EP2666603B1 - Motorkettensäge mit einer Förderpumpe - Google Patents

Motorkettensäge mit einer Förderpumpe Download PDF

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Publication number
EP2666603B1
EP2666603B1 EP13002389.8A EP13002389A EP2666603B1 EP 2666603 B1 EP2666603 B1 EP 2666603B1 EP 13002389 A EP13002389 A EP 13002389A EP 2666603 B1 EP2666603 B1 EP 2666603B1
Authority
EP
European Patent Office
Prior art keywords
sprocket
drivers
chain
motorised
drive
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.)
Active
Application number
EP13002389.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2666603A1 (de
Inventor
Bernd Engel
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 EP2666603A1 publication Critical patent/EP2666603A1/de
Application granted granted Critical
Publication of EP2666603B1 publication Critical patent/EP2666603B1/de
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Anticipated expiration legal-status Critical

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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
    • B27B17/12—Lubricating devices specially designed for chain saws
    • 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
    • B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw

Definitions

  • the invention relates to a motor chain saw according to the preamble of claim 1, such a motor chain saw is in WO 2011/098097 disclosed.
  • the pump drive of the feed pump consists of a first drive wheel connected to the feed pump and a second drive wheel connected to the sprocket, which are in drive connection with one another.
  • the second drive wheel is designed as a worm wheel on a drive element which engages over the sprocket with a coupling section in such a way that it is in a form-locking drive connection with the sprocket.
  • the coupling portion has for this purpose on the circumference of a plurality of drivers, which are associated with driving surfaces formed on the sprocket. In this case, all drivers engage between two teeth of the driving sprocket and are in driving connection with this.
  • the sprocket must be replaced according to the type of saw chain used to ensure the shape and pitch of the saw chain adapted drive connection with the sprocket. If the geometry of the sprocket is changed, the drive element to the feed pump must be replaced, since the coupling portion is formed in each case according to the geometry of the sprocket used.
  • the invention has for its object to simplify the structure of the drive connection between a sprocket and a drive element for driving a feed pump.
  • a plurality of first driver are formed, which are associated with a first sprocket first geometry; in the same coupling portion of the same drive element a plurality of second drivers are formed, which are associated with the second sprocket of a second geometry.
  • the first geometry is different from the second geometry.
  • the first geometry differs from the second geometry z.
  • the drivers are arranged such that the coupling portion rests with the first or second drivers on the respectively associated first or second driving surfaces of the driving first or second sprocket.
  • the same drive element for multiple sprockets of different geometry can be used, so that when replacing the shegekettengarnitur usually the drive element does not need to be replaced. This simplifies the replacement of a shegekettengarnitur in a motorized chainsaw.
  • the driver surface is preferably formed on a chain tooth itself, so that no special engagement means on the sprocket itself are necessary.
  • the driver overlaps the sprocket tooth over a partial width axially, wherein the partial width is smaller than 30% of the total width of the sprocket tooth. This size of the driving surface is sufficient for a pump drive.
  • two first drivers and two second drivers each form a driver pair, wherein a driver pair in the circumferential direction - so in both directions of rotation of the sprocket - each defines a receptacle for an associated sprocket of the first and second sprocket.
  • the training is advantageously provided such that in the circumferential direction of the drive element alternately a first driver pair and a second driver pair successive.
  • the first receptacles provided in the coupling section relative to the axis of rotation of the drive element are diametrically opposed to one another and the second receptacles each lie diametrically opposite one another. This allows an arrangement of the driver to an axial plane of the drive element carried out such that they are symmetrical to this axial plane.
  • a first receptacle formed by first drivers is formed in the circumferential direction of the drive element with a smaller extent than the extension of a second receptacle formed by second drivers.
  • the first receptacle has a smaller extent in the circumferential direction than the second receptacle.
  • the empty distance between the driver pairs in the circumferential direction of the drive element is at least twice as large as the maximum extent of a receptacle in the circumferential direction.
  • a sprocket of a driving sprocket is held in the circumferential direction of the drive element in the associated receptacle of a pair of carriers with such tolerance that easy manufacturing and assembly of the drive element is ensured on the sprocket. It may be appropriate to keep the driving sprocket in the receptacle substantially free of play. It is advantageous if adjacent in the direction of rotation of the sprocket over the circumference of the coupling portion adjacent, driving chain teeth on first and second drivers, wherein one of the driving chain teeth is held in each case in the associated receptacle of a driver pair.
  • the inventive design of the positive drive connection from the pushed onto the existing metal sprocket, consisting of plastic drive element is thus designed so that - regardless of the geometric design of the recorded in the drive connection sprocket - only a subset of the sprockets of the driving sprocket with the drivers be in drive connection. It is advantageous that the drivers lie with radial play to the tooth base between two chain teeth. Due to the different geometry of the sprockets used, the drive element facing connection contour of the sprocket in shape, shape and / or geometry is different; Despite the different connection diagrams of the connection contour of the sprocket can be used according to the invention the same drive element for the pump drive.
  • a portable, hand-guided implement is shown using the example of a motor chain saw 1.
  • the motor chain saw 1 consists essentially of a drive motor 2, which is an internal combustion engine in the illustrated embodiment, in particular a two-stroke internal combustion engine. As a drive motor and electric motors are used.
  • the drive motor 2 is mounted in a housing 3, which extends in the longitudinal direction 23 (FIG. Fig. 2 ) of the housing 3 extending rear handle 4 with operating elements 5, 6 for the drive motor.
  • a front handle 7 extends transversely to the longitudinal direction 23 of the motor chain saw 1 via the housing 3; in front of this front, provided on the top of the housing 3 handle 7 a hand guard 8 is pivotally mounted, which serves to trigger a safety brake device 9.
  • the safety brake device 9 is received in a removable sprocket 10, into which a clutch drum 11 of a centrifugal clutch 12 protrudes.
  • the clutch drum 11 With the clutch drum 11 rotatably connected to a sprocket 16, which in perspective z. In Fig. 9 is shown.
  • the sprocket 16 is - together with the clutch drum 11 - rotatably mounted with a bearing 17 on the drive shaft 13.
  • the end 14 of the drive shaft 13 extends through the bearing 17 and carries at the protruding end 14 the carrier of the coupling elements 15th
  • the sprocket 16 has circumferentially successive sprockets 18 which engage drivingly in a saw chain 19 and driving them on a guide rail 20 circumferentially.
  • To guide the saw chain 19 is in the peripheral edge of the guide rail 20 has a circumferential groove 21 (FIG. Fig. 2 ) educated.
  • the guide rail 20 is held clamped by the clamping bolt 22 between the housing 3 and the sprocket 10.
  • the guide rail 20 extends in the longitudinal direction 23 of the implement.
  • a feed pump 30 For lubricating the circulating on the guide rail 20 saw chain 19 of the circumferential groove 21 chain oil is supplied via a feed pump 30, as in Fig. 3 is shown in partial section.
  • the feed pump 30 is driven by a pump drive 25 which is in drive connection with the sprocket 16.
  • the feed pump 30 consists of a delivery cylinder 31, in which a delivery piston 32 is immersed.
  • the delivery piston 32 is driven in rotation, for which purpose on the piston rod 33, a first drive wheel 34 is provided, which is designed as a pinion 35.
  • the free end 36 of the piston rod is supported on a housing-fixed lifting pin 37, which cooperates with a formed on the end of the piston rod 33 lifting cam.
  • a - schematically indicated - spring 38 of the lifting cam is held at the end 36 in contact with the lifting pin 37.
  • the feed pump 30 is driven by the output side of the centrifugal clutch 12, for which purpose a drive element 40 is provided in the embodiment, which in the FIGS. 5 to 7 is shown.
  • the drive member 40 is substantially formed as a cylindrical sleeve with a formed at one end disc-annular collar 42.
  • the outer diameter 43 of the collar 42 is formed larger than the outer diameter 24 of the sprocket 16 (FIG. Fig. 8 ).
  • the feed pump 30 is below the drive shaft 13, wherein the drive shaft 13 extends through the drive member 40.
  • the drive element 40 is rotatably mounted on the drive shaft 13 by means of a bearing 44, preferably a slide bearing.
  • the cylindrical bushing 41 is formed on its outer circumference as a second drive wheel 39, namely as a worm wheel 45 which -. also Fig. 4 - With the pinion 35 of the feed pump 30 meshes.
  • the provided at one end of the sleeve 41 collar 42 is facing the sprocket 16 with its front side.
  • On the sprocket 16 facing end of the collar 42 is formed as a coupling portion 50.
  • the collar 42 carries on the front side axially projecting drivers 46, 47, 48 and 49.
  • at least two first drivers 46 and 48 and two second drivers 47 and 49 are provided in the circumferential direction 51 of the drive element 40 on the front side.
  • the drivers have in axial front view U-shaped to V-shaped basic shape and are arranged on a common circumferential circle 52.
  • the drivers protrude from the circumferential circle 52 with their tips 53 radially to the axis of rotation 54; in each case two first drivers 46, 48 and two second drivers 47, 49 lie diametrically opposite one another with respect to the axis of rotation 54.
  • a first receptacle 56 is formed between each two first drivers 46 and 48 and a second receptacle 57 is formed between the second drivers 47 and 49.
  • the receptacles 56 and 57 are provided for receiving a sprocket tooth 18 of a arranged on the clutch drum 11 sprocket 16.
  • a first driver pair 86 and a second driver pair 87 are alternately provided in the exemplary embodiment, which alternately follow each other.
  • the coupling portion 50 thus has two first receptacles 56 which are diametrically opposed to each other with respect to the axis of rotation 54 and two second receptacles 57 which lie diametrically opposite one another in a corresponding manner relative to the axis of rotation 54.
  • the arrangement is such that the drivers 46, 48 and 47, 49 or the driver pairs 86, 87 are symmetrical to an axial plane 55, 58.
  • the axial plane 55 lies perpendicular to the axial plane 58.
  • the design of the drive element 40 or its coupling portion 50 is made such that the receptacle 56 formed by the first drivers 46, 48 has a greater extension 60 in the circumferential direction 51 than the extension 61, which is at the same radius R in the second receptacle 57 between the two second drivers 47, 49 results.
  • the measured in the circumferential direction 51 of the drive member 40 Leerabstand 59 between a first pair of carriers 86 of first drivers 46, 48 and a second driver pair 87 of second drivers 47, 49 is greater than that between the drivers 46, 48; 47, 49 measured extent 60, 61 of the receptacles 56, 57.
  • the empty distance 59 is at least twice as large as the maximum extent 60 of a receptacle 56th
  • the inventive design of the drive element 40 with the trained in a specific way coupling portion 50 allows a drive connection geometrically differently designed sprockets with the drive element 40 of the feed pump 30.
  • the inventively designed coupling portion 50 allows for geometrically different design sprockets (number of sprockets, pitch of the sprocket teeth) each form-fitting drive connection from the sprocket to the drive element 40 and thus to the feed pump 30th
  • a first sprocket 16 is shown, which has six evenly distributed over the circumference of the chain teeth 18.
  • the drive connection in the circumferential direction 51 of the sprocket 16 with the coupling portion 50 of the drive member 40 is achieved in that two teeth 18.1 and 18.4 are received in the first receptacles 56, which are bounded by the first driver 46 and 48.
  • the first sprocket 16 is held with its teeth 18.1 and 18.4 in the associated receptacle 56 of the first cam pair 86 substantially free of play. Due to the in Fig.
  • the first sprocket 16 is not only fixed in the first receptacles 56, but also to the following in the circumferential direction 51 on the first receptacle 56 second drivers 47 and 49 is present.
  • the chain tooth 18.2 or 18.6 lying on the first receptacle 56 at an empty spacing 59 is therefore located outside the second receptacle 57 against contact surfaces 67 of the second drivers 47 and 49.
  • the drivers 46, 47, 48, 49 engage over the chain teeth 18 axially such that each formed on the chain teeth 18 driving surfaces 70 and 71 at the respectively associated first and second drivers 46th , 48 and 47, 49 are present.
  • Fig. 9 shows a driver 46, 47, 48 and 49 axially over a partial width T the sprocket tooth 18, wherein the partial width T is preferably less than 30% of the total width G of the sprocket 18.
  • a sprocket 116 or 216 which has eight teeth 118 and 218, respectively.
  • the second sprocket 116 thus differs from the first sprocket 16 by a different number of teeth; the first sprocket has six sprockets 18.1 to 18.6, while the second sprocket has eight teeth 118.1 to 118.8.
  • this is the same drive element 40 in the same manner in the circumferential direction 51 positively coupled to the sprocket 116, as well as the perspective view in Fig. 11 shows.
  • driving surfaces 70 and 71 of the chain teeth 118.1 to 118.8 on associated drivers are also in the second sprocket; with first cam surfaces 70 is a sprocket 118.1, 118.5 on the drivers 47 and 49 within the second receptacle 57 at; with second cam surfaces 71 are the one received in the receptacle 58 sprocket 118.1 adjacent sprockets 118.8 and 118.2 with cam surfaces 71 on the first drivers 46 and 48 at.
  • a sprocket 118.1 or 118.5 of the driving second sprocket 116 is held in the circumferential direction 51 of the drive element 40 in the associated second receptacles 57 of a driver pair 87, held substantially free of play.
  • the sprocket 216 of FIGS. 12 and 13 differs from the sprocket 116 after the FIGS. 10 and 11 by a different pitch with the same number of sprockets 218.
  • This third sprocket is positively held by the coupling portion 50 of the same drive element 40 in the circumferential direction 51, ie in both directions, wherein a same position of the sprocket teeth 218.1 and 218.5 is given in the second receptacle 57 as in Fig. 10 ,
  • the arrangement is substantially the same; because of the other division, the drivers 46 to 49 are with their tips 53 with greater radial clearance S to the tooth base 72 between two chain teeth 218th
  • the radial clearance S to the tooth base 72 is in the embodiment according to Fig. 10 lower at the second sprocket 116; at the first sprocket 16, the clearance S to the tooth base is greater. It is essential that the first, second and third sprocket 16, 116, 216 each lie with a minimal clearance S to the tooth base 72 in the coupling portion 50.
  • a coupling between the plastic-made drive member 40 and a metal sprocket 16, 116, 216 is provided in the drive connection between the drive member 40 and one of the sprockets 16, 116, 216.
  • the drive element 40 engages over the sprocket 16, 116, 216 axially.
  • drivers 46, 47, 48, 49 are drivers 46, 47, 48, 49 between the chain teeth 18, 118, 218 of a sprocket 16, 116, 216, whereby in the direction of rotation 51, a driving positive engagement is achieved.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Gears, Cams (AREA)
  • Sawing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Rotary Pumps (AREA)
EP13002389.8A 2012-05-22 2013-05-04 Motorkettensäge mit einer Förderpumpe Active EP2666603B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012009997A DE102012009997A1 (de) 2012-05-22 2012-05-22 "Motorkettensäge mit einer Förderpumpe"

Publications (2)

Publication Number Publication Date
EP2666603A1 EP2666603A1 (de) 2013-11-27
EP2666603B1 true EP2666603B1 (de) 2015-04-08

Family

ID=48366097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13002389.8A Active EP2666603B1 (de) 2012-05-22 2013-05-04 Motorkettensäge mit einer Förderpumpe

Country Status (7)

Country Link
US (1) US9731431B2 (ja)
EP (1) EP2666603B1 (ja)
JP (1) JP6186172B2 (ja)
CN (1) CN103418841B (ja)
DE (1) DE102012009997A1 (ja)
ES (1) ES2541763T3 (ja)
RU (1) RU2623620C2 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD790303S1 (en) * 2015-08-06 2017-06-27 Andreas Stihl Ag & Co. Kg Cordless chainsaw
USD937646S1 (en) * 2019-02-28 2021-12-07 Husqvarna Ab Chainsaw
JP1657047S (ja) * 2019-04-24 2020-04-13
JP1657086S (ja) * 2019-04-24 2020-04-13

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409775A (en) * 1942-03-24 1946-10-22 Mall Arthur William Chain-saw machine
US3099924A (en) * 1961-10-18 1963-08-06 Marine Associates Inc Sprocket for chain saws
US3962929A (en) * 1972-11-24 1976-06-15 Omark Industries, Inc. Drive sprocket for chain saw
US4140209A (en) 1973-10-25 1979-02-20 Andreas Stihl Maschinenfabrik Motor saw, especially motor chain saw
DE2353479A1 (de) * 1973-10-25 1975-04-30 Stihl Maschf Andreas Motorsaege, insbesondere motorkettensaege
CA1122817A (en) * 1979-11-14 1982-05-04 Dennis G. Scott-Jackson Sprocket and clutch drum assembly
US4776826A (en) * 1988-03-14 1988-10-11 Blount, Inc. Chain saw drive sprocket with wear mark indicators
US4893407A (en) * 1989-05-30 1990-01-16 Blount, Inc. Integral dust cover and pump drive
DE9203378U1 (de) * 1992-03-13 1992-04-23 Dolmar GmbH, 2000 Hamburg Ölpumpe, insbesondere für eine Kettensäge
JP3138903B2 (ja) * 1994-07-15 2001-02-26 株式会社丸山製作所 枝打機
SE516027C2 (sv) * 1998-03-26 2001-11-12 Electrolux Ab Pumpanordning vid kedjesmörjning
US7044025B2 (en) * 2004-09-27 2006-05-16 Blount, Inc. Rim sprocket for chain saw
DE102008059840A1 (de) 2008-12-01 2010-06-02 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät und Verfahren zu dessen Herstellung
CN102741024B (zh) * 2010-02-11 2016-01-20 胡斯华纳有限公司 具有无刷电机的电池驱动的电动工具
DE102010033489A1 (de) * 2010-08-05 2012-02-09 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät
CN202045687U (zh) * 2011-01-11 2011-11-23 浙江亚特电器有限公司 一种电链锯的刹车结构
CN102166765B (zh) * 2011-01-29 2013-06-12 浙江亚特电器有限公司 一种链锯用油泵

Also Published As

Publication number Publication date
EP2666603A1 (de) 2013-11-27
JP2013241010A (ja) 2013-12-05
US20130312267A1 (en) 2013-11-28
DE102012009997A1 (de) 2013-11-28
JP6186172B2 (ja) 2017-08-23
CN103418841B (zh) 2017-08-25
RU2013122423A (ru) 2014-11-27
ES2541763T3 (es) 2015-07-24
US9731431B2 (en) 2017-08-15
RU2623620C2 (ru) 2017-06-28
CN103418841A (zh) 2013-12-04

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