The invention discloses a demonstration ball lifting and shunting mechanism for a mechanical rhythm demonstration device, and relates to the field of science and education. The mechanism comprises a back plate, an inner gear ring and a ball guide groove, wherein six supporting gears are installed on the back plate; the six supporting gears are arranged on the same circle; an included angle betweenevery two adjacent supporting gears is equal; the supporting gears are meshed on the inner ring side of the inner gear ring; a ball shifting groove is formed in the outer ring side of the inner gearring; a driving shaft is installed on a back plate at an inner ring of the inner gear ring; a driving gear is installed on the driving shaft; the driving gear is meshed with the inner gear ring; a hand wheel is installed at the end of the driving shaft; the ball guide groove is fixedly installed on the back plate; the ball guide groove is of a semicircular structure; the ball guide groove surrounds the outer ring side of the inner gear ring; a ball outlet is formed in the upper end of the ball guide groove; and a ball inlet is formed in the lower end of the ball guide groove. An operator can realize lifting and shunting of demonstration balls by only rotating the hand wheel, without arranging an additional shunting mechanism, so that the operation is simple.

Demonstration ball lifting and shunting mechanism for mechanical rhythm demonstration device

The utility model relates to a separated double-raceway slewing bearing comprising an inner rotating ring, an upper raceway ring, an upper rolling ball layer, a lower raceway ring, a lower rolling ball layer and a gear ring, wherein a first connecting platform is arranged in the circumferential direction of the outer side wall of the inner rotating ring, and the section of the first connecting platform is of a step-shaped structure; a second connecting platform is arranged in the circumferential direction of the inner side wall of the gear ring; and the first connecting platform and the second connecting platform are superposed with each other and are fixed through bolts. The separated double-raceway slewing bearing is precise and stable in structure, reliable in working, convenient to mount, capable of greatly reducing the cost and lowering the machining difficulty and particularly suitable for application in wind power and construction machine industries.

Liu Guoxiang

Papers

Separated double-raceway slewing bearing