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Chain saw

A technology of chain saws and chains, applied in the field of chain saws, which can solve problems such as poor reliability, poor durability, and complex structures, and achieve the effects of ensuring safety, ensuring convenience, and facilitating tensioning

Pending Publication Date: 2019-12-20
CHANGZHOU GLOBE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Complex structure, poor reliability and durability

Method used

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Embodiment Construction

[0028] In order to make the purpose, technical solution and effect of the present application more clear and definite, the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0029] see Figure 1 ~ Figure 3 Shown is a chain saw 100 provided by the present invention. The chainsaw 100 includes a housing 1, a drive system 2 accommodated in the housing 1, a guide plate 3 extending outward from the housing 1, a chain arranged on the guide plate 3 and driven by the drive system 2 to reciprocate 4 and a tensioning assembly 5 for tensioning the chain 4.

[0030] In a preferred embodiment of the present invention, the casing 1 includes a first casing (not numbered) and a second casing (not numbered) that are snap-fitted, and the first casing and the second casing are surrounded to form a In the housing space for housing the drive system 2, and in this embodiment, the housing 1 is also provided with a rear handle 11...

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Abstract

The invention provides a chain saw. The chain saw comprises a shell, a driving system accommodated in the shell, a guide plate outwards extending from the shell, a chain arranged on the guide plate and driven by the driving system, and a tensioning module for tensioning the chain; the guide plate is provided with a connecting part corresponding to the tensioning module; the tensioning module comprises an operation part, a tensioning part, and a transmission module for transmission connection of the operation part and the tensioning part; and as the operation part and the transmission module are in unhooking fit, when users enable the chain to be in a tensioned state through cooperation of the tensioning module and the connecting part, redundant tensioning force transferred by the tensioning module is released. Through arrangement of the tensioning module, the chain saw can achieve the purpose of fastening the guide plate when the chain of the chain saw is tensioned; and the chain saw is simple, reliable and durable in structure, and reduces the production and use cost.

Description

technical field [0001] The invention relates to a chain saw, in particular to a chain tensioning structure of the chain saw. Background technique [0002] A chainsaw is a garden tool that cuts wood or branches by rotating a powered chain with blades at high speed. If the chain is not properly tensioned, a loose chain may jump off the bar causing injury to the operator, and a chain that is too tight may cause high temperature failure due to excessive friction between the chain and the bar. Also, during use, due to chain wear, the tension of the chain changes considerably, and after a period of use, the length of the chain gradually increases, resulting in a decrease in the tension of the chain. [0003] At present, the existing known chain tensioning methods are roughly divided into two categories. One type requires the use of one or more special tools to directly or indirectly rotate the adjusting screw and tighten the clamping nut. This structure requires It is inconvenie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27B17/02B27B17/14
CPCB27B17/025B27B17/14
Inventor 李夏子
Owner CHANGZHOU GLOBE CO LTD
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