JPS5929456B2 - Sliding device for linear motor propulsion vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding device for a track vehicle propelled by a linear motor in place of conventional wheel drives.

In conventional railway vehicles, the contact area between the wheels and the rails is small, resulting in large surface pressures, large noises due to rolling friction, and significant wear between the wheels and rails.

In addition, when the vehicle is running at high speed, the rotational speed of the wheels increases, making the conditions for use of the bearings that support the axle severe.

In order to reduce the load on the bearings, increasing the diameter of the wheels and lowering the rotation speed increases the weight of the vehicle, raising the center of gravity and making it unstable.

Furthermore, when the running speed exceeds the adhesion limit between the rail and the wheels, slippage occurs between the rails and the wheels, which significantly increases wear between the rails and the wheels.

Materials for the sliding shoes and guide tracks of track sliding vehicles that can provide stable running even at ultra-high speeds of 3,507 i/h or higher, exceeding the adhesive force, have already been disclosed in Japanese Patent Application No. 47-9989.
No. 3 (Japanese Patent Publication No. 49-57514, Publication No. 52-1488
6), etc.

However, it is very difficult to construct a flat guide track, and with ordinary sliding shoes, the roughness and waviness of the track surface cause large sliding frictional drag, making it difficult to achieve stable sliding.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sliding device for a linear motor-propelled vehicle that can provide stable sliding against roughness and undulations of a guide track surface and can suppress sliding frictional force to a low level.

For this reason, the configuration of the present invention supports horizontal shafts extending laterally in the front and rear parts of the vehicle, supports sliding blocks at both ends of the horizontal shafts, and provides hydraulic dampers on the sliding blocks.
The lower end of the piston rod of the hydraulic damper projects below the sliding block, and a sliding disk is supported on the lower end of the piston rod via a spherical bearing.

The present invention will be explained based on examples.

FIG. 1 shows an outline of a beam near motor-propelled vehicle.

A linear motor propulsion device 2 is provided at the center of the bottom surface of the vehicle body 1, and sliding devices 3 are provided at both ends of a horizontal shaft 4 extending in the transverse direction supported by the front and rear portions of the linear motor propulsion device 2.
are combined respectively.

As shown in FIG. 2, the sliding device 3 is supported on the underside of the vehicle body via a cushion material 7, and is configured to slide along two guide tracks 5 installed along both sides of the reaction rail 6 on the ground side. configured.

As shown in FIG. 3, the sliding device 3 includes a sliding block 9 equipped with a hydraulic damper represented by a cylinder 12, a bottom plate 18 that covers the lower surface of the sliding block 9, and a sliding disk held by the bottom plate 18. It consists of 15.

The sliding block 9 is elongated in the sliding direction of the vehicle, and has a large number of cylinders 12 that constitute a hydraulic damper arranged in parallel inside it. protrudes downward.

A pressurized liquid having lubricating properties, such as lubricating oil, is supplied to the upper chamber of the cylinder 12 from the vehicle body side through a passage 10.

The sliding block 9 is provided with a recess 20 in its central portion, and a projecting piece 8a of a bracket 8 fixed to the lower surface of the vehicle body 1 via a secondary cushioning material 7 is inserted into the recess 20. They are connected to each other by a shaft 4.

The bottom plate 18 is coupled to the lower surface of the sliding block 9, and has a cavity 21 therein.

The bottom plate 18 is provided with an opening 26 forming a partially spherical seat, and the sliding disk 15 is lightly supported inside the opening 26 so as not to fall off the bottom plate 18.

The sliding disk 15 has a partially spherical part in its upper half which engages with the opening 26.

The sliding disk 15 is supported on a vertical shaft 25 with a spherical bearing.

That is, a spherical seat 16 (see FIG. 4) is provided on the top surface of the sliding disk 15, and the spherical portion 14 formed at the lower end of the vertical shaft 25 is engaged with this.

FIG. 4 shows a front sectional view of a more specific sliding device of the present invention.

A throttle 36 having a small hole 37 is attached to the top end of the piston 13, and the lubricating oil under pressure in the upper chamber of the cylinder 12 passes through the small hole 37 and a passage 38 in the vertical shaft 25 to communicate with the sliding disk 15. It is designed to be supplied to spherical bearings.

A lining 34 made of a sliding bearing metal is provided on the spherical seat 16 with a thin cushion layer of rubber or synthetic resin interposed therebetween.

A passage 39 is further provided from this spherical seat 16 toward the lower surface of the sliding disk 15, and the guide track 5 and the sliding disk 1
Lubricating oil is supplied between the

The bottom plate 18 is actually divided into left and right parts, and the spherical seat 16 holds the upper half of the sliding disc 15.

The lower end of the bottom plate 18 is covered via a stopper 32 with a skirt 33 made of rubber or synthetic resin that is highly flexible and wear-resistant, completely preventing scattering of lubricating oil and sliding noise. .

A groove 40 is formed in the center of the guide track 5, and a flexible sliding plate 41 that covers the groove 40 and the horizontal guide track surface, or a cushioning material or maturo 3 is attached to the guide track body.
The two ends of the guide track are fixed to the guide track body with clasps 61.

A protrusion 35 provided at the center of the lower surface of the sliding disk 15 extends into the groove 40 to provide directional stability of the sliding device 3.

The end portion 4a of the horizontal shaft 4 is fitted into the hole 31 of the sliding block 9, and is supported so that the sliding block 9 can freely tilt back and forth as the sliding block 9 rises.

The guide track 5 is constructed by laying a cushioning material 67 such as rubber on the inner surface of a steel frame 68 having a U-shaped cross section, and fixing this with bolts 71.A steel plate 69 is placed above the cushioning material 67, and bolts 70 are placed on this. A pair of left and right blocks 64 are fixed with the handle, a concave groove 40 is formed in the center, a Matsutro 3 made of felt or non-woven fabric is adhered to the upper and inner surfaces of the blocks 64, and the surface of the Matsutro 3 is bonded. The block 64 has a structure in which the aforementioned sliding plate 41 is installed, and the block 64 is preferably molded using resin mortar or the like, and tunnels 65 and 66 for laying power supply lines, communication lines, etc. are integrally formed inside.

The sliding slope 41 is, for example, made by impregnating glass fiber with a polyimide resin that is rich in abrasion resistance and lubricity and molding it under heat and pressure. When the vehicle passes, the oil passes through the small hole and slides down the slope 41.
It oozes out onto the surface.

Next, the operation of the sliding device configured as described above will be explained.

As is clear from FIG. 2, the sliding device 3 is supported on the bottom surface of the vehicle body 1 via a cushioning material 7, and the vehicle body load is transmitted to the sliding block 9 via this cushioning material 7. It is transmitted to the vertical shaft 25 through a hydraulic damper consisting of a pressurized cylinder 12 and a piston 13 fitted therein, and is supported by the guide track 5 via the sliding disk 15.

A portion of the lubricating oil inside the cylinder 12 passes through the small hole 37 and the passage 38 to lubricate the spherical joint between the vertical shaft 25 and the sliding disc 15, and the lubricating oil further passes through the passage 39 to the guide track 5. Provides lubrication between the sliding disc 15 and the sliding disc 15.

Further, the lubricating oil splashed from the spherical seat 16 into the space 21 between the bottom plate 18 and the sliding block 9 lubricates the space between the opening 26 of the bottom plate 18 and the sliding disk 15.

While the vehicle is being propelled, the sliding disc 15 can freely tilt forward, backward, left and right on the spherical seat 16, and can overcome protrusions and undulations on the guide track surface without resistance.

The impact force acting on the sliding disc 15 due to the roughness and waviness of the guide track surface is absorbed and alleviated by the cushioning material provided in the spherical seat 16 and the free movement of the sliding disc 15.
Furthermore, the lubricating oil inside the cylinder 12 provides a buffer.

In particular, if there is a change in the roughness or waviness of the guide track surface in the width direction of the guide track 5, the sliding disk 15
Freely rotate horizontally at 6.

That is, for example, if a protrusion exists on the left side of the guide track 5, the sliding speed of the left half of the sliding disk 15 will be delayed and the sliding speed of the right half will be accelerated, and as a result, the sliding disk 15 will rotate to the left. .

The sliding disk 15 for such a protrusion on the guide track surface
The free horizontal rotational movement of the sliding disk 15 can alleviate the impact force received when the sliding disk 15 passes the protrusion, and can significantly reduce the drag force caused by sliding friction.

The sliding friction force that the sliding device 3 receives is supported by the central portion of the vehicle body via the sliding disk 15, the bottom plate 18, the sliding block 9, and the horizontal shaft 4.

On the other hand, the reaction force of the load that the sliding device 3 receives from the guide track 5 is absorbed by the sliding device 3 that is supported on the vehicle body side via the cushioning material 7.
When the vehicle runs around a curve, the protrusion 35 provided on the lower surface of the sliding disc 15 engages with the groove 40 of the guide track 5 to provide stability.

As described above, the present invention provides a hydraulic damper on a sliding block provided on the bottom surface of a vehicle body, and makes the lower end of the piston rod or vertical shaft that engages with this cylinder protrude below the sliding block, and uses a spherical bearing to create a sliding circle. Since it supports a plate, it is difficult to deal with roughness and waviness of the guide track surface.
The sliding disc freely rotates horizontally with respect to the vertical axis or swings back and forth and left and right, thereby preventing local abnormal sliding frictional drag from acting on the sliding disc and achieving smooth sliding. .

In addition, the sliding vibration of the sliding disc is buffered by the hydraulic damper and is not transmitted to the vehicle body, resulting in a very comfortable ride.
Moreover, the vehicle runs quietly.

The advantages of the sliding device for a linear motor-propelled vehicle according to the present invention are listed below.

(1) What is the sliding device and near motor propulsion device? Since the horizontal shaft 4 is fixed at the same position vertically relative to the vehicle body, it is possible to narrow the distance between the propulsion device and its counterpart, the reaction rail. It is possible (in reality, it is possible to approach up to about 2 mrrt).

This increases the efficiency of the linear motor propulsion device and allows the linear motor propulsion device to be made more compact.

(2) The accuracy of the guide track surface can be as rough and undulating as it can be practically processed, and the sliding disc can rotate freely with respect to such protrusions on the guide track surface or move forward, backward, left, and right. Since it can oscillate, abnormal local sliding pressure and temperature rise on the sliding surface can be suppressed, and sliding frictional resistance can be lowered.

(3) By adjusting the hydraulic pressure of each hydraulic damper provided in one sliding block, the vehicle body load borne by the sliding disk on the front side in the sliding direction is lightened, and the entire sliding device is brought into a state of floating forward. As a result, vibrations of the vehicle body due to changes in the surface of the guide track can be softened, and good sliding between the guide track and the sliding disc can be obtained.

,

[Brief explanation of the drawing]

FIG. 1 is a bottom view of a nearmorph propulsion vehicle equipped with a sliding device according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side sectional view of the sliding device, and FIG. 4 is a more detailed view of the sliding device. FIG. 1: Vehicle body, 2: Propulsion device, 3: Sliding device, 4: Horizontal axis,
5: Guide track, 6: Reaction rail, 7: Cushion material, 8 Niji bracket, 9: Sliding block, 12 Niji cylinder, 13: Piston, 14: Spherical part, 15: Sliding disc, 16: Spherical seat, 18: Bottom plate , 25: Vertical axis, 36: Aperture.

Claims (1)

[Claims] 1. Horizontal shafts extending laterally are supported in the front and rear parts of the vehicle, sliding blocks are supported at both ends of the horizontal shafts, a hydraulic damper is provided on the sliding blocks, and the lower end of the piston rod of the hydraulic damper is connected to the sliding block. protrude downward,
A sliding device for a linear motor-propelled vehicle, characterized in that a sliding disk is supported at the lower end of the piston rod via a spherical bearing.