JPS5844505B2 - Sliding device for linear motor propulsion vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to a sliding device for a vehicle propelled by a linear motor.

The traveling speed of conventional wheel-supported railway vehicles is limited to the limit of the adhesion force between the wheels and the track, and linear motor propulsion vehicles have been proposed as railway vehicles that can travel beyond this limit.

Superconducting magnetic levitation has been proposed for linear motor-propelled vehicles, but this is still in the development stage and it will take a considerable amount of time to put it into practical use due to its enormous equipment costs.

Of course, magnetic levitation vehicles do not require conventional wheels,
This is advantageous in that the center of gravity of the vehicle can be lowered, but on the other hand, it requires a means to stably support the vehicle during low-speed driving and to safely support the vehicle in the event of a magnetic levitation failure accident.

For this purpose, for example, Japanese Patent Application Laid-Open No. 49-57514 (Japanese Patent Application No. 49-57514)
7-99893) By selecting an appropriate sliding material as shown in the publication, it is possible to keep the vehicle on the track not only in emergencies, but also in ordinary low-speed to high-speed ranges without using magnetic levitation means. The possibility of safely gliding support along has already been proposed.

Further, the present inventor has proposed that using the sliding material, the sliding shoe is supported by a horizontal pin in a direction transverse to the vehicle, and the front end side of the sliding shoe receives a force that tends to rise from the track surface by a spring means. We have proposed a vehicle sliding device that provides good viscous lubrication between the vehicle and the raceway.

However, in the above-mentioned sliding device, if the flatness of the track sliding surface is not good, areas with high local sliding pressure with the sliding shoes will occur on the protrusions (albeit slight) on the raceway surface, resulting in sliding friction drag. Not only does this increase, but also the wear and tear on the raceway and sliding shoes increases significantly.

Requiring a dog track with a highly flat surface and strong enough to withstand sliding friction under abnormal local sliding pressures increases manufacturing costs and increases the weight of the track.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding device for a vehicle that can suppress frictional drag to a low level on raceway surfaces that are not very flat and are manufactured using ordinary manufacturing methods.

The sliding device of the present invention is equipped with a sliding disc for slidingly supporting a vehicle under viscous lubrication using the above-mentioned sliding material, and the flatness of the raceway surface is not very accurate. The sliding disk is also constructed so that it rotates on the sliding surface and performs smooth sliding motion.

By using the sliding device of the present invention, it is possible to achieve sufficiently low sliding friction for a track that can be installed at a relatively low cost, such as laying a patented material featuring the sliding material proposed in the above-mentioned application on a concrete foundation material. It is possible to support the vehicle by smoothly sliding it under the ground.

Hereinafter, the structure of the present invention will be explained based on the illustrated embodiment. At least four sliding devices are provided on the front, rear, left and right sides of the vehicle body, one of which is shown in FIG.

That is, the sliding device includes a planar support frame 1 supported on the bottom of the vehicle, a bottom plate 3 that closes the bottom of the support frame 1, and a number of sliding disks held in the spherical opening of the bottom plate 3. 4 and
It consists of a vertical shaft 9 that engages with a spherical recess provided on the top surface of the sliding disc 4 to support the vehicle body load, and a bearing plate 2 that fixedly supports the vertical shaft 9.

The bearing plate 2 is accommodated in a recessed portion of the bottom plate 3 so as to be slidable in the vertical direction, and is supported by the inner top wall portion of the support frame 1 via a large number of elastic blocks 8 .

Elastic blocks 5 for repelling obstacles on the track are supported at the front and rear parts of the bottom plate 3, respectively.
, the bottom plate 3 and the support frame 1 are firmly connected to the top plate 6 by bolts (not shown).

On the other hand, a bracket 7 is fixed to the lower surface of the vehicle body, and this bracket 7 straddles the −L surface of the top plate 6 via an elastic plate 13 having an inverted U-shaped cross section, and connects both side walls of the sliding device. It is held and connected to the support frame 1 via a pair of left and right connecting shafts 10.

FIG. 2 shows a more specific embodiment of the sliding device according to the present invention.

A bottom plate 3 is fixed to the lower end surface of the support frame 1, and a cover 5 has a recess that engages with a protrusion 23 provided on the peripheral edge of the bottom plate 3.
is attached so as to cover the outer peripheral edges of the support frame 1 and the bottom plate 3.

The lower end of this cover 5 is further surrounded by an annular skirt 24 made of a material that is highly elastic, has a small coefficient of friction, and is highly wear resistant, to prevent the lubricating oil supplied to the sliding disk 4 from scattering. It is supposed to be done.

The bottom plate 3 is an opening that forms a partially spherical seat with a large opening upwards.
20, into which a spherical peripheral wall portion formed integrally with the upper part of the sliding disk 4 is engaged.

In reality, the bottom plate 3 is divided into left and right parts, and holds the sliding disc 4 so that it does not fall off.

The sliding disk 4 also has a hemispherical recess 19 on its upper surface. Preferably, a thin rubber cushion is bonded to the recess 19, and the surface thereof is coated with impact-resistant or resistant material such as titanium or titanium-molybdenum alloy. By providing the lining made of a highly abrasive material, it is possible to reduce the dynamic load that the sliding disk 4 receives and reduce the sliding frictional force.

The friction surface in contact with the orbit of the sliding disk is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 49575.
In addition to the sliding material disclosed in Japanese Patent No. 14, it is coated with high manganese steel, titanium nitride or a titanium alloy.

A spherical projection 9a provided at the lower end of the vertical shaft 9 described above is engaged with this recess 19.

A flange 25 is formed integrally with the vertical shaft 9 adjacent to the spherical protrusion 9a, and is fitted and supported by the lower step of the through hole 26 provided in the bearing plate 2.

In reality, the vertical shaft 9 is lined with a lower half portion inserted into the through hole 26 and a material having elasticity and low friction properties such as rubber of the support frame 1 or rubber containing tetrafluoroethylene resin. The upper half portion is supported vertically and slidably within the through hole 14, and these are connected to each other at a threaded portion 15.

A longitudinal passage 16 is provided in the vertical axis 9 and the sliding disk 4
Lubricating oil is supplied to the loosely coupled portion between the sliding disc 4 and the raceway surface 30 through a throttle passage 18 provided in the sliding disc 4.

Therefore, the lower end portion of the throttle passage 18 is connected to a cavity 17 formed by cutting out the bottom surface of the sliding disk 4.

In this embodiment, the bearing plate 2 supports two vertical shafts 9, and its planar shape is approximately oval as shown in FIG. It is supported in an elliptical opening 21 covered by 21 so as to be slidable in the vertical direction.

A gap 29 is usually provided between the bearing plate 2 and the bottom plate 3.

There are mutually opposing recesses 11 between the bearing plate 2 and the support frame 1,
12, and an elastic block 8 made of rubber or the like is provided thereon.
is accommodated.

In the embodiment shown in FIG. 2, a groove 31 is provided in the center of the support frame 1, and the leg 32 of the bracket 7 is loosely inserted into this groove 31, and the connecting shaft 10 extending in the horizontal and lateral direction is inserted into the groove 31. The two are combined.

This connecting shaft is disposed close to the raceway surface 30, suppresses flapping of the sliding shoe, and reduces frictional vibration and frictional drag.

Next, to explain the operation of the vehicle sliding device configured as described above, the support frame 1 supported on the vehicle side
On the other hand, the bearing plate 2 supporting the vertical shaft 9 is supported via an elastic block 8, and the lower end of the vertical shaft 9 is spherically connected to the sliding disc 4 to transmit the vehicle body load to the track surface 30. It is something to do.

The lubricating oil supplied under pressure from the vehicle side through the passage 16 lubricates the spherical joint between the vertical shaft 9 and the sliding disk 4, and a part of it is supplied onto the sliding surface 30 of the track through the throttle passage 18. Ru.

Further, the remaining oil enters the gap 29 from the spherical joint and further into the opening 20 of the bottom plate 3 to lubricate the supporting portion of the sliding disk 4 and scatter onto the raceway surface 30.

The track surface 30 that the sliding disk 4 engages with is the skirt 24.
to prevent oil from splashing to the outside of the sliding device.

As the vehicle is propelled, the sliding disc 4 slides along the track surface 30, but when there are irregularities on the track surface 30, when the sliding disc hits such a convex part on the sliding surface. , can freely rotate in the spherical joint part, reduce the impact with the convex part, and maintain smooth sliding movement.

The sliding disk 4 is only held at the opening 20 of the bottom plate 3 so as not to fall off the bottom plate 3, and the impact received by the sliding disk 4 is caused by the lower spherical projection 9 of the vertical shaft 9.
In a, this part is supported under lubricating oil that is supplied under pressure.

In particular, when there is an uneven portion in the width direction of the raceway surface 30, when the sliding disk approaches a convex portion that is offset from the center line in the sliding direction, the relative sliding speed on the side where the convex portion is located is reduced, The sliding speed on the opposite side will be increased.

The rotational movement of the sliding disk 4 due to such force not only relieves the impact force received by the sliding disk 4 from the unevenness of the raceway surface, but also reduces the impact force that is supplied into the cavity 17 by the rotating centrifugal force of the sliding disk 4. The oil is scattered in the circumferential direction, and the raceway surface 30 and the disc 4 are
This has the effect of ensuring more reliable lubrication.

The vertical impact from the sliding disk 4 applied to the vertical shaft 9 is transmitted to the bearing plate 2, further damped by the elastic block 8, and is not transmitted to the support frame 1.

In the third embodiment shown in FIG. 4, a vertical shaft 36 is integrally provided on the top surface of the sliding disk 4, and an annular groove 3 is provided around the vertical shaft 36.
8, an elastic rubber ring 35 is fitted therein, a sliding bearing metal ring 39 is fitted therein, and the shaft 36 is inserted into a hole 37 provided on the lower surface of the bearing plate 2 into which a bearing metal sleeve 40 is fitted. That is.

The reaction force received by the sliding disk 4 from the raceway surface 30 is transmitted to the bearing plate 2 via the elastic rubber ring 35.

Note that, as in the previous embodiment, the sliding disk 4 is held by the support frame 1 so as not to fall off.

In the embodiment described above, the bearing plate 2 and the sliding disc 4 are connected via an elastic rubber seat instead of a spherical seat, and the operation is similar to that of the embodiment described above.

As described above, as a sliding device for a beam near motor-propelled vehicle according to the present invention, a bearing plate is supported on a support frame via an elastic member, and the lower spherical projection of the column member supported by the bearing plate is attached to the upper surface of the sliding disk. In addition to engaging the formed spherical recess, the sliding disk is lightly supported by the spherical opening provided in the bottom plate of the support frame, so that the sliding disk or The planar rotation of the sliding shoe reduces the impact received by the sliding shoe, prevents the track surface from being scratched and damaged, and at the same time significantly reduces the frictional force exerted on the sliding vehicle.

Furthermore, the oil that has lubricated the spherical joint support portion of the sliding shoe is scattered onto the raceway surface by the rotational centrifugal force of the sliding disk, thereby lubricating the entire raceway surface.

To summarize, the sliding device of the present invention has the following advantages.

(1) Friction does not fluctuate even if the track is inefficient, and the coefficient of sliding friction is low, making it possible to keep friction temperature low.

(2) Since the sliding disk can rotate freely against the lack of raceway surface, local contact pressure is prevented from increasing, and uneven wear occurs even if the hardness of the raceway surface material is not too high. do not have.

(3) For the same reason, the sliding disk itself does not need to be particularly hard.

(4) Since the sliding disk has a simple shape, it is easy to process.

(5) Since the sliding direction of the sliding disc is free, there is no problem when the vehicle runs around corners or at branch points.

(6) Since the sliding disk and the support column supporting it are spherically connected, and lubricating oil is supplied under pressure to the connected portion, it is strong against impact forces.

(7) If sheet-shaped track material is installed on the concrete track surface, it will be possible to smoothly pass through the joints of the track, and the high noise and vibrations that occur when wheels pass through the joints of the track can be reduced. It can be resolved.

(8) Since the center of gravity is lower than that of conventional wheel-driven vehicles, a high-speed vehicle with a stable, quiet, and comfortable ride without side vibration can be realized.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing an outline of a sliding device for a linear morph propulsion vehicle according to the present invention, FIG. 2 is an enlarged vertical sectional view showing the lower part of the sliding device with different support parts for the vehicle body, and FIG.
This figure is a plan view of the same, and FIG. 4 is a cross-sectional view of a sliding device according to a third embodiment of the present invention. 1: Support frame, 2: Bearing plate, 3: Bottom plate, 4: Sliding disc, 6
: Top plate, 7: Bracket, 8: Elastic block, 9: Vertical shaft, 10: Connection shaft, 16: Passage, 18: Restriction passage, 19
: Spherical recess, 20: Opening, 30: Raceway surface.

Claims (1)

[Claims] 1. A planar support frame supported on the lower surface of the vehicle body, a shaft support member supported inside the support frame via an elastic member, and a plurality of vertical supports fixedly supported on the shaft support member at intervals in the longitudinal direction. A linear motor comprising a shaft member and a sliding disc held in a spherical opening at the bottom of the support frame, the sliding disc being horizontally rotatably and swingably engaged with the lower end of the vertical shaft member. Sliding device for propulsion vehicles.