WO2007091925A1 - A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end. - Google Patents

A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end. Download PDF

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Publication number
WO2007091925A1
WO2007091925A1 PCT/SE2006/000165 SE2006000165W WO2007091925A1 WO 2007091925 A1 WO2007091925 A1 WO 2007091925A1 SE 2006000165 W SE2006000165 W SE 2006000165W WO 2007091925 A1 WO2007091925 A1 WO 2007091925A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
gear
gear housing
tool
clamping member
Prior art date
Application number
PCT/SE2006/000165
Other languages
French (fr)
Inventor
Ola Agne
Original Assignee
Husqvarna Aktiebolag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Husqvarna Aktiebolag filed Critical Husqvarna Aktiebolag
Priority to EP06716869.0A priority Critical patent/EP1986486A4/en
Priority to PCT/SE2006/000165 priority patent/WO2007091925A1/en
Publication of WO2007091925A1 publication Critical patent/WO2007091925A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
    • A01G3/047—Apparatus for trimming hedges, e.g. hedge shears portable
    • A01G3/053—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven
    • A01G3/0535—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven with rotatable knives
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
    • A01D34/90—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for carrying by the operator
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/06—Hand-held edge trimmers or shears for lawns
    • A01G3/062—Motor-driven edge trimmers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/06—Hand-held edge trimmers or shears for lawns
    • A01G3/067—Motor-driven shears for lawns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/12—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using sliding jaws

Definitions

  • Appliance for a portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end of the tube.
  • a drive shaft extends inside the tube from the engine to a first gear located inside a gear housing in the opposite end of the tube.
  • a drive pin for the working tool extends from a second gear in contact with the first gear.
  • Engine powered portable tool are widely used to facilitate work in forests, gardens and parks.
  • tools available like for example trimmers, clearing saws, cutters for pruning of trees and saws for mulching of vegetation.
  • These tools are available in different sizes to meet the requirements for different kinds of work. The smallest ones are hand held while bigger and heavier tools are carried in an ergonomic harness or strap placed around the shoulders of the operator.
  • These types of portable tools have the engine and related components placed in one end of an elongated tube.
  • a drive shaft is extending inside the tube to a first gear in contact with a second gear.
  • the first and second gears are located inside a gear housing secured to the tube in the opposite end as the engine.
  • a working tool is releasable secured to a drive pin extending from the second gear to make it possible to replace worn out working tools.
  • the objects of the claimed invention is to provide an appliance that increases the strength of the components in the working tool end of the tool and thereby reduce the number of required types of tools for the operator.
  • the claimed appliance is a separate gear housing support comprising a first and a second clamping member placed opposite each other around the gear housing and the tube.
  • the ends of the first and second clamping members placed towards the tube are configured to be clamped around the tube by a first tensioning means, while the opposite ends of the clamping members are configured to be clamped around the gear housing by a second tensioning means.
  • the appliance supports the first and second gear, the gear housing and the fastening of the gear housing in the tube when a working tool that exposes the different components for increased loads is used.
  • the claimed appliance acts as a reinforcement of the first and second gear, the gear housing and the fastening of the gear housing in the tube and makes it possible to alternate the type of working tool used. Consequently, the number of tool types required by the operator is reduced considerably by the use of the claimed invention.
  • Another advantage with the appliance is that it is easily mounted on the tool when the working tool is changed to a type exposing the involved components to larger loads that the tool is originally designed for.
  • the appliance also provides a fastening means for a working tool cover that is needed when a different type of working tool than the type that the tool is designed for is used.
  • Figure 1 Illustrates a portable tool with the working tool placed in the end of an elongated tube.
  • Figure 2. Illustrates an exploded view of the claimed appliance and the working tool end of the tool.
  • Figure 3. Illustrates an exploded view of the appliance in figure 2.
  • a portable tool 10 is disclosed in figure 1.
  • the tool 10 comprises an engine 11 and related components placed in one end of an elongated tube 12.
  • the tube 12 has a circular cross section and is normally made of a metallic or plastic material. Other cross-sectional shapes like oval or square as well as other materials could also be used.
  • the tool 10 is provided with a handle 13 secured to the tube 12. The position of the handle 13 is adjustable along the tubel2. The position is selected to be comfortable for the operator.
  • a drive shaft extending from the engine 11 to a first gear in the opposite end of the tube 12.
  • the drive shaft is normally supported by one elongated bearing or a number of bearings placed along the drive shaft inside the tube 12.
  • the bearing is not illustrated in the drawings.
  • a drive pin 15 is extending from a second gear in contact with the first gear.
  • a working tool 16, illustrated in figure 2 is secured to the drive pin 15.
  • a threaded portion 30 in the end of the drive pin 15 and a nut 31 achieves the securing so that the working tool 16 is releasable and easy to replace or change to a different type of working tool
  • the first and second gear is surrounded by a gear housing 17 that prevents dirt and cut vegetation from damaging the components inside the gear housing 17.
  • FIG 2 is one embodiment of the claimed gear housing support 18 illustrated.
  • the gear housing support 18 comprises a first clamping member 19 and a second clamping member 20.
  • the first 19 and second 20 clamping members are placed opposite each other around the gear housing 17 and the tube 12 and are configured to be clamped around the gear housing 17 and the tube 12.
  • the clamping members 19 and 20 are extending in the same longitudinal direction as the longitudinal direction of the tube 12.
  • One end of the first 19 and the second clamping member 20 is secured around the tube 12.
  • the contact surface between the clamping members and the tube 12 on the clamping members are shaped to be in contact with the outer surface of the tube 12.
  • first 19 and second 20 clamping members are secured around the gear housing 17 and shaped to be in contact with the outside surface of the gear housing 17 in order to support and strengthen the gear 14, the gear housing 17 and the securing of the first and second gear and the gear housing 17 in the tube 12.
  • a first tensioning means 21 is placed in the end of the gear housing support 18 positioned towards the tube 12 and a second tensioning 22 means is placed in the other end.
  • the first 21 and the second 22 tensioning means consist of two screw joint reinforcements 23 respectively.
  • the screw joint reinforcements are placed so that the clamping members 19 and 20 are secured around the tube 12.
  • Each screw joint reinforcement comprises a screw 24 passing through a hole 32 in the first clamping member 19 and then secured in a thread 25 in the second clamping member 20.
  • the second clamping member 20 is provided with a protruding flange 26 placed close to the tube end of the second clamping member 20.
  • the protruding flange 26 extends in substantially radial direction from the tube 12 and is used for fastening of a working tool cover 27 in order to prevent cut vegetation from being thrown at the operator.
  • the working tool cover 27 is extending over a sector of the periphery of the rotating working tool 16 and is fastened to the protruding flange 24 by four screws 28 and nuts 29.
  • the illustrated working tool 16 is a mulching blade used for cutting bushes and small trees into small pieces. The working tool type is however easily changed to for example a saw blade or a string trimmer head.

Abstract

Appliance for a portable tool (10) comprising an engine (11) placed at one end of an elongated tube (12) and a working tool (16) placed in the opposite end of the tube (12). A drive shaft extends inside the tube (12) from the engine (11) to a first gear located inside a gear housing (17) fastened to the tube (12) in the opposite end of the tube (12). A drive pin (15) for the working tool (16) extends from a second gear in contact with the first gear. Said appliance is a separate gear housing support (18) comprising a first clamping member (19) and a second clamping member (20) placed opposite each other around the gear housing (17) and the tube (12). The ends of the first (19) and second (20) holding member placed towards the tube (12) are configured to be clamped around the tube (12) by a first tensioning means (21) while the opposite ends of the clamping members (19, 20) are configured to be clamped around the gear housing (17) by a second tensioning means (22) in order to support the first and second gear, the gear housing (17) and the fastening of the gear housing (17) in the tube (12).

Description

A PORTABLE TOOL COMPRISING AN ENGINE PLACED AT ONE END OF AN ELONGATED TUBE AND A WORKING TOOL PLACED IN THE OPPOSITE END .
Technical field
Appliance for a portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end of the tube. A drive shaft extends inside the tube from the engine to a first gear located inside a gear housing in the opposite end of the tube. A drive pin for the working tool extends from a second gear in contact with the first gear.
Background of the invention
Engine powered portable tool are widely used to facilitate work in forests, gardens and parks. There are a number of different types of tools available like for example trimmers, clearing saws, cutters for pruning of trees and saws for mulching of vegetation. These tools are available in different sizes to meet the requirements for different kinds of work. The smallest ones are hand held while bigger and heavier tools are carried in an ergonomic harness or strap placed around the shoulders of the operator. These types of portable tools have the engine and related components placed in one end of an elongated tube. A drive shaft is extending inside the tube to a first gear in contact with a second gear. The first and second gears are located inside a gear housing secured to the tube in the opposite end as the engine. A working tool is releasable secured to a drive pin extending from the second gear to make it possible to replace worn out working tools.
All these different types of tools however require that an operator is in the possession of several different tools to cover the entire range of work that needs to be done in forests and gardens. The use of a different type of working tool in combination with a tool not intended for that specific working tool, in order to reduce the number of different tools required by the operator, has turned out to some times cause severe structural damages to the components placed in the working tool end of the tool. This is due to different, and in some cases increased, loads on the components in the working tool end of the tool. Object of the invention
The objects of the claimed invention is to provide an appliance that increases the strength of the components in the working tool end of the tool and thereby reduce the number of required types of tools for the operator.
Summary of the invention
The problems disclosed above are solved by the claimed appliance with the features defined in the characterising portion of the independent claim.
The claimed appliance is a separate gear housing support comprising a first and a second clamping member placed opposite each other around the gear housing and the tube. The ends of the first and second clamping members placed towards the tube are configured to be clamped around the tube by a first tensioning means, while the opposite ends of the clamping members are configured to be clamped around the gear housing by a second tensioning means. The appliance supports the first and second gear, the gear housing and the fastening of the gear housing in the tube when a working tool that exposes the different components for increased loads is used.
The claimed appliance acts as a reinforcement of the first and second gear, the gear housing and the fastening of the gear housing in the tube and makes it possible to alternate the type of working tool used. Consequently, the number of tool types required by the operator is reduced considerably by the use of the claimed invention.
Another advantage with the appliance is that it is easily mounted on the tool when the working tool is changed to a type exposing the involved components to larger loads that the tool is originally designed for.
The appliance also provides a fastening means for a working tool cover that is needed when a different type of working tool than the type that the tool is designed for is used. Brief description of the drawings
One embodiment of the claimed invention will be described with reference to the figures.
Figure 1. Illustrates a portable tool with the working tool placed in the end of an elongated tube.
Figure 2. Illustrates an exploded view of the claimed appliance and the working tool end of the tool. Figure 3. Illustrates an exploded view of the appliance in figure 2.
Detailed description of the drawings
A portable tool 10 is disclosed in figure 1. The tool 10 comprises an engine 11 and related components placed in one end of an elongated tube 12. The tube 12 has a circular cross section and is normally made of a metallic or plastic material. Other cross-sectional shapes like oval or square as well as other materials could also be used. The tool 10 is provided with a handle 13 secured to the tube 12. The position of the handle 13 is adjustable along the tubel2. The position is selected to be comfortable for the operator.
Inside the tube 12 is a drive shaft extending from the engine 11 to a first gear in the opposite end of the tube 12. The drive shaft is normally supported by one elongated bearing or a number of bearings placed along the drive shaft inside the tube 12. The bearing is not illustrated in the drawings. A drive pin 15 is extending from a second gear in contact with the first gear. A working tool 16, illustrated in figure 2, is secured to the drive pin 15. A threaded portion 30 in the end of the drive pin 15 and a nut 31 achieves the securing so that the working tool 16 is releasable and easy to replace or change to a different type of working tool
16. The first and second gear is surrounded by a gear housing 17 that prevents dirt and cut vegetation from damaging the components inside the gear housing 17.
In figure 2 is one embodiment of the claimed gear housing support 18 illustrated. The gear housing support 18 comprises a first clamping member 19 and a second clamping member 20. The first 19 and second 20 clamping members are placed opposite each other around the gear housing 17 and the tube 12 and are configured to be clamped around the gear housing 17 and the tube 12. The clamping members 19 and 20 are extending in the same longitudinal direction as the longitudinal direction of the tube 12. One end of the first 19 and the second clamping member 20 is secured around the tube 12. The contact surface between the clamping members and the tube 12 on the clamping members are shaped to be in contact with the outer surface of the tube 12. The other ends of the first 19 and second 20 clamping members are secured around the gear housing 17 and shaped to be in contact with the outside surface of the gear housing 17 in order to support and strengthen the gear 14, the gear housing 17 and the securing of the first and second gear and the gear housing 17 in the tube 12.
A first tensioning means 21 is placed in the end of the gear housing support 18 positioned towards the tube 12 and a second tensioning 22 means is placed in the other end. The first 21 and the second 22 tensioning means consist of two screw joint reinforcements 23 respectively. The screw joint reinforcements are placed so that the clamping members 19 and 20 are secured around the tube 12. Each screw joint reinforcement comprises a screw 24 passing through a hole 32 in the first clamping member 19 and then secured in a thread 25 in the second clamping member 20.
The second clamping member 20 is provided with a protruding flange 26 placed close to the tube end of the second clamping member 20. The protruding flange 26 extends in substantially radial direction from the tube 12 and is used for fastening of a working tool cover 27 in order to prevent cut vegetation from being thrown at the operator. The working tool cover 27 is extending over a sector of the periphery of the rotating working tool 16 and is fastened to the protruding flange 24 by four screws 28 and nuts 29. The illustrated working tool 16 is a mulching blade used for cutting bushes and small trees into small pieces. The working tool type is however easily changed to for example a saw blade or a string trimmer head.

Claims

1. Appliance for a portable tool (10), said tool (10) comprising an engine (11) placed at one end of an elongated tube (12) and a working tool (16) placed in the opposite end of the tube (12), a drive shaft extending inside the tube (12) from the engine (11) to a first gear located inside a gear housing (17) fastened to the tube (12) in the opposite end of the tube (12), a drive pin (15) for the working tool (16) extend from a second gear in contact with the first gear, characterised by a separate gear housing support (18) comprising a first clamping member (19) and a second clamping member (20) placed opposite each other around the gear housing (17) and the tube (12), the ends of the first
(19) and second (20) clamping member placed towards the tube (12) are configured to be clamped around the tube (12) by a first tensioning means (21) while the opposite ends of the clamping members (19, 20) are configured to be clamped around the gear housing (17) by a second tensioning means (22) in order to support the gear housing (17) and the fastening of the gear housing (17) in the tube(12).
2. Appliance according to claim 1, characterised in that the first (19) and the second (20) clamping member extend in the same longitudinal direction as the longitudinal direction of the tube (12).
3. Appliance according to claim 1 or 2, characterised in that the first (21) and the second (22) tensioning means comprises two screw joint reinforcements (23) respectively, each screw joint reinforcement comprises a screw (24) passing through a hole (32) in the first clamping member (19) and secured in a thread (25) in the second clamping member (20).
4. Appliance according to any of the previous claims, characterised in that the second clamping member (20) is provided with a protruding flange (26) for fastening of a working tool cover (27) that prevents cut vegetation from being thrown at the operator.
PCT/SE2006/000165 2006-02-07 2006-02-07 A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end. WO2007091925A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06716869.0A EP1986486A4 (en) 2006-02-07 2006-02-07 A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end.
PCT/SE2006/000165 WO2007091925A1 (en) 2006-02-07 2006-02-07 A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2006/000165 WO2007091925A1 (en) 2006-02-07 2006-02-07 A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end.

Publications (1)

Publication Number Publication Date
WO2007091925A1 true WO2007091925A1 (en) 2007-08-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2006/000165 WO2007091925A1 (en) 2006-02-07 2006-02-07 A portable tool comprising an engine placed at one end of an elongated tube and a working tool placed in the opposite end.

Country Status (2)

Country Link
EP (1) EP1986486A4 (en)
WO (1) WO2007091925A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMS20080006A1 (en) * 2008-09-04 2010-03-05 Mario Cocco BRIDLE WITH CUTTING BLADE WITH BRUSHCUTTER IN RESTRICTED SPACES
WO2015094027A1 (en) * 2013-12-16 2015-06-25 Husqvarna Ab Handle arrangement for a power tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187926A (en) * 1986-03-18 1987-09-23 Wing Chee Seck Vegetation cutters
US20020116826A1 (en) * 2001-02-26 2002-08-29 Warren Sanders Trimmer with output shaft locking mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL26497C (en) * 1900-01-01
JPS5992630U (en) * 1982-12-16 1984-06-23 株式会社共立 brush cutter
DE10045598B4 (en) * 2000-09-15 2014-03-20 Andreas Stihl Ag & Co. Guide tube for a hand-held implement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187926A (en) * 1986-03-18 1987-09-23 Wing Chee Seck Vegetation cutters
US20020116826A1 (en) * 2001-02-26 2002-08-29 Warren Sanders Trimmer with output shaft locking mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1986486A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMS20080006A1 (en) * 2008-09-04 2010-03-05 Mario Cocco BRIDLE WITH CUTTING BLADE WITH BRUSHCUTTER IN RESTRICTED SPACES
WO2015094027A1 (en) * 2013-12-16 2015-06-25 Husqvarna Ab Handle arrangement for a power tool

Also Published As

Publication number Publication date
EP1986486A1 (en) 2008-11-05
EP1986486A4 (en) 2014-01-15

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