Hi,d8veh wrote:I have the Xiongda 2-speed motor with internal gearbox. This is to me the most exciting thing since I've been involved with hub-motors. No fancy marketing BS. The technology works and could be adapted to any hub-motor. It's only a 15amp controller, but it can climb steep hills without pedalling. The internal gear-changing is fully automatic. It's just amazing. It even works with a 160mm disk. I hope they make a 500w version.
To summarise, it works perfectly, doing everything that I had hoped. I'd be happy to use it as my only motor (at 44v). I'm now going to put it on my main bike to see how it gets on long-term. That'll be with a 36v battery. The only negative point is that it does make a it of mechanical noise - not like the normal geared motor noise.
The cells are rated conservatively by GM at 7.8C, Yabert's tests of Volt packs on the DiyEv car forum suggest a higher C rate, 15+ C!.
$1,400 plus $360 freight. Still over $1k less than new lead!
The utility model discloses a double speed hub motor which comprises a main shaft, a hub outer shell and a motor. The motor comprises a stator and a rotor, wherein the rotor is connected with an identical-direction identical-speed transmission chain which is connected with the hub outer shell through a clutch. The clutch comprises a clutch outer ring, a clutch seat, a big inner gear ring, and a small inner gear ring, wherein the identical-direction identical-speed transmission chain drives the big inner gear ring and the small inner gear ring respectively according to big transmission ratio and small transmission ratio. The small inner gear ring is located inside the clutch outer ring, the clutch seat is arranged between the clutch outer ring and the small inner gear ring and is fixed with the hub outer shell, and the big inner gear ring is fixed with the clutch outer ring. The inner wall and the outer wall of the clutch seat are both uniformly provided with a plurality of in-built balls along the circumferential direction and wedge-shaped grooves where the balls are stuck in the same direction, and further provided with ball modified gears in one-to-one correspondence to the balls in the wedge-shaped grooves of the outer wall of the clutch seat. Each ball modified gear comprises a push rod jacking one ball to a wide portion of one wedge-shaped groove and an electrical execution mechanism used for driving the push rod to move. The double speed hub motor is simple in structure, and speed variation can be completed without the need of forward rotating and reverse rotating of the motor.
Yes, I'll do that if I can get it apart. I think it dismantles like a Q100. I have a lot on my plate already this week, and then I'm going to the Shanghai show, so it'll be about three weeks before I can do it.spinningmagnets wrote:Tried my hand at removing a watermark:
d8veh, is there anything I could do for you...to get you to pull your motor apart and take pics, plus measurements? I think we will be hearing quite a bit about this motor soon. I agree about wishing for a larger motor, perhaps 8-inches diameter...
Good question. I tried with a worn out 5aH 6S pack first. It was sagging to about 42v most of the time, and performance was still adequate for me. In my main bike, I have a nice light 20aH 36v battery, which is useful for the extra range and won't sag much at 15 amps, so I'll see if it gives enough power. I might solder the shunt for a bit more torque. If it's not enough, I have about 15aH of new 12S hard-packs to try.MitchJi wrote: Hi,
If it's so much nicer at 44V, why are you going run it long-term on 36V?
The manufacturer's website is: http://www.xiongdamotor.cn/en/index.html. For sales information contact firstname.lastname@example.org.Gregory wrote:Cool.
Who sells them and how much do they cost?
Well..... you may be right, D8veMiles wrote:Not according to the patent info I posted.....d8veh wrote:I'm still sure that it changes gear by changing rotation direction.
The utility model discloses an electric vehicle double speed motor which comprises a motor, a shaft, a bearing, a stator and a rotor. Rotor output is respectively in transmission connection with a forward transmission chain and a reverse transmission chain. The forward transmission piece of the output end of the forward transmission chain and the reverse transmission piece of the output end of the reverse transmission chain are in transmission connection with an output transmission piece through a clutch. The electric vehicle double speed motor is characterized in that the clutch comprises an output gear, a reverse clutch seat, a forward clutch seat and an inner gear ring, wherein the inner wall of the reverse clutch seat is provided with grooves which are uniformly distributed along the circumferential direction, the inner side of each groove is provided with a roller, the grooves are ladder-shaped, the outer wall of the reverse clutch seat is provided with check blocks which are uniformly distributed along the circumferential direction, the check blocks are located in notches of the inner wall of the forward clutch seat, the notches and the check blocks together constitute an attached idle running mechanism, the outer wall of the forward clutch seat is provided with wedge-shaped notches along the tangential direction, rollers are arranged in the wedge-shaped notches, one end of each roller is provided with a poking block capable of poking the roller, a protrusion capable of poking the poking block is arranged between each two check blocks of the reverse clutch seat, and the protrusions abuts against the poking blocks. The electric vehicle double speed motor has the advantages of being simple in structure, few in used parts and components, stable in operation, low in manufacturing cost, convenient to install, and low in noise.