WO2013178243A1 - Dispositif de transmission de rotation - Google Patents

Dispositif de transmission de rotation Download PDF

Info

Publication number
WO2013178243A1
WO2013178243A1 PCT/EP2012/059958 EP2012059958W WO2013178243A1 WO 2013178243 A1 WO2013178243 A1 WO 2013178243A1 EP 2012059958 W EP2012059958 W EP 2012059958W WO 2013178243 A1 WO2013178243 A1 WO 2013178243A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation transfer
transfer member
arrangement
motor
bearing
Prior art date
Application number
PCT/EP2012/059958
Other languages
English (en)
Inventor
Daniel KNOPF
Martin Breuninger
Martin Lugert
Original Assignee
Husqvarna Ab
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 Ab filed Critical Husqvarna Ab
Priority to DE112012006451.8T priority Critical patent/DE112012006451T5/de
Priority to PCT/EP2012/059958 priority patent/WO2013178243A1/fr
Publication of WO2013178243A1 publication Critical patent/WO2013178243A1/fr

Links

Classifications

    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/035—Gearboxes for gearing with endless flexible members

Definitions

  • This invention relates to a rotation transfer arrangement, such as may, non- exclusively, be used in power tools such as hedgetrimmers.
  • Hedgetrimmers and other power tools comprising a motor powering one or more driven elements
  • a motor powering one or more driven elements
  • a relatively high speed motor is used, with a gearbox used to reduce the speed of rotation but increase the torque felt at the driven elements.
  • a common arrangement is to have a pinion gear pressed onto the output shaft of the motor, engaging with a wheel gear mounted adjacent to the pinion gear.
  • One potential arrangement is to provide a bearing, such as a ball bearing, on the motor side of the point of transmission of force (the point of transmission of force being where the pinion gear and wheel gears mesh).
  • a bearing such as a ball bearing
  • the point of transmission of force being where the pinion gear and wheel gears mesh.
  • providing a bearing with low play at that point can lead to a static over- determination of the output shaft, which can lead to high power consumption and even breakage of the output shaft.
  • a rotation transfer arrangement comprising:
  • the arrangement further comprising a support member comprising a sleeve at least partly surrounding the first rotation transfer member and provided with an aperture through which the first rotation transfer member contacts the second rotation transfer member, the sleeve supporting the distal end of the first rotation transfer member.
  • the sleeve support the distal end of the first rotation transfer member, for the same level of deformation of the shaft, more play can be allowed for in the support member than would be the case if it were on the proximal side of the first rotation transfer member. Because a sleeve surrounding the first rotation transfer member is used to support the first rotation transfer member, less space is needed on the distal side of the first rotation transfer member.
  • the arrangement further comprises a torque-applying member coupled to the first end of the shaft.
  • the shaft may be clamped against radial movement by the torque applying member.
  • the torque-applying member will typically be a motor, but could also be a brake.
  • the first and second rotation transfer member will each comprise a gear; as such, the first rotation transfer member may comprise a pinion gear, and the second rotation transfer member may comprise a wheel gear meshing with the pinion gear, typically through the aperture.
  • the first and second rotation transfer members may be pulleys contacting one another through a belt passing through the aperture.
  • the sleeve may support the distal end of the first rotation transfer member through a bearing.
  • the bearing may comprise a friction bearing comprising a surface on which the first rotation transfer member rubs.
  • the bearing may only extend circumferentially around part of the distal end of the first rotation transfer member; the region where the bearing does not extend typically aligns with the aperture. The bearing can therefore be dispensed with in the region adjacent to the aperture, as the force from the second rotation transfer member on the pinion will largely be outwards away from the second rotation transfer member (at least in the case of the rotation transfer members comprising gears), and so little support will be needed on the side of the first rotation transfer member adjacent to the second rotation transfer member and so to the aperture.
  • the rotation transfer members comprise pulleys
  • the forces between the rotation transfer members will be reversed, and so the aperture may be provided on the side of the sleeve opposite to the second rotation transfer member.
  • the bearing may comprise a ball or roller bearing.
  • the arrangement may be provided with a housing supporting the shaft and the second rotation transfer member relative to one another, and typically also the torque- applying member.
  • the support member may be fixed to the housing, or to the torque- applying member.
  • the first rotation transfer member may be pressed onto the shaft or otherwise fixed thereon; it may be formed as part of the shaft.
  • the aperture may extend circumferentially only around a portion of the first rotation transfer member; typically, the angle of the aperture which is open will be around 90 to 180 degrees.
  • the aperture may typically have a thickness along an axis of the shaft at least as thick as the second rotation transfer member.
  • the sleeve will generally be of cylindrical form.
  • the motor will be an electric motor.
  • the arrangement will preferably be for a handheld power tool, such as a hedgetrimmer.
  • a support member for a first rotation transfer member comprising a cylindrical sleeve having an internal bore with an aperture therein to allow access by a second rotation transfer member to a first rotation transfer member, the internal bore having a first end and a second end, the second end having a bearing for an end of the first rotation transfer member.
  • the first end will be larger in diameter than the second end.
  • the support may have any of the optional features recited with reference to the first aspect of the invention.
  • an electric power tool comprising a housing and a rotation transfer arrangement according to the first aspect of the invention within the housing, having a motor as the torque-applying member.
  • the support member will be fixed relative to the motor or the housing, typically at a point closer to the motor than the distal end of the first rotation transfer member.
  • Such a tool will allow for the space at the distal end of the first rotation transfer member to be used more efficiently, whilst still allowing the distal end of the first rotation transfer member to be supported.
  • the power tool will be a hedgetrimmer, drilling machine, cordless screwdriver, chainsaw, trimmer, grass shear, blower, lawn mower or water pump.
  • Figure 1 shows a side elevation of a motor arrangement for use in a hedgetrimmer in accordance with a first embodiment of the invention
  • Figure 2 shows a perspective view of a support member used in the motor arrangement of Figure 1 ;
  • Figure 3 shows a cross section through the motor arrangement of Figure 1 ;
  • Figure 4 shows an exploded perspective view of the motor arrangement of Figure 1 in a hedgetrimmer
  • Figure 5 shows a partial cross section through a motor arrangement according to a second embodiment of the invention
  • Figure 6 shows a perspective view of the motor arrangement of Figure 5;
  • Figure 7 shows a cross section through a motor arrangement according to a third embodiment of the invention.
  • FIG 8 shows a perspective view of the motor arrangement of Figure 7.
  • a rotation transfer arrangement in accordance with a first embodiment of the invention is shown in Figures 1 to 5 of the accompanying drawings.
  • the arrangement comprises a motor 1 having an output shaft 2. On the output shaft 2 is pressed a first rotation transfer member of the form of a pinion gear 3.
  • the pinion gear 3 engages a second rotation transfer member of the form of a wheel gear 4 rotatably mounted on a drive shaft 5 parallel to the output shaft 2.
  • the wheel gear 4 is larger in diameter than the pinion gear 3
  • the drive shaft 5 will rotate at a lower speed than the output shaft 2 of the motor; this rotation can be put to whatever use is desired.
  • the pinion gear 3 is pressed onto the output shaft 2 of the motor 1.
  • a support member 6 is provided in order to support the pinion gear 3, a support member 6 is provided.
  • This comprises a cylindrical sleeve 7 having an internal bore 8 in which the pinion gear 3 fits.
  • the sleeve 7 has an aperture 9 formed therein to enable the wheel gear 4 to engage the pinion gear 3 when the pinion gear 3 is received within the bore 8.
  • the sleeve 7 terminates in a section of reduced internal diameter 10. The diameter reduces to match that of the peg 12.
  • the peg 12 is supported in this section 10, and can rub against bearing surface 13, which forms a friction bearing. The positioning of the peg 12 in the section 10 therefore provides support for the pinion gear 3 against both radial and tangential forces applied by the wheel gear 4.
  • the support for the pinion gear 3 is at the distal end 1 1 of the pinion gear 3, the support member is close to the wheel gear 4 but as far as possible from the motor 1. This means that, in order to provide a given limited bending deformation of the output shaft 2, a larger play can be allowed at the support of the pinion gear 3 at section 10 of the support 6 than if the bearing were to be located on the motor side of the point of transmission of force.
  • the support member 6 also has a collar 14 which is wider than the sleeve 7. As shown in Figure 4 of the accompanying drawings, this collar also fits over the pinion gear 3, but is received within a housing 15 of the apparatus in which the motor arrangement is used; here, the apparatus is a hedgetrimmer.
  • the collar 14 is a press fit within a corresponding recess 16 in the housing 15, although the collar 14 could equally well be screwed, bolted or otherwise fixed to the housing 15 in any convenient way. Given that the housing 15 also supports the motor and the wheel gear, all of the components will be suitably supported relative to one another.
  • a motor arrangement according to a second embodiment of the invention is shown in Figures 5 and 6 of the accompanying drawings.
  • equivalent integers to those of the first embodiment have been given corresponding reference numerals, raised by 50.
  • the first rotation transfer member 53 mounted on the output shaft 52 comprises a first pulley 53a
  • the second rotation transfer member 54 comprises a second pulley 54a.
  • a belt 70 connects the first and second pulleys 53, 54 so that rotational motion of the first pulley 53a drives the belt 70 so as to drive the second pulley 54a.
  • a sleeve 57 is provided over the first rotation transfer member 53, mounted on housing 65.
  • the sleeve has an aperture 59 through which the belt 70 engages the first pulley.
  • the sleeve 59 also has a recess 60 providing location for a peg 62 formed in the end of the first rotation transfer member 53 distal from the motor 51.
  • the peg can rub against bearing surface 63, which forms a friction bearing.
  • the positioning of the peg 72 in the recess 60 therefore provides support for the first rotation transfer member 53 against both radial and tangential forces applied by the belt 70 at a point as far from the motor 51 as possible.
  • the aperture 59 is on the opposite side of the first rotation transfer member 53 to the second rotation transfer member 54. This is because that is where the belt 70 will engage the first pulley 53a.
  • the aperture 89 it is possible for the aperture 89 to be on the side of the first rotation transfer member 53 directed towards the second rotation transfer member 54, but for the belt 100 still to contact the first pulley on the far side thereof.
  • the radial forces acting on the first and second rotation transfer members 53, 54; 83, 84 will tend to bias the rotation transfer members 53, 54; 83, 84 together (as the belt 70; 100 will be in tension), whereas in the first embodiment the radial forces on the first and second rotation transfer members 3, 4 will tend to bias those members apart.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention porte sur un dispositif de transmission de rotation, tel qu'un dispositif qui pourrait être utilisé avec un outil électrique tel qu'un taille-haie, comprenant : un arbre (2) porté à une première extrémité, typiquement par un élément d'application de couple tel qu'un moteur (1) qui y est accouplé ; un premier élément de transmission de rotation tel qu'un pignon (3) sur l'arbre (2) ; un second élément de transmission de rotation tel qu'une roue dentée (4) s'accouplant au premier élément de transmission de rotation (3), le premier élément de transmission de rotation (3) ayant une extrémité distale (11) qui est distale par rapport à la première extrémité de l'arbre (2), le dispositif comprenant en outre un élément de support (6) comprenant un manchon (7) qui entoure au moins partiellement le premier élément de transmission de rotation (3) et est muni d'une ouverture (9) à travers laquelle le premier élément de transmission de rotation (3) entre en contact avec le second élément de transmission de rotation (4), le manchon (7) portant l'extrémité distale (11) du premier élément de transmission de rotation (3).
PCT/EP2012/059958 2012-05-29 2012-05-29 Dispositif de transmission de rotation WO2013178243A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112012006451.8T DE112012006451T5 (de) 2012-05-29 2012-05-29 Rotationsübertragungsanordnung
PCT/EP2012/059958 WO2013178243A1 (fr) 2012-05-29 2012-05-29 Dispositif de transmission de rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/059958 WO2013178243A1 (fr) 2012-05-29 2012-05-29 Dispositif de transmission de rotation

Publications (1)

Publication Number Publication Date
WO2013178243A1 true WO2013178243A1 (fr) 2013-12-05

Family

ID=46178550

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/059958 WO2013178243A1 (fr) 2012-05-29 2012-05-29 Dispositif de transmission de rotation

Country Status (2)

Country Link
DE (1) DE112012006451T5 (fr)
WO (1) WO2013178243A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107567851A (zh) * 2017-08-25 2018-01-12 天津迈克重工有限公司 一种球形绿篱自动修剪装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008031795A1 (fr) * 2006-09-11 2008-03-20 Continental Automotive Gmbh Servomoteur
EP1931895B1 (fr) * 2005-09-28 2008-12-10 Robert Bosch Gmbh Unite de transmission et d'entrainement a fixation de palier sans jeu axial, utilisee notamment pour deplacer une partie mobile dans une automobile
CN202017570U (zh) * 2011-05-05 2011-10-26 铁法煤业（集团）有限责任公司煤层气开发利用分公司 一种内燃机启动传动装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1931895B1 (fr) * 2005-09-28 2008-12-10 Robert Bosch Gmbh Unite de transmission et d'entrainement a fixation de palier sans jeu axial, utilisee notamment pour deplacer une partie mobile dans une automobile
WO2008031795A1 (fr) * 2006-09-11 2008-03-20 Continental Automotive Gmbh Servomoteur
CN202017570U (zh) * 2011-05-05 2011-10-26 铁法煤业（集团）有限责任公司煤层气开发利用分公司 一种内燃机启动传动装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107567851A (zh) * 2017-08-25 2018-01-12 天津迈克重工有限公司 一种球形绿篱自动修剪装置
CN107567851B (zh) * 2017-08-25 2023-09-19 天津迈克重工有限公司 一种球形绿篱自动修剪装置

Also Published As

Publication number Publication date
DE112012006451T5 (de) 2015-03-05

Similar Documents

Publication Publication Date Title
US8152601B2 (en) Motor-driven machine tool
ATE368542T1 (de) Winkelvorsatz für eine bohrmaschine
EP1433688A3 (fr) Direction assistée entraínée par un moteur
SE533039C2 (sv) Handhållen tigersåg
FR2889866A1 (fr) Variateur de vitesse a courroie et engin automoteur a vitesse d'avancement variable equipe d'un tel variateur
US7346992B2 (en) Hand-held power tool with angle drive
US20140190285A1 (en) Oscillatingly Driven Power Tools With Toothed Belt Drive
US20050009659A1 (en) Gearbox for gardening machine
US20150128429A1 (en) Power Tool and Transmission Thereof
US20020053140A1 (en) Eccentric drive including an eccentric drive for a portable handheld work apparatus
WO2013178243A1 (fr) Dispositif de transmission de rotation
EP1577584A3 (fr) Dispositif de transmission de force et méthode pour l'assembler et voiture munie du dispositif
US20060096413A1 (en) Conveyor drive including a fluid coupling and a step-up gearbox
EP3383571B1 (fr) Scie plate à haute puissance comprenant un entraînement d'arbre de lame
EP2439022B1 (fr) Outil électrique à transmission bidirectionnelle
WO2003030296A3 (fr) Rotor pour pompe a palettes
EP1526300A3 (fr) Mécanisme de transmission de puissance
US6026909A (en) Power tool
CN100393489C (zh) 用于杆锯的装置
US20080153605A1 (en) Buffer adapter for transmitting rotary motion
WO2010027120A1 (fr) Scie portative
FR3110939B1 (fr) Turbomachine equipee de machines electriques accouplees a une surface d’accouplement
JP5245698B2 (ja) 刈込機
US20230415322A1 (en) Multi-speed automatic transmission for a power tool
JP5002618B2 (ja) 流体継手及び除雪機

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12724333

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 112012006451

Country of ref document: DE

Ref document number: 1120120064518

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12724333

Country of ref document: EP

Kind code of ref document: A1