Determine the modulus m according to the load
Determine the index circle diameter of the driven gear D, D=m*z (where z is the number of teeth of the gear) rack;
The number of teeth of the gear needs to be based on the torque of the load, The structure is considered comprehensively. When the torque is large, the number of teeth of the gear can be selected to be larger, so that the diameter of the gear is larger, otherwise, the diameter can be made smaller. Remember the key formula above: D=m*z, this is an important formula.
After determining the index circle diameter D of the gear, the circumference of the index circle diameter can be calculated, assuming it is L. The above is the design principle of rack and pinion.
Introduction of rack and pinion drive elevator
The rack and pinion drive elevator can transport people and goods. It is mainly composed of a tower, fence, engine compartment, driving device, control system, sectioning device, safety device, and lifting system. Compared with simple elevators, rack-and-pinion-driven elevators have the characteristics of large height, fast erection speed, safety and reliability, and dual-use for people and goods. They are widely used in building construction, especially high-rise building construction. 1 Tower: a pipe truss structure composed of several standard sections. In order to ensure the stability of the tower, the attachment rods are used to connect to the building once at a certain height (about 10-15 meters). The tower section is equipped with racks and guide rails. 2 Carriage and fence: When the carriage descends into the fence, the door opens automatically, and the door closes automatically when it rises. To ensure operational safety. The bottom of the fence is equipped with a spring buffer device. Avoid impact when the machine is on the ground to ensure a smooth shutdown. The cabin is a container for carrying people or goods, and the fence is a device that encloses the cabin and the tower and is located at the bottom of the tower. Mechanical-electrical interlocking for cabin door and fence door. 3 Drive device: The section-adding device is located on the top of the carriage, and is a manual or motorized small boom crane. When the section is added, the carriage rises to a certain distance from the top of the tower, and the standard section to be added is hoisted to the top of the tower by a crane, and after it is fixed in place, the sectioning process is completed. In order to ensure the safe operation of the elevator, it is equipped with a speed limit brake device, a travel limit switch, and a door protection switch. It is located in the engine compartment and consists of a motor, a reducer, and a rack and pinion. The gear at the output shaft end of the reducer extends out of the engine compartment, meshes with the rack fixed on the tower and runs the engine compartment up and down. There is a control system in the cabin, and the operator can also run it randomly.
