JPH0640328A - Gear box suspension device for electric rolling stock - Google Patents

Abstract

PURPOSE:To facilitate length adjusting work of the suspension arm of a gear box suspension device for electric rolling stock. CONSTITUTION:A gear box suspension device is formed in such a structure as being equipped with a suspension seat 6A, which is separated from a truck frame 1A and on whose fitting surface knurls 21 are formed in the horizontal direction, an intermediate seat 22, which is located between the truck frame 1A and the above-mentioned suspension seat 6A and which has similar knurls as above-mentioned on its surface opposing to the suspension seat 6A, and a mounting seat 20, which has a step portion on its lower part to mount the suspension seat 6A and the intermediate seat 22 on the truck frame 1A, while the suspension seat 6A is provided with vertically long elliptic holes 19 and mounted on the intermediate seat 22 by means of bolts 18 inserted through the elliptic holes 19. Thus number of parts on the suspension arm side can be reduced and the suspension arm length adjustment work can be facilitated by moving the suspension seat up and down by means of loosening the bolts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear box suspension device for an electric vehicle.

[0002]

2. Description of the Related Art FIG.
FIG. 7 is a vertical cross-sectional view of a connecting portion of a conventional reduction gear box suspension device for an electric vehicle electric motor shown in Japanese Patent Publication to a dolly. In the figure, 7 is a suspension arm, 6 is a cart 1 for suspending the suspension arm 7.
Side hanging seat, 13 is a vibration isolating rubber which is vertically inserted into the hanging seat 6, 14 is a washer pressed against the antivibration rubber 13, 15 is a shim arranged on the washer 14, 16 is a shim A washer for pressing 15 together with the washer 14 is a nut for tightening all the above parts against the hanging seat 6.

Next, the operation will be described. FIG. 9 shows an electric motor 3 mounted on the bogie frame 1 in parallel with the axle 2 to the axle 2.
FIG. 3 is a plan outline view of a so-called electric motor-carriage-mounted parallel flexible drive device that transmits a rotational force via a flexible joint 5 to a reduction gear device 4 directly mounted on a bearing via a bearing. In this drive device, the flexure amount D of the shaft spring and the flexure amount C of the flexible shaft joint are set.
The following equation is established between the gear center distance A and the gear box mounting center distance B.

Equation 1. C = [(B−A) / B] × D ... 1

As can be seen from the above equation, in order to sufficiently reduce the flexure amount C of the flexible shaft coupling (hereinafter referred to as the flexure joint) with respect to the flexure D of the shaft spring, B should be brought close to A. By the way, it has the following obstacles.

FIG. 10 is a front external view of the reduction gear unit. The gear box 4a is attached to the axle 2 via a bearing on the side of the large gear 8 and is attached to the bogie frame 1 via the suspension arm 7 on the side of the small gear 9 to support the rotational reaction force.

As shown in FIG. 7, when the vehicle body is placed on the bogie 1, the shaft spring 11 is compressed and bent by the weight of the vehicle body. Since the electric motor is directly fixed to the bogie frame, it moves downward together with the bogie frame by exactly the same amount as the bending amount of the shaft spring, and the pinion center a shown in Fig. 10 is the ratio of the length from the suspension arm to the axle. That is, C is moved relative to the electric motor by the formula (1). Similarly, relative displacement occurs between the motor shaft and the center of the pinion due to vibrations of passengers getting on and off and traveling of the train. Therefore, when attaching the electric motor and the drive unit to the bogie, the center of the electric motor shaft should be set higher than the center of the pinion shaft in advance, and when the number of passengers is about the same, the axes of the suspension arms should match. Adjust the length. This is because the allowable torque transmission capacity increases as the flexure angle θ of the joint decreases, as described with reference to an example in which a gear coupling is used for the flexure joint as shown in FIG.

FIG. 5 is a vertical cross-sectional view of a connecting portion of a conventional gear box suspension device for an electric vehicle motor to a carriage. Hanging arm 7
Is connected to the gear box 4a shown in FIG. 10 by a spherical bearing at the bottom, and is rotatable in the left-right direction in FIG. The upper part of the hanging arm 7 has washers 14, 16 and shim 1
5, the suspension arm 6 is attached to the suspension seat 6 via the anti-vibration rubber 13 by tightening the threaded portion of the end of the suspension arm 7 with the nut 17. The anti-vibration rubber 13 is pre-compressed and assembled by the nut 17, so that the vibration of the gear box 4a shown in FIG. 10 is prevented from being transmitted to the trolley 1 shown in FIG.
It is possible to rotate a little around. Numerals 14 and 16 are washers, and numeral 15 is a horseshoe-shaped shim (spacer for spacing adjustment) as shown in FIG.

In order to adjust the length of the hanging arm in the thus constructed device, the lower shim 1 in FIG. 5 is used.
It suffices to insert and remove 5 and adjust it. Specifically, adjustment is performed by loosening the nut 17 and inserting and removing the lower shim 15 until the anti-vibration rubber 13 is in a non-compressed state. The shims for inserting and removing are procured from the upper shim 15 prepared in advance. The hanging seat 6 is the bogie frame 1 shown in FIG.
10 is a protrusion from the bogie frame 1 shown in FIG. 10, and the reinforcing ribs 6a shown in FIGS. 3 and 4 are integrated with the hanging seat 6 in order to maintain mechanical strength for supporting the gear box 4a shown in FIG. It is provided in. That is, it is the hanging seat rib 6a shown in FIG. The adjustment of the length of the suspension arm described above is performed in the state of the dolly as shown in FIG. 9, and sometimes with the vehicle body on the dolly, that is, in the state of the vehicle.

[0010]

Since the conventional electric vehicle box suspension device is constructed as described above, when adjusting the length of the suspension arm, for example, when there is no inspection window under the floor of the vehicle body, Since the work is directed upward, tightening nut 17
Is not visible, the loosening work is a hand-gripping work, and since the shim 15 has a shape as shown in FIG. 5, it is difficult to see the position of the opening, and it is difficult to insert and remove a small number of shims. There was a problem such as

The present invention has been made to solve the above problems, and a shim for adjusting the length of the suspension arm can be omitted, and the gear box for an electric vehicle can be suspended for upward work. The purpose is to provide a device.

[0012]

A gear box suspension device for an electric vehicle according to the present invention eliminates a shim on the suspension arm side, separates a suspension seat on the bogie side from a bogie frame, and determines the position of the suspension seat. ,
By providing elliptical holes at the four corners of the hanging seat, adjustment is possible in the vertical direction.

In order to achieve the same purpose, the mounting surface of the hanging seat is horizontally knurled, and the intermediate seat is knurled between the bogie frame and the hanging seat so as to face the knurl of the hanging seat. Attach.

[0014]

Since the suspension seat according to the present invention is separated from the bogie frame, the vertical position can be changed by utilizing the elliptical holes at the four corners of the suspension seat, and the length of the suspension arm can be adjusted. .

Further, by knurling the facing surfaces of the hanging seat and the intermediate seat, the positions of the knurls can be changed by vertically shifting the connecting position of the knurls, and the length of the hanging arm can be adjusted. In addition, the knurling can have a proof stress against a vertical load.

[0016]

【Example】

Example 1. FIG. 1 is a sectional view showing an embodiment of the present invention, and 13 and 16 and 17 are exactly the same as the above-mentioned conventional device. Reference numeral 1a is a screw hole for attaching the suspension seat 6A provided on the bogie frame 1A, and 6A is a suspension seat, which is provided on the mounting surface 4A.
The corner has an oblong hole 19 in the vertical direction. Reference numeral 18 is a bolt for attaching the suspension seat 6A to the bogie frame 1a.
The suspension arm 7A is shorter than that shown in FIG. 5 by the thickness without the shims and washers.

In the gear box suspension device for an electric vehicle constructed as described above, the suspension seat 6A can be moved up and down by releasing the tightening force of the mounting bolt 18 of the suspension seat 6A. It becomes possible to adjust the length of 7A. Further, since the hanging seat mounting bolt 18 is located at a position visible from below, the adjustment work and the upward work can be easily performed.

Example 2. FIG. 2 is a cross-sectional view showing another embodiment of the present invention, in which 20 is a mounting seat fixed on the bogie frame 1A and having a step portion below, and screw holes 20 are provided at four corners.
a is prepared. 6A is a hanging seat, and the knurling 21 processing is performed on the mounting surface in the horizontal direction at a pitch corresponding to the thickness of the shim in the conventional device, and elliptical holes 19 are provided at the four corners in the vertical direction. is doing. Reference numeral 22 denotes an intermediate seat arranged between the mounting seat 20 and the hanging seat 6A, and a surface facing the hanging seat 6A is subjected to the same knurling as the hanging seat 6A,
The four corners have circular holes 22a. Reference numerals 23 and 18 denote bolts for mounting the intermediate seat 22 and the hanging seat 6A, respectively.

In the gear box suspension device for an electric vehicle constructed as described above, the tightening force of the mounting bolt 18 of the suspension seat 6A is released to move the suspension seat 6A up and down with the knots as guides. As a result, the length of the suspension arm 7A can be adjusted. Further, since the hanging seat mounting bolt 18 is located at a position visible from below, the adjustment work and the upward work can be easily performed.

Example 3. Further, in the above-described embodiment, the case where the lower part of the suspension arm is connected to the gear box by the spherical bearing has been described, but the lower part of the suspension arm is connected via the anti-vibration rubber similarly to the upper part. May be obtained, and the same effect as that of the above-described embodiment is obtained.

[0021]

As described above, according to the present invention, the suspension seat of the gear box suspension device for an electric vehicle is configured as a separate type from the bogie frame, and the suspension seat is provided with an elongated oval hole in the vertical direction, Since the hanging seat is moved along the oval hole, there is an effect that the length of the hanging arm can be easily adjusted as compared with the conventional shim.

Further, the knurled one can more reliably hold the hanging seat.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a plan view showing a conventional hanging seat.

FIG. 4 is a side view showing a conventional hanging seat.

FIG. 5 is a cross-sectional view showing a conventional suspension device.

FIG. 6 is a plan view of a conventional shim.

FIG. 7 is a simplified side view of the vehicle.

FIG. 8 is a bending angle-torque diagram of a gear coupling.

FIG. 9 is a plan outline view of an electric carriage-mounted parallel flexible drive device.

FIG. 10 is a front external view of a conventional reduction gear device.

[Explanation of symbols]

 1A bogie frame 1a screw hole 6A suspension seat 7A suspension arm 18 mounting bolt 19 oval hole 20 mounting seat 20a screw hole 21 knurl 22 intermediate seat 22a hole 23 bolt

Claims (2)

[Claims] 1. A reduction gear device for a bogie for smoothly transmitting the rotational force of an electric car driving electric motor mounted on a bogie of an electric car to a reduction gear device mounted on an axle via a flexible shaft coupling. A suspension device for supporting the gear box and for suspending the gear box in a suspension device provided in the reduction gear device gear box for adjusting the axial center difference between the motor shaft center and the small gear shaft center of the reduction gear device. A gear for an electric vehicle, characterized in that the suspension seat supporting the trolley is separated from the trolley, and a vertically long elliptical hole is provided in the suspension seat, and a bolt is inserted into the elliptical hole and bolted to the trolley. Box hanging device. 2. The gear box suspension device for an electric vehicle according to claim 1, wherein the suspension seat has a knurled mounting surface on the dolly side.