From the above discussions, to establish accurate dynamic modelling of the sprag clutch, three key issues should be discussed, including geometry deformation coordination model, the calculation method of the normal contact force, and the friction model in contacts.
The purpose of this paper is to develop a multiarc sprag clutch model considering geometry and internal interaction, fully reflecting the dynamic behavior of multiarc sprag clutch during engagement.
In the following section, the calculation method of the normal contact force and friction force in contacts are proposed, and a multi-arc sprag clutch model considering geometry and internal interaction is established.
Figure 2 shows a simplified configuration of a complete sprag clutch in initial contact position and three sketch maps to illustrate the changes of engagement conditions.
In 1994, he registered his 19th patent, at the age of 75, for a sprag retainer with rotational restraint.
It was one of the toughest challenges ever presented in the design of sprag overrunning crutches for a for a helicopter application.
You look at something and it tells you something." To Ted Zlotek, a helicopter drive-train sprag can say an awful lot.
Figure 1 shows the structural schematic of one-way clutch, two-shaft assembly, which is composed primarily of bearing (1, 2), gear (1, 2), sprags
, input shaft, output shaft, and inner ring.
Formsprag Clutch (South Beloit, IL) has introduced a new high speed backstop designed with inner race centrifugal throw-out sprags
to meet the backstopping requirements of inclined conveyors or bucket elevators that use a gear reducer with the backstop mounted externally on the high speed or intermediate shaft.
An extract from a pamphlet called Don'ts for Miners and Mine Officials published in the Western Mail in 1899: Don't ill-treat the horse for every little mishap, especially when it arises from your carelessness; Don't throw stones or sprags
at horses; Don't place your food box in the horse's nose bag; Don't assume a horse works better on an empty nose bag.
The trackage is roughly laid and dumb buffered wagons of a crude type lie around the yard complete, with sprags
of wood which were lobbed under the wheels to stop them from rolling.