JP2701232B2 - A device for hanging the electric motor of the main motor on the axle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for suspending an electric vehicle main motor on an axle, wherein the main motor is supported on an axle via a pair of tapered roller bearings at both ends by a suspension tube.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing a conventional device for hanging a main motor of an electric vehicle on an axle using a tapered roller bearing. Reference numeral 1 denotes a main motor, and a small gear 4
Is shrink-fitted. 2 is a frame of the main motor 1, 5 is an axle, and wheels 6 are fixed to both sides. 7 is a large gear pressed into the axle 5 and meshed with the small gear 4, 8 is a gear box,
Reference numeral 9 denotes a suspension tube supported on the axle 5 via a pair of tapered roller bearings 10 at both ends, and the frame 2 of the main motor 1 is attached to the suspension tube. 14 is a bearing retaining ring shrink-fitted on the axle 5,
Reference numeral 15 denotes a bogie frame, which supports the frame body 2 on the side opposite to the suspension tube 9.

FIG. 4 is an enlarged sectional view of a portion A in FIG. The tapered roller bearing 10 includes an outer ring 11 and a plurality of tapered rollers 12.
And the inner ring 13. Reference numeral 16 denotes a plurality of shims for adjusting a play E in the radial direction of the tapered roller 12 with respect to the outer ring 11, and 17 denotes a cup carrier which supports the outer ring 11 and is fitted to the inner diameter of the bearing box 9a at one end. The shim 16 is received at the outer diameter of the cylindrical portion. Reference numeral 18 denotes a bearing cover attached to one end of the bearing box 9a via a shim 16 and a cup carrier 17 with a tightening bolt 19.

[0004] The shim 16 is shown in FIG. The plurality of shims 16 made of a thin metal plate are divided into two semicircles, and when the fastening bolt 19 is removed, the number of the shims 16 is adjusted by pulling out extra shims 16 in the radial direction as necessary or by additionally inserting them. I am trying to.

[0005] The operation of the above conventional device is as follows.
The rotation of the main motor 1 is reduced from the small gear 4 to the large gear 7 and transmitted to the axle 4. In order to maintain the engagement of both gears with high precision, the motor shaft center line B is
The main motor 1 is mounted on the axle 4 via a suspension tube 9 and a pair of tapered roller bearings 10 so that the distance and the parallelism are accurately maintained. Both roller bearings 10 support the weight of the main motor 1 and the meshing reaction force of the small gear 4 as radial loads, and also generate a force generated by centrifugal force and vibration of the main motor 1 when the vehicle passes on a curved road. Is supported as a thrust load.

In order to prevent the axle 4 from being bent or the suspension tube 9 from being thermally expanded in the axial direction due to the heat transmitted from the main motor 1, the tapered roller bearing 10 is prevented from being twisted.
A predetermined play clearance E is previously provided between the tapered rollers 12 and the outer rings 11 and 13 of the bearings. If the play clearance E is too small, the tapered roller bearing 10 is twisted and burns out due to excessive heat generation. Also, if it is too large, the tapered roller
The impact force due to the collision between the inner ring 12 and the inner and outer rings 13 and 15 increases, and the life of the tapered roller bearing 10 is significantly reduced. To cope with this, a plurality of shims 16 are inserted between the end of the bearing housing 9a and the flange 17b of the cup carrier 17, and the number of the shims 16 is adjusted so that the cup carrier 17 is displaced in the axial direction. The play clearance E is adjusted.

When adjusting the number of the shims 16, the adjustment range of the play clearance E is very narrow (normally 0.1 to 0.2 mm). Therefore, when inserting the shim 16, first remove the fastening bolt 19,
A very thin shim 16 had to be inserted while applying force to pull the cup carrier 17 slightly toward the wheels 6. For this reason, the shim 16 does not enter the predetermined gap well and is damaged, which makes the insertion operation extremely difficult.

[0008]

In the conventional device for hanging a main motor on an axle as described above, a very thin clearance E between the tapered rollers 12 of the tapered roller bearing 10 in the radial direction is adjusted. It is necessary to insert the shim 16 of the metal plate into the gap only for the adjustment margin, which is an extremely troublesome operation, and there are problems such as the shim 16 being bent and damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a device for hanging an electric vehicle main motor on an axle, in which the number of sheets can be adjusted without damaging the shim and adjustment work can be easily performed. The purpose is to get.

[0010]

According to the present invention, there is provided a device for hanging a main motor on an axle, comprising a shim receiving ring provided with a cylindrical portion and a flange portion, wherein a plurality of shims made of a thin metal plate are provided.
The shim holding plate, the shim, and the shim and shim holding plate assembly are divided into two semicircles. The carrier is fitted to the outer diameter portion of the cylindrical portion, and is sandwiched between the flange portion of the cup carrier and one end of the bearing box at one end of the suspension tube.

[0011]

According to the present invention, the shim is formed into a two-part cut ridge by a combination of a shim receiving ring and a shim holding plate. The fastening bolt is removed from the bearing cover, and the assembly is taken out in the radial direction. The number of shims can be easily adjusted externally, and the work of adjusting the radial play clearance of the tapered rollers becomes easy.

[0012]

FIG. 1 is a sectional view corresponding to a portion A of FIG. 3 showing a main part of a device for hanging an electric vehicle main motor on a main shaft according to the present invention. ~ 19, 9a, 17a, 1
7b is the same as FIG. Reference numeral 21 denotes a shim receiving ring including a cylindrical portion 21a and a flange portion 21b. The outer diameter portion of the collar portion 21b is larger than the outer diameter portion of the bearing box portion 9a at one end of the suspension tube 9, and is arranged in a radial direction. It is easy to take it out. 22 is made of a thin metal plate, and has a cylindrical portion 21a of a shim receiving ring 21.
A plurality of shims fitted to the outer diameter portion, 23 is a shim holding plate for being fitted to the outer diameter portion of the cylindrical portion 21a of the shim receiving ring 21 and applied to the outer end of the shim 22 to be clamped against the collar portion 21b. is there. The assembly of the shim receiving ring 21, the shim 22, and the shim holding plate 23 is divided into two semicircles. The assembly is fitted on the outer diameter of the cylindrical portion 17a of the cup carrier 17, and the flange 17b of the cup carrier 17 and one end bearing It is sandwiched between the end of the box portion 9a and attached to the end of the bearing box portion 9a via a bearing cover 18 by a tightening bolt 19.

Shim receiving ring 21, shim 22, and shim holding plate 23
Are each divided into two semicircles as shown in FIG. Thus, these assemblies can be radially attached and detached while being joined in a semicircle.

In order to adjust the radial play clearance E of the tapered rollers 12 of the tapered roller bearing 10, the following procedure is performed. First, the fastening bolt 19 is removed. Cup carrier 17 with wheels 6
While pulling a little toward the side, grasp the protruding flange 21b of the shim receiving ring 21, and pull out one half of these assemblies including the shim 16 and the holding plate 23 in the radial direction. While pulling, pull out the other half of the assembly in the radial direction. In the state of these extracted assemblies, the shim 16 is adjusted by adding or withdrawing.
Assemble the adjusted semicircular assemblies in their original positions. Thus, adjustment of the number of shims 16 can be easily performed without damage.

[0015]

As described above, according to the present invention, a plurality of shims made of a thin metal plate are fitted on the outer periphery of the cylindrical portion of the shim receiving ring consisting of the cylindrical portion and the brim portion, and the shim holder is held from the outer end. These assemblies are divided into two half-circles, and this assembly is fitted on the outer periphery of the cylindrical portion of the cup carrier, and the flange portion of the cup carrier and the end of the bearing box at one end of the suspension tube. The semi-circular assembly can be taken out in the radial direction and the number of shims can be easily adjusted without damaging the shim of the thin metal plate.
Adjustment work is easily and promptly performed.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view corresponding to a portion A in FIG. 3 showing a main part of a device for hanging an electric vehicle main motor on an axle according to the present invention.

FIG. 2 is an exploded perspective view of the shim assembly shown in FIG. 1;

FIG. 3 is a cross-sectional view illustrating a conventional device for hanging an electric vehicle main motor on an axle.

FIG. 4 is an enlarged sectional view of a portion A in FIG. 3;

FIG. 5 is an exploded perspective view of the shim of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main motor 2 Frame 5 Axle 9 Suspension tube 9a Bearing box 10 Tapered roller bearing 11 Outer ring 12 Tapered roller 17 Cup carrier 17a Cylindrical part 17b Collar 18 Bearing cover 19 Tightening bolt 21 Shim receiving ring 21a Cylindrical part 21b Collar 22 Shim 23 Shim holding plate

Claims (1)

(57) [Claims] 1. A suspension tube which is supported on an axle via tapered roller bearings of bearing boxes at both ends and has a frame of a main motor mounted thereon, a cylindrical portion and an outer end flange portion, and an outer diameter portion of the cylindrical portion. Is inserted into the inner diameter of the bearing box at the one end, a cup carrier in which the outer ring of the one tapered roller bearing is fitted to the inner diameter of the cylindrical portion, and a thin metal plate. A plurality of shims sandwiched between the collar portion of the cup carrier and a bearing cover applied to the outer edge of the collar portion of the cup carrier and tightening the shim to the end of the bearing box via the cup carrier by a tightening bolt; In the device for hanging the tapered roller of the tapered roller bearing in the radial direction by adjusting the number of the shims, a device for hanging the main motor on the axle, from the cylindrical portion and the flange portion at one end. Become A shim in which the inner diameter portion of the cylindrical portion is fitted to the outer diameter portion of the cylindrical portion of the cup carrier, the collar portion is applied to the one end of the bearing box, and the plurality of shims are fitted to the outer diameter portion of the cylindrical portion. Applied to the outer edge of the receiver and shim,
The inner diameter portion is fitted on the outer diameter portion of the cylindrical portion of the shim receiver, and is provided with a shim holding plate pressed by the brim portion of the cup carrier. A device for hanging an electric vehicle main motor on an axle, which is divided and made detachable in a radial direction.