Preload disk spring, assembly structure thereof, and fan using same
First Claim
1. A preload disk spring, comprising:
- a main body having a radially inner side defining an opening axially extended through the main body, a radially outer side, a first contact surface defined between the inner side and the outer side, at least one retainer projected from the first contact surface, and at least one notch located offset from the at least one retainer;
a plurality of extended elements being formed on the inner side of the main body to radially extend toward a center of the opening;
at least one protruded portion being formed on and radially projected from the inner side of the main body toward the center of the opening, and having a second contact surface; and
wherein the notch is formed on the outer side of the main body and is radially recessed from the outer side.
1 Assignment
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Accused Products
Abstract
A preload disk spring assembly structure for applying a preload to a bearing includes a first and a second main body correspondingly connected to each other face to face. The first main body is provided with at least one first retainer, at least one first notch, and at least one first protruded portion. Similarly, the second main body is provided with at least one second retainer, at least one second notch, and at least one second protruded portion. When the first and the second main body are aligned with each other such that the first retainer is tightly engaged with the second notch, the first notch is tightly engaged with the second retainer and the first protruded portion correspondingly contacts with the second protruded portion, the first and the second main body are brought to assemble together and form an integral body.
11 Citations
19 Claims
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1. A preload disk spring, comprising:
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a main body having a radially inner side defining an opening axially extended through the main body, a radially outer side, a first contact surface defined between the inner side and the outer side, at least one retainer projected from the first contact surface, and at least one notch located offset from the at least one retainer; a plurality of extended elements being formed on the inner side of the main body to radially extend toward a center of the opening; at least one protruded portion being formed on and radially projected from the inner side of the main body toward the center of the opening, and having a second contact surface; and wherein the notch is formed on the outer side of the main body and is radially recessed from the outer side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A preload disk spring assembly structure, comprising:
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a first main body having a radially first inner side defining a first opening axially extended through the first main body, a radially first outer side, a first contact surface defined between the first inner side and the first outer side, at least one first retainer projected from the first contact surface, and at least one first notch located offset from the at least one first retainer; a plurality of first extended elements being formed on the first inner side of the first main body to radially extend toward a center of the first opening; at least one first protruded portion being formed on and radially projected from the first inner side of the first main body toward the center of the first opening, and having a second contact surface; a second main body having a radially second inner side defining a second opening axially extended through the second main body, a radially second outer side, a third contact surface defined between the second inner side and the second outer side to correspondingly contact with the first contact surface, at least one second retainer projected from the third contact surface to tightly engage with the at least one first notch, and at least one second notch located offset from the at least one second retainer to tightly engage with the at least one first retainer; a plurality of second extended elements being formed on the second inner side of the second main body to radially extend toward a center of the second opening, and the second extended elements being in a one-to-one correspondence with the first extended elements; and at least one second protruded portion being formed on and radially projected from the second inner side of the second main body toward the center of the second opening, and having a fourth contact surface to correspondingly contact with the second contact surface;
whereby the first main body and the second main body are assembled together to form an integral body. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A fan, comprising:
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a base having a bearing cup axially forward projected therefrom for receiving at least one bearing therein, and the bearing each having a shaft hole; a stator assembly being externally fitted around the bearing cup; a rotor being configured corresponding to the stator assembly and having a shaft extended through the bearing via the shaft hole thereof; and
the shaft being provided with an annular retaining groove for engaging with a retaining element; anda preload disk spring assembly structure being fitted around the shaft of the rotor to locate between the bearing and the retaining element, and including; a first main body having a radially first inner side defining a first opening axially extended through the first main body, a radially first outer side, a first contact surface defined between the first inner side and the first outer side, at least one first retainer projected from the first contact surface, and at least one first notch located offset from the at least one first retainer; a plurality of first extended elements being formed on the first inner side of the first main body to radially extend toward a center of the first opening; at least one first protruded portion being formed on and radially projected from the first inner side of the first main body toward the center of the first opening, and having a second contact surface; a second main body having a radially second inner side defining a second opening axially extended through the second main body, a radially second outer side, a third contact surface defined between the second inner side and the second outer side to correspondingly contact with the first contact surface, at least one second retainer projected from the third contact surface to tightly engage with the at least one first notch, and at least one second notch located offset from the at least one second retainer to tightly engage with the at least one first retainer; a plurality of second extended elements being formed on the second inner side of the second main body to radially extend toward a center of the second opening, and the second extended elements being in a one-to-one correspondence with the first extended elements; and at least one second protruded portion being formed on and radially projected from the second inner side of the second main body toward the center of the second opening, and having a fourth contact surface to correspondingly contact with the second contact surface;
whereby the first main body and the second main body are assembled together to form an integral body;wherein the shaft is extended through the first and the second opening, so that the first and the second main body are fitted around the shaft with the first extended elements contacted with and pressed against the bearing and the second extended elements contacted with and pressed against the retaining element. - View Dependent Claims (18, 19)
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Specification