Pinion-and-rack type elevator under balanced drive

Abstract

The invention discloses a pinion-and-rack type elevator under balanced drive. The pinion-and-rack type elevator is characterized in that a driving system is a balanced driving system; an active force transmission system is a synchronous belt transmission system; an electric traction system is a permanent magnet direct current motor system or a permanent magnet alternating current synchronous motor system; a lower right driving drive gear and a lower right driven drive gear are engaged with a right rack which is fixed in the vertical direction from the back and the front of the lower portion, an upper right driving drive gear and an upper right driven drive gear are engaged with the right rack which is fixed in the vertical direction from the back and the front of the upper portion, a lower left driving drive gear and a lower left driven drive gear are engaged with a left rack which is fixed in the vertical direction from the back and the front of the lower portion, and an upper left driving drive gear and an upper left driven drive gear are engaged with the left rack which is fixed in the vertical direction from the back and the front of the upper portion, so that a lift car system of the elevator is driven to ascend or descend; a brake wheel, coaxial with a motor shaft, of the elevator is configured with a double-backup power-losing braking brake; and an electric control system is internally provided with a 'power failure star connection' unit circuit which is electrically interlocked and mechanically interlocked.

Description

technical field [0001] The invention relates to the field of elevators, in particular to a rack and pinion elevator. Background technique [0002] Some existing rack-and-pinion elevators have their own advantages, but there are also some points for improvement, including, some schemes are single-sided drive, so the elevator car is subjected to a single-sided driving force, and the load transported by the elevator car The distribution is random. For example, when a freight elevator carries items with a large specific gravity or transports goods with a trolley, the load will be concentrated on a small area at the bottom of the car, so that the car bears the concentrated load. If these concentrated loads are distributed If the weight is on the side with the driving force, then the driving force and the direction of the load should correspond. If the distribution is uniform, although the driving force and the direction of the load are somewhat offset, the negative impact is not ...

AI Technical Summary

Problems solved by technology

[0002] Some existing rack-and-pinion elevators have their own advantages, but there are also some points for improvement, including, some schemes are single-sided drive, so the elevator car is subjected to a single-sided driving force, and the load transported by the elevator car The distribution is random. For example, when a freight elevator carries items with a large specific gravity or transports goods with a trolley, the load will be concentrated on a small area at the bottom of the car, so that the car bears the concentrated load. If these concentrated loads are distributed If the weight is on the side with the driving force, then the driving force and the direction of the load should correspond. If the distribution is uniform, although the driving force and the direction of the load are somewhat offset, the negative impact is not too great. side, the force on the elevator car will be severely unbalanced, which will become a serious hidden danger to safe and stable operation; it is impossible for ordinary users to know whether the driving force of the elevator car is balanced or biased to one side, and the instructions for use can generally only be It is required that when using the elevator, the goods should be placed in the middle of the car and avoid concentrated loads, but in some cases it is impossible to do so, for example, when the trailer enters and exits the car, the car will be subjected to a large gravity force Function, after the trailer enters the car, it does not necessarily stop in the middle of the car, resulting in heavy loads, etc.; but if non-single-sided drive is used, the transmission system is more complicated and heavy. Symmetrical drive scheme), some include multi-stage transmission, and some have manual devices, including handwheels or handles, gear transmission systems, turning clutches, and electric motors, which make the elevator car heavy and increase energy consumption , which reduces the effective transport capacity; therefore, how to achieve stable operation and light weight of the elevator car is an important part of the improvement of the rack and pinion elevator

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