Patent ID: 11897039
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tapping head, comprising:
a. a base with an upper flange, a cylindrical body, an upper neck bore and a lower cylindrical cavity, formed on said cylindrical body are external threads;
b. a drive coupler axially aligned with said base, said drive coupler includes a lower cylindrical body and an upper neck, said upper neck being inserted into said upper neck bore formed on said base and said lower cylindrical body being inserted into said lower cylindrical cavity formed on said base;
c. a drive sleeve coaxially aligned with said base and said drive coupler, said drive sleeve includes a center bore with a plurality of longitudinally aligned internal splines formed thereon, said center bore being inserted around said lower cylindrical body on said drive coupler;
d. a clutch pack located inside said lower cylindrical cavity formed on said base, said clutch pack being placed around said drive sleeve;
e. a pressure ring axially aligned with and extending around said drive sleeve, said pressure ring includes a flat top surface configured to press against said clutch pack, said pressure ring includes a plurality of downward extending clutch springs;
f. a clutch cover with a center bore, a top opening, and a lower opening, formed inside said center bore are internal threads configured to mesh with said external threads on said base, said clutch cover includes a flange surface configured to press against said clutch springs when said clutch cover is axially aligned and attached to said base;
g. a driver configured to slide axially into said center bore formed in said clutch cover and into said center bore formed in said drive sleeve, said driver includes a plurality of external splines configured to mesh with said internal splines in said drive sleeve, said driver being an elongated structure with tapered sidewalls that extend below said clutch cover, said sidewalls surrounding a lower cavity configured to receive the shaft of a tap, formed on said sidewall are external threads;
h. a plurality of thrust springs extending between said drive coupler and said driver;
i. a retainer spring assembly connected at one end to said drive coupler and connected at an opposite end to said driver, said retainer spring assembly configured to apply an upward biasing force to said driver;
j. a drive cover extending over said driver and attaching to said clutch cover; and
k. a lock nut configured to attach to said external threads on said driver to selectively attach a tap to said driver.