TOOL BIT HOLDER FOR POWER TOOL

摘要

A tool bit holder releasably retains a shank of a tool bit having three flat faces arranged generally in a triangle and an annular groove. A holder body has a shank-receiving bore bounded by an inner wall with three flat inner wall surfaces arranged generally in a triangle. A plurality of windows, defined in the inner wall, extend radially outward from the bore. A plurality of retaining members is received in the plurality of windows and extends at least partially through the window into the bore. An elastic band around the retaining members biases the retaining members radially inward toward the bore. The flat wall portions are configured to engage the flat faces of the tool bit to non-rotationally retain the shank in the tool holder and the retaining members are configured to engage the annular groove to axially retain the tool bit in the tool holder.

主权项

1. A tool bit holder for releasably retaining a shank of a tool bit having three flat faces arranged generally in a triangle and an annular groove, the tool bit holder comprising:
a holder body that includes a shank-receiving bore bounded by an inner wall having three flat inner wall surfaces arranged generally in a triangle; a plurality of windows defined in the inner wall, each window extending radially outward from the bore; a plurality of retaining members, each retaining member received in one of the plurality of windows and extending at least partially through the window into the bore; and an elastic band disposed around the retaining members and biasing the retaining members radially inward toward the bore, wherein the flat wall portions of the bore are configured to engage the flat faces of the tool bit to non-rotationally retain the shank of the tool bit in the tool holder and the retaining members are configured to engage the annular groove of the tool bit to axially retain the tool bit in the tool holder.