JPS6323525A - Motor supporting device for electric rolling stock - Google Patents

Abstract

PURPOSE:To prevent the bearings of a main motor and a reduction gear from being electrically corroded due to a feedback current from rails by insulatively supporting the motor to a bogie frame. CONSTITUTION:The upper handing arm 7 of a main motor 6 is insulated from the upper support 2 of a bogie frame 1 by an insulating plate 20 engaged between a key 9 and the ring 7 and an insulating tube 22 engaged by an insulating washer 21 and a clamping bolt 10 contacted on the arm 7. The lower washer 8 of the motor 6 is insulated from the lower support 3 of the frame 1 by an insulating anvil 24 engaged between a lower support 3 and a lower washer 8 and an insulating tube 25 engaged with an insulating washer 25 and a clumping bolt 12 contacted with the washer 8. Accordingly, the motor 6 is insulatively supported by the frame 1 to prevent a feedback current from flowing at this part, thereby eliminating electric corrosion of bearings of the motor 6 and a reduction gear 15.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an electric motor support device for an electric vehicle in which a traction motor is supported on a bogie frame, and in particular relates to prevention of electrolytic corrosion of traction motor bearings and bearings of reduction gear devices. .

[Conventional technology]

FIGS. 1 and 2 are a plan view and a side view of main parts of a conventional electric motor support device shown in, for example, Electric Car Science, July 1984 issue, page 34 (published by Electric Car Research Association). Reference numeral 1 denotes a bogie frame, which is supported by an axle 4 via a spring means by a bearing (not shown), and is provided with an upper support part 2 and a lower support part 3.

Axle 4 has wheels 5 fixedly attached to it. 6 is a main electric motor supported by the bogie frame 1, and is provided with an upper arm and a lower support seat 8. The upper suspension arm 7 is engaged with the upper support part 2 via the Fi key 9, and the spring washer 11 is attached by PortoCo.
The lower support seat 8 is attached to the port 1.
2 is connected to the lower support part 3 through a spring washer 13; 14 is a joint attached to the rotating shaft of the motor; and 15 is a reduction gear device, which meshes with a small gear connected to the joint 14. A large gear fixed to an axle number (all not shown), a case 16 supported by the axle 4 via a bearing (not shown), and a bearing (not shown) that fully supports the shaft of the small gear in this case. (omitted). 17 is a rail.

In electric vehicles, current is collected from overhead wires using a pantograph, passed through a control circuit to the main motor, passed through a resistor, etc., passed from the ground terminal to the axle 4 via a ground brush, and is applied from the wheels 5 to the rails 17. That's what I do.

However, this return current (or reverse current due to regenerative braking) is transferred from the rail 17 to the next cycle Ii! 8 may flow.

Rail 17 → other wheel 5 → other axle 4 → bogie frame l →
Main electric motor 6→coupling 14→reduction gear device"-5→one axle 4→one wheel 5→rail 17 Also, the current force of the circuit from the other axle 4 to the one-force wheel 4 via each of the above-mentioned components The direction may be opposite to the above direction.

Such current may induce electrical damage to the bearings of the main motor 6 and the reduction gear system 15, resulting in damage.

[Problem that the invention seeks to solve]

In the conventional device as described above, the # current that is energized from the overhead wire and reaches the rail]-7 is transferred from the rail 17 to the wheels 51, the bogie frame, the traction motor 6. Reduction gear device 15° wheel 5. A circuit was formed in which the current flows to the rail]-7. Therefore, there was a problem in that current flowed through the bearings of the main motor 1 and the reduction gear 15 interposed in this circuit, causing electrolytic corrosion and damage. Ta.

This question was made in order to solve all of these problems, and it is possible to create an electric motor for electric vehicles that eliminates electrolytic corrosion of the bearings of the main motor and reduction gear device due to return current from the rail, and damage caused by this. Support equipment aims to earn money.

[Means for solving problems]

A motor support device for an electric vehicle according to the present invention connects the upper suspension arm and the lower support seat of the traction motor to the upper support portion and the lower support portion of the bogie frame through insulating members, respectively, and insulates the entire traction motor from the bogie frame. I supported it.

[Effect]

The main motor is insulated and supported on the bogie frame.

The return current circuit passing through the main motor, reduction gear, and axle is cut off, and no current flows through the bearings of the main motor and reduction gear, thereby preventing electrolytic corrosion.

〔Example〕

FIG. 1 is a side view of essential parts showing an embodiment of a main motor support device for an electric vehicle according to the present invention, and s1 to 1 are the same as the conventional device described in 1. 20 is an insulating bottom plate fitted between the key 9, 21 is an insulating seat plate placed on the upper arm 7, 22 is an insulating tube fitted to 0, and 23 is an insulating seat plate 21. It is a washer applied to the Further, 24 is an insulating bottom plate fitted between the lower support part 3 and the lower support seat 8, 25 is an insulating seat plate applied to the lower support seat 8, 26 is an insulating tube fitted to the bolt 12, 27 is a washer applied to the insulating seat plate 25. In this way, the upper suspension arm 7 is connected to the upper support part 2 through an insulating member and by means of bolts 10, and the lower support seat 8 is connected to the lower support part 3 through an insulating member by means of bolts 12.

In this way, the main motor 6 is insulated and supported by the bogie frame 1, and can be used as is by interposing an insulating member without changing the structure of the conventional bogie frame 1.

In the device of the above embodiment, the main motor 6 is insulated and supported by the bogie frame 1, and return current is prevented from flowing through this portion, and the bearings of the main motor 6 and the reduction motor 5 are electrolytically corroded. Never.

In addition, in the above example, the insulating tube 2 is attached to 10.
2, but the insulating tube 22 can be omitted if the diameter of the bolt hole in the insulating bottom plate 20 is made smaller and a gap is maintained between the bolt lO and the bolt hole in the upper hanging arm. . In addition, a counterbore is provided on the seat plate lower support seat 8 to position the insulating seat plate 25 in the radial force direction, and the bolt hole diameter of the insulating seat plate 25 is made smaller, and the mounting is done with bolts], 2 and the lower support seat 8. The insulating tube 26 can be omitted if a clearance is maintained between the bolt hole and the bolt hole.

〔Effect of the invention〕

As described above, according to the present invention, since the main motor is entirely insulated and supported on the bogie frame, the circuit of the return current passing through the main motor and the reduction gear device is cut off, and electrolytic corrosion of each bearing of both is prevented and damage is prevented. be lost.

[Brief explanation of the drawing]

FIG. 19 is a side view of the main parts of an embodiment of the traction motor support device for an electric vehicle according to the present invention, excluding the front wheel side; FIG. 2 is a plan view of the main parts of the conventional traction motor support device; The figure is a side view of the main parts of the apparatus shown in FIG. 2, excluding the front wheel side. DESCRIPTION OF SYMBOLS 1... Bogie frame, 2... Upper support part, 3... Lower support part, 4... Axle, 6... Main electric motor, γ... Upper suspension arm, 8... Lower support part Seat, 10.12... Mounting with bolts, 15... Reduction pawl device, 20, 24...
Insulating bottom plate, 21.25...Insulating seat plate, 22.26...
・Insulating tube Note that the same reference numerals ' in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] The bogie frame is provided with an upper support portion and a lower support portion, and the main motor is provided with an upper suspension arm and a lower support seat corresponding to these support portions, and the upper suspension arm is connected to the upper suspension arm through an insulating member. Connected to the above upper support part with mounting bolts,
A motor support device for an electric vehicle, characterized in that the lower support seat is connected to the lower support portion via an insulating member with a mounting bolt, and the main motor is insulated and supported.