JPH09263242A - Carriage for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain wear to a wheel tread and thermal deformation of a wheel when braking is applied by disposing a brake disc means at the outer periphery on the rotor side of a driving motor. SOLUTION: The rotor 14 of a driving motor 15, brake discs 16a, 16b and wheels 6a, 6b are integrally-formed for rotational movement around an axle 5. At the time of braking operation, the brake discs 16a, 16b are suppressed by the pneumatic or hydraulic cylinder of braking devices 17a, 17b fixed on a carriage frame 1 to suppress the rotation of the wheel. Braking is prevented from being applied directly to the wheels 6a, 6b, therefore, reduction in the friction of a wheel tread, and suppression of the wheel from thermal deformation due to heat addition can be conducted. As a result, reduction in the weight of the wheel and the axle in an unsprung condition can be attained, thus it is possible to relieve impact onto an orbital rail 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railcar bogie, and more particularly to a direct drive bogie for a railcar in which left and right wheels of each axle can rotate integrally with a drive motor.

[0002]

2. Description of the Related Art As shown in FIG. 9, a conventional bogie for a railroad vehicle uses the power generated by a power source such as an electric motor to drive left and right wheels 6.
a, 6b is transmitted to the mounted axle 5, and wheels 6a, 6b
It travels by the frictional force between the rail and b In such a dolly, the rotational speed of the drive motor 3 is set higher than the rotational speeds of the wheels 6a and 6b, and the rotation is transmitted to the wheel shafts 5 by the power transmission device 4 including the reduction gear and the transmission shaft. This trolley brake device is of a type that suppresses rotation of a brake disc 7 that rotates integrally with a wheel shaft 5 by a caliper brake 8 fixed to the trolley frame 1 side. Also,
Another braking device, as shown in FIG.
In order to suppress the rotation of a and 6b, a tread brake 9 fixed to the bogie frame 1 side applies a braking force in the front-rear direction to the wheel tread to suppress wheel rotation.

Since the above-mentioned drive system has a power transmission device using gears, power loss and noise generation accompanying power transmission and maintenance of worn parts such as gears are required. For this reason, a direct drive type bogie for railway vehicles, which is supported by independent wheels, is disclosed in Japanese Patent Laid-Open No. 5-16800. This dolly has a structure in which the wheels and the driving electric motor are integrated to omit the power transmission device to prevent the above-mentioned problems caused by the power transmission device.

[0004]

In the above-mentioned prior art, a tread brake system can be considered as a direct drive system in which a wheel and a driving electric motor rotate integrally. However, since the braking force is directly applied to the tread surface, wear of the wheel tread surface is increased and frictional heat is directly transmitted to the wheel, which causes large thermal deformation. As a measure against wheel thermal deformation, it is necessary to improve the rigidity of itself.
It was difficult to reduce the weight of unsprung wheels and axles. In order to reduce the unsprung weight and reduce the impact force on the rails of the track, a direct drive device for railway vehicles, in which the wheels and drive motor can rotate integrally, requires a brake device that does not affect the wheels. Became.

An object of the present invention is to provide a bogie for a rail vehicle which can suppress wear of a wheel tread and thermal deformation of a wheel when a brake is applied.

[0006]

In order to achieve the above object, a stator of a driving motor mounted around a fixed axle via a bearing and a rotor of the driving motor are mounted integrally with a wheel. In the railcar bogie, brake disc means is provided on the outer peripheral surface of the driving electric motor on the rotor side so that the acting force at the time of braking is applied in the left-right direction. Further, in order to reduce the thermal influence on the brake disc means and the brake device, the pipe is configured to supply the motor cooling water to the brake device.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a railcar bogie according to the present invention will be described below with reference to FIGS. FIG. 1 shows the structure of the entire bogie and is a cross-sectional view at the axle centerline position. In FIG. 1, the axle 5 is fixed to the bogie frame 1 via a shaft spring 10. Wheels 6a, 6b are bearings 20
It has a structure that can be attached to the axle 5 via. The inner surface of the wheel 5 has a cylindrical rotor 14 of a driving electric motor 15.
Are joined by welding, screwing or the like directly or via a vibration absorbing material. On the axle side facing the rotor 14,
An armature 12 of a drive motor 15 composed of an iron core and a coil 13 is attached, and an appropriate gap is provided between the rotor 14 and the armature 12. 16a and 16b are
It is a brake disc attached to the outer peripheral surface of the driving electric motor 15 near the wheels 6a and 6b. 17a, 17b
Is attached to the bogie frame 1, and the brake disc 16
This is a brake device that performs a braking operation by suppressing a and 16b in the left and right directions by pneumatic or hydraulic cylinders.
FIG. 2 shows a detailed mounting structure of the brake disc 16b, and FIG. 3 shows an AA view from the side of the brake disc. As shown in FIGS. 2 to 3, there is a fastening structure in which the brake disc 16b is sandwiched by the wheel fixing bolts 24a and the like. The brake disc 16
A heat insulating material may be sandwiched between a and the wheel 6b and fastened with the bolt 24a.

In such a structure, the driving electric motor 1
The five rotors 14, the brake discs 16a and 16b, and the wheels 6a and 6b integrally rotate about the axle 5. During the braking operation, the brake discs 16a and 16b are suppressed by the pneumatic pressure or hydraulic cylinders of the brake devices 17a and 17b fixed to the bogie frame 1 side, and the rotation of the wheels is suppressed. Since the wheels 6 are not directly braked in this way, it is possible to reduce the wear of the wheel treads and suppress the thermal deformation of the wheels due to the addition of heat. For this reason,
The wheels and axles that are unsprung can be made lighter,
The impact force on the track side rail 11 can be mitigated. Further, by applying the braking force in the left-right direction, the vertical impact force on the track can be further reduced.

Next, the second embodiment of the railcar bogie according to the present invention.
An embodiment will be described with reference to FIGS. In the figure, the same reference numerals as in the first embodiment denote the same members. The difference between this embodiment and the first embodiment is that the brake disks 18a and 18b are provided on the outer periphery of the drive motor 15 near the rotor 14. The detailed mounting structure is shown in FIG. 5. The structure is such that the brake disc 18b is fixed to the side surface of the driving electric motor 15 by the fastening bolts 25a and the like. As a result, the lateral distance between the wheel 6b and the brake disc 18b can be further secured, and thermal deformation of the wheel due to heat addition can be suppressed, so that the unsprung weight can be further reduced.

Next, the third embodiment of the railcar bogie according to the present invention.
An embodiment will be described with reference to FIG. In the figure, the same reference numerals as in the first embodiment denote the same members. The difference between this embodiment and the first embodiment is that a brake disk 26 is provided at one location on the outer peripheral surface of the drive motor 15 near the left-right center, and the brake device 21 is provided at the corresponding position of the bogie frame 1.
Is installed. As a result, the lateral distance between the wheel 6a or the wheel 6b and the brake disc 26 can be further secured as compared with the above-described embodiment, so that thermal deformation of the wheel due to heat addition can be significantly suppressed. Furthermore, the unsprung weight can be reduced. Further, the brake disc and the brake device can be simplified.

Next, the fourth embodiment of the railcar bogie according to the present invention.
An example will be described with reference to FIG. In the figure, the same reference numerals as in the first embodiment denote the same members. The difference between the present embodiment and the first embodiment is that the brake devices 23a, 2a provided with a hollow portion for cooling from a shaft end hollow portion for cooling the motor.
A pipe 22 is connected to 3b so that cooling water can be circulated. Therefore, the motor and brake device 2
The structure is such that 3a and 23b can be simultaneously cooled.

As a result, it is possible to reduce the influence of thermal deformation of the brake device and the disk device due to the addition of heat during brake operation.

FIG. 8 is a sectional view taken along the center line of the axle, showing the structure of the entire independent wheel type bogie in which a driving electric motor is integrally fixed to each wheel. As shown in the figure, the drive motors 15a, 1 corresponding to the wheels 6a, 6b, respectively.
5b has a structure in which each wheel can be rotated by 6a and 6b. Brake disc devices 16a and 16b are attached to the outer peripheries of the drive motors 15a and 15b, and the brake devices 17a and 17b fixed to the bogie frame 1 side can suppress the rotation of the wheels by the lateral suppression.
Since an independent drive motor is attached to each wheel, when the brake is applied, the rotation of the left and right wheels should be synchronized by the brake device based on the rotation pulse of each wheel or the signal such as the slip in the front-rear direction. You may

Although the bogie for the railway vehicle in which the wheels and the driving electric motor are integrated has been described above, this system may be applied to a bogie having a direct drive system with independent wheels supported.

[0015]

As described above, according to the present invention, in a bogie for a railway vehicle having an integrated structure of a wheel and a driving electric motor, it is possible to reduce wear of the wheel tread and suppress thermal deformation of the wheel due to heat addition. The unsprung weight can be reduced and the impact force on the rail of the track can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of a railcar bogie according to the present invention.

FIG. 2 is a cross-sectional view showing a detailed view of mounting the disk device according to the first embodiment of FIG.

FIG. 3 is a side view as seen from an AA section in FIG.

FIG. 4 is a cross-sectional view showing a second embodiment of a railcar bogie according to the present invention.

FIG. 5 is a cross-sectional view showing a detailed view of the disk device attachment of the second embodiment of FIG.

FIG. 6 is a cross-sectional view showing a third embodiment of a railcar bogie according to the present invention.

FIG. 7 is a sectional view showing a fourth embodiment of a railcar bogie according to the present invention.

FIG. 8 is a cross-sectional view showing a fifth embodiment of a railcar bogie according to the present invention.

FIG. 9 is a plan view showing a disc brake device in a conventional bogie for railway vehicles.

FIG. 10 is a plan view showing a tread surface braking device in a conventional bogie for railway vehicles.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bogie frame, 5 ... Axle, 6a, 6b ... Wheel, 10 ... Axle spring, 11 ... Rail, 12 ... Armature, 13 ... Coil, 14
... rotor, 15 ... drive motor, 16a, 16b ... brake disc, 17a, 17b ... brake device, 20 ...
Bearings, 22 ... Piping, 24a, 24b ... Fastening bolts.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kuniyoshi Hara 794 Azuma Higashitoyo, Kudamatsu City, Yamaguchi Prefecture Stock company Hitachi Ltd. Kasado Plant

Claims (4)

[Claims] 1. A stator of a driving electric motor mounted around a fixed axle via a bearing, and a bogie for a railway vehicle in which a rotor of the driving electric motor is connected to wheels, the rotor side of the driving electric motor. A railcar bogie having brake disc means arranged on the outer periphery of the railcar. 2. A railway vehicle truck according to claim 1, wherein a plurality of the brake disc means are installed on the rotor. 3. A railcar bogie according to claim 1, wherein an acting force at the time of braking is applied in the left-right direction. 4. A railcar bogie according to claim 1, wherein motor cooling water is circulated through the brake means.