EP3282119A1 - Manually-operated turning gear for a combustion engine and back mounted tool with a combustion engine and with a manually-operated turning gear for the combustion engine - Google Patents

Abstract

A starter device (8, 108) for an internal combustion engine (9) has a starter cable (34) on which a starter handle (35) is fixed. The launching device (8, 108) has a cable guide (38) for the Anwerfseil (34), which leads the Anwerfseil (34) of a pulley (23) of the Anwerfvorrichtung (8, 108) to a cable outlet opening (36, 136). The cable guide (38) comprises at least one deflection roller (40, 41, 42). The cable outlet opening (36, 136) is arranged on the circumference of the deflection roller (40) of the cable guide (38) and extends over a circumferential angle of the deflection roller (40) of at least 60 °. As a result, the Anwerfgriff (35) in different directions from the cable outlet opening (36, 136) emerge, allowing an ergonomic launching. The starting device (8, 108) is advantageously provided for the internal combustion engine (9) of a back-driven working device.

Description

The invention relates to a Anwerfvorrichtung for an internal combustion engine specified in the preamble of claim 1 and in the preamble of claim 11 genus and a back-worn implement with an internal combustion engine and with a starter.

From the JP 2009-189303 A is known a back-driven sprayer which is driven by an internal combustion engine. The internal combustion engine is to be started via a starter device comprising a starter cable. The Anwerfseil is guided by the arranged on a backpack back engine laterally and after in the back panel of the back plate. The starter handle protrudes forward to the side of the operator. The Anwerfseil is guided adjacent to the Anwerfgriff on a pivot bearing. By adjusting the pivot bearing, you can change the orientation of the starter handle. The structural design is relatively expensive.

The invention has for its object to provide a Anwerfvorrichtung for an internal combustion engine, which has a simple structure and allows comfortable starting of the engine at different orientations of the Anwerfgriffs. Another object of the invention is to provide a rear-wheeled work implement with an internal combustion engine and with a starting device.

This object is achieved with respect to the starting device by a starter device having the features of claim 1 or by a starter device having the features of claim 11. With regard to the back-supported working device, the object is achieved by a back-supported working device with the features of claim 12.

At the cable outlet opening a guide element is arranged, which holds the Anwerfseil in the cable outlet opening. The cable guide comprises at least one guide roller, and the cable outlet opening is arranged along a peripheral portion of the guide roller of the cable guide. The cable outlet opening extends along the peripheral portion over a circumferential angle of the guide roller of at least 60 °. The circumferential angle is advantageously more than 90 °, advantageously more than 100 °, in particular more than 110 °, preferably more than 120 °.

Characterized in that the cable outlet opening is arranged along a peripheral portion of a guide roller and extends over a circumferential angle of at least 60 °, the alignment of the Anwerfseils can be changed in the cable outlet opening by simply moving the Anwerfgriffs in the appropriate direction. This allows the longitudinal center axis of the Anwerfgriffs occupy different angles relative to a housing of the Anwerfvorrichtung. An elaborate pivot bearing for the Anwerfseil can be omitted. The deflection of the Anwerfseils is achieved via the pulley and the correspondingly arranged and dimensioned cable outlet opening.

The extent of the cable outlet opening along the peripheral portion is advantageously an extension radially directly on the circumference of the guide roller of the cable guide or an arrangement of the cable outlet opening, wherein the cable outlet opening to the periphery of the guide roller has a radial distance which is at most twice the diameter, preferably at most the diameter the pulley corresponds.

Advantageously, the guide element limits the cable outlet opening at least partially. The cable outlet opening advantageously extends over a width measured parallel to the axis of the deflection roller, which advantageously corresponds to 1 to 3 times the width of the deflection roller. The width of the cable outlet opening is preferably smaller than the width of the cable outlet opening facing the underside of the Anwerfgriffs, so that the Anwerfgriff can be supported in the axial direction with its underside on both sides of the Anwerfseils on the guide element. The cable outlet opening advantageously extends along the circumference of the deflection roller over a length which is greater than the extension of the Anwerfgriffs on the underside. As a result, the Anwerfgriff not supported in the circumferential direction with its underside or only one side on the guide element. The length of the cable outlet opening is advantageously at least 3 times as large as the width of the cable outlet opening measured parallel to the axis of the deflection roller. The cable outlet opening is preferably composed along its length of at least two sections which are at an angle to each other. The angle measured at the location of the deflection roller in the direction of the axis of the deflection roller is advantageously less than 120 °, in particular less than 90 °, preferably less than 70 °, in particular approximately 60 °. The Anwerfgriff advantageously has a first Anwerfposition, in which the Anwerfgriff is arranged in a first end position on the cable outlet opening, and a second Anwerfposition, in which the Anwerfgriff is arranged in a second end position on the cable outlet opening. In the first end position of the Anwerfgriffs the underside of the Anwerfgriffs is advantageously arranged at another of the two angularly arranged portions to each other than in the second end position.

Advantageously, the Anwerfgriff is at unopposed Anwerfvorrichtung on the guide element. The force required to contact the Anwerfgriffs on the guide element in the direction of the Anwerfseils is preferably applied by a return spring of the Anwerfvorrichtung that pulls the Anwerfgriff against the guide element. In an advantageous embodiment, the guide element is formed by a housing of the Anwerfvorrichtung. Advantageously, the Anwerfgriff is not held in a form-fitting manner on the guide element in the transverse direction of the peripheral portion, but in the direction of a Axis of the deflecting element relative to the guide element displaceable. This allows the Anwerfgriff dodge sideways, for example, when an operator gets stuck on the Anwerfgriff, whereby the forces can not be introduced into the cable guide. As a result, damage to the cable guide can be avoided.

A simple design results when the guide element is at least partially formed by a wire ring. This allows a simple and durable, low-wear design can be achieved. The wire ring does not have to have a circular shape and is designed in particular as an open, preferably as a slotted wire ring. The wire ring is advantageously fixed in a housing of the starting device. Particularly preferably, the wire ring is clipped in a housing of the starting device. The housing of the starting device preferably consists of a plastic, resulting in a low weight of the housing.

In order to avoid that the Anwerfseil slip laterally from the guide roller or can pinch between the guide element and guide roller on the side surface of the guide roller, it is advantageously provided that a measured parallel to the axis of the guide roller distance between the guide element and the side surface of the guide roller smaller than that Diameter of the starter rope is. The distance is in particular smaller than half the diameter of the starter rope. The deflection roller can be fixed in a rotationally fixed manner to a starter housing of the starting device or be formed integrally with the starting device. In order to achieve the lowest possible friction between the Anwerfseil and the guide roller, the guide roller is preferably rotatably mounted about its axis. The pivot bearing for the pulley is easy to train and requires only a small design effort. At the same time the friction between Anwerfseil and pulley can be significantly reduced. As a result, the Anwerfkräfte that are needed to crank the engine, reduced.

Advantageously, the cable guide has a second deflection roller over which the Anwerfseil is guided, wherein the second deflection roller at a cable section between the pulley and the first pulley rests. By arranging at least one second deflection roller, the Anwerfseil can be safely guided over a greater distance between the pulley and the cable outlet opening. As a result, a suitable, ergonomic position of the cable outlet opening can be achieved in a simple manner. Advantageously, the axis of the second deflection roller is arranged perpendicular to the axis of the first deflection roller. Through the two pulleys, the deflections are realized by two mutually perpendicular spatial axes. This allows a defined deflection and a good guidance of the Anwerfseils to the pulleys. Preferably, the cable guide comprises a third deflection roller, which bears against a cable section between the cable pulley and the second deflection roller on the Anwerfseil. The third deflection roller is advantageously an adjacent to the pulley of the Anwerfvorrichtung arranged deflection roller. If necessary, additional deflection rollers can be provided between the second deflection roller and the third deflection roller.

The cable guide is advantageously arranged at least partially in a cantilever arm of a starter housing. The starting device is advantageously designed as a module. Accordingly, all the components of the starting device including the cable guide are connected to each other so that they form an assembly. Thereby, the entire starter device can be mounted as a module on a working device or disassembled from a working device. In this case, the position of the cable outlet opening relative to the other components of the Anwerfvorrichtung is structurally determined in the module. The position of the cable outlet opening with respect to the other components of the starting device is advantageously not adjustable. The adjustment of the position of the Anwerfgriffs at the cable outlet opening is made by changing the position of the handle relative to the cable outlet opening and not by changing the position of the cable outlet opening with respect to other components of the Anwerfvorrichtung. A simple design results when the Anwerfvorrichtung has a starter housing on which all components of the Anwerfvorrichtung are held. The starter housing must not be a closed housing, but may be partially open and in particular for connection to a housing of the working device, for example a motor housing of the working device, be provided. The position of the cable outlet opening is advantageously fixed to the front of the starter housing. As a result, the position of the cable exit opening relative to the other components of the starting device can be predetermined in a simple manner.

Advantageously, the Anwerfvorrichtung is designed so that the Anwerfgriff is always arranged in the unactuated position in the same position, so that the operator can intuitively grip the Anwerfgriff in this position. The Anwerfgriff advantageously has a first Anwerfposition, in which the Anwerfgriff is arranged in a first end position on the cable outlet opening, and a second Anwerfposition, in which the Anwerfgriff is arranged in a second end position on the cable outlet opening. When unactuated Anwerfvorrichtung the Anwerfgriff is advantageously arranged due to the forces acting on the Anwerfseil forces in the first Anwerfposition. The design of the cable outlet opening is therefore made so that act on the Anwerfgriff in any position forces in the direction of the first end position. The Anwerfgriff advantageously has a the cable outlet opening facing bottom. The underside of the Anwerfgriffs is advantageously designed to rest on the guide element. The starter handle has a median plane containing the longitudinal central axis of the starter cord at the bottom of the launching handle and which is parallel to the axis of the first pulley. The spatial position of the center plane relative to the guide element changes with a change in the position of the Anwerfgriffs opposite the cable outlet opening. In the second starting position of the Anwerfgriff is advantageous only on the axis of the facing side of the median plane of the guide element. Because the Anwerfgriff on the side facing away from the axis of the central plane is not applied to the guide element, the Anwerfgriff can be moved in the direction of the side facing away from the median plane side and acting in the first end position due to acting in Anwerfsehol return force of a take-up.

For an alternative design of a starting device is advantageously provided that at the cable outlet opening, a guide element is arranged, which the Anwerfseil in the cable outlet opening holds, and that the cable guide comprises at least one deflecting element which is arranged on the cable outlet opening. The deflector has two tangents that intersect at an angle of less than 90 °. The peripheral portion has a minimum radius that is greater than a diameter of the starter rope.

The two tangents advantageously correspond respectively to the longitudinal direction of the Anwerfseils in the end positions of the Anwerfgriffs on the cable guide. The angle between the two tangents is the additional angle to the maximum deflection angle, around which the Anwerfseil is deflected by the deflection. The angle between the two tangents and the maximum deflection angle thus result in 180 °. The angle between the two tangents is measured at the side facing away from the cable outlet opening. Between the two tangents lies on the side at which the angle between the tangents is measured, the deflection element and one or more axes of the deflection element, around which the deflection element is bent. The starter handle is located in any position where the starter handle abuts the guide member, outside the area between the tangents where the angle between the tangents is measured.

Characterized in that the two tangents to the deflector include an angle of less than 90 °, the alignment of the Anwerfseils can be changed in the cable outlet opening by simply moving the Anwerfgriffs in the appropriate direction over an angle of more than 90 °. This allows the longitudinal center axis of the Anwerfgriffs occupy different angles relative to a housing of the Anwerfvorrichtung. An elaborate pivot bearing for the Anwerfseil can be omitted. The deflection of the Anwerfseils is achieved via the deflection and the correspondingly arranged and dimensioned cable outlet. The embodiments described for the starting device with a deflection roller can advantageously also be provided for a starting device with a deflection element.

The angle between the tangents is advantageously less than 80 °, in particular less than 70 °, preferably less than 60 °. This allows for a large variation in the orientation of the starter handle when cranking. Due to the comparatively large minimum radius of the peripheral portion of the deflector damage to the Anwerfseils, as they are to be feared during the deflection over a not or only slightly rounded edge of a cable outlet opening, avoided in a simple manner. Preferably, the minimum radius of the deflecting element is at least 8 mm, in particular at least 13 mm. The deflecting advantageously connects directly or at a small distance to the cable outlet opening. The distance between the deflecting element and the cable outlet opening is advantageously at most 4 times the minimum radius, in particular at most twice the minimum radius. In a particularly advantageous design, the deflecting element protrudes through the cable outlet opening in the cable guide. As a result, a particularly small deflection radius can be achieved.

The deflecting advantageously has an axis about which the deflecting element is bent in the radius. In this case, a constant radius is preferably provided. If the radius is not constant, it is advantageous to provide a plurality of axes arranged at a distance from one another about which the deflecting element is bent.

Also, instead of the second deflection roller and the third deflection roller deflecting elements can be provided, which are not formed as a role and are fixed in particular rotationally fixed to the front derailleur.

For a back-driven implement with an internal combustion engine and with a starting device is provided that the internal combustion engine is arranged on a backpack arrangement. The implement has a storage position in which the implement is placed on a flat, horizontal shelf. The Anwerfgriff has a first Anwerfposition, in which the Anwerfseil in the cable exit opening in Abstellposition to the storage area by an angle of less than 45 °, in particular less than 40 °, is inclined. Advantageously, the first Anwerfposition is a position in which the handle axis and / or the Anwerfseil are inclined in the cable exit opening in Abstellposition to the storage area by an angle of less than 45 °, in particular by an angle of less than 40 °. The Anwerfseil and / or the handle axis are advantageous so inclined that the distance of the Anwerfseils reduced to the storage area in the direction of the Anwerfgriff or that the Anwerfgriff has on its underside a greater distance to the storage area than on its opposite the Anwerfseil top. The starter handle also has a second launch position. In the second starting position, the starter cable in the rope outlet opening is inclined in the parking position to the vertical at an angle of less than 15 °, in particular less than 10 °. Advantageously, the second starting position is a position in which the handle axis and / or the Anwerfseil in the cable outlet opening in Abstellposition to the vertical by an angle of less than 15 °, in particular less than 10 °, are inclined. Thus, in the first launch position, the launch handle is in an approximately horizontal orientation and in the second launch position in an approximately vertical orientation. The first starting position is particularly favorable for cranking the internal combustion engine when the operator carries the implement on his back. The starter handle may be moved forwardly for launching the internal combustion engine in the first launch position relative to the operator. The second starting position is particularly favorable when the operator wants to start the engine while the implement is standing on the ground. In the second launching position, the operator can conveniently start the engine in the parking position by pulling up the launching handle. Even pulling the Anwerfgriffs inclined backwards may be advantageous. The design of the cable outlet opening thus allows both with arranged on the back of the backpack arrangement as well as parked on the floor implement ergonomic starting. The location of the cable outlet opening with respect to the backpack arrangement is advantageously immutable.

In unactuated Anwerfvorrichtung the Anwerfgriff is advantageously arranged in the first Anwerfposition. The starting device advantageously has a take-up device which generates a force in the take-up direction on the starter rope, wherein the guide element is configured such that the force of the take-up device exerts a force component on the starter handle in the direction of the first application position in the second startup position. By means of the force applied by the take-up device, in particular by a return spring, the starting handle can thereby be adjusted reliably into the first starting position.

The starting device is advantageously held with the cable guide on a common starter housing. The starter housing is formed by a motor housing of the working device, in which the internal combustion engine is arranged separately. The arrangement of the starting device including the cable guide on a separate from the motor housing starter housing the starter can be mounted as a module, so as a single module on the motor housing or disassembled from the motor housing. This simplifies the assembly of the picking device.

Fig. 1

eine schematische Darstellung eines Ausführungsbeispiels eines rückengetragenen Blasgeräts,

Fig. 2

eine schematische Schnittdarstellung entlang der Linie II-II in Fig. 1,

Fig. 3

eine schematische Schnittdarstellung durch eine Anwerfvorrichtung,

Fig. 4

eine perspektivische Darstellung der Anwerfvorrichtung,

Fig. 5

eine ausschnittsweise vergrößerte Darstellung des Anwerfgriffs und der Seilaustrittsöffnung aus Fig. 4,

Fig. 6

eine Seitenansicht der Anwerfvorrichtung,

Fig. 7

eine vergrößerte Schnittdarstellung des Bereichs des Anwerfgriffs und der Seilaustrittsöffnung aus Fig. 6,

Fig. 8

eine Draufsicht auf die Anwerfvorrichtung in Richtung des Pfeils VIII in Fig. 6,

Fig. 9

eine Seitenansicht in Richtung des Pfeils IX in Fig. 6,

Fig. 10

eine vergrößerte Darstellung des Bereichs des Anwerfgriffs aus Fig. 9,

Fig. 11

eine Seitenansicht entsprechend der Darstellung in Fig. 9 bei abgenommener Abdeckung an der dritten Umlenkrolle,

Fig. 12

eine perspektivische Darstellung der Anwerfvorrichtung,

Fig. 13

eine perspektivische Darstellung der Seilführung der Anwerfvorrichtung bei nur teilweise gezeigtem Anwerfergehäuse,

Fig. 14

eine ausschnittsweise vergrößerte Darstellung der Anordnung aus Fig. 13,

Fig. 15

eine Seitenansicht der Seilführung bei nur teilweise gezeigtem Anwerfergehäuse,

Fig. 16

einen Schnitt durch die Anordnung aus Fig. 15,

Fig. 17

eine Draufsicht in Richtung des Pfeils XVII in Fig. 15,

Fig. 18

eine perspektivische Darstellung der Anwerfvorrichtung mit dem Anwerfgriff in einer zweiten Anwerfposition,

Fig. 19

eine ausschnittsweise perspektivische Darstellung des Bereichs des Anwerfgriffs aus Fig. 18,

Fig. 20

eine Seitenansicht des Bereichs des Anwerfgriffs aus den Fig. 18 und 19,

Fig. 21

eine Schnittdarstellung durch den Anwerfgriff aus Fig. 20,

Fig. 22

eine perspektivische Darstellung der Anordnung aus den Fig. 18 bis 21 mit nur teilweise dargestelltem Anwerfergehäuse,

Fig. 23

eine Seitenansicht der Anordnung aus Fig. 22,

Fig. 24

einen Schnitt durch die Anordnung aus Fig. 23,

Fig. 25

eine perspektivische Darstellung des Bereichs der Seilaustrittsöffnung mit nicht gezeigtem Anwerfgriff,

Fig. 26

einen Schnitt durch die Anordnung aus Fig. 25,

Fig. 27

eine Seitenansicht in Richtung des Pfeils XXVII in Fig. 26,

Fig. 28

eine Seitenansicht in Richtung des Pfeils XXVIII in Fig. 26,

Fig. 29

eine Seitenansicht eines weiteren Ausführungsbeispiels eines Blasgeräts,

Fig. 30

eine Draufsicht in Richtung des Pfeils XXX in Fig. 29,

Fig. 31

eine Seitenansicht in Richtung des Pfeils XXXI in Fig. 29,

Fig. 32

eine perspektivische Darstellung des Bereichs des Anwerfgriffs des Blasgeräts aus Fig. 29,

Fig. 33

eine Seitenansicht der Anwerfvorrichtung des Blasgeräts aus Fig. 29,

Fig. 34

eine Seitenansicht gemäß Fig. 33, wobei der Anwerfgriff nicht dargestellt ist,

Fig. 35

eine Schnittdarstellung durch die Anwerfvorrichtung im Bereich der ersten und der zweiten Umlenkrolle mit Anwerfgriff,

Fig. 36

einen Schnitt entsprechend Fig. 35, wobei der Anwerfgriff nicht dargestellt ist,

Fig. 37

eine ausschnittsweise schematische Schnittdarstellung eines weiteren Ausführungsbeispiels einer Seilführung in einer ersten Anwerfposition des Anwerfgriffs,

Fig. 38

eine schematische Schnittdarstellung entlang der Linie XXXVIII-XXXVIII in Fig. 37,

Fig. 39

eine ausschnittsweise schematische Schnittdarstellung eines weiteren Ausführungsbeispiels in einer ersten Anwerfposition des Anwerfgriffs,

Fig. 40

eine ausschnittsweise schematische Schnittdarstellung des Ausführungsbeispiels aus Fig. 39 in einer zweiten Anwerfposition des Anwerfgriffs,

Fig. 41

eine ausschnittsweise schematische Schnittdarstellung des Ausführungsbeispiels aus Fig. 40 in teilweise herausgezogener Position des Anwerfgriffs.

An embodiment of the invention will be explained below with reference to the drawing. Show it:

Fig. 1

a schematic representation of an embodiment of a back-carried blower,

Fig. 2

a schematic sectional view taken along the line II-II in Fig. 1 .

Fig. 3

a schematic sectional view through a starter device,

Fig. 4

a perspective view of the starting device,

Fig. 5

a partial enlarged view of the Anwerfgriffs and the cable outlet opening Fig. 4 .

Fig. 6

a side view of the starting device,

Fig. 7

an enlarged sectional view of the area of the Anwerfgriffs and the rope outlet opening Fig. 6 .

Fig. 8

a plan view of the starter device in the direction of arrow VIII in Fig. 6 .

Fig. 9

a side view in the direction of arrow IX in Fig. 6 .

Fig. 10

an enlarged view of the area of the Anwerfgriffs from Fig. 9 .

Fig. 11

a side view as shown in Fig. 9 with removed cover on the third pulley,

Fig. 12

a perspective view of the starting device,

Fig. 13

a perspective view of the cable guide the Anwerfvorrichtung with only partially shown Anwerfergehäuse,

Fig. 14

a fragmentary enlarged view of the arrangement Fig. 13 .

Fig. 15

a side view of the cable guide with only partially shown starter housing,

Fig. 16

a section through the arrangement Fig. 15 .

Fig. 17

a plan view in the direction of arrow XVII in Fig. 15 .

Fig. 18

a perspective view of the starting device with the Anwerfgriff in a second start position,

Fig. 19

a fragmentary perspective view of the area of the Anwerfgriffs Fig. 18 .

Fig. 20

a side view of the area of the Anwerfgriffs from the FIGS. 18 and 19 .

Fig. 21

a sectional view through the Anwerfgriff Fig. 20 .

Fig. 22

a perspective view of the arrangement of the Fig. 18 to 21 with only partially shown starter housing,

Fig. 23

a side view of the arrangement Fig. 22 .

Fig. 24

a section through the arrangement Fig. 23 .

Fig. 25

a perspective view of the area of the cable outlet opening with not shown Anwerfgriff,

Fig. 26

a section through the arrangement Fig. 25 .

Fig. 27

a side view in the direction of arrow XXVII in Fig. 26 .

Fig. 28

a side view in the direction of arrow XXVIII in Fig. 26 .

Fig. 29

a side view of another embodiment of a blower,

Fig. 30

a plan view in the direction of arrow XXX in Fig. 29 .

Fig. 31

a side view in the direction of arrow XXXI in Fig. 29 .

Fig. 32

a perspective view of the area of the Anwerfgriffs of the blower Fig. 29 .

Fig. 33

a side view of the starting device of the blower Fig. 29 .

Fig. 34

a side view according to Fig. 33 where the starter handle is not shown,

Fig. 35

a sectional view through the Anwerfvorrichtung in the region of the first and the second pulley with Anwerfgriff,

Fig. 36

a cut accordingly Fig. 35 where the starter handle is not shown,

Fig. 37

1 is a fragmentary schematic sectional view of a further embodiment of a cable guide in a first starting position of the Anwerfgriffs,

Fig. 38

a schematic sectional view taken along the line XXXVIII-XXXVIII in Fig. 37 .

Fig. 39

1 is a fragmentary schematic sectional view of a further embodiment in a first starting position of the Anwerfgriffs,

Fig. 40

a fragmentary schematic sectional view of the embodiment Fig. 39 in a second starting position of the starter handle,

Fig. 41

a fragmentary schematic sectional view of the embodiment Fig. 40 in partially pulled-out position of the Anwerfgriffs.

Fig. 1 shows as an exemplary embodiment of a back-worn implement a blower 1. The back-worn implement may also be another combustion engine driven implement such as a sprayer, a suction device, a brushcutter with a motor unit backed or the like. The blower 1 has a back support 2, which comprises a back plate 4 and a bottom plate 5. Fig. 1 shows the blower 1 in a parking position 50, in which the blower 1 is arranged with the bottom plate 5 on a flat, horizontal shelf 51. In the exemplary embodiment, a plurality of Abstellfüße 53 are provided on one of the shelf 51 facing bottom 52 of the blower 1, which is formed on the bottom plate 5, with which the blower 1 is on the shelf 51. In Abstellposition 52 is a carrying handle 3 in the upper region of the working device, in particular on the back plate 4 or a fan coil 10, respectively.

The blower 1 has a motor housing 7, in which an internal combustion engine 9 is arranged. The internal combustion engine 9 is advantageously a single-cylinder engine, in particular a two-stroke engine or a mixture-lubricated four-stroke engine. To start the engine 9 is a Anwerfvorrichtung 8. The engine 9 drives in Fig. 2 shown impeller 12, which promotes a working air flow through the fan coil 10 in a connected to the fan coil 10 blow pipe 11. At the blowpipe 11 is usually a in Fig. 1 not shown handle fixed with which the operator can lead the blowpipe 11. The Anwerfvorrichtung 8 has a Anwerfgriff 35, whose position in Fig. 1 is shown schematically. The Anwerfgriff 35 is in the embodiment laterally adjacent to the back plate 4, preferably in a lower region of the back plate 4, respectively.

Fig. 2 shows the blower 1 schematically on an operator 18. The operator 18 carries the blower via straps 6, which are fixed to the backpack 2. The motor housing 7 is advantageously held vibration-decoupled via anti-vibration elements 17 on the back support 2. In the exemplary embodiment, the fan coil 10 is arranged adjacent to the back plate 4 and the internal combustion engine 9 on the side facing away from the back plate 4 side of the fan coil 10. The internal combustion engine 9 has a cylinder 13 in which a piston 14 is reciprocally mounted. The piston 14 drives a rotatably mounted in a crankcase 16 crankshaft 15. The impeller 12 is rotatably connected to the crankshaft 15 and is driven by the crankshaft 15 rotating. In the exemplary embodiment, below the motor housing 7, a fuel tank 19 is fixed to the back support 2, in particular to the bottom plate 5 of the back support 2.

Fig. 3 shows an example of the structure of a cable starter 76 a Anwerfvorrichtung 8. However, the starter 8 may also include a pull starter 76 of different design. The starter device 8 has a starter housing 20, on which a bearing shaft 21 of the starter device 8 is held. On the bearing shaft 21, a pulley 23 is rotatably mounted about a rotation axis 48. The axis of rotation 48 is the longitudinal center axis of the bearing shaft 21. Between the starter housing 20 and the pulley 23 acts a return spring 22, which restores the pulley 23 to its original position as soon as the operator 18 releases the starter handle 35. The starter device 8 in the exemplary embodiment also comprises a spring 28, which is arranged in a spring housing 27 and is arranged in operative connection between the pulley 23 and the crankshaft 15. The spring stores the energy of one or more Anwerfhübe for starting the engine 9. The spring 28 is a coil spring in the embodiment. However, the spring 28 may also be another spring, in particular a helical spring. The pulley 23 has a diameter i, which corresponds to the largest diameter of the pulley 23.

In Fig. 3 is shown as an embodiment of a recoil starter 67, in which the energy stored in the spring 28 over several Anwerfhübe a in Fig. 3 Not shown Anwerfseils can be stored. For this purpose, a first coupling means 24 is provided in operative connection between the pulley 23 and the spring housing 27, which produces a rotationally fixed connection to the spring housing 27 in a direction of rotation of the pulley 23 in Anwerfrichtung. In the opposite direction, the first coupling device 24 acts as a freewheel and allows a reverse rotation of the pulley 23 relative to the spring housing 27. To avoid that the spring 28 relaxes when turning back the pulley 23, a second coupling device 16 is provided. The second coupling device 26 prevents a rotation of the spring housing 27 counter to the Anwerfrichtung and allows a rotation in Anwerfrichtung. In the exemplary embodiment, the spring 28 is connected at one end to the spring housing 27 and at its other end with a driver 29. The driver 29 is connected via a third coupling device 30, in particular indirectly via a flywheel 31 with the crankshaft 15 of the internal combustion engine.

The Fig. 4 to 27 show the structural design of the starting device 8 in detail. The description of the spatial position of the Anwerfvorrichtung 8 takes place with respect to a coordinate system that also in the Fig. 1, 2 , and 3 is drawn. As Fig. 1 shows, the axis y in Abstellposition 52 vertically upward. The axis z extends horizontally in the parking position 52. As Fig. 1 combined with Fig. 3 shows the axis z in the embodiment perpendicular to the axis of rotation 48 of the pulley 23. However, another orientation of the axis of rotation 48 may be advantageous. The axis z is directed to the side on which the handle 35 is located. In Fig. 1 the axis of rotation 48 is also shown. As Fig. 2 shows, the axis x is perpendicular to the axes y and z and of the crankshaft 15 in the direction of the bearing shaft 21 (FIG. Fig. 3 ). The axes x, y and z span a Cartesian coordinate system.

As Fig. 4 shows, the starter housing 20 has a laterally, in particular diagonally from the plane of the pulley 23 cantilevered arm 39. On the arm 39, a cable outlet opening 36 is arranged, through which the Anwerfseil 34 projects and abuts the Anwerfgriff 35. The Anwerfgriff 35 is remote from the pulley 23 is arranged. The Anwerfseil 34, which is wound on the circumference of the pulley 23 and is pulled at the start of the engine over the Anwerfgriff 35 to enable the pulley 23 in rotation, is guided via a cable guide 38 from the pull starter 76 to the cable outlet opening 36.

As Fig. 4 Also shows, a peripheral wall 33 is arranged on the front derailleur housing 20, which surrounds the pull starter 76 and thus protects against contamination. On the outer side of the peripheral wall 33 in the exemplary embodiment fixing domes 49 are arranged, via which the front-end 20 on the motor housing 7 of the blower 1 ( Fig. 1 ) can be screwed. Characterized in that the arm 39 is formed on the front derailleur housing 20 and fixedly connected thereto, the entire assembly can be fixed as a unit to the motor housing 7. The position of the cable outlet opening 36 relative to the other components of the starting device 8, in particular with respect to the bearing shaft 21 and the pulley 23 of the cable pull starter 76 (FIG. Fig. 3 ), is given by the design of the front of the body 20 structurally fixed. The arm 39 has a first portion 54 which is formed as in the y-direction, ie in Abstellposition 50 upwardly open shell and comes in mounted on the motor housing 7 state at the bottom of a portion of the motor housing 7 to the plant and of the Motor housing 7 is at least partially closed. The arm 39 also has a second portion 55 which is formed in the embodiment in cross-section approximately U-shaped and laterally on the outside of the motor housing 7 comes to rest. Fig. 4 shows the Anwerfgriff 35 in a first launch position 43, in which the Anwerfgriff 35 in Abstellposition 50 (FIG. Fig. 1 ) is aligned approximately horizontally.

Fig. 5 shows the design of the cable outlet opening 36 in detail. The cable outlet opening 36 has in the exemplary embodiment an approximately rectangular cross-section with two longitudinal sides and two narrow sides. At the cable outlet opening 36, a guide member 37 is arranged, which limits the cable outlet opening 36. The guide member 37 is disposed on the front-end 20. The guide element 37 may be formed completely or partially by the front-end 20. In the exemplary embodiment, a housing-fixed part 57 of the guide member 37 is provided which is formed on the front-end 20. The housing-fixed part 57 limits the cable outlet opening 36 only on a second narrow side, which is closer to the Anwerfgriff 35 in the second end position of the Anwerfgriffs 35. In the exemplary embodiment, a further part of the guide element 37 is formed by an insert part, which is attached to the front derailleur 20 advantageously replaceable. The insert defines at least the longitudinal sides of the cable outlet opening 36 and a first narrow side, which is closer to the Anwerfgriff 35 in the first end position of the Anwerfgriffs 35.

If the starter handle 35 is not pulled in the plane of the first guide roller 40, the cable can rub against the part of the guide element 37 that is designed as an insert part. In order to minimize the friction and to prevent cutting of the Anwerfseils 34 in the guide member 37, the edges of the insert are rounded. The insert is advantageously formed of a different material than the front derailleur housing 20. The insert is advantageously formed as a slotted and bent around the axis 45 wire ring 72. The insert is in the embodiment of a metallic bent part. The slot of the wire ring 72 is located on the second narrow side of the cable outlet opening 36. In a lifting stroke, the second narrow side is usually not contacted by Anwerfseil 34. The wire ring is held in particular with slight bias on the front derailleur housing 20.

Fig. 6 shows a side view of the starter 8. How Fig. 6 shows, the arm 39 extends in this side view substantially in the x direction. In the y-direction, the arm 39 has only a small extension. The starter housing 20 has a Cover section 56, on which the peripheral wall 33 is fixed and on which also the bearing shaft 21 (FIG. Fig. 4 ) is fixed. The arm 39 projects from the lid portion 56. As Fig. 6 shows, the cable outlet opening 36 in Abstellposition 50, the in Fig. 6 shown position of the starting device 8, below the axis of rotation 48, that is closer to the shelf 51, respectively. In the y-direction, the cable outlet opening 36 has a distance b from the axis of rotation 48. The distance b is greater than one quarter of the diameter i of the pulley 23 (FIG. Fig. 3 ). In the exemplary embodiment, the distance b is approximately half the diameter i. As Fig. 6 Also shows, is a arm 39 facing the bottom 65 of the Anwerfgriffs 35 at the cable outlet opening 36, namely in the view in Fig. 6 invisible guide element 37, on. At the bottom 65 enters the Anwerfseil 34 in the Anwerfgriff 35 a. The cable guide 38 has in the embodiment, a guide roller 40 which is rotatably mounted about an axis 45. The deflection roller 40 may also be rigidly connected to the front-end housing 20. The Anwerfseil 43 has in the adjoining the Anwerfgriff 35 section a longitudinal central axis 64. In the exemplary embodiment, the longitudinal central axis 64 coincides with the longitudinal center axis of the Anwerfgriffs 35. The longitudinal central axis 64 extends in the in Fig. 6 In the parking position 50, the longitudinal central axis 64 in the exemplary embodiment with the storage surface 51 advantageously forms an angle of less than 15 °, in particular less than 10 °.

Fig. 7 shows the design of the cable outlet opening 36 in detail. The cable outlet opening 36 extends in the embodiment along the circumference and in the axial direction of the guide roller 40. The cable outlet opening 36 extends along a peripheral portion 84 over a circumferential angle α to the first guide roller 40, which is at least 60 °. The circumferential angle α is measured about the axis 45 of the first guide roller 40 between the connecting lines of the ends of the cable outlet opening 36 with the axis 45. The circumferential angle α is thus measured between two radial to the axis 45, each of the axis 45 to a respective tangentially outer end the cable outlet opening 36 extend. The circumferential angle α is advantageously at least 60 °, in particular at least 90 °, advantageously at least 100 °, preferably at least 110 °. In the exemplary embodiment, the circumferential angle α is more than 120 °. The cable outlet opening 36 extends arcuately at least in a central portion. At the bottom 65 ( Fig. 7 ) runs the outlet opening 36 and the guide member 37 in the in Fig. 7 In the exemplary embodiment, the underside 65 of the Anwerfgriffs 35, the cable outlet opening 36 and the cable outlet opening 36 limiting guide member 37 extend in the area adjacent to the bottom 65 in the y-direction.

In the exemplary embodiment, the cable outlet opening 36 has a first section 82 and a second section 83. In a first end position, the starter handle 35 faces the first section 82 with its underside 65 and faces the second section 83 in a second end position. The first section 82 and the second section 83 are arranged at an angle to each other about the axis 45. The sections 82 and 83 enclose an angle δ which is advantageously less than 90 °, preferably less than 70 °, in particular approximately 60 °. In the embodiment, an angle δ of about 90 ° is provided. Advantageously, the sections 82 and 83 are flat, and there is an arcuate portion between them, which approximately follows the circumference of the guide roller 40. In the exemplary embodiment, the first section 82 and the second section 83 have different distances from the axis 45 of the deflection roller 40. In the exemplary embodiment, the first section 82 is closer to the axis 45 than the second section 83. A course of the cable exit opening 36 that follows the circumference of the deflection roller 40 exactly may also be advantageous. In the exemplary embodiment, the deflection roller 40 is not over the cable outlet opening 36 via. As Fig. 7 Also shows, the first guide roller 40 has a distance f to a second deflection roller 41 described in more detail below.

Fig. 8 shows the Anwerfvorrichtung 8 in a plan view in the y direction. As Fig. 8 shows, the cable outlet opening 36 to the axis of rotation 48 of the pulley 23 has a distance c in the z-direction. The distance c is advantageously greater than the diameter i of the pulley 23. In the exemplary embodiment, the distance c is more than twice, advantageously more than 2.5 times the diameter i (FIG. Fig. 3 ). In the x direction, the cable outlet opening 36 to the bearing shaft 21 has a distance h. The distance h is advantageously comparatively large and is more than the diameter i of the pulley 23. In the exemplary embodiment, the distance h in the x-direction is about 1.5 times to 2 times the diameter i of the pulley 23. The distance h is the end face the bearing shaft 21 measured. The center 78 of the guide roller 40 and the center 79 of the pulley 23 have a distance e from each other, which is advantageously at least 1.5 times, in particular at least twice the diameter i of the pulley 23. The centers 78 and 79 are the geometric centers of pulley 40 and pulley 23rd

The cable guide 38 also comprises the second deflection roller 41 (FIG. Fig. 13 ) whose axis 46 in Fig. 8 is shown. As Fig. 8 shows, the axes 45 and 46 of the guide rollers 40 and 41 are perpendicular to each other. The axis 45 of the deflection roller 40 extends in the z-direction and the axis 46 of the deflection roller 41 in the y-direction. The coordinate system can also be spanned by the axes 45 and 46, in particular in the other position of the axes 45 and 46 with respect to the Abstellposition 50. In this case, the z-direction is in the direction of the axis 45 and the y-direction in the direction of the axis 46th . As Fig. 8 Also shows, the Anwerfseil 34 is coming from the pulley 23 to the second guide roller 41 with respect to the axis of rotation 48 of the pulley 23 at an angle γ, which opens to the Anwerfgriff 35 out and in the xz plane, the in Fig. 8 is shown, from 20 ° to 80 °, advantageously from 40 ° to 75 °. In the exemplary embodiment, the angle γ is approximately 60 °.

In Fig. 9 schematically, a third guide roller 42 is shown, which is disposed adjacent to the pulley 23 and in the embodiment below the pulley 23. The third deflection roller 42 has a distance to the pulley 23. The third deflection roller 42 has an axis 47. In the exemplary embodiment, all deflection rollers 40, 41, 42 about their respective axes 45, 46, 47 are rotatable. However, the pulleys 40, 41 and 42 may also be rigidly connected to the front derailleur housing 20. In Abstellposition 50, the axis 47 of the third guide roller 42 is advantageously closer to the shelf 51 than the axis 45 of the first guide roller 40. Advantageously, all deflection rollers 40, 41 and 42 in Abstellposition 50 closer to the shelf 51 as the pulley 23. Suitably all pulleys 40, 41 and 42 between two planes 110 and 111, which are oriented parallel to the shelf 51 and which have a distance n to each other, which is smaller than half the diameter i of the pulley 23. The distance f between the first deflection roller 40 and the second deflection roller 41 (FIG. Fig. 7 ) and the distance 1 between the third guide roller 42 and the pulley 23 are advantageously smaller than the diameter i of the pulley 23, in particular smaller than half the diameter i. In the Fig. 9 schematically drawn second guide roller 41 and in Fig. 9 schematically drawn third guide roller 42 have a distance m from each other. The distance m between the second deflection roller 41 and the third deflection roller 42 is advantageously at least twice as large as each of the distances f and 1.

As Fig. 10 shows, the guide member 37 extends on both longitudinal sides of the cable outlet opening 36. The guide roller 40 is arranged in particular centrally between the two longitudinal sides of the guide member 37. The arrangement of a receptacle 69 for the guide member 37 on both longitudinal sides of the cable outlet opening 36 is in Fig. 28 shown.

As Fig. 11 shows, the third guide roller 42 in the y-direction has a distance from the axis of rotation 48. The axis 47 of the third guide roller 42 has the axis 48 a distance g, which is slightly larger than half the diameter i of the pulley 23 in the embodiment. The third guide roller 42 is adjacent to the peripheral wall 33 at the Outside of the peripheral wall 33 is arranged. The third deflection roller 42 is further away from the Anwerfgriff 35 than the rotation axis 48 in the z-direction. The third deflection roller 42 has the axis of rotation 48 in the z-direction a distance e, which in the embodiment is smaller than the diameter i, in particular less than half Diameter i, is. The distance e is advantageously 0.1 times to 0.4 times the diameter i.

Fig. 12 shows the design of the starter housing 20 in detail. The starter housing 20 comprises a first housing part 58, which essentially forms the cover section 56 and the peripheral wall 33 and the fastening domes 49. On the first housing part 58, the bearing shaft 21 of the Anwerfvorrichtung 8 are held together with all stored on the bearing shaft 21 components and the third guide roller 42. The deflection roller 42 covering the area of the first housing part 58 is in the Fig. 11 and 12 not shown, but in Fig. 9 recognizable. On the first housing part 58, a connection piece 60 (FIG. Fig. 13 ), which projects into a connection pocket 77 of the arm 39. The connecting piece 60 is designed as a hollow profile, in the exemplary embodiment with an approximately rectangular cross-section, such as Fig. 13 shows. A second housing part 59 forms the arm 39. The separation point between the first housing part 58 and the second housing part 59 is approximately midway between the second guide roller 41 and the third guide roller 42. The second housing part 59 is inserted into a receiving groove 61 of the first housing part 58, and the first housing part 58 protrudes with its connection piece 60 into the connection pocket 77 of the second housing part 59. The housing parts 58 and 59 are thereby held positively in the x-direction and in the y-direction. For fixing the arm 39, an extension 80 is provided, which in a receptacle 81 (FIG. Fig. 32 ) is plugged into the fan spiral 10. The receptacle 81 is in Fig. 32 for a blower 101 and provided on the blower 1 in a corresponding manner.

On the second housing part 59, a screw dome 63 is advantageously formed, with which the starter housing 20 can likewise be screwed to the motor housing 7 or to the fan spiral 10. For the further embodiment, the arrangement of Screw dome 63 on the fan spiral 10 in Fig. 31 shown. By fixing the two housing parts 58 and 59 on the motor housing 7 and / or on the fan spiral 10, an additional securing position of the two housing parts 58 and 59 to each other is achieved. As Fig. 12 Also shows, in the second section 55 in the region of the second guide roller 41 stiffening ribs 62 are formed in the second housing part 59. The stiffening ribs 62 simultaneously form a contact surface for the second deflection roller 41.

Fig. 13 shows the configuration of the receiving groove 61 and the connecting piece 60. The second housing part 59 is not shown, so that the position of the guide rollers 40 and 41 to each other and the design of the inserted part of the guide member 37 is clearly visible. The deflection rollers 40, 41 and 42 ( Fig. 12 ) are part of the cable guide 38. Also, the guide member 37, on which the cable outlet opening 36 is formed, is part of the cable guide 38th

As Fig. 14 shows the guide member 37 is advantageously formed in the Anwerfseil 34 preferably contacting area of an angled wire ring 72. In the exemplary embodiment, the wire ring 72 has a shape deviating from the circular shape. The wire ring 71 may preferably be interrupted, in particular slotted. The wire ring 72 has two legs 73 and 74, which extend at a distance k to each other. The distance k is advantageously constant over at least 50%, in particular at least 80%, of the length of the legs 73 and 74. The distance k corresponds to the width of the cable outlet opening 36. The two legs 73 and 74 extend in a viewing direction in the x direction congruent one above the other, such as Fig. 15 combined with Fig. 14 shows. As Fig. 15 Also, the two legs 73 and 74 are in the area where the Anwerfgriff 35 abuts in the first staring position 43, connected to each other via a connecting sheet 75. In the first starting position 43, the starter handle 35 is in a first end position. This is in Fig. 15 shown. The bottom 65 of the first Anwerfgriffs 35 is located on the guide member 37, namely on the connecting sheet 75 and the adjacent to the connecting sheet 75 arranged Areas of legs 73 and 74 (FIG. Fig. 15 ) at. Opposite to the connecting bow 75 of the wire ring 72 is slotted.

As Fig. 16 shows, the Anwerfgriff 35 has a median plane 68 which is parallel to the axis 45 of the first guide roller 40 and which includes the longitudinal center axis 64 of the Anwerfseils 34 at the bottom 65. The underside 65 has a first side 66, which is arranged on the axis 45 of the first guide roller 40 facing side of the median plane 68. The underside 65 also has a second side 67, which is arranged on the side 45 remote from the axis of the median plane 68. As Fig. 16 shows the bottom 65 in the first end position of the Anwerfgriffs 35 with both the first side 66 and the second side 67 on the guide member 37 at. The first starting position 43 is thereby a stable end position for the Anwerfgriff 35. The FIGS. 15 and 16 also show the vertical orientation of the axes 45 and 46 to each other. The axis 45 runs parallel to the z-direction and the axis 46 parallel to the y-direction. As Fig. 16 Also shows, the peripheral portion 84, along which the cable outlet opening 36 extends, has a radius r. The radius r is constant in the embodiment due to the circular cross section of the guide roller 40. However, another cross section of the peripheral portion 84 may be advantageous. The radius r denotes the minimum radius in the peripheral portion 84, on which the cable outlet opening 36 extends. The radius r is advantageously at least 8 mm, in particular at least 13 mm. The radius r is greater than a diameter d ( Fig. 17 ) of the Anwerfseils 34. In the exemplary embodiment, the radius r is greater than twice the diameter d of the Anwerfseils 34th

As Fig. 17 shows, has the guide roller 40 seen in the y direction, ie in a plan view of an xz plane, as shown in Fig. 17 is shown, the guide member 37 a measured parallel to the axis 45 distance a. The distance a is advantageously smaller than the diameter d of the Anwerfseils 34. In the embodiment, the distance a is significantly smaller than the diameter d. The distance a is advantageously less than half, in particular less than a quarter of the diameter d. The distance a is from the Guide element 37, in particular of a leg 73, 74 of the guide member 37, measured to a side surface of the first guide roller 40 in the direction of the axis 45. Jamming of Anwerfseils 34 between the side surfaces of the guide roller 40 and the guide member 37 is thereby avoided.

The Fig. 18 to 24 show the starter handle 35 in a second launch position 44. In the second crank position 44, the operator can place the starter handle 35 in the parking position 50 (FIG. Fig. 1 ) of the blower 1 easily pull up. As the FIGS. 19 and 20 show the longitudinal center axis 64 of the Anwerfseils 34 immediately adjacent to the Anwerfgriff 35 in the second starting position 44 in the parking position 50 vertically. The longitudinal center axis 64 of the Anwerfseils 34 may extend in the second starting position 44 also inclined away from the pulley 23. With the vertical, the longitudinal central axis 64 thus closes in the parking position 50 at an angle of less than 15 °, in particular less than 10 °. As Fig. 20 shows, the underside of the Anwerfgriffs 65 is in the second Anwerfposition 44 only with the first side 66 on the guide member 37 (FIG. Fig. 19 ) at. The second page 67 is free. The underside of the Anwerfgriffs 65 is at most over half of its circumference on the guide member 37 at. At a pulling force on the starter rope 34, as represented by the return spring 22 (FIG. Fig. 3 ) is applied, the starter handle 35 is thereby retracted to the first launch position 43. The second starting position 44 is an end position of the Anwerfgriffs 35 in the embodiment.

As Fig. 21 shows, the guide member 37 extends in the contact region of the bottom 65 on the guide member 37 at an angle β to the longitudinal central axis 64 of the Anwerfseils 34 which is smaller than 90 °. The angle β opens on the side facing away from the axis 45 and the Anwerfgriff 35 side. The angle β is measured outside the cable exit opening 36 on the deflection roller 40 facing away from the cable exit opening 36. Due to the oblique course of the guide element 37 in the region in which the Anwerfgriff 35 abuts in the second starting position 44, a pulling force at Anwerfseil 34 causes an adjustment of the Anwerfgriffs 35 in the first Anwerfposition 43. The location of the Anwerfgriffs 35 in the second starting position 44 is also in the FIGS. 22 to 24 shown.

The Fig. 25 to 28 show the arrangement without the Anwerfgriff 35, wherein the Anwerfseil 34 is disposed in the first Anwerfposition associated layer. The replaceable part of the guide element 37, which is formed in the embodiment by the wire ring 72, is not shown. As the Fig. 25 to 27 show, a receptacle 69 for the replaceable part of the guide member 37 is provided on the second housing part 59. The receptacle 69 is formed as a circumferential groove surrounding the cable outlet opening 36. In the region of the second narrow side of the cable outlet opening 36, which is closer to the Anwerfgriff 35 in the second end position of the Anwerfgriffs 35, the receptacle 69 narrows towards the outside and in particular has an undercut. In the region of the second narrow side of the cable outlet opening 36, the housing-fixed part 57 of the guide element 37 is located. As a result, the guide element 37 can be clipped into the receptacle 69. The ends of the insert are adjacent to the second narrow side and do not contact the Anwerfseil 34. The insert is mounted in particular with slight bias on the front derailleur housing 20. The insert is advantageously clamped in the undercut. The legs of the insert are for mounting on the front derailleur 20 advantageously pressed toward each other in the undercut and springs apart after releasing them again. The ends of the insert, so the wire ring 72, define a slot 71 formed between the ends. The slot 71 facilitates assembly. As a result, a positive fixing of the guide element 37 is achieved in a simple manner. The positive fixation is advantageously carried out in the region of the second narrow side. However, another fixation of the guide member 37 on the front derailleur housing 20 may be advantageous.

As the FIGS. 27 and 28 show, the first guide roller 40 has at its periphery advantageously a circumferential recess 70 in which the Anwerfseil 34 is guided. Also the second guide roller 41 and the third guide roller 42 are advantageously designed accordingly.

The FIGS. 29 to 36 show an embodiment of a back-blown blower 101, the structure of which substantially corresponds to that of the blower 1. Like reference numerals designate corresponding components throughout the figures. Components not described for blower 101 are advantageously constructed as described for blower 1. The carrying handle 3 is arranged at the blower 101 to the fan spiral 10. As Fig. 29 shows, the blower 101 has a motor housing 7, on which a starter 108 is arranged. The starter device 108 has an arm 39. In the parking position 50 below the motor housing 7, the fuel tank 19 of the blower 101 is arranged. The fuel tank 19 has an in Fig. 30 shown area 32 which projects laterally beyond the backpack 2 and is not covered at the top. In the area 32, a filler neck with a tank lid 122 is arranged. The fuel cap is located in the Fig. 30 shown view on the xz plane, ie in the direction of the bottom plate 5 ( Fig. 29 The arm 39 extends in a plan view of the blower 101 between the filler neck and the blower spiral 10. The docking device 108 is laterally, ie in the direction of the axis z, and in the height direction, ie in the direction of the axis y, over the tank cap 122 over, so that the gas cap 122 in the in Fig. 29 shown direction of the yz plane does not form the outer boundary of the blower 101. The fuel cap 122 is protected in the lying in the x-direction behind the arm 39 and the Anwerfgriff 35 area. Thereby, the fuel cap 122 is shielded from the arm 39 and the Anwerfgriff 35 against branches or the like., So that damage to the tank lid 122 are avoided. At the same time, the gas cap 122 is easily accessible from above. As Fig. 29 shows, the arm 39 extends approximately parallel to the top of the fuel tank 19 and at a distance from the top of the fuel tank 19. The arm 39 extends at a small distance from the fuel tank 19, so that the portion of the Anwerfseils between the second guide roller 41 and the third Guide roller 42 is guided at a small distance to the fuel tank 19.

The FIGS. 29 to 32 show the Anwerfgriff 55 in a first launch position 143, in which the Anwerfgriff 35 is in a first end position. When the picking device 108 is unactuated, the picking handle 35 is in the first picking position 143. In the first picking position 143, the picking handle 35 is in its free end in the parking position 50 (FIG. Fig. 31 ) inclined relative to the shelf 51 obliquely forward and downward. The direction forward designates a direction perpendicular to the back plate 4 away from the motor housing 7. The direction to the rear denotes a direction perpendicular to the back plate 4 to the motor housing 7 back. The downward direction denotes the direction perpendicular to the bottom plate 5 away from the motor housing 7, and the upward direction is the direction perpendicular to the bottom plate 5 toward the motor housing 5. Directions parallel to the plane of the back plate 4 and the plane of the bottom plate 5 are lateral directions. If the back support 2 is carried by an operator on the shoulders, the directions are aligned in the upright posture of the operator forward, backward, up, down and side of the operator.

The longitudinal center axis 64 of the Anwerfseils 34 in the cable outlet opening 36, which corresponds to the longitudinal center axis of the Anwerfgriffs 35 includes in the first Anwerfposition 143 with the shelf 51 an angle ε, which is less than 45 °. However, the longitudinal center axis 64 and the shelf 51 are not parallel to each other. The angle ε is advantageously 25 ° to 40 °, in particular approximately 30 °. As Fig. 31 also shows, the Anwerfgriff 35 is arranged laterally in the area of fan spiral 10 and backpack 2 and does not protrude in the direction of the operator on the backpack 2 before.

The Fig. 31 and 32 show the fixation of the arm 39 on the fan coil 10. Like Fig. 31 shows, the screw dome 63 of the arm 39 abuts against the fan spiral 10 and is fixed thereto. As Fig. 32 shows, the extension 80 of the arm 39 in a receptacle 81st the fan coil 10 is inserted. As a result, the arm 39 is held in a form-fitting manner with respect to the fan spiral 10 adjacent to the first deflection roller 40 in the y-direction and z-direction.

Fig. 33 schematically shows a second start position 144. In the second start position 144 of the Anwerfgriff 35 projects upwards, in particular vertically upwards. The longitudinal central axis 64 closes in the second starting position with the storage surface 51 (FIG. Fig. 31 ) an angle of advantageously 90 °. The longitudinal central axis is advantageously inclined in the second starting position to the vertical by an angle of less than 15 °, in particular of less than 10 °.

The cable guide has a in Fig. 32 shown rope outlet opening 136, on which a guide member 137 is arranged. The guide member 137 limits the cable outlet opening 136. The design and fixation of the guide member 137 corresponds to-except for the shape of the guide member 137 - the design of the guide member 37. The guide member 137 has the legs 73 and 74. Wie Fig. 33 combined with Fig. 34 shows, the cable outlet opening 136 on a first portion 132 on which the Anwerfgriff 35 in the first position of launch 143 abuts. The first launching position 143 corresponds to a first end position of the Anwerfgriffs 35. The cable exit opening 136 also has a second portion 133 to which the Anwerfgriff 35 rests in the second Anwerfposition 144. Between the sections 132 and 133 extends a third section 134, which in the exemplary embodiment comprises a flat area. However, it can also be provided that the third section 134 extends completely bent. Also in this embodiment, the first portion 132 and the second portion 133 of the cable outlet opening 136 at different distances from the axis 45 of the guide roller 40.

As Fig. 35 shows, the Anwerfgriff 35 has a pin 135 which projects into the cable outlet opening 136 and the Anwerfgriff 35 between the two legs 73 and 74 of the Wire rings 72 ( Fig. 32 ) holds. The deflection roller 40 is not above the cable outlet opening 136 via. In Fig. 35 also the housing-fixed section 57 can be seen. The Anwerfseil 34 is in the FIGS. 35 and 36 illustrated shortened and not led to the Anwerfgriff 35. The longitudinal center axis 64 of the Anwerfseils 34 in the cable outlet opening 136 and at the bottom of the Anwerfgriffs 35 is in Fig. 35 drawn with dotted line. As Fig. 35 Also shows, the guide roller 40 has a peripheral portion 184. The peripheral portion 184 is the peripheral portion at which the cable outlet opening 136 extends. In the peripheral portion 184, the deflection roller has the radius r, which is greater than the diameter d of the Anwerfseils 34. The radius r is advantageously at least twice the diameter d. The radius r is preferably at least 8 mm, in particular at least 13 mm.

As Fig. 36 shows, the sections 132 and 133 form an angle δ which is less than 90 °. Advantageously, the angle δ is less than 70 °, in particular about 60 °. The angle δ is between radial to the axis 45, each extending to a circumferential end of the cable outlet opening 36, measured. The first section 132 is inclined to the vertical, that is inclined to the axis y. With the storage surface 51, the first section 132 closes in the parking position 50 an angle η, which is more than 45 °. The second section 133 extends in the exemplary embodiment parallel to the shelf 51.

As the figures show, the starter housing 20 is formed completely separate from the motor housing 7. Characterized in that the Anwerfvorrichtungen 8 and 108 are formed as a module whose components are all directly or indirectly connected to the starter housing 20, the Anwerfvorrichtung 8, 108 can be easily mounted as an assembly on an existing motor housing 7. A retrofitting of the starting device 8, 108 in existing implements is made possible. If damaged, the starter device 8, 108 can be easily replaced as an entire module.

The FIGS. 37 to 39 show an embodiment of a cable outlet opening 236 of a cable guide for a back-carried blower 1, 101. The cable guide is formed according to the cable guides 38 of the preceding embodiments. The cable guide has a starter housing 120, of which in Fig. 37 only the area adjacent the launching handle 35 is shown. Fig. 37 shows the arrangement in Abstellposition 50 in a first Anwerfposition 243 of the Anwerfgriffs 35. In the first launch position 243 of the Anwerfgriff 35 in the exemplary embodiment in Abstellposition 50 is approximately horizontally aligned. At the starter housing 120, a cable outlet opening 236 is formed which is bounded by a guide element 237. In unactuated Anwerfvorrichtung the Anwerfgriff 34 is in the in Fig. 37 shown first Anwerfposition 234 on the guide member 237.

As Fig. 37 shows, the cable outlet opening 236 is guided along a peripheral portion 284 of a deflection portion 240 of the cable guide. The deflection portion 240 forms a deflection element for the Anwerfseil 34. The deflection portion 240 is formed convexly curved and extends in a radius r about an axis 45. In the exemplary embodiment, the radius r is constant. However, it can also be provided that the radius r is not constant over the length of the deflection section 240. As Fig. 37 shows, the deflection portion 240 projects into the cable outlet opening 236. The peripheral portion 284 extends over a wrap angle ω, which is at least 90 °. The angle of wrap co is the angle by which the starter cable 34 can make maximum contact with the deflection section 240. In this case, the region whose radius r corresponds at least to the diameter d of the starting rope 34 is considered as the deflection section 240. Areas of lesser radius do not count toward the deflection section 240. The deflection section 240 has a first tangent 285 and a second tangent 286. The first tangent 285 is arranged at the beginning of the deflection section 240, that is to say in the area where the deployment cable 34 first rests, when the Anwerfgriff 35 is moved from the first starter position 243 in a second, not shown, starting position.

The second tangent 286 is a tangent to the deflection section 240 at the end of the deflection section 240. The second tangent 286 corresponds approximately to the alignment of the Anwerfseils 34 on the underside 65 of the Anwerfgriffs 35 in the position in which the Anwerfseil 34 over the entire deflection 240 on Deflecting section 240 rests and the deflection section 240 wraps over the wrap angle ω. The wrap angle ω is measured between a perpendicular to the first tangent 285 at the beginning of the turnaround portion 240 and a perpendicular to the second tangent 286 at the end of the turnaround portion 240.

The tangents 285 and 286 enclose an angle σ at the side facing away from the starting handle 35 in the first starting position 243 which is less than 90 °, in particular less than 80 °, advantageously less than 70 °, preferably less than 60 °. The angle σ is measured at the side facing away from the Anwerfgriff 35 between the tangents 285 and 286. The angle σ is measured in the area between the tangents 285 and 286, in which also the deflection section 240 is arranged. The angle σ and the wrap angle ω together make up 180 °.

As Fig. 38 schematically shows the guide member 237 at the bottom 50 in parking position 50 bottom straight. At the uppermost in Abstellposition 50 top 251, the guide member 237 is curved trumpet-shaped outward. On the vertically extending transverse sides 253 and 254, the guide element 237 also extends straight, as Fig. 38 shows. The guide element 237 is formed in one piece with the starter housing 120 in the exemplary embodiment. However, a design of a separate part or an insert that limits the cable outlet opening 236 at least partially, but may be advantageous. It can also be provided that the guide element 237 also extends bent on the underside lying in the parking position 50 bottom 252 to the outside. A bending outwards on the transverse sides 253 and 254 may also be advantageous. In a particularly preferred embodiment, the guide element is rotationally symmetrical and widens over its entire circumference trumpet-shaped. As a result, it is also possible to start an internal combustion engine by pulling on the starter cable 34 in the lateral direction, ie in the z direction.

Fig. 39 shows an embodiment of a cable guide with a cable outlet opening 336. At the cable outlet opening 336, a guide member 337 is arranged. The Anwerfgriff 35 is disposed in a first Anwerfposition 343, in which the Anwerfgriff 35 is inclined downwards. The longitudinal center axis 64 of the Anwerfseils 34 on the underside 65 of the Anwerfgriffs 35 includes the shelf 51 in Abstellposition 50 the angle ε. The angle ε can be like this Fig. 31 be sized described. The guide element 337 has a deflection section 340 which approximately corresponds to the deflection section 240. The deflection section 340 protrudes into the cable outlet opening 336. The deflection section 340 has a peripheral portion 384, which extends over a wrap angle ω, which corresponds to the in Fig. 37 shown Umwingungswinkel ω and which is more than 90 °. The tangents 385 and 386, which correspond to the tangents 285 and 296, include on the side opposite the launching handle 35 in the first launching position 343 an angle σ which is less than 90 °, in particular less than 80 °, advantageously less than 70 °, preferably less than 60 °.

The peripheral portion 384 is the peripheral portion of the deflecting portion 340, along which the cable outlet opening 336 is guided. The peripheral portion 384 is thus the peripheral portion on which the Anwerfseil 34 can create. The Anwerfseil 34 can create over the wrap angle ω at the peripheral portion 284. The radius r is in Fig. 39 not shown, but how to Fig. 37 described dimensions. The cable outlet opening 336 has an underside 352, which corresponds to the bottom 252 of the cable outlet opening 236 in their design. However, the underside 352 of the cable exit opening 336 is opposite to in FIG Fig. 37 shown offset design of Anwerfgriff 35 away. This results in a tendency of the Anwerfgriffs 35th downward. Advantageously, the in Fig. 39 not shown transverse sides of the cable outlet opening 336 inclined to the vertical and connect the bottom 352 in a straight line with a top 351. The design of in Fig. 39 shown cable guide is advantageous to the position of the bottom 352 of the cable outlet opening 336 according to the design of in Fig. 37 shown rope guide.

Fig. 40 shows the Anwerfgriff 35 in a second starting position 344. In the second starting position 344 of the Anwerfgriff 35 is slightly inclined upwards. In the second starting position 244, the longitudinal center axis 64 of the starter cable 34 at the bottom 65 of the Anwerfgriffs 35 with a vertical 230 at an angle φ, which is less than 15 °, in particular less than 10 °. This allows the starter handle 35 to be pulled up by the operator. The Anwerfgriff 35 rests with its underside 65 at the top in Abstellposition 50 side of the guide member 337 at.

Fig. 41 shows the starter handle 35 during the launching process. As Fig. 41 shows, the Anwerfgriff 35 can be pulled upwards and obliquely to the rear, so that the Anwerfseil 34 over a majority or the total wrap angle ω rests against the guide member 337. This allows the operator to retrieve a back-worn implement with a launching device Fig. 41 is equipped, even by pulling the Anwerfseil 34 in Abstellposition 50 upwards and from the back plate 4 (FIG. Fig. 1 ) throw away. This orientation of the Anwerfgriffs 35 is in Fig. 41 drawn with dashed line. Because the starter cable 34 is pulled along the guide element 337 in the radius r, damage to the starter cable 34 is avoided.

In order to reduce the friction and / or the wear on the guide element 237, 337, the guide element 237, 337 may be formed at least partially of a material other than the starter housing 120, in particular of metal. Preferably, the deflection section 240, 340 is at least partially formed by metal, in particular by a metallic insert.

The peripheral portion 284, 384, along which the cable exit opening 236, 336 extends, is measured between tangents 285, 286, and 385, 386, respectively, to the launch cable 34 in the first launch position 243, 343 and the second launch position 344. The peripheral portion 284, 384 is thus the portion to which the Anwerfseil 34 when pulling the Anwerfgriff 35 can create maximum. In all embodiments, the minimum radius r of the peripheral portion 84, 184, 284, 384 is greater than the diameter d of the Anwerfseils 34, in particular greater than twice the diameter d of Anwerfseils 34. The deflection sections 240, 340 as the guide roller 40 has a groove have on the circumference for lateral guidance of Anwerfseils 34. It can be provided that the deflecting sections 240, 340 protrude into the cable outlet openings 236, 336 as shown. However, it may also be advantageous that the deflection sections 240, 340 are arranged outside the cable outlet openings 236, 336 and, in particular, connect to the cable outlet openings 236, 336. Also, a small distance between the cable outlet opening 236, 336 and the deflection 240, 340 may be advantageous. The distance corresponds advantageously at most 4 times the minimum radius, in particular at most twice the minimum radius of the deflecting element.

It may be advantageous that the Anwerfgriff 35 in the first Anwerfposition 43, 143, 243, 343 at least partially in the cable outlet opening 36, 136, 236, 336 is arranged. It may be provided that the Anwerfgriff 35 is completely disposed in the cable outlet opening 36, 136, 236, 336 except for its thickened head. An arrangement of the Anwerfgriffs 35 in a cable outlet opening is particularly considered to be advantageous for a cable outlet, which expands on all sides, which thus has a trumpet-like shape.

All embodiments can be combined. In particular, angles other than the specified angular ranges are possible. The arrangement of the pulleys 41 and 42 is not limited to the embodiments, but There are also other positions and orientations of the pulleys 41 and 42 possible. In particular, a different orientation of the axes 46 and 47 may be advantageous. Another position, orientation or orientation of the axis 45 of the deflection roller 40 may also be advantageous.

Claims (15)

A starting device for an internal combustion engine, wherein the starting device (8, 108) comprises a starter cable (34) on which a starter handle (35) is fixed,
the starting device (8, 108) comprising a cable guide (38) for the starter cable (34) which guides the starter cable (34) from a pulley (23) of the starting device (8, 108) to a cable outlet opening (36, 136), wherein at the cable outlet opening (36, 136) a guide element (37, 137) is arranged, which holds the Anwerfseil (34) in the cable outlet opening (36, 136),
characterized in that the cable guide (38) comprises at least one deflection roller (40, 41, 42) that the cable outlet opening (36, 136) along a peripheral portion (84, 184) of the guide roller (40) of the cable guide (38) is arranged and the cable outlet opening (36, 136) extends along the peripheral section (84, 184) over a circumferential angle (α) of the deflection roller (40) of at least 60 °. Starter device according to claim 1,
characterized in that the Anwerfgriff (35) in unactuated Anwerfvorrichtung (8, 108) on the guide element (37, 137) rests. Starter device according to claim 1 or 2,
characterized in that the guide element (37, 137) is at least partially formed by a wire ring (72), wherein the wire ring (72) in particular in a housing of the Anwerfvorrichtung (8, 108) is fixed. Starter device according to one of claims 1 to 3,
characterized in that a parallel to the axis (45) of the deflection roller (40) measured distance (a) between the guide element (37, 137) and the deflection roller (40) is smaller than the diameter (d) of the Anwerfseils (34). Starter device according to one of claims 1 to 4,
characterized in that the deflection roller (40) is rotatably mounted about its axis (45). Starter device according to one of claims 1 to 5,
characterized in that the cable guide (38) comprises a second deflection roller (41), over which the Anwerfseil (34) is guided, wherein the second deflection roller (41) on a cable section between the pulley (23) and the first guide roller (40) is applied. Starter device according to claim 6,
characterized in that the cable guide (38) comprises a third deflection roller (42) which rests on a cable section between the cable pulley (23) and the second deflection roller (41) on the Anwerfseil (34). Starter device according to one of claims 1 to 7,
in that the starter device (8, 108) is designed as a module, wherein the starter device (8, 108) has, in particular, a starter housing (20) on which all components of the starter device (8, 108) are held. Starter device according to one of claims 1 to 8,
characterized in that the Anwerfgriff (35) has a first Anwerfposition (43, 143), in which the Anwerfgriff (35) in a first end position on the cable outlet opening (36, 136) is arranged, that the Anwerfgriff (35) has a second Anwerfposition (44, 144) has, in which the Anwerfgriff (35) in a second end position on the cable outlet opening (36, 136) is arranged, and that the Anwerfgriff (35) with unactuated Anwerfvorrichtung (8, 108) due to the Anwerfseil (34) acting forces in the first starting position (43, 143) is arranged. Starter device according to claim 9,
characterized in that the Anwerfgriff (35) has a cable outlet opening (36, 136) facing bottom (65) that the Anwerfgriff (35) has a median plane (68), the longitudinal central axis (64) of the Anwerfseils (34) on the Underside (65) and which is parallel to the axis (45) of the first guide roller (40), and that the Anwerfgriff (35) in the second starting position (44, 144) exclusively on the axis (45) facing side of the median plane ( 68) bears against the guide element (37, 137). A starting device for an internal combustion engine, wherein the starting device (8, 108) comprises a starter cable (34) on which a starter handle (35) is fixed,
the starting device (8, 108) comprising a cable guide (38) for the lifting cable (34) guiding the lifting cable (34) from a pulley (23) of the starting device (8, 108) to a cable outlet (236, 336), wherein at the cable outlet opening (236, 336) a guide element (237, 337) is arranged, which holds the Anwerfseil (34) in the cable outlet opening (236, 336),
characterized in that the cable guide (38) comprises at least one deflecting element, which is arranged on the cable outlet opening (236, 336), that the deflecting element has two tangents (285, 286, 385, 386), which at an angle (σ) cut by less than 90 ° and that the deflecting element has a minimum radius (r) which is greater than a diameter (d) of the Anwerfseils (34). A back-worn implement having an internal combustion engine (9) and a launching device (8, 108) according to any one of claims 1 to 11,
wherein the internal combustion engine (9) is arranged on a backpack arrangement,
wherein the implement has a parking position (50) in which the implement is placed on a flat, horizontal shelf (51) such that the starter handle (35) has a first launch position (43, 143, 243, 343) in which the docking cable (34) in the cable outlet opening (36, 136, 236, 336) in the parking position (50) to the storage surface (51) by an angle (ε) of less than 45 ° inclined, and that the Anwerfgriff (35) has a second Anwerfposition ( 44, 144, 344) in which the Anwerfseil (34) in the cable outlet opening (36, 136, 236, 336) in the parking position (50) to the vertical (330) by an angle (φ) of less than 15 ° is inclined , Tool according to claim 12,
characterized in that the Anwerfgriff (35) with unactuated Anwerfvorrichtung (8, 108) in the first Anwerfposition (43, 143, 243, 343) is arranged. Tool according to claim 12 or 13,
characterized in that the starting device (8, 108) comprises a winding device which generates a force in the winding direction on the starter cable (34), and in that the guide element (37, 137, 237, 337) is designed such that the force of the winding device in the second starter position (44, 144, 344) exerts a force component on the starter handle (35) towards the first starter position (43, 143, 243, 344). Tool according to one of claims 12 to 14,
characterized in that the Anwerfvorrichtung (8, 108) with the cable guide (38) is held on a common starter housing (20), and the starter housing (20) is formed separately from a motor housing (7) of the working device in which the combustion engine (9) is arranged.

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