Another arrangement of jumping motion
Another arrangement of jumping motion. Motion is communicated to worm-gear, B, by worm or endless screw at the bottom, which is fixed upon the driving-shaft. Upon the shaft carrying the worm-gear works another hollow shaft, on which is fixed cam, A. A short piece of this hollow shaft is half cut away. A pin fixed in worm-gear shaft turns hollow shaft and cam, the spring which presses on cam holding hollow shaft back against the pin until it arrives a little further than shown in the figure, when, the direction of the pressure being changed by the peculiar shape of cam, the latter falls down suddenly, independently of worm-wheel, and remains at rest till the pin overtakes it, when the same action is repeated.
Only the input is driven; every other part of this model moves by physics (MuJoCo), and its ratios are measured. Run it live, change its parameters, or switch the friction off to see the output stop.
- Modelled as
- Brown's figure 64: No. 31's worm (the driven shaft) turns the worm-gear B; a pin in B's shaft drives the cam A's hollow shaft, half cut away; A is an eccentric on which a spring lever's roller bears
- Measured
- B/worm 0.0333 (1/30); A carried 1:1 by the pin up its rise (0.9999, 1.0–4.5 s); past the top the spring throws A ahead onto its low point (~2.3 rad in a fraction of a second) and it waits there (
- Notes
- 0.0003, 6.8–9.4 s, at 5.95 rad) until the pin comes round; max penetration 0.03 mm; also passes at 120 and 300 rpm with time-scaled windows
Film (MP4) · GIF · Still (PNG) · Spec (YAML) · Model (MJCF)
