JPS60189668A - Drive of truck for electric motor car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a bogie for an electric vehicle for a railway vehicle, and particularly to a drive device that can sufficiently function as a steering bogie.

[Background of the invention]

Most of the bogies for railway vehicles currently in use are basically H-shaped bogie frames consisting of a horizontal beam and a pair of side beams, and the wheelsets are independent in the longitudinal direction (travel direction) and the left-right direction (progressive direction). (direction perpendicular to the direction of travel). Note that this type of truck is called a non-steering truck.

On the other hand, a bogie whose wheelset can easily rotate around an axis perpendicular to the bogie frame is called a steering bogie and is known as a bogie that can easily pass through curves. Many proposals have been made, such as in US Pat. No. 1,179,723 and US Pat. No. 3,789,77.

However, all of these relate to accompanying carts that do not have a drive device, and for electric carts, conventionally known drive devices do not provide sufficient relative displacement between the wheelset and the bogie frame. Therefore, even if applied as is, a sufficient steering effect cannot be obtained.

Therefore, in order to make it possible to steer a bogie using an electric bogie, it is essential to have a drive device that can absorb the large relative displacement between the wheelset and the bogie frame, which is necessary for steering, without restricting it. In addition, the space that can be occupied by the drive device between the wheels is limited, and considering the steering movement, unless the drive device is made as small as possible, a vehicle with a large output capacity (such as a locomotive) will It will not be established.

The conventional link-type drive device is a drive device that can be configured in a relatively small space, but it cannot actively allow left-right movement of the wheel axle and bogie frame, and further improvements are needed in terms of space. The drawback is that it cannot be applied to vehicles with large capacity output unless it is taken care of.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of the prior art described above, to enable a large relative displacement between the wheel set and the bogie frame necessary for exerting the steering effect, and to prevent link buckling from occurring and to provide a sufficient amount of displacement. An object of the present invention is to provide a drive device for a steering truck that is capable of transmitting a strong driving force.

[Summary of the invention]

In order to achieve this object, the present invention provides an elastic bushing at the joint between the link and the bottle of the link type drive device, and sets the prying spring constant of the elastic bushing, the length of the link, and the force applied to the link. It is characterized by having a predetermined relationship between the two.

[Embodiments of the invention]

Hereinafter, regarding the drive device for an electric vehicle bogie according to the present invention,
This will be explained in detail with reference to the illustrated embodiment.

The drawings all show one embodiment of the present invention, and FIG. 1 shows a plan cross-sectional view of the drive device of the present invention, and FIG. 2 is a view taken from the 1-1 cross section of FIG. 1. . Also, Figure 3 is a cross-sectional view of Figure 2, and Figure 4 is a cross-sectional view of Figure 2.
It is a view seen from the ■-■ direction in the figure, and shows the state of the intermediate body and the link when the wheel set and the bogie frame are relatively displaced.

As shown in FIG. 1, in the drive device 1 of the present invention, an axle 3 on which a pair of wheels 2 and 2' are fitted passes through a hollow shaft 4, and is arranged on the outside of the hollow shaft 4. A bearing 6 is provided between the inner sides of the gear core 5, and a large gear 7 is attached to the gear core 5. A main motor 8 is attached to the hollow shaft 4, and a small gear lO is fitted to the other end of an armature shaft 9 of the main motor 8, and meshes with the large gear 7. Further, the gear box 11 includes a large gear 7, a small gear 10, and a bearing 6, and the weight of the gear box 11 is supported by the hollow shaft 4 and the main electric motor 8.

As shown in FIG. 2, the gear core 5 is provided with two bins 12 at symmetrical positions with respect to the axle 3, and the bins 12 are
The links 14 pass through the wheel 2 and protrude toward the shaft end, and are fitted with links 14 each having a rubber bush 13. On the other hand, two pins 15 protrude from the shaft end side of the wheel 2 at symmetrical positions with respect to the axle 3, and links 16 each having a rubber bush 13 are fitted into the pins 15 as well. The two links 14 provided on the gear core 5 and the two links 16 provided on the wheel 2 are connected to rubber bushings using an intermediate body 17 provided on the shaft end side of the wheel 2, as shown in FIG. 18 and a mounting pin 19.

As in this example, the intermediate body 17 and the links 14°16
By protruding from the shaft end side of the wheel 2, the space occupied by the drive device 1 between the wheels 2 and 2' can be reduced (this makes it possible to use a large-capacity traction motor 8, and further reduces the space required for steering, which will be described later). However, the rubber bushing 13. which is the most important component of the drive device 1 of this embodiment.
18 is located on the shaft end side (outside) of the wheel 2, which has the great effect of facilitating inspection and maintenance.

The drive device 1 configured as described above is a so-called truck-mounted drive device that is supported by a truck frame (not shown) using one end of the hollow shaft 4 and one end of the main motor 8. Relative movement between the axle 3 and the bogie frame in the vertical, horizontal, and longitudinal directions is controlled by four links 14.
,16. It will escape via intermediate body 17 and rubber bushing 13.18.

By the way, in the conventional design, the axle 3 is supported on the bogie frame in a relatively negative manner as a way to prevent the vehicle from passing through a curve, and when passing through a short curve (a sharp curve), the outside of the wheels 2, 2' is supported. There is a large amount of slip on the track side, which causes a large amount of wear on the wheels 2, 2', which is the biggest problem in extending the maintenance cycle for wheel tread grinding and replacement.

British patent 1 as a method to prevent wear on this car @2,2'
As shown in 179723, the axle 3 is placed against the bogie frame,
It is most effective to support the vehicle softly so that it can direct the warlord 13 in the radial direction of the curve when passing through a curve, thereby reducing the attack angle of the wheels 2.2 with respect to the rail.

Therefore, in a steering truck, the truck frame and the axle 3 must be able to make a relatively large displacement, and this movement can be handled without problems such as tooth contact between the large gear 7 and the small gear 10. It is indispensable to provide a drive device 1 with a low restraining force and a small restraining force for a cart that can be steered by an electric cart.

In this sense, the link-type drive 1 is able to achieve relatively large amounts of movement required for steering due to the use of relatively long links 14, 16 and soft rubber bushings 13.18. In the case of only two drive devices, the drive force from the bin 12 is the second one.
When the wheels 2 and 2' rotate in the direction of the arrow in the figure and rotate counterclockwise in Figure 2, a tensile force acts on the links 14 and 16, so the problem of buckling of the links 14 and 160 is solved. However, during reverse rotation driven clockwise, the link 14
Compressive forces occur at 16° and if the rubber bushings 13, 18 are made too soft, a buckling phenomenon occurs.

This limit condition is determined by rubber bushing 1.3 as shown in Figure 4.
．． If the prying spring constant of 18 is θ, the length of the link is P, and the force acting on link 14.16 is P, then link 14.1
In order for 6 not to buckle, Kθ・θ)P −L−θ, that is, Kθ〉P・L ・・・・・・・・・・・・・・・・・・(
Already given. Therefore, in this embodiment, the rubber bushes 13 and 18 are designed to be soft to the extent that no buckling phenomenon occurs according to the above formula (11), so that the restraining force on the steering wheel is small and the buckling problem during reverse rotation is avoided. A drive device for a steering truck that solves the problem can be obtained.

In the embodiment described below, the intermediate body 17 and the link 14.16 are provided on the shaft end side of the wheel 2. However, when the main motor 8 is small or the gauge is wide, It is also possible to construct the intermediate body 17 and the links 14, 16 in the wheels 2, 2', and in this case, of course, by forming the link structure in the relationship of Therefore, it is possible to obtain a drive device for a steering bogie that has a small binding force and solves the problem of buckling during reverse rotation.

〔Effect of the invention〕

As explained above, according to the present invention, sufficient relative displacement can be applied between the wheel set and the bogie without buckling the links of the link type drive device, which is a disadvantage of the prior art. With the exception of the present invention, it is possible to easily provide a driving device for an electric vehicle bogie that can exhibit a sufficient steering effect even when configured as a steering bogie.

[Brief explanation of drawings]

FIG. 1 is a partially sectional plan view showing an embodiment of the drive device for an electric vehicle bogie according to the present invention.
FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2, and FIG. 4 is a partially enlarged view taken along the line ■-■ in FIG. 2.2'...Wheel, 3...Axle, 4.
...Hollow shaft, 5 ...Gear core, 6 ...
・Bearing, 7...Large gear, 8...Main motor, 10...Pinion, 12.15...
・Pin, 13.18...Rubber bushing, 14,
16...Link, 17...Intermediate, 1
9...Mounting pin. Figure 1, 2nd ward, 1st floor

Claims (1)

[Claims] 1. The above-mentioned link type drive device uses a buffer mechanism consisting of a link and an intermediate body to transmit driving force between a gear device mounted on a truck and wheels. An elastic bush having a binding spring constant KO is provided at both end joints of the link, and when the length of the link is calculated and the force acting on this link is P, the stiff spring is adjusted so that KO) P −L holds true. A drive device for an electric vehicle trolley, characterized in that θ is determined as a constant. 2. The driving device for an electric vehicle bogie according to claim 1, wherein the gear device is disposed inside the wheel (IIN), and the link and the intermediate body are disposed outside the wheel. 3. An electric vehicle characterized in that the gear device, the link, and the intermediate body are all disposed at the till of the wheel. Driving device for trolleys.