JP3529741B2 - Driving device for bogies for railway vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
In particular, the present invention relates to a drive device for a bogie suitable for a low-floor tram, and is not limited to a single-axle bogie having a pair of left and right wheels, but also a drive device for each wheel of a bogie having a plurality of left and right wheel sets.

[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.

By the way, when a motor and a speed reducer, which constitute a drive device for each wheel of a bogie of this type, are fixedly (rigidly) attached to the bogie frame together with the wheels, vibration of the wheels during traveling is directly caused by the bogie. Since it is transmitted to the frame, the riding comfort becomes poor. Therefore, in general, a method in which a shaft spring is provided between the bogie frame and the support portion of the wheel and the vibration of the wheel is absorbed by the shaft spring is often used. According to this method, a part of the vibration of the wheel is absorbed by the shaft spring, so that the riding comfort is considerably improved. However, when this method is carried out, if a motor and a speed reducer are attached together with the wheel to the support portion of the wheel supported by the shaft spring, the so-called unsprung load becomes heavy and the riding comfort deteriorates.

Therefore, it is desirable to support at least the motor on the bogie frame so that the motor is removed from the unsprung load, but in this case, relative displacement occurs between the bogie frame and the wheels. Even if such relative displacement occurs, it is necessary to ensure that the driving force of the motor is transmitted to the wheels.

A prior art relating to a drive device for a truck equipped with such a drive system is disclosed in, for example, Japanese Patent Laid-Open No. 2001-104.
There is an apparatus described in JP-A-88. In this device, a motor is arranged around the same axle as a wheel axle, and a reducer for decelerating the rotational force of the hollow drive shaft of the motor to transmit it to the wheel is provided. A structure in which one end of a transmission shaft passing through the inside and the deceleration output shaft of the speed reducer are connected via a first flexible joint, and the other end of the transmission shaft and the wheel are connected via a second flexible joint. Is equipped with. As a result, the relative displacement of the wheels during traveling can be absorbed as a deviation in the angle of the shaft center between the transmission shaft and the deceleration output shaft or between the transmission shaft and the axle.

[0006]

However, the drive device described in the above publication has the following disadvantages. That is, as described above, in addition to the motor and the speed reducer, flexible joints are required on both sides of the transmission shaft, and since two flexible joints are used, the structure becomes complicated and the weight of the entire trolley may be excessive. is there.

The present invention has been made in view of the above points, and absorbs a relative displacement between a drive unit such as a motor mounted on the bogie frame side or a speed reducer and a wheel to drive the drive force from the drive unit. An object of the present invention is to provide a bogie drive device for a railway vehicle that can be reliably transmitted to wheels, has a simple structure, and can reduce the weight of the entire device.

[0008]

In order to achieve the above-mentioned object, in a drive device for a railway bogie according to the present invention, a supporting portion for rotatably supporting left and right wheels is provided on a bogie frame via a shaft spring. A drive device for a rail car bogie, in which the wheels are driven by a driving unit such as a motor supported by the bogie frame via a speed reducer integrally provided with each wheel, the axle of the wheel. The drive means is arranged around the same axis as, and the drive shaft at the center of the drive means is hollow,
The hollow drive shaft is inserted through the conductive shaft so as to be freely tilted, and one end of the hollow drive shaft is connected to the end of the conductive shaft opposite to the wheel via a flexible shaft joint.
A planetary speed reducer is used as the speed reducer, and the wheel-side end of the transmission shaft is integrally rotatably connected to the sun gear, and the sun gear, a satellite gear that meshes with the sun gear, or each satellite gear meshes with the sun gear. One of the internal gears is a gear with crowning, and the sun gear is configured to be tiltable with respect to the satellite gear or the internal gear.

According to the trolley vehicle drive device having the above-mentioned structure, the driving force of the drive means is transmitted to the hollow drive shaft, the flexible shaft coupling, and the transmission shaft in this order, and the transmission shaft transmits the sun to the speed reducer. The railway vehicle equipped with the carriage travels by being transmitted to the gears, further transmitted from the sun gears to the satellite gears to be decelerated, and the wheels rotating together with the satellite gears or the internal gears meshing with the satellite gears.

During such traveling, a relatively large relative displacement may occur in the up-down direction and the front-rear direction between the drive means on the bogie frame side and the wheel (support portion thereof). The sun gear of the speed reducer, which is integrally provided with the sun gear, is tiltable with respect to the satellite gear or the internal gear, and the other end of the transmission shaft whose one end is connected to the sun gear so as to rotate integrally is the hollow drive shaft of the motor. Since it is connected to the flexible shaft joint so as to be tiltable in all directions, it is absorbed by tilting the conductive shaft having a sufficient length, and the displacement of the conductive shaft in the axial direction is within a relatively small range. Be absorbed. Incidentally. Even if the sun gear or satellite gear of the planetary speed reducer is configured to be tiltable as described above, at least two types of gears of the sun gear, the satellite gear, and the internal gear are fixed in the axial center position. Since the axial center positions of the remaining gears are also fixed at fixed positions by the other gears, the axial distance between the gears is kept constant and smooth transmission of the driving force is achieved.

According to a second aspect of the present invention, a supporting portion for rotatably supporting the left and right wheels is supported by the bogie frame via a shaft spring, and is driven by a driving means such as a motor supported by the bogie frame. a driving device of the carriage for railway vehicles in which the wheels are driven through a supported reducer to the truck frame,
The drive means is arranged around the same axle as the axle of the wheel, the drive shaft at the center of the drive means is hollow, and the conductive shaft is inserted through the hollow drive shaft so as to be freely tiltable. A planetary speed reducer is used as the speed reducer, one end of the hollow drive shaft is integrally rotatably connected to a sun gear of the speed reducer, and rotatably connected to a satellite gear that meshes with the sun gear via a bearing. While integrally connecting one end of the transmission shaft to the support arm, the other end of the transmission shaft is connected to the axle of the wheel via a flexible shaft joint, and the sun gear and the internal gear or the satellite gear is connected. It is characterized in that it is a gear with crowning, and the satellite gear is configured to be tiltable with respect to the sun gear and the internal gear that mesh with the gear.

According to the second aspect of the present invention, the driving force of the driving means (for example, a motor) is transmitted to the hollow drive shaft and the sun gear of the speed reducer, and further transmitted from the sun gear to the satellite gear to reduce the speed. , The satellite gears are transmitted to the transmission shaft, the flexible shaft coupling, and the wheels through the support arms, and the wheels rotate together with the transmission shaft, so that the railway vehicle equipped with the bogie runs.

During such traveling, a relatively large relative displacement may occur in the up-down direction and the front-rear direction between the drive means and the speed reducer on the bogie frame side and the wheels (support portions thereof). Such relative displacement allows the satellite gear of the speed reducer to which one end of the transmission shaft is connected to be tilted with respect to other gears, absorbs the angular deviation between the central axis of the reduction gear and the transmission shaft, and On the end side, a flexible shaft joint is provided so that it can be tilted in all directions with the wheel, and since the transmission shaft has a sufficient length, the relative displacement with the wheel can be prevented by tilting the transmission shaft. While absorbing, the driving force of the driving means is decelerated and reliably transmitted to the wheels. Incidentally. Even if the sun gear or satellite gear of the planetary speed reducer is configured to be tiltable as described above, at least two types of gears of the sun gear, the satellite gear, and the internal gear are fixed in the axial center position. Since the axial center position of the remaining gears is fixed at a fixed position by the other gears, the distance between the gears is kept constant, and smooth transmission of the driving force is achieved. It is similar to the case of.

According to a third aspect of the present invention, a supporting portion for rotatably supporting the left and right wheels is supported by the bogie frame via a shaft spring, and is driven by a driving means such as a motor supported by the bogie frame. a driving device of the carriage for railway vehicles in which the wheels are driven through a supported reducer to the truck frame,
The drive means is arranged around the same axle as the axle of the wheel, the drive shaft at the center of the drive means is hollow, and the conductive shaft is inserted through the hollow drive shaft so as to be freely tiltable. A planetary speed reducer is used as the speed reducer, one end of the hollow drive shaft is integrally rotatably connected to a sun gear of the speed reducer, and rotatably connected to a satellite gear that meshes with the sun gear via a bearing. While integrally connecting one end of the transmission shaft to the support arm, the other end of the transmission shaft is connected to the axle of the wheel via a flexible shaft joint, and the support arm is relative to the bearing portion of the satellite gear. It is characterized in that it is connected so as to be tiltable in all directions with an elastic body such as a rubber bush interposed.

Since the driving device described in claim 3 has the same basic structure as that of the driving device according to claim 2, similarly, the driving force of the driving means (for example, the motor) is the hollow driving shaft and the sun of the speed reducer. It is transmitted to the gears, further transmitted from the sun gears to the satellite gears, decelerated, transmitted from the satellite gears to the transmission shaft, the flexible shaft coupling, and the wheels through the support arms, and the wheels rotate together with the transmission shafts, so that the cart is moved. The equipped rail car is run.

On the other hand, the relative displacement that may occur between the drive means on the bogie frame side and the speed reducer and the wheels (supporting parts thereof) during traveling is due to the satellite gear of the speed reducer to which one end of the transmission shaft is connected. It is supported so that it does not tilt with respect to other gears, but because the elastic body such as a rubber bush deforms with respect to the bearing portion of the satellite gear and allows the tilt of the conduction shaft connected to the support arm, The angle deviation between the center shaft of the reduction gear and the transmission shaft can be absorbed, and the relative displacement between the transmission shaft and the wheel is absorbed due to the inclination of the transmission shaft. To do. Incidentally. Even if the sun gear or satellite gear of the planetary speed reducer is configured to be tiltable as described above, at least two types of gears of the sun gear, the satellite gear, and the internal gear are fixed in the axial center position. Since the axial center position of the remaining gears is fixed at a fixed position by the other gears, the distance between the gears is kept constant and smooth transmission of the driving force is achieved. 1. The same as the case of claim 2.

According to a fourth aspect of the present invention, a supporting portion for rotatably supporting each of the left and right wheels is supported by the bogie frame via a shaft spring, and is driven by a driving means such as a motor supported by the bogie frame. A drive device for a rail car bogie in which the wheels are driven via a speed reducer provided integrally with each of the wheels, wherein the drive means is arranged around the same axle as the wheel axle, While meshed, one is the sun gear,
On the other hand, a double pinion type planetary gear having at least one pair of satellite gears, which are respectively meshed with the internal gears and whose distances between the gears are kept constant via inter-shaft holding arms, is used for the speed reducer. The one end of the drive shaft of the drive means is connected to the sun gear of the speed reducer so as to be integrally rotatable, and the internal gear of the speed reducer is integrally rotatable with respect to the wheel.

According to the driving device of the fourth aspect, the driving force of the driving means is transmitted to the sun gear by the drive shaft, and is transmitted to the sun gear side satellite gear and the internal gear side satellite gear.
It is decelerated and transmitted to the wheels integrated with it through the internal gear, and the wheels rotate, so that the railway vehicle equipped with the truck runs. On the other hand, at the time of traveling, relative displacement may occur between the drive means on the bogie frame side and the wheels and the speed reducer. This relative displacement causes the eccentricity of the axial center of the internal gear to the arm core of the sun gear. Since the satellite gear that meshes with the gear side maintains the meshed state and moves in the circumferential direction with respect to the satellite gear that meshes with the sun gear, it is sufficiently absorbed.

According to a fifth aspect of the present invention, in the bogie drive device for a railway vehicle according to the fourth aspect, the center portion of the satellite gear that meshes with the sun gear of the double pinion type planetary gear is provided with an inter-axis holding arm. And rotatably supporting the center portion of the sun gear via bearings and the center portions of the pair of mutually meshing satellite gears are rotatably supported via inter-axis holding arms and bearings, respectively. One end of the inter-axle holding arm is rotatably supported by a bearing at the center of the satellite gear that meshes with the internal gear, and an annular rail is projected on the outer surface of the internal gear, and this rail is held between the inter-axle holding arms. Can be movably clamped along the rail between a pair of rollers mounted on the other end side of the roller at intervals in the radial direction.

According to the drive device of the fifth aspect, the drive shaft is rotated by the drive means, and the sun gear integrated with the drive shaft is rotated, so that the satellite gear meshing with the sun gear rotates and meshes therewith. The other satellite gear rotates to rotate the internal gear that meshes with each other, and the wheels that are integral with the internal gear rotate to drive the uniaxial bogie. At this time,
The satellite gear that meshes with the internal gear is always kept in mesh with the internal gear via an inter-axis holding arm that is guided by an annular rail, and the drive force of the drive means is reduced to ensure that Transmitted. Further, the relative displacement between the drive means and the wheels is such that the angle θ connecting the centers of both gears of the satellite gear meshing with the sun gear changes, and the axis of the sun gear integrated with the drive shaft of the drive means (center). On the other hand, the eccentricity (w in FIG. 10) of the shaft center (center) of the internal gear integrated with the wheel is allowed and absorbed.

In the drive unit for a bogie for a railway vehicle according to any one of claims 1 to 4, the supporting portion for supporting the wheels is a shaft beam, and the shaft beam has a tip end side connected by a link. If the base end side of each shaft beam is connected to the bogie frame so as to be pivotable in the vertical and horizontal directions, the left and right shaft beams that support the wheels are vertical and horizontal with respect to the bogie frame. Since it is supported rotatably in the direction via a shaft spring and the vibrations of the wheels are not directly transmitted to the bogie frame, the ride is comfortable. Moreover, since at least the driving means is not supported by the shaft beam supported via the shaft spring, and the unsprung load is reduced, the riding comfort is also improved from that point.

In the drive unit for a railway vehicle bogie according to claim 1, the planetary gear as the speed reducer is a planetary type planetary gear, and an internal gear is integrally provided on a support portion of the wheel. A satellite gear that meshes with the internal gear is supported so that the wheel can rotate and revolve through a bearing, and one end of the transmission shaft is integrally rotatably connected to the sun gear to be rotated by the drive means. If the wheels are driven, the sun gear of the planetary gears is rotated by the drive means via the hollow drive shaft and the transmission shaft, and the satellite gears meshing with the sun gears are revolved while revolving around the sun gears, thereby being integrated with the satellite gears. The wheels rotate and the uniaxial truck travels. The relative displacement between the drive means and the wheels is absorbed by the sun gear being tiltable in all directions with respect to the satellite gear and the long transmission shaft being tilted as described above.

Further, in the drive unit for a railway vehicle bogie according to claim 1, the planetary gear as the speed reducer is a star type planetary gear, and an internal gear is rotatably supported with respect to a support portion of the wheel. A sun in which the internal gear is connected to the wheel so as to rotate integrally, and a satellite gear that meshes with the internal gear is rotatably supported at a fixed position, and one end of the transmission shaft is connected to rotate integrally. When the gear is rotated by the driving means to drive the wheels, the sun gear of the planetary gear is rotated by the driving means through the hollow drive shaft and the transmission shaft, and the satellite gear that meshes with the sun gear is rotated. The internal gear rotates, the wheels rotate integrally with the internal gear, and the railway vehicle equipped with the carriage travels. The relative displacement between the drive means and the wheels is absorbed by the sun gear being tiltable in all directions with respect to the internal gear and the long transmission shaft being tilted as described above.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a drive device for a bogie for a railway vehicle according to the present invention will be described below with reference to the drawings. 1 and 2 show a drive device for a single-axle bogie according to an embodiment of the present invention. FIG. 1 shows a 100% low floor type two-car train connecting vehicle, and FIG. 2 shows an embodiment of the present invention. 1 shows a uniaxial truck equipped with a drive device.

As shown in FIG. 1, each tram 1 has a floor 3
Is 300 mm or 330 from rail 9 as a track
It is a 100% low-floor type, which is located at a height of mm, and the bogies are all uniaxial bogies 10. The floor surface 3 has a slightly narrow width at the position of the uniaxial bogies 10, but a flat floor over the entire length of the vehicle body 2. It is composed of faces. In this example, the front and rear uniaxial trolleys 10 are provided with the drive device, and the uniaxial trolley 10 at the central connecting portion is provided.
Is a non-driving carriage.

As shown in FIG. 2, the uniaxial bogie 10 includes a bogie frame 11, an axle beam 12, an axle 13, wheels 14, and a plurality of links 15 and 16. The bogie frame 11 has a substantially "U" shape in plan view, and is substantially L-shaped when viewed from the side. In order to allow the bogie frame 11 to swing in the width direction, a pair of left and right brackets 26 are provided so as to project downward on the bottom surface of the vehicle body 2, and the upper ends of the suspension links 25 are attached to these brackets 26 so that the pivot shaft 2 in the front-rear direction extends.
The lower end of the suspension link 25 is connected to the rear end of the bogie frame 11 by the 5a so as to be swingable in the width direction.
It is pivotally connected by 5b so as to be swingable in the width (left and right) direction. Further, a pair of left and right brackets 28 project forward from the bottom front surface of the vehicle body 2 behind the bogie frame 11, and a rear end of the radius rod 27 is connected to these brackets 28 by a pivot shaft 27b in the width direction. Radius rod 27
The front end of is connected to the rear end of the bogie frame 11 by a pivot shaft 27a in the width direction.

Further, the pair of shaft beams 12 arranged below the bogie frame 11 are formed such that the base end sides 12a thereof are formed into a bifurcated shape, and the tip ends 12b of the shaft beams 12 are bent inward. Both ends of the horizontally long link 15 are pivotally connected to each other between the distal end bent portions 12b of the pair of shaft beams 12 by vertically oriented pins 15a. Further, the base end bifurcated portion 12 of the shaft beam 12
Between a, the tip side of the base link 16 of a substantially pentagonal shape in plan view, in which the tip portion 16a is squeezed into a triangular shape in a plan view and the base end portion 16b is formed in a bifurcated right and left and is extended upward,
It is connected by a vertically oriented pivot shaft 17 so as to be horizontally rotatable. In addition, the horizontal pin 18b of the cross pin 18 is straddled between the base end bifurcated portions 16b of the base link 16 so as to be vertically swingable, and the vertical pin 18a is horizontally swung across the recessed portion 11c of the bogie frame 11. Connected as possible. The shaft beam 1
The front end side of 2 is connected to the bogie frame 11 via a link (not shown) parallel to the axle 13 of the wheel 14.

As shown in FIG. 2A, the axle 13 is integrally rotatably fixed to the center of the wheel 14, and the axle 13 is interposed between bearings (not shown) in the middle of the left and right axle beams 12 in the front-rear direction. It is rotatably supported inward slightly to the front. In the case of the drive cart of this example, a speed reducer 20 such as a planetary gear is integrally incorporated at the position of the axle 13 in the shaft beam 12, and a wheel motor 21 as a driving means is installed in the shaft beam 12 of the speed reducer 20. It is incorporated on the outside of the bogie frame 11 side. With this configuration, the driving force from the motor 21 is reduced by the speed reducer 20 and transmitted to the axle 13, and the wheels 14 rotate.

As shown in FIG. 2B, the front end 11a of the bogie frame 11 extends forward to almost the same position as the front end bent portion 12b of the shaft beam 12, and the front end 11a and the front end of the shaft beam 12 are extended. A shaft spring 22 made of an elastic material such as laminated rubber or a compression spring that constitutes the primary suspension is interposed between the bent portion 12b and the bent portion 12b. Further, a pillow spring 23 made of an elastic body such as an air spring, a rubber spring, or a coil spring is arranged almost at an intermediate position in the front-rear direction of the bogie frame 11, and the body 2 is supported on the pillow spring 23 to support the secondary system suspension. Are configured.

FIG. 3 shows another embodiment of the drive unit 5 for the uniaxial truck 10. As shown in FIG.
Reference numeral 4 denotes a sideways cylindrical housing body 14a having an open outer end.
Axial beam 1 that is integrally formed around the outer end of the
It is rotatably mounted on the outer peripheral surface of the second cylindrical protruding portion 31 via an annular bearing 34. The shaft beam 12 includes, in addition to the cylindrical protrusion 31, a main body 30 extending in the front-rear direction on the opposite side, and one end (rear end) of the main body 30 laterally pivots on the bogie frame 11. It is rotatably connected in the vertical direction via a shaft 32. Further, on the front end side of the shaft beam 12, a shaft spring 22 is provided between the shaft beam 12 and the bogie frame 11.

At the center of the outer surface of the cylindrical housing body 14a, a disc 33 of a disc brake is integrally provided so as to project to one side. Further, the electric motor (driving means) 21
The cylindrical motor casing 210 is fixed to the bogie frame 11 side.
It projects from the inside of the cylindrical protrusion 31 to the opposite side. Inside the motor casing 210, a stator 212, a rotor 213, and a hollow drive shaft 211 are provided in this order from the outer peripheral side in the radial direction to the central portion, and the hollow drive shaft 211 is
The both ends are rotatably supported by the motor casing 210 via a pair of bearings 215 and 216. That is, the motor 21 is arranged around the hollow drive shaft 211.

A portion 214a of the flexible shaft joint is formed on the inner peripheral surface side of the outer end portion of the hollow drive shaft 211, and a portion 214b of the other flexible shaft joint that meshes therewith is formed at the outer end portion of the transmission shaft 217. The flexible shaft joint 214 is formed on the outer peripheral surface of the both. The conductive shaft 217 penetrates the hollow drive shaft 211 and is loosely fitted therein. The outer end side between the hollow drive shaft 211 and the conductive shaft 217 is sealed by an oil seal 218, and the conductive shaft 217 is partially attached to the inner end side. Is protruded and is sealed in the cylindrical protrusion 31 by an oil seal 219. In this example, a gear shaft joint is used as the flexible shaft joint 214.

A recess 201 is formed at the center of the outer surface of the cylindrical projection 31 of the shaft beam 12, and the planetary speed reducer 20 is fitted in the recess 201. The ring-shaped internal gear 202 of the planetary gear 20 is integrally fixed to the shaft beam 12 in the recess 201, meshes with the internal gear 202, and is arranged at equal intervals in the circumferential direction (four or 3) each satellite gear 20
The sun gear 204 is meshed with 3. Each satellite gear 203
Is a cylindrical housing body 14a forming a part of the wheel 14.
Is connected to the central portion of the inner surface of the vehicle through a plurality of support arms as the axle 13 and bearings 13a (see FIG. 4) so as to be integrally rotatable (revolution). In addition, as shown in FIG. 5A, the support arm 13 is rotatably connected to each satellite gear 203 via a bearing 13a, and together with each satellite gear 203, the outer peripheral side of the sun gear 204 and the internal gear. It revolves along the inner peripheral side of 202. And the sun gear 204
Is integrally connected to the inner end of the transmission shaft 217, and the sun gear 204 is a gear with crowning, which is the satellite gear 20.
3 is tiltable in a fixed range in all directions.

In this example, the sun gear 20 of the planetary reducer 20 is used.
4 is tiltable, the sun gear 20 can be tilted even if the satellite gear 203 is tilted as described later.
4. At least two kinds of gears (satellite gear 203 and internal gear 202 in this example) among the satellite gear 203 and the internal gear 202 are fixed to fixed positions, and the remaining gears (this example Since the axial center position of the sun gear 204) is also fixed at a fixed position by another gear, the axial distance between all the gears is kept constant and a smooth driving force transmission is achieved. 4 is a schematic cross-sectional view of the driving device 5 of FIG. 3, and FIGS. 5 and 6 correspond to the drawings in which a part of FIG. 4 is omitted.

The drive device 5 for the single-axle vehicle according to the embodiment is constructed as described above, and its operation mode will be described below.

In the drive unit 5 of this embodiment, as shown in FIG. 3 (a), the shaft beam 12 is supported on the bogie frame 11 so as to be swingable in the vertical direction via a shaft spring 22, and an electric motor as a drive means. 21 is fixed to the bogie frame 11 side, and the wheels 14 and the speed reducer 20 are fixed to the axle beam 12 side. Therefore, when the uniaxial truck 10 travels, the driving force of the motor 21 is transmitted in this order from the hollow drive shaft 211, the flexible shaft coupling 214, and the transmission shaft 217 to the sun gear 204 of the speed reducer 20, and further from the sun gear 204 to the satellite. The vehicle is transmitted by being transmitted to the gear 203 to be decelerated, and the wheels 14 travel by rotating via the support arms 13 that revolve around the satellite gears 204.

During such traveling, a relatively large relative displacement occurs in the vertical direction and the front-back direction between the motor 21 on the bogie frame 11 side and the wheels 14 on the axle beam 12 side. For this relative displacement, the end of the transmission shaft 217 is connected to the end of the hollow drive shaft 211 of the motor 21 on the side opposite to the wheel 14 via a flexible shaft joint 214 so as to be tiltable (swingable) in all directions, Further, the end portion of the transmission shaft 217 on the wheel 14 side is connected to the satellite gear 203 so as to be tiltable (swingable) in all directions with respect to the sun gear 204. Further, since the transmission shaft 217 is long,
Relative displacements of the motor 21 and the wheels 14 in the up-down direction and the front-rear direction are absorbed, and the axial displacement of the transmission shaft 217 is also absorbed within a relatively small range.

5A shows the speed reducer of the above embodiment in which the sun gear 204 of the planetary type planetary gear 20 is crowned, the planetary type planetary gear is shown in FIG. 5B. Even if each satellite gear 203 of the gear 20 is provided with crowning so as to be tiltable in all directions with respect to the sun gear 204, the same operation can be performed. Further, FIG. 6 (a)
6 (c) shows a star type planetary gear 20. The outer ring 205 of the planetary gear 20 is integrally fixed to the shaft beam 12 or formed integrally with the shaft beam 12, and the bearing 206 is attached to the outer ring 205. The wheel 14 is connected to the rotatable internal gear 202 via the support arm 13 so as to be integrally rotatable.
The plurality of satellite gears 203 that mesh with the sun gear 204 are supported by the shaft beam 12 via bearings 207 and fixed arms 130 so as not to revolve, and are rotated (only rotation) at fixed positions. In these cases, the internal gear 202 is crowned as shown in FIG. 6A, or each satellite gear 203 is crowned as shown in FIG. 6B.
As shown in (c), the sun gear 204 is crowned to allow the sun gear 204 to tilt in all directions with respect to the internal gear 202 in any case. Note that FIG.
In the example of (a), the fixed arm 130 is fixed to the bogie frame 11 side,
The axial beam 12 is configured to be displaceable via a spring 120, but in the example of FIGS. 6B and 6C, the fixed arm 1 is used.
30 is fixed to the shaft beam 12 by a support member 121.

FIG. 7 is a longitudinal sectional view showing another embodiment of the driving apparatus of the present invention and is a sectional view corresponding to FIG.

The drive device 6 of this example, as shown in FIG.
The wheel 14 is connected to the axle beam 12 via the axle 13 and the bearing 13b.
On the other hand, the motor 21 and the planetary speed reducer 20 are supported by the bogie frame 11. The shaft beam 1
The point where the shaft spring 22 is interposed between 2 and the bogie frame 11 is common to the above-mentioned embodiment.

More specifically, the cylindrical casing 210 of the motor 21 is fixed to the bogie frame 11, and the stator 212 and the rotor 213 in the casing 210 are arranged around the hollow drive shaft 211 in this order from the outer peripheral side. A transmission shaft 217 is tiltably and loosely fitted through the hollow drive shaft 211. One end of the transmission shaft 217 has a flexible shaft coupling 21.
It is connected to the axle 13 via 4 so as to be swingable in all directions.

The internal gear 202 of the planetary reducer 20 is integrally fixed to the bogie frame 11, and the end of the hollow drive shaft 211 on the opposite side of the wheel 14 is integrally rotatable with the sun gear 204 of the reducer 20. It is connected. A crowned gear is used for each satellite gear 203 that meshes with the sun gear 204, and is tiltably meshed with the sun gear 204 and the internal gear 202. One end of the support arm 35 is rotatably connected to each satellite gear 203 via a bearing 36, and the other end of the support arm 35 is rotatably connected to the other end of the transmission shaft 217.

According to the drive unit 6 of the present embodiment having the above-mentioned structure, the hollow drive shaft 211 is driven by the motor 21 so that the sun gear 2 moves.
04, and all the satellite gears 203 that mesh with the sun gear 204 rotate and revolve, the transmission shaft 217 rotates, and the wheels 14 rotate with the axle 13. On the other hand, the displacement of the wheel 14 with respect to the motor 21 and the speed reducer 20 is
The satellite gear 203 of the speed reducer 20 on one end side of the transmission shaft 217 is tiltable (swingable) in all directions, the transmission shaft 217 is long, and the other end side of the transmission shaft 217 is connected via a flexible shaft coupling 214. Since it can be tilted (swinged) in all directions, relative displacements of the motor 21 and the wheels 14 in the up-down direction and the front-rear direction are absorbed as in the above embodiment, and the displacement of the transmission shaft 217 in the axial direction is also compared. Absorbed within a very small range.

Note that the sun gear 204 and the internal gear 202 may be crowned instead of the crowning of the satellite gear 203 so that the satellite gear 203 can be tilted. Also in this case, the sun gear 204
At least two of the satellite gear 203 and the internal gear 202
Type of gear (in this example, the sun gear 204 and the internal gear 2
02) is fixed at a fixed position, and the position of the satellite gear 203 is fixed at a fixed position by another gear. Therefore, the distance between the gears is kept constant.
A smooth drive transmission is achieved.

FIG. 8 is a longitudinal sectional view showing still another embodiment of the driving device of the present invention, which is a sectional view corresponding to FIG.

The drive device 7 of this example is different from the drive device 6 of the above embodiment in the following points. As shown in FIG. 8, instead of using a crowned gear for the satellite gear 203, an elastic body such as a rubber bush 35a is press-fitted into the annular bearing 36 of each satellite gear 203 to fit one end of the support arm 35, That is, 35 can be tilted in all directions. Since other configurations and operations are the same as those in the above-described embodiment, the same reference numerals are used for the common members in the drawings, and the description thereof will be omitted.

By the way, in the drive devices 5 to 7 according to each of the above-mentioned embodiments, a flexible shaft coupling 214 is provided for connecting the hollow drive shaft 211 and the conductive shaft 217. In addition to the gear shaft coupling, although not shown, for example, an annular flexible plate is used as the shafts 211 and 2
"Flexible plate joint" that allows displacement in all directions by interposing between 17 and connecting with bolts and nuts, "quill (hollow shaft) type shaft joint", "link type shaft joint" Or a "constant velocity ball joint" can be used.

FIG. 9 is a sectional view showing a drive unit 8 according to another embodiment of the present invention, and FIG. 10 is a front view showing a double pinion type planetary speed reducer used in the drive unit 8.

As shown in FIG. 9, the basic structure of the drive unit 8 of the present embodiment is generally common to that of the drive units 5 to 7 of the above embodiment, and the wheel 14 has an annular bearing 34 on the shaft beam 12 side. The motor casing 210 of the motor 21 is integrally attached to the bogie frame 11, and
Is supported by the bogie frame 11 via a pair of front and rear shaft springs 22. The difference from the above-described embodiment is that the drive shaft 211 ′ of the motor 21 is solid and does not include the transmission shaft 217, and the speed reducer 20 uses the following double pinion type planetary speed reducer. One end of the drive shaft 211 ′ is integrally rotatably connected to the sun gear 204, and the internal gear 20 of the speed reducer 20 with respect to the wheel 14 is connected.
The difference is that the two are integrally formed.

As shown in FIG. 10, the speed reducer 20 includes an internal gear 202 between an internal gear 202 and a sun gear 204.
At least one double pinion of the satellite gear 203a that meshes with the side and the satellite gear 203b that meshes with the sun gear 204, and in this example, four double pinions are provided at equal intervals in the circumferential direction. The center portion of the sun gear 204 and the center portion of the satellite gear 203a are rotatably supported via the inter-axis holding arm 37 and the bearing 37a (FIG. 9) so that the satellite gear 203a is kept in mesh with the sun gear 204. And a pair of satellite gears 203a.20 that mesh with each other
The center portions of the satellite gears 203a and 203b are rotatably supported by the shaft holding arms 38 and the bearings 38a (FIG. 9). Further internal gear 2
The satellite gear 203b meshing with the No. 02 side is always the internal gear 202 as well.
So as to mesh with the satellite gear 203b, one end of the inter-axis holding arm 39 is rotatably supported via a bearing 39a (FIG. 9) at the center of the satellite gear 203b, and an annular rail 41 is provided on the outer peripheral surface of the internal gear 202. The rail 41 is projected and the inter-axis holding arm 39 is provided.
By being sandwiched between a pair of rollers 42 and 43 mounted at the other end side in the radial direction at intervals, they are rotated in the circumferential direction along the rail 41.

In the drive device 8 of the present embodiment having the above-mentioned configuration, when the sun gear 204 is rotated clockwise, for example, by the drive shaft 211 of the motor 21, the satellite gear 20 on the sun gear side.
3a rotates counterclockwise (only rotation), the internal gear side satellite gear 203b rotates clockwise (only rotation), and the wheel 14 integrated with the internal gear 202 rotates clockwise. Moreover, as shown in FIG. 11A, the sun gear 204 and the internal gear 202 are aligned with each other, for example, as shown in FIG.
As shown in (b), the shaft center of the sun gear 204 is the internal gear 202.
The driving force of the motor 21 is transmitted to the wheels 14 even if the shaft is eccentric to the lower side of the axis. In other words, even if the wheel 14 is displaced with respect to the bogie frame 11 to which the motor 21 is fixed, the satellite gear 203a that meshes with the internal gear side of each set keeps the meshed state with respect to the other satellite gear 203b. By moving in the circumferential direction, the displacement of both is absorbed. It should be noted that how many pairs of satellite gears 203a and 203b are incorporated is determined in consideration of whether the direction of relative displacement between the internal gear 202 and the sun gear 204 includes only the vertical direction or the front-back direction.

Although a plurality of embodiments of the drive device for the rail car bogie of the present invention have been described above, the present invention can also be carried out as follows.

Although the above embodiment has been described by taking a uniaxial bogie as an example, each wheel 14 of a so-called bogie bogie having a pair of front and rear wheels 14 on the left and right of one bogie frame 11.
It goes without saying that it can be applied as a driving device of

In the planetary speed reducer and the double pinion type planetary speed reducer, the sun gear may be integrally connected to the axle of the wheel, and the internal gear may be rotated by the motor 21 to drive the wheel.

Cyclo reducer in place of the planetary reducer 20 (a reducer provided with a cycloidal tooth that is inscribed or circumscribed in the pitch circle of the gear and is shaped by a locus of one point on the circumference rolling without slipping) Can be used
In this case, since the reduction ratio can be increased, it is possible to reduce the size and weight of the motor as a high-speed rotation motor.

[0056]

As is apparent from the above description,
The drive device for a railcar bogie according to the present invention has the following excellent effects.

(1) Absorption of relative displacement between the drive means mounted on the bogie frame side or the speed reducer and the wheels, the drive force from the drive means can be reliably transmitted to the wheels, and one type of planetary gear The gear can be tilted with respect to other gears, and the shaft coupling can be omitted to simplify the structure and reduce the weight of the entire device.

Further, in the drive device according to the first aspect, the relative displacement between the drive means on the bogie frame side and the wheel (support portion thereof) during traveling is caused by the sun gear of the reduction gear provided integrally with the wheel. Can be tilted with respect to satellite gears or internal gears, and can be tilted in all directions via a flexible shaft coupling with the other end of the transmission shaft, one end of which is connected to the sun gear so as to be integrally rotatable, to the hollow drive shaft of the drive means. Is absorbed by tilting the long conductive shaft, and the axial displacement of the conductive shaft is also absorbed within a relatively small range.

Further, even if the sun gear of the planetary gear is tiltable, the axial center positions of the satellite gear and the internal gear are fixed, and the axial center position of the sun gear is also fixed by another gear. Being fixed in position, the axial distance between the gears is kept constant and a smooth drive force transmission is achieved.

(2) In the drive device according to the second aspect, the relative displacement between the drive means on the bogie frame side and the speed reducer and the wheel (supporting portion) during traveling is such that one end of the transmission shaft is connected. The satellite gear of the speed reducer is equipped with a flexible shaft joint that can tilt with respect to other gears and can tilt in all directions with the wheel at the other end side of the transmission shaft, and the transmission shaft has a sufficient length. Therefore, the driving shaft of the motor can be decelerated and reliably transmitted to the wheel while absorbing the relative displacement with the wheel due to the inclination of the transmission shaft.

(3) In the drive device according to the third aspect, the relative displacement which may occur between the drive means on the bogie frame side and the speed reducer and the wheel (support portion thereof) during traveling causes the transmission shaft to move. The satellite gear of the speed reducer with one end connected is supported so that it does not tilt relative to the other gears, but the elastic body such as a rubber bush deforms with respect to the bearing of the satellite gear and the tilt of the transmission shaft Therefore, it is possible to absorb the angular deviation between the center shaft of the reduction gear and the transmission shaft, and to reduce the driving force of the drive means while absorbing the relative displacement between the transmission shaft and the wheel due to the inclination of the transmission shaft. Can be transmitted to the wheels.

(4) In the drive device according to the fourth aspect, the drive force of the drive means is transmitted to the drive shaft, the sun gear, the satellite gear on the sun gear side, and the satellite gear on the internal gear side to reduce the internal speed. It is transmitted to the wheels integrated with it through the toothed gears, and the wheels rotate, while a relative displacement may occur between the drive means on the bogie frame side and the wheels and the speed reducer during traveling. It is sufficient to allow the eccentricity of the axis of the internal gear with respect to that of the internal gear by allowing the satellite gear that meshes with the internal gear to move in the circumferential direction with respect to the satellite gear that meshes with the sun gear. Can be absorbed by

(5) In the drive device according to the fifth aspect, the drive shaft is rotated by the drive means, and the sun gear integrated with the drive shaft is rotated, whereby the satellite gear meshing with the sun gear is rotated and the sun gear is rotated. The other satellite gear that meshes rotates, the internal gear that meshes with each other rotates, and the wheels that are integral with this internal gear rotate, so that the uniaxial bogie runs. At this time, the satellite gear that meshes with the internal gear is always kept in mesh with the internal gear via the inter-axis holding arm guided by the annular rail, and the driving force of the motor is decelerated to ensure Transmitted to the wheels. Further, the relative displacement between the drive means and the wheels is such that the angle θ connecting the centers of both gears of the satellite gear meshing with the sun gear changes, and the axis of the sun gear integrated with the drive shaft of the drive means (center). On the other hand, the eccentricity of the shaft center of the internal gear integrated with the wheel is allowed and absorbed.

[Brief description of drawings]

FIG. 1 is a side view showing a 100% low floor type two-car train articulated vehicle equipped with a drive unit for a single-axle truck according to an embodiment of the present invention.

FIG. 2 shows a uniaxial truck equipped with a drive device according to an embodiment of the present invention, FIG. 2 (a) is a plan view seen from above (direction A in FIG. 2 (b)), and FIG. 2) is a side view seen from the direction B in FIG.

FIG. 3 shows a drive device 5 for a uniaxial truck according to another embodiment of the present invention, FIG. 3 (a) is a front view seen from the front (direction A in FIG. 3 (b)), and FIG. b) is BB of FIG.
It is a line sectional view.

4 is a cross-sectional view schematically showing a drive device 5 of the single-axle truck shown in FIG.

5 is a cross-sectional view showing a planetary type planetary gear 20 of a drive device for a single-shaft truck, FIG. 5 (a) shows a sun gear with crowning, and FIG. 5 (b) shows a satellite gear with crowning. Indicate the case.

FIG. 6 is a cross-sectional view showing a star type planetary gear 20 of a drive device for a single-shaft truck. FIG. 6 (a) shows an internal gear with crowning, and FIG. 6 (b) shows a satellite gear with crowning. In this case, FIG. 6C shows a case where the sun gear is crowned.

7 is a longitudinal sectional view showing a driving device 6 according to another embodiment of the present invention, which is a sectional view corresponding to FIG.

8 is a vertical cross-sectional view showing a drive device 7 according to another embodiment of the present invention, which is a cross-sectional view corresponding to FIG.

FIG. 9 shows a drive device 8 according to another embodiment of the present invention,
It is CC sectional view taken on the line of FIG.

FIG. 10 is a front view showing a double-pinion type planetary speed reducer used in the drive unit 8 of the present invention, showing the inter-shaft holding arm 3;
7, 38, 39 and rollers 42, 43 are partially omitted.

FIG. 11 (a) is a front view showing a state where the sun gear and the internal gear have the same axial center, and FIG. 11 (b) shows the sun gear whose axial center is lower than the internal gear's axial center. It is a front view showing an eccentric state.

[Explanation of symbols]

5-8 Drive 10 uniaxial truck 11 bogie frame 12 axis beams 13 axles 14 wheels 14a Cylindrical housing body 15 Horizontal links 16 base links 20 Planetary reducer 21 motor (driving means) 37-39 Inter-axis holding arm 202 Internal gear 203 ・ 203a ・ 203b Satellite gears 204 sun gear 210 motor casing 211 hollow drive shaft 211 'drive shaft 212 Stator 213 rotor 214 flexible shaft coupling 215/216 bearings 217 conduction axis

Front page continued (72) Inventor Koji Kadota 1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries Ltd. Akashi factory (72) Inventor Yukinobu Kawano 1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries Inside the Akashi Factory (72) Inventor Yuji Shindo 1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries Ltd. Inside Akashi Factory (72) Inventor Osamu Kawasaki-cho, Akashi-shi, Hyogo Prefecture Kawasaki Heavy Industries Inside the Akashi Factory (72) Inventor Hideaki Ezaki 1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside the Akashi Factory (56) Reference JP 2001-10488 (JP, A) JP 2000-309268 (JP, A) JP 51-95305 (JP, A) JP 8-244604 (JP, A) JP 8-244605 (JP, A) JP 36-17511 (JP, Y1) 58) Fields investigated (Int. Cl. ⁷ , DB name) B61C 9/46 B61C 9/44 B61C 9/38

Claims (5)

(57) [Claims] 1. A support portion for rotatably supporting left and right wheels is supported by a bogie frame via a shaft spring, and is integrally provided with the wheels by a driving means such as a motor supported by the bogie frame. A drive device for a bogie for a railway vehicle in which the wheels are driven via a speed reducer, wherein the drive means is arranged around the same axis as the axle of the wheels, and the drive shaft at the center of the drive means is The hollow drive shaft is made hollow, and the transmission shaft is penetrated into the hollow drive shaft so as to be freely tilted, and one end of the hollow drive shaft is connected to the end of the transmission shaft opposite to the wheel through a flexible shaft joint. Together with the sun gear using a planetary speed reducer, the wheel side end of the transmission shaft is integrally rotatably coupled, the sun gear, satellite gears or each satellite gear meshing with the sun gear. Crowning any of the meshing internal gears Can the gear drive of the carriage for railway vehicles, characterized in that the sun gear is constructed tiltably relative to the satellite gears or the internal gear. 2. A deceleration supported on the bogie frame by a drive unit such as a motor supported on the bogie frame, wherein a support portion for rotatably supporting the left and right wheels is supported on the bogie frame via a shaft spring. A drive device for a bogie for a railway vehicle in which the wheels are driven via a machine, wherein the drive means is arranged around the same axis as the axle of the wheels, and the drive shaft at the center of the drive means is hollow. Then, a transmission shaft is passed through the hollow drive shaft so as to be freely tilted, and a planetary speed reducer is used as the speed reducer so that one end of the hollow drive shaft can be integrally rotated with a sun gear of the speed reducer. One end of the transmission shaft is integrally connected to a support arm that is rotatably connected to a satellite gear that meshes with the sun gear through a bearing, and the other end of the transmission shaft is connected via a flexible shaft joint. Connected to the wheel axle, the sun gear and the internal gear Alternatively, the satellite gear is a gear with crowning, and the satellite gear is configured to be tiltable with respect to a sun gear and an internal gear that mesh with the crown gear. 3. A deceleration supported on said bogie frame by means of a drive means such as a motor supported on said bogie frame, wherein a supporting portion for rotatably supporting left and right wheels is supported on said bogie frame via a shaft spring. A drive device for a bogie for a railway vehicle in which the wheels are driven via a machine, wherein the drive means is arranged around the same axis as the axle of the wheels, and the drive shaft at the center of the drive means is hollow. Then, a transmission shaft is passed through the hollow drive shaft so as to be freely tilted, and a planetary speed reducer is used as the speed reducer so that one end of the hollow drive shaft can be integrally rotated with a sun gear of the speed reducer. One end of the transmission shaft is integrally connected to a support arm that is rotatably connected to a satellite gear that meshes with the sun gear through a bearing, and the other end of the transmission shaft is connected via a flexible shaft joint. Connected to the axle of the wheel, the support arm is connected to the satellite tooth A drive device for a bogie for a railroad vehicle, which is connected to a bearing portion of a car so as to be tiltable in all directions with an elastic body such as a rubber bush interposed. 4. A support portion for rotatably supporting left and right wheels is supported by a bogie frame via a shaft spring, and is integrally provided with the wheels by a driving means such as a motor supported by the bogie frame. A drive device for a rail car bogie in which the wheels are driven via a speed reducer, wherein the drive means is arranged around the same axle as the axle of the wheels, and they are meshed with each other and one of them is a sun A double pinion type planetary gear having at least one pair of satellite gears, each of which is meshed with an internal gear and the other of which is held at a constant gear distance via an inter-shaft holding arm, is provided in the speed reducer. It is characterized in that one end of the drive shaft of the drive means is integrally rotatably connected to the sun gear of the speed reducer, and the internal gear of the speed reducer is integrally rotatable with the wheel. For rail cars Drive. 5. The center portion of the satellite gear that meshes with the sun gear of the double pinion type planetary gear is rotatably supported with respect to the center portion of the sun gear via an inter-axis holding arm and a bearing, and mutually. The center portions of a pair of meshing satellite gears are rotatably supported via inter-axis holding arms and bearings, and one end of the inter-axis holding arm is mounted through a bearing to the center portion of the satellite gears meshing with the internal gear. Is supported by a pair of rollers that are mounted on the outer surface of the internal gear by projecting an annular rail, and the rail is mounted on the other end of the inter-axis holding arm at a radial interval. 5. The device is sandwiched so as to be movable along it.
A drive device for a bogie for a railway vehicle as described above.