JPH11301471A - Direct-drive-type motor-operated truck for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce under-spring weight of a direct-drive-type motor-operated truck, improve durability of a ground facility such as a rail, and improve maintenance and inspection ability. SOLUTION: This direct-drive-type motor-operated truck for rolling stock having a structure which transmits torque of a primary motor M directly to a wheel 3 is provided with an underframe D for sharing at least a part of weight of the primary motor M. The weight of the primary motor M which is traditionally set as under-spring weight is shared by the underframe D, and therefore is set to be above-spring weight. Because the under-spring weight is reduced by that part, impact force to the track strip or others is moderated, and durability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a direct drive electric bogie for a railway vehicle, and more particularly to a railway vehicle capable of reducing the unsprung mass and improving the durability and running performance of ground equipment. And a direct drive electric bogie.

[0002]

2. Description of the Related Art In an electric bogie for railway vehicles, in the case of a direct drive electric bogie, the torque of a main motor is transmitted directly to wheels without intervening gears or the like. The main motor itself is attached to wheels and axles via fixed joints and elastic joints, and has a structure in which only the rotational reaction force is received by the bogie. 4 and 5 specifically show a mounting method of a main motor of a conventional conventional direct drive electric bogie for a railway vehicle. FIG. 4 shows that the rotor R of the main motor M is a stator S.
Is an outer rotor type electric trolley disposed outside the vehicle. In this motor, a stator S of a main motor M is fixed to a hollow axle 1, wheels 3 are rotatably mounted on the axle 1 via wheel bearings 2, and a rotor R of the main motor M is connected to a connecting bolt 4. And is directly connected to the side surface of the wheel 3. Both ends of the axle 1 are supported by a bogie frame D via a buffer spring 5.

FIG. 5 shows that a rotor R of a main motor M is a stator S
Is an inner rotor type direct drive electric bogie that is rotatably disposed inside a main motor bearing 7 via a main motor bearing 7. The rotor R is connected to the axle 1 via a joint 6 with an elastic material, and both ends of the axle 1 are rotatably supported by a bogie frame D via a buffer spring 5 and an axle bearing 8. The wheels 3 are fixedly supported on the axle 1 so as to be integrally rotatable.

[0004]

However, in the above-described conventional direct drive electric bogie, regardless of the outer rotor type shown in FIG. 4 and the inner rotor type shown in FIG. 8, the mass of the main motor M also becomes unsprung mass and is applied to the axle 1. As a result, the unsprung mass becomes excessively large, thereby imposing an unreasonable burden on the ground equipment including the rails 9. In addition, there is a problem that the durability of the above-mentioned ground equipment is reduced and running noise is increased.

Accordingly, the present invention has been made in view of such problems of the conventional direct-drive electric bogie for railway vehicles, and reduces the unsprung mass of the direct-drive electric bogie so that rails and the like can be used. The purpose of the present invention is to improve the durability of the above ground equipment and to improve the maintenance and inspection properties.

[0006]

In order to achieve the above object, a direct drive electric bogie for a railway vehicle according to the present invention is provided.
A direct drive electric bogie for a railway vehicle having a structure for directly transmitting the torque of a main motor to wheels is provided with an underframe that bears at least a part of the mass of the main motor.

Here, the bogie frame may include a hanging rod or a beam for fixing a stator of the main motor. The hanging rods and beams may fix one end of a stator of the main motor.

[0008] Further, the hanging rods and beams may fix both ends of a stator of the main motor.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In some cases, the same or corresponding parts as those in the related art are denoted by the same reference numerals, and duplicate description is omitted.

FIG. 1A is a sectional view of a main part of a direct drive electric bogie for an inner rotor type railway vehicle according to a first embodiment of the present invention. One end of the rotor R, which is the rotating side of the main motor M, is connected by a connecting bolt 4 to a joint 6 with an elastic member having an inner and outer diameter reinforcing ring 6a and an elastic member 6b as a buffer member as shown in FIG. The joint 6 with elastic material
Are fixed to the axle 1 so as to be integrally rotatable. Reference numeral 11 denotes a support bush, and the inner diameter surface of one end of the rotor R is supported on the outer diameter surface of the axle 1 by the support bush 11.

A stator S which is a stationary side of the main motor M is disposed outside the rotor R via a main motor bearing 7. One end of the stator S (that is, the side opposite to the side where the rotor R is connected to the axle 1 via the elastic joint 6) is connected and fixed to the underframe D by the suspension beam 12. Although not shown, a plurality of suspension beams 12 are provided to bear the mass of the main motor M and the rotational reaction force.

Next, the operation will be described. In this embodiment, the main motor M has one end of the rotor R fixed to the axle 1 via the elastic joint 6, and the end of the stator S on the side opposite to the fixed end of the rotor R is fixed to the frame D. Fixed to
The mass of the main motor M is applied to the unsprung axle 1 and
It also covers the underframe D on the spring. That is, of the unsprung mass of this direct drive electric bogie, half of the mass of the main motor M is shared by the underframe D and becomes sprung mass. Since the impact force applied to the rail 9 during traveling is proportional to the unsprung mass, according to this embodiment, the unsprung mass corresponding to half the mass of the main motor M is reduced, and the rail 9 and other ground The impact force on the equipment is reduced, the durability is improved, and the running noise is also reduced. In addition, the maintenance and inspection of these ground facilities are also improved.

FIG. 2 is a sectional view of a main part of a direct drive electric bogie for a railway vehicle of the same inner rotor type showing a second embodiment of the present invention. This embodiment is different from the first embodiment in that both ends of the stator S, which is the stationary side of the main motor M, are fixedly supported on the underframe D via the suspension rods 12, respectively. The rotor R on the rotating side of the main motor M is
One end thereof is connected to the axle 1 via a universal joint 13 that transmits rotational torque.

With this configuration, all of the mass of the main motor M is applied to the underframe D, and the main motor M is completely sprung, so that the impact force on the rail 9 and other ground equipment is reduced to the first. As compared with the embodiment of the present invention, the durability is further improved, and the maintenance and inspection of those ground facilities are further improved.

FIG. 3 shows a third embodiment of the present invention, and is a cross-sectional view of a main part of a direct drive electric bogie for an outer rotor type railway vehicle. In this case, the main motor M
Is fixedly supported on a frame D via a suspension rod 12 and is rotatably disposed outside the stator S via a main motor bearing 7. One end of the rotor R (the left end in the figure, that is, the side opposite to the side where the stator S is supported by the underframe D via the suspension rod 12) is integrally rotated with the axle 1 via the elastic joint 6. It is fixed as possible.

In the third embodiment, as in the first embodiment, half of the mass of the main motor M is shared by the underframe D and becomes a sprung mass, which is transferred to the rail 9 and other ground equipment. Impact force is reduced and durability is improved,
Maintainability of those ground facilities is also improved.

[0017]

As described above, according to the direct drive electric bogie for a railway vehicle according to the present invention, at least a part of the mass of the main motor is loaded on the underframe to make the sprung mass. Since the mass is reduced, the impact force on the rail and other ground equipment can be reduced, and as a result, the durability and maintenance and inspection of the rail and other ground equipment are improved.

[Brief description of the drawings]

FIG. 1A is a sectional view of a main part of a first embodiment of a direct drive electric bogie for a railway vehicle according to the present invention, and FIG. 1B is an enlarged view of a joint portion with an elastic member.

FIG. 2 is a sectional view of a main part showing a second embodiment of a direct drive electric bogie for a railway vehicle according to the present invention.

FIG. 3 is a sectional view of a main part showing a third embodiment of a direct drive electric bogie for a railway vehicle according to the present invention.

FIG. 4 is a sectional view of a main part showing an example of a conventional direct drive electric bogie for a railway vehicle.

FIG. 5 is a sectional view of a main part showing another example of a conventional direct drive electric bogie for a railway vehicle.

[Explanation of symbols]

 1 Axle 3 Wheel 9 Rail M Main motor R Rotor D Underframe

Claims (1)

[Claims] 1. A direct drive electric bogie for a railway vehicle having a structure in which torque of a main motor is directly transmitted to wheels, comprising a frame that bears at least a part of the mass of the main motor. Direct drive electric bogie for railway vehicles.