Crank loop
The crank slider (also Scotch-Yoke crank drive ) is a gear of the slider crank chain , a subordinate of the four- link coupling gear . The sliding (“dragging”) link moves on one of the two rockers (with the slider crank on the link fixed to the frame ). It is either a revolving crank slide (both rockers revolve) or an oscillating crank slide (one of the rockers is a revolving crank ).
For the sake of simplicity, the sliding joint is often combined with the swivel joint adjacent in the sliding block to form a double joint: a pin rotates in a slot and also slides in it. In such a case, the linkage has only three links. Wear is less if the sliding block is retained.
swinging crank loop
offset swinging crank loop (the swing arm with pusher is kinked)
centric swinging crank loop (the swing arm with push stone is straight)
execution as a hoe mechanism
Maltese cross gear with centric oscillating crank loop. As long as the pin of the crank engages in the slot in the rocker, the crank and rocker are coupled. In between, the crank locks the rocker arm and the pin runs empty.
The rocker arm differs from the slider crank in that the rotary-push joint is replaced by an additional coupling link with two rotary joints .
Applications
- Film gripper gears in film cameras and projectors and in horizontal slotting machines
Individual evidence
- ↑ Dankert / Dankert: technical mechanics , crank slider: swinging push stone
- ↑ RWTH Aachen University: Gear model collection , crank loop, swinging offset ( Memento of the original from March 5, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Dankert / Dankert: technical mechanics , crank slider: swinging push stone
