EP0290483A1 - Housing for motor-driven chain saws. - Google Patents
Housing for motor-driven chain saws.Info
- Publication number
- EP0290483A1 EP0290483A1 EP87906076A EP87906076A EP0290483A1 EP 0290483 A1 EP0290483 A1 EP 0290483A1 EP 87906076 A EP87906076 A EP 87906076A EP 87906076 A EP87906076 A EP 87906076A EP 0290483 A1 EP0290483 A1 EP 0290483A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- saw
- housing
- rail
- cover
- chain
- 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
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
-
- 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
- B27B17/083—Devices for arresting movement of the saw chain
Definitions
- the housing according to the invention can be used anywhere / where a housing for motor chain saws is to be formed.
- the invention relates to a housing for a motor chain saw with a drive unit, which drives the saw chain rotating over the saw rail via a chain wheel, with a fastening device consisting of two fastening bolts which pass through an elongated hole opening in the saw rail and a saw chain pretensioning device arranged in the area of the rail holding device and a sprocket cover which can be fastened to the housing and overlaps and covers the sprocket and the rail mounting device.
- a housing divided two or more times in which a drive unit, for example an internal combustion engine or an electric motor, is arranged, which drives the saw chain rotating over the saw rail via a chain wheel.
- the saw rail which is also called the saw bar, is provided with an elongated hole opening into which two fastening bolts arranged on the housing engage.
- the saw rail is held by means of fastening nuts screwed onto the fastening bolts.
- the saw bar is slid to tension the saw chain. This is done by loosening the saw rail fastening screws and actuating a saw chain tensioning device for displacing the saw rail, the fastening bolts being displaced within the elongated hole opening.
- the saw-rail fastening nuts serve at the same time for fastening the sprocket cover which overlaps and covers the sprocket and the rail mounting device. If the chain is now to be replaced, it is necessary not only to loosen the rail fastening nuts, but to unscrew them completely from the fastening bolts so that the sprocket cover can be removed. There is a risk that the fastening nuts will be lost, especially when working in the forest. In addition, the handling of such a motor chain saw when changing the chain is extremely complicated, since the saw rail is also no longer fastened when the chain wheel cover is removed and is held loosely on the fastening bolt, so that an arrangement of the saw chain around the saw rail is only possible with difficulty.
- the saw rail It would therefore be desirable for the saw rail to be relatively firm but adjustable and with the fasteners installed. gung nuts is held on the housing when the saw chain is placed. This has not been possible so far, since the sprocket cover is already installed in this state. In addition, in the case of the known saws, the disadvantage is that if the saw chain is inaccurately placed on the saw rail and the subsequent tightening of the locking screws of the chain tensioner is often destroyed.
- the chain tensioning device should be operable through the sprocket cover from the assembly side.
- the sprocket cover is already installed when the tensioning device can be actuated.
- a saw chain tensioning device which can be actuated without problems when the sprocket cover is removed, is not yet known.
- the invention is intended to design a rail holding device on the housing of a motor chain saw in such a way that when the saw chain is placed on it, the saw rail is already held relatively firmly and is adjustable via the saw chain tensioning device.
- the known tilting of the sword should be completely avoidable during assembly.
- a housing for a motor chain saw is provided with a drive unit which drives the saw chain revolving over the saw rail via a chain wheel, with a rail holder device consisting of two fastening bolts formed in an elongated hole opening in the saw rail, and a saw chain tensioning device arranged in the area of the rail holder device and a chain wheel cover which can be fastened to the housing and which covers and covers the chain wheel and the rail mounting device, in which it is provided in accordance with the invention that the chain wheel cover is formed in two parts and consists of a protective cover and a tensioning cover, the tensioning cover has two openings penetrable by the bolts and can be held by means of the saw rail fastening nuts which can be arranged on the bolts.
- the protective cover in the area of contact of the protective cover with the stretch cover 1 has a holding strip which is formed and arranged under the stretch cover. This enables the protective cover to be held securely on the clamping cover.
- the tensioning cover is preferably provided with a pin which passes through the tensioning cover and is rotatably fastened in it, which has a drive on its one end facing the housing outside and has two engagement webs projecting perpendicularly to the longitudinal axis of the bolt and that the protective cover has leverage has a long hole-like opening through which the end of the bolt carrying the engaging webs can be reached.
- a quick connection has been created, which enables the protective cover to be mounted or removed quickly from the tensioning cover.
- the fastening bolt is acted upon by a compression spring and the inside of the retaining strip of the tensioning cover is provided with an engagement profi le, so that unintentional loosening of the tendon or iv closure can be avoided.
- the protective cover is preferably provided with a number of fastening screws which pass through the protective cover and are rotatably fastened therein and can be engaged in corresponding threaded bores in the housing. These additional fastening screws enable the protective cover to be fastened to the housing, so that reliable protection against injuries by a chain which may jump off is ensured even when the housing parts are subjected to extreme loads.
- the bolt has at its end which protrudes into the elongated hole bore a gearwheel which has a tooth arranged in the elongated hole opening ⁇ rod is arranged combing.
- F i g. 1 shows a motor chain saw housing with a removed saw blade but a mounted sprocket cover in a diagrammatic side view
- FIG. 4 shows a housing of a motor chain saw with a rail mounting device and a saw rail in a disassembled state in a partial view
- F i g. 5 shows a further embodiment of a housing of a motor chain saw with a rail mounting device and a saw rail in the disassembled state in a partial illustration
- F i g. 6 a further embodiment of a motor chain housing with a removed saw rail, but with a mounted sprocket cover in a clear side view, and
- F i g. 7 shows a mounting bolt and a mounting sleeve according to FIG. 6 in an enlarged view Detailed description of the invention and best way to carry out the invention
- a housing of a motor chain saw designated 100 is shown, which has in its side region with a sprocket cover 10 covering the sprocket 11 and the rail mounting device 17.
- the sprocket cover 10 consists of a protective cover 20 and a clamping cover 30, which together form the sprocket cover 10, which overall has a shape corresponding to the known sprocket covers.
- the tensioning cover 30 has openings 12a, 13a through which the bolts 12, 13 of the rail mounting device 17 pass.
- the clamping cover 30 is held on the bolts 12, 13 by means of the rail fastening nuts 12b, 13b placed on the bolts 12, 13.
- the protective cover 20 has in the area of contact B of the protective cover 20 with the clamping cover 30 a holding strip 25 which engages under the clamping cover 30 in the region of its edge region 32.
- a bolt 40 is provided in the edge region 32 of the clamping cover 30 and has a drive 42 on its one end 41 facing the housing outer side 31. This can be designed as a screw head for a screwdriver or as a hexagon or hexagon socket for the engagement of a wrench.
- the bolt 40 as shown in FIG. 3, has two lower ends 43 at its other end. engaging webs 44, 45 projecting to the right of the longitudinal axis L of the bolt, which can be inserted into a slot-like opening 26 in the retaining strip 25 of the protective cover 20.
- the side of the mounting strip 25 facing the inside of the housing is provided with an insertion profile 27 in the area of the opening 26.
- the engagement webs 44, 45 are guided into the engagement 27 and held by it, so that the bolt 40 cannot be released. Since the bolt 40 in the clamping cover 30 is arranged so that it reaches through and is rotatably fastened to it, the protective cover 20 is connected to the clamping cover 30 with a fast-acting closure.
- the protective cover 20 is additionally fastened by screws 50, 51, 52 countersunk in the surface of the cover.
- the clamping cover 30 is also provided with the saw chain tensioning device 18. This is actuated by a bolt 60, which is also arranged in the clamping cover 30, wherein a rotation in the X direction of the saw rail 15 can be carried out by rotating the bolt 40.
- the pin 60 is arranged between the pins 12, 13 and rotatably mounted in the housing 100, which carries a drive 62 on its one end 61 facing the outside of the housing. This can be used as a screw be designed for the engagement of a screwdriver or as a hexagon or hexagon socket.
- the bolt 60 carries a gear wheel 65 which, when the saw rail 15 is placed on the bolts 12, 13, meshes with a toothed rack 70 arranged above the slot opening 16.
- the somewhat smaller gear 165 meshes with a toothed rack 170 arranged in the elongated opening 16 when the saw rail 15 is on the bolts 12, 13 is put on. It is also possible to have two toothed racks 70; 170 to arrange. If the toothed wheels 65; 165 are rotated via the bolt 60, the saw rail 15 is displaced in the region specified by the bolts 12, 13 and the elongated hole opening 16, as is indicated in FIG. 5 in the elongated hole 16.
- the formation of the saw chain tensioning device 18 by means of the gear / rack combination is only to be seen as an exemplary embodiment. It is also possible to arrange and mount on the pin 60 a stepping gear not shown in the drawing. to connect this in a suitable manner with the saw rail. It is essential that the saw chain tensioning device can be actuated when the tensioning cover 30 is installed.
- the sprocket cover 10 also consists of a protective cover 20 and a tensioning cover 30, which together form the sprocket cover 10.
- the clamping cover 30 is held by the bolts 12, 13 which penetrate the openings 12a, 13a and onto which the rail fastening nuts 12b, 13b are screwed.
- the protective cover 20 in the area B of contact of the protective cover 20 with the clamping cover 30 has a mounting strip 25 which engages under the clamping cover 30 in the region of its edge region 32.
- a holding sleeve 22 is arranged in a cover-fixed manner and has a longitudinal slot 23.
- the housing 200 is provided with a housing opening 24a and a mounting plate 27 arranged fixed to the housing such that when the protective cover 20 is attached to the housing, a mounting bolt 24 can be inserted through the housing opening 24a and through the holder sleeve 22, the hook-shaped foot part 25 of the mounting bolt 24 is guided in the longitudinal slot 23 of the mounting sleeve 22.
- the length of the mounting bolt 24 is such that its hook-shaped foot part L 25 allows it to reach through and under the access opening 27a of the mounting plate 27, the hook-shaped foot part rotating the holding bolt head 26 via a catch 27b on the Bracket plate 27 can be slid over so that the bracket bolt 24 is locked by the catch 27b and prevented from rotating. In this position, the hook-shaped foot part 25 simultaneously acts on the ignition interruption switch 28, the ignition not being interrupted when it is acted upon. If the mounting bolt head 26 is then rotated and the hook-shaped foot part 25 is returned to the longitudinal slot 23 via the catch 27b, the ignition of the internal combustion engine is immediately interrupted via the ignition interruption switch 28. In this way it can be achieved that it is not possible to remove the protective cover 20 when the internal combustion engine is in operation.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
Afin d'obtenir un dispositif de support des rails sur le logement d'une scie à chaîne à moteur qui permette de retenir le rail de a scie de façon relativement ferme lors du montage de a chaîne de la scie et de l'ajuster à l'aide du dispositif de serrage de la chaîne de la scie, le logement d'une scie à chaîne à moteur comprend une unité motrice pour entraîner par l'intermédiaire d'une roue à chaîne la chaîne de la scie qui tourne sur le rail de la scie, un dispositif de fixation du rail ayant deux boulons de fixation qui traversent une fente allongée formée dans le rail de la scie, un dispositif de serrage de la chaîne de la scie agencé dans la zone du dispositif de fixation du rail et un couvercle de la roue à chaîne attachable au logement qui recouvre la roue à chaîne et le dispositif de fixation du rail. Le couvercle (10) de la roue à chaîne est formé en deux parties, un couvercle de protection (20) et un couvercle de serrage (30). Le couvercle de serrage (30) comprend deux orifices (12a, 13a) traversés par les boulons (12, 13) et peut être fixé par des écrous (12b, 13b) de fixation du rail de la scie qui viennent se visser sur les boulons (12, 13).In order to obtain a rail support device on the housing of a motor chain saw which makes it possible to retain the saw rail relatively firmly when mounting the chain of the saw and to adjust it to the Using the saw chain clamping device, the housing of a motorized chain saw comprises a motor unit for driving the chain of the saw which turns on the rail by means of a chain wheel. the saw, a rail fixing device having two fixing bolts which pass through an elongated slot formed in the saw rail, a saw chain clamping device arranged in the area of the rail fixing device and a cover of the chain wheel attachable to the housing which covers the chain wheel and the rail fixing device. The cover (10) of the chain wheel is formed in two parts, a protective cover (20) and a clamping cover (30). The clamping cover (30) comprises two holes (12a, 13a) through which the bolts (12, 13) pass and can be fixed by nuts (12b, 13b) fixing the saw rail which are screwed on the bolts (12, 13).
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87906076T ATE51793T1 (en) | 1986-11-25 | 1987-09-23 | HOUSING FOR A MOTOR CHAINSAW. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3640162 | 1986-11-25 | ||
DE19863640162 DE3640162A1 (en) | 1986-11-25 | 1986-11-25 | HOUSING FOR A MOTOR CHAINSAW |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0290483A1 true EP0290483A1 (en) | 1988-11-17 |
EP0290483B1 EP0290483B1 (en) | 1990-04-11 |
Family
ID=6314674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87906076A Expired - Lifetime EP0290483B1 (en) | 1986-11-25 | 1987-09-23 | Housing for motor-driven chain saws |
Country Status (5)
Country | Link |
---|---|
US (1) | US4939842A (en) |
EP (1) | EP0290483B1 (en) |
JP (1) | JPH01501379A (en) |
DE (2) | DE3640162A1 (en) |
WO (1) | WO1988003858A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE469825B (en) * | 1990-03-28 | 1993-09-27 | Electrolux Ab | Chain clamp device on chainsaw |
USD377441S (en) * | 1995-08-03 | 1997-01-21 | Andreas Stihl | Motor-driven chain saw |
SE511283C2 (en) * | 1997-06-04 | 1999-09-06 | Sandvik Ab | Stretch mechanism and chain saw for chain saws |
DE19737886C1 (en) * | 1997-08-29 | 1998-12-24 | Dolmar Gmbh | Motor driven chain saw |
CA2303675A1 (en) * | 2000-04-03 | 2001-10-03 | Joseph Gerald Ronald Paquin | Chainsaw bar guard |
US20040060178A1 (en) * | 2002-10-01 | 2004-04-01 | Mark Willer | Circular saw |
US20070054542A1 (en) * | 2005-09-06 | 2007-03-08 | Champlin David E | Uni-body power tool |
US20070056168A1 (en) * | 2005-09-15 | 2007-03-15 | Mclaughlin Michael J | Chain saw tool holder |
USD741678S1 (en) | 2012-04-13 | 2015-10-27 | Andreas Stihl Ag & Co. Kg | Chain saw for cutting stone |
USD744308S1 (en) | 2012-08-02 | 2015-12-01 | Andreas Stihl Ag & Co. Kg | Chainsaw |
USD763051S1 (en) | 2014-04-04 | 2016-08-09 | Andreas Stihl Ag & Co. Kg | Chainsaw |
CN104068979B (en) | 2014-07-11 | 2016-10-26 | 杨为忠 | Functional medical bed |
USD790303S1 (en) | 2015-08-06 | 2017-06-27 | Andreas Stihl Ag & Co. Kg | Cordless chainsaw |
USD826021S1 (en) | 2016-02-15 | 2018-08-21 | Andreas Stihl Ag & Co., Kg | Chain saw |
JP6648829B2 (en) * | 2016-06-27 | 2020-02-14 | 工機ホールディングス株式会社 | Chain saw |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB190901894A (en) * | 1909-01-26 | 1910-01-20 | Heinrich Johann Bosse | Improvements in Chain-saws. |
US1046169A (en) * | 1912-03-27 | 1912-12-03 | Charles Leo Frederick | Belt-shifter. |
US2670017A (en) * | 1948-11-29 | 1954-02-23 | Max H Fiest | Tensioning means for poweroperated chain saws |
SE348964B (en) * | 1969-10-29 | 1972-09-18 | Jonsereds Fabrikers Ab | |
US3636995A (en) * | 1970-07-02 | 1972-01-25 | Textron Inc | Tensioner for saw chain |
US3870125A (en) * | 1973-02-02 | 1975-03-11 | Textron Inc | Guide bar oiling system for chain saw |
GB1445819A (en) * | 1974-03-01 | 1976-08-11 | Meggitt Eng Ltd | Meat material cutting bandsaw |
US3974566A (en) * | 1975-09-08 | 1976-08-17 | Mcculloch Corporation | Method and apparatus for arresting movement of a chain saw cutter chain |
US4117594A (en) * | 1977-10-02 | 1978-10-03 | Textron Inc. | Guide bar mount for chain saw |
DE3004588A1 (en) * | 1980-02-08 | 1981-08-13 | Fa. Andreas Stihl, 7050 Waiblingen | PORTABLE MOTOR CHAINSAW |
EP0076251A1 (en) * | 1980-08-08 | 1983-04-13 | Black & Decker Inc. | Ribbed handle and guard construction for chain saw |
US4382334A (en) * | 1981-07-01 | 1983-05-10 | Omark Industries, Inc. | Chain saw device |
US4457650A (en) * | 1982-01-04 | 1984-07-03 | Tseng Tsiung Siung | Reversible watertight type container securing assembly |
DE3301367A1 (en) * | 1983-01-18 | 1984-07-19 | Fa. Andreas Stihl, 7050 Waiblingen | CHAIN TENSIONER FOR A CHAINSAW |
DE3527024A1 (en) * | 1985-07-27 | 1987-01-29 | Bosch Gmbh Robert | CHAINSAW WITH A SUBMERSIBLE OIL PUMP |
US4819332A (en) * | 1987-02-26 | 1989-04-11 | Sugihara Rinki Co., Ltd. | Oil supply structure of chain saw |
-
1986
- 1986-11-25 DE DE19863640162 patent/DE3640162A1/en not_active Withdrawn
-
1987
- 1987-09-23 US US07/218,289 patent/US4939842A/en not_active Expired - Fee Related
- 1987-09-23 WO PCT/DE1987/000436 patent/WO1988003858A1/en active IP Right Grant
- 1987-09-23 EP EP87906076A patent/EP0290483B1/en not_active Expired - Lifetime
- 1987-09-23 DE DE8787906076T patent/DE3762199D1/en not_active Expired - Lifetime
- 1987-09-23 JP JP62505597A patent/JPH01501379A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO8803858A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3762199D1 (en) | 1990-05-17 |
WO1988003858A1 (en) | 1988-06-02 |
DE3640162A1 (en) | 1988-05-26 |
JPH01501379A (en) | 1989-05-18 |
US4939842A (en) | 1990-07-10 |
EP0290483B1 (en) | 1990-04-11 |
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