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Brake Assembly for Power Driven Handheld Cutting Units

A technology of braking components and cutting devices, which is applied in the direction of sawing components, couplings and brakes, brake types, etc., and can solve problems such as unintentional deactivation of brakes

Active Publication Date: 2016-07-06
HUSQVARNA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Braking components have multiple disadvantages
For example, after actuating the brakes, the brakes may be inadvertently deactivated (inactivate, block activity, off)

Method used

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  • Brake Assembly for Power Driven Handheld Cutting Units
  • Brake Assembly for Power Driven Handheld Cutting Units
  • Brake Assembly for Power Driven Handheld Cutting Units

Examples

Experimental program
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Embodiment Construction

[0030] The present invention will now be described more fully with reference to the accompanying drawings, in which example embodiments are shown. However, the invention should not be construed as limited to the embodiments set forth herein. The disclosed features of the example implementations may be combined as readily understood by one of ordinary skill in the art to which this invention pertains. Like reference numerals refer to like elements throughout.

[0031] Well-known functions or constructions are not necessarily described in detail for brevity and / or clarity.

[0032] figure 1 A handheld power driven cutting device 2 is shown according to some embodiments. The cutting device 2 is provided in the form of a motor-driven chainsaw 2 . The chain saw 2 comprises a cutting tool 3 in the form of a cutting chain 3 movably arranged around a guide bar 4 . The cutting chain 3 may have cutting teeth and be arranged to include a rotatable part 22 (in figure 2 The transmis...

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PUM

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Abstract

The invention provides a brake assembly (1) for a hand-held power-driven cutting device (2), comprising: a movably arranged rod (14), movable at least between a first position and a second position; a moving member (16); and a brake element (20), which is connected to or forms a unit with the rotatable part (22) of the transmission of the cutting device (2); wherein the brake member (16) is not and wherein the braking member (16) is arranged to engage the braking element (20) in the activated position to prevent rotation of the rotatable part (22). The brake assembly (1) further comprises a retaining mechanism (23) arranged to retain the brake member (16) in an inactive position when the lever (14) is in the first position; and a first elastic element (18) , the first resilient element is arranged to bias the detent member (16) towards the activated position; and wherein the detent member (16) is arranged to be released from the retaining mechanism (23) in response to the rod (14) entering the second position; and wherein When released, the braking member (16) is adapted to be pushed towards the activated position by the first elastic element (18); and wherein the braking member (16) is arranged in a structure with the braking element (20) in said activated position (34) engages to prevent rotation of brake element (20).

Description

technical field [0001] The present invention relates to a brake assembly for a powered hand-held cutting device. The invention further relates to a chainsaw comprising a brake assembly. Background technique [0002] Using a powered hand-held cutting device, an operator may, for example, cut or saw vegetation such as trees, bushes, branches, grass, and the like. Many of today's power-operated hand-held cutting devices are equipped with some sort of brake assembly. The brake assembly may include a handguard arranged to actuate the brake. When this assembly is used in the technical field of chainsaws, this assembly may be called a kickback safety assembly, a chain brake assembly, or a kickback guard. This assembly is arranged to impede the rotation of the rotatable part of the transmission of the chainsaw to impede the movement of the chain in the event the guide bar of the chainsaw kicks back towards the user. Since the assembly is intended to protect the user from the mov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27B17/08B27G19/00
CPCB27B17/083F16D63/006F16D67/02
Inventor 约翰·林德布拉德比约恩·罗斯贝里摩根·斯文松
Owner HUSQVARNA AB