JP2715968B2 - Railcar bogie - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie for a railway vehicle.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional bogie for a railway vehicle moves left and right between a center pin 6 and a bogie frame 8 in order to suppress relative movement of a bolsterless bogie and a vehicle body in a sleeper direction (axle direction). A damper 9 is provided, and a yaw damper 10 is provided between an outer surface of the bogie-side burr 7 and a side surface 11 of the vehicle body structure in order to suppress rotational movement between the bogie and the vehicle body. In addition, 11 indicates a vehicle body side, 12 indicates wheels, and 13 indicates an axle.

[0003]

The above prior arts have not been sufficiently considered in railway vehicles running at high speed, particularly in terms of wind noise from around bogies and high frequency vibrations transmitted through damping devices. That is, since the yaw damper in the bolsterless bogie having the left-right moving damper and the yaw damper was mounted so as to protrude to the side burr side of the bogie,
Wind noise was generated during high-speed running, which was one of the causes of noise around the bogie. It is effective to attach a cover on the side of the bogie to reduce wind noise during high-speed running.However, in the form of a railway car, there is little margin in the width due to the vehicle limit with respect to the length in the track direction. It was difficult to attach the cover.

[0004] Also, high-frequency noise transmitted through the yaw damper has entered the interior of the vehicle, which has contributed to the interior noise. In conventional shock absorbers using yaw dampers, vibrations exceeding the frequency that can appropriately control the bogie are transmitted to the vehicle body side,
There has been a problem that bogie noise enters the room.

An object of the present invention is to provide a bogie for a railway vehicle which can reduce wind noise from around the bogie and vibration transmitted through the damping device in a railway vehicle running at high speed.

[0006]

SUMMARY OF THE INVENTION The above object is achieved by a pair of axles.
A bogie frame supported by the pair of axles;
The relative rotational movement of the bogie frame and
And the center pin that connects the bogie and
And the bogie frame and the vehicle
A pair of fluid dampers for damping vibrations in a plane,
The bogie for a railway vehicle, comprising:
The devices are installed at both ends of the bogie frame in the running direction.
And each fluid shock absorber is point symmetric with respect to the center pin of the bogie frame.
And with respect to the axle
Are arranged substantially parallel to each other,
The end is connected to the end of each side of the bogie frame, and each fluid
The other end of the shock absorber is connected to the vehicle body, each of side beams
Bogie frame near the position where each of the above-mentioned fluid dampers is installed
A pair of vibration detectors that detect the vibration of
In-phase and out-of-phase of each vibration detection result of the pair of vibration detectors
Determine the phase and rotate the bogie to the fluid shock absorber and left
There is a controller that outputs a control command to suppress
Ri, control from the controller the damping force of the fluid damping device
Achieved by providing a valve device controlled by commands
Is done.

[0007]

[Effect] Both ends of the bogie frame in the running direction are substantially flat to the axle.
By placing fluid shock absorbers on the line,
There is no longer a protruding member equivalent to a conventional yaw damper.
Aerodynamic measures, such as attaching a cover
It becomes. This reduces the level of wind noise.
Can be. In addition, the results of the vibration detector
To determine the in-phase and out-of-phase, and determine the damping force of the fluid shock absorber.
Controller to suppress the lateral movement and rotational movement of the truck
Controlled by. With this control, only the rotational movement of the bogie
Not the right and left movement with a pair of fluid shock absorbers
Can be. Therefore, with proper control of bogie movement and bogie
Prevents high-frequency vibrations from entering the car
You.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a plan view of a high-speed bogie for a railway vehicle according to the present invention. Reference numeral 1 denotes a fluid damper for attenuating vibration between the bogie side and the vehicle body side, and is provided at the end 7 of the side burr. Reference numeral 2 denotes a valve device for controlling the damping coefficient of the fluid damper 1, reference numeral 3 denotes a control device for driving the valve device 2, and reference numeral 4 denotes a sensor as a vibration detector for reading the vibration transmitted to the fluid damper 1. It is provided on each of the front side and the rear side of the frame 8, and is installed near the fluid shock absorber mounting portion, and reads the acceleration in the axle direction, in other words, the sleeper direction of the vehicle body. The vibration acceleration read by the sensor 4 is input to the control device 3.

The fluid buffer device 1 is connected to the burr end 7 of the bogie frame 8.
By installing the vehicle in the direction close to the crossties of the vehicle body or in the direction close to the crossties, that is, substantially in the axial direction, the bogie's left-right movement and rotational movement around the center pin 6 can be functionally suppressed. The magnitude and frequency of the damping force required for the fluid shock absorber 1 are different for the two kinds of movements of these bogies, that is, the left and right movement and the rotational movement around the center pin. Therefore, the fluid shock absorbers 1 provided at both front and rear ends of the bogie frame 8 are provided.
A valve device 2 for controlling the damping force of the fluid damping device 1 by the control device 3 so that the vibration acceleration is read by the sensor 4 with respect to the force input to the sensor 3 and processed by the control device 3 to generate a damping force corresponding to the frequency and the phase. Drive. This makes it possible to cope with two types of exercise.

The signal processing from the sensor 4 mounted near the mounting portion of the fluid damper 1 is determined by the control device 3 to be lateral movement if the phase is the same, rotational motion if the phase is opposite, and the frequency is set to 0. In the range of 3 Hz to 3 Hz, the damping force corresponding to the left-right motion damper is set to 5 Hz to 20 H
At z, a damping force corresponding to the yaw damper is generated. When the damping coefficient is changed according to the input frequency, vibrations of 20 Hz or more, which are normally harmful when transmitted through the fluid damper and transmitted to the vehicle body, are cut off by signal processing. The noise and vibration transmitted inside the vehicle can be reduced. In addition, a material or a structure that does not transmit an unnecessary frequency by using a rubber bush at a portion connecting the fluid shock absorber and the vehicle body side or the bogie side, that is, an unnecessary frequency is hardly transmitted (adjusted frequency characteristics). By using the rubber bush, the noise in the vehicle can be further reduced.

As described above, according to this embodiment, since the yaw dampers conventionally disposed on the left and right sides of the bogie are not required, the cover on the side surface of the bogie, which has been difficult in the past, can be easily attached and the noise of the bogie can be reduced. Can be easily done.

Further, during high-speed traveling, high-frequency components transmitted to the inside of the vehicle can be cut off among noises generated around the bogie, which were transmitted by the conventional yaw damper.
Room noise can be reduced.

Further, since the left-right movement damper and the yaw damper can be used together, the number of components can be reduced, and as a secondary effect, the degree of freedom of the bogie configuration can be increased.

This embodiment has the following features. (1) In a bolsterless bogie for a railway vehicle, a fluid shock absorber arranged between the bogie frame and the vehicle body at both ends of the bogie in the front-rear direction and slightly inclined with respect to the sleeper direction or the sleeper direction is provided, and attached to the shock absorber. Having a valve device arranged in the vicinity thereof through a pipe to control the shock absorber,
A high-speed and low-noise bolsterless bogie for railway vehicles, comprising a control device for controlling the valve device. (2) In the bogie of the above (1), the shock absorbers disposed at both ends in the front-rear direction of the bogie are set within a range of the damping coefficient of the left-right motion damper at a frequency of 0.3 to 3 Hz, and at a frequency of 5 Hz or more. A high-speed and low-noise bolsterless bogie for a railway vehicle, wherein a damping coefficient of a yaw damper is set within a range, and transmission preventing means is provided for a frequency of 20 Hz or more. (3) A high-speed and low-noise bolsterless bogie for a railway vehicle, wherein the shock absorber is connected to the vehicle body and the bogie via a rubber bush whose frequency characteristics are adjusted in the bogies of (1) and (2).

[0015]

According to the present invention, a railway car traveling at high speed
For both bogies, the noise of wind around the bogies and the rotational movement of the bogies
There is an effect that the vibration transmitted to the vehicle body can be reduced by suppressing the movement or the lateral movement .

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a high-speed bogie for a railway vehicle according to the present invention.

FIG. 2 is a plan view showing a conventional bogie for a railway vehicle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fluid damping device, 2 ... Valve device, 3 ... Control device, 4 ... Sensor, 5 ... Rubber bush, 6 ... Center pin, 7 ... Side burr end part, 8 ... Truck frame.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-199236 (JP, A) JP-A-61-211159 (JP, A) JP-A-52-101515 (JP, A)

Claims (2)

(57) [Claims] A pair of axles, a bogie frame supported by the pair of axles, and connecting the bogie to the vehicle body while allowing relative rotational movement and lateral movement between the bogie frame and the vehicle body in a horizontal plane. And a pair of fluid dampers connected to the bogie frame and the vehicle body to attenuate vibrations in a horizontal plane of the bogie, wherein the pair of fluid dampers travel on the bogie frame. The fluid shock absorbers are disposed at positions that are point-symmetric with respect to the center pin of the bogie frame, and are disposed substantially parallel to the axle. One end of the fluid buffer is connected to an end of each bob of the bogie frame, and the other end of each fluid buffer is connected to the vehicle body, and each of the bob of each side is installed. Near the position A pair of vibration detectors for detecting vibration of the vehicle frame are installed, and the in-phase and out-of-phase of each vibration detection result of the pair of vibration detectors are determined, and the rotation of the bogie and the right and left sides of the bogie are suppressed to the fluid damping device. And a valve device for controlling a damping force of the fluid shock absorber in accordance with a control command from the controller. 2. The bogie for a railway vehicle according to claim 1, wherein the controller determines a frequency range of a detection result of the vibration detector, and the frequency range is a frequency range corresponding to the lateral movement of the bogie. Outputting a control command to generate a damping force corresponding to a left-right motion damper, and outputting a control command to generate a damping force corresponding to a yaw damper when the frequency range is a frequency range corresponding to the rotational movement of a bogie. A bogie for railway vehicles, which was featured.