EP1112155B1 - Kettensäge mit einer mit überrastkupplung versehenen kettenspannvorrichtung - Google Patents
Kettensäge mit einer mit überrastkupplung versehenen kettenspannvorrichtung Download PDFInfo
- Publication number
- EP1112155B1 EP1112155B1 EP00949087A EP00949087A EP1112155B1 EP 1112155 B1 EP1112155 B1 EP 1112155B1 EP 00949087 A EP00949087 A EP 00949087A EP 00949087 A EP00949087 A EP 00949087A EP 1112155 B1 EP1112155 B1 EP 1112155B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chain
- eccentric
- clamping sleeve
- housing
- rotary
- 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.)
- Expired - Lifetime
Links
Images
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
- B27B17/142—Arrangements for stretching the chain saw with adjustment by at least one cam
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/687—By tool reciprocable along elongated edge
- Y10T83/7015—Having uniplanar compound motion
- Y10T83/7025—Constantly oriented tool travelling in orbit
Definitions
- the invention relates to a chainsaw in the preamble of Claim 1 defined genus.
- the chainsaw according to the invention with the features of Claim 1 has the advantage that through the locking clutch always a chain tension that is independent of the user is fixed at the factory, is set and thus the user is not faced with the problem of whether the of chain tension set to him emotionally also for a optimal work with the chainsaw correct chain tension is.
- the chain tensioning device can be used without tools Be operated by hand, which is why only one Rotational movement and no other axial displacements of the Schwerts needs.
- An automatic release of the Chain tensioner with the consequence of decreasing Chain tension while working with the chainsaw can reliably excluded by a simple additional measure become.
- the eccentric rotatable and axially immovable on Rotary member mounted, and the locking clutch has one the eccentric non-rotatably connected, provided with locking elements first clutch disc and one rotatably with the rotating member connected second connected with locking elements Clutch disc and a preloaded clutch spring, the two with each other with their locking elements engaging clutch discs axially pressed together.
- the locking clutch in technically very simple and realized by the as Compression spring trained clutch spring can Adjust the locking force and thus the chain tension.
- this is Rotary member designed as an adapter sleeve with a Internal thread section on an external thread section of a the stud held in the housing is screwed on.
- a rotary knob non-rotatable, preferably form-fitting, attached is to the Pressing the adapter sleeve.
- the adapter sleeve overlaps the elongated hole and by screwing onto the stud bolt onto the sword presses so that this after tensioning the chainsaw is fixed immovably on the housing. That leaves the set chain tension during operation of the Chainsaw reliably received.
- the sprocket and the chain tensioner from one on Covered protective cap through which the Extends through the clamping sleeve, and the non-rotatable on the clamping sleeve attached rotary knob rotatably guided in the protective hood.
- the stop on the sword to support the eccentric as a Clamping piece formed on the one hand with a pin in a hole in the sword is positively inserted and on the other hand with a shaped element in the slot of the sword lies positively on the side and preferably on that of Sprocket is facing away from the hole end of the slot.
- the chain saw has a housing 10 in which a chain wheel 11 for driving a saw chain 12 is rotatably mounted.
- the Sprocket 11 is via a gear, not shown here powered by a combustion or electric motor and with his teeth hooked into the saw chain 12.
- the saw chain 12 is on a sword 13 protruding from the housing 10 all the way along the edge of the sword.
- a saw chain tension is the sword 13 on the housing 10 kept longitudinally displaceable so that the distance between Sword 13 and sprocket 11 changed and thereby the Saw chain 12 can be tensioned more or less.
- a chain tensioning device 14 For tensioning the saw chain 12 and fixing the sword 13 in a chain tension maintaining the set Position on the housing 10 is a chain tensioning device 14 provided in a fixed on the housing 10 Protective hood 40 (Fig. 2) is attached.
- the Chain tensioning device 14 has a housing-side rotatable - Specified eccentric 15, which is on a sword 13th fixed stop 16 supports, and a rotary member 17 for Turn the eccentric 15 on.
- the slewing ring between the Rotary member 17 and the eccentric 15 is as Locking clutch 18 formed, the locking force adjusted according to the required chain tension is.
- the Chain tensioner 14 is the rotary link 17 as one Adapter sleeve 19 formed (Fig. 6 - 8) with a Internal thread section 20 on an external thread section 21 a stud 22 (Fig. 2) is screwed on.
- the Stud 22 is attached at the end in the housing 10 and stands at right angles from a housing shoulder 101 of the housing 10, on which the sword 13 is held longitudinally.
- Guide of the sword 13 on the housing shoulder 101 are from the latter two guide warts 23 from which to guide the Swords 13 into an existing one in sword 13, in Sword longitudinally extending slot 24 with Intervene in a form-fitting manner.
- the stud 22 protrudes through the slot 24 in the sword 13, while the clamping sleeve 19 screwed onto the stud 22 Overlaps slot 24 and by screwing onto the Stud 22 the sword 13 on the housing shoulder 101 able to press and thus the sword 13 immovable attaches to the housing 10.
- the adapter sleeve 19 is on the free end of a rotary knob 25 is rotatably attached.
- the clamping sleeve 19 bears on the sword 13 opposite end a radially projecting flange 26, the is positively received in the rotary knob 25 and with its: r top on a collar 27 formed in the rotary knob 25 supports and on its underside by using the rotary knob 25 one-piece snap hook 28 is engaged (Fig. 2).
- the Eccentric 15 is rotatably mounted on the clamping sleeve 19 and by means of one fixed in the adapter sleeve 19 Circlip 29 against axial displacement towards Sword 13 prevented.
- Locking clutch 18 has a rotationally fixed with the eccentric 15 connected first clutch disc 30 with the Disk circumference equidistant locking elements 31 (Fig. 3), one rotatably connected to the adapter sleeve 19 second clutch disc 32 with over the disc circumference equidistant locking elements 33 (Fig. 5) and a Clutch spring 33 on.
- the two clutch plates 30.32 rest on each other with their locking elements 31, 33, the locking elements 31 of the clutch disc 30 in one piece on Eccentric 15 are formed, and are of the Coupling spring 34 pressed onto one another in the axial direction.
- the clutch spring 34 as Helical compression spring formed on the one hand on the back of the second facing away from the eccentric 15 Clutch disc 32 and the other on the second Clutch disc 32 facing underside of flange 26 supported on the adapter sleeve 19.
- the clutch spring 34 is the overlap force of the Locking clutch 18 set.
- FIG. 2 it is on the flange 26 the clamping sleeve 19 form-fitted and on the flange 26 locked knob 25 in the sprocket 11 and Chain tensioning device 14 covering protective cover 40 rotatably guided, for which purpose the protective hood 40 to the clamping sleeve 19 coaxial, circular, shell-like recess 41 has, in which the knob 25 is immersed.
- the rotary knob 25 is in plan view in Fig. 9, in side view in Fig. 10 and partially cut and in Fig. 2 in longitudinal section a handle bar 43 formed on it is shown.
- He has a flat button plate 42 with which it is rectangular protruding, diametrically extending handle bar 43 and one rotating on the button plate 42 projecting radially Ring web 44.
- the knob 25 lies with its button plate 42 on the bottom of the recess 41 and engages his ring bridge 44 leaving a spin behind several in the ring wall of the recess 41 in the protective hood 40 latching hooks 45.
- a locking mechanism 46 is provided, which a turning back of the Knob 25 against the direction of rotation to unscrew the Clamping sleeve 19 on the stud 22, that is to say in FIG. 9 Blocked counterclockwise rotation.
- This Locking mechanism 46 prevents the clamp connection between adapter sleeve 19, sword 13 and housing shoulder 101 at Loosen work with the chainsaw and thereby the Chain tension can change.
- the locking mechanism 46 has one formed on the base of the recess 41 for Adapter sleeve 19 coaxial, annular sawtooth bar 47 (Fig.
- each Latch 48 is on the underside of a spring tongue 49 arranged on three sides of the button plate 42nd is cut free.
- the tongue base of the spring tongue 49 stands a tab 50 integral with the spring tongue 49 at right angles from and extends parallel to the Handle bar 43. Become the tabs 50 with your thumb and fingers pressed against the handle bar 43, the spring tongues lift 49, as indicated by dashed lines in FIG.
- the chain tensioner 14 described above works as follows:
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Description
- Fig. 1
- ausschnittweise eine Seitenansicht einer Kettensäge im Bereich einer Kettenspannvorrichtung bei abgenommener Schutzhaube,
- Fig. 2
- einen Schnitt längs der Linie II-II in Fig. 1 der Kettensäge bei aufgesetzter Schutzhaube,
- Fig. 3
- eine Draufsicht eines Exzenters mit erster Kupplungsscheibe der Kettenspannvorrichtung in in Fig. 1 und 2,
- Fig. 4
- einen Schnitt längs der Linie IV-IV in Fig. 3,
- Fig. 5
- eine Draufsicht einer zweiten Kupplungsscheibe der Kettenspannvorrichtung in Fig. 1 und 2,
- Fig. 6
- eine Seitenansicht einer Spannhülse der Kettenspannvorrichtung in Fig. 1 und 2,
- Fig. 7
- einen Längsschnitt der Spannhülse in Fig. 6,
- Fig. 8
- eine Draufsicht der Spannhülse in Richtung Pfeil VIII in Fig. 6.
- Fig. 9
- eine Draufsicht eines Drehknopfs der Kettenspannvorrichtung in Fig. 1 und 2,
- Fig. 10
- eine Ansicht des Drehknopfs in Richtung Pfeil X in Fig. 9, teilweise geschnitten,
- Fig. 11
- einen Schnitt längs der Linie XI-XI in Fig. 9,
- Fig. 12
- eine Draufsicht eines Spannstücks der Kettenspannvorrichtung gemäß Fig. 1 und 2,
- Fig. 15
- eine Seitenansicht des Spannstücks in Richtung Pfeil XIII in Fig. 12.
Claims (10)
- Kettensäge mit einem Gehäuse (10), mit einem im Gehäuse (10) gelagerten Kettenrad (11) zum motorischen Antreiben einer Sägekette (12), mit einem aus dem Gehäuse (10) vorstehenden Schwert (13), das längs seines Schwertrands die im Kettenrad (11) eingehängte Sägekette (12) umlaufend führt und zum Spannen der Sägekette (12) in einem den Abstand zum Kettenrad (11) vergrößerten Sinn längsverschiebbar am Gehäuse (10) gehalten ist, und mit einer Kettenspannvorrichtung (14), die einen an einem am Schwert (13) festgelegten Anschlag (16) sich abstützenden, eine Längsverschiebung des Schwerts (13) bewirkenden Exzenter (15) und ein Drehglied (17) zum Drehen des Exzenters (15) aufweist, dadurch gekennzeichnet, daß die Drehverbindung zwischen Drehglied (17) und Exzenter (15) als Überrastkupplung (18) ausgebildet ist, deren Überrastkraft entsprechend der erforderlichen Kettenspannung der Sägekette (12) eingestellt ist.
- Kettensäge nach Anspruch 1, dadurch gekennzeichnet, daß der Exzenter (15) drehbeweglich und axial unverschieblich am Drehglied (17) gelagert ist und daß die Überrastkupplung (18) eine mit dem Exzenter (15) drehfest verbundene, mit Rastelementen (31) versehene erste Kupplungsscheibe (30) und eine drehfest mit dem Drehglied (17) verbundene, mit Rastelementen (33) versehene zweite Kupplungsscheibe (32) sowie eine vorgespannte Kupplungsfeder (34) aufweist, die die beiden mit ihren Rastelementen (31,33) aufeinanderliegenden Kupplungsscheiben (30,32) axial aufeinanderpreßt.
- Kettensäge nach Anspruch 2, dadurch gekennzeichnet, daß die erste Kupplungsscheibe (30) einstückig mit dem Exzenter (15) ausgeführt ist.
- Kettensäge nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das Drehglied (17) als Spannhülse (19) ausgebildet ist, die mit einem Innengewindeabschnitt (20) auf einem Außengewinde (21) eines im Gehäuse (10) gehaltenen Stehbolzens (22) aufgeschraubt ist, und daß zum Betätigen der Spannhülse (19) auf diese ein Drehknopf (25) drehfest aufgesteckt ist.
- Kettensäge nach Anspruch 4, dadurch gekennzeichnet, daß der Stehbolzen (32) durch ein im Schwert (13) ausgebildetes Langloch (24) durchragt und daß die Spannhülse (19) das Langloch (24) übergreift und durch Verschrauben auf dem Stehbolzen (22) zum Festsetzen des Schwerts (13) am Gehäuse (10) auf das Schwert (13) aufpreßbar ist.
- Kettensäge nach Anspruch 5, dadurch gekennzeichnet, daß das Kettenrad (11) und die Kettenspannvorrichtung (14) von einer am Gehäuse (10) befestigten Schutzhaube (40) überdeckt sind, durch die die Spannhülse (19) hindurchragt, daß der auf der Spannhülse (19) drehfest aufgesteckte Drehknopf (25) drehbar in der Schutzhaube (40) geführt ist und daß zwischen Drehknopf (25) und Schutzhaube (40) ein manuell lösbarer Rastmechanismus (46) vorgesehen ist, der ein Rückdrehen des Drehknopfs (25) gegen die Drehrichtung zum Aufschrauben der Spannhülse (19) auf den Stehbolzen (22) durch Formschluß blockiert.
- Kettensäge nach Anspruch 6, dadurch gekennzeichnet, daß der Rastmechanismus (46) eine an der Schutzhaube (40) angeordnete, zur Spannhülse (19) koaxiale, ringförmige Sägezahnleiste (47) und mindestens eine von der der Schutzhaube (40) zugekehrten Unterseite des Drehknopfs (25) federnd abstehende Rastnase (48) aufweist, die kraft- und formschlüssig in die Sägezahnleiste (47) eingreift.
- Kettensäge nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß der Drehknopf (25) eine ebene Knopfplatte (42) mit einer davon rechtwinklig abstehenden, sich diametral erstreckenden Griffleiste (43) aufweist, daß die Knopfplatte (42) am Grund einer kreisförmigen, schalenartigen Vertiefung (41) in der Schutzhaube (40) aufliegt und einen radial abstehenden, umlaufenden Ringsteg (44) aufweist, der von mehreren in der Ringwand der Vertiefung (40) angeordneten Rasthaken (45) mit Drehspiel hintergriffen ist.
- Kettensäge nach einem der Ansprüche 4 - 8, dadurch gekennzeichnet, daß die Spannhülse (19) an ihrem vom Schwert (13) abgekehrten Ende einen radial abstehenden Flansch (26) trägt, der formschlüssig im Drehknopf (25) einliegt, und daß die Kupplungsfeder (34) eine auf die Spannhülse (19) aufgeschobene Schraubendruckfeder ist, die sich zwischen dem Flansch (26) und der zweiten Kupplungsscheibe (32) abstützt.
- Kettensäge nach Anspruch 9, dadurch gekennzeichnet, daß der Flansch (26) sich mit seiner Oberseite an einem im Drehknopf (25) angeformten Bund (27) abstützt und auf seiner Unterseite von mit dem Drehknopf (25) einstückigen Schnapphaken (28) hintergriffen ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19931250 | 1999-07-07 | ||
| DE1999131250 DE19931250A1 (de) | 1999-07-07 | 1999-07-07 | Kettensäge |
| PCT/DE2000/001924 WO2001003896A1 (de) | 1999-07-07 | 2000-06-09 | Kettensäge mit einer mit überrastkupplung versehenen kettenspannvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1112155A1 EP1112155A1 (de) | 2001-07-04 |
| EP1112155B1 true EP1112155B1 (de) | 2004-10-20 |
Family
ID=7913879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00949087A Expired - Lifetime EP1112155B1 (de) | 1999-07-07 | 2000-06-09 | Kettensäge mit einer mit überrastkupplung versehenen kettenspannvorrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6564459B1 (de) |
| EP (1) | EP1112155B1 (de) |
| CN (1) | CN1138620C (de) |
| DE (2) | DE19931250A1 (de) |
| WO (1) | WO2001003896A1 (de) |
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| SE0200219L (sv) | 2002-01-28 | 2003-07-29 | Electrolux Abp | Kedjespännare vid motorsåg |
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| DE10302872A1 (de) * | 2003-01-25 | 2004-08-05 | Narex Česká Lípa a.s. | Kettensäge |
| JP4584143B2 (ja) * | 2003-05-20 | 2010-11-17 | ハスクバーナ・ゼノア株式会社 | オートチェンテンショナー |
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| JPH0727122Y2 (ja) * | 1986-12-17 | 1995-06-21 | 株式会社共立 | チェーンソーのソーチェーンテンショナー |
| SE469825B (sv) * | 1990-03-28 | 1993-09-27 | Electrolux Ab | Kedjespännanordning på motorsåg |
| DE4107110C2 (de) * | 1991-03-06 | 1999-06-02 | Stihl Maschf Andreas | Motorkettensäge mit einer Schmierölpumpe |
| US5144751A (en) * | 1991-08-09 | 1992-09-08 | Blount, Inc. | Method and apparatus for controlling saw chain tension |
| US5174029A (en) * | 1991-12-11 | 1992-12-29 | Jt Investments | Chain saw tensioning mechanism |
| DE4219956C2 (de) * | 1992-06-18 | 2000-03-30 | Stihl Maschf Andreas | Schneideinrichtung für eine Motorkettensäge |
| US5491899A (en) * | 1992-06-25 | 1996-02-20 | Stihl Andreas | Tensioning arrangement for a saw chain |
| DE9311081U1 (de) | 1993-07-24 | 1994-11-17 | Dolmar GmbH, 22045 Hamburg | Spannvorrichtung für einen Ketten- oder Riementrieb einer Handwerkzeugmaschine |
| FI101353B1 (fi) | 1997-01-30 | 1998-06-15 | Lako Forest Oy | Menetelmä ja laite katkaisusahan ketjun kiristämiseksi |
| US5896670A (en) * | 1997-07-24 | 1999-04-27 | Blount, Inc. | Chain tensioner for chain saw |
| US5938508A (en) * | 1997-08-11 | 1999-08-17 | Micron Electronics, Inc. | Method for removing marks from integrated circuit devices and devices so processed |
-
1999
- 1999-07-07 DE DE1999131250 patent/DE19931250A1/de not_active Withdrawn
-
2000
- 2000-06-09 WO PCT/DE2000/001924 patent/WO2001003896A1/de not_active Ceased
- 2000-06-09 EP EP00949087A patent/EP1112155B1/de not_active Expired - Lifetime
- 2000-06-09 DE DE50008318T patent/DE50008318D1/de not_active Expired - Fee Related
- 2000-06-09 US US09/786,540 patent/US6564459B1/en not_active Expired - Fee Related
- 2000-06-09 CN CNB00801342XA patent/CN1138620C/zh not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1316944A (zh) | 2001-10-10 |
| CN1138620C (zh) | 2004-02-18 |
| DE50008318D1 (de) | 2004-11-25 |
| EP1112155A1 (de) | 2001-07-04 |
| WO2001003896A1 (de) | 2001-01-18 |
| US6564459B1 (en) | 2003-05-20 |
| DE19931250A1 (de) | 2001-01-11 |
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