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Chainsaw arrangement

A chain saw and cylinder technology, which is applied to chainsaws, mufflers, exhaust devices, etc., can solve the problems that the chain saw requires a lot of effort and the operator is easily fatigued.

Active Publication Date: 2011-11-16
HUSQVARNA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this construction, a lot of effort is required to maneuver the chain saw and the operator is prone to fatigue

Method used

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Examples

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Embodiment Construction

[0014] figure 1 and 2 The chainsaws 1 shown in both have an internal combustion engine 3 with a cylinder 4 in which a piston 5 connected to a crankshaft 6 is guided reciprocatingly. Said cylinder 4 is tilted rearward at an angle a with respect to a direction perpendicular to the horizontal plane 13 such that the lower front of the chainsaw body 2 and thus the front handle 7 / are closer to the center of mass (not shown) of the chainsaw 1 , Or more specifically, closer to a previously defined axis of rotation (not shown). The horizontal plane 13 is defined as a plane on which the chain saw 1 can rest in an upright position when not in operation, preferably a plane that remains in contact with the flat bottom surface of the chain saw 1 . exist figure 1 In the configuration shown in , the angle a is about 20°, but it could also be 5-45° (e.g. 9°, 12°, 15°, 18°, 22°, 25°, 30°, 35° or 40° ) and still achieve a beneficial relationship between the distances B and D, where D is the...

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PUM

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Abstract

A chainsaw (1) comprises an internal combustion engine (3) having a cylinder (4) with a piston (5) connected to a crankshaft (6). The piston (5) has an upper surface at a distance D from the central axis of the crankshaft (6) measured along the longitudinal axis defined by the cylinder (4), when the piston (5) is in its top dead centre. The chainsaw (1) is further provided with a front handle (7), which central axis is disposed at a distance B from the central axis of the crank shaft (6) along an axis substantially perpendicular to a horizontal plane (13), the horizontal plane (13) being defined as the plane on which the chainsaw (1) may rest in an upright position when not operated. The chainsaw (1) also includes a throttle lever (9), which rear end is disposed at a distance C from the central axis of the crankshaft (6) along an axis substantially parallel to the horizontal plane (13). The cylinder (4) is inclined backwards, such that the angle between the longitudinal axis defined by the cylinder (4) and an axis perpendicular to the horizontal plane (13) is between 5 and 45 DEG , and the chainsaw (1) further having a basic design such that the relation B / D is less than or equal to 1.7, so as to provide a low front handle (7).

Description

technical field [0001] The invention relates to a chain saw comprising an internal combustion engine having a cylinder with a piston connected to a crankshaft, measured along a longitudinal axis defined by the cylinder when the piston is at its top dead center, The distance between the upper surface of the piston and the central axis of the crankshaft is D. Furthermore, the invention relates to a chainsaw having a front handle, the central axis of which is arranged at a distance B from the central axis of the crankshaft in a direction perpendicular to a horizontal plane defined as when the chainsaw is not A surface that you can rest on in an upright position while working. Furthermore, the chainsaw comprises a throttle rod, the rear end of which is arranged at a distance C from the central axis of the crankshaft along an axis substantially parallel to the horizontal plane. Background technique [0002] When designing conventional chainsaws, especially chainsaws powered by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27B17/02B25F5/02
CPCF01N1/00F01N2340/04B27B17/00F01N2590/06B25F5/02
Inventor 佩尔·马丁松
Owner HUSQVARNA AB