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Knightrous
Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
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Double Dragon - Team BotBitz - QLD
For the last few months, Steve and I have been working together on a BotBitz joint project. With the development of the BotBitz 150A ESC, we wanted to find a way to test these to the max, so where would you be able to test 150A ESC's to the MAX?
ROBOGAMES!
We decided that building just a heavyweight would be a fair task, so we decided to go with a pair of middleweight sized robots as a cluster-bot heavyweight.
We're sorta building it as we go with just a base few parts we have gathered, but these are the specs so far.
Name:
Double Dragon
Drive:
1.3Kw 12v Winch motors @ 14.8v, driving 10" front go kart wheels
Electronics:
BotBitz 150A Prototype speed controllers, Spektrum TX/RX, Whyachi MS2 power switches.
Batteries:
4S 12800mAh 40C LiPol batteries
Chassis/Armor:
Bisalloy, Hardox and Steel.
Weapon:
Wedge, Lifter* or Flamethrower* (Pending on time / space / weight) _________________ https://www.halfdonethings.com/
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Wed Feb 06, 2013 12:10 am |
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Knightrous
Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
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Winch motor post!
The full sized 4000lb winch. It's about 6-kg
The spool and secondary gearbox removed.
The end plate removed to reveal a single 5.1:1 stage reduction
Behind the first stage is the pinion gear, which is fitted into a 1-way sprag clutch
The pinion is fitted to the clutch using a 6MM hex shaft
Below the clutch reveals the motor shaft, which is a double D.
Stripping the motor down. You can see the big terminals on the brush housing, the 4 brushes, a crappy bush bearing for the armature (might look at replacing this with a ball bearing)
The armature with it's large radial commutator
~3.7KG for the base, will be closer to 4.5KG by the time we are done with it.
The secondary gearbox
This is how it is setup in the winch configuration, the first stage drives the little hex bar through the center of the spool and connects to the secondary gearbox with the remaining two stages.
The secondary gearbox casing is nearly the same, except a bit longer for the dual stage setup.
All three stages can be jacked together successfully, so a big assed 135:1 gearbox could be built for a lifter or clamper
In fact, I sort of have already worked that out...
And a quick look at the next face plate design with 25M bearings
_________________ https://www.halfdonethings.com/
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Wed Feb 06, 2013 10:39 am |
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