Gears can be replaced by rings. This allows the American Engineer Jack Schorsch, who soon will be awarded a PhD at the TU Delft for exoskeleton project. However, for the time being to that skeleton is him not to.
First he wants to with the start up IMSystems the robot industry upside down. With rings instead of gears does a robot more than one and a half times as fast, he figured out. “Or you maintains the speed and reduces the robot weight by 10%.”
Take the classic part: three gears at a glance, enclosed by a large wheel with teeth
Running the middle wheel clockwise, then turning the wheels on either side against the clock in, and with it the large wheel around it.
This can also without teeth, via friction, provided that the rings firmly enough to be pressed against each other. How? “By the large, envelope ring slightly too tight to do” said Schorsch.
Schorsch using instant no massive drives. If you press against each other, there is great chance slip, because the discs do not deform enough; the contact surface is small. Its rings are bright springy, lubricates the contact surface a little bit. “That increases the friction force significantly.”
Stopping wheel gear mechanism
One of the advantages is the high accuracy: stop is stop. In Gears there is clearance between the teeth, making the whole thing after being interrupted slightly by running. That’s good news for the precision industry. “The accuracy has an order size of 1/3600°”
In addition, the rings smaller devices. The current tooth wheels have a size of several centimeters. Smaller is not because they are than the required draaimomentenniet treaties and the teeth break. The rings have to a millimeter enough. “Add to this that they are hollow. So much mass lost.” Rings that are the same size as gears deliver a more than three times the size of torque.
Pilot project is under execution
Schorsch had the idea of the rings through his work at an American Rehabilitation Clinic. There he discovered that little patients cannot control a kunstarm, because the prosthetics to be large, inter alia through the gears. When the time is right, would enable another company to Schorsch smaller and lighter prosthetics.
Soon pilot project with a party in the robot industry will begin. Schorsch may tell you anything. “But the applications go far beyond the robot industry. Think of windmills, cars, spacecraft and the current exoskeletons.”