JP2003220944A - In-wheel motor for rolling stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-wheel motor that can reduce a wheel diameter and appreciable relieves a shock transmitted to a main motor. <P>SOLUTION: The in-wheel motor for use in rolling stock has the main motor arranged in a rotation center part of an iron wheel. An outer circumference of a main motor case is wrapped with an elastic body of a synthetic resin in the form of a rubber plate or the like, an annular air spring, or a viscoelastic gel, and a steel tire is fitted on an outer side of the elastic body. This provides a means for preventing direct transmission of a vibration that the steel tire receives from a rail, to the main motor. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-wheel for a railway vehicle, in which a main motor is disposed at a rotation center portion of an iron wheel without using a gear device, which is used in a railway vehicle. It relates to a motor. 2. Description of the Related Art As means for transmitting rotation of a main motor to wheels, a method using a gear device has been widely adopted. In recent years, with the development of a low-floor tram, the necessity of downsizing of a traveling device has increased, and an in-wheel motor, in which a main motor is directly disposed at a rotation center portion of wheels without a gear device, is adopted. It has become. In this method, since the main motor is directly mounted on the wheels, elastic wheels are often employed to prevent the impact from the rail from being directly transmitted to the main motor. FIG. 4 shows an in-wheel motor using elastic wheels as a conventional technique. In the figure,
1 is a main motor, 2 is an elastic body, 3 is an iron tire, and 7 is a wheel disk. A rubber plate is used as the elastic body. [0003] In this technique, since the elastic body 2 and the iron tire 3 are installed outside the main motor via the wheel disk portion 4 and further outside the wheel disk portion 4, the wheel diameter is reduced. It was difficult to reduce the size, and it was difficult to lower the floor height of the vehicle. The solution of this drawback is the task imposed on the present invention. [0004] In order to solve the above-mentioned problems, the present invention wraps the outer periphery of the outer box of the main motor with an elastic body of a synthetic resin such as a rubber plate, and places iron on the outside of the elastic body. The tire is worn. Further, an annular air spring is used as an elastic body surrounding the outer periphery of the outer periphery of the main motor box, and an iron tire is put on the outside of the annular air spring. Further, a viscoelastic gel is used as an elastic body wrapping the outer periphery of the outer box of the main motor, and a structure is adopted in which an iron tire is covered on the outside of the viscoelastic gel. ADVANTAGE OF THE INVENTION According to this invention, a favorable vibration-proof effect is obtained with a wheel with a small diameter, and it is easy to make the floor height of a vehicle low. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a perspective view showing a first embodiment of the present invention. FIG. 1B is a cross-sectional view taken along the line AA shown in FIG. In this embodiment, the outer periphery of the main motor 1 is wrapped around the elastic body 2 without passing through the wheel disk 7, and the iron tire 3 is directly fitted on the outside of the elastic body 2. For example, a rubber plate is used as the elastic body. As the material of the rubber plate, ordinary synthetic rubber or the like may be used, but it is also possible to use rubber containing closed cells, such as "Neoprene" (trade name). In the present embodiment, the impact that the iron tire 3 receives from the rail 6 is reduced by the elastic body 2 in the process of being transmitted to the main motor 1. FIG. 2A is a perspective view showing a second embodiment of the present invention. FIG. 2 (b) is a cross-sectional view of FIG.
It is sectional drawing of the B line arrow direction. In the present embodiment, an annular air spring 4 is used as an elastic body, and the outer periphery of the main motor 1 is wrapped around the annular air spring 4 without passing through the wheel disk portion 7. Iron tire 3 is directly attached. In the present embodiment, the impact that the iron tire 3 receives from the rail 6 is reduced by the annular air spring 4 in the process of being transmitted to the main motor 1. FIG. 3A is a perspective view showing a third embodiment of the present invention. FIG. 3B is a diagram illustrating the C-C shown in FIG.
It is sectional drawing of the C line arrow direction. In this embodiment, for example, a viscoelastic gel 5 referred to by a trade name such as “Sorbosane” or “gel” is used as the elastic body, and the outer periphery of the main motor 1 is viscous without passing through the wheel disk 7. Wrapped in the elastic gel 5, the iron tire 3 is directly fitted on the outside of the viscoelastic gel 5. In the present embodiment, the impact that the iron tire 3 receives from the rail 6 is reduced by the viscoelastic gel 5 in the process of being transmitted to the main motor 1. According to the in-wheel motor of the present invention, the diameter of the wheel is reduced because only the elastic body is interposed between the main motor and the iron tire without the intervention of the wheel disk. It is possible. Further, a general rubber plate can be used as the elastic body. However, by using a rubber plate containing closed cells, an annular air spring, a viscoelastic gel, or the like, it is possible to further reduce the impact transmitted to the main motor. When the present invention is applied to a tram, the wheel diameter can be reduced without having a gear device, and the floor height can be reduced.

[Brief description of the drawings] FIG. 1 is a perspective view and a sectional view showing a first embodiment. FIG. 2 is a perspective view and a sectional view showing a second embodiment. FIG. 3 is a perspective view and a sectional view showing a third embodiment. FIG. 4 is a perspective view and a sectional view showing a conventional technique. [Explanation of symbols] 1 Main motor 2 Elastic body 3 iron tires 4 Annular air spring 5 Viscoelastic gel 6 rails 7 Wheel disk 8 Plate

Claims (1)

Claims: 1. An in-wheel motor for use in a railway vehicle, in which a main motor is arranged at a rotation center portion of an iron wheel, an outer periphery of a main motor outer box is formed of a synthetic resin such as a rubber plate or a ring. A railway wrapped with an elastic body of an air spring or a viscoelastic gel, covered with an iron tire outside the elastic body, and a means for preventing vibration received by the iron tire from the rail from being directly transmitted to the main motor. In-wheel motor for vehicles.