Patent ID: 9206879
Filing Date: 2015-12-08
Classification: F16F,Y10T

Abstract:
1. A balancer capable of being attached to and rotating together with a rotatable body about a rotation axis of the rotatable body, the balancer comprising: a plurality of weights having the same mass and shape; and a weight holder having a plurality of storage chambers drilled therein, the storage chambers being capable of housing the weights, respectively, in a manner such that the weights each freely oscillate in arbitrary directions, wherein each of the storage chambers comprises a position maintaining plane and a guiding plane facing each other in parallel, and a receiving surface joining the position maintaining plane and the guiding plane, a second pressing surface and a third pressing surface facing each other in parallel, and each joining the leaning plane and the first pressing surface, and two curved end surfaces each joining both end sides of each of the leaning plane, the first pressing surface, the second pressing surface, and the third pressing surface,