JPH05131921A - Leg device for magnetic levitation vehicle - Google Patents

Abstract

PURPOSE:To provide a leg device for a magnetic levitation vehicle capable of freely elevating support wheels for low speed for a magnetic levitation vehicle having a good riding comforableness, with which an actuator can be actuated in a short stroke in pulling and storing whees, with which the wheels can be elevated in a small storage space, and with which vehicle height can be adjusted. CONSTITUTION:A swing arm 4 having a pivotal support part 2 for pivotally supporting a wheel 1 at a forward end which is pivotally supported to a carriage side support wall 3, an elevation actuator 5 disposed between the pivotal support part 2 and a carriage over it on the backside and having a coil spring 11, and a damper 16 freely capable of elongation and contraction disposed between the pivotal support part 2 and the carriage over it on the front side are provided to support and suspend a shaft of the wheel 1. A bulk head 8 as a head part of the elevation actuator 5 is pressed through a bell crank 12 by a vehicle height adjustment hydraulic cylinder 15, so its support height position can be changed as desired only by changing a pressing direction, thereby height adjustment can be performed very easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a supporting leg device (hereinafter referred to as a leg device) for allowing a low speed supporting wheel of a magnetically levitated vehicle to move up and down, and positioning the supporting wheel with a swing arm and a damper. Then, the hoisting actuator with a coil spring cushions and supports it to improve the riding comfort, and the hoisting actuator with internal lock contracts so that the supporting wheels can be fully retracted in a short stroke.
Further, the present invention relates to a leg device for a magnetically levitated vehicle capable of adjusting the vehicle height of the vehicle.

[0002]

2. Description of the Related Art A magnetic levitation vehicle system is one in which ground coils for levitation and propulsion are arranged on the ground, and the propulsion coils are excited one after another to form a moving magnetic field to move an electromagnet on the vehicle side. In addition, when the electromagnet on the vehicle side moves, an induced current is generated in the levitation coil on the ground, which causes magnetic repulsion to levitate the vehicle.

However, by using a superconducting coil,
Since the induced repulsive magnetic levitation force generates sufficient buoyancy to support the weight of the vehicle only when the vehicle has a certain speed, it is necessary to support the vehicle with supporting wheels in the low speed range.

Therefore, the support wheels of the magnetically levitated vehicle operate comfortably when stopped or in a required low speed range, are stored in the vehicle body during high-speed traveling, and can be used immediately when necessary and the impact when the wheels are taken out. There is a need for a structure that can absorb the.

As a supporting wheel for a magnetically levitated vehicle, Japanese Patent Laid-Open No.
Japanese Patent Laid-Open No. 3-212165 discloses a structure in which a supporting wheel is supported by a trailing arm, and a damper is provided on this arm to absorb impact. Further, a lifting cylinder is provided on a fulcrum side of the damper to pull up the damper and the arm. The wheels can be stored.

[0006]

In the structure of the supporting wheel described above, the shock when the wheel is pulled out is absorbed by the damper of the trailing arm. This damper is mainly an oil-air type, and the Since a packing seal is used to prevent air leakage, friction from the seal is large when the piston is operating, and the operation is uncomfortable, so it is impossible to expect further improvement in riding comfort.

Further, in a magnetically levitated vehicle, passengers get on and off when the vehicle is stopped, and the leg device of the supporting wheel is set so as to match the vehicle height with a predetermined platform height. For example, the vehicle weight is changed after design and manufacture. If there is a change in vehicle height due to an increase or decrease in passengers, etc., a leg device that can easily cope with this is required.

The present invention aims to improve a leg device for supporting low-speed support wheels of a magnetically levitated vehicle. The original functions required for the support wheels are sufficiently exhibited to provide excellent riding comfort, and the wheels are pulled up and stored. It is an object of the present invention to provide a magnetically levitated vehicle leg device having a structure in which an actuator can be operated with a short stroke at some times, wheels can be lifted and lowered in a narrow storage space, and the vehicle height can be adjusted.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a swing arm having one end pivotally supported on a bogie in a horizontal direction and a wheel pivotal support provided at the other end, and a shock absorber disposed between the pivotal support and the bogie above the wheels. The lifting actuator has a structure in which the wheel is supported and suspended by the shaft support part and a telescopic rod arranged between the bogie on the front side of the wheel. It consists of a hydraulic cylinder that operates a lock.The barrel head of the hydraulic cylinder is inserted into the bulkhead supported at one end of a bell crank pivotally supported by the carriage, and a coil spring is wound around the barrel outer circumference between the bulkhead and the barrel end. Further, a vehicle height adjusting hydraulic cylinder pivotally supported on the bogie is provided at the other end of the bell crank so that the bulkhead supporting height position can be changed when the leg is extended. A leg system for magnetic levitation vehicle according to claim.

[0010]

In the magnetic levitation vehicle leg device according to the present invention, positioning is performed by a rod formed of a telescopic hydraulic cylinder arranged between a swing arm in which a supporting wheel is horizontally supported by a dolly and a dolly in front of the wheel. The suspension actuator is suspended and supported by a lift actuator with a coil spring to improve riding comfort.The lift actuator with an internal lock, which operates during extension, contracts after unlocking the support wheels in a short stroke. Has been realized.

Further, the coil spring mounted on the hoisting actuator arranged between the shaft support and the bogie above the wheel can absorb the shock when the vehicle speed is changed from high speed to low speed and the wheel is taken out. There is no frictional force when operating like a damper, and the shock absorbing ability when stepping on the leg is excellent and the riding comfort is improved.

In the present invention, the structure adopted for adjusting the vehicle height is such that the bulkhead having the barrel head of the hydraulic cylinder inserted therein is pivotally supported at one end of the bell crank and the other end is pressed by the hydraulic cylinder. Therefore, the supporting height position can be arbitrarily changed by changing the pressing direction,
Adjusting the vehicle height is extremely easy.

[0013]

1 and 2 are explanatory views showing the structure of a leg device for a magnetically levitated vehicle according to the present invention. FIG. 1 is an explanatory view seen from the side of the vehicle, and FIG. 2 is an explanatory view seen from the front of the vehicle. is there. The leg device according to the present invention is provided with a pivotal support portion 2 for pivotally supporting the wheel 1 at the tip thereof, and a bracket (not shown) on the bogie side support wall 3.
A swing arm 4 supported via a shaft, a hoisting actuator 5 which is arranged between the shaft support 2 and a truck located above and behind it and around which a coil spring 11 is wound, and a swing arm 4 which is located between the axis support 2 and a truck located above and above it. The wheel 1 shaft is supported and suspended by the expandable and contractible damper 16, that is, the wheel 1 is positioned and suspended by the swing arm 4 and the damper 16, and the coil spring 1
The lifting and lowering actuator 5 having the structure 1 buffers and supports it.

Here, the damper 16 is composed of a hydraulic cylinder. Further, the lifting actuator 5 is composed of a hydraulic cylinder with an internal lock, and a lock piston and a lock segment are attached to a fitting tip end portion of a piston rod 7 which is fitted into the barrel 6, and the internal lock is activated when the piston rod 7 is fully extended. It is a configuration that does. In addition, barrel 6
Is fitted in a bulkhead 8 connected to a short lever 13 of a bell crank 12 pivotally supported by a trolley-side support wall 3, and a spring seat 9 provided at the lower end of the bulkhead 8 and a spring seat 10 provided at the end of the barrel 6 are inserted. A coil spring 11 is wound around the outer circumference of the barrel 6.

The bell crank 12 is rotatably supported on the trolley-side support wall 3, the bulkhead 8 is connected to the short lever 13, and the long lever 14 is rotatably supported on the trolley-side support wall 3 via a bracket (not shown). The piston rod of the hydraulic cylinder 15 for adjusting the vehicle height is connected.

The leg device of the present invention having the above structure is
First, pressure oil is supplied to the bulkhead 8 side to extend the piston rod 7 of the hoisting actuator 5, so that the leg can be extended. At the maximum extension, the internal lock operates and the leg moves as shown in FIG. The delivery is completed, and conversely, the wheel is completely housed and the wheel 1 can be easily lifted up and down by supplying pressure oil to the spring seat 10 side to release the internal lock and contract the piston rod 7. And surely. The storage lock is performed by an external hydraulic lock (not shown).

Further, since the bulkhead 8 which is the head of the hoisting actuator 5 is pressed by the vehicle height adjusting hydraulic cylinder 15 via the bell crank 12, the supporting height position thereof can be changed only by changing the pressing direction. Can be changed arbitrarily, and vehicle height adjustment is extremely easy.

Further, the wheel 1 is positioned and suspended by the swing arm 4 and the inclined damper 16 and buffered by the hoisting actuator 5 which is inclined rearward, whereby the vehicle speed changes from high speed to low speed. The coil spring 11 of the hoisting actuator 5 can absorb the shock when the vehicle lifts, and the damper 16 composed of a hydraulic cylinder can absorb minute vibrations and the like, exhibiting excellent shock absorbing ability and improving the riding comfort.

[0019]

As shown in the embodiments, the leg device according to the present invention has a structure in which the wheel is positioned and suspended by the swing arm and the slanted rod, and the hoisting actuator slanted backward buffers and supports the wheel. Since only the stroke of the hoisting actuator is used for hoisting and hoisting, hoisting and hoisting is easy and reliable, the storage space can be made extremely small, and the excellent shock absorbing ability is exhibited to improve riding comfort.

Further, in the leg device according to the present invention, the bogie side supporting portion is concentrated on one wall surface behind the wheel as shown in the embodiment, and the bogie side reinforcing portion is provided on one side. And weight reduction is possible. Further, since the suspension main body of the leg device of the present invention is only the swing arm and the hydraulic cylinder, in consideration of use in a strong magnetic field and weight reduction,
For example, the weight of the entire leg device can be reduced by selecting titanium for the swing arm and aluminum alloy for the other constituent members.

Since the coil spring of the shock absorber is arranged above the wheel, the reliability of the entire device is improved without causing damage or malfunction of the coil spring due to splashes of debris or foreign matter at the time of tire puncture.

In the leg device according to the present invention, the bulkhead of the hoisting actuator is pressed and supported by the hydraulic cylinder via the bell crank, and the height of the vehicle can be adjusted. Even if there is such a change, the height of the vehicle can be adjusted to the optimum height, which does not hinder passengers from getting on and off.

[Brief description of drawings]

FIG. 1 is an explanatory view of the configuration of a leg device for a magnetically levitated vehicle according to the present invention, as seen from a vehicle side surface.

FIG. 2 is an explanatory view of the configuration of a leg device for a magnetically levitated vehicle according to the present invention as seen from the front of the vehicle.

[Explanation of symbols]

 1 Wheel 2 Shaft Support 3 Vehicle Side Support Wall 4 Swing Arm 5 Lifting Actuator 6 Barrel 7 Piston Rod 8 Bulkhead 9 Spring Seat 10 Spring Seat 11 Coil Spring 12 Bell Crank 13 Short Lever 14 Long Lever 15 Hydraulic Cylinder for Adjusting Vehicle Height 16 damper

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[Procedure amendment]

[Submission date] August 2, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Paragraph number "0009"

[Correction method] Change

[Correction content]

[0009]

SUMMARY OF THE INVENTION According to the present invention, a swing arm having one end pivotally supported on a bogie in a horizontal direction and a wheel pivotal support provided at the other end, and a shock absorber disposed between the pivotal support and the bogie above the wheels. The lifting actuator has a structure in which a wheel is supported and suspended by a shaft support part and a telescopic damper arranged between the bogie on the front side of the wheel. It consists of a hydraulic cylinder that operates a lock.The barrel head of the hydraulic cylinder is inserted into the bulkhead supported at one end of a bell crank pivotally supported by the carriage, and a coil spring is wound around the barrel outer circumference between the bulkhead and the barrel end. Further, a vehicle height adjusting hydraulic cylinder axially supported by a bogie is provided at the other end of the bell crank to make the bulkhead supporting height position variable when the leg is extended. Preparative a leg device for magnetic levitation vehicle according to claim.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] Paragraph number "0010"

[Correction method] Change

[Correction content]

[0010]

In the leg device for a magnetically levitated vehicle according to the present invention, positioning is performed by a damper composed of a telescopic hydraulic cylinder arranged between a swing arm in which supporting wheels are horizontally supported by a truck and a truck in front of the wheels. The suspension actuator is suspended and supported by a lift actuator with a coil spring to improve riding comfort.The lift actuator with an internal lock, which operates during extension, contracts after unlocking the support wheels in a short stroke. Has been realized.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Paragraph number "0019"

[Correction method] Change

[Correction content]

[0019]

As shown in the embodiment, the leg device according to the present invention has a structure in which the wheel is positioned and suspended by the swing arm and the inclined damper , and the wheel is lifted by the lifting actuator tilted backward. Since only the stroke of the hoisting actuator is used for hoisting and hoisting, hoisting and hoisting is easy and reliable, the storage space can be made extremely small, and the excellent shock absorbing ability is exhibited to improve riding comfort.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumio Iwamoto 1-10 Fuso-cho, Amagasaki-shi, Hyogo Sumitomo Precision Industries, Ltd.

Claims (1)

[Claims] 1. A swing arm having one end axially supported by a bogie in a horizontal direction and a wheel shaft support provided at the other end, a hoisting actuator having a shock absorber arranged between the shaft support and the bogie above the wheel, and a shaft. It consists of a structure in which the wheel is supported and suspended by the fulcrum and a telescopic damper arranged between the bogie on the front of the wheel, and the hoisting actuator consists of a hydraulic cylinder with the piston rod tip connected to the fulcrum and the internal lock activated when extended. , A barrel head of a hydraulic cylinder is inserted into a bulkhead supported at one end of a bell crank pivotally supported by a carriage, and a coil spring is wound around the barrel outer circumference between the bulkhead and the barrel end, and the other end of the bell crank is further provided. A magnetically levitated vehicle characterized in that a vehicle height adjustment hydraulic cylinder pivotally supported on a bogie is provided on the bogie to make the height position of the bulkhead support variable when the leg is extended. Leg device.