Chainsaw

Patent metadata

Field	Value
Publication number	US-10814518-B2
Application number	US-201815937433-A
Country	US
Kind code	B2
Filing date	Mar 27, 2018
Priority date	Apr 4, 2017
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A chainsaw having a drive motor. The chainsaw has a fixed part and a movable part. The guide bar is retained on the fixed part in a manner braced between the fixed part and a tensioning element. The movable part is shiftable in a longitudinal direction with respect to the fixed part in order to tension the saw chain with the tensioning element released. The chainsaw has a stop face and a tensioning face. At least one additional contact face that is firmly connected to the fixed part in the longitudinal direction and at least one additional contact face that is firmly connected to the movable part in the longitudinal direction are arranged between the stop face and the tensioning face. All the contact faces lie one after another in the flux of force from the tensioning element to the fixed part.

First claim

We claim:

1. A chainsaw, comprising: a guide bar; a saw chain that circulates on the guide bar; a drive motor that drives the saw chain circulating on the guide bar, wherein the chainsaw has a fixed part which comprises the drive motor, and wherein the chainsaw has a movable part which comprises the guide bar; a tensioning element arranged so that the guide bar is retained on the fixed part at one end braced between the fixed part and the tensioning element transversely to a longitudinal plane of the guide bar, wherein the movable part is shiftable in a longitudinal direction of the guide bar with respect to the fixed part to tension the saw chain with the tensioning element released; a stop face firmly connected to the fixed part in the longitudinal direction with the tensioning element released; and a tensioning face of the tensioning element, said tensioning face being firmly connected to the tensioning element in the longitudinal direction with the tensioning element released; at least two contact faces firmly connected to the movable part in the longitudinal direction with the tensioning element released, wherein one contact face of the at least two contact faces bears against the stop face and a further contact face of the at least two contact faces bears against the tensioning face; and at least one additional contact face firmly connected to the fixed part in the longitudinal direction with the tensioning element released arranged between the stop face and the tensioning face and at least one additional contact face firmly connected to the movable part in the longitudinal direction with the tensioning element released arranged between the stop face and the tensioning face, wherein all of the contact faces lie in succession in a flux of force from the tensioning element to the fixed part, further comprising at least one first clamping element and a second clamping element, wherein the at least one contact face that is firmly connected to the fixed part in the longitudinal direction with the tensioning element released is formed on the first clamping element and the at least one additional contact face that is firmly connected to the movable part in the longitudinal direction with the tensioning element released is formed on the second clamping element, wherein the clamping elements each comprise at least two plates extending parallel to the longitudinal plane, and in that the at least two plates of the first clamping element and the at least two plates of the second clamping element engage in one another in a lamellar manner.

2. The chainsaw according to claim 1 , wherein the contact faces and the at least one additional contact face firmly connected to the movable part with the tensioning element released and the at least one additional contact face firmly connected to the fixed part with the tensioning element released together total at least four contact faces that are arranged between the contact faces of the stop face and the tensioning face.

3. The chainsaw according to claim 2 , wherein the total contact faces includes at least eight contact faces arranged between the stop face and the tensioning face.

4. The chainsaw according to claim 1 , wherein the contact faces extend parallel to the longitudinal plane of the guide bar with the tensioning element tensioned.

5. The chainsaw according to claim 1 , wherein the contact faces are arranged alongside one another in a section plane perpendicular to the longitudinal plane.

6. The chainsaw according to claim 1 , wherein the clamping elements each comprise at least one plate extending parallel to the longitudinal plane.

7. The chainsaw according to claim 6 , wherein the plates of the clamping elements have a width in each case that is less than a length and a height of the plates.

8. The chainsaw according to claim 6 , wherein the plates are resilient.

9. The chainsaw according to claim 1 , wherein the first clamping element and/or the second clamping element are folded.

10. The chainsaw according to claim 1 , wherein the first clamping element and/or the second clamping element are is made of stainless steel.

11. The chainsaw according to claim 1 , further comprising a bolt that projects through the first clamping element and securely retains the first clamping element on the fixed part in the longitudinal direction.

12. The chainsaw according to claim 1 , further comprising a spring arranged to retain the first clamping element on the fixed part in a play-free manner in the longitudinal direction.

13. The chainsaw according to claim 1 , further comprising a magnet arranged in the fixed part so as to retain the movable part on the fixed part with the tensioning element released.

14. A chainsaw, comprising: a guide bar; a saw chain that circulates on the guide bar; a drive motor that drives the saw chain circulating on the guide bar, wherein the chainsaw has a fixed part which comprises the drive motor, and wherein the chainsaw has a movable part which comprises the guide bar; a tensioning element arranged so that the guide bar is retained on the fixed part at one end braced between the fixed part and the tensioning element transversely to a longitudinal plane of the guide bar, wherein the movable part is shiftable in a longitudinal direction of the guide bar with respect to the fixed part to tension the saw chain with the tensioning element released; a stop face firmly connected to the fixed part in the longitudinal direction with the tensioning element released; and a tensioning face of the tensioning element, said tensioning face being firmly connected to the tensioning element in the longitudinal direction with the tensioning element released; at least two contact faces firmly connected to the movable part in the longitudinal direction with the tensioning element released, wherein one contact face of the at least two contact faces bears against the stop face and a further contact face of the at least two contact faces bears against the tensioning face; and at least one additional contact face firmly connected to the fixed part in the longitudinal direction with the tensioning element released arranged between the stop face and the tensioning face and at least one additional contact face firmly connected to the movable part in the longitudinal direction with the tensioning element released arranged between the stop face and the tensioning face, wherein all of the contact faces lie in succession in a flux of force from the tensioning element to the fixed part, further comprising at least one first clamping element and a second clamping element, wherein the at least one contact face that is firmly connected to the fixed part in the longitudinal direction with the tensioning element released is formed on the first clamping element and the at least one additional contact face that is firmly connected to the movable part in the longitudinal direction with the tensioning element released is formed on the second clamping element, wherein the clamping elements each have a width measured perpendicularly to the longitudinal plane, wherein the width of the clamping elements with the tensioning element released is in each case greater than the width of the clamping elements with the tensioning element tensioned.

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Gerstenberger Oliver
• Zimmermann Helmut
• Fricker Andreas

Classifications

• F16B2/005

  Means to increase the friction-coefficient · CPC title

• B27B17/14 Primary

  Arrangements for stretching the chain saw · CPC title

• B27B17/08

  Drives or gearings; Devices for swivelling or tilting the chain saw · CPC title

• F16B5/02

  by means of fastening members using screw-thread ({F16B5/0004 takes precedence}; construction of screw-threaded connections F16B25/00 - F16B39/00) · CPC title

• B27B17/0008

  Means for carrying the chain saw, e.g. handles (B27B17/0033 takes precedence) · CPC title