Novel controllable telescopic rod

Abstract

The invention discloses a novel controllable telescopic rod which structurally comprises two sections of hollow telescopic rods, a worm cam, a spherical roller rotating disc, a locking gear, a shaft, a motor, a locating screw and a locking rack switch. The two sections of hollow telescopic rods are nested with each other, the spherical roller rotating disc is arranged on one section of rod through the rotating shaft, the motor is fixed to the other section of rod through the locating screw, and an output shaft of the motor is connected with a worm cam matched with the spherical roller rotating disc. The spherical roller rotating disc is fixedly connected with the locking gear, and the locking rack switch locks the spherical roller rotating disc by being meshed with the locking gear. During internal driving, the spherical roller rotating disc is locked, and the motor drives the worm cam to rotate. During external driving, the spherical roller rotating disc freely rotates, and the worm cam and the spherical roller rotating disc achieve similar movement of the rack and the gear. The novel controllable telescopic rod smoothly extends and retracts, is flexibly and accurately controlled, can achieve switching of internal driving and external driving, and is wide in application range.

Description

technical field [0001] The patent of the present invention relates to a telescopic rod with switchable drive mode, which can realize flexible switching between internal drive and external drive. Background technique [0002] Telescopic rods are widely used in daily life, and are mostly used in clothes drying rods, curtain rods, support rods, mechanical arms and other devices. The common driving telescopic methods include hydraulic cylinder, screw mechanism, rack and pinion mechanism, etc. [0003] However, the existing telescopic methods generally have the following deficiencies: the hydraulic cylinder needs hydraulic pipelines and control valves to form a complete hydraulic system, which has a complex structure, takes up a large space, and has limited application range; the screw mechanism needs to control the forward and reverse rotation of the motor to drive The screw mechanism is connected with the load to achieve expansion and contraction, and the expansion and contrac...

AI Technical Summary

Problems solved by technology

[0003] However, the existing telescopic methods generally have the following deficiencies: the hydraulic cylinder needs hydraulic pipelines and control valves to form a complete hydraulic system, which has a complex structure, takes up a large space, and has limited application range; the screw mechanism needs to control the forward and reverse rotation of the motor to drive The screw mechanism is connected with the load to achieve expansion and contraction, and the expansion and contraction speed is slow; the rack and pinion mechanism requires the motor to drive the gear to rotate in the forward and reverse directions, so as to drive the rack and the load to achieve linear reciprocating motion, thereby realizing the expansion and contraction of the rod. The expansion and contraction length is discontinuous, and Backlash error caused by gear backlash

However, none of the above telescopic methods can achieve flexible switching between internal drive and external drive, which largely limits the scope of application of the telescopic mechanism.

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