Dual Mode Spring Motor Rolling Chassis

A dual mode (power and coast) spring motor rolling chassis.

Toys

Creative Commons Attribution Noncommercial Share Alike

Commercial use is not allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.

Learn more or download attribution tags

Attribution

https://www.youmagine.com/designs/spring-motor-rolling-chassis-version-2

Description

Despite having identical gear ratios to, and smaller drive wheels than, my previous "rolling chassis" designs ("Spring Motor Rolling Chassis Version 2" here: https://www.youmagine.com/designs/spring-motor-rolling-chassis-version-2, and "PLA Spring Motor, Rolling Chassis" here: http://www.thingiverse.com/thing:430050), the Dual Mode Spring Motor Rolling Chassis out distances both thanks to it's dual mode operation.

The first mode is identical to the previous two rolling chassis designs, using a PLA spring to power the chassis. The second mode is new, "true coast". The previous two designs depended on the pawl releasing from the pawl gear to "coast", which, due to friction, limited the distance these vehicles would coast. "True coast" utilizes a floating pinion gear (I published a floating pinion demonstrator here: http://www.thingiverse.com/thing:2025927). Under spring power, the rear axle is connected to the spring motor via the floating pinion gear and spring motor torque. When the spring energy is depleted, the floating pinion is disconnected from the rear axle by the rear axle gear itself, allowing the rear axle to free spin and the chassis to truly coast.

Video of the prototype is here:

.

Video of a comparison between the "Spring Motor Rolling Chassis Version 2" and the "Dual Mode Spring Motor Rolling Chassis" is here:

.

You will need to purchase four AS 568 #213 o-rings (1 3/16" O.D., 15/16" I.D., 1/8" diameter) and eight AS 568 #223 o-rings (1 7/8" O.D., 1 5/8" I.D., 1/8" diameter), which are available on line, and at plumbing supply / box stores.

Designed using Fusion 360, sliced using Cura 2.3.1, and printed in PLA on an Ultimaker 2+ Extended and an Ultimaker 3 Extended.

Materials and methods

Sliced using Cura 2.3.1, printed in PLA on an Ultimaker 2+ Extended and an Ultimaker 3 Extended at .1mm vertical resolution.

Print "Knob and Axle.stl", "Chassis Left.stl", "Chassis Right.stl" and "Spring.stl" with 100% infill, the remaining components with 50% infill.

Print two each of "Wheel Front.stl" and "Wheel Rear.stl", print one each of the remaining parts.

Study "Assembly.stl", carefully noting the locations and positions of the various components as assembly proceeds.

1) Press "Gear Axle Rear.stl" onto "Axle Rear.stl".

2) Press "Gear Idler Small.stl" onto "Axle Gear Idler Small.stl".

3) Slide "Knob and Axle.stl" into "Chassis Right.stl", then press "Spring.stl" and "Pawl.stl" onto "Knob and Axle.stl".

4) Slide "Gear Pawl.stl" onto "Knob and Axle.stl".

5) Slide "Gear Spur.stl" onto the axle on "Chassis Right.stl".

6) Place the idler assembly ("Gear Idler Small.stl" and "Axle Gear Idler Small.stl") and rear axle assembly ("Axle Rear.stl" and "Gear Axle Rear.stl") into position in "Chassis Right.stl".

7) Press "Chassis Left.stl" onto "Chassis Right.stl".

8) Place the o-rings on the wheels.

9) Press one each of "Wheel Rear.stl" onto each end "Axle Rear.stl".

10) Position "Axle Front.stl" into the chassis assembly, the press one each of "Wheel Front.stl" onto each end of "Axle Front.stl".

Hope you like it!

Documents

Issues

Issues are used to track todos, bugs or requests. To get started, you could create an issue.

Comments

1539e4e451f45b87be1e0f528c60a7e2?default=blank&size=40Andrea Stefanello added this to the Da Stampare collection ago
C7cadffca65711c1a5aa4208c0cbf292?default=blank&size=40Martti Ojanen added this to the Toys collection ago
914541c53806d8b49e1a85adcbaedd04?default=blank&size=40CVK added this to the Toys collection ago
E4f706714d206834050b3e5682d7256e?default=blank&size=40ac8gt added this to the Toys collection ago
57cea7eb370cdf7f3ca6d6721cb111bd?default=blank&size=40Juan Ferguson added this to the para imprimir collection ago
47af593ad1b53e3dfa48937402de2f83?default=blank&size=40mroreo123 added this to the Toys collection ago
C56bb8a7a01df4e38fc1e58135de6d23?default=blank&size=40JustKrys added this to the Things to Print collection ago
Mini lora and iGreg Zumwalt published this design ago