JPH0655924U - Railway vehicle power plant - Google Patents

Abstract

(57) [Abstract] [Purpose] The main motor rotor shaft and the gear device small gear shaft are integrated, and the flange portion 2m provided on the output shaft side end surface of the frame 2f of the main motor 2 and the gear box of the gear device 3 are integrated. A railway vehicle in which the main motor 2 and the gear device 3 are integrated by fastening the flange part 3c provided on the small gear part 3b with a fastening member to cantilever the main motor 2 to the gear device 3. 3D of power plant for power plant with simple structure and disassembly and assembly
It is an object of the present invention to provide a railway vehicle power unit that can be easily disassembled and assembled in a short time without interference between the tooth tips of the bearing and the bearing inner ring 2d ₂ . [Structure] The inner ring 2d ₂ of the NU type cylindrical roller bearing 2d supporting the shaft end 2b of the shaft 2a in which the main motor rotor shaft and the gear device small gear shaft are integrated is omitted, and the omitted cylindrical roller is omitted. It is characterized in that the outer peripheral surface of the pinion shaft is used as a substitute for the rolling surface of the inner ring 2d ₂ of the bearing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention also relates to a power unit for a railway vehicle in which a main motor is cantilevered to a gear unit and the main motor and the gear unit are integrated so that the railcar can travel.

[0002]

[Prior art]

 In recent years, in a power plant for railway vehicles, a structure has been developed in which a gear unit is provided with a flange portion and is engaged with the flange portion provided on the output shaft side end surface of the frame of the main electric motor so that the main electric motor cantilevers on the gear device. ing. As a result, the shaft of the small gear of the gear unit and the shaft of the main motor can be integrated, and the flexible joint between the small gear shaft and the main motor shaft can be omitted.

[0003]

[Prior art]

 FIG. 2 is a cross-sectional view of an essential part of an example of a conventional railroad vehicle power plant of this type, and FIG. 3 is a side view of the device seen from the gear box side with wheels removed. A small gear 3a is provided on the output shaft end 2b of the shaft 2a of the main motor 2 and bearings 2c and 2d are installed at both ends of the shaft, and a bearing 2e is installed between the main motor 2 and the small gear 3a. The shaft 2a is supported at three locations. Of these three bearings, the bearing 2d on the pinion shaft end side uses a NU type cylindrical roller bearing.

A flange portion 2m that engages with the flange portion 3c provided on the small gear portion of the gear box 3b of the gear device 3 is provided on the end surface of the frame 2f of the traction motor 2 on the output shaft end side, and the flange portions are joined together. The main motor 2 is configured to be cantilevered by the gear box 3b. The outer ring of the NU type cylindrical roller bearing 2d provided at the end of the shaft 2a on the side of the small gear 3a is represented by 2d ₁ , and the inner ring is represented by 2d ₂ .

Bearings 3e and 3f face each other on both sides of a large gear 3d that meshes with small gear 3a and is press-fitted onto axle 4, while gear box 3b is axially supported while the small gear side of gear box 3b is The suspension device 6 is configured to be suspended on the carriage 1.

The rotational force of the main motor 2 is transmitted to the wheels 5 via the axle 4 via the large gear 3d meshing with the small gear 3a provided on the shaft 2a.

[0007]

[Problems to be solved by the device]

As shown in Fig. 2, the conventional power plant for railway vehicles supports the shaft 2a by a NU type cylindrical roller bearing, but the cylindrical roller bearing used for the pinion side shaft end also has a large load when the vehicle is driven. In order to withstand the above, a bearing of a considerable size must be used, and when the main motor 2 is pulled out or inserted straight in the axial direction during disassembly and assembly, the tooth tip portion of the large gear 3d and the bearing inner ring 2d ₂ interfered with each other, making disassembly and assembly work difficult and taking a long time.

The present invention was devised in view of the above-mentioned points, and has a simple structure and does not interfere with the tooth tip portion of the large gear 3d and the bearing inner ring 2d ₂ during disassembly and assembly, and the work is easy. It is an object of the present invention to provide a railway vehicle power plant that can be disassembled and assembled in a short time.

[0009]

[Means for Solving the Problems]

 The railway vehicle power unit according to the present invention integrates the main motor rotor shaft and the gear device small gear shaft into a single unit, and has a flange portion provided on the output shaft side end surface of the main motor frame and a small gear box of the gear device. A railway vehicle power unit in which the main electric motor and the gear unit are integrated is configured by fastening the flange portion provided on the gear unit with a fastening member so that the main electric motor cantilevers on the gear unit. The inner ring of the NU type cylindrical roller bearing that supports the small gear side shaft end of the shaft in which the rotor shaft and the gear device small gear shaft are integrated is omitted, and the rolling surface of the inner ring of the omitted cylindrical roller bearing is substituted. The feature is that it is configured to use the outer peripheral surface of the pinion shaft.

[0010]

The power unit for railway vehicles according to the present invention eliminates the inner ring of the cylindrical roller bearing that supports the shaft end on the small gear side of the shaft in which the main motor rotor shaft and the gear device small gear shaft are integrated, and the function thereof is eliminated. Since the shaft of the small gear itself is provided, the tooth tip of the large gear does not interfere with the bearing inner ring during disassembly and assembly, and the shaft of the main motor can be easily pulled straight out or inserted in the axial direction. Will be possible.

[0011]

【Example】

FIG. 1 is an enlarged sectional view of a pinion side shaft end portion of an embodiment of a railway vehicle power unit according to the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals. As the bearing 2d for supporting the shaft end 2b on the pinion side, only the outer ring 2d ₁ of the NU type cylindrical roller bearing and the rollers held by it are used, and the inner ring is omitted, and the shaft end 2b of the pinion 3a itself is omitted. The outer peripheral surface is made to function instead of the rolling surface of the inner ring of the cylindrical roller bearing.

A bearing other than the bearing 2d that supports the shaft end 2b on the side of the small gear, that is, a bearing 2c that supports the shaft end on the side opposite to the small gear and the shaft is supported between the main motor 2 and the gear device 3. As for the bearing, although not shown, the inner ring may be omitted, and the outer peripheral surface of the shaft may substitute the function of the rolling surface of the inner ring.

[0013]

[Effect of device]

 As shown in Fig. 1, the inner ring of the bearing 2d on the small gear side was omitted, so the outer diameter of the small gear shaft is less than the root diameter of the small gear 3a. Even if it is pulled straight out, there is no interference between the tooth tops of the large gear 3d and the inner ring of the bearing 2d, which simplifies the structure of this part of the gear unit 3 and facilitates disassembly and assembly work. Therefore, the working time can be shortened.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a pinion side shaft end portion of an embodiment of a railway vehicle power plant according to the present invention.

FIG. 2 is a cross-sectional view of an essential part of an example of a conventional power plant for railway vehicle.

FIG. 3 is a side view of the device of FIG. 2 as seen from the gear box side with wheels removed.

[Explanation of symbols] 1 bogie 2 main motor 2a shaft 2b output shaft end 2c bearing 2d output shaft end bearing 2d ₁ bearing outer ring 2d ₂ bearing inner ring 2e bearing 2f frame 2m flange 3 gear unit 3a small gear 3b gearbox 3c Flange 3d Gears 3e, 3f Bearing 4 Axle 5 Wheel 6 Lifting device

Claims (1)

[Scope of utility model registration request] 1. A flange portion provided on an output shaft side end surface of a frame of a main electric motor and a flange portion provided on a small gear portion of a gear box of a gear device by integrating a main motor rotor shaft and a gear device small gear shaft. And a gear unit for supporting the main motor in a cantilevered manner, wherein the main motor and the gear unit are integrated into a power unit for a railway vehicle, wherein the main motor rotor shaft and the gear unit are provided. The inner ring of the NU type cylindrical roller bearing that supports the small gear side shaft end of the shaft integrated with the small gear shaft is omitted, and the outer circumference of the small gear shaft is used as a substitute for the rolling surface of the inner ring of the omitted cylindrical roller bearing. A power plant for a railway vehicle, which is configured to use a surface.