US 6,234,255 B1 · Adjustable stroke for a reciprocating saw

Abstract

An adjustable cutting stroke length is provided by a wobble plate mechanism. A wobble plate mechanism imparts reciprocating linear action to a working end of a reciprocating motorized tool. A drive source is included that has an axially rotatable main drive shaft that is selectively rotatable in one of two opposite directions. The main drive shaft is configured to engage a wobble mechanism that provides the reciprocating linear action to the tool's working end. One of a first stroke and a second stroke is provided to the working end of the tool by the wobble mechanism. When rotation of the main drive shaft occurs in a first direction, the working end is provided with a first stroke. Furthermore, when rotation of the main drive shaft occurs in a second direction, the working end is provided with a second stroke. Elements used for adjusting the stroke length are placed on one axis only.

Claims32

Dependent claims

A tool having a working end with reciprocating linear action comprising:

a drive source having an axially rotatable main drive shaft being selectively rotatable in a first direction and a second direction opposite said first direction;
a wobble mechanism operatively engaged with said main drive shaft and configured for providing said reciprocating linear action to said working end;
said wobble mechanism being configured for providing one of a first stroke and a second stroke to said working end;
said first stroke being provided when said main drive shaft is rotating in said first direction;
and
said second stroke being provided when said main drive shaft is rotated in said second direction, said first stroke being a different length than said second stroke such that the stroke length is varied by changing the rotational direction of said main drive shaft.

3 more elements

A tool having a working end with reciprocating linear action comprising:

a housing;
a motorized drive source having an axially rotatable main drive shaft operatively engaging a gear;
said gear rotatably engaging a wobble plate drive shaft having a first end driven by said drive source through said main drive shaft and a second end angled relative to said first end;
a spacer engaged on said second end of said wobble plate drive shaft;
a bearing secured to said housing configured to engage said spacer;
said bearing rotatingly supporting said second end of said wobble plate drive shaft relative to said housing;
a wobble plate assembly rotatably mounted on said wobble plate drive shaft, said wobble plate assembly having a rotating sleeve with a central axis and a throughbore angled relative to said axis, said throughbore configured for engaging said second end of said wobble plate drive shaft for creating a wobble motion about said central axis;
said wobble motion providing said reciprocating linear action to said working end of said tool;
said wobble plate assembly being configured for providing one of a first stroke and a second stroke to said working end of said tool;
said first stroke being provided when said main drive shaft is rotating in a first direction;
and
said second stroke being provided when said main drive shaft is rotating in a second direction, said first stroke being a different length than said second stroke such that the stroke length is varied by changing the rotational direction of said main drive shaft.

9 more elements

Dependencies are inferred from the claim text.

Adjustable stroke for a reciprocating saw

Life of this patent

Adjustable stroke for a reciprocating saw

Life of this patent

Abstract

Claims32