Motor Mount Question

[Ohmy]

Hey everyone.

New here on the forum. I’m looking a motor mount for the motor kit from qs motor shown down below (no hyperlink) for a mini bike I’m trying to build. Where could I get one for it? I’ve been searching online for a bit and couldn’t find anything that met the specs I’m looking for. Vendor also sent me this diagram of the motor.

Any help would be appreciated. Thank you.

QS138 4000W V3 Mid-Drive Motor Controller Kits​

 

[Chalo]

If you can build a minibike, you can make a motor mount. The dimensions are in the drawing.

 

[Ohmy]

If you can build a minibike, you can make a motor mount. The dimensions are in the drawing.

I guess you’re right. I just couldn’t find a suitable mount online. But I’ll try my hand at making my own.

 

[offGridDownUnder]

But I’ll try my hand at making my own.

I made the motor mount for my trike out of 6mm flat plate in 5 pieces + 5mm plate for two small pieces which are then all welded together. I also cut an additional 5 plates that slot into the pieces to hold them securely into (almost) the correct positions. Some quality time with a square and straightedge and a small hammer puts them into alignment before starting a series of tack welds, and then full seam welds.

You can see the motor mount in shiny grey behind the seat of the near trike in this photo. I made early versions from mild steel with slightly thinner webs, and this one is 5083 Al with slightly broader webs, and less than half the weight.

Depending on your situation, it may even make sense to just make the plates involved, without bothering about much accuracy, and then assemble and weld them into place in the shop, as long as you can position and angle the motor accurately.

Note that laser cutting introduces heat and warps the plates. Water cutting appears not to cause that problem.

 

[Ohmy]

I made the motor mount for my trike out of 6mm flat plate in 5 pieces + 5mm plate for two small pieces which are then all welded together. I also cut an additional 5 plates that slot into the pieces to hold them securely into (almost) the correct positions. Some quality time with a square and straightedge and a small hammer puts them into alignment before starting a series of tack welds, and then full seam welds.

You can see the motor mount in shiny grey behind the seat of the near trike in this photo. I made early versions from mild steel with slightly thinner webs, and this one is 5083 Al with slightly broader webs, and less than half the weight.

Depending on your situation, it may even make sense to just make the plates involved, without bothering about much accuracy, and then assemble and weld them into place in the shop, as long as you can position and angle the motor accurately.

Note that laser cutting introduces heat and warps the plates. Water cutting appears not to cause that problem.

View attachment 371505

That looks fantastic. Thanks for the feedback.
I don’t have the space nor the money to procure the necessary tools to do what you’ve done, also I don’t know how to weld. Do you think could get away with bending sheet metal to suit my needs for a mount?

 

[offGridDownUnder]

I don’t know how to weld

Another option is to find someone that will for you. I did.

I can imagine a design that can be formed by bending. You then must fasten pieces in place. But it's all doable, even if the first version is for learning, as was mine.