Tapered braking device for 9500LBS electric winch
The present invention discloses a tapered braking device for 9500LBS electric winch disposes a section of gear shaft, a section of core shaft, a wedge shape support, braking plates, an elastic element, a wedge shape piece A, a wedge shape piece B, a braking clutch base and so on in a gear box of an electric winch.
When a motor works, the section of core shaft of the motor can drive the braking clutch base and the wedge shape pieces A, B to rotate, until a gap is formed between the friction faces of the wedge shape support and the wedge shape piece B and the braking plates so that the braking action stops. When the motor suddenly stops, a heavy load lifted by a tight wire rope reel provides a reverse pulling force so that the wedge shape piece B produces a reverse thrust force to push the friction faces of the braking plates, so the braking effect is achieved quickly. Based on the braking plates with the double tapered faces, the present invention can increase the braking area and the braking force and achieve safe braking. Furthermore, worn parts concentrate in the braking plates, so it only needs to replace the braking plates made of friction materials, which can simplify maintenance, reduce the costs and ensure service life of the gearbox.
Electric brakes pull goods via reeling tight wire rope for self-aid and buddy aid in automobile accidents in the fields. For avoiding stall of tight wire rope caused by sudden power cut during retracting, braking devices are disposed forensuring safe operation.
The braking device uses the section of core shaft extending from the motor shaft to drive the braking clutch base to rotate. Inner double flanges in the braking clutchbase simultaneously drive the wedge shape piece A and the wedge shape piece B to rotate. At this time, the braking plate on the wedge shape piece B and a friction tapered face of the gear box still keep a gap therebetween, so the braking device is in anon-braking state. When the motor suddenly stops, the inertia of the braking clutch base causes that the wedge shape piece B moves axially while rotating to drive the braking plate to achieve the single tapered face braking for the gear box.
However,the braking device has the shortcomings that the braking area and the braking force produced by the single tapered face braking is small, which will easily cause slipping phenomena, and more chiefly the braking plate directly acts on the tapered face ofthe gear box, which will easily make the tapered face to be wearing directly, so that the tapered face lose braking efficacy.
Then the gear box must be replaced, which causes difficult maintenance and high replacement cost of parts.
An object of the present invention is to provide a tapered braking device for electric winch which has the advantages of larger braking area, good braking effects, lower replacement cost of parts and avoiding wearing a gear box directly.
To achieve the above-mentioned object, a tapered braking device for electric winch in accordance with the present invention is disclosed.
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