Sealing geometry for a mobile power tool
A sealing geometry for a mobile power tool is provided wherein the mobile power tool has a drive unit, wherein the sealing geometry is designed to seal off an interior (IB), containing a lubricant, of the drive unit from an exterior (AB) outside the drive unit. The sealing geometry has a seal that is contactless at least during operation of the drive unit.
1. A sealing geometry for a mobile power tool wherein the mobile power tool has a housing forming a mating surface, and a drive unit, wherein the sealing geometry is designed to seal off an interior (IB), containing a lubricant, of the drive unit from an exterior (AB) outside the drive unit,
the sealing geometry having a seal that is contactless at least during operation of the drive unit, wherein the sealing geometry has a sealing lip sealing against the mating surface arranged at the housing of the mobile power tool.
2. The sealing geometry as claimed in claim 1 , wherein the sealing lip bears against the mating surface of the mobile power tool when the drive unit is at a standstill, in order to seal off the interior (IB) from the exterior (AB).
3. The sealing geometry as claimed in claim 2 , wherein the sealing geometry has a seal carrier on and/or in which the sealing lip is arranged.
4. The sealing geometry of claim 3 , wherein the sealing lip fits in an indentation in the seal carrier.
5. The sealing geometry as claimed in claim 2 , wherein the sealing lip has a V-shaped or an at least substantially V-shaped cross section.
6. The sealing geometry as claimed in claim 1 , wherein the sealing lip is configured such that, during operation of the drive unit, the sealing lip comes away from the mating surface of the mobile power tool or that, during operation of the drive unit, a pressure force of the sealing lip on the mating surface is reduced at least compared with when the drive unit is at a standstill.
7. The sealing geometry as claimed in claim 1 , wherein the sealing geometry is designed to create at least one vortex flow in the lubricant) during operation of the drive unit, said vortex flow improving the sealing action of the sealing geometry.
8. The sealing geometry as claimed in claim 1 , wherein the sealing geometry has a seal carrier having at least one vortex structure for creating the at least one vortex flow.
9. The sealing geometry as claimed in claim 1 , wherein the sealing geometry is designed to have and/or to create a sealing fluid at least during operation of the drive unit.
10. The sealing geometry of claim 9 , wherein the sealing geometry is designed to have and/or create a sealing air at least during operation of the drive unit.
11. The sealing geometry as claimed in claim 1 , wherein the sealing geometry has a lubricant labyrinth seal.
12. The sealing geometry as claimed in claim 1 , wherein the sealing geometry comprises an acrylonitrile butadiene.
13. The sealing geometry as claimed in claim 1 , wherein the sealing geometry comprises a fluorine-containing material.
14. The sealing geometry as claimed in claim 1 , wherein the sealing geometry comprises a water-vapor-resistant material.
15. The sealing geometry as claimed in claim 1 , wherein the sealing geometry comprises a high-temperature-resistant material.
16. The sealing geometry as claimed in claim 1 , wherein the sealing geometry, has a coating.
17. A mobile power tool wherein the mobile power tool has a housing and a drive unit and a sealing geometry, wherein the sealing geometry is designed to seal off an interior (IB), containing a lubricant, of the drive unit from an exterior (AB) outside the drive unit, wherein
the mobile power tool has the sealing geometry according to claim 1 .
18. The mobile power tool as claimed in claim 17 , wherein the lubricant is aqueous.
19. The mobile power tool as claimed in claim 18 , wherein the lubricant comprises, in addition to water, at least one additive.
20. The mobile power tool as claimed in claim 17 , wherein the lubricant comprises at least 5 percent water.