Reciprocating saw
A reciprocating saw includes a housing assembly and a motor positioned substantially within the housing assembly. The motor includes a pinion. A drive mechanism is positioned substantially within the housing assembly and includes a gear driven by the pinion, a spindle, and a connecting rod to transmit rotation of the gear into reciprocation of the spindle. A bushing is positioned substantially within the housing assembly about at least a portion of the spindle. The bushing is pivotable relative to the housing assembly to accommodate non-linear rocking motion of the spindle. A seal surrounds a portion of the bushing and includes a first lip extending radially from the bushing and a second lip spaced apart from the first lip and extending radially from the bushing. The second lip is movable relative to the first lip. Both the first lip and the second lip continuously engage the housing assembly when the bushing pivots relative to the housing assembly.
1. A reciprocating saw comprising:
a housing assembly;
a motor positioned substantially within the housing assembly, the motor including a pinion;
a drive mechanism positioned substantially within the housing assembly, the drive mechanism including a gear coupled to and driven by the pinion, a spindle reciprocatable relative to the housing assembly, and a connecting rod extending between the gear and the spindle to transmit rotation of the gear into reciprocation of the spindle;
a bushing positioned substantially within the housing assembly about at least a portion of the spindle, the bushing pivotable relative to the housing assembly to accommodate non-linear rocking motion of the spindle; and
a seal surrounding a portion of the bushing, the seal including a first lip extending radially from the bushing and a second lip spaced apart from the first lip and extending radially from the bushing, the second lip movable relative to the first lip, both the first lip and the second lip continuously engaging the housing assembly when the bushing pivots relative to the housing assembly.
2. The reciprocating saw of claim 1 , wherein the seal further includes a cross-member connecting the first lip and the second lip such that the seal is integrally formed as a single piece.
3. The reciprocating saw of claim 1 , wherein the bushing is pivotally coupled to the housing assembly by a pin, and wherein the pin defines a pivot axis of the bushing.
4. The reciprocating saw of claim 3 , wherein the spindle defines a longitudinal axis, and wherein the pivot axis of the bushing is located generally between the connecting rod and the seal along the longitudinal axis.
5. The reciprocating saw of claim 3 , wherein the motor defines a motor axis about which the pinion rotates, and wherein the pivot axis is offset from the motor axis.
6. The reciprocating saw of claim 1 , wherein at least a portion of the seal is composed of an elastomeric material.
7. The reciprocating saw of claim 1 , wherein the first lip and the second lip of the seal are received in a groove formed in the housing assembly.
8. The reciprocating saw of claim 7 , wherein an axial face of the first lip and an axial face of the second lip both engage an inner surface of the housing assembly that defines the groove.