Machine room-free cargo ladder

Abstract

The invention discloses a machine room-free cargo ladder. The machine room-free cargo ladder comprises a counterweight and a lift car which are arranged in a hoistway, a traction machine and a traction wheel, wherein the counterweight is connected with the traction wheel and the lift car through the steel wire rope, the ladder is characterized in that a left counterweight wheel and a right counterweight wheel are arranged on the top of the counterweight, two groups of left car bottom wheels and two groups of right car bottom wheels are arranged at the bottom of the car, the traction wheel is arranged right above the left-side counterweight wheel and the right-side counterweight wheel, the top of the well channel is provided with a guide wheel and two groups of transmission wheels with the same diameter, the top of one end of the steel wire rope is connected with the top of the well, the other end sequentially bypasses the left-side counter-weight wheel, the traction wheel, the right-side counter-weight wheel, a guide wheel, a group of left car bottom wheels, a group of right car bottom wheels, two sets of transmission wheels, another group of right car bottom wheels, and the other group of left car bottom wheels are connected with the top of the well. The traction wheel disclosed has the advantages that the traction force of the traction wheel is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to a car elevator, in particular to a machine room-less freight elevator. Background technique [0002] Freight elevators are mainly used for the transportation and lifting of goods. Among them, its carrying capacity is relatively large. When adopting a hoistway without a machine room, the traction sheave and the traction machine are generally arranged above the car, and the guide sheave 102 is installed next to the traction sheave 101, so that the contact angle between the traction sheave and the wire rope 103 is 130° ~160°, see figure 1 shown. That is to say, the wire rope is not completely covered with the upper part of the traction sheave, which will result in a relatively small traction force. At the same time, the traction machine must increase its traction force to ensure the traction force of the wire rope. Power, and the cost will be higher if the counterweight and the gravity of the car are increased, which will lead...

AI Technical Summary

Problems solved by technology

That is to say, the steel wire rope is not completely covered with the upper part of the traction sheave, which will lead to relatively small traction force. At the same time, the traction machine must increase its traction force to ensure the traction force of the steel wire rope. power, and to increase the counterweight and the gravity of the car, the cost will be higher, which will lead to high energy consumption, and the traction machine will use a larger model, and the cost will be even higher

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