| 摘要 |
The present invention discloses a braking device for a motive winch, mainly having a sectional axle, an elastic member, two engraved chunks, and a clutch base in a retardation compartment of the motive winch; wherein said first engraved chunk is coupled to the sectional axle, having a braking plate being contacted with the frictional surface in the retardation compartment; the elastic member has an appropriate whirling force with respect to the first engraved chuck such that the braking plate of the first engraved chuck tends to press against the frictional surface of the retardation compartment; the second engraved trunk is coupled to the sectional axle and rotates synchronously, such that the first and second engraved chucks are capable of being attached to each other to push the brake plate of the first engraved trunk to generate the braking action on an inclined surface and the clutch base brings a protruded member to rotate, and the protruded members on the two engraved chunks is pushed by the protruded trunk at the inner side of the clutch base, and the axle of the motor brings the mechanical force for the clutch base. Such arrangement can stop the braking action by bringing the two engraved trucks to rotate simultaneously in the clutch base when the motor is operating. When the motive force is stopped, the pulling force due to the reaction of heavy substance comes from the cable wire reel makes the inclined plane of the second engraved trunk to push the inclined plane of the first engraved trunk such that the brake plate and the frictional surface contact with each other tightly, and hence attains the braking effect.
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