Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Brushcutter

A technology of cluster cutting machine and engine, which is applied in the field of improvement of cooling mechanism, can solve problems such as heating, deformation, and high temperature of centrifugal clutch, and achieve the effect of avoiding the structure from becoming complicated

Active Publication Date: 2013-09-11
HUSQVARNA AB
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So, for example, when extending the nylon head of a nylon cutter to shovel a large amount of grass in a short period of time, the load on the shaft increases to cause continuous slip between the clutch drum and the clutch shoe, and thus the temperature of the centrifugal clutch becomes high
Therefore, due to radiant heat from the centrifugal clutch, the clutch housing may be heated beyond its softening temperature to be deformed, which leads to dropoff of the bearing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Brushcutter
  • Brushcutter
  • Brushcutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Such as Figures 1 to 3 As shown, the brush cutter 1 comprises: a main body 2 including as a main component a single cylinder two-stroke engine 4; an operating rod 3 having a base end connected to the main body 2; attachments such as blade saws and nylon cutters , attached to the other end of the operating rod 3 ; and a handle, attached to a part of the operating rod 3 . Engine 4 may be a four-stroke engine.

[0033] Inside the main body 2 , a carburetor 5 is attached to the engine 4 and an air cleaner 6 is attached to the carburetor 5 . An exhaust muffler 7 is attached to the engine 4 at a side opposite to the carburetor 5 . A fuel tank 8 is attached to the underside of the engine 4 . The carburetor 5 draws fuel from a fuel tank 8 .

[0034] The air cleaner 6 includes: a filter case 61 screwed to the carburetor 5; a sponge-like member 62 accommodated in the filter case 61; and a filter cover 64, It is attached to the filter case 61 by operating screws 63 .

[003...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A brushcutter includes: a centrifugal clutch (20) that transmits a drive force of an engine from a crankshaft to a drive shaft; a clutch housing (23) covering the cooling fan and the centrifugal clutch, the clutch housing being made of a synthetic resin; and a bearing that is held inside the clutch housing (23) and supports a coupling shaft that couples the drive shaft and the centrifugal clutch (20). A volute-shaped air-flow space (27) defined including a rise wall (26) surrounding the centrifugal clutch (20) is provided inside the clutch housing (23) near an outer circumference of the centrifugal clutch (20). An inflow opening (28, 29) that lets a cooling air flowing in the air-flow space (27) flow into an inner air-flow space (53) and an outflow opening (52) that lets the cooling air flowing in the air-flow space (53) flow out to the air-flow space (27) are provided on the rise wall (26).

Description

technical field [0001] This invention relates to a bush cutter and in particular to an improvement in the cooling mechanism of a centrifugal clutch. Background technique [0002] Known brush cutters generally use an engine as a drive source. In a brush cutter, the driving force from the driving source is transmitted to the shaft in the operating lever via the centrifugal clutch. The driving force rotates attachments attached to the end of the shaft, such as blade saws and nylon cutters. [0003] The centrifugal clutch includes: an attachment plate coupled to a crankshaft of an engine; a clutch shoe rotatably attached to the attachment plate, the clutch shoe rotating according to centrifugal force; and a clutch drum, the clutch drum In frictional engagement with the radially outwardly rotating clutch shoes, the clutch drum is connected to the base end of the shaft. The driving force is transmitted via the frictionally engaged clutch shoes and clutch drum. [0004] The cen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02B63/02F01P1/06F01P5/06
CPCF02B63/02F01P1/06F01P5/06
Inventor 木村隆之保刈弘川崎裕介
Owner HUSQVARNA AB
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com