Dynamic balancing apparatus

• US 3,866,489 A
• Filed: 11/16/1973
• Issued: 02/18/1975
• Est. Priority Date: 11/16/1973
• Status: Expired due to Term

• Current Assignee: Rudolf Johan Kimmelaar
• Original Assignee: Rudolf Johan Kimmelaar
• Inventors: Kimmelaar, Rudolf Johan
• Primary Examiner(s): Scott, Samuel
• Assistant Examiner(s): Shoemaker, F. D.
• Application Number:
  US05/416,689
• Time in Patent Office: 459 Days
• Field of Search: 74/573 51/169 73/458,468,469,470
• US Class Current: 74/570.2
• CPC Class Codes: B24B 41/042 Balancing mechanisms
• CPC Class Codes: G01M 1/36 by adjusting position of masses built-in the body to be tested
• CPC Class Codes: Y10T 74/2111 Plural, movable relative to each other [including ball[s]]

Abstract

A device for balancing rotating bodies such as grinding wheels, by causing the center of gravity of a counterweight to move along a predetermined path relative to the body while the latter is rotating. The path followed by the center of gravity of the counterweight is such that it is caused to continually and repeatedly increase and decrease its radial distance from the axis of rotation as it progresses angularly around the axis. Preferably, provision is made for reversing its direction of movement along the path so that balance may be approached by the shortest route.

Claims

1. A balancing apparatus for a body rotating about a predetermined axis comprising a spindle for supporting said body for rotation about said axis, a casing mounted on said spindle adjacent said body, an internal gear disposed in said casing in fixed, coaxial relationship with said spindle, a carrier journaled in said casing for rotation about the axis of said spindle, a pinion gear journaled in said carrier and meshing with said internal gear, a balancing mass attached to said pinion gear with its center of gravity eccentric to the axis thereof, and selectively operable means for rotating said carrier relative to said spindle thereby causing the center of gravity of said mass to describe a hypocycloidal path in a plane normal to the axis of said spindle.

2. The balancing apparatus of claim 1 wherein said spindle is hollow and receives a rotary drive shaft coaxially disposed therein for rotating said carrier.

3. The balancing apparatus of claim 1 including a reversible electric motor coaxially supported on said spindle for operating said drive shaft in one direction or the other relative to said spindle as the latter is rotating.

4. The balancing apparatus of claim 3 including means for applying a braking potential to said motor whenever the driving potential is removed therefrom.

5. The balancing apparatus of claim 1 including brake means for continuously and yieldable restraining rotation of said carrier relative to said spindle.