Meshing Mechanical Speed ​​Limiting Mechanism

Abstract

The invention provides an engaging type mechanical speed limiting mechanism. The engaging type mechanical speed limiting mechanism comprises a box, a speed limiting inner gear ring and an eccentric gear, wherein the speed limiting inner gear ring and the eccentric gear are installed in the box. The speed limiting inner gear ring is installed on a spindle in a clearance fit mode, the spindle is sleeved with a cylindrical torsional spring for fixedly connecting the box and the inner gear ring, and flat keys are symmetrically machined on the segment, connected with the eccentric gear, of the spindle for installation of the eccentric gear. A centrifugal rail is machined in the eccentric gear, and key slots matched with the flat keys of the spindle are formed in the centrifugal rail. The interior of a centrifugal spring penetrates through the lower flat key of the spindle to be kept in contact with the lower half portion of the outer surface of the spindle, a metal blocking piece abuts against the eccentric gear, and the end face of the metal blocking piece is welded to the spindle. When the rotating speed of the spindle is too high, the eccentric gear is in an eccentric state to be engaged and clamped with the inner gear ring to drive the inner gear ring to rotate together so as to reduce the speed. The engaging type mechanical speed limiting mechanism is suitable for occasions where the rotating speed is limited but not required to be fixed in engineering drive, the speed reduction process is rapid and reliable, the structure is simple, and use is convenient.

Description

technical field [0001] The invention relates to a mechanical speed limiting mechanism, in particular to a mechanism for limiting the excessively high output rotational speed in mechanical transmission. Background technique [0002] In mechanical engineering, reducers are mostly used to achieve the speed required by the load, and the development of existing reducers has become mature. Gear reducers, worm gear reducers and other types of reducers have various standards and can be selected according to needs. At present, these reducers, on the basis of external power, can realize the reduction of a certain transmission ratio, and at the same time, there are problems such as complex structure, large volume, and high cost. [0003] At present, there are also some speed-limiting mechanisms, most of which use the friction between the friction plate and the moving part to control the deceleration. The friction plate will not only cause energy loss, but also reduce the friction forc...

AI Technical Summary

Problems solved by technology

At present, these reducers can achieve a deceleration with a certain transmission ratio on the basis of external power, but at the same time there are problems such as complex structure, large volume, and high cost.

[0003] At present, there are also some speed limiting mechanisms, most of which use the friction between the friction plate and the moving parts to perform deceleration control. The friction plate will not only cause energy loss, but also the friction force will decrease after a certain period of use, resulting in poor braking effect and even need to replace the friction plate. piece

[0004] In order to improve the deficiencies of the existing reducer and the inconvenience of use and energy loss of the existing speed limiting mechanism, a speed limiting device with simple structure, flexible use and low cost is needed

Images