US 4,653,594 AGranted

Vibration generating apparatus

AssigneesNippon Telegraph & Telephone Public Corporation, Hitachi, Ltd.

InventorsHiroshi Yamamoto, Shuichi Satoh, Yoshiyuki Iwai, Osamu Ae, Masao Suda, Minoru Shiozaki, Kiyoshi Tsuchiya, Manabu Nakano, Kojiro Ogata, Naoki Miyanagi, Kozo Ono, Nobuyuki Tobita

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Abstract

A vibration generating apparatus including a support body having a first center axis, a first spherical joint element provided at a forward end of the support body and having the center of a sphere located on the first center axis, a vibrating body having a second center axis passing through the sphere center, a second spherical joint element provided on the vibrating body and concentric complementary with the first spherical joint element to cooperate therewith to allow the vibrating body to be supported on the support member for universal movement, a rotary shaft coaxially rotatably supported within the vibrating body, a pair of eccentric weights mounted on the rotary shaft with a phase deviation of 180 degrees and in a manner symmetrical with respect to the sphere center, and a drive motor connected to the rotary shaft for driving same for rotation whereby the pair of eccentric weights are rotated about the second center axis to cause the vibrating body to move in conical motion vibration such that the second center axis describes a circular cone having a vertex located at the sphere center about the first center axis.

Claims7

Dependent claims

A vibration generating apparatus comprising:

a support body having a first center axis;
a first spherical joint element provided at a forward end of said support body and having the center of a sphere located on said first center axis;
a vibrating body having a second center axis passing through the sphere center of said first spherical joint element;
a second spherical joint element provided on said vibrating body, said second spherical joint element being concentric and complementary with the first spherical joint element and cooperating therewith to allow the vibrating body to be supported on the support body for universal movement;
a rotary shaft coaxially rotatably supported within the vibrating body;
a pair of eccentric weights mounted on the rotary shaft in such a manner that they deviate from each other in phase by 180 degrees and are symmetrical with respect to the sphere center of the first and second spherical joint elements;
and
drive means connected to the rotary shaft for driving same for rotation whereby the pair of eccentric weights are rotated about the second center axis to cause the vibrating body to move in conical motion vibration such that the second center axis describes about the first center axis a circular cone having a vertex located at the sphere center of the first and second spherical joint elements.

5 more elements

Dependencies are inferred from the claim text.