RC Truck and Construction  

Go Back   RC Truck and Construction > RC Truck's Ag and Industrial Equipment and Buildings > Construction Equipment

Construction Equipment If it digs, pushes, hauls dirt "off road" post it here.


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #11  
Old 11-23-2015, 05:06 PM
SteinHDan SteinHDan is offline
Green Horn
 
Join Date: Sep 2015
Location: Oslo, Norway
Posts: 188
SteinHDan is on a distinguished road
Default Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Mounting the boom

I'm going to try to use electric gear motors first. If that doesn't work out, I'll make the excavator hydraulic instead.

I'm using some quite powerful gear motors for all of the joints.
Ebay link:
- http://www.ebay.com/itm/221515025957

These are 10 rpm 320 kg / cm stall torque motors. Two in parallel should produce 640 kg / cm.




The two motors mount to the upper structure with 8 M5 countersunk bolts.






The boom itself is constructed with two milled 6mm aluminum profiles. At the end, another gear motor is mounted with another 8 M5 countersunk bolts.

I bought the hubs on aliexpress:
- http://www.aliexpress.com/item/10mm-...922964248.html












I'm using gas springs where the hydraulic cylinders would normally go.
The gas springs functions in many interesting ways in this configuration:
- Equalize the weight of the arm, so that the gear motor only have to lift the payload
- Dampen sudden movements and protect the gear motor
- A sound that is similar to a hydraulic cylinder
- Visually resembles a hydraulic cylinder.




Item links:
- Gas springs: http://www.ebay.com/itm/181788326018
- Clevis: http://www.ebay.com/itm/161559757356
- Rod eyelet: http://www.ebay.com/itm/5mm-Female-T...-/181888111312




Reply With Quote
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:07 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.