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US 11,931,848 B2Granted
High-speed, low runout spindle assembly
AssigneeZippy Robotics, Inc.
InventorRocco J. Tuccio
Life of this patent
Estimating the term…
Abstract
A high-speed low runout spindle assembly is provided. The spindle assembly includes a friction drive wheel configured to be coupled to an output shaft of a motor. The friction drive wheel is configured and disposed to directly contact a shank of a bit. A set of bearings is configured to contact the shank of the bit. A bit clamp assembly includes a clamp bearing having a central through-hole dimensioned to accept a lower portion of the shank of the bit. The bit clamp assembly is configured to hold the bit in contact with the set of bearings.
Claims17
A spindle assembly, comprising:
- a friction drive wheel configured to be coupled to an output shaft of a motor, the friction drive wheel being configured and disposed to directly contact a shank of a bit;
- a plurality of bearings configured to contact the shank of the bit;
- a bit clamp assembly including a clamp bearing having a central through-hole dimensioned to accept a lower portion of the shank of the bit, the bit clamp assembly being configured to hold the bit in contact with the plurality of bearings;
- and
- a housing enclosing the friction drive wheel and the plurality of bearings, the housing including a first magnet and a second magnet configured to magnetically couple with respective magnets disposed on a top surface of the bit clamp assembly,
- wherein the first magnet and the second magnet are coupled to respective compression springs configured to apply an upward force to securely hold the bit clamp assembly.
3 more elements
A spindle assembly, comprising:
- a friction drive wheel configured to be coupled to an output shaft of a motor, the friction drive wheel being configured and disposed to directly contact a shank of a bit;
- a plurality of bearings configured to contact the shank of the bit;
- and
- a bit clamp assembly including a clamp bearing having a central through-hole dimensioned to accept a lower portion of the shank of the bit, the bit clamp assembly being configured to hold the bit in contact with the plurality of bearings, and the bit clamp assembly being further configured to axially constrain the bit by trapping a ring extending outward from the shank of the bit, the ring being trapped between the clamp bearing and a surface of at least one of the plurality of bearings,
- wherein the ring is a depth ring disposed on the shank of the bit, the depth ring being formed of a material selected from the group consisting of metal and plastic.
2 more elements
Dependencies are inferred from the claim text.