JPH04372459A - Vibrationproof device - Google Patents

Abstract

PURPOSE:To obviate the need of a power unit and economize space under a car body by utilizing the reverse phase brake of a power generator, in a vibrationproof device installed between a carriage and a car body. CONSTITUTION:The rotor of a power generator 4 is connected at the top edge of a ball screw 3, and the ball screw 3 is constituted so as to be extended/ contracted for a cylinder 2 and to be rotatable in the normal/reverse directions by a screw installed on a guide member fitted with the opened port part of the cylinder 2. When the ball screw 3 is extended/contracted and revolved by the lateral oscillation of a car body 12, also a rotor 4 revolve at the same time. While, the vibration of the car body 12 is detected by a vibration sensor 15, and the voltage having the magnitude and direction for offsetting the revolution of the rotor 4 is outputted from a controller 16, and the revolution of the power generator 3 is suppressed. Accordingly, the vibration of the car body is suppressed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device used in trains, automobiles, etc., and more particularly to a vibration damping device that utilizes anti-phase braking of a generator.

0002

[Prior Art] For example, in a train vehicle, etc., a vibration damping device is installed between the chassis and the car body in order to absorb vibrations from the wheels. was used.

0003

[Problems to be Solved by the Invention] In recent vehicles, the space under the vehicle body tends to become narrower due to lowering the center of gravity. However, when hydraulic cylinders or pneumatic cylinders are used as described above, there is a problem in that the space under the vehicle body cannot be made as narrow as desired in order to secure space for the power unit that operates these cylinders.

The present invention has been made in view of the above problems, and its purpose is to provide a vibration damping device that does not require hydraulic pressure or pneumatic pressure and greatly contributes to saving space under the vehicle body. There is a particular thing.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration. That is, a cylinder having one end attached to either the chassis or the vehicle body of a vehicle, a guide member attached to the other end of the cylinder, and a cylinder having one end inserted into the cylinder by being screwed onto the guide member. a generator attached to either the chassis or the vehicle body of the vehicle, the other end of the ball screw being connected to a rotor; a sensor for detecting vibrations of the vehicle body; Accordingly, the generator was configured with a control device that controlled the generator in reverse phase.

[0006]

[Operation] With the above configuration, when the vehicle body is displaced relative to the chassis due to vibrations transmitted from the wheels, the ball screw expands and contracts while rotating, and the rotor of the generator connected to the tip of the ball screw is rotated to generate electricity. On the other hand, the values detected by the vibration sensor, such as the direction and magnitude of vibration of the vehicle body, are input to the control device and calculated, and electrical energy is generated in the direction and magnitude to offset the rotation of the generator rotor due to the rotation of the ball screw. is supplied to the generator. This suppresses rotation of the ball screw, suppresses relative movement between the ball screw and the cylinder, and suppresses displacement of the vehicle body with respect to the chassis.

[0007]

[Embodiment] Next, an embodiment of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a damper interposed between a chassis 11 equipped with wheels 10 and a vehicle body 12;
The damper 1 is roughly composed of a cylinder 2, a ball screw 3, and a generator 4. The cylinder 2 is formed into a cylindrical shape with a bottom, and a mounting member 5 is fixed to the outside of the bottom portion 2a. A reduced diameter portion 2b is formed in the opening of the cylinder 2, and the guide member 6 of the ball screw 3 is fitted into this reduced diameter portion 2b. A screw 6a corresponding to the ball screw 3 is provided on the inner surface of the guide member 6 so that the ball screw 3 can be screwed into the guide member 6.

A piston 7 is attached to one end of the ball screw 3 so as to be slidable within the cylinder 2. A generator 4 is connected to the other end of the ball screw 3 via a joint 8, and a rotor (not shown in the drawings) of the generator 4 is configured to rotate as the ball screw 3 rotates. . Furthermore, a mounting member 9 is fixed to the generator 4. Incidentally, in order for the piston 7 to function only as a support member during the movement of the ball screw 3, the two cavities in the cylinder 2 that sandwich the piston 7 are always communicated with each other.

The mounting member 5 fixed to the bottom 2a of the cylinder 2 is attached to a bracket 13 erected on the vehicle chassis 11, and the mounting member 9 provided on the generator 4 is attached to the vehicle body 12.
It is attached to a bracket 14 hanging vertically from the base. In this case, the damper 1 is arranged laterally with respect to the traveling direction of the vehicle body. Sensors 15 for detecting vibrations on the floor surface of the vehicle body are arranged at appropriate locations on the vehicle body 11, and the detected values of the sensors 15 are input to a control device 16 located at appropriate locations.

As shown in the block diagram of FIG. 3, this control device 16 is generally composed of a displacement direction, acceleration and speed calculation section 17, an applied voltage calculation section 18, an oscillation circuit 19, and a motor driver 20. . In addition, in the figure, the two sensors 14 are shown assuming that they are installed on the floor of the front chassis and the rear chassis, and there is no limitation on the number or position of the sensors. do not have.

Next, the operation of this configuration will be explained with reference to FIG. Vibrations of the wheels 10, for example, rolling vibrations, are transmitted to the vehicle body 12 via the suspension system (not shown), the chassis 11, the damper 1, and other shock absorbers (not shown), etc.
move in opposite directions. In response to these movements, the ball screw 3 performs expansion and contraction movements relative to the cylinder 2. At this time, the ball screw 3 is rotated by a screw 6a provided on a guide member 6 provided at the opening of the cylinder 2. That is, the ball screw 3 performs forward and reverse rotational motion at the same time as its expansion and contraction motion. As a result, the rotor of the generator 4 connected to the tip of the ball screw 3 via the joint 8 is rotated in the forward and reverse directions, and power is generated in the generator 4 in either direction of rotation. That is, the vibration energy of the chassis 11 is converted into electrical energy.

On the other hand, the displacement direction, velocity, or magnitude of acceleration of the vehicle body detected by the vibration sensor 15 installed at an appropriate location on the floor surface of the vehicle body 12 is input to the control device 16, and the control device 16 performs the following processing. The following processing is performed. That is, the detected value of the sensor 15 input to the control device 16 is
The calculation section 17 calculates the displacement direction, acceleration, and speed of the vehicle body 12, and the calculation section 18 calculates the applied voltage. Next, the calculated value signal is sent to the motor driver 20 via the oscillation circuit 19, and the signal is amplified. Based on this amplified signal, a voltage is applied to the generator 4 that applies a rotational force in the opposite direction to the rotating direction of the rotor of the generator 4, that is, a voltage that cancels out the electrical energy converted from the vibration energy. As a result, the rotational movement of the rotor and the ball screw 3 connected to the rotor is suppressed, and therefore the expansion and contraction movement of the bowl screw 3 is also suppressed. As a result, vibration of the vehicle body 12 can be suppressed.

[0014] In this embodiment, the cylinder is provided horizontally, but vibration damping in the vertical direction can also be achieved by providing the cylinder vertically.

[0015]

[Effects of the Invention] As is clear from the above explanation, the vibration damping device according to the present invention does not require a power unit such as a pneumatic or hydraulic power unit, so it is possible to save space under the vehicle body and reduce costs. be able to.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of the damper of the present invention.

FIG. 3 is a block diagram of a control circuit of the present invention.

[Explanation of symbols]

1 Damper 2 Cylinder 3 Ball screw 4 Generator 5 Mounting parts 6 Guide member 6a Thread groove 7 Piston 9 Mounting parts 10 Wheels 11 Chassis 12 Vehicle body 15 Vibration sensor 16 Control device

Claims (1)

[Claims] Claim 1: A cylinder having one end attached to either the chassis or the body of a vehicle, a guide member attached to the other end of the cylinder, and a cylinder screwed onto the guide member so that the one end side is inside the cylinder. a generator attached to either the chassis or the vehicle body of the vehicle, the other end of the ball screw being connected to a rotor, a sensor for detecting vibrations of the vehicle body, and the sensor A vibration damping device comprising: a control device that controls the generator in reverse phase according to the output of the generator.