Haynes Forums

Haynes Forums (http://www.haynes.co.uk/forums/index.php)
-   Running gear (http://www.haynes.co.uk/forums/forumdisplay.php?f=5)
-   -   Steering rack brackets (http://www.haynes.co.uk/forums/showthread.php?t=13086)

TheArf 29th December 2013 09:31 PM

Steering rack brackets
 
Good evening Gents,

today I have made a bit of progress on the suspension and whilst working on the front end my mind wandered, as it does when you get to my age, doesn't it Ayjay.
It wandered to the world of the steering rack bracket, and how flimsy it looks so am thinking of coming up with a different idea.

Now to my question, is there an optimum hight from the bottom face of the chassis to the centre of the rack, I couldn't find anything in the book and I have left it over in the workshop so won't get to it until tomorrow.

kind regards

Arfon

alga 29th December 2013 10:22 PM

95 mm, see drawing on page 75.

TheArf 29th December 2013 10:26 PM

Thanks Alga

jason 82 30th December 2013 09:35 AM

Any reason why box section can't be used ? As long as the outside diameter is the same, surely this will strengthen up the front rack bracket considerably ? I know that it will take longer to fabricate, but as long as the wall in the box is sufficient, it should work champion.

TSM Locost 30th December 2013 10:25 AM

Steering rack
 
Have you seen this, Steering Rack Support Revised Drawing in book amendments.
http://www.haynesroadster.pwp.blueyo...ng_support.pdf

Fold a 3mm steel sheet to the same angle as drawing and weld front and rear.

TheArf 30th December 2013 02:26 PM

I was thinking of using Box section and having it in the same orientation as Janne's and either drill and tap some holes or mill some slots to bolt through

Arfon

flyerncle 30th December 2013 08:12 PM

Two 5mm plates with bolt holes under the rack mounting fixes the flimsy aspect of it.

alga 30th December 2013 11:45 PM

Quote:

Originally Posted by jason 82 (Post 95087)
Any reason why box section can't be used ? As long as the outside diameter is the same, surely this will strengthen up the front rack bracket considerably ? I know that it will take longer to fabricate, but as long as the wall in the box is sufficient, it should work champion.

You'd have to incorporate crush tubes into the box section. Combine it with slots for adjustment, and it does not sound so easy at all. The alternative is to cut the tubes open and clamp to a single wall of the box section.

An alternative is to fill in the triangular sides, as Mopple has designed in his chassis Solidworks model: http://grabcad.com/library/haynes-roadster-chassis
The drawback of this approach is slightly impeded access to the clamp nuts.
Mopple's design is folded out of a single laser cut piece of 3 mm plate, if I recall correctly.

voucht 31st December 2013 08:20 AM

Hi,

I don't know if someone else here is using Madis (Mopple)'s modified steering rack support design, but I do, so I thought I could share some pictures.


S-rack frame par Voucht71, sur Flickr


2011-10-09_17-40-33 par Voucht71, sur Flickr

I ordered the assembly directly from him (at that time, I paid 13 euros + shipment!), it consists of 4 parts : 2 sides, 1 top (90° bent plate), 1 cross plate.


2011-09-29_15-14-50 par Voucht71, sur Flickr

I'm so glad I am using this revised design, it feels much safer than the book's design.

Here is the page of my blog about the fitting of this part on my chassis, with pictures.
http://vouchtroadster.blogspot.se/20...ring-rack.html

Hope this can help :)

TheArf 31st December 2013 08:54 AM

I am missing something here, why the crush tubes, the slotting is easy just not sure why the crush tubes.

Arfon


All times are GMT +1. The time now is 02:47 PM.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.