large pitching displacement with respect to the vehicle body. In addition, since the vehicle body is swingably supported up and down by the two suspensions of the primary system suspension using the shaft spring and the secondary system suspension using the pillow spring, the riding comfort can be improved.

(6) A bogie frame or a vehicle body in which the distal end of a base link is connected to the base end side of each of the shaft beams so as to be horizontally pivotable, and the base end of the base link is vertically pivotably connected to the vehicle body. The desired operation and effect can be achieved in the same manner as in the case of each of the above-described single-axle bogies, by connecting to the horizontal and vertical directions freely via the cross pin.

(7) The pivotal connection of the shaft beam to the bogie frame is configured to be relatively slidable in the vertical direction, so that the relative displacement between the wheel beam-equipped beam and the bogie frame is allowed. Therefore, the shaft beam is supported so that the tip end side can swing vertically with respect to the bogie frame, and is allowed to move up and down under a certain drag by a spring member interposed similarly to the bogie frame. Even if a tangential force (specifically, powering or braking force) acts on the tread surface of the wheel in the front-rear direction, the spring load changes only slightly, so that pitching is prevented and riding comfort is improved.

(8) A part of each shaft beam is constituted by a driving motor, and a reduction gear is integrally incorporated into the wheel mounting portion of the shaft beam, so that the shaft of the driving motor casing and the reduction gear casing are formed. Can be formed, the structure is simplified and the weight is reduced as compared with a case where a motor and a speed reducer are separately mounted on the shaft beam. Note that this configuration is limited to a drive train, and in the case of a non-drive train, a shaft beam can be formed only by a beam member.

[Brief description of the drawings]

FIG. 1 is a perspective view of a single-axle bogie according to an embodiment of the present invention;
It is a side view which shows the connection vehicle of 0% low floor type two-car formation.

FIG. 2 is a diagram illustrating a single-axle bogie according to an embodiment of the present invention;
It is a side view which shows a 0% low floor type single vehicle.

FIG. 3 is a side view showing an articulated vehicle of a partially low-floor type two-car train in which a single-axle bogie according to an embodiment of the present invention is applied to a connecting portion.

FIG. 4 shows a single-axle bogie according to an embodiment of the present invention.
FIG. 4A is an enlarged plan view in which the right half is omitted, and FIG.
4C is a left side view, FIG. 4C is a rear view of FIG.
FIG. 4D is a sectional view taken along line dd of FIG.

FIG. 5 is a plan view showing a state in which the uniaxial bogie of FIG. 4 is turned to the left, in which a bogie frame is omitted.

6A and 6B show a single-axle bogie 10-2 according to a second embodiment of the present invention, wherein FIG. 6A is an enlarged plan view omitting a right half, FIG. 6B is a left side view, and FIG. 6C is a rear view of FIG. 6A, and FIG. 6D is a sectional view taken along line dd of FIG. 6B.

FIG. 7 is a plan view showing a state in which the uniaxial bogie 10-2 turns left relative to the vehicle body 2 (and bogie frame 11) in this example.

[Explanation of symbols]

 1.1 '1 "tram 2 body 3 floor 9 rail 10 10-2 single axle truck 11 bogie frame 12 axle beam 13 axle 14 wheels 15 horizontal link 16.16' base link 20 reducer 21 electric motor 22 axle Spring 23 pillow spring

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B61F 5/30 B61F 5/30 C (72) Inventor Koji Kadota 1-1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd.Akashi Factory (72) Inventor Yukinobu Kono 1-1, Kawasaki-cho, Akashi City, Hyogo Prefecture Kawasaki Heavy Industries, Ltd. Inside the Akashi Factory (72) Inventor Hirohide Matsushima 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries Inside the Akashi Factory, Ltd. Inside the Akashi Plant (72) Inventor Noboru Kobayashi 2-12-14 Wadayama Dori, Hyogo-ku, Kobe-shi, Hyogo

Claims (5)

[Claims] 1. A wheel is rotatably mounted on an inner side of an intermediate position of a pair of left and right shaft beams in the front-rear direction via an axle, and each of the shaft beams is rotatably supported at a leading end by a horizontally long link. The base end of the bogie frame is pivotably connected to the vehicle body in the vertical direction, and pivotally pivotable around the axle position of the wheel of each of the axle beams below or near the distal end of both side beams of the bogie frame. The base end of each shaft beam is connected to the distal end of the base link via a cross pin so as to be pivotable in the horizontal and vertical directions, and the base end of the base link is horizontal to the bogie frame. A single-axle bogie for a railway vehicle, wherein each of the wheels is rotatably connected, and each of the wheels is configured to pivot horizontally about a pivotal connection portion of the shaft beam to the bogie frame as a center of rotation. 2. The single-axle bogie for a railway vehicle according to claim 1, wherein a shaft spring is interposed between the axle beam and the front end of the bogie frame, and a pillow spring is interposed between the bogie frame and the vehicle body. 3. A bogie frame in which a distal end of a base link is connected to a base end side of each of the shaft beams so as to be pivotable in a horizontal direction, and a base end of the base link is connected to a vehicle body so as to be pivotable in a vertical direction. 3. The single-axle bogie for a railway vehicle according to claim 1 or 2, wherein the single-axle bogie is rotatably connected in a horizontal direction and a vertical direction via a cross pin. 4. The vehicle according to claim 1, wherein a pivot connecting portion of said shaft beam to said bogie frame is relatively slidable in a vertical direction.
3. The single-axle bogie for a railway vehicle according to any one of 3. 5. The single-axle bogie for a railway vehicle according to claim 1, wherein a part of each of said axle beams is constituted by a driving motor, and a reduction gear is integrally incorporated into a wheel mounting portion of said axle beam. .