Portable power tool with grease lubricated angle drive
First Claim
1. A portable power tool comprising:
- a housing;
a rotation motor;
a drive pinion connected to said motor;
an output spindle disposed at an angle to said drive pinion; and
a bevel gear attached to said output spindle, said bevel gear and said drive pinion together forming an angle drive; and
an output spindle arresting device comprising a number of recesses in said bevel gear, and a latch pawl movably supported in said housing and manually shiftable from an inactive position to an activate position to engage one of said recesses to arrest said bevel gear and said output spindle against rotation;
wherein said housing comprises an angle drive chamber enclosing said angle drive and being partly filled with lubricating grease; and
wherein a grease displacing element is connected to said latch pawl and arranged to re-locate grease from one part of said angle drive chamber to another part of said angle drive chamber when said latch pawl is shifted from said inactive position to said activated position.
1 Assignment
0 Petitions
Accused Products
Abstract
A portable power tool is provided which includes a housing having an angle drive chamber, a rotation motor, an output spindle, and a grease lubricated angle drive that is located in the angle drive chamber and that includes a drive pinion connected to the motor and a bevel gear connected to the output spindle. The portable power tool also includes an output spindle arresting device which includes a number of recesses in the bevel gear and a latch pawl movably supported in the housing for movement between an inactive position and an active position to engage the recesses in the bevel gear, wherein a grease moving element is connected to the latch pawl to be moved and displace grease from one part of the angle drive chamber to another as the latch pawl is shifted from its inactive position to its active position.
10 Citations
6 Claims
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1. A portable power tool comprising:
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a housing;
a rotation motor;
a drive pinion connected to said motor;
an output spindle disposed at an angle to said drive pinion; and
a bevel gear attached to said output spindle, said bevel gear and said drive pinion together forming an angle drive; and
an output spindle arresting device comprising a number of recesses in said bevel gear, and a latch pawl movably supported in said housing and manually shiftable from an inactive position to an activate position to engage one of said recesses to arrest said bevel gear and said output spindle against rotation;
wherein said housing comprises an angle drive chamber enclosing said angle drive and being partly filled with lubricating grease; and
wherein a grease displacing element is connected to said latch pawl and arranged to re-locate grease from one part of said angle drive chamber to another part of said angle drive chamber when said latch pawl is shifted from said inactive position to said activated position. - View Dependent Claims (2)
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3. A portable power tool comprising:
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a housing;
a rotation motor;
a drive pinion connected to said motor;
an output spindle disposed at an angle to said drive pinion; and
a bevel gear attached to said output spindle, said bevel gear and said drive pinion together forming an angle drive; and
an output spindle arresting device comprising a number of recesses in said bevel gear, and a latch pawl movably supported in said housing and manually shiftable from an inactive position to an activate position to engage one of said recesses to arrest said bevel gear and said output spindle against rotation;
wherein said housing comprises an angle drive chamber enclosing said angle drive and being partly filled with lubricating grease;
Wherein a grease displacing element is connected to said latch pawl and arranged to re-locate grease from one part of said angle drive chamber to another part of said angle drive chamber when said latch pawl is shifted from said inactive position to said activated position; and
wherein said grease displacing element comprises a sheet metal element rigidly attached to said latch pawl. - View Dependent Claims (4)
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5. A portable power tool comprising:
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a housing;
a rotation motor;
a drive pinion connected to said motor;
an output spindle disposed at an angle to said drive pinion; and
a bevel gear attached to said output spindle, said bevel gear and said drive pinion together forming an angle drive; and
an output spindle arresting device comprising a number of recesses in said bevel gear, and a latch pawl movably supported in said housing and manually shiftable from an inactive position to an activate position to engage one of said recesses to arrest said bevel gear and said output spindle against rotation;
wherein said housing comprises an angle drive chamber enclosing said angle drive and being partly filled with lubricating grease;
wherein a grease displacing element is connected to said latch pawl and arranged to re-locate grease from one part of said angle drive chamber to another part of said angle drive chamber when said latch pawl is shifted from said inactive position to said activated position; and
wherein said recesses in said bevel gear comprise a number of bores arranged in a circular configuration concentric with a rotation axis of said output spindle.
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6. A portable power tool comprising:
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a housing;
a rotation motor;
a drive pinion connected to said motor;
an output spindle disposed at an angle to said drive pinion; and
a bevel gear attached to said output spindle, said bevel gear and said drive pinion together forming an angle drive; and
an output spindle arresting device comprising a number of recesses in said bevel gear, and a latch pawl movably supported in said housing and manually shiftable from an inactive position to an activate position to engage one of said recesses to arrest said bevel gear and said output spindle against rotation;
wherein said housing comprises an angle drive chamber enclosing said angle drive and being partly filled with lubricating grease;
wherein a grease displacing element is connected to said latch pawl and arranged to re-locate grease from one part of said angle drive chamber to another part of said angle drive chamber when said latch pawl is shifted from said inactive position to said activated position;
wherein said latch pawl extends from outside said housing into said angle drive chamber and is formed with a press button at an outer end, and said grease displacing element is movable by said latch pawl along an inner wall of said angle drive chamber so as to scrape grease along said inner wall toward said bevel gear; and
wherein said recesses in said bevel gear comprise a number of bores arranged in a circular configuration concentric with a rotation axis of said output spindle.
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Specification