JPH0655923U - 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 is configured to be cantilevered by the gear device 3 by fastening the flange portion 3c provided on the small gear portion 3b with a fastening member, and the main motor 2 and the gear device 3 are integrated. 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] As a bearing 2d that supports the small gear side shaft end 2b of the shaft 2a in which the main motor rotor shaft and the gear device small gear shaft are integrated, the inner ring outer diameter D ₂ is the root diameter D _{1 of the} small gear. It is characterized by using the following NU type cylindrical roller bearings.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention also relates to a railway vehicle power unit in which a main motor is cantilevered by a gear unit for traveling a rail vehicle, and the main motor and the gear unit are integrated.

[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.

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. This railcar power unit uses an N type cylindrical roller bearing as the bearing 2d on the pinion side shaft end.

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 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 thereof 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 that meshes 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 an N type cylindrical roller bearing, so when disassembling and assembling, pull out or insert the shaft of the main motor straight in the axial direction. also, interferes with rollers held in the tooth tip portion and the bearing inner ring 2d ₂ of the large gear 3d is exploded work has required difficult and much working 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. Use a NU type cylindrical roller bearing whose inner ring outer diameter is less than the root diameter of the small gear as a bearing that supports the small gear side shaft end of the shaft that integrates the rotor shaft and the gear device small gear shaft. Is characterized by.

[0010]

[Action]

 Since the NU type cylindrical roller bearing whose outer diameter is smaller than the root diameter of the small gear is used to support the small gear side shaft end, the tip portion of the large gear 3d and the bearing inner ring are used during disassembly and assembly. It is possible to pull out or insert the shaft straight in the axial direction without interference between and, and the disassembly and assembly work can be easily carried out.

[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. The bearing 2d of the shaft end of the pinion side and NU type, outer diameter D ₂ of the inner ring 2d ₂ is using those root circle diameter D ₁ hereinafter pinion 3a.

[0012]

[Effect of device]

As shown in FIG. 1, since the outer diameter of the inner ring 2d ₂ of the bearing 2d on the pinion side is less than the root diameter D _{1 of the} pinion 3a, the shaft 2c was pulled straight out in the axial direction during disassembly and assembly. Also in this case, the inner ring 2d _{2 of the} bearing 2d does not interfere with the tooth tip portion of the large gear 3d, the structure of this portion of the gear device 3 can be simplified, and the disassembling and assembling work becomes easy. , 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 gearbox 3a gear 3b gearbox 3c flange 3d large gear 3e, 3f Bearing 4 Axle 5 Wheel 6 Lifting device D ₁ Small root diameter of small gear D ₂ Outer diameter of inner ring of shaft end of small gear

Claims (1)

[Scope of utility model registration request] 1. A flange portion provided on an end surface of a main motor frame on the output shaft side, and a flange portion provided on a small gear portion of a gear box of a gear device, in which a main motor rotor shaft and a gear device small gear shaft are integrated. And a gear unit for supporting the main motor in a cantilevered manner, wherein the main motor and the gear unit are integrated in a railway vehicle power unit, wherein the main motor rotor shaft and the gear unit are provided. A railway vehicle characterized by using a NU type cylindrical roller bearing whose inner ring outer diameter is equal to or smaller than the root diameter of the small gear as a bearing for supporting the small gear side shaft end of the shaft integrated with the small gear shaft. Power plant.