JP2003231466A - Single axle bogie for rolling stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a single axle bogie for rolling stock suitable for a low floor type streetcar wherein an overall structure can be simplified, miniaturized and lightened even in a case of providing a driving part and attaching loose wheel parts provided with wheels movably mounted on a track to a bogie frame so that they can be steered, and the wheels can be smoothly steered even along a tightly curved railway with a small minimum turning radius. <P>SOLUTION: The loose wheel parts 5 provided with the rotatable wheels 5a on one ends of casings 6a are provided to horizontally turn on both sides of the bogie frame 2 via king pins 11. A plurality of support arms 16 is radially extended from the casings 6a of the loose wheel parts 5. A roller 19 is rotatably attached to each support arm 16 tip. Support plates 20 are respectively provided so as to protrude toward the rollers 19 from the bogie frame 2. Each loose wheel part 5 is composed to horizontally turn and not overturn by turnably supporting a corresponding roller 19 on a rolling contact 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 steer (horizontal turn). In other words, in such a sharp curve, the behavior that the wheels have an opposite attack angle with respect to the rail cannot be seen because the radius difference between the left and right wheels cannot be complemented only by the tread slope of the wheels. 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 supported horizontally inside a trolley frame via vertical pins (a kind of king pin) so as to be horizontally rotatable.

[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, so that the load on the track such as rails is enormous and easily damaged, which also 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. Therefore, the unsprung weight is large because it includes all the weight of the wheel axle, motors, speed reducers, and bogie frame members. For this reason, the vibration to the motor and the vibration load on the track are large, which adversely affects durability and riding comfort. Moreover, since the system steers the wheels, there are many link mechanisms including those for coupling the bogie frame and the vehicle body, and the structure is complicated.

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
Below) The purpose is to provide a uniaxial bogie for railway vehicles in which wheels smoothly steer along a track even on a sharply curved road.

[0011]

In order to achieve the above object, a uniaxial bogie for a railway vehicle according to the present invention (a non-driving bogie and a driving bogie) comprises an end of a bogie frame provided with an a) side beam portion. The other end is vertically swingably connected to the bottom of the car body via bogie frame beam pins, and an elastic body such as an air spring is provided between the car body and the bogie frame.b) Left and right side beam parts Below,
An independent wheel unit having rotatable wheels is provided at one end of the casing of the drive unit or the bearing unit so as to be horizontally rotatable via a kingpin, and c) a plurality of supports are provided from the casing of each of the left and right independent wheel units or the bogie frame. The parts are radially projected, and the rolling rollers are rotatably attached to the tips of the supporting parts, and d) the supporting plates are respectively projected from the bogie frame or the casing toward the rolling rollers at the ends of the supporting parts. Set up
It is characterized in that the corresponding rolling rollers are supported rotatably on the rolling surfaces of the respective support plates so that the independent wheel portions can be horizontally swiveled and do not fall. In the drive cart, the drive device is incorporated in the casing of the independent wheel portion as in the tenth aspect.

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 of (1) turn horizontally, for example, even on a curved road with a minimum turning radius of 30 m or less, each wheel smoothly steers along the curve of the rail (track). In particular, each independent wheel part can be freely swung by the rolling surface of the support plate projecting from the bogie frame or its casing, with rolling rollers provided at the tips of a plurality of support parts radially extending from the casing or bogie frame. Since it supports to prevent falling, it can smoothly turn 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 so as to be vertically swingable, and between the bogie frame (at least the other end thereof) and the vehicle body, respectively. Since an elastic body such as an air spring is provided, vibrations during traveling are absorbed by the elastic body. Furthermore, regardless of whether it is a drive cart or a non-drive cart, the independent wheel part is attached below the side beam part of the bogie frame, and the overall structure is simple, compact and lightweight, and so-called unsprung weight is reduced. The vibration received from the rail or other track is absorbed under the spring, the vibration transmitted to the vehicle body is reduced, and the load on the track 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 support parts and support plates with rolling rollers interposed, a bogie frame beam pin, and an elastic body. The overall structure is simple and the size and weight can be reduced.

According to a second aspect of the present invention, the kingpin receiving portion is provided downward on the lower surface of the side beam portion, and
It is preferable that a kingpin project upward from the upper surface of the casing of each of the independent wheel portions, and that each of the independent wheel portions is supported by the kingpin receiving portion via a bush and a thrust bearing so as to be horizontally rotatable.

According to another aspect of the present invention, in the uniaxial bogie for railway vehicles, 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 receiving portion on the side beam portion. It Moreover, the vertical load of the independent wheel portion is supported by the thrust bearing, and at the same time, the independent wheel portion is prevented from falling.

According to a third aspect of the present invention, an opening is provided downward on the lower surface of the side beam portion, and the kingpin receiving portion can be fitted into the opening via an elastic body such as urethane rubber.

According to the uniaxial bogie for railroad vehicles of the third aspect, even if an external force in any direction acts on the bogie frame, wheels, etc., the elasticity interposed between the kingpin receiving portion and the side beam opening. The body prevents the kingpin and thrust bearing from twisting.

According to a fourth 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 arranged such that the inner-gauge wheel is larger than the outer-gauge wheel. It is desirable that the tie rods be pivotally connected so that the steering can be performed greatly.

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

According to a fifth aspect of the present invention, a pair of upper and lower support links respectively form vertical parallel links between both sides of the base end vertical portion of the bogie frame and the vehicle body side vertical portion. And pivotally connect as described above, and allow relative lateral movement between the vehicle body and the bogie frame at the attachment portion of each support link,
A lateral movement stopper may be provided between the vehicle body and the bogie frame to regulate lateral movement within the allowable range within a predetermined range.

According to the uniaxial bogie for railroad vehicles of the fifth aspect, relative movement of the uniaxial bogie with respect to the vehicle body in the width (left and right) direction is possible, and the elastic body is interposed between the vehicle body and the uniaxial bogie. Lateral vibration of the vehicle body is reduced. further,
For example, it is possible to roll the left and right wheels.

According to a sixth aspect of the present invention, 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 railroad vehicles of the sixth aspect, since the side beam portions are formed on both sides in the width direction of the bogie frame, and the independent wheel portions are respectively arranged below them, the bogie frame is rotatable. Since a relatively large space is formed in the middle portion in the width direction of the vehicle, 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 placed can be lowered. Thus, a 100% low floor tram can be constructed.

According to a seventh aspect of the present invention, one end of a rod is pivotally connected to at least one end of a knuckle arm extending forward from the casing of the independent wheel portion, and an approximately V shape 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 desirable to keep the straightness of the wheels.

According to the seventh aspect of the present invention, the uniaxial bogie for the railway 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 inclination thereof causes 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 wheels largely, such as when passing through a sharp curve, the independent wheels are steered beyond the area of the cam, and the urging force of the restoring springs interferes with the turning of the wheels. There is nothing to do. 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.

[0026] As described in claim 8, a pair of front and rear support portions are projected from the upper portion of the casing of each independent wheel portion or the upper portion of each side beam portion of the bogie frame, and the pair of front and rear support portions are provided. Support plates are provided so as to project from the upper part or the upper part of the casing toward the lower ends of the respective support parts, and the rolling surfaces of the respective support plates are supported from below by the rolling rollers attached to the ends of the respective support parts. As a result, it is possible to prevent each of the independent wheel portions from falling over.

According to the uniaxial bogie for railroad vehicle of the eighth aspect, even when snow is accumulated on the track (track) during snow, there is a risk that the space between the rolling roller and the rolling surface of the support plate may freeze. The smooth steering of the independent wheel portion is maintained.

According to a ninth aspect of the present invention, it is preferable that a protrusion preventing protrusion is provided on the upper surface of each casing so as to face the lower surface of the side beam portion.

According to the uniaxial bogie for railroad vehicle of the ninth aspect, even if the rolling roller portion tries to float up due to the back lateral pressure momentarily acting on the independent wheel portion of the eighth aspect, the lifting is prevented. It is limited by the protrusion contacting the lower surface of the side beam portion.

According to a tenth aspect of the invention, the independent wheel portion can be composed of a direct drive motor (DDM) incorporated in the casing and a wheel directly connected to the drive shaft.

According to the uniaxial bogie for railroad vehicle of the tenth aspect, the structure is simplified and the weight is reduced by driving the vehicle with the wheels directly connected to the left and right motors.

According to the eleventh aspect of the present invention, the bogie frame comprises a pair of bogie frame beams of substantially "L" shape in a plan view by connecting the lateral beam end portion and the side beam portion end portion 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. It is desirable to do.

According to the uniaxial bogie for railroad vehicles of the eleventh aspect, the bogie frame is divided into two "L" -shaped bogie frame beams for the so-called track twisting due to irregularities of the left and right rails, and the pivot frame is pivotally supported. Since the torsional rigidity of the bogie frame is lowered by connecting or elastically connecting, so-called wheel load dropouts and wheel load fluctuations such as wheel lifting from the track can be minimized.

[0034]

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. 13 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. 13 according to an embodiment of the present invention. FIG. 1 (a) is a plan view in which the left 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. 13, 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 has independent 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 described above, side beam portions 4 having a U-shaped cross section are provided in parallel and integrally at intervals in the width (left and right) direction. As described above, the bogie frame 2 is formed by the lateral beams 3.3 and the side beam portions 4.4 into a rigid body having a substantially rectangular shape in a plan view, and an intermediate portion in the front-back (length) direction of the upper portion 4a of each side beam portion 4 is formed. 4b is formed in a wide shape by projecting inward 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
In addition, one of a pair of support links 7 is vertically attached with a bifurcated bracket 8a and a support shaft 8, and the other of the support links 7 is a base end side vertical portion of the side beam portion 4 of the uniaxial truck 1. A bifurcated bracket 8b and a support shaft 8 are pivotally attached to 4c. In addition, the support links 7 on the both sides are the front and rear support shafts 8 and 8.
On the other hand, the carriage frame 2 is supported so as to be allowed to move laterally by the lateral displacement in the left-right (width) direction or the inclination of the support link 7. 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. Further, the bottom surface 34b of the vehicle body 32 in the recess 34
And the both ends 3a of the lateral beam 3 between the pillow spring 10 including an elastic body such as laminated rubber, a compression spring, an air spring, or the like.
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. On the upper surface of the casing 6a, a kingpin 11 is provided so as to project upward as shown in FIG. 4A, and is fitted in a kingpin receiver 12 that is attached downward to the upper middle portion 4b of the side beam portion 4. The kingpin receiver 12 is configured by press-fitting a cylindrical bush 14 into an opening 13 provided downward in the upper middle portion 4b of the side beam portion 4, and a thrust bearing 15 is provided around the opening of the kingpin receiver 12. Is provided to hold the vertical load and rotatably support the king pin 11.

In this embodiment, 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 support shafts 18a. The connection relationship between the tie rods 18 and the left and right knuckle arms 17 is as follows.
When the left and right wheels 5a are steered to one side at the curved portion of the knuckle arm 17 such that the wheels 5a on the inner gauge side are slightly steered (turned) compared to the wheels 5a on the outer gauge side. The dimensions are set.

A rolling roller 19 is rotatably attached to the tip of each support arm 16. On the other hand, a supporting plate 20 is provided so as to project from the lower end portion of the lateral beam 3 toward the rolling roller 19, and the rolling roller 19 is provided on the rolling surface 20 a on the lower surface of the supporting plate 20.
Is attached. With this configuration, as shown in FIG. 3, the independent wheel portion 5 including the wheel 5a can turn about the kingpin 11, and the rolling surfaces 2 of the four support plates 20 can be rotated.
0a and the rolling roller 19 of the support arm 16 prevent the independent wheel portion 5 from falling, and the thrust bearing 15 supports the vertical load of the independent wheel portion 5. Further, it is possible to omit the thrust bearing 15 and to make the rolling roller 19 bear a vertical load.

Knuckle arm 17 of one independent wheel portion 5
3, one end of the rod 21a of the restoring device 21 is pivotally mounted on the tip side of the connection point (the support shaft 18a) with the tie rod 18 via the pivot pin 21c as shown in FIG. One end of the second rod 21b is connected to the other end of the rod 21a by the pivot pin 2
It is pivotally attached via 1d, and a cam portion 22 is integrally formed at an intermediate portion in the longitudinal direction of the second rod 21b. As shown in FIG. 5A, the cam portion 22 has a substantially V shape, and is orthogonal to the moving direction of the cam portion 22, and the cam follower 22 a.
Are urged toward the cam portion 22 by the restoring spring 22b. The strength of the restoring spring 22b is adjusted by the adjusting screw 22c.
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 such that an axial force acts on the rods 21a and 21b so as to maintain a neutral point as shown by a cam curve s indicating the relationship between the rod stroke and the rod reaction force in FIG. 5 (b). However, it is set so that 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. The cam portion 22 is housed in the cam case 23, and the second rods 21b slidably move in and out through the insertion holes 23a at both ends of the cam case 23.

The uniaxial bogie 1 according to the first embodiment of the present invention is constructed as described above. The trolley train 31 equipped with the uniaxial bogie 1 or the uniaxial bogie 1 operates as follows. That is, in FIGS. 1 to 3 and 13,
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 rail 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 smoothly steered along the curve of the rail 35.

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 rolling surfaces 20a of the four sets of supporting plates 20 and the rolling rollers 19 of the supporting arm 16, and in this example, the thrust bearing 15 is further used. The vertical load of the independent wheel portion 5 is supported. The thrust bearing 15 can be omitted.

Next, FIG. 4 (b) shows another embodiment of the structure for supporting the turning center of the independent wheel portion 5. The kingpin receiver 12 'of this embodiment has an opening provided downward in the upper middle portion 4b. A cylindrical elastic body (urethane rubber or the like) 24, which is integrally provided with an outer flange portion 24a around the lower end portion and has both upper and lower ends opened, is fitted in the inside 13. Then, a cylindrical kingpin receiver 12 ′ integrally provided with a flange portion 12 a outwardly around the lower end portion is opened at both upper and lower ends, and then the kingpin 11 is press-fitted into the kingpin receiver 12 ′ via the bush 14. The thrust bearing 15 is arranged around the opening of the kingpin receiver 12 'in common with the above-described embodiment. In the kingpin receiver 12 ′ of this example, the kingpin 11 and the thrust bearing 15 are prevented from being twisted when a relative external force acts between the bogie frame 2 and the independent wheel portion 5.

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 to the neutral point does not act on the restoring device 21. Have in common.

7 to 9 show a uniaxial truck according to another embodiment. FIG. 7 (a) is a plan view in which the left half is omitted,
7 (b) is a left side view, FIG. 8 is a front view of FIG. 7 (a),
FIG. 9 is a plan view showing a state in which the wheels of the uniaxial truck of FIG. 7A are steered to the right, with the left half omitted.

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 rolling plate 26a having a constant width is adhered to the outer peripheral edge of the lower surface of 6 to form the rolling surface of the rolling roller 19. On the other hand, in the bogie frame 2, as shown in FIG. 7B, when viewed from the side, the "U" -shaped side beam portion 4 is integrally disposed so as to straddle both ends of the front and rear lateral beams 3. The bracket 8e is provided so as to project from the base end vertical portion 4c of the side beam portion 4, and the bracket 3e is provided in the recess 34.
The brackets 8e are inserted into the bifurcated brackets 8d protruding from the vertical wall 34a on the base end side on both sides of 2, and are pivotally mounted by the bogie frame pins (support shafts) 8c. It is interposed between the lateral beam 3 on the front end side and the bottom surface 34b in the recess 34 via 10a.

A trapezoidal support arm (support portion) 27 extends from the upper part of the vertical portion 4c in front of and behind each side beam portion 4 toward the outer peripheral edge of the support plate 26, and a tip portion of the support arm 27. A rolling roller 19 is rotatably attached to the roller.
Each rolling roller 19 is affixed to the lower side of the rolling plate 26a, supports the front and rear sides of the independent wheel portion 5 from the bottom by the rolling rollers 19 so as to be horizontally rotatable, and has a kingpin receiver into which the kingpin 11 is fitted. The independent wheel portion 5 is supported by 12 so that it can be horizontally swung from above, so that the independent wheel portion 5 is supported at a total of three points. In the case of this example, the knuckle arm 17
As shown in FIG. 7 (a), is extended from the lower center of the casing 6a so as to be inclined toward the center of the front end side.

Further, in this example, the rolling roller 19 is
The pair of protrusions 28 for preventing the independent wheel portion 5 from being lifted up are provided on the front and rear support plates 26 in a relationship of being supported from below by the.
When the rolling roller 19 is about to float because the rear wheel lateral force acts on the independent wheel portion 5 and the protrusion 28 abuts on the upper and lower surfaces of the side beam portion 4, I try to prevent it. Since the other configurations are common to the uniaxial truck 1 of the above-described first embodiment, common components are designated by the same reference numerals and description thereof will be omitted. Further, a rubbing plate may be provided in a protruding manner instead of the protruding portion 28.

The uniaxial truck 1-2 according to the present embodiment constructed as described above has the following merits.
Rolling roller 19 for preventing the independent wheel portion 5 from falling
Also, since the rolling plate 26a and the rolling plate 26a are disposed above the wheels 5a, there is almost no possibility that the turning of the independent wheel portion 5 is hindered by freezing during snowfall. Since the fall prevention of the independent wheel portion 5 is achieved by supporting it at three points such as the king pin 11 forming the turning center and the pair of front and rear rolling rollers 19, the structure is simplified. Left and right pins 8c on the base side
By simplifying the pivot support structure and reducing the number of pillow springs 10 on the front end side to two, the buffer structure for swingably supporting the bogie frame 2 with respect to the vehicle body 32 is simplified. 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.

FIGS. 10 and 11 show a uniaxial truck according to still another embodiment of the present invention. FIG. 10 (a) is a plan view, FIG. 10 (b) is a left side view, and FIG. 11 is FIG.
It is a front view of (a).

As shown in FIGS. 10 and 11, the uniaxial bogie 1-3 according to the present embodiment pivotally connects the abutting ends of a pair of L-shaped bogie frame beams 2a by connecting pins 29. And constitutes a bogie frame 2 '. Specifically, a forked bracket 29a is provided so as to project from the vertical portion 4c of the side beam portion 4, and the width of the end portion 3c of the lateral beam 3 is narrowed to reduce the width of the bracket 29.
It is inserted into (a fork portion of) a and is pivotally connected by a connecting pin 29. The diagonally opposite ends of each bogie frame beam 2a are connected to the base end vertical wall 34a of the vehicle body 32 and the vehicle body 3
2 is pivotally attached to the support portion 36 on the front end side hung from the bottom surface 34b of the second embodiment by means of a bifurcated bracket 8d, a bracket 8e and a bogie frame beam pin (support shaft) 8f. A pillow spring 10 is provided between the frame beam 2a and the vicinity of the right angle portion and the bottom surface 34b of the vehicle body 32. 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 1-3 according to this embodiment constructed as described above has the following advantages.
In the uniaxial bogie 1-3 according to the present embodiment, the bogie frame 2'is divided into two, and the torsion rigidity of the bogie frame 2'is lowered against the irregularity of the left and right rails 33, that is, the twisting or the like.
It is possible to minimize the so-called wheel load fluctuation including the lifting of the wheel 5a from above and the like.

Instead of the pivoting / connecting structure by the connecting pin 29 of this embodiment, for example, a spherical bearing or a rubber bush may be interposed so as to be elastically coupled and deformable in response to torsion. it can.

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

The uniaxial bogie 1-4 according to the present embodiment is different from the uniaxial bogie 1-3 described above in that the basal frame of the trolley frame 2'is provided on both sides of the basal side vertical wall 34a of the vehicle body 32. This is because the pillow spring 10 is pivotally attached by the beam pin 8f, and the pillow spring 10 is provided between both sides on the front end side of the bogie frame beam 2'and the bottom surface 34b of the vehicle body 32, and other configurations are completely common.
The uniaxial bogie 1-4 of this example is provided with respect to the irregularity of the rail 35.
The uniaxial truck 1-3 is similar to the uniaxial truck 1-3 in that the so-called wheel load variation can be minimized.

By the way, although the so-called drive cart in which the independent wheel portion 5 is provided with the DDM 6 has been described in the above embodiment, it is needless to say that the present invention is also applicable to the case where the independent wheel portion 5 is not provided with the DDM 6, so-called idle wheel. Further, in the case of a drive cart, it is possible to use, instead of the DDM 6, an independent wheel portion 5 in which a reduction mechanism is integrally incorporated in a casing 6a together with a motor.

[0060]

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 side beam portions are formed on both sides in the width direction of the bogie frame, and independent wheel portions are respectively rotatably arranged under the side beam portions, a relatively large portion is formed in the middle portion of the bogie frame in the width direction. Since a space is formed, for example, when applied to the front and rear of a tram, the central portion of the floor surface before and after the vehicle body on which the uniaxial bogie is arranged can be lowered to 100
% Suitable for low-floor trams, applicable to both driven and non-driven trolleys, and has a small number of parts to simplify the overall structure, reduce size and weight, and steer on orbit. Since the independent wheel part with wheels is steerably attached to the bogie frame to reduce the so-called unsprung weight, the vibration received from the rail or other track is absorbed under the spring and the vibration transmitted to the vehicle body is reduced. And the burden on the orbit is reduced. Since the unsprung weight is reduced, the load on the track can be reduced. In addition, even on a steep curved road with a minimum turning radius of 30 m or less, the wheels smoothly turn along the railroad track.

(2) 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 receiving portion on the side beam portion, and the independent wheels are formed by the thrust bearings or rolling rollers. The vertical load of the section is supported, and at the same time, the independent wheel section is prevented from falling, so that the steering wheel is smoothly steered along the curve of the track.

(3) The restoring force of the restoring spring urges the cam portion integrated with the rod connected to the independent wheel portion via the cam follower, and the component force due to the gradient is extracted as the axial force of the rod. Since the independent wheel portion is held in the neutral position, that is, so as to face the straight traveling direction, 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 wheel largely when passing through a sharp curved road, the independent wheel portion is steered beyond the area of the cam portion, so that the biasing force of the restoring spring interferes with the turning of the wheel. Never come. 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.

(4) To prevent the independent wheel portions from falling over by arranging and supporting the rolling rollers and their supporting plates at the upper position of each independent wheel portion and the corresponding higher position of the bogie frame. In this way, even if there is snow on the track (track) during snowfall, there is no risk of freezing between the rolling surfaces of the rolling rollers and the support plate, and the smooth steering of the independent wheels is maintained. .

(5) By providing a protrusion for preventing floating on the upper surface of the independent wheel portion so as to face the lower surface of the side beam portion, the lateral pressure on the rear surface of the wheel temporarily acts to prevent the wheel from rolling over. Even if the moving roller tries to float, the floating is limited by the protrusion contacting the lower surface of the side beam portion.

(6) The independent wheel portion is composed of a direct drive motor (DDM) incorporated in the casing and wheels directly connected to the drive shaft, and the vehicle is driven by the wheels directly connected to the left and right motors. The structure is simplified and the weight is reduced.

(7) The bogie frame is divided into a pair of bogie frame beams, the ends of the bogie frame beams are butted and combined in a rectangular shape, and the butted ends are pivotally connected to each other via a connecting pin. Alternatively, since the torsional rigidity of the bogie frame is lowered by elastically coupling through a spherical bearing or a rubber bush, it is possible to minimize fluctuations in wheel load due to so-called irregularities such as twisting of the track. .

(8) The left and right steering knuckle arms are pivotally connected to each other by tie rods such that they are tilted so that the wheels on the inner gauge side can be steered more than the wheels on the outer gauge side. Since the rotation angle (steering angle) of the wheel almost matches the curvature of the track on the curved section, it is prevented that a large pressing force acts on the outer track side, so that it smoothly follows the curved section of the track. Turn.

[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 left 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 showing the relationship between rod stroke and rod reaction force of (a).

7 to 9 show a uniaxial truck according to another embodiment, and FIG. 7 (a) is a plan view in which the left half is omitted.
(B) is a left side view.

FIG. 8 is a front view showing the uniaxial truck of FIG. 7 (a).

FIG. 9 is a plan view showing a state in which the wheels of the uniaxial truck of FIG. 7 (a) are steered to the right, with the left half omitted.

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

FIG. 11 is a front view showing the uniaxial truck of FIG. 10 (a).

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 is a diagram showing a case where the uniaxial truck according to the 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] 1-1-3 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 spindles 8c Bogie frame pin (support shaft) 8f bogie frame beam pin (support shaft) 9 stopper 10 pillow spring 11 Kingpin 12 Kingpin receiver 13 openings 14 Bush 15 Thrust bearing 16 ・ 27 Support arm (support part) 17 Knuckle arm 18 tie rod 19 Rolling roller 20 ・ 26 Support plate 20a Rolling surface 21 Restoration device 22 Cam section 22a cam follower 22b restoration spring 26a rolling plate 28 Protrusion (rubbing plate) 29 connecting pin 31 tram 32 car body 33 floor 34 recess 34a Base-side vertical wall 35 rails 36 Support

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 12, 2002 (2002.2.1
2)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

In order to achieve the above object, a uniaxial bogie for a railway vehicle according to the present invention (a non-driving bogie and a driving bogie) comprises an end of a bogie frame provided with an a) side beam portion. The other end is vertically swingably connected to the bottom of the vehicle body through a support shaft such as a bogie frame beam pin, and an elastic body such as an air spring is provided between the car body and the bogie frame. Below the side beam portion, an independent wheel portion provided with a rotatable wheel at one end of a casing of a drive portion or a bearing portion is provided so as to be horizontally rotatable via a king pin, and c) a casing of each of the left and right independent wheel portions. Or, a plurality of supporting portions are radially projected from the bogie frame, and rolling rollers are rotatably attached to the tips of the respective supporting portions, and d) rolling rollers at the tip of each supporting portion from the bogie frame or the casing. Each support plate protruding toward the Characterized by being configured so that the not horizontally pivotably and fall each independent wheel portion by pivotably supporting the corresponding rolling roller on the rolling surface. In the drive cart, the drive device is incorporated in the casing of the independent wheel portion as in the tenth aspect.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

At least one end of the bogie frame is swingably connected to the bottom of the vehicle body in the vertical direction via a bogie frame beam pin (support shaft) , and the bogie frame (at least the other end thereof) and the vehicle body are connected to each other. Since an elastic body such as an air spring is provided between them, vibrations during traveling are absorbed by the elastic body. Furthermore, regardless of whether it is a drive cart or a non-drive cart, the independent wheel part is attached below the side beam part of the bogie frame, and the overall structure is simple, compact and lightweight, and so-called unsprung weight is reduced. The vibration received from the rail or other track is absorbed under the spring, the vibration transmitted to the vehicle body is reduced, and the load on the track 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 support parts and support plates with rolling rollers interposed, a bogie frame beam pin, and an elastic body. The overall structure is simple and the size and weight can be reduced.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shuji Akashi             2-1-1 Wadayama-dori, Hyogo-ku, Kobe-shi, Hyogo             Kawasaki Heavy Industries, Ltd. Hyogo Factory (72) Inventor Junichi Terai             2-1-1 Wadayama-dori, Hyogo-ku, Kobe-shi, Hyogo             Kawasaki Heavy Industries, Ltd. Hyogo Factory (72) Inventor Shinya Matsuki             2-1-1 Wadayama-dori, Hyogo-ku, Kobe-shi, Hyogo             Kawasaki Heavy Industries, Ltd. Hyogo Factory (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. (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 Noboru Kobayashi             2-12-14 River Wadayama-dori, Kobe-shi, Hyogo             Heavy Vehicle Engineering Co., Ltd.

Claims (11)

[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 elastic body is provided, and below each of the left and right side beam portions, an independent wheel portion provided with a rotatable wheel at one end of the casing of the drive portion or the bearing portion is provided so as to be horizontally rotatable via a kingpin, A plurality of supporting parts are radially projected from the casing of each of the left and right independent wheel parts or the bogie frame, and rolling rollers are rotatably attached to the tip of each supporting part, and the bogie frame or the casing is used to Supporting plates are provided so as to project toward the rolling rollers at the tips of the supporting parts, and the corresponding rolling rollers are rotatably supported on the rolling surfaces of the respective supporting plates so that the independent wheel parts can be horizontally swung. And configured to not fall Uniaxial bogie for a railway vehicle, wherein the door. 2. A kingpin receiving portion is provided downward on a lower surface of the side beam portion, and a kingpin is projected upward from a casing upper surface of each independent wheel portion so that the kingpin receiving portion is provided with a bush and a thrust bearing. The uniaxial bogie for a railway vehicle according to claim 1, wherein each of the independent wheel portions is supported so as to be horizontally rotatable. 3. The opening is provided downward on the lower surface of the side beam portion, and the kingpin receiving portion is fitted in the opening through an elastic body such as urethane rubber. Uniaxial bogie for railway vehicles. 4. 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-rail side wheels more than the outer-rail side wheels. The uniaxial bogie for a railway vehicle according to any one of claims 1 to 3, wherein the uniaxial bogie is pivotally connected by a tie rod. 5. A pair of upper and lower support links pivotally connect both sides of the base end side vertical portion of the bogie frame and the vehicle body side vertical portion so as to form vertical parallel links. At the same time, a lateral movement stopper is provided between the vehicle body and the bogie frame to allow relative lateral movement between the vehicle body and the bogie frame at the mounting portion of each of the support links, and to regulate the lateral movement within the allowable range within a predetermined range. The uniaxial bogie for railway vehicles according to any one of claims 1 to 4, wherein 6. The dolly frame is a pair of front and rear lateral beams arranged in parallel with a space therebetween, and is integrally provided over both sides of the lateral beams and is integrally formed on both sides of the lateral beam with the opening facing downward. 6. The railway according to any one of claims 1 to 5, 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. 7. A substantially V-shape integrally provided on one end of a rod is pivotally connected to at least one end of a knuckle arm extending forward from the 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, and the cam follower is urged in a direction orthogonal to the independent direction through a restoring spring. The uniaxial bogie for railway vehicles according to claim 4, wherein the straightness of the wheel portion is maintained. 8. A pair of front and rear support portions are projected from the upper portion of the casing of each independent wheel portion or the upper portion of each side beam portion of the bogie frame, and from the upper portion of each side beam portion or the upper portion of the casing. Each of the independent wheel portions is provided by projecting a support plate toward the lower end of each of the support portions, and supporting the rolling surface of each of the support plates from below by a rolling roller attached to the tip of each of the support portions. The uniaxial bogie for railway vehicles according to claim 2, characterized in that it does not fall over. 9. The uniaxial bogie for a railway vehicle according to claim 8, wherein a rising prevention protrusion is provided on the upper surface of each casing so as to face the lower surface of the side beam portion. 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. A pair of bogie frames of substantially "L" shape in plan view are formed by connecting the bogie frames to each other at right angles to the lateral beam end and the side beam part end, and these bogie frames are 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. The uniaxial bogie for railway vehicles according to any one of claims 1 to 10.