Manual worm gearscrew liftsummary:
Small screw elevators are increasingly being used in high-precision industries such as instrumentation and machinery due to their compact appearance, convenient installation and performance. There are various models and specifications of screw elevators to choose from, ranging from 0.5T to over 100T according to different load conditions. Screw or nut movements can be selected according to different installation and usage spaces, and the lifting height can be customized according to customer needs. Configurable accessories such as encoders and brakes.
worm screw liftThe lifting and lowering are completed by a combination of worm gear and screw, and the deceleration is achieved by the combination of worm gear and worm gear. The lifting speed of the elevator has two types: fast and slow. The fast speed travels 1.67 meters per minute, and the slow speed travels 0.4 meters per minute. It can be adjusted according to different usage situations. It can be operated by electric or manual means. Generally, slow speed is preferred for manual operation. When driven by external force, the torque force of the screw lift varies due to different speeds. The slow speed is relatively larger, so the torque force will be greater and the use will be more labor-saving.
The principle of a hand cranked worm gear screw elevator is similar to that of a regular motor. The difference is that it is driven by the hand wheel to rotate the worm gear, which uses the transmission of the worm gear to make the worm gear rotate. The center of the worm gear is an internal thread structure, equivalent to the nut of the lifting screw, matched with the lifting screw, and the worm gear rotates to drive the screw to move axially.
The screw lift has two structural forms: screw movement and nut movement. The motion form of the screw rod is the rotation of the screw and the movement of the nut. This transmission form requires a guide device to restrict the rotation of the nut. Its characteristics are compact structure and good rigidity of the screw. Suitable for occasions with large work schedules. Nut movement refers to the fixing of the nut and the rotation and movement of the screw. This transmission form eliminates the additional axial displacement that may occur in the screw bearing due to the supporting role of the nut itself. The structure is relatively simple and can achieve high transmission accuracy. But its axial dimension should not be too long, otherwise the rigidity will be poor. Therefore, it is only suitable for situations with small travel distances.
When selecting a screw lift, attention must be paid to the matching of the screw shaft speed and the load it can bear. Whether it is static load, dynamic load, or impact load, it cannot exceed the maximum load it can bear. The lift with sufficient capacity should be selected based on the safety factor, usage stroke, and the stability of the screw. The allowable speed of the elevator input shaft is 1500r/min, and the input shaft must not exceed this speed.
