JPH11301470A - Driving device for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pinion and a gear from causing any problem and under- spring weight from increasing. SOLUTION: A rotation shaft 11a of a primary motor 11 is formed in the hollow shape, and the primary motor 11 is fixed to a carriage frame 12 above a shaft spring 17 to arrange this hollow rotation shaft 11a with a same core as that of an axle 13 and in the outside insertion shape into the axle 13. One end of the hollow rotation shaft 11a is connected with the axle 13 through a joint 14. The joint 14 is constituted with one end of the hollow rotation shaft 11a, a pair of joint hubs 14a, 14d respectively engaged with the axle 13, links 14h of which respective one ends are connected with both ends of these joint hubs 14a, 14d through elastic bodies 14g, and intermediate bodies 14i for integrally connecting the other ends of these links 14h each other through the elastic bodies 14g. Thus, maintenance and inspection becomes easy, and generation of noise can be restrained. Under-spring weight can be reduced to reduce wheel weight variation, and running stability becomes good.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a railway vehicle.

[0002]

2. Description of the Related Art In a conventional railway vehicle drive device, as shown in FIG.
Is transmitted to a hollow rotary shaft 4 arranged coaxially with an axle 6 via a pinion 2 attached to the shaft and a gear 3 meshing with the pinion 2, and transmitted from the hollow rotary shaft 4 to an axle 6 via a joint 5. Was to be done.

In the joint 5, a pair of joint hubs 5a and 5b are attached to the hollow rotary shaft 4 and the axle 6, respectively, and these joint hubs 5a and 5b are connected to the connecting arms 5a.
c, the link 5e and the intermediate 5f are connected via the elastic body 5d.

As shown in FIG. 11, a rotor 1b of the main motor 1 is fitted to the axle 6, and a case 1c of the main motor 1 is rotatably mounted on the axle 6 via a bearing 7.
There is also a structure in which a coil 1d is provided at a position facing the rotor 1b on the inner surface of the case 1c. FIG.
0 and 8 in FIG. 11 indicate wheels, and 9 in FIG. 11 indicates a shaft spring.

[0005]

However, FIG.
In the drive device having the structure shown in FIG. 1, since the pinion 2 and the gear 3 are interposed, the cost is increased, the maintenance is complicated, and there is a problem that noise is generated.

On the other hand, in the driving device having the structure as shown in FIG. 11, the problem caused by the pinion 2 and the gear 3 does not occur, but since the weight of the main motor 1 directly acts on the axle 6, the unsprung state Weight increases. When the unsprung weight increases, there arises a problem that the fluctuation of the wheel load during traveling increases to decrease the traveling stability and to cause the track to break.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and eliminates the pinion and the gear without causing any problems caused by the pinion and the gear, and also increases the unsprung weight. It is an object of the present invention to provide a drive device for a railway vehicle that does not cause the vehicle to run.

[0008]

In order to achieve the above object, a railway vehicle drive device according to the present invention is configured such that a rotating shaft of a main motor is hollow, and the hollow rotating shaft is connected to an axle. The main motor is fixed to a portion above the shaft spring so as to be arranged coaxially and externally on the axle, and one end of the hollow rotary shaft and the axle are connected via a joint. And And by doing this,
The problem caused by the pinion and the gear does not occur, and the unsprung weight does not increase.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A railway vehicle driving device according to the present invention comprises:
The rotary shaft of the main motor is formed hollow, and the hollow rotary shaft is coaxial with the axle, and the main motor is fixed above the shaft spring so as to be fitted over the axle. , One end of the hollow rotary shaft and the axle are connected via a joint. As the joint, a pair is fitted to the one end of the hollow rotary shaft and the axle, respectively. A joint hub, a link connected to one end of each of these joint hubs via an elastic body, and an intermediate body integrally connected to the other end of the link via an elastic body. A structured one is desirable.

According to the railway vehicle drive device of the present invention, since the pinion and the gear are not used for transmitting the rotational force from the main motor to the axle, the pinion and the gear are difficult to perform maintenance inspection or generate noise. Does not cause any problems. Further, since the main motor is attached to a portion above the shaft spring such as a bogie frame, the unsprung weight does not increase.

In the above-described drive apparatus for a railway vehicle according to the present invention, the coupling hub fitted to the axle is fitted to a wheel attached to the axle instead of the axle, or the coupling hub is rotated instead of the elastic body. Use a free bush, or integrally form a hollow rotating shaft and a joint hub fitted to one end of the rotating shaft, or a wheel and a joint fitted to the wheel. If the hub is integrally formed, the joint can be simplified.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
A description will be given based on the embodiment shown in FIG. FIG. 1 is a front view showing a configuration of a railway vehicle drive device according to the present invention in partial cross-section, FIG. 2 is a view showing FIG. 1 from a side direction, and FIG. 3 is a railway vehicle drive of the present invention. FIG. 4 is a view of the joint structure of the device as viewed from the front, FIG. 4 is a diagram of FIG. 3 viewed from the side, and FIG. 5 is a side view of main components of the joint of the railway vehicle drive device of the present invention. (A) is a coupling hub on the main motor side, (b) is a link, (c) is an intermediate,
(D) is a diagram showing a coupling hub on the axle side, FIG. 6 is an explanatory diagram in a case where the coupling hub, which is a component of the railway vehicle drive device of the present invention, is fitted to wheels, and FIG. FIG. 8 is an explanatory view showing a case where an elastic body, which is a component of a joint of a railway vehicle drive device, is changed to a bush. FIG. FIG. 9 is an explanatory view showing a case where a joint hub, which is a component of the railway vehicle drive device of the present invention, is integrally formed with a wheel.

1 to 5, reference numeral 11 denotes a main motor, and a rotary shaft 11a is formed in a hollow shape. The main motor 11 has a hollow rotating shaft (hereinafter referred to as a “hollow rotating shaft”) 11 a which is coaxial with the axle 13 and which is arranged on the axle 13 so as to be externally fitted thereto. 12 is fixed.

A joint 14 connects one end of the hollow rotary shaft 11a and the axle 13, and has, for example, the following configuration. Reference numeral 14a denotes a joint hub fitted to one end of the hollow rotary shaft 11a. For example, as shown in FIG. 5A, a large-diameter hole 14aa for fitting the hollow rotary shaft 11a is provided at the center, and both ends are provided. Is provided with a small-diameter hole 14ab into which a pin 14c for attaching a connection arm 14b described later is inserted.

Reference numeral 14d denotes a joint hub which is paired with the joint hub 14a, and is fitted to the axle 13 near one end of the hollow rotary shaft 11a. And this joint hub 14d is also
As in the joint hub 14a, as shown in FIG. 5D, a large-diameter hole 14da into which the axle 13 is fitted is provided at the center, and a pin 1 for attaching a connecting arm 14e to be described later is provided at both ends.
A small diameter hole 14db into which 4f is inserted is provided.

Reference numeral 14b denotes a connecting arm protrudingly mounted by a pin 14c on both ends of the joint hub 14a on the anti-hollow rotating shaft 11a side. The connecting arms are protrudingly mounted by 14f, and elastic bodies 14g are fitted around the connecting arms, respectively.

Reference numeral 14h denotes a link having through holes 14ha and 14hb at both ends as shown in FIG. 5 (b).
In this embodiment, four pairs are used. These links 14h are respectively inserted into the through holes 14ha at one end.
The connecting arms 14b and 14f fitted with the elastic body 14g are inserted and connected to the joint hubs 14a and 14d.

As shown in FIG. 5 (c), a large diameter hole 14ia for inserting the axle 13 is provided at the center of the 14i.
It is an intermediate body provided with two small-diameter holes 14ib at both ends. Pins 14j are attached to these small-diameter holes 14ib, for example, as in the above-described joint hubs 14a and 14d. In the fitted state, the link 14h is inserted into a through hole 14hb provided at the other end of the link 14h.

1 to 5, 15 is a wheel fitted to the axle 13, 16 is a bearing for rotatably supporting the axle,
Reference numeral 17 denotes a shaft spring provided between the bogie frame 12 and the axle 13.

The railway vehicle drive device of the present invention has the above-described configuration, and the rotational force of the main motor 11 is controlled by the main motor 1
1 from the hollow rotary shaft 11a to the joint hub 14a, the connecting arm 1
4b, elastic body 14g, link 14h, elastic body 14k, intermediate body 14i, elastic body 14k, link 14h, elastic body 14
g, the connecting arm 14e, and the axle 13 via the joint hub 14d.
Is transmitted to

In such a railway vehicle drive device of the present invention, even if the shaft spring 17 is flexed and relatively displaced between the bogie frame 12 and the axle 13 due to running vibration, the joint 14 described above is used.
, The rotational force of the main motor 11 is
3 (wheel 15) is smoothly transmitted. At this time, in the railway vehicle drive device of the present invention, the main motor 11
Is fixed to the bogie frame 12 above the shaft spring 17, so that the unsprung weight does not increase.

In the railway vehicle drive device of the present invention,
Since pinions and gears are not used to transmit torque from the main motor 11 to the axle 13, maintenance and inspection are difficult.
There is no problem such as noise caused by the pinion and gear.

The drive unit for a railway vehicle according to the present invention is not limited to the above-described embodiment. For example, as shown in FIG. 6, the joint hub 14d is fitted to the wheel 15 instead of the axle 13, or , Joint hubs 14a, 14d and link 14h
The elastic member 14g interposed between the intermediate member 14h and the elastic member 14k interposed between the link 14h and the intermediate member 14i may be changed to a rotatable bush 18 as shown in FIG.

Further, as shown in FIG.
The joint hub 14a fitted to one end of the wheel 1a is formed integrally with the hollow rotary shaft 11a, or as shown in FIG.
The joint hub 14 d fitted to the wheel 5 may be formed integrally with the wheel 15. With such a configuration, the components of the joint 14 can be simplified.

In the above embodiment, the joint hub 1 is used.
Although the connecting arms 14b and 14e are attached to 4a and 14d, the connecting arms 14b and 14e may be formed integrally with the joint hubs 14a and 14d.

Further, the configuration of the joint 14 is not limited to the above-described embodiment, and the relative displacement between the bogie frame 12 and the axle 13 can be absorbed, and one end of the hollow rotary shaft 11a and the axle 13 are connected. A joint having another configuration may be used as long as it can be connected.

[0027]

As described above, according to the railway vehicle drive device of the present invention, since the pinion and the gear are not used for transmitting the rotational force from the main motor to the axle, maintenance and inspection are easy, and noise is reduced. Occurrence can also be suppressed. The main motor is
For example, since it is mounted above the shaft spring such as a bogie frame, the unsprung weight can be reduced, the wheel load fluctuation can be reduced, and the running stability can be improved.

Further, in the above-described drive device for a railway vehicle according to the present invention, one end of a hollow rotating shaft, a pair of joint hubs which are respectively fitted to the axle, and both end portions of these joint hubs. In the case where a joint composed of a link having one end connected to each other via an elastic body and an intermediate body connected to the other end of the link via an elastic body, an axle and Since the relative displacement caused by the spring between the main motors can be effectively absorbed, the shaft spring can be softened and the riding comfort is improved.

Further, instead of the axle, a joint hub fitted to the axle is fitted to a wheel attached to the axle, or a rotatable bush is used instead of the elastic body. If a rotating shaft formed in a hollow and a joint hub fitted to one end of the rotating shaft are integrally formed, or a wheel and a joint hub fitted to the wheel are integrally formed,
The joint can be simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a railway vehicle drive device according to the present invention as viewed from the front and showing a partial cross section.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a cross-sectional view of the structure of the joint portion of the railway vehicle drive device of the present invention, as viewed from the front.

FIG. 4 is a view of FIG. 3 viewed from a side.

FIG. 5 is a side view of main components of a joint of the railway vehicle drive device according to the present invention, in which (a) is a main motor-side joint hub, (b) is a link, and (c) is a link. Intermediate, (d)
FIG. 3 is a view showing a coupling hub on the axle side.

FIG. 6 is an explanatory view when a joint hub, which is a component of the railway vehicle drive device of the present invention, is fitted to wheels.

FIG. 7 is an explanatory view in a case where an elastic body which is a component of the joint portion of the railway vehicle drive device of the present invention is changed to a bush.

FIG. 8 is an explanatory view of a case where a hollow rotary shaft and a joint hub, which are components of the railway vehicle drive device of the present invention, are integrally formed.

FIG. 9 is an explanatory view of a case where a joint hub, which is a component of the railway vehicle drive device of the present invention, is integrally formed with a wheel.

FIG. 10 is an explanatory view of a conventional railway vehicle drive device.

FIG. 11 is an explanatory view showing another example of the conventional railway vehicle drive device.

[Explanation of symbols]

 Reference Signs List 11 main motor 11a hollow rotary shaft 12 bogie frame 13 axle 14 joint 14a joint hub 14d joint hub 14g elastic body 14h link 14i intermediate body 14k elastic body 15 wheel 17 shaft spring 18 bush

Claims (6)

[Claims] In a driving device for a railway vehicle, a rotating shaft of a main motor is formed in a hollow, and the hollow rotating shaft is coaxially arranged with an axle and is externally fitted to the axle. , While fixing the main motor above the shaft spring,
A drive device for a railway vehicle, wherein one end of the hollow rotary shaft and an axle are connected via a joint. 2. A joint comprises a pair of joint hubs which are respectively fitted to one end of a hollow rotary shaft, an axle, and both ends of these joint hubs via elastic bodies. The railway vehicle drive device according to claim 1, wherein the link is connected at one end, and the other end of the link is constituted by an intermediate body integrally connected via an elastic body. 3. The railway vehicle drive device according to claim 2, wherein the joint hub fitted to the axle is fitted to a wheel attached to the axle instead of the axle. 4. The railway vehicle drive device according to claim 2, wherein a rotatable bush is used instead of the elastic body. 5. The drive device for a railway vehicle according to claim 2, wherein a hollow rotary shaft and a joint hub fitted to one end of the rotary shaft are integrally formed. . 6. The railway vehicle drive device according to claim 3, wherein a wheel and a joint hub fitted to the wheel are integrally formed.