4-Roller clutch
The blue roller is driving The orange one is driven.
The two small rollers are idle.
Using the pink arm to stop or reverse the orange roller’s rotation.
The mechanism’s weakness is needed measures to create pressure at
the contact places of the blue, green and yellow rollers (not shown).
4-Gear clutch
The blue gear is driving. The orange one is driven.
The two small gears are idle.
Using the pink arm to stop or reverse the orange gear’s rotation.
Measure for fixing the pink arm at its three working positions is not
shown.
The mechanism’s weakness is the possible collision of the orange gear
and the two small gears.
Gear and Roller clutch
The blue gear is driving. The orange roller is driven.
The two gear and roller combinations are idle.
Using the pink arm to stop or reverse the orange gear’s rotation.
The mechanism does not have the weaknesses shown in 4-roller clutch
or in 4-gear clutch:
Reverse mechanism 1
Violet lever has 3 positions: forward, neutral and backward.
Ball spring device for the lever positioning is not shown.
Green and blue gears are in permanent mesh. When left pink gear
is in mesh with the blue gear, grey slider goes forward. When right
pink gear is in mesh with the green gear, grey slider goes
backward.
The lever neutral position is for stopping the grey slider or setting
its position (by hand turning orange screw).
The mechanism is suitable for slow speed.
In case of fast speed to stop the input before reversing.
Bevel gear clutch for changing rotation direction 1
Bevel gear clutch for changing rotation direction 2
The pink gear is driving. The orange output shaft of a bevel
gear oscillates. The two blue gears rotate freely on the
orange shaft. The white clutch part is slidingly splined on
the orange shaft.
The clutch connecting force is due to the weight on the
green lever. The bevel drive on the right is for controlling
the clutch. The oscillation forward and backward angles
depend on transmission ratio of the said drive.
Instead of the weight action, the spring toggle mechanism can be used.
Chain drive 1E
A chain drive that can itself reverse motion direction of the chain.
On the sketch: the orange sprocket is driving, the two large chain
wheels are driven.
The animation shows the driving sprocket and chain behavior at
reverse time: from the left-to-right motion of the chain to the right-toleft
motion. For the reverse from the right-to-left motion of the chain
to the left-to-right motion, the process is similar, the chain moves
from the lower side of the orange sprocket to the the upper side.
The yellow leading plate and the pink link are key parts.
Time between two consecutive reverses depends on the chain
length.