Train GBC - Tipper Unloader Module

[doug72]

PP

Train GBC - Tipper Unloader Module

I set out to make a new version of the unloader module, the starting point was to use this part to achieve my aim. 
LEGO Green Block Connector with One Half of Wormed Gearbox (32166) x two piece.

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Working out the geometry of the swing arms & crank arms took a lot of time to get the loading frame to line up with the train unit and swing up 90 degs. to the discharge point and tip the balls..
Occasionally an errant ball hangs up on the inside of the ball hopper due to a sight lip caused by the edging tiles.

Synchronisation:

The worm gear box with 40T gear = 40:1 ratio. The train reverser needed modifying to be the same 40:1 ratio

Standard reverser is 4 lobe with a 24T / Worm gear = 24:1 ratio. 

40:1 achieved by using a 12T / 20T gears. (20 x 24) / 12 with a single trip lobe = 40:1

This meant altering gearing for the train reverser but still keep the blocking ratchet arm holding the 24T gear stationary to allow train to depart.

See image of gearing arrangement.

The gear axles at A & C or not connected.
An easy way to adjust timing synchronisation was required and this was achieved by using a Blue clutch gear and a driving ring.

The drive is disconnected manually using this clutch and the trip rotor is adjusted by the timing adjustment knob.

Drive to the 40T gear box is by 1:1 gearing using a combination of 12T double bevel gears, 16T spur gears and knob gears.
The new LEGO Connector Beam 1 x 3 x 3 (39793) part are ideal for arranging gears at 90 degs. with plenty of mounting holes.

Video
New unloader model is paired with my High Capacity Loader Module. Train unit uses L motor. Using an M motor the module will run much slower.

 

Edited June 21, 2020 by Doug72