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Chain saw tensioning mechanism with locking teeth

An adjustable chain, non-locking technology, used in chainsaws, bandsaws, manufacturing tools, etc., to solve problems such as cutting chain elongation

Inactive Publication Date: 2005-07-20
胡斯华纳户外产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The cutting chain of a chain saw can loosen on the guide plate after many uses due to wear, which can cause the cutting chain to elongate (stretch)

Method used

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  • Chain saw tensioning mechanism with locking teeth
  • Chain saw tensioning mechanism with locking teeth
  • Chain saw tensioning mechanism with locking teeth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] figure 1 Shown at and 2 is a chain saw 10 that includes an example of the chain tensioning mechanism 12 of the present invention. The chainsaw 10 has a motor base 14 and a motor (not shown) on the base. It will be appreciated that the motor rotates a drive sprocket 16 (see FIG. 2 ) which is connected to the drive shaft of the motor. The drive sprocket 16 and endless cutting chain 18 (see figure 1 ) The chain rings are engaged and push the cutting chain to move around a guide plate 20.

[0014] Guide plate 20 is an elongated plate structure having a channel or slot 22 (see figure) on it around its perimeter and an idler sprocket (not shown) at its distal end around which the chain of cutting chain 18 surrounds. straddle the idler sprocket. Parallel pins or studs 24 and 26 are secured to the engine mount 14, lie in a common generally horizontal plane and extend vertically through an elongated horizontal slot 28 in the guide plate 20 in a sliding fit. middle. The stu...

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PUM

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Abstract

A tensioning mechanism for adjusting tension of a cutting chain in a chain saw. A rotatable knob operates with an engine chassis, clutch cover, and guide bar, whereby the knob may be rotated between a tightened position and loosened position, by which the guide bar is loosened and may be adjusted. The knob is provided with a knob handle, pivotally connected to the knob and pivotable between locked and unlocked positions. When the knob handle is in the locked position, at least one, but not all, of a plurality of handle engagement points engage with corresponding fixed engagement points that are fixed relative to the clutch cover. When the knob handle is in the unlocked position, the handle engagement points are disengaged from the fixed engagement points. Further, the engagement points are visible when the knob handle is in both locked and unlocked positions.

Description

technical field [0001] The present invention relates to a device for facilitating the periodic tensioning of an endless cutting chain on the guide plate of a chainsaw. Background of the invention [0002] The cutting chain of a chain saw can loosen on the guide plate after many uses due to wear, which can cause the cutting chain to elongate (stretch). There are several chainsaw constructions and related methods for moving the guide bar longitudinally away from the body and drive sprocket of the chainsaw in order to free the cutting chain from slack and to ensure that the links of the cutting chain remain snugly fitted in the peripheral grooves in the guide bar middle. [0003] Some constructions and related methods require the operator to use one or more separate tools to release the retaining assembly in order to clamp the guide plate and move the guide plate longitudinally from the chassis to increase the tension of the cutting chain and The retaining assembly is then re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D57/02B27B13/00B27B13/08B27B17/14
CPCB27B17/14
Inventor 杰夫·S·弗兰克
Owner 胡斯华纳户外产品有限公司