JPH0825448B2 - Magnetic levitation vehicle leg device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a leg device for supporting low-speed auxiliary wheels of a magnetically levitated vehicle, and one of the auxiliary wheels has a bell crank shape in which one is a leaf spring and the other is an arm. A suspension member is suspended by a leaf spring and a lever arm to be buffered and supported by a damper, and a lifting actuator with an internal lock is provided on the other arm of the suspension member to allow the auxiliary wheels to be retracted to improve the riding comfort. A leg device for a floating vehicle.

2. Description of the Related Art In a magnetically levitated vehicle system, a ground coil for levitation and propulsion is placed on the ground, magnetically repulsed by an electromagnet on the vehicle side to levitate, and the propulsion coils are excited one after another to generate a moving magnetic field. It is formed to move the electromagnet on the vehicle side, and the iron core can be eliminated by using the electromagnet as a superconducting coil.

However, when the superconducting coil is used, the repulsive magnetic levitation force is generated when the vehicle has a certain speed, so it is necessary to support the vehicle with auxiliary wheels in the low speed range.

Therefore, the auxiliary wheels of the magnetically levitated vehicle operate comfortably when stopped or in the required low speed range, are stored in the vehicle body when traveling at high speeds, can be used immediately when necessary, and can absorb the impact when the wheels are pulled out. Structure is required.

As an auxiliary wheel for a magnetically levitated vehicle, JP-A-63-212165 discloses that an auxiliary wheel is supported by a trailing arm,
A damper is provided on this arm to absorb the impact, and a lifting cylinder is provided on the fulcrum side of the damper.
Wheels can be stored by pulling up the damper and arm.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The above auxiliary wheel structure absorbs the impact when the wheel is taken out by the damper of the trailing arm, but this damper is mainly an oil-air type, and the piston is of oil or air type. Since a packing seal is used to prevent leakage, the friction due to the seal is great when the piston is operating, and the operation is astringent, so it is impossible to expect further improvement in riding comfort.

An object of the present invention is to improve a leg device that supports low-speed auxiliary wheels of a magnetic levitation vehicle. The legs of the magnetic levitation vehicle are configured to exhibit the original functions required for the auxiliary wheels and have a comfortable ride. The purpose is to provide the device.

Means for Solving the Problems The present invention relates to a lever arm that is pivotally supported on a vehicle by a pivot part and is connected to an axle part such as an axle or an axle bearing part, one of which is a leaf spring and the other of which is an arm. Connect the leaf spring tip of a bell crank-shaped suspension member coaxially supported by a pivot to the axle on the side opposite to the lever arm via a link arm, and attach a hoisting actuator with an internal lock to the arm tip of the suspension member. A leg device for a magnetically levitated vehicle, characterized in that the suspension member is fixed to the suspension member and the wheels can be lifted and lowered, and the tip of a piston rod of a damper having a cylinder portion pivotally attached to the vehicle is connected to the axle portion. .

In the magnetic levitation vehicle leg device according to the present invention, a bell crank-shaped suspension member, one of which is a leaf spring and the other of which is an arm, is pivotally supported on the vehicle by a pivot portion, and the lever arm is coaxially arranged to provide an axle at the tip of the lever arm. By connecting the parts, connecting the tip of the leaf spring on the opposite side to this via a link arm, and suspending and attaching a damper, the vehicle speed changes from high speed to low speed and the impact when the wheel is pulled out Since the leaf spring and the damper can be absorbed in this order, the frictional force at the time of operation of the damper can be reduced and the excellent shock absorbing ability can be exhibited to improve the riding comfort.

Also, since the lifting arm with internal lock is attached to the other arm of the bell crank-shaped suspension member, the wheel suspended at the tip of the leaf spring can be easily and reliably lifted,
Can be fixed.

Also, since the leaf spring is connected to the axle via a link, the twisting force due to the offset of the tire grounding point and the axial force during running are removed in the leg device, and the influence on the vehicle body side is minimized. .

EXAMPLE FIG. 1 and FIG. 2 are explanatory views showing the structure of a magnetic levitation vehicle leg device according to the present invention. FIG. 1 is an explanatory view seen from the side of the vehicle, and FIG. 2 is seen from the rear of the vehicle. FIG.

FIG. 3 is a vertical sectional view of the hoisting actuator, and FIG. 4 is a vertical sectional view of the damper.

The leg device according to the present invention comprises a bell crank-shaped suspension member (10) mounted on an axle (2), a lever arm (15), a lifting actuator (20) and a damper (30).

The bell crank-shaped suspension member (10) is pivotally attached to the leaf spring (11) and the hoisting arm (12) so as to interlock with each other only when the hoisting arm (12) swings. Axis part (13)
Are fixed to the vehicle via the bracket (4).

Further, a lever arm (15) is coaxially supported on the pivot (13), and a tip end of the arm (15) pivotally supports the axle (2) of the wheel (1). (3)
Connected with.

The tip of the leaf spring (11) has a link arm (14).
Is connected to the wheel shaft support (3) via the
Is suspended by a leaf spring (11) and a lever arm (15).

The hoisting actuator (20) is here hydraulically actuated, its cylinder (21) end is pivotally supported on the vehicle via a bracket (5) and the rod (22) is said hoisting arm (1).
2) It is pivotally supported at the tip.

The axle (2) is also suspended by the damper (30), and the tip of the rod (32) is attached to the wheel shaft support (3) by the cylinder (31).
The part is pivotally supported on the vehicle via a bracket (6).

In the leg device of the present invention configured as described above, first, the wheel (1) suspended at the tip of the leaf spring (11) operates the hoisting arm (12) by actuating the hoisting actuator (20). Through the pivot (13) as a fulcrum
Easy and reliable landing. In addition, the hoisting actuator (20), when the wheel (1) is lowered to a predetermined position,
The built-in internal lock operates to fix the lifting arm (12), and the axle (2) can be suspended at the tip of the leaf spring (11).

In addition, the suspension of the axle (2) by the leaf spring (11) and the lever arm (15) and the mounting of the damper (30) change the vehicle speed from high speed to low speed and the impact when the wheel is pulled out. Since the leaf spring (11) and the damper (30) can be absorbed in this order, the frictional force at the time of operation of the damper (30) can be reduced, and the excellent shock absorbing ability is exhibited to improve the riding comfort.

Further, the tip end of the leaf spring (11) and the wheel shaft support (3) are pivotally supported via the link arm (14), and the axle (2) is positioned, that is, the leaf spring (11) which is the support center and the load. Torsional force due to offset from the ground point of the wheel (1), which is the center, and axial force during traveling can be removed in the leg device, and the influence on the vehicle body side can be reduced.

Further, since the leaf spring (11) and the lever arm (15) are used mainly for the suspension of the leg device of the present invention, the weight of the entire device can be reduced by selecting the material thereof.

In the case where the conventional oil / air type shock absorber alone is used, if the sliding surface such as the piston rod of the damper is hit by foreign matter or the like and damaged, the shock absorbing performance may be immediately affected. Since the leaf spring (11) is used, the impact absorption performance is not affected even if foreign matter collides with it, and the reliability of the entire device is improved.

Further, the hoisting actuator (20) and the damper (30) used in the leg device of the present invention are provided with a piston rod as shown in FIG. 3 and FIG. 4 in order to protect the piston rod which is a functional part. Piston rods (22) (32) between the tip of (22) (32) and the ends of cylinders (21) (31)
The metal bellows (23) (33) that can seal between the operating ranges are installed to prevent deterioration due to wind and rain and damage to functional parts due to foreign matter, which were the drawbacks of conventional cloth boots. Therefore, the reliability of the leg device is increased.

EFFECTS OF THE INVENTION According to the present invention, a bell crank-shaped suspension member, one of which is a leaf spring and the other of which is an arm, is pivotally supported on a vehicle, and an axle is suspended using this leaf spring and a lever arm and a damper is mounted. This makes it possible to easily and reliably lift and fix the wheel that is suspended at the tip of the leaf spring by the hoisting actuator with an internal lock, and the use of the leaf spring makes it possible to reduce the frictional force during operation of the damper. The shock absorbing ability is demonstrated and the riding comfort is improved.

In addition, since the leaf springs are mainly used for suspension of the leg device, weight reduction is easy, and because metal bellows are used to protect the lifting actuator and the piston rod of the damper, deterioration due to wind and rain and damage to functional parts due to foreign matter are prevented. Therefore, there is an advantage that the operation reliability becomes high.

[Brief description of drawings]

1 and 2 are explanatory views showing the configuration of a magnetic levitation vehicle leg device 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 rear of the vehicle. is there. FIG. 3 is a vertical sectional view of the hoisting actuator, and FIG. 4 is a vertical sectional view of the damper. 1 ... Wheel, 2 ... Axle, 3 ... Wheel shaft support, 4, 5, 6 ... Bracket, 10 ... Bell crank suspension member, 11 ... Leaf spring, 12 ... Lifting arm, 13 ... … Axis, 14 …… Link arm, 15 …… Lever arm, 20 …… Lifting actuator, 21 …… Cylinder, 22 …… Piston rod, 23,33 …… Metal bellows, 30 …… Damper, 31 …… Cylinder, 32 ... Piston rod.

Claims (1)

[Claims] 1. A bell-crank suspension member in which a tip end of a lever arm pivotally supported on a vehicle by a pivot portion is connected to an axle portion, one of which is a leaf spring and the other is an arm and which is pivotally supported by the pivot portion coaxially with the lever arm. Of the leaf spring is connected to the axle part on the side opposite to the lever arm via a link arm, and a lifting actuator with an internal lock is connected to the arm end of the suspension member to fix the suspension member and lift the wheel. A leg device for a magnetic levitation vehicle, characterized in that a tip of a piston rod of a damper having a cylinder portion pivotally attached to a vehicle is connected to the axle portion.