Claims
- 1. A guide bar for a saw chain of a motor-driven chain saw having a housing, the saw chain including cutting links, lateral connecting links and center drive links pivotally connected to each other via rivets with the drive links having respective rakers formed thereon, the guide bar comprising:
an elongated planar base body defining an outer periphery wherein a peripheral guide groove is provided for receiving said rakers therein and for guiding said saw chain along said outer periphery; said guide bar having guiding surfaces along said outer periphery for supporting said lateral connecting links and said cutting links and said guiding surfaces being separated from each other by said guide groove; said guide bar having an attachment end at one end thereof for attaching said guide bar to the housing of said chain saw and a direction-changing section at the other end thereof for guiding said saw chain over the outer free end of said guide bar; guide plates mounted on said base body in said direction-changing section and extending radially beyond said guiding surfaces to laterally cover said connecting links and said cutting links of said saw chain; and, said guide plates being configured as rotating guide discs.
- 2. The guide bar of claim 1, further comprising means for rotatingly mounting said guide discs so as to be entrained and rotatably driven by said saw chain.
- 3. The guide bar of claim 2, wherein the taking along takes place via a force-tight engagement or a friction-tight engagement of said saw chain and said guide discs.
- 4. The guide bar of claim 1, further comprising an idler sprocket rotatably mounted in said direction-changing section; and, said guide discs being connected to said idler sprocket so as to rotate therewith.
- 5. The guide bar of claim 1, wherein said direction-changing section includes two side plates mounted on said guide bar; two bearings mounted in said side plates, respectively, and connected to corresponding ones of said guide discs.
- 6. The guide bar of claim 1, wherein each of said guide discs has a peripheral edge which ends at a small distance (a) radially below the roof cutting edges of the cutting links.
- 7. The guide bar of claim 6, wherein at least one of said cutting links has a cutting tooth having a cutting section extending over said peripheral edge.
- 8. The guide bar of claim 6, wherein each of said guide discs has a cutout formed in the peripheral edge thereof in the region of the cutting link so as to expose said cutting link.
- 9. The guide bar of claim 8, wherein the cutout has a length (L) viewed in the peripheral direction of said peripheral edge; said length (L) is configured longer than the cutting link; and, said cutout has a base edge which lies at the elevation of the lateral offset of the cutting link.
- 10. The guide bar of claim 8, wherein the cutout has radial edges configured as cutting teeth.
- 11. The guide bar of claim 1, further comprising ancillary discs defining respective guiding surfaces for said cutting links and said lateral connecting links; and, said ancillary discs being rotatably mounted in said direction-changing section.
- 12. The guide bar of claim 11, further comprising a central plate disposed in said direction-changing section and connected to said base body; a bearing mounted in said central plate; said ancillary discs and said guide discs being connected to each other so that they rotate together without slippage therebetween; and, said ancillary discs and said guide discs being held by said bearing common thereto on said central plate.
- 13. The guide bar of claim 12, wherein said lateral connecting links and said cutting links have cutouts formed therein; and, said ancillary discs have projections for engaging in said cutouts of said links.
Priority Claims (1)
Number |
Date |
Country |
Kind |
199 60 460.6 |
Dec 1999 |
DE |
|
RELATED APPLICATION
[0001] This application is a continuation of international patent application PCT/EP 00/12645, filed Dec. 13, 2000, and claiming priority from German patent application 199 60 460.6, filed Dec. 15, 1999.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP00/12645 |
Dec 2000 |
US |
Child |
10162899 |
Jun 2002 |
US |