Chain saw

A chain saw and saw chain technology, applied in the field of chain saws, can solve the problems of discoloration of the edge of the exhaust opening and poor operating environment, and achieve the effect of maintaining the exhaust efficiency and suppressing the flying of dust.

Inactive Publication Date: 2010-06-09
HUSQVARNA ZENOAH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the exhaust sound propagated along with the discharge of the exhaust gas is easily conveyed to the operator, so it is considered that the operating environment is not good
Also, the exhaust opening is formed at a position corresponding to the opening of the muffler in the housing made of synthetic resin, and since the temperature of the exhaust gas discharged from the muffler is high, there is discoloration of the edge of the exhaust opening. worry

Method used

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Embodiment Construction

[0027] 1. The overall structure of the chain saw

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0029] figure 1 It is an overall perspective view of the chain saw 1 of this embodiment. exist figure 1 , the cross section represents the front part of the chain saw body 3 .

[0030] The structure of the chain saw 1 includes: a chain part 2 , a chain saw body 3 driving the chain part 2 , and a manipulation part 4 installed on the chain saw body 3 . The chain saw 1 of the present embodiment is a 2-stroke engine 31 having a 35cc (refer to figure 2 ) of the small chain saw, will be described in detail below for the 2-stroke engine 31. Hereinafter, the protruding direction of the chain portion 2 is defined as the front, the opposite direction is defined as the rear, the vertical direction is defined as the vertical direction, and the horizontal direction is defined as the vertical direction.

[0031] 2. Structure...

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PUM

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Abstract

The invention provides a chain saw. A muffler (5) structurally comprises a muffler body (51) and a passage part (52), wherein the muffler body (51) is arranged below an engine (31); and the passage part (52) is extended upwards from the muffler body (51) and is provided with openings on the upper side in front of a chain saw body (3). Accordingly, as exhaust air can be discharged towards the front of the chain saw body (3) and exhaust noise can be transmitted forwards, the exhaust noise capable of being heard by an operator is reduced to further improve the operating environment. In addition, the exhaust air is discharged after passing through the longer passage part (52) extending upwards from the muffler body (51) to cool the exhaust air. Therefore, although a shell (32) made of synthetic resin is usually utilized to cover the chain saw body (3) and an exhaust opening is formed at a position in the shell (32) corresponding to the openings (523, 524) of the passage part (52), the color of a marginal part of the exhaust opening can be prevented from being changed due to the heat of the exhaust air.

Description

technical field [0001] The present invention relates to a chain saw. Background technique [0002] Conventionally, chain saws used for operations such as felling trees, tree pruning, and pruning are well known. The structure of the chain saw includes: a plate-shaped guide plate, a chain saw body supporting the guide plate and housing a motor for driving a saw chain wound around the guide plate, and a handle connected to the chain saw body and capable of being held by an operator. [0003] Among such chain saws, a well-known one is a top handle type chain saw in which a handle is provided on an upper portion of a chain saw body (for example, Patent Document 1: Japanese Patent Laid-Open No. 2001-355446). [0004] However, in such a chain saw, the muffler opens on the side of the chain saw body, and the exhaust gas is discharged from the muffler to the side of the chain saw body. Therefore, the exhaust sound propagated along with the discharge of the exhaust gas is easily tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27B17/00
Inventor 下川晃一小林武平
Owner HUSQVARNA ZENOAH
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