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Rotation transmitter having torque limiting mechanism
| Details |
Inventors: Tabuchi, Yasuo; Hayashi, Toshihiro; Aoki, Yuuichi; Saiki, Manabu; Ohguchi, Junichi; Sakai, Takuo;
Assignee: Denso Corporation (Kariya, JP)
Primary Examiner: Browne; Lynne H.
Assistant Examiner: Dunwoody; Aaron
Attorney, Agent or Firm: Pillsbury Winthrop LLP
A torque limiting mechanism includes an axial space formed in a cylindrical wall of a pulley, and a pin protruding and extending from a back surface of a discharge disc. The pin is inserted into the axial space, and a rubber damper is installed between the inner surface of the axial space and the pin. When torque difference between the pulley and the discharge disc exceeds a threshold, a root portion of the pin is broken to separate the discharge disc from the pulley, thereby interrupting rotation transmission from the pulley to the discharge disc. |
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DETAILED DESCRIPTION An object of the present invention is to reduce the size, weight, and production cost of a rotation transmitter including torque limiting mechanism.
According to a first aspect of the present invention, a torque limiting mechanism is disposed within an axial dimension of a driving side rotary member (cylindrical wall of a pulley).
Thus, the axial dimension of the rotation transmitter can be reduced in comparison with a conventional rotation transmitter, thereby reducing the entire size of the rotation transmitter having the torque limiting mechanism.
According to a second aspect of the present invention, a torque limiting mechanism includes an axial space formed in the pulley, and a pin protruding and extending from a discharge disc.
The pin is inserted into the axial space, and is broken when an excess torque arises between the pulley and the discharge disc.
That is, since the torque limiting mechanism is integrally provided within the pulley and the discharge disc, the torque limiting mechanism can be attained without plural friction plates.
Thus, the number of parts and assembly process for the torque limiting mechanism are reduced, thereby reducing the price of the product.
Further, the discharge disc is made of resin which is lighter and cheaper than metal material such as iron, thereby reducing the weight and the manufacturing cost of the entire rotation transmitter.
According to a third aspect of the present invention, a hub connected to a rotating shaft of rotary machine includes a torque limiting mechanism.
That is, a break portion, which is broken when the excess load torque arises between the pulley and the hub, is provided in the hub.
Thus, the torque limiting mechanism is simplified, and the number of parts and assembly process for the torque limiting mechanism are reduced, thereby reducing the cost of the product.
According to a fourth aspect of the present invention, a rotation transmitter includes a first hub and a second hub.
The first hub rotates by receiving rotation force from a pulley
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Manufacturing Materials 
