TQ-HPR50 e-Bike Motor - Inside Explained

The TQ-HPR50 is used on many light weight EMTBs including Trek Fuel EXe

After seeing various photos and videos of TQ-HPR50 drive system I got curious about how it all went together so I created a 3D CAD model from those images.

Of course TQ have an excellent animation showing the internals so that was my starting point but to get enough detail I had to trawl the internet to find at lot more images.

MINOR CORRECTION
The small cable connects to the wheel speed sensor. The large cable carries battery power and the connection to the devices.

[robbief]

Very impressive. With that level of skill and detail, you must be a real asset to have in the team....

[gsportgeorge]

Holy-cow this is a hell of a piece of work putting this video together. Thanks for sharing!

[f.sh]

Last month I ride one of the Trek bike with TQ motor. It was a very new and good experience. This engine feels very natural during the ride.

[AndyRRR]

Nice work, Tony! Thankyou for illuminating the world a little more than yesterday!

[streddaz]

Nice bit of reverse engineering. You did well just going from the images of the motor. Sometimes it's hard to model a part even if you have it in your hands.

[xPeterSilie]

Awesome Engineering and great Animation 👍 Thank you for the Hard work

[allenharmon]

JUst found this - thank you for sharing!

[brentgregory]

Awesome video. This motor is a fantastic piece of engineering

[skyguy]

Great work, thanks! Gives me a better idea how the HPR transmission works.

[pigi_experiment]

Thank you for the video. Your video make me really appreciate the beautiful designed of the motor.

[rjahn]

I have one of these on my Trek Fuel EXE, over 300 miles. It's quiet and smooth no issues.

[sstedman]

goodness gracious, this is some impressive reverse engineering

[benoitgilbert]

@Tony, I currently have a TQ motor that I plan to disassemble. I could correct a few dimensions and parts if you are willing to share the 3D model with me, let me know!

[lipeng]

Does the harmonic pin ring have a flexible pulley?

[enzojunqueira]

please share this cad files! impressive details!

[benroberts]

Hi Tony, do you know anything about replacing the bearings inside the drive unit?
Also how long do you think the bearings would to last before having to have the unit sent off?
Many thanks for the great video. 👍

[sklivello]

Can we create something like this but with sun gear reduction? More simple, more reliable, less expensive?

[mprotec]

wow! you must have spent days.... good job mate! ps. care to share the file?? lol

[catesolarcatamaran]

Rovonte drive is the future, steeples gear and assist in one unit.

[t]

Can this motor be hacked to exceed the 28 mph limit?