JP2898870B2 - Hull support mechanism for current collectors for railway vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boat support mechanism for a current collector for a railway vehicle.

[0002]

2. Description of the Related Art Heretofore, in order to reduce the aerodynamic noise of current collectors for railway vehicles, the cross section of the hull has been made elliptical or wing-shaped. However, an elliptical or wing-shaped hull has lift. When lift is generated in the hull, the contact force between the trolley wire and the slide plate increases, causing a problem that excessive stress is generated in the trolley wire. for that reason,
The lift generated on the hull had to be kept within a certain range.

FIG. 3 is an explanatory view of a boat support mechanism of a current collector for a railway vehicle having a boat body having an elliptical cross section according to the prior art. Here, 1 is a boat body, 2 is a slide plate, 3 is a lifting device, 4 is a support spring, 6 is a trolley wire, 9 is a vertical guide, and 10 is a linear bearing. The boat support mechanism in the conventional railway vehicle current collector includes a boat 1 and a lifting device 3.
And a vertical guide 9 located at the center of the boat 1.

[0004]

According to the prior art,
A large lift is generated in the hull of a current collector for a railway vehicle having an elliptical or wing-shaped cross section. And this lift
Varies greatly depending on the wind speed and direction, and the speed of the vehicle.
In the conventional hull support mechanism shown in FIG.
When born, the trolley wire pushes down the hull and its lift
Since the hull rises to a position where the trolley wire is balanced, there is a problem that the contact force between the trolley wire and the contact plate increases and excessive stress is generated in the trolley wire. Therefore, by changing the pushing force of the hull in accordance with the speed, or by actively controlling the pushing force of the hull in accordance with the contact force between the contact plate and the trolley wire, the contact between the contact plate and the trolley wire is achieved. It is considered that the increase in power is suppressed. However, the method of changing the pushing force of the hull according to the speed cannot cope with the phenomenon that the lift of the hull increases when the train travels in the tunnel, and the method of actively controlling the pushing force is not available. There was a problem that the system was complicated and difficult to adopt.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a boat support mechanism for a current collector for a railway vehicle having a boat body having an elliptical or wing-shaped cross section. The hull of a current collector for railway vehicles, in which the contact force between the trolley wire and the slide plate is increased by suppressing the lift generated in the hull within a certain range, and excessive stress is not generated on the trolley wire. It is to provide a support mechanism.

[0006]

According to the first aspect of the present invention, the boat hull supporting mechanism of the current collector for a railway vehicle is provided in a vehicle traveling direction.
A boat body having an elliptical cross-sectional shape having a long axis
A contact plate that comes into contact with a trolley wire attached to the upper surface of the body;
Pushing up the hull until the slide comes in contact with the trolley wire
Device and a position ahead of the aerodynamic center position of the hull in the traveling direction
And provide elasticity around the rotation axis of the boat body
A support spring, which provides damping for movement about the axis of rotation.
Dashpot, which launches into the hull while driving
This suppresses the generation of the generated lift . The hull supporting mechanism of the current collector for a railway vehicle according to claim 2 of the present invention is a vehicle.
Hull with an airfoil cross-section with chord lines in the running direction
And a slide in contact with the trolley wire attached to the upper surface of the hull
Push the hull up until the contact plate touches the trolley wire.
And a push-up device that is located forward of the aerodynamic center of the hull.
And provide elasticity around the rotation axis of the boat body
A support spring, which provides damping for movement about the axis of rotation.
Dashpot, which launches into the hull while driving
This suppresses the generation of the generated lift .

[0007]

[Operation] The center of rotation of the hull is set forward of the aerodynamic center of the aerodynamic force generated in the hull in the train traveling direction. As a result, when an upward lift is generated in the hull, a pitching moment of head-down is generated, and the hull rotates to a position in which no upward lift is generated. Conversely, when a downward lift is generated in the hull, a pitching moment of head-up is generated, and the hull rotates to a position where there is no longer a downward lift. In addition, dashpots provide damping to prevent instability of the hull's motion. Based on the above principle, it is possible to prevent the boat body from generating excessive lift. By the slight rotation of the hull,
Since the lift generated before rotation is canceled,
The height fluctuation of the contact point between the hull and the trolley wire due to the
There is almost no change in the contact force due to the height change.

[0008]

1 is an explanatory view of one embodiment of a boat support mechanism of a current collector for a railway vehicle according to a first aspect of the present invention. Here, 1 is a hull, 2 is a slide plate, 3 is a lifting device, 4 is a support spring, 5 is a dashpot, 6 is a trolley wire, 7 is a rotation axis of the hull, and 8 is the aerodynamic center position of the hull. is there. The lifting device 3 and the boat 1 having an elliptical cross section are connected by a horizontal rotation shaft 7 of the boat. Therefore, the hull 1 rotates
It is rotatable up and down around a shaft 7. Further, the support spring 4 gives an elastic restoring force around the rotation axis 7 of the boat body, and the dashpot 5 gives a damping around the rotation axis 7 of the boat body. The rotation axis 7 of the hull is located forward of the aerodynamic center 8 of the hull having an elliptical cross section. did
As a result, when an upward lift is generated in the hull 1, the hull
Turns counterclockwise to lower the head,
The power disappears. If a downward lift occurs, the reverse is true.
However, also in this case, the lift disappears rapidly.

FIG. 2 is an explanatory view of one embodiment of a boat support mechanism of a current collector for a railway vehicle according to a second embodiment of the present invention.
Here, 1 is a hull, 2 is a slide plate, 3 is a lifting device, 4 is a support spring, 5 is a dashpot, 6 is a trolley wire, 7 is a rotation axis of the hull, and 8 is the aerodynamic center position of the hull. is there. Push-up device 3
The hull 1 having a wing-shaped cross section is connected by a rotation shaft 7 of the hull. Further, the support spring 4 gives elasticity around the rotation axis 7 of the boat body, and the dash pot 5 gives attenuation around the rotation axis 7 of the boat body. Hull rotation axis 7
Are located forward of the aerodynamic center 8 of the hull having a wing-shaped cross section. Therefore, as in the embodiment of FIG.
An operation to cancel the raw lift is performed.

[0010]

As described above, according to the present invention, the lift generated in the hull is kept constant in the hull supporting mechanism of the current collector for a railway vehicle having an oval or wing-shaped cross section. , The contact force between the trolley wire and the contact plate increases, so that a boat body support mechanism for a current collector for a railway vehicle in which excessive stress is not generated in the trolley wire can be realized. Therefore, there is no adverse effect on the train line during traveling.

[Brief description of the drawings]

FIG. 1 is an explanatory view of one embodiment of a hull support mechanism of a current collector for a railway vehicle according to claim 1 of the present invention.

FIG. 2 is an explanatory view of one embodiment of a boat body support mechanism of a current collector for a railway vehicle according to a second embodiment of the present invention.

FIG. 3 is an explanatory view of a boat body support mechanism of a current collector for a railway vehicle having an elliptical boat body shape according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boat body 2 Slipped plate 3 Push-up device 4 Support spring 5 Dash pot 6 Trolley wire 7 Boat axis of rotation 8 Aerodynamic center position of boat body 9 Vertical guide 10 Linear bearing

Claims (2)

(57) [Claims] 1. A hull support mechanism for a current collector for a railway vehicle, comprising: a hull having an elliptical cross-sectional shape having a long axis in a vehicle traveling direction; and a trolley wire attached to an upper surface of the hull. A contacting plate, a push-up device for pushing up the boat until the contacting plate comes into contact with the trolley wire, and a driving method from the aerodynamic center position of the boat.
Consists of a rotating shaft of該舟body located toward the front, a support spring providing elasticity around the rotary shaft, a dashpot providing damping for movement about the rotation axis, generated該舟body while driving A hull support mechanism for a current collector for a railway vehicle, which suppresses generation of lift. 2. A boat body support mechanism for a current collector for a railway vehicle, comprising: a boat body having a wing-shaped cross section having a chord line in a vehicle running direction; and a trolley wire attached to an upper surface of the boat body. A contact plate, a push-up device for pushing up the boat until the contact plate comes into contact with the trolley wire, a rotation axis of the boat located forward of the aerodynamic center position of the boat, a supporting spring providing elasticity around the axis consists of a dashpot providing damping for movement about the rotation axis, collector for railway vehicles, characterized in that to suppress the occurrence of lift generated on該舟body while driving Hull support mechanism for electrical equipment.