Where to mount the brakes calipers?

[HunterXHunter]

Hi guys,

I would like to know where can I mount the brakes caliper apart from the upright.

I have designed an upright without the mounting point for the brakes calipers, because my team mates suggested mounting it on the hub would be better. Now they changed their mind and I am suppose to change my design to account for the brakes caliper. I have done so much work in term of FEA and iteration, that i don't wish to redo them again.

Some member suggested we can use the hub , as the mounting points. It is possible to have a stationary hub somehow?

Thank you in advance for your help http://fsae.com/groupee_common/emoticons/icon_smile.gif

[NickFavazzo]

single inboard brake rotor for the rear

I don't think you can get out of the forces going through your part. More work will be required regardless to make the part safe to handle the brake loads.

Part of working within a team though is communication, clarity and component integration. Not thinking about what stops the car or how that system is going to fit was a big oversight.

[MCoach]

It is a common problem to struggle with component or even system integration...


Which is why some teams end up with things like an ECU mounted lower than the chassis and mounted to a fuel tank. I speak from experience here. Please, take care in making sure everything is on the car.

The upright is relatively easy to load brake forces into. If it is steel, weld some tabs on to it to adjust. If it is aluminum, create the required extension for the compressive loads and a tab for the tension loading of the caliper.

[HunterXHunter]

Thank you for your input http://fsae.com/groupee_common/emoticons/icon_smile.gif
@Nick : I think that's a good idea. I will suggest that to my team. Thank you.
And yeah I have taken account braking force resultant at the UBJ and the LBJ of the suspension mounting points.
Initially, I was insistent on having the brakes calipers on the upright, as I have done some literature review and noticed the upright usually have mounting points for the brakes caliper. I designed some initial concepts with the caliper mounting points, but then my team mates, strongly suggested that the mounting points should be on the hub instead. So , I removed them http://fsae.com/groupee_common/emoticons/icon_frown.gif. They are more knowledgeable about cars than me, so I assumed they are correct.

But I agree with you.


@MCoach: I'm glad you mentioned Steel. I chose steel for its high stiffness, high hardness, high yield strength, higher ductility/elongation, higher fatigue strength, lower CO2 footprint, and lower embodied energy. The only downside is the weight, which is about 3 times that of aluminium.

Thank you both http://fsae.com/groupee_common/emoticons/icon_smile.gif

[MCoach]

Awesome, steel.

This is a small enough resultant force from the brake caliper that just locating it where you are happy with it first and then building tabs out to meet it. Take care to check which side it is mounted on.

Depending on whether the caliper is mounted on the back side or front side of the upright it will put your UBJ in compression and LBJ in tension or vice versa. Figure out which would be a best load case for your current design to modify. http://fsae.com/groupee_common/emoticons/icon_smile.gif

Actually, is this a front or rear of the car design that is in issue?

[HunterXHunter]

The front of the car http://fsae.com/groupee_common/emoticons/icon_smile.gif.
Thanks for your valuable information...I will change the directions of the applied forces (cornering and braking) and observe if any significant changes in terms of the resultant von Mises stress, and deformation on the upright (using FEA).

[Sormaz]

Maybe i'm missing something....

you guys do realize that certain parts on the car must move in order for it to work right?

hopefully you haven't also decided to route your electronics harness through the speedholes on your sprocket

[Z]

I keep checking, and I'm pretty sure we are all still in March. Not April the First for another week...

I'm totally baffled??? http://fsae.com/groupee_common/emoticons/icon_confused.gif http://fsae.com/groupee_common/emoticons/icon_confused.gif http://fsae.com/groupee_common/emoticons/icon_confused.gif

Z

[HunterXHunter]

@sormaz,
I did say the hub and the spindle will be rotating from what I understood. But I succumbed to their opinions, a things I forever regret, and will not be repeated in the future.

@Z lol...that makes it the two of us.

[Paul Achard]

HunterXHunter, what do you mean by "hub"? In my lingo hub = spindle, which is a rotating part...

[HunterXHunter]

@ Paul, I mean by the hub this component http://image.made-in-china.com/2f0j00fCRtncpzVDqY/Wheel-Hub-Unit-513137-.jpg .

[Claude Rouelle]

"..... succumbed to their opinions....."

HunterXHunter,

What I read is "it is not my fault, it is my other team members fault. I was not able to defend my point of view and I now I use this forum as a shoulder to cry"

Get a life. Grow up. Stop being a victim.

In this world there are 2 categories of people: the ones making victories and the ones making excuses; choose the category you want to belong to.

Com on.... you can do better. You deserve better and the people around you deserve better.

[HunterXHunter]

@Clause: Thanks for your kind comment, but I don't believe I asked you for lesson in life. "get a life", what do you know about me to make such statement?...That speaks volumes about you.

What I have mentioned is what exactly happened, I came here looking for suggestions of alternative mounting points of the brake's calipers , other than the upright. Some useful suggestions were shared by some helpful members.

[NickFavazzo]

I'm with Claude on this one. My initial thoughts were that you are just having a whinge about how it was not your fault and that it was the other team members fault, really it was both, you should have thought about it, other engineers should have thought about it, other team mates should have seen the oversight and commented. The area manager should have asked the question.

Shit happens.

Time to get on with it and find a solution.

[Claude Rouelle]

HunterXhunter,

You did not ask me a lesson in life but I gave it to you. Take as what it is; a gift.

I don't know you but you introduced your self as a victim. Nobody wins in this forum when you introduce yourself that way and I think somebody had to tell you. I did.