EP2679358B1 - Power tool having a braking system - Google Patents
Power tool having a braking system Download PDFInfo
- Publication number
- EP2679358B1 EP2679358B1 EP13002892.1A EP13002892A EP2679358B1 EP 2679358 B1 EP2679358 B1 EP 2679358B1 EP 13002892 A EP13002892 A EP 13002892A EP 2679358 B1 EP2679358 B1 EP 2679358B1
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- EP
- European Patent Office
- Prior art keywords
- lever
- choke
- working implement
- starting position
- implement according
- 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.)
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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
- B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw
- B27B17/083—Devices for arresting movement of the saw chain
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
Definitions
- the invention relates to a working device with a braking device of the type specified in the preamble of claim 1, which is known from the document DE 33 08 400 A1 is known.
- a power saw which has a braking device.
- the mode selector of the chainsaw is connected via a Bowden cable with a lever part, which acts on the band brake of the chainsaw. If the mode selector is set to the starting position, the band brake of the chain saw is inserted. For inserting and releasing the band brake comparatively large operating forces are required, so that the operation of the mode selector for the user is unergonomic.
- the invention has for its object to provide a working device of the generic type, which has a high ease of use and a simple structure and in which the braking device is always actuated when the Startanreich ceremoniess adopted is in a starting position.
- a locking device can be easily prevented that the starting position can be engaged by the operator when the braking device is not actuated.
- An insertion of the starting position denotes an adjustment of the Startanreich réelles promoted in a starting position in which the Startanreich réelles promoted without external action, ie after releasing a Radioartstellers or the like remains. If the starting position can not be engaged, the operator knows that the braking device must first be inserted before the starting position can be inserted. As a result, accidental insertion of the starting position during operation is prevented because the braking device is not active during operation.
- About the mode selector only the usual, relatively low operating forces must be applied to insert the starting position.
- the locking device can also be operated with low operating forces. This allows a simple construction of the working device.
- the start enrichment device has a valve element which is adjustable between an operating position and at least one starting position.
- two start positions namely a hot start position and a cold start position are provided so that the implement can be started adapted to the ambient conditions and the temperature of the internal combustion engine.
- the valve element is advantageously held by a fixing device in the starting position.
- the locking device prevents fixation of the valve element by the fixing device in the starting position.
- the valve element is advantageously spring-mounted in the direction of its operating position and, when the valve element is not fixed by the fixing device, is returned to its operating position by the spring force as soon as the operator releases the mode selector.
- a valve element is in particular a choke element connected to a choke lever. If the choke element can not be adjusted to its starting position, usually no starting of the internal combustion engine is possible.
- a valve element is advantageously a throttle element connected to a throttle lever. It has been found that it is sufficient to avoid adjusting a throttle element to its starting position, ie usually a slightly open position, in order to ensure that the internal combustion engine can not be started.
- the choke element and the throttle element are advantageously adjusted to a starting position.
- the free flow cross-section of an intake duct of the internal combustion engine, which releases the throttle element in the starting position, is advantageously greater than the released in the unactuated position of the throttle element flow cross-section.
- the choke element advantageously does not significantly reduce the flow cross-section of the intake duct in the operating position.
- the free flow cross section of the intake duct is advantageously reduced very clearly by the choke element.
- the throttle lever acts to fix a starting position of at least one valve element with the choke lever together. This results in a simple structure.
- the throttle lever and the choke lever are advantageously arranged in the usual manner on the outside of a carburetor of the working device.
- the locking device advantageously prevents a fixation of a valve element in a starting position.
- the locking device prevents in particular an engagement of the throttle lever on the choke lever. Due to the fact that the throttle lever can not engage the choke lever and fix the choke lever in the starting position of the choke element, the choke element does not remain in the starting position.
- the choke element can therefore be adjusted to the starting position, but advantageously returns to the operating position after releasing the mode selector. Insertion of the starting position, that is to say an adjustment of the start enrichment device to a starting position in which the start enrichment device remains without external action, is not possible.
- a fixation of the throttle element in its starting position can be prevented, in particular when the mode selector acts on the throttle element.
- the throttle element is advantageously not fixed in its starting position, but returns after releasing the mode selector back to its operating position, so that the starting position can not be engaged, so the throttle element does not remain without external action in the starting position.
- a simple structure is achieved when the choke lever is mounted on a choke shaft and the throttle lever on a throttle shaft.
- the choke lever is rotatably held on the choke shaft and the throttle lever against rotation of the throttle shaft.
- at least one of the levers is slidably mounted on its shaft in the longitudinal direction of its pivot axis.
- the locking device advantageously has a displacement contour which moves at least one of the levers in the longitudinal direction of its pivot axis. This can be achieved in a simple way that the levers can not interfere with each other.
- an already inserted starting position is advantageously also released again when the braking device is released.
- the displacement of the lever is advantageously against the force of a spring.
- the spring is advantageously a torsion spring which biases the respective lever in its unactuated position.
- the throttle lever is spring-loaded in the direction of the fully closed position of the throttle element and the choke lever in the direction of the fully open position of the choke element.
- a simple construction can also be achieved if the locking device prevents movement of the valve element into the starting position. This can be done in a simple manner in that the locking device extends in the path of movement of one of the moving during insertion of the starting position components.
- a simple structure is achieved when the valve element is to be actuated via a coupling rod of the mode selector and the locking device is arranged in the adjustment path of the coupling rod.
- the locking device blocks the path of movement of the mode selector, for example by blocking the shift gate.
- the path of movement of a lever connected to the valve element in particular a choke lever or throttle lever can be blocked by the locking device.
- the valve element is spring-loaded in the direction of its operating position and pivots back when releasing the mode selector due to the spring force in its operating position.
- the locking device has an actuating contour which releases the start enrichment device from the starting position when the braking device is released while the start enrichment device is in the starting position.
- the actuating device for the braking device is advantageously a hand guard.
- the working device is in particular a hand-held implement, advantageously a power saw.
- a simple construction is achieved when the braking device comprises a differential belt brake.
- a differential band brake has a self-reinforcing effect and can be operated with minimal operating forces. This results in an ergonomic operation.
- Fig. 1 shows as an exemplary embodiment of an implement a hand-held power saw 1.
- the power saw 1 has a housing 2 to which a rear handle 3 and a handle tube 4 are fixed.
- the rear handle 3 and the handle tube 4 are of a arranged in the housing 2 internal combustion engine 11 (FIG. Fig. 2 ) vibration decoupled.
- a throttle lever 8 and a throttle lever lock 9 are pivotally mounted.
- Adjacent to the rear handle 3, a mode selector 10 projects out of the housing 2.
- a guide rail 6 protrudes from the housing 2 to the front.
- On the guide rail 6, a saw chain 7 is arranged circumferentially, which is driven by the engine 11.
- a hand guard 5 is arranged, which is pivotally mounted on the housing 2.
- Fig. 2 shows the structure of the drive of the power saw 1 in detail.
- the internal combustion engine 11 has a cylinder 16 in which a piston 18 is reciprocated.
- the piston 18 drives via a connecting rod 19 a rotatably mounted in a crankcase 17 crankshaft 12.
- the internal combustion engine 11 is advantageously a single-cylinder engine, in particular a two-stroke engine.
- a fan 20 is set, which serves to promote cooling air for the engine 11.
- a starting device 21 is arranged, which serves to crank the internal combustion engine 11.
- the starting device 21 is advantageously a manually operated picking device, such as a pull starter. However, the starting device 21 may also be electrically operated.
- centrifugal clutch 13 At the side facing away from the fan 20 of the engine 11, a centrifugal clutch 13 is fixed to the crankshaft 12.
- the centrifugal clutch 13 has a clutch drum 14, which at the same time as a brake drum for a braking device 55 (FIG. Fig. 3 ) serves.
- the brake device 55 is a band brake and has one around the clutch drum 14 looped brake band 15.
- On the clutch drum 14, a drive pinion 22 is fixed, which serves to drive the saw chain 7 to the guide rail 6.
- the operator When starting the internal combustion engine 11, the operator must use the braking device 55 (FIG. Fig. 3 ), so insert the brake, so that the brake band 15 rests against the clutch drum 14 and the saw chain 7 brakes.
- the braking device 55 is to be operated via the hand guard 5.
- the hand guard 5 As Fig. 3 shows, the hand guard 5 is pivotally mounted about a pivot axis 31.
- the hand guard 5 has a bearing portion 34 adjacent to which a first arm 25 of a toggle mechanism 24 extends.
- the first arm 25 is connected via a second arm 26 with a pivot lever 27.
- the pivot lever 27 forms with a brake spring 28 and the toggle mechanism 24 a trigger mechanism 23 for the braking device 55.
- the bearing section 34 takes on a movement of the hand guard 5 in the direction of arrow 32, ie in the direction of the saw chain 7 forward, the first arm 25th the toggle mechanism 24 with.
- the toggle mechanism 24 is thereby guided over its dead center.
- the brake spring 28 can pivot the pivot lever 27 in the direction of the arrow 33 and thereby move a first end 29 of the brake band 15 away from the clutch drum 14.
- a second end 30 of the brake band 15 is fixedly mounted on the housing 2.
- the hand guard 5 is pivoted in the opposite direction to the arrow 32, the hand guard 5 is thus pulled in the direction of the handle tube 4.
- the bearing portion 34 takes the first arm 25 in the in Fig. 3 shown position with.
- the brake spring 28 is tensioned, and the toggle mechanism 24 is guided over its dead center, so that the force exerted by the brake spring 28 via the toggle mechanism 24 is intercepted.
- the hand guard 5 returns after actuation in the direction of arrow 32 or after pressing in the opposite direction always back to its original position.
- a return spring not shown, is provided.
- Another braking device 55 may be advantageous for the power saw 1.
- the structure of the braking device 55 is independent of the hereinafter described construction of a locking device for the start enrichment device of the power saw 1.
- Fig. 4 schematically shows a carburetor 35 of the engine 11.
- the carburetor 35 has a carburetor housing 45, in which an intake passage section 36 is formed, via which the engine 11, fuel / air mixture is supplied.
- a throttle valve 37 is mounted with a throttle shaft 39 pivotally about a pivot axis 84.
- a choke flap 38 with a choke shaft 40 is mounted pivotably about a pivot axis 85 upstream of the throttle flap 37.
- other choke elements or throttle elements for example, cylindrical choke or throttle elements may be provided.
- a throttle lever 41 is fixed to the throttle shaft 39 and a choke lever 42 at the choke shaft 40.
- the intake passage section 36 is in Fig. 4 shown cut and throttle lever 41 and choke lever 42 in side view.
- the throttle lever 41 is non-rotatably connected to the throttle shaft 39 and the choke lever 42 rotatably connected to the choke shaft 40.
- Throttle lever 41 and throttle shaft 39 and choke lever 42 and choke shaft 40 may also be mutually rotatable, advantageously by a structurally predetermined, small angular amount, for example Compensation of manufacturing tolerances.
- the choke flap 38 can be actuated via a coupling rod 46 suspended on the choke lever 42, ie pivoted about the pivot axis 85.
- the coupling rod 46 is connected to the mode selector 10 in conjunction.
- the coupling rod 46 is mounted on the mode selector 10.
- the mode selector 10 together with the coupling rod 46, the choke lever 42 and the choke flap 38, forms a start enrichment device of the internal combustion engine 11.
- the throttle lever 41 is also part of the start enrichment device. In order to set a start position 48 of the start enrichment device, first the throttle lever 41 has to be pivoted out of the swivel range of the choke lever 42. For this purpose, an operator must have the in Fig. 1 Press the throttle lever 8 shown.
- Fig. 5 shows the carburetor 35 in starting position 48.
- the in Fig. 5 shown start position 48 is a warm start position.
- a cold start position can also be provided.
- start position 48 of the throttle lever 41 fixes the choke lever 42.
- the throttle lever 41 is located on a shoulder 49 of the choke lever 42 at.
- the throttle 37 is spring loaded towards its fully closed position and the choke flap 38 is toward its fully open position.
- the throttle lever 41 and the choke lever 42 fix each other.
- the throttle valve 37 is slightly open.
- the choke flap 38 is partially closed.
- the choke flap 38 may, for example, at an angle of about 30 ° to 60 ° relative to the in Fig. 4 shown operating position 83 to be pivoted.
- the choke flap 38 reduces the free flow cross section through the intake passage section 36 the start position 48 the mode selector 10 ( Fig. 1 ) let go. Throttle 37 and choke flap 38 remain in their starting positions 82 and 86 stand. This allows the operator with the free hand, the starting device 21 ( Fig. 2 ) and at the same time hold the chainsaw 1 on the handle tube 4.
- Fig. 6 shows a first embodiment of a barrier means 56 for the start enrichment device.
- the braking device 55 is not inserted.
- a control lever 52 is connected via not shown, which is also pivotally mounted about the pivot axis 31. If the hand guard 5 was actuated in the direction of the arrow 51, that is to say attracted to the grip tube 4, then the adjusting lever 52 is in the position shown in FIG Fig. 6 shown position.
- the braking device 55 is not actuated, so the brake band 15 so not tightly wrapped around the clutch drum 14.
- an actuating element 53 is fixed, which acts on a blocking element 57.
- the actuator 53 is a coupling rod, but it can also be another, also a multi-part actuator 53 may be provided.
- the blocking element 57 is stirred via guides, not shown, on the housing 2, which are advantageous in Fig. 6 are arranged in front of the plane of the drawing.
- the blocking element 57 is designed as a slide. Another design of the locking member 57, for example as a pivot lever or the like, may be advantageous.
- the blocking element 57 is arranged adjacent to the carburetor housing 45 and projects into the region of the choke lever 42. In the side view in FIG Fig. 6 the throttle lever 41 is covered by the blocking element 57.
- Fig. 6 is also the structure of the mode selector 10 shown in detail.
- the mode selector 10 is pivotally mounted about a pivot axis 54 on the housing 2 and has an operating section 58 which protrudes from the housing 2 and can be operated by the operator.
- a spring 63 is held, which serves as a contact spring for an ignition device of the internal combustion engine 11.
- the spring 63 is applied to a short-circuit contact and short-circuits the ignition of the internal combustion engine 11, so that the internal combustion engine 11 stops.
- the spring 63 can simultaneously define detent positions of the mode selector 10.
- Fig. 6 shows the internal combustion engine 11 and the carburetor 35 are covered by a hood 59 of the housing 2.
- the blocking element 57 has a displacement contour 47, which in the in FIGS. 6 and 7 shown blocking position 80 laterally displaces the throttle lever 41 in the direction of the carburetor housing 35.
- the choke lever 42 and the throttle lever 41 are arranged in staggered planes and can not come into engagement with each other.
- the throttle lever 41 has been displaced against the force of a spring 61 in the longitudinal direction of the pivot axis 84.
- the spring 61 is a torsion spring that biases the throttle 37 toward its fully closed position.
- the choke lever 42 and the choke flap 38 are spring-loaded by a spring 50 in the direction of the fully open position of the choke flap 38.
- a spring 50 in the direction of the fully open position of the choke flap 38.
- the blocking element 57 acts on the choke lever 42 and shifts the choke lever 42 laterally out of the swiveling range of the throttle lever 41, in order to prevent the choke lever 42 and throttle lever 41 from locking.
- FIGS. 9 to 11 show the locking device 56 in the release position 81.
- the operator To adjust the locking device 56 from the blocking position 80 in the release position 81, the operator must the hand guard 5 in the direction of arrow 62 in Fig. 9 pivot, ie in the direction of the saw chain 7.
- the braking device 55 is actuated and the brake band 15 tightened around the clutch drum 14.
- the hand guard 5 takes the lever 52 in the direction of arrow 65 in Fig. 9 With.
- the blocking element 57 is pulled away from the choke lever 42 and throttle lever 41 in the direction of the hand guard 5.
- Fig. 10 shows the displacement contour 47 thereby disengaged from the throttle lever 41.
- FIG. 11 shows the throttle lever 41 was thereby pressed by the spring 61 away from the carburetor housing 45 and placed in the same plane in which the choke lever 42 is arranged. If the mode selector 10 in the direction of arrow 60 ( Fig. 9 ), after the throttle lever 8 has been operated for pivoting the throttle lever 41, the in Fig. 5 shown starting position 48 or a cold start position, not shown, to reach the mode selector 10 must be pressed even further in the direction of arrow 60, are set. In the in the FIGS. 9 to 11 Accordingly, the operator can set the starting position 48 and then release the mode selector 10 due to the fixation of the choke lever 42 by the throttle lever 41. As a result, the operator has a hand free to start the starting device 21 (FIG. Fig. 2 ) too Press and can start the engine 11 so. Due to the blocking device 56, starting of the internal combustion engine 11 is possible only when the braking device 55 is in its actuated position and the saw chain 7 is braked.
- FIGS. 12 to 15 show a locking device 66 in a blocking position 80.
- the same reference numerals as in the preceding figures indicate corresponding components.
- the locking device 66 has a blocking element 67, on which the actuating element 53 acts.
- the blocking element 67 can also be guided on the housing 2.
- In the blocking position 80 shown is an in Fig. 13 shown locking contour 70 is arranged in the path of movement of the coupling rod 46.
- the coupling rod 46 may not or only slightly in the direction of in Fig. 13 shown arrow 68 are pivoted.
- the coupling rod 46 can not be pivoted until the choke flap 38 reaches the starting position 48.
- the operator can not actuate the mode selector 10 or not far enough in the direction of the arrow 60, and inserting a starting position 48 is not possible.
- a pivoting of the choke lever 42 about the pivot axis 85 is blocked by the locking contour 70.
- the throttle lever 41 and the choke lever 42 are in the same plane, the throttle lever 41 can not fix the choke lever 42 in a start position 48 since the choke lever 42 can not be pivoted sufficiently far about the pivot axis 85.
- the blocking contour 70 prevents a pivoting of the throttle lever 41. Even if the throttle valve 37 is not in its starting position 86, starting the internal combustion engine 9 is usually not possible.
- FIGS. 16 to 18 show the locking device 66 in the release position 81.
- the release position 81 is by pivoting the hand guard 5 in the direction of arrow 62 in Fig. 16 inserted.
- the braking device 55 is actuated and the brake is engaged.
- the adjusting lever 52 pivots in the direction of the arrow 65 about the pivot axis 31, whereby the blocking element 67 is moved with the locking contour 70 from the pivoting range of the coupling rod 46.
- Characterized in that the locking contour 70 is not arranged in the pivoting range of the coupling rod 46 can the mode selector 10 in the direction of arrow 60 ( Fig. 16 ) is pivoted until reaching the starting position 48 and thereby the starting position 48 (FIG. Fig. 5 ) be inserted.
- FIGS. 19 to 21 show an embodiment of a locking device 76 having a blocking element 77.
- the blocking element 77 has both a displacement contour 47 and a blocking contour 70.
- blocking position 80 is a pivoting of the mode selector 10 is not possible because the locking contour 70 ( Fig. 21 ) is arranged in Verschwenkweg the coupling rod 46 and thereby prevents an adjustment of the mode selector 10.
- a coupling between throttle lever 41 and choke lever 42 is not possible because the displacement contour 47 has the throttle lever 41 against the force of the spring 61 laterally disengaged and moved from the pivoting range of the choke lever 42. As a result, latching of throttle lever 41 and choke lever 42 is not possible.
- the locking device 76 is shown in the release position 81.
- the displacement contour 47 is no longer in engagement with the throttle lever 41, so that throttle lever 41 and choke lever 42 are arranged in the same plane and can engage with each other.
- the locking contour 70 has moved out of the pivoting region of the coupling rod 46, so that the choke lever 42 can be pivoted via the coupling rod 46 by pivoting the operating mode actuator 10. This allows the in Fig. 5 shown start position 48 inserted and then the mode selector 10 are released. Due to the locking between choke lever 42 and throttle lever 41, the mode selector 10 stops in the starting position 48.
- the choke lever 42 in addition to or alternatively to the throttle lever 41, can also be displaced in the longitudinal direction of its pivot axis 85 to place choke lever 42 and throttle lever 41 in staggered planes and to prevent the levers 41, 42 from engaging with each other can come.
- the locking devices 66 and 76 have on the blocking element 67 and on the blocking element 77 an actuating contour 64, which in Fig. 13 and Fig. 19 is shown in detail.
- the actuating contour 64 is formed as a slope.
- the actuating contour 64 returns the choke lever 42 to the operating position 83 of the choke flap 38 when the brake device 55 is released while the start enrichment device is in the start position 48.
- the starting position 48 is achieved in the locking devices 56 and 66 via the displacement contour 47, which disengages the throttle lever 41 laterally when the braking device 55 is released. This ensures that an inserted starting position 48 is released when the braking device 55 is placed in the released position of the brake.
- the throttle lever 41 may consist of an elastic material, such as a plastic.
- Fig. 25 shows an alternative embodiment for a braking device 90.
- the braking device 90 has a differential belt brake 91, which includes the brake band 15 and the clutch drum 14.
- the same reference numerals as in the preceding figures designate corresponding elements.
- the clutch drum 14 rotates in operation in a rotational direction 97 about a rotation axis 98.
- the differential band brake 91 has a pivot lever 92, on which the hand guard 5 acts.
- the braking device 91 is shown in the braked position in which the brake band 15 tightly wraps around the clutch drum 14.
- the pivot lever 91 is pivotally mounted about a pivot axis 93 and biased by a spring 96 in the direction of the unactuated, unbraked position of the differential belt brake 91.
- the brake band 15 has a first end 94 and a second end 95.
- the two ends 94 and 95 of the brake band are fixed at different distances from the pivot axis 93 on the pivot lever 92.
- the first end 94 has the pivot axis 93 at a distance a, which is significantly smaller than a distance b of the second end 95 to the pivot axis 93.
- the distances a and b are measured perpendicular to the longitudinal direction of the ends 94 and 95.
- the distance b may advantageously be about 2 times to about 20 times the distance a.
- the direction of rotation 97 is directed on the outer circumference of the clutch drum 14 from the first end 94 to the second end 95. As a result, the differential band brake acts self-reinforcing.
Description
Die Erfindung betrifft ein Arbeitsgerät mit einer Bremseinrichtung der im Oberbegriff des Anspruchs 1 angegebenen Gattung, das aus dem Dokument
Aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Arbeitsgerät der gattungsgemäßen Art zu schaffen, das einen hohen Bedienkomfort und einen einfachen Aufbau besitzt und bei dem die Bremseinrichtung immer betätigt ist, wenn die Startanreicherungseinrichtung in einer Startstellung steht.The invention has for its object to provide a working device of the generic type, which has a high ease of use and a simple structure and in which the braking device is always actuated when the Startanreicherungseinrichtung is in a starting position.
Diese Aufgabe wird durch ein Arbeitsgerät mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a working device with the features of
Über eine Sperreinrichtung kann auf einfache Weise verhindert werden, dass die Startstellung vom Bediener eingelegt werden kann, wenn die Bremseinrichtung nicht betätigt ist. Ein Einlegen der Startstellung bezeichnet dabei ein Verstellen der Startanreicherungseinrichtung in eine Startstellung, in der die Startanreicherungseinrichtung ohne äußere Einwirkung, also auch nach Loslassen eines Betriebsartenstellers oder dergleichen, verbleibt. Kann die Startstellung nicht eingelegt werden, so weiß der Bediener, dass zunächst die Bremseinrichtung eingelegt werden muss, bevor die Startstellung eingelegt werden kann. Dadurch ist auch ein versehentliches Einlegen der Startstellung im Betrieb verhindert, da die Bremseinrichtung im Betrieb nicht aktiv ist. Über den Betriebsartensteller müssen nur die üblichen, vergleichsweise geringen Bedienkräfte zum Einlegen der Startstellung aufgebracht werden. Die Sperreinrichtung kann ebenfalls mit geringen Bedienkräften betätigt werden. Dadurch wird ein einfacher Aufbau des Arbeitsgeräts ermöglicht.About a locking device can be easily prevented that the starting position can be engaged by the operator when the braking device is not actuated. An insertion of the starting position denotes an adjustment of the Startanreicherungseinrichtung in a starting position in which the Startanreicherungseinrichtung without external action, ie after releasing a Betriebsartenstellers or the like remains. If the starting position can not be engaged, the operator knows that the braking device must first be inserted before the starting position can be inserted. As a result, accidental insertion of the starting position during operation is prevented because the braking device is not active during operation. About the mode selector only the usual, relatively low operating forces must be applied to insert the starting position. The locking device can also be operated with low operating forces. This allows a simple construction of the working device.
Vorteilhaft besitzt die Startanreicherungseinrichtung ein Ventilelement, das zwischen einer Betriebsstellung und mindestens einer Startstellung verstellbar ist. Vorteilhaft sind zwei Startstellungen, nämlich eine Warmstartstellung und eine Kaltstartstellung vorgesehen, so dass das Arbeitsgerät an die Umgebungsbedingungen und die Temperatur des Verbrennungsmotors angepasst gestartet werden kann. Das Ventilelement wird vorteilhaft von einer Fixiereinrichtung in der Startstellung gehalten. Vorteilhaft verhindert die Sperreinrichtung eine Fixierung des Ventilelements durch die Fixiereinrichtung in der Startstellung. Das Ventilelement ist vorteilhaft in Richtung auf seine Betriebsstellung gefedert gelagert und wird, wenn das Ventilelement nicht durch die Fixiereinrichtung fixiert wird, von der Federkraft in seine Betriebsstellung zurückgestellt, sobald der Bediener den Betriebsartensteller loslässt. Dadurch kann auf einfache Weise ein Einlegen der Startstellung, also eine Fixierung des Ventilelements in der Startstellung, verhindert werden.Advantageously, the start enrichment device has a valve element which is adjustable between an operating position and at least one starting position. Advantageously, two start positions, namely a hot start position and a cold start position are provided so that the implement can be started adapted to the ambient conditions and the temperature of the internal combustion engine. The valve element is advantageously held by a fixing device in the starting position. Advantageously, the locking device prevents fixation of the valve element by the fixing device in the starting position. The valve element is advantageously spring-mounted in the direction of its operating position and, when the valve element is not fixed by the fixing device, is returned to its operating position by the spring force as soon as the operator releases the mode selector. As a result, insertion of the starting position, that is to say a fixation of the valve element in the starting position, can be prevented in a simple manner.
Ein Ventilelement ist insbesondere ein mit einem Chokehebel verbundenes Chokeelement. Kann das Chokeelement nicht in seine Startstellung verstellt werden, ist in der Regel kein Starten des Verbrennungsmotors möglich. Ein Ventilelement ist vorteilhaft ein mit einem Drosselhebel verbundenes Drosselelement. Es hat sich gezeigt, dass es ausreichend ist, ein Verstellen eines Drosselelements in seine Startstellung, also üblicherweise eine leicht geöffnete Stellung, zu vermeiden, um zu erreichen, dass der Verbrennungsmotor nicht gestartet werden kann.A valve element is in particular a choke element connected to a choke lever. If the choke element can not be adjusted to its starting position, usually no starting of the internal combustion engine is possible. A valve element is advantageously a throttle element connected to a throttle lever. It has been found that it is sufficient to avoid adjusting a throttle element to its starting position, ie usually a slightly open position, in order to ensure that the internal combustion engine can not be started.
Vorteilhaft werden beim Einlegen der Startstellung das Chokeelement und das Drosselelement in eine Startstellung verstellt. Der freie Strömungsquerschnitt eines Ansaugkanals des Verbrennungsmotors, den das Drosselelement in Startstellung freigibt, ist vorteilhaft größer als der in unbetätigter Stellung des Drosselelements freigegebene Strömungsquerschnitt. Das Chokeelement verringert den Strömungsquerschnitt des Ansaugkanals in Betriebsstellung vorteilhaft nicht wesentlich. In Startstellung wird der freie Strömungsquerschnitt des Ansaugkanals durch das Chokeelement vorteilhaft sehr deutlich verringert. Vorteilhaft wirkt der Drosselhebel zur Fixierung einer Startstellung von mindestens einem Ventilelement mit dem Chokehebel zusammen. Dadurch ergibt sich ein einfacher Aufbau. Der Drosselhebel und der Chokehebel sind vorteilhaft in üblicher Weise an der Außenseite eines Vergasers des Arbeitsgeräts angeordnet.When inserting the starting position, the choke element and the throttle element are advantageously adjusted to a starting position. The free flow cross-section of an intake duct of the internal combustion engine, which releases the throttle element in the starting position, is advantageously greater than the released in the unactuated position of the throttle element flow cross-section. The choke element advantageously does not significantly reduce the flow cross-section of the intake duct in the operating position. In starting position, the free flow cross section of the intake duct is advantageously reduced very clearly by the choke element. Advantageously, the throttle lever acts to fix a starting position of at least one valve element with the choke lever together. This results in a simple structure. The throttle lever and the choke lever are advantageously arranged in the usual manner on the outside of a carburetor of the working device.
Vorteilhaft verhindert die Sperreinrichtung eine Fixierung eines Ventilelements in einer Startstellung. Die Sperreinrichtung verhindert insbesondere einen Eingriff des Drosselhebels am Chokehebel. Dadurch, dass der Drosselhebel nicht am Chokehebel eingreifen und den Chokehebel in Startstellung des Chokeelements fixieren kann, bleibt das Chokeelement nicht in der Startstellung stehen. Das Chokeelement kann demnach bis zur Startstellung verstellt werden, stellt sich jedoch nach Loslassen des Betriebsartenstellers vorteilhaft wieder in die Betriebsstellung zurück. Ein Einlegen der Startstellung, also ein Verstellen der Startanreicherungseinrichtung in eine Startstellung, in der die Startanreicherungseinrichtung ohne äußere Einwirkung verbleibt, ist nicht möglich. Alternativ kann eine Fixierung des Drosselelements in seiner Startstellung verhindert werden, insbesondere, wenn der Betriebsartensteller auf das Drosselelement wirkt. Das Drosselelement wird vorteilhaft in seiner Startstellung nicht fixiert, sondern stellt sich nach Loslassen des Betriebsartenstellers wieder in seine Betriebsstellung zurück, so dass die Startstellung nicht eingelegt werden kann, das Drosselelement also nicht ohne äußere Einwirkung in der Startstellung verbleibt. Ein einfacher Aufbau wird erreicht, wenn der Chokehebel an einer Chokewelle gelagert ist und der Drosselhebel an einer Drosselwelle. Vorteilhaft ist der Chokehebel drehfest an der Chokewelle gehalten und der Drosselhebel drehfest an der Drosselwelle. Vorteilhaft ist mindestens einer der Hebel in Längsrichtung seiner Schwenkachse verschiebbar auf seiner Welle gelagert. Die Sperreinrichtung besitzt vorteilhaft eine Verschiebekontur, die mindestens einen der Hebel in Längsrichtung seiner Schwenkachse bewegt. Dadurch kann auf einfache Weise erreicht werden, dass die Hebel nicht miteinander in Eingriff kommen können. Durch die Verschiebekontur wird vorteilhaft auch eine bereits eingelegte Startstellung wieder gelöst, wenn die Bremseinrichtung gelöst wird. Das Verschieben des Hebels erfolgt vorteilhaft entgegen der Kraft einer Feder. Die Feder ist dabei vorteilhaft eine Drehfeder, die den jeweiligen Hebel in seine unbetätigte Stellung vorspannt. Dabei ist der Drosselhebel in Richtung auf die vollständig geschlossene Stellung des Drosselelements und der Chokehebel in Richtung auf die vollständig geöffnete Stellung des Chokeelements federbelastet. Dadurch, dass der Hebel entgegen der Kraft einer Feder verstellt wird, wird der Hebel beim Zurückstellen der Sperreinrichtung, also wenn die Bremseinrichtung betätigt wird, in seine nicht ausgerückte Stellung verstellt und kann so wieder mit dem anderen Hebel in Eingriff kommen.The locking device advantageously prevents a fixation of a valve element in a starting position. The locking device prevents in particular an engagement of the throttle lever on the choke lever. Due to the fact that the throttle lever can not engage the choke lever and fix the choke lever in the starting position of the choke element, the choke element does not remain in the starting position. The choke element can therefore be adjusted to the starting position, but advantageously returns to the operating position after releasing the mode selector. Insertion of the starting position, that is to say an adjustment of the start enrichment device to a starting position in which the start enrichment device remains without external action, is not possible. Alternatively, a fixation of the throttle element in its starting position can be prevented, in particular when the mode selector acts on the throttle element. The throttle element is advantageously not fixed in its starting position, but returns after releasing the mode selector back to its operating position, so that the starting position can not be engaged, so the throttle element does not remain without external action in the starting position. A simple structure is achieved when the choke lever is mounted on a choke shaft and the throttle lever on a throttle shaft. Advantageously, the choke lever is rotatably held on the choke shaft and the throttle lever against rotation of the throttle shaft. Advantageously, at least one of the levers is slidably mounted on its shaft in the longitudinal direction of its pivot axis. The locking device advantageously has a displacement contour which moves at least one of the levers in the longitudinal direction of its pivot axis. This can be achieved in a simple way that the levers can not interfere with each other. Due to the displacement contour, an already inserted starting position is advantageously also released again when the braking device is released. The displacement of the lever is advantageously against the force of a spring. The spring is advantageously a torsion spring which biases the respective lever in its unactuated position. In this case, the throttle lever is spring-loaded in the direction of the fully closed position of the throttle element and the choke lever in the direction of the fully open position of the choke element. The fact that the lever is adjusted against the force of a spring, the lever when resetting the locking device, so when the brake device is actuated, moved to its non-disengaged position and can thus come back with the other lever into engagement.
Ein einfacher Aufbau kann auch erreicht werden, wenn die Sperreinrichtung eine Bewegung des Ventilelements in die Startstellung verhindert. Dies kann auf einfache Weise dadurch erfolgen, dass die Sperreinrichtung sich in den Bewegungsweg eines der sich beim Einlegen der Startstellung bewegenden Bauteile erstreckt. Ein einfacher Aufbau wird erreicht, wenn das Ventilelement über eine Koppelstange von dem Betriebsartensteller zu betätigen ist und die Sperreinrichtung im Verstellweg der Koppelstange angeordnet ist. Es kann jedoch auch vorgesehen sein, dass die Sperreinrichtung den Bewegungsweg des Betriebsartenstellers blockiert, beispielsweise durch Blockieren der Schaltgasse. Auch der Bewegungsweg eines mit dem Ventilelement verbundenen Hebels, insbesondere eines Chokehebels oder Drosselhebels kann durch die Sperreinrichtung gesperrt werden. Vorteilhaft ist das Ventilelement in Richtung auf seine Betriebsstellung federbelastet und schwenkt beim Loslassen des Betriebsartenstellers aufgrund der Federkraft in seine Betriebsstellung zurück.A simple construction can also be achieved if the locking device prevents movement of the valve element into the starting position. This can be done in a simple manner in that the locking device extends in the path of movement of one of the moving during insertion of the starting position components. A simple structure is achieved when the valve element is to be actuated via a coupling rod of the mode selector and the locking device is arranged in the adjustment path of the coupling rod. However, it can also be provided that the locking device blocks the path of movement of the mode selector, for example by blocking the shift gate. Also, the path of movement of a lever connected to the valve element, in particular a choke lever or throttle lever can be blocked by the locking device. Advantageously, the valve element is spring-loaded in the direction of its operating position and pivots back when releasing the mode selector due to the spring force in its operating position.
Um sicherzustellen, dass die Startanreicherungseinrichtung aus der Startstellung gelöst wird, wenn die Bremseinrichtung gelöst wird, ist vorgesehen, dass die Sperreinrichtung eine Betätigungskontur besitzt, die die Startanreicherungseinrichtung aus der Startstellung löst, wenn die Bremseinrichtung gelöst wird, während die Startanreicherungseinrichtung in Startstellung steht. Dadurch kann vermieden werden, dass ein Bediener zunächst die Startanreicherungseinrichtung in die Startstellung verstellen und anschließend die Bremse lösen kann. In diesem Fall wird auch die Startstellung der Startanreicherungseinrichtung gelöst. Die Betätigungseinrichtung für die Bremseinrichtung ist vorteilhaft ein Handschutzbügel. Das Arbeitgerät ist insbesondere ein handgeführtes Arbeitsgerät, vorteilhaft eine Motorsäge. Ein einfacher Aufbau wird erreicht, wenn die Bremseinrichtung eine Differenzialbandbremse umfasst. Eine Differenzialbandbremse wirkt selbstverstärkend und kann mit geringen Bedienkräften betätigt werden. Dadurch ergibt sich eine ergonomische Bedienung.To ensure that the start enrichment device is released from the starting position when the braking device is released, it is provided that the locking device has an actuating contour which releases the start enrichment device from the starting position when the braking device is released while the start enrichment device is in the starting position. This can be avoided that an operator first adjust the start enrichment device in the starting position and then release the brake can. In this case, the starting position of the start enrichment device is also solved. The actuating device for the braking device is advantageously a hand guard. The working device is in particular a hand-held implement, advantageously a power saw. A simple construction is achieved when the braking device comprises a differential belt brake. A differential band brake has a self-reinforcing effect and can be operated with minimal operating forces. This results in an ergonomic operation.
Ausführungsbeispiele der Erfindung werden im Folgenden anhand der Zeichnung erläutert. Es zeigen:
- Fig. 1
- eine schematische Seitenansicht einer Motorsäge,
- Fig. 2
- einen schematischen Schnitt durch die Motorsäge aus
Fig. 1 , - Fig. 3
- einen schematischen Schnitt durch die Motorsäge im Bereich der Bremseinrichtung,
- Fig. 4
- eine schematische Darstellung des Vergasers der Motorsäge aus
Fig. 1 in Betriebsstellung, - Fig. 5
- eine schematische Darstellung des Vergasers aus
Fig. 4 in Startstellung, - Fig. 6
- eine teilgeschnittene Seitenansicht eines ersten Ausführungsbeispiels der Motorsäge aus
Fig. 1 , - Fig. 7
- eine Seitenansicht in Richtung des Pfeils VII in
Fig. 6 , - Fig. 8
- den Ausschnitt VIII aus
Fig. 7 in vergrößerter Darstellung, - Fig. 9
- die Motorsäge aus
Fig. 6 bei gelöster Sperreinrichtung, - Fig. 10
- eine Draufsicht in Richtung des Pfeils X in
Fig. 9 , - Fig. 11
- den Ausschnitt XI aus
Fig. 10 in vergrößerter Darstellung, - Fig. 12
- eine teilgeschnittene Seitenansicht eines Ausführungsbeispiels der Motorsäge aus
Fig. 1 , - Fig. 13
- den Ausschnitt XIII aus
Fig. 12 in vergrößerter Darstellung, - Fig. 14
- eine Seitenansicht in Richtung des Pfeils XIV in
Fig. 12 , - Fig. 15
- den Ausschnitt XV aus
Fig. 14 in vergrößerter Darstellung, - Fig. 16
- die Motorsäge aus
Fig. 12 bei gelöster Sperreinrichtung, - Fig. 17
- eine Draufsicht in Richtung des Pfeils XVII in
Fig. 16 , - Fig. 18
- den Ausschnitt XVIII aus
Fig. 17 in vergrößerter Darstellung, - Fig. 19
- eine teilgeschnittene Seitenansicht eines weiteren Ausführungsbeispiels der Motorsäge,
- Fig. 20
- eine Draufsicht in Richtung des Pfeils XX in
Fig. 19 , - Fig. 21
- den Ausschnitt XXI aus
Fig. 20 in vergrößerter Darstellung, - Fig. 22
- die Motorsäge aus
Fig. 19 mit gelöster Sperreinrichtung, - Fig. 23
- eine Draufsicht in Richtung des Pfeils XXIII in
Fig. 22 , - Fig. 24
- den Ausschnitt XXIV aus
Fig. 23 in vergrößerter Darstellung, - Fig. 25
- eine Seitenansicht eines alternativen Ausführungsbeispiels einer Bremseinrichtung.
- Fig. 1
- a schematic side view of a power saw,
- Fig. 2
- a schematic section through the chainsaw
Fig. 1 . - Fig. 3
- a schematic section through the chainsaw in the braking device,
- Fig. 4
- a schematic representation of the carburetor of the chainsaw
Fig. 1 in operating position, - Fig. 5
- a schematic representation of the carburetor
Fig. 4 in starting position, - Fig. 6
- a partially sectioned side view of a first embodiment of the power saw from
Fig. 1 . - Fig. 7
- a side view in the direction of arrow VII in
Fig. 6 . - Fig. 8
- the neckline VIII
Fig. 7 in an enlarged view, - Fig. 9
- the chainsaw off
Fig. 6 when the locking device is released, - Fig. 10
- a plan view in the direction of arrow X in
Fig. 9 . - Fig. 11
- the cutout XI
Fig. 10 in an enlarged view, - Fig. 12
- a partially sectioned side view of an embodiment of the power saw from
Fig. 1 . - Fig. 13
- the section XIII
Fig. 12 in an enlarged view, - Fig. 14
- a side view in the direction of arrow XIV in
Fig. 12 . - Fig. 15
- the cutout XV
Fig. 14 in an enlarged view, - Fig. 16
- the chainsaw off
Fig. 12 when the locking device is released, - Fig. 17
- a plan view in the direction of arrow XVII in
Fig. 16 . - Fig. 18
- the section XVIII
Fig. 17 in an enlarged view, - Fig. 19
- a partially sectioned side view of another embodiment of the power saw,
- Fig. 20
- a plan view in the direction of arrow XX in
Fig. 19 . - Fig. 21
- the section XXI
Fig. 20 in an enlarged view, - Fig. 22
- the chainsaw off
Fig. 19 with disengaged locking device, - Fig. 23
- a plan view in the direction of arrow XXIII in
Fig. 22 . - Fig. 24
- the section XXIV
Fig. 23 in an enlarged view, - Fig. 25
- a side view of an alternative embodiment of a braking device.
Beim Starten des Verbrennungsmotors 11 muss der Bediener die Bremseinrichtung 55 (
Die Chokeklappe 38 kann über eine am Chokehebel 42 eingehängte Koppelstange 46 betätigt, also um die Schwenkachse 85 verschwenkt werden. Die Koppelstange 46 steht mit dem Betriebsartensteller 10 in Verbindung. Im Ausführungsbeispiel ist die Koppelstange 46 am Betriebsartensteller 10 gelagert. Der Betriebsartensteller 10 bildet mit der Koppelstange 46, dem Chokehebel 42 und der Chokeklappe 38 eine Startanreicherungseinrichtung des Verbrennungsmotors 11. Auch der Drosselhebel 41 ist Teil der Startanreicherungseinrichtung. Um eine Startstellung 48 der Startanreicherungseinrichtung einzustellen, muss zunächst der Drosselhebel 41 aus dem Schwenkbereich des Chokehebels 42 verschwenkt werden. Hierzu muss ein Bediener den in
Wie
Es kann auch vorgesehen sein, dass das Sperrelement 57 auf den Chokehebel 42 wirkt und den Chokehebel 42 seitlich aus dem Schwenkbereich des Drosselhebels 41 verschiebt, um ein Verrasten von Chokehebel 42 und Drosselhebel 41 zu verhindern.It can also be provided that the blocking
Die
Die
Die
Die
In
Bei den Sperreinrichtungen 56 und 76 kann zusätzlich oder alternativ zum Drosselhebel 41 auch der Chokehebel 42 in Längsrichtung seiner Schwenkachse 85 verschoben werden, um Chokehebel 42 und Drosselhebel 41 in zueinander versetzte Ebenen zu stellen und zu verhindern, dass die Hebel 41, 42 in Eingriff miteinander kommen können.In the
Die Sperreinrichtungen 66 und 76 besitzen am Sperrelement 67 bzw. am Sperrelement 77 eine Betätigungskontur 64, die in
Die Reibung zwischen Bremsband 15 und Kupplungstrommel 14 führt zu einem resultierenden Moment am Schwenkhebel 92 in Betätigungsrichtung. Sobald das Bremsband 15 an der Kupplungstrommel 14 anliegt, verstärkt sich die Bremswirkung, und das Bremsband 15 zieht sich selbsttätig an die Kupplungstrommel 14. Dadurch werden zum Einlegen der Differenzialbandbremse 91 nur sehr geringe Betätigungskräfte benötigt.The friction between the
Claims (15)
- Working implement with a tool, comprising an internal combustion engine (11) used for driving the tool, a cranking enrichment device having at least one starting position (48) and operated via a mode controller (10) for the internal combustion engine (11), a braking device (55, 90), which in the actuated position brakes the tool and in the non-actuated position releases the tool, and an actuating device for the braking device (55, 90),
characterised in that the working implement comprises a locking device (56, 66, 76), which prevents the selection of the starting position (48) in a locking position (80), wherein the braking device (55, 90) is coupled to the locking device (56, 66, 76) on such a way that the locking device (56, 66, 76) is in the locking position (80) in the non-actuated position of the braking device (55, 90). - Working implement according to claim 1,
characterised in that the cranking enrichment device comprises at least one valve element adjustable between an operating position (83) and a starting position (82, 86). - Working implement according to claim 2,
characterised in that the valve element is held in the starting position (82, 86) by a fixing device, and in that the locking device (56, 66, 76) prevents a fixing of the valve element in the starting position (82, 86). - Working implement according to claim 2 or 3,
characterised in that one valve element is a choke element connected to a choke lever (42). - Working implement according to claim 4,
characterised in that one valve element is a throttle element connected to a throttle lever (41). - Working implement according to claim 5,
characterised in that the throttle lever (41) cooperates with the choke lever (42) in fixing a starting position (82, 86) of at least one valve element. - Working implement according to claim 6,
characterised in that the locking device (56, 76) prevents an engagement of the throttle lever (41) at the choke lever (42). - Working implement according to claim 6 or 7,
characterised in that the choke lever (42) is mounted on a choke shaft (40) and the throttle lever (41) is mounted on a throttle shaft (39), at least one of the levers (41, 42) being displaceable in the longitudinal direction of its pivot axis (84, 85). - Working implement according to claim 8,
characterised in that the locking device (56, 76) has a displacement contour (47), which moves at least either the throttle lever (41) or the choke lever (42) in the direction of its pivot axis (84, 85). - Working implement according to any of claims 2 to 9,
characterised in that the locking device (66, 76) prevents a movement of a valve element into the starting position (82, 86). - Working implement according to claim 10,
characterised in that the mode controller (10) adjusts the valve element via a coupling rod (46), and in that the locking device (66, 76) is located in the traversing path of the coupling rod (46). - Working implement according to any of claims 2 to 11,
characterised in that the valve element is spring-loaded towards its operating position (83). - Working implement according to any of claims 1 to 12,
characterised in that the locking device (66, 76) has an actuating contour (64), which releases the cranking enrichment device from the starting position (48) if the braking device (55, 90) is released in the starting position (48) of the cranking enrichment device. - Working implement according to any of claims 1 to 13,
characterised in that the actuating device for the braking device (55, 90) is a finger guard (5). - Working implement according to any of claims 1 to 14,
characterised in that the braking device (90) comprises a differential band brake (91).
Applications Claiming Priority (1)
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DE102012012799.5A DE102012012799A1 (en) | 2012-06-28 | 2012-06-28 | Working device with a braking device |
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EP2679358A2 EP2679358A2 (en) | 2014-01-01 |
EP2679358A3 EP2679358A3 (en) | 2014-12-17 |
EP2679358B1 true EP2679358B1 (en) | 2016-02-03 |
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EP13002892.1A Active EP2679358B1 (en) | 2012-06-28 | 2013-06-05 | Power tool having a braking system |
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US (1) | US9470143B2 (en) |
EP (1) | EP2679358B1 (en) |
CN (1) | CN103527326B (en) |
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CN101042076B (en) * | 2006-03-23 | 2011-04-20 | 安德烈亚斯·斯蒂尔两合公司 | Carburetor arrangement for an internal combustion engine |
CN200961516Y (en) | 2006-08-16 | 2007-10-17 | 无锡威孚集团有限公司 | Fuel injection pump speed regulator for automatic start-up, thickening and loading when in idle speed |
JP4868523B2 (en) | 2007-04-04 | 2012-02-01 | 京都電機器株式会社 | Auto choke device in engine |
DE102007025376A1 (en) * | 2007-05-31 | 2008-12-04 | Andreas Stihl Ag & Co. Kg | implement |
JP2008303911A (en) | 2007-06-05 | 2008-12-18 | Toyota Motor Corp | Speed-change controller and vehicle control device |
DE102008007786A1 (en) | 2008-02-06 | 2009-08-13 | Andreas Stihl Ag & Co. Kg | Hand-held implement |
DE102009011684A1 (en) * | 2009-03-04 | 2010-09-09 | Andreas Stihl Ag & Co. Kg | Hand-held implement |
DE102010009915B4 (en) * | 2009-03-21 | 2017-09-14 | Andreas Stihl Ag & Co. Kg | carburetor arrangement |
DE102009014347B4 (en) * | 2009-03-21 | 2018-01-04 | Andreas Stihl Ag & Co. Kg | carburetor arrangement |
DE102009036372A1 (en) | 2009-08-06 | 2011-02-10 | Andreas Stihl Ag & Co. Kg | Portable hand-operated tool i.e. engine chain saw, has control unit for limiting speed of combustion engine to speed that is below coupling speed depending on state signal in operating position of starting device |
JP5278552B2 (en) | 2009-10-09 | 2013-09-04 | トヨタ自動車株式会社 | Vehicle control device |
DE102011105159B4 (en) * | 2011-06-17 | 2021-12-30 | Andreas Stihl Ag & Co. Kg | Hand-held tool |
DE102012012801A1 (en) | 2012-06-28 | 2014-01-02 | Andreas Stihl Ag & Co. Kg | implement |
DE102012012827A1 (en) | 2012-06-28 | 2014-01-02 | Andreas Stihl Ag & Co. Kg | Start safety circuit in a working device with an internal combustion engine |
DE102012012798B4 (en) | 2012-06-28 | 2014-11-13 | Andreas Stihl Ag & Co. Kg | Working device with a braking device |
DE102013009154A1 (en) * | 2013-05-31 | 2014-12-04 | Andreas Stihl Ag & Co. Kg | Hand-guided implement with an internal combustion engine |
DE102013009891A1 (en) * | 2013-06-13 | 2014-12-18 | Andreas Stihl Ag & Co. Kg | Work tool with an internal combustion engine |
-
2012
- 2012-06-28 DE DE102012012799.5A patent/DE102012012799A1/en not_active Withdrawn
-
2013
- 2013-06-05 EP EP13002892.1A patent/EP2679358B1/en active Active
- 2013-06-17 RU RU2013127179A patent/RU2629107C2/en active
- 2013-06-28 CN CN201310266120.1A patent/CN103527326B/en active Active
- 2013-06-28 US US13/929,880 patent/US9470143B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102012012799A1 (en) | 2014-01-02 |
US20140000542A1 (en) | 2014-01-02 |
EP2679358A2 (en) | 2014-01-01 |
CN103527326A (en) | 2014-01-22 |
US9470143B2 (en) | 2016-10-18 |
EP2679358A3 (en) | 2014-12-17 |
RU2629107C2 (en) | 2017-08-24 |
CN103527326B (en) | 2017-08-11 |
RU2013127179A (en) | 2014-12-27 |
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