JPH06179364A - Leg device of magnetic leviation vehicle - Google Patents

Abstract

PURPOSE:To operate an actuator in a short stroke and move up and down a wheel in a small storing space when the wheel is pulled up and stored and prevent a damage or a fire. CONSTITUTION:The shaft of a wheel 1 is held and suspended by a swing arm 4 journaled to a carriage side holding wall 3 by a bracket by providing a journal 2 the wheel 1 is journalled to the front end, and an elevating actuator 5, a lever joint 13 provided being journalled to the top of a triangle made by a bolt 10 for car height regulation being journalled to the carriage side holding wall 3 and an arm 11 is connected to the upper end, while the front end of a leaf spring 16 held by a journal 15 at the upper part of the carriage side is connected through a link 14. Consequently, an excellent shock absorbing capacity can be exercised so as to improve the riding amenity, and the car height can be adjusted.

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 supporting wheel of a magnetic levitation vehicle to move up and down, and positioning the supporting wheel by a swing arm and a lifting actuator. Then, through the bell crank at the upper end of the hoisting actuator, it is supported by a leaf spring in a substantially horizontal direction to support riding comfort, and the hoisting actuator with internal lock contracts to fully retract the supporting wheels for a short stroke. The present invention also relates to a magnetic levitation vehicle leg device, which is capable of providing a fire prevention wall and a foreign matter collision prevention wall at the lower portion of the leaf spring, and which enables vehicle height adjustment 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 leaks, the friction due to the seal increases when the piston operates, making it 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 designing and manufacturing. When the vehicle height is changed due to increase or decrease of passengers, a leg device that can easily cope with the change is required.

Further, in the low speed range, foreign matter on the roadbed collides with the leg device and damages the spring or the like to make it unusable, or in the unlikely event that flammable foreign matter collides with it, it is ignited by the heat of the brake device. In the case of fire, a leg device having a configuration capable of preventing fire and ensuring the function of the leg device has not been proposed.

An object of the present invention is to improve a leg device for supporting a supporting wheel of a magnetically levitated vehicle. The original function required for the supporting wheel is sufficiently exhibited to provide excellent riding comfort.
When the wheel is pulled up and stored, the actuator can operate with a short stroke and the wheel can be lifted and lowered in a narrow storage space.
Moreover, it is an object of the present invention to provide a magnetic levitation vehicle leg device having a configuration capable of adjusting the vehicle height, preventing damage, and preventing fire.

[0010]

According to the present invention, there is provided a swing arm having one end axially supported by a bogie in a horizontal direction and a wheel pivot support provided at the other end, a wheel pivot support or a swing arm pivot support, and a bogie above a wheel. It consists of a structure in which wheels are supported and suspended by a hoisting actuator arranged between them.The hoisting actuator consists of a hydraulic cylinder whose piston rod tip is connected to the shaft support and an internal lock is activated during extension. A lever joint, which is axially supported on the triangular vertex of the vehicle height adjustment bolt and arm, which is axially supported on the side support wall, is connected, and axially connected to the leaf spring end, which is disposed in a substantially horizontal direction. , A leg device for a magnetically levitated vehicle, characterized in that an input to a wheel can be transmitted to a shock absorber.

[0011]

In the leg device for a magnetically levitated vehicle according to the present invention, the supporting wheels are positioned and suspended by a swing arm horizontally supported on a dolly and a lifting actuator with an internal lock, and a lever join and a link are provided at the upper end of the lifting actuator. The horizontally arranged leaf springs are connected via a cushion to support the ride comfort, and the lift actuator with internal lock, which operates during extension, contracts after unlocking to fully retract the supporting wheels with a short stroke. Has been realized.

Further, the impact when the vehicle speed changes from high speed to low speed and the wheels are taken out is positioned by the hoisting actuator and then absorbed by the leaf spring via the bell crank, so that the conventional damper is used. There is no frictional force during operation like
The riding comfort is improved.

Since the lever joint connected to the upper end of the hoisting actuator is pivotally supported at the triangular vertex of the vehicle height adjusting bolt and the arm pivotally supported on the bogie side supporting wall,
The upper end position of the hoisting actuator buffered and supported by the leaf spring can be changed according to the vehicle height adjusting bolt length,
The height of the vehicle is adjusted by making the wheel height variable.

In the leg device of the present invention, since the leaf spring is horizontally arranged near the upper end of the hoisting actuator, a partition wall is provided between the upper end of the wheel and the leaf spring when the wheel is retracted.
Both the function of preventing collision of foreign matter and the function of fire protection can be provided.

[0015]

1 is an explanatory view showing the structure of a leg device for a magnetically levitated vehicle according to the present invention, as viewed from the side of the vehicle. In the leg device according to the present invention, a swing arm 4 that pivotally supports a wheel 1 is provided at the tip, and a swing arm 4 that is pivotally supported by a trolley-side support wall 3 via a bracket (not shown); One shaft of the wheel is supported and suspended by the lifting actuator 5 arranged between the carts above it.
A lever joint 13 axially arranged at a triangular apex portion 12 of a vehicle height adjusting bolt 10 and an arm 11 connected to a bogie side support wall 3 is connected to an upper end of the vehicle, that is, an end of the barrel 6. A tip end portion of a leaf spring 16 coaxially arranged at a shaft support portion 15 on the upper side is connected via a link 14.

Therefore, the leg device according to the present invention comprises the wheel 1
Is swingably positioned by a swing arm 4 and a hoisting actuator 5 with an internal lock, and is cushioned and supported by a leaf spring 16 horizontally arranged above the hoisting actuator 5. The hoisting actuator 5 is composed of a hydraulic cylinder with an internal lock, and a lock piston and a lock segment are attached to the tip end of the piston rod 7 that is fitted into the barrel 6, and the internal lock is activated when the piston rod 7 is fully extended. This is the configuration. Further, the piston rod 7 is protected by a metal bellows 8 and a partition wall 17 is provided on the entire surface below the leaf spring 16 arranged substantially horizontally except the lifting actuator 5.

The leg device of the present invention having the above structure is
First, by supplying pressure oil to the upper end side of the barrel 6 to extend the piston rod 7 of the hoisting actuator 5, the leg can be extended, and the inner lock is activated at the time of the maximum extension, so that FIG.
As shown in the figure, the footing is completed, and conversely, for storage, pressure oil is supplied to the axle side to release the internal lock and the piston rod 7
By contracting the wheel 1, the wheel 1 can be completely stored and the wheel 1 can be easily and reliably lifted and lowered. The storage lock is performed by an external hydraulic lock (not shown). In addition, the wheel 1 is positioned and suspended by the swing arm 4 and the tilted lift actuator 5, and is buffered and supported by the leaf spring 16 through the lever joint 13, so that the vehicle speed changes from high speed to low speed and the wheel is rotated. The flexible leaf spring 16 can absorb the impact when it is released, and it exhibits an excellent impact absorption capability to improve the riding comfort.

By adjusting the length of the vehicle height adjusting bolt 10 axially supported on the bogie side support wall 3, the fulcrum position of the lever joint 13 axially supported at the barrel 6 end of the hoisting actuator 5 is adjusted. Since it changes up and down, it is possible to adjust the vehicle height.

[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 tilting actuator which is tilted, and the wheel spring is lifted and lowered by the buffer spring. Since only the stroke of the lowering actuator is used, lifting and lowering is easy and reliable, the storage space can be made extremely small, and the excellent shock absorbing ability is exhibited to improve the riding comfort.

Further, in the leg device according to the present invention, the number of supporting points on the trolley side is small as shown in the embodiment, and the weight of the trolley as a whole can be reduced. 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 material thereof is a swing arm and a leaf spring made of titanium, and other materials. The weight of the entire leg device can be reduced by selecting an aluminum alloy or the like as the constituent member.

Since the leaf spring of the shock absorber is horizontally arranged above the wheel and the entire lower side of the leaf spring can be separated by the partition wall in the hangar of the leg device, the partition wall is provided with impact resistance and fire resistance, thereby making the tire Without causing damage or malfunction of the coil spring due to a fire or the like when a puncture piece or a foreign object splashes at the time of puncture,
The reliability of the entire device is improved.

Further, in the leg device according to the present invention, the lever joint connected to the upper end of the hoisting actuator is pivotally supported at the triangular vertex of the vehicle height adjusting bolt and the arm pivotally supported on the carrier side support wall. Therefore, the upper end position of the lifting / lowering actuator buffered and supported by the leaf spring can be changed according to the length of the vehicle height adjusting bolt, and the vehicle height 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. In particular, when the load on each leg device when the four leg devices are mounted on one bogie is different, it is necessary to make the bogie horizontal, but with the leg device of the present invention, such vehicle height adjustment is extremely difficult. It's easy.

[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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel 2 Shaft support 3 Vehicle side support wall 4 Swing arm 5 Lifting actuator 6 Barrel 7 Piston rod 8 Metal bellows 10 Vehicle height adjusting bolt 11 Arm 12 Triangle top 13 Lever joint 14 Link 15 Shaft support 16 Leaf spring 17 Bulkhead

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumio Iwamoto 1-10 Fuso-cho Amagasaki City, Hyogo Prefecture Sumitomo Precision Industries Ltd. (72) Shoji Iwai 1-10 Fuso-cho Amagasaki City Hyogo Prefecture Sumitomo Precision Co., Ltd. Within Kogyo Co., Ltd.

Claims (1)

[Claims] 1. A swing arm having one end axially supported by a bogie in a horizontal direction and a wheel pivot part provided at the other end, and a hoisting actuator arranged between the wheel pivot part or the swing arm pivot part and the bogie above the wheel. The lifting actuator consists of a hydraulic cylinder that connects the piston rod tip to the shaft support and the internal lock is activated when extended.The upper end of the lifting actuator is pivotally supported by the trolley-side support wall. A lever joint that is axially supported is connected to the triangular vertex of the vehicle height adjusting bolt and the arm, and is axially connected to a leaf spring end that is arranged in a substantially horizontal direction to buffer the input to the wheel. A leg device for a magnetically levitated vehicle, characterized in that it can be transmitted to