EP3197651A1 - Appareil de travail - Google Patents

Appareil de travail

Info

Publication number
EP3197651A1
EP3197651A1 EP15766398.0A EP15766398A EP3197651A1 EP 3197651 A1 EP3197651 A1 EP 3197651A1 EP 15766398 A EP15766398 A EP 15766398A EP 3197651 A1 EP3197651 A1 EP 3197651A1
Authority
EP
European Patent Office
Prior art keywords
adjusting member
guide rail
threaded portion
tool according
rotation
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP15766398.0A
Other languages
German (de)
English (en)
Other versions
EP3197651B1 (fr
Inventor
Benjamin FREY
Helmut Zimmermann
Klaus-Martin Uhl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
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 Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Publication of EP3197651A1 publication Critical patent/EP3197651A1/fr
Application granted granted Critical
Publication of EP3197651B1 publication Critical patent/EP3197651B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/14—Arrangements for stretching the chain saw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar

Definitions

  • the invention relates to a working device of the type specified in the preamble of claim 1.
  • the tensioning device comprises a rotatably mounted adjusting screw with a screw head and a screw shaft.
  • the screw shaft acts via a threaded connection on a fixed to the guide rail tendon.
  • a rotation of the adjusting screw causes via the threaded connection a longitudinal displacement of the guide rail, so that the saw chain is tensioned.
  • the operator has to apply a large amount of torque to the head of the screw. Due to the small diameter of the screw shaft, the transferable clamping forces are limited.
  • the invention has for its object to provide a working device of the generic type, which has a simple structure and allows the transmission of comparatively high clamping forces.
  • the greatest distance of the threaded portion of the adjusting member to the axis of rotation is at least as large as the largest distance of the actuating contour to the axis of rotation. Due to the comparatively large outer circumference of the threaded section with respect to the outer circumference of the actuating contour, large forces can be transmitted from the adjusting member to the clamping member. At the same time results in a simpler Structure, since no additional components are needed for the transmission of relatively high forces.
  • the at least one recess of the actuating contour of the Ver actuator interrupts the at least one thread of the adjusting at least partially.
  • the recess and the thread overlap accordingly at least partially.
  • the actuating contour extends over a longitudinal section of the adjusting member, and the thread of the adjusting member extends over the entire length of this longitudinal section. Due to the overlap of the actuating contour and the threaded portion in the longitudinal section of the adjusting element, a small overall length of the adjusting element can be achieved. This results in a compact design of the adjusting with a short length. Due to the compact design of the adjusting the adjusting member is easy, so that there is a weight saving of the implement.
  • the adjusting member has a base body with a cylindrical outer surface, and the actuating contour and the threaded portion each extend over the entire axial length of the base body of the adjusting member.
  • the adjusting member is constructed very compact, and yet the actuating contour and the threaded portion are formed as large as possible.
  • the actuating contour is formed by at least one, preferably by at least three, in particular by at least four grooves.
  • the longitudinal direction of the at least one groove of the actuating contour extends at an angle of at most about 40 ° relative to the axis of rotation of the adjusting member.
  • the longitudinal direction of the at least one groove of the actuating contour runs parallel to the axis of rotation of the adjusting member.
  • the flanks of the groove in an intersecting plane perpendicular to the axis of rotation of the adjusting member at an angle which is from about 60 ° to about 120 °, in particular from about 70 ° to about 110 °.
  • the implement comprises a sprocket cover on which the adjusting member is rotatably mounted, wherein the adjusting member is supported in the direction of the axis of rotation of the sprocket cover.
  • the adjusting member is held in the sprocket cover, and the sprocket cover can be easily assembled together with the adjusting member. Due to the fact that the adjusting member is mounted on the sprocket cover and not directly on the housing, the clamping force is derived via the sprocket cover into the housing.
  • the sprocket cover on an opening through which the main body of the adjusting member projects at least partially to the outside of the sprocket cover.
  • the sprocket cover advantageously has a recessed grip on at least one side of the opening extending parallel to the axis of rotation of the adjustment member. This makes the adjuster easily accessible to an operator. Through the opening also dirt that has deposited in the fixture, such as sawdust, emerge. The dirt is thereby promoted through the opening when turning the adjustment member.
  • the adjusting member on its front sides on bearing journals, which are held in recordings of the sprocket cover.
  • the journals are clipped into shots of the sprocket cover.
  • the bearing journals can also be held in a bearing shell formed on a bearing cover, wherein the bearing cover is secured to the sprocket cover.
  • the implement on an actuator for fixing the sprocket on the housing of the implement, which is disposed adjacent to the tensioning device on the sprocket cover.
  • This allows an operator, for example with one hand by turning the adjusting the chain, in particular saw chain, tension and fix after reaching the desired shegekettenwear the sprocket cover on the housing of the implement with the other hand by adjusting the actuator.
  • the tendon is disc-shaped and carries on a flat side of the threaded portion, wherein the threaded portion is formed by sections of adjacent threads.
  • the flat side carrying the threaded portion advantageously has a step extending transversely to the longitudinal central axis of the guide rail, the thickness of the tensioning member being reduced at the side of the step facing the fastening element.
  • the clamping member can be pushed into the region of the fastening element, so that there is a large clamping path of the clamping device with a small width of the saw.
  • the implement is compact and narrow, in particular in the transverse direction, ie in the direction of the axis of rotation of the drive shaft.
  • the actuator may be made comparatively large, so that an operator can operate the actuator easily and conveniently.
  • the outer diameter of the adjustment member is at least 15 mm, in particular at least 20 mm. Due to the comparatively large outer diameter, a large force is transferable from the adjusting member via the threaded portions on the clamping member. The adjusting member can apply high clamping forces even at low strength. Furthermore, due to the comparatively large outer diameter of the adjusting a large thread diameter allows, due to the large thread diameter, the stress of the thread flanks against a Ver actuator with smaller outer diameter and smaller thread diameter is smaller with the same load, so that the threaded portion of the Versteilglieds example, made of plastic can.
  • the clamping member has at least one pin which engages in an opening of the guide rail and thereby connects the clamping member in the direction of the longitudinal central axis of the guide rail form-fitting manner with the guide rail.
  • the threads of the threaded connection trapezoidal thread, wherein the flank angle of the trapezoidal thread from 0 ° to 60 °.
  • the threaded portion of the adjusting and the threaded portion of the clamping member made of plastic, in particular made of fiber-reinforced plastic.
  • the weight of the adjusting member and the weight of the tendon are comparatively small, so that the total weight of the working device is reduced.
  • the adjusting member and the clamping member are made entirely of plastic, in particular of fiber-reinforced plastic.
  • the implement is a chainsaw. It may also be expedient that the implement is a GeSteinschneider.
  • FIG. 2 shows an exploded perspective view of the actuating element, sprocket cover, clamping device and guide rail of the working device from FIG. 1
  • FIG. 3 shows a schematic sectional illustration through the chain wheel cover, the tensioning device, the actuating element and the guide rail,
  • FIG. 4 is a perspective view of the sprocket cover with adjustment member and actuator
  • 5 is a side view of the Kettemaddeckels, the adjusting member and the actuating element
  • 6 is a perspective view of the sprocket cover and the
  • FIG. 10 is a perspective view of the adjusting
  • Fig. 11 is a side view of the adjusting
  • Fig. 12 is a side view of the adjusting in the direction of arrow XII in
  • FIG. 13 is a side view of the adjusting member in the direction of the arrow XIII in Fig. 11,
  • FIG. 14 and 15 are perspective views of the tendon
  • Fig. 16 and 17 are side views of the tendon
  • Fig. 18 is a side view of the tendon in the direction of arrow XVIII in Fig. 16, Fig. 19 is a side view of the tendon in the direction of arrow XIX in
  • the power saw 1 shows an exemplary embodiment of a power tool, a power saw 1.
  • the power saw 1 includes a housing 6, in which a drive motor 52, for example, an internal combustion engine or an electric motor, is arranged. If the drive motor 52 as Formed electric motor, the electric motor can draw its energy via a battery, not shown.
  • the drive motor 52 drives a chain 5 via a drive shaft 2 and a drive pinion 3.
  • the chain 5 is designed as a saw chain.
  • a sprocket cover 10 is fixed to the housing 6.
  • the chain saw 1 comprises a guide rail 4. In operation, the chain 5 runs on the guide rail 4.
  • To guide the power saw 1 6 handles, namely a rear handle 7 and a handle tube 8 are fixed to the housing.
  • the power saw 1 has a tensioning device 15 shown in FIG. 2 for tensioning the chain 5.
  • the tensioning device 15 comprises a tensioning member 16 and an adjusting member 17.
  • the guide rail 4 is moved relative to the housing 6 in the direction of a longitudinal central axis 18 (FIG 1) of the guide rail 4 moves.
  • the clamping member 16 engages in a form-fitting manner in two circular openings 14 arranged on the guide rail 4, so that forces can be transmitted from the clamping member 16 to the guide rail 4, in particular in the direction of the longitudinal center axis 18 of the guide rail 4.
  • the guide rail 4 has a longitudinal slot 13 on the housing 6, a bolt 9 is fixed, which engages in the longitudinal slot 13.
  • the longitudinal slot 13 allows the movement of the guide rail 4 in the direction of the longitudinal center axis 18 of the guide rail 4.
  • an actuating element 11 which comprises a nut 12, screwed.
  • the sprocket cover 10 covers the tensioning device 15 and the drive sprocket 3.
  • the sprocket cover 10 is held on the housing 6 schematically shown in FIG. 3 via the actuating element 11 screwed onto the bolt 9.
  • the guide rail 4 is held clamped in the fixed state by the actuating element 11 between the sprocket 10 and the housing 6.
  • the adjusting member 17 is rotatably mounted in the sprocket 10 about a rotation axis 21.
  • the adjusting member 17 is connected via a threaded connection 20 with the clamping member 16. Due to the threaded connection 20 causes a rotation of the adjusting member 17 about its axis of rotation 21, a movement of the clamping member 16 in the direction of the longitudinal central axis 18 of the guide rail 4th
  • the adjusting member 17 has on its outer circumference a threaded portion 22 with four threads 23.
  • the clamping member 16 has a threaded portion 24.
  • the threaded portion 22 of the adjusting member 17 is provided for engagement in the threaded portion 24 of the clamping member 16, whereby the threaded connection 20 is formed.
  • the clamping member 16 moves in the direction of the longitudinal center axis 18 of the guide rail 4. Since the clamping member 16 is positively connected to the guide rail 4, the guide rail 4 together with the clamping member 16 in the direction of the longitudinal center axis 18th adjusted. This sets the tension of the chain 5.
  • the sprocket cover 10 has an opening 25 shown in FIGS. 5 and 8.
  • the adjusting member 17 shown in FIGS. 4 and 5 projects at least partially through the opening 25 to an outer side 26 of the sprocket cover 10, so that an operator can rotate the adjusting member 17 from the outside. So that the operator can simply turn the adjusting member 17, the sprocket cover 10 has a recessed grip 28 which extends on the sides 27 of the opening 25 running parallel to the axis of rotation 21 of the adjusting member 17.
  • an integrally formed with the sprocket 10 elevation 29 is provided in the region of the opening 25. As shown in FIG. 3, the elevation 29 bulges to the outside 26 of the sprocket cover 10 and closes in the region of the adjusting member 17 approximately flush with the adjusting member 17.
  • the elevation 29 and the Ver actuator 17 are at least partially in one plane.
  • the clamping member 16 has two pins 30. When installed, the pins 30 engage in the openings 14 of the guide rail 4 (FIG. 2) and thereby connect the clamping member 16 in the direction of the longitudinal center axis 18 (FIG. 1) of the guide rail 4 in a form-fitting manner with the guide rail 4.
  • On the clamping member 16 are guide elements 31 provided.
  • the hook-shaped guide elements 31 protrude when mounted guide rail 4 in the longitudinal slot 13 of the guide rail 4 (Fig. 2) and are located on the drive pinion 3 side facing the guide rail 4 on the guide rail 4 at.
  • a wall 33 is arranged on an inner side 32 of the sprocket cover 10.
  • the wall 33 delimits a channel in which the saw chain (Fig. 1) runs, to the outside. This largely prevents sawdust settle in the sprocket cover 7.
  • 10 shots 34 for rotatably supporting the adjustment member 17 are provided on the sprocket cover.
  • Each of the receptacles 34 is approximately semicircular.
  • In the receptacles 34 are arranged on the end faces of the adjusting member 17 bearing pin 35 (Fig. 3).
  • latching lugs 36 are provided on the receptacles 34, so that the cylindrical bearing pins 35 of the adjusting element 17 (FIG. 3) can be clipped into the receptacles 34 of the sprocket cover 10.
  • a bearing cover not shown, which has receptacles 34 for the locking lugs 36, and which is attached to the sprocket 10, for example screwed onto the sprocket 10, can be provided.
  • the adjusting member 17 has an actuating contour 39. An operator can rotate the adjusting member 17 on the actuating contour 39.
  • the actuating contour 39 comprises in the exemplary embodiment four depressions which interrupt the threads 23.
  • the wells are as
  • Each of the grooves 41 is bounded by two flanks 42 ( Figures 12 and 13).
  • the flanks 42 of the grooves 41 each include an angle ⁇ , which in the exemplary embodiment is about 90 °.
  • the angle ⁇ is advantageously in a range of about 60 ° to about 120 °, in particular from about 70 ° to about 110 °.
  • the longitudinal direction of the groove 41 runs parallel to the axis of rotation 21 (FIG. 10).
  • the longitudinal direction of the at least one groove 41 in side view of the adjusting member 17 at an angle to the rotational axis 21 of the adjustment member 17 extend, wherein the angle is advantageously at most 40 °.
  • the adjusting member 17 has a base body 44 with a cylindrical outer surface 45, wherein the cylindrical outer surface 45 is interrupted by the grooves 41 and the threads 23.
  • the actuating contour 39 extends over the entire axial length of the cylindrical base body 44 of the adjusting member 17.
  • the threaded portion 22 of the adjusting member 17 extends over the entire axial length of the main body 44 of the adjusting member 17.
  • the Grooves 41 and the threads 23 extend over only a portion of the axial length of the body 44 and advantageously only partially overlap in the axial direction.
  • the actuating contour 39 has a greatest distance a from the axis of rotation 21, which in the exemplary embodiment is exactly the same as the greatest distance b of the outer circumference of the threaded section 22 of the adjusting element 17 relative to the axis of rotation 21.
  • the outer diameter D of the adjusting element 17, which in the exemplary embodiment is identical to the outer diameter of the Outer circumference of the threaded portion 22 of the adjusting member 17 is advantageously at least 15 mm, in particular at least 20 mm.
  • the thread of the threaded portion 22 is formed as a trapezoidal thread 46, the flank angle ß is at most 60 °.
  • the thread of the threaded outlet 24 of the tensioning element 16 is formed as a trapezoidal thread 47 whose flank angle ⁇ (FIG. 14) is at most 60 °.
  • the threaded portion 22 of the adjusting member 17 ( Figures 10 to 13) and the threaded portion 24 of the clamping member 16 ( Figures 14 to 16) are made of plastic, in particular of fiber-reinforced plastic.
  • the adjusting member 17 and the clamping member 16 are made entirely of plastic.
  • the adjusting member 17 has a central bore 37.
  • the axis of the central bore 37 corresponds to the axis of rotation 21.
  • the central bore 37 penetrates the adjusting member 17 completely and serves as a weight reduction bore.
  • a plurality, namely four, channels 38 are formed, which extend parallel to the central bore 37 and the adjustment member 17 completely penetrate.
  • the channels 38 are provided for weight reduction.
  • the tendon 16 is formed flat.
  • Flat side 48 carries the clamping member 16, the threaded portion 24.
  • the threaded portion 24 is not formed by complete threads, but by sections of adjacent threads.
  • the clamping member 16 has on its flat side 48 a transverse to the longitudinal center axis 18 of the guide rail 4 (Fig. 3) and transversely to the plane of the guide rail 4 extending step 51.
  • the thickness d of the tendon 16 in a first portion 49 of the tendon 16 is smaller than the thickness e of the tendon 16 in a second portion 50 of the tendon 16.
  • the thicknesses d and e are perpendicular to the plane of the guide rail 4 measured.
  • the sections of the threads of the threaded portion 24 in the first portion 49 shallower sections of a complete thread than the Subsections of the threads in the second portion 50.
  • the portion 49 of reduced thickness d is the actuator 11 (Fig. 2) arranged facing, as shown in FIG. 3.
  • the clamping member 16 On the side facing away from the flat side 48, the clamping member 16 carries the pins 30 and the guide elements 31. As shown in FIG. 17, apertures 40 are formed in the portion 49 between adjacent threads. As a result, a very small thickness d can be achieved. At the same time 17 dirt can be promoted from the threads of the tendon 16 with a rotation of the adjusting member.
  • the clamping member 16 is a separate component. However, it may also be expedient that the clamping member 16 is formed as part of the guide rail 4.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention concerne un appareil de travail comprenant un rail de guidage (4) sur lequel une chaîne (5) est entraînée en rotation. L'appareil de travail comprend un dispositif tendeur (15) pour la chaîne (5). Le dispositif tendeur (15) comprend un élément de tension (16), qui agit sur le rail de guidage (4) en direction (19) d'un axe longitudinal médian (18) du rail de guidage (4). Le dispositif tendeur (15) comprend un élément de réglage (17) monté rotatif, qui est relié à l'élément de tension (16) par une liaison filetée (20). Une rotation de l'élément de réglage (17) autour de son axe de rotation (21) entraîne un déplacement de l'élément de tension (16) en direction (19) de l'axe longitudinal médian (18) du rail de guidage (4). L'élément de réglage (17) comprend sur sa périphérie extérieure une partie filetée (22) présentant au moins un filet (23) qui est destiné à être en contact avec au moins une partie filetée (24) de l'élément de tension (16). L'élément de réglage (17) présente un contour d'actionnement (39) qui permet à un utilisateur de tourner l'élément de réglage (17) et qui comporte au moins un creux. Le plus grand écart (b) entre la partie filetée (22) de l'élément de réglage (17) et l'axe de rotation (21) est au moins aussi grand que le plus grand écart (a) entre le contour d'actionnement (39) et l'axe de rotation (21).
EP15766398.0A 2014-09-26 2015-09-12 Appareil de travail Active EP3197651B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014014275.2A DE102014014275A1 (de) 2014-09-26 2014-09-26 Arbeitsgerät
PCT/EP2015/001833 WO2016045773A1 (fr) 2014-09-26 2015-09-12 Appareil de travail

Publications (2)

Publication Number Publication Date
EP3197651A1 true EP3197651A1 (fr) 2017-08-02
EP3197651B1 EP3197651B1 (fr) 2021-11-03

Family

ID=54148456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15766398.0A Active EP3197651B1 (fr) 2014-09-26 2015-09-12 Appareil de travail

Country Status (5)

Country Link
US (1) US10144146B2 (fr)
EP (1) EP3197651B1 (fr)
CN (1) CN107000241B (fr)
DE (1) DE102014014275A1 (fr)
WO (1) WO2016045773A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE543428C2 (en) 2019-06-24 2021-02-16 Husqvarna Ab A rotatable cutting chain work tool, a wall saw arrangement comprising such a work tool, an annular member and a method for producing an annular member
WO2022051468A1 (fr) 2020-09-04 2022-03-10 Milwaukee Electric Tool Corporation Scie à chaîne
US11673287B2 (en) * 2021-11-10 2023-06-13 Techtronic Cordless Gp Systems and methods of chainsaw tensioning

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382898A (en) * 1966-05-16 1968-05-14 Charles M. Walker Chain saw attachment
SE469825B (sv) * 1990-03-28 1993-09-27 Electrolux Ab Kedjespännanordning på motorsåg
SE511283C2 (sv) * 1997-06-04 1999-09-06 Sandvik Ab Sträckmekanism och sågsvärd för kedjesågar
US6049986A (en) * 1997-10-02 2000-04-18 Blount, Inc. Chain saw guide bar equipped with chain tensioner
DE19931249A1 (de) * 1999-07-07 2001-01-11 Bosch Gmbh Robert Kettensäge
JP2002036203A (ja) * 2000-07-24 2002-02-05 Ryobi Ltd ソーチェーン張り力調整装置
DE20118322U1 (de) * 2001-11-12 2002-01-17 Jenn Feng Industrial Co., Ltd., Ping Chang, Taoyuan Vorrichtung zur Einstellung der Spannung einer Kettensäge
SE0300611D0 (sv) * 2003-03-06 2003-03-06 Electrolux Ab Chain saw tensioning device
DE102004022170A1 (de) 2004-05-05 2006-01-12 Hans Einhell Ag Kettensäge
JP5314496B2 (ja) * 2009-05-20 2013-10-16 株式会社マキタ チェーンソー
CN204195612U (zh) * 2014-09-19 2015-03-11 国家电网公司 一种新型快速调节开口活动扳手

Also Published As

Publication number Publication date
US10144146B2 (en) 2018-12-04
EP3197651B1 (fr) 2021-11-03
DE102014014275A1 (de) 2016-03-31
WO2016045773A1 (fr) 2016-03-31
CN107000241A (zh) 2017-08-01
CN107000241B (zh) 2020-09-01
US20170266834A1 (en) 2017-09-21

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