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US 2003/0153391 A1Published application
Dynamic damper with multiple degree of freedom
AssigneeNissan Motor Co., Ltd.
InventorTetsuya Kawakami
Life of this patent
Estimating the term…
Abstract
In a dynamic damper including: a torque transmissible tube member; a mass member housed within an inside of the tube member concentrically to the tube member; and a pair of elastic members, both ends of the mass member in a center axis direction of the tube member are coupled to the tube member via the pair of elastic members, the mass member includes a large mass section interposed between the pair of elastic members, a length of the mass member in the center axis direction of the tube member is longer than a diameter of the large mass section, and, from among two different bending resonance vibration modes of the tube member, a node of a higher order bending resonance vibration mode is placed at a position between the pair of elastic members.
Claims25
A dynamic damper, comprising:
- a torque transmissible tube member;
- a mass member housed within an inside of the tube member concentrically to the tube member;
- and
- a pair of elastic members, both ends of the mass member in a center axis direction of the tube member being coupled to the tube member via the pair of elastic members, the mass member including a large mass section formed between the pair of elastic members, a length of the mass member in the center axis direction of the tube member being longer than a diameter of the large mass section, and, from among two different bending resonance vibration modes of the tube member, a node of a higher order bending resonance vibration mode being placed at a position between the pair of elastic members.
1 more element
A dynamic damper, comprising:
- a torque transmissible tube member;
- a mass member housed within an inside of the tube member concentrically to the tube member;
- and
- a pair of elastic members, both ends of the mass member in a center axis direction of the tube member being coupled to the tube member via the pair of elastic members, a length of the tube member in the center axis direction thereof being longer than a diameter of the mass member, the mass member including a large mass section formed between the pair of elastic members and having a mass larger than any other portion of the mass member, and the pair of elastic members being arranged in such a manner that, from among two different bending resonance vibration modes of the tube member, a node of a higher order bending resonance vibration mode is made coincident with a center between the pair of elastic members.
1 more element
A dynamic damper, comprising:
- a torque transmissible tube member;
- a mass member housed within an inside of the tube member concentrically with respect to the tube member;
- and
- a pair of elastic members, both ends of the mass member in a center axis direction of the tube member being coupled to the tube member via the pair of elastic members, a length of the tube member in the center axis direction thereof being longer than a diameter of the mass member, the mass member including a large mass section formed between the pair of elastic members and having a mass larger than any other portion of the mass member, and the pair of elastic members being arranged in such a manner that, from among first-order and second-order bending resonance vibration modes of the tube member, a node of the second-order bending resonance vibration mode is made coincident with a center between the pair of elastic members.
1 more element
A dynamic damper, comprising:
- a torque transmissible tube member;
- a mass member housed within an inside of the tube member concentrically with respect to the tube member;
- and
- a pair of elastic members, both ends of the mass member in a center axis direction of the tube member being coupled to the tube member via the pair of elastic members and a length of the tube member in the center axis direction thereof being longer than a diameter of the mass member and the mass member including a large mass section formed on a center portion between the pair of elastic members to set a ratio of different two specific values of resonances that the dynamic damper has to a range between 2.7 and 6.3 and to place, from among two different bending resonance vibration modes of the tube member, a node of a higher order bending resonance vibration mode at a position between the pair of elastic members.
1 more element
A dynamic damper, comprising:
- a torque transmissible tube member;
- a mass member housed within an inside of the tube member concentrically with respect to the tube member;
- and
- a pair of elastic members, both ends of the mass member in a center axis direction of the tube member being coupled to the tube member via the pair of elastic members and a length of the tube member in the center axis direction thereof being longer than a diameter of the mass member and the mass member including a large mass section formed on a center portion between the pair of elastic members to set a ratio of different two specific values of resonances that the dynamic damper has to a range between 2.7 and 6.3 and to place, from among first-order and second-order bending resonance vibration modes of the tube member, a node of the second-order bending resonance vibration mode at a position between the pair of elastic members.
1 more element
Dependencies are inferred from the claim text.