WO2020193590A1

WO2020193590A1 - Cultivation machine, in particular portable lawn trimmer or portable strimmer, for cultivating an area of ground

Info

Publication number: WO2020193590A1
Application number: PCT/EP2020/058251
Authority: WO
Inventors: Tim Davison
Original assignee: Robert Bosch Gmbh
Priority date: 2019-03-28
Filing date: 2020-03-25
Publication date: 2020-10-01
Also published as: DE102019204373A1; CN113645833B; CN113645833A

Abstract

The invention is based on a cultivation machine, in particular on a portable lawn trimmer or on a portable strimmer, for cultivating an area of ground, in particular a grass area, with at least one drive unit (12), which comprises at least one electric motor (14), with at least one housing unit and/or frame unit (16) on which the electric motor (14) is arranged, and with at least one chassis unit (18) which has at least two, in particular driveable or drive-less, wheels (20, 22) which are mounted rotatably about at least one chassis axis (24) of the chassis unit (18). It is proposed that the cultivation machine comprises at least one, in particular hemispherical or semi-ellipsoidal, ground contact element (26) which is arranged on an output element (30) of the drive unit (12), said output element being mounted rotatably about an output axis (28) of the drive unit (12) running transversely, in particular at least substantially perpendicularly, to the chassis axis (24), in particular on a rotor shaft of the electric motor (14).

Description

description

Processing machine, in particular mobile grass trimmers or mobile ones

Brushcutter, for processing a floor area

State of the art

There are already processing machines, in particular mobile grass trimmers or mobile brushcutters, known for processing a floor area, in particular a grass area, the processing machines having a drive unit that includes an electric motor, a housing and / or frame unit on which the electric motor is arranged, and a chassis unit which has at least two wheels which are rotatably mounted about at least one chassis axis of the chassis unit.

Disclosure of the invention

The invention is based on a processing machine, in particular a mobile grass trimmer or a mobile brushcutter, for processing a floor area, in particular a grass area, with at least one drive unit, which comprises at least one electric motor, with at least one housing and / or frame unit , on which the electric motor is arranged, and with at least one chassis unit which has at least two, in particular drivable or non-drivable, wheels which are rotatably mounted about at least one chassis axis of the chassis unit.

It is proposed that the processing machine comprises at least one, in particular special hemispherical or semi-ellipsoidal, ground contact element, which is rotatable about a transverse, in particular at least in the direction of essential perpendicular, to the chassis axis running output axis of the drive unit mounted output element of the drive unit, in particular a rotor shaft of the electric motor, is arranged. The ground contact element is preferably designed as a floor sliding element, which has a sliding surface, with means of which the floor sliding element slides on the floor surface during a movement of the processing machine. The sliding surface is preferably formed as a surface of the hemispherical or semi-ellipsoidal floor sliding element, in particular as a surface of the hemispherical or semi-ellipsoidal floor sliding element, which faces away from the housing and / or frame unit in a state of the floor sliding element arranged on the output element. Preferably, the sliding surface is arranged in a state of the bottom sliding element that is angeord on the output element on a side of the bottom sliding element facing away from the output element. The ground contact element is preferably designed differently from a wheel of the chassis unit that is pivotable about a vertical axis. The output axis preferably runs at least substantially parallel to a vertical axis or a vertical axis of the processing machine. The processing machine is preferably designed free of steerable wheels. The expression “essentially perpendicular” is intended here to define, in particular, an alignment of a direction relative to a reference direction, the direction and the reference direction, particularly viewed in a plane, enclosing an angle of 90 ° and the angle including a maximum deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. “Essentially parallel” should be understood here to mean in particular an alignment of a direction relative to a reference direction, in particular in a plane, the direction having a deviation from the reference direction, in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.

The output element on which the ground contact element is arranged is preferably designed as a rotor shaft of the electric motor. However, it is also conceivable that the output element is designed as another element that appears sensible to a person skilled in the art, such as, for example, as an output shaft, in particular as a gear shaft, as a gearwheel or the like. The electric motor is preferably provided for a direct drive of a soil cultivation tool, in particular a trimmer thread tool or a knife tool. “Provided” is to be understood in particular to be specifically designed and / or specially designed. The fact that an object is provided for a specific function should be understood in particular to mean that the object fulfills and / or executes this specific function in at least one application and / or operating state. Preferably, the soil cultivation tool is non-rotatably connected to the output element, in particular the rotor shaft of the electric motor. However, it is also conceivable that the drive unit comprises a gearbox via which the soil cultivation tool can be driven indirectly via the electric motor. The drive unit is preferably designed as a drive module. The drive module preferably comprises a drive module housing in which the electric motor, a transmission and / or an electronics module of the drive unit are / is arranged and / or stored. Cooling fins of the drive module are preferably arranged on an outside of the drive module housing, in particular formed in one piece with the drive module housing. The drive module preferably has at least one connection interface, in particular a connection interface arranged on the drive module housing, for connection to a control and / or regulating unit of the processing machine and / or an energy supply unit, in particular an energy supply unit comprising at least one battery pack. A “control and / or regulating unit” should be understood to mean, in particular, a unit with at least one control electronics. “Control electronics” should be understood to mean, in particular, a unit with a processor unit and with a memory unit and with an operating program stored in the memory unit. The operating program is preferably provided to control and / or regulate in particular at least the drive unit and / or the processing unit as a function of signals that are transmitted from the sensor unit to the control and / or regulating unit.

The drive module housing is preferably designed differently from the housing and / or frame unit of the processing machine. The drive module housing is preferably fastened to the housing and / or frame unit by means of a form-fitting and / or force-fitting connection. The housing and / or frame unit is preferably provided to at least partially close the drive unit, in particular the drive module, and / or the soil cultivation tool in a manner already known to a person skilled in the art surrounded, in particular to protect against unwanted touch by an operator. The housing and / or frame unit preferably comprises at least one protective element, in particular a protective shield, which is arranged on an upper side of the housing and / or frame unit facing away from the ground contact element. The protective element is preferably designed as a transparent plastic disk. The protective element is preferably provided to protect an operator and / or an electronics housing of the housing and / or frame unit from objects, in particular from objects accelerated by a rotation of the soil cultivation tool and thereby flying around. Preferably, at least one handle of the processing machine is net angeord on the housing and / or frame unit. The handle is preferably designed to be adjustable in a manner already known to a person skilled in the art. However, it is also conceivable that the processing machine is designed free of a handle and, for example, is designed as an autonomous processing machine that maneuvers independently over a floor surface to be processed. Further configurations of the processing machine that appear sensible to a person skilled in the art are also conceivable. The wheels of the chassis unit are preferably rotatably mounted on the housing and / or frame unit. However, it is also conceivable that the running gear unit has treadmills or running chains as an alternative to the wheels, with means of which the processing machine can be moved on the floor surface. The housing and / or frame unit preferably comprises at least the electronics housing in which the control and / or regulating unit is arranged and / or on which at least one receptacle interface of the processing machine for receptacle at least one battery pack is arranged. However, it is also conceivable that the processing machine alternatively or additionally has at least one power cable, by means of which the control and / or regulating unit and / or the electric motor can / can be supplied with electrical energy. The processing machine preferably comprises at least two receiving interfaces for receiving at least two battery packs. In a state arranged at the receiving interfaces, the battery packs are connected in a manner already known to a person skilled in the art via the control and / or regulating unit, in particular in an electrically conductive manner, to the drive unit, in particular the electric motor of the drive unit. Furthermore, the processing machine preferably comprises at least one flywheel unit, in particular a flywheel unit, which has at least one, in particular rotationally symmetrical, flywheel element, in particular a flywheel, which can be rotatably driven by means of the drive unit and is provided to compensate for rotational irregularities. The flywheel element is preferably arranged, in particular non-rotatably, on a drive shaft, in particular the rotor shaft, of the drive unit. However, it is also conceivable that the flywheel element is arranged, in particular non-rotatably, on a fan wheel of the drive unit and / or that the

Flywheel element in one piece with a functional element, in particular with a fan wheel, with the rotor shaft, with a drive pinion or the like. The drive unit is formed. Preferably, the flywheel element is arranged on the rotor shaft of the drive unit that protrudes from the drive module housing, in particular is arranged on it in a rotationally fixed manner. It is also conceivable that the machine tool has at least one vibration damping unit which has at least one damping element which is arranged on the flywheel element, in particular between the flywheel element and the rotor shaft. The damping element can be designed as an elastomer damper, a spring damper, a fluid damper or the like.

By means of the configuration according to the invention, energy-efficient machining of a floor surface can advantageously be implemented. Reliable processing of a floor surface can advantageously be implemented. A high level of operator comfort can advantageously be achieved. A comfortable support of the processing machine, especially when the processing machine is configured as a mobile grass trimmer or a mobile brushcutter, can be made possible. By means of the ground contact element, an at least essentially constant distance between the bottom surface and the housing and / or frame unit can advantageously be maintained during processing of a bottom surface. Preferably, an at least substantially constant cutting height of grass during a processing of a ground surface can advantageously be made possible by means of the design of the processing machine according to the invention. Furthermore, it is proposed that the processing machine comprises at least one decoupling unit, which is provided to mount the ground contact element in at least one operating state in a freely rotatable manner on the output element, in particular provided for a drive of the soil cultivation tool. The decoupling unit is preferably provided to mount the ground contact element in at least one operating state in a freely rotatable manner relative to the output element, in particular to the rotor shaft. It is conceivable that the decoupling unit is designed to be switchable, in particular to mount the ground contact element freely rotatable on the output element in at least one operating state and to connect it to the output element in a rotationally fixed manner in at least one further operating state. The decoupling unit preferably comprises at least one bearing element with or without a free wheel for a freely rotatable mounting of the ground contact element on the output element or for a rotationally fixed mounting on the output element. The bearing element can be designed as a plain bearing, as a roller bearing, as a fluid bearing, in particular as a magnetorheological fluid bearing, or as another bearing element that appears to be useful to a person skilled in the art. The decoupling unit, in particular at least the bearing element of the decoupling unit, is preferably arranged between the ground contact element and the output element, in particular the rotor shaft. The ground contact element is preferably arranged at least by means of the bearing element of the decoupling unit on the output element, in particular on the rotor shaft. By means of the configuration according to the invention, energy-efficient processing of a floor surface can advantageously be implemented, in particular since a low total mass can be achieved, which can be driven in rotation by the electric motor. Low wear on the ground contact element can advantageously be made possible. A long service life of the ground contact element can advantageously be made possible as a result of low wear. It can advantageously be achieved a gentle processing of a floor surface, in particular since a rotation of the Bodenkontaktele element can be achieved during a standstill of the processing machine with the rotating soil cultivation tool.

It is further proposed that the decoupling unit has at least one bearing element designed as a sliding bearing or as a roller bearing, by means of which the ground contact element can rotate freely in at least one operating state the output element is mounted. The bearing element can be designed as a sliding sleeve, such as a copper sleeve, a graphite sleeve or the like, a ball bearing, a needle bearing, a barrel bearing or another plain bearing or roller bearing that appears useful to a person skilled in the art. It is conceivable that the bearing element and / or the ground contact element, in particular in a contact area between the bearing element and the ground contact element and / or on an outer surface of the ground contact element, have a coating such as a graphite coating, a PTFE coating or the like / has in order to realize a low coefficient of friction. By means of the configuration according to the invention, a low level of friction between the ground contact element and the output element can advantageously be implemented, in particular in order to implement a structurally simple solution to free rotation of the ground contact element. An energy-efficient processing of a floor surface can advantageously be implemented, in particular since a low total mass can be achieved, which can be driven in rotation by the electric motor. It can advantageously be made possible a little wear on the ground contact element. A long service life of the floor contact element can advantageously be made possible as a result of low wear. A gentle processing of a floor surface can advantageously be achieved, in particular since the floor contact element can also rotate while the processing machine is at a standstill with the rotating floor processing tool.

In addition, it is proposed that the processing machine, in particular alternatively or in addition to the decoupling unit, comprises at least one speed variation unit, which is provided to operate the soil contact element in at least one operating state as a function of a rotation of the, in particular, intended to drive the soil cultivation tool, Drive output element with a different speed of the output element, in particular a lower speed, to drive the output shaft. The decoupling unit and the speed variation unit can at least partially be designed in one piece. The fact that “a unit and a further unit are at least partially formed in one piece” is to be understood in particular as meaning that the unit and the further unit have at least one jointly used component. It is conceivable that the speed variation unit as Gear unit, is designed as a coupling unit or as another unit that appears sensible to a person skilled in the art, which is provided to the floor contact element in at least one operating state depending on a rotation of the output element provided, in particular for a drive of the tillage tool, with one of a speed of the drive element from different, in particular lower, speed to drive the drive axis from. In the case of an embodiment of the speed variation unit as a gear unit, the ground contact element preferably comprises at least one toothing which interacts with at least one further toothing of the speed variation unit designed as a gear unit. In one embodiment of the speed variation unit, the speed variation unit is preferably designed as a gear unit as a reduction gear. By means of the design according to the invention, an energy-efficient processing of a floor surface can advantageously be realized, in particular since a mass of the Bodenkon contact element can be used as, in particular, an additional centrifugal mass in order to compensate for rotational irregularities.

Furthermore, it is proposed that the speed variation unit has at least one coupling element which is arranged between the ground contact element and the output element. Preferably, the coupling element is provided to arrange the ground contact element in at least one operating state so that it can rotate freely on the output element and to connect it to the output element in a rotationally fixed manner in at least one operating state. Preferably, the coupling element is designed in such a way that the ground contact element can be driven by means of the output element at least until a limit value of a speed of the ground contact element is exceeded and is then freely rotatable relative to the output element, the coupling element when the speed of the ground contact element falls below the limit value Bodenkon contact element again rotatably connects to the output element. By means of the design according to the invention, a decoupling of the ground contact element from a rotary movement of the output element can be implemented in a structurally simple manner. An energy-efficient processing of a floor surface can advantageously be implemented, in particular since, in a state of the floor contact element connected in a rotationally fixed manner to the output element, a mass of the floor contact telements as, in particular additional, flywheel can be used to compensate for Dre uniformities.

It is also proposed that the speed variation unit is designed as a viscous coupling, a centrifugal clutch or a torque converter. By means of the speed variation unit designed as a centrifugal clutch, it is conceivable that the ground contact element is driven by means of the Abtriebsele at least until the ground contact element exceeds / falls below a limit value of a speed of the ground contact element and is then freely rotatable. The speed variation unit designed as a viscous clutch, a centrifugal clutch or a torque converter is preferably arranged between the output element and the ground contact element, particularly in terms of drive technology. By means of the embodiment according to the invention, a decoupling of the ground contact element from a rotary movement of the output element can be implemented in a constructive manner. An energy-efficient processing of a floor surface can advantageously be realized, in particular since, in a state of the floor contact element connected to the output element in a rotationally fixed manner, a mass of the floor contact element as, in particular additional,

Inertia mass can be used to compensate for rotational irregularities.

It is also proposed that the speed variation unit be designed to be switchable. The speed variation unit is preferably designed to be switchable manually by an operator. The speed variation unit is preferably designed to be switchable or switchable, in particular in order to be able to switch between free rotatability of the ground contact element relative to the output element and at least partial transmission of a rotary movement of the output element to the ground contact element. By means of the design according to the invention, a high degree of flexibility can advantageously be achieved with regard to the possibility of using the ground contact element. A high level of operating convenience can advantageously be achieved, in particular since an operator can individually decide whether to use the ground contact element.

It is also proposed that the processing machine have at least one, in particular the aforementioned, decoupling unit and at least one tool interface arranged on the output element to a receptacle one, in particular the aforementioned, soil cultivation tool, in particular a trimmer line tool or a knife tool, wherein the output element is designed as a rotor shaft and the ground contact element by means of the decoupling unit in at least one operating state relative to the output element and / or relative to the one at the tool interface arranged tillage tool is freely rotatable. The soil processing tool preferably has at least one cutting blade or at least one trimmer cord. The tool interface is preferably connected to the output element in a rotationally fixed manner. Reliable processing of a floor surface can advantageously be implemented by means of the configuration according to the invention. An energy-efficient processing of a floor surface can advantageously be realized, in particular since it can reach a small total mass that can be driven in rotation by the electric motor. A gentle processing of a soil surface can advantageously be achieved, in particular since the soil contact element can also rotate while the processing machine is at a standstill when the soil working tool is rotating.

It is also proposed that the processing machine comprises at least one fixing element for a captive arrangement of the ground contact element on the drive element and at least one closure element which is provided to close an access opening delimited by the ground contact element, through which access to the fixing element is possible. Preferably, the fixing element is designed as a screw, which can preferably be screwed into the drive element from. The output element preferably has an internal thread which cooperates with an external thread of the fixing element. However, it is also conceivable that the fixing element has a different design, such as a design as a nut with an internal thread that interacts with an external thread of the output element, as a latching or clip element or as another of the fixing element that would appear useful to a person skilled in the art. The closure element can preferably be attached to the access opening in a form-fitting and / or force-fitting manner. However, it is also conceivable that the closure element is movably mounted on the ground contact element, in particular in the area of the access opening, in particular in a pivotable manner. The closure element is preferably designed as a closure cover. The Closure element preferably comprises elastically deformable securing segments, which are provided to rest against an edge region of the soil contact element bordering the access opening in a state of the closure element arranged on the ground contact element. By means of the configuration according to the invention, a closed sliding surface can advantageously be realized on the ground contact element. A gentle processing of a floor surface can advantageously be achieved, in particular since a closed sliding surface on the floor contact element can be realized by closing the access opening. Penetration of dirt into the access opening can advantageously be kept low.

It is also proposed that the processing machine comprises at least one height adjustment unit for setting a distance between the floor contact element and an underside of the housing and / or frame unit facing the floor contact element. The height adjustment unit is preferably provided as an alternative or in addition to setting a distance between the soil cultivation tool and an underside of the housing and / or frame unit facing the soil cultivation tool. For example, it is conceivable that the height adjustment unit is designed as a telescopic unit, by means of which a distance between the soil contact element and / or soil cultivation tool and the underside of the housing and / or frame unit facing the soil contact element and / or the soil cultivation tool can be set. It is also conceivable that the height adjustment unit is designed as a hydraulic unit, by means of which a distance between the soil contact element and / or the soil cultivation tool and the underside of the housing and / or frame unit facing the soil contact element and / or the soil cultivation tool can be set. By means of the configuration according to the invention, reliable processing of a floor surface can advantageously be realized. A high level of operator comfort can advantageously be achieved. A distance between the bottom surface and the housing and / or frame unit can advantageously be set in a structurally simple manner. A convenient setting of a cutting height of grass can advantageously be made possible by means of the configuration of the processing machine according to the invention. The processing machine according to the invention should not be limited to the application and embodiment described above. In particular, the processing machine according to the invention can have a number of individual elements, components and units that differs from a number of individual elements, components and units mentioned here in order to fulfill a mode of operation described here. In addition, in the case of the value ranges specified in this disclosure, values lying within the stated limits should also be deemed disclosed and can be used as desired.

drawing

Further advantages emerge from the following description of the drawings. An exemplary embodiment of the invention is shown in the drawing. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.

Show it:

Fig. 1 shows a processing machine according to the invention in a cal matic representation,

2 shows the processing machine according to the invention with a de-assembled electronics housing and a disassembled one

Protective element of a housing and / or frame unit of the machine tool according to the invention in a schematic representation,

Fig. 3 shows a drive unit of the processing machine according to the invention with a soil processing tool arranged thereon and a ground contact element of the processing machine according to the invention in a dismantled from the housing and / or frame unit to stand in a schematic representation and 4 shows a sectional view of the drive unit with the soil cultivation tool arranged thereon and the soil contact element arranged thereon in a schematic representation.

Description of the embodiment

Figure 1 shows a processing machine 10, which is designed as a mobile grass trimmer or as a mobile brushcutter. The processing machine 10 is designed as an electrically operated, in particular as a battery-operated processing machine 10. The processing machine 10 is provided for processing a floor area, in particular a grass area. The processing machine 10 has at least one drive unit 12, which comprises at least one electric motor 14, at least one housing and / or frame unit 16 on which the electric motor 14 is arranged, and at least one chassis unit 18, the at least two, in particular drivable or having non-driven wheels 20, 22 which are rotatably mounted about at least one landing gear 24 of the landing gear unit 18. The wheels 20, 22 of the chassis unit 18 are preferably rotatably mounted on the housing and / or frame unit 16. However, it is also conceivable that the chassis unit 18 has, as an alternative to the wheels 20, 22, treadmills or track chains, by means of which the processing machine 10 can be moved on the floor surface.

The drive unit 12, in particular the electric motor 14, is preferably provided for direct or indirect drive of a soil cultivation tool 34 of the cultivation machine 10. The drive unit 12 preferably comprises at least one output element 30 (cf. in particular FIG. 4) on which the soil cultivation tool 34 can be fixed (cf. FIGS. 2 to 4). The output element 30 is preferably designed as a rotor shaft of the electric motor 14. However, it is also conceivable that the output element 30 has a different configuration that appears sensible to a specialist, such as a configuration as a transmission output shaft or the like. The tillage tool 34 is preferably by means of the drive unit 12 around an at least substantially perpendicular to the chassis axis 24 running output shaft 28 of the drive unit 12 can be driven in rotation. The tillage implement 34 is preferably ausgebil det as a trimmer line tool or as a knife tool. The processing machine 10 preferably comprises at least one tool interface 42, by means of which the soil cultivation tool 34 can be fixed to the drive element 30, in particular the rotor shaft of the electric motor 14, by means of a form-fitting and / or force-fitting connection, in particular non-rotatably. The tool interface 42 can be formed in one piece with the output element 30 or can be configured separately from the output element 30 and fixed to the output element 30 in a rotationally fixed manner by means of a form-fitting and / or force-locking connection.

The drive unit 12 is preferably designed as a drive module. The drive module preferably comprises a drive module housing 52 in which the electric motor 14 and / or an electronics module (not shown here) of the drive unit 12 are / is arranged and / or supported (see FIGS. 2 and 3). Preferably, on an outside of the drive module housing 52, cooling ribs 54 of the drive module are arranged, in particular formed in one piece with the drive module housing 52. The drive module preferably has at least one connection interface 56, in particular a connection interface 56 arranged on the drive module housing 52, for connection to a control and / or regulating unit 58 of the processing machine 10 and / or an energy supply unit, in particular to at least one battery pack 70 , 72 comprehensive energy supply unit (see FIG. 3). The drive module housing 52 is preferably designed differently from the housing and / or frame unit 16 of the processing machine 10. The drive module housing 52 is preferably fastened to the housing and / or frame unit 16 by means of a form-fitting and / or force-fitting connection. The housing and / or frame unit 16 is preferably provided to at least partially surround the drive unit 12, in particular the drive module, and / or the soil cultivation tool 34 in a manner already known to a person skilled in the art, in particular from being accidentally touched by a Protect operator.

The housing and / or frame unit 16 preferably comprises at least one protective element 60, in particular a protective shield, which is attached to an upper side of the housing and / or frame structure facing away from the soil treatment tool. unit 16 is arranged. The protective element 60 is preferably designed as a transparent plastic disc. The protective element 60 is preferably provided to protect an operator and / or an electronics housing 62 of the housing and / or frame unit 16 from objects, in particular from objects accelerated by a rotation of the soil cultivation tool 34 and thus flying around. At least one handle 64 of the processing machine 10 is preferably arranged on the housing and / or frame unit 16. The handle 64 is preferably designed to be adjustable in a manner already known to a person skilled in the art. In particular, the handle 64 is provided for guiding the processing machine 10 by an operator. An operating unit (not shown here) of the processing machine 10 for operating the processing machine 10, in particular for regulating the speed of the drive unit 12, for starting up the processing machine 10 or the like, is preferably arranged on the handle 64. However, it is also conceivable that the processing machine 10 is designed free of a handle and is designed, for example, as an autonomous processing machine that maneuvers independently over a floor area to be processed, or is designed as a remote-controlled processing machine that can be remotely controlled by an operator. Further configurations of the processing machine 10 that appear reasonable to a person skilled in the art are also conceivable.

The housing and / or frame unit 16 preferably comprises at least the electronics housing 62, in which the control and / or regulating unit 58 is arranged and / or on the at least one receiving interface 66, 68 of the processing machine 10 for receiving at least one battery pack 70, 72 is arranged. However, it is also conceivable that the processing machine 10 alternatively or additionally has at least one power cable, by means of which the control and / or regulating unit 58 and / or the electric motor 14 can / can be supplied with electrical energy. The processing machine 10 preferably comprises at least two receiving interfaces 66, 68 for receiving at least two battery packs 70, 72. In a state arranged on the receiving interfaces 66, 68, the battery packs 70, 72 are transferred in a manner already known to a person skilled in the art the control and / or regulating unit 58, in particular re electrically conductive, connected to the drive unit 12, in particular to the electric motor 14 of the drive unit 12.

The processing machine 10 comprises at least one, in particular hemispherical or semi-ellipsoidal, ground contact element 26, which is mounted on the output element 30 of the drive unit 12, in particular the output element 30 of the drive unit 12, which is mounted rotatably around the transverse, in particular at least substantially perpendicular, output axis 28 of the drive unit 12, in particular the Rotor shaft of the electric motor 14 is arranged (see. Figures 2 to 4). The soil cultivation tool 34 is preferably arranged, viewed along the output axis 28, between the soil contact element 26 and the drive module housing 52, from which the output element 30 preferably extends. The floor contact element 26 is preferably designed as a floor sliding element which has a sliding surface 74 by means of which the floor sliding element slides on a floor surface during a loading movement of the processing machine 10. The Gleitflä surface 74 is preferably designed as a surface of the hemispherical or semi-ellipsoidal floor sliding element, in particular as a surface of the hemispherical or semi-ellipsoidal floor sliding element, which faces away from the housing and / or frame unit 16 when the floor sliding element is arranged on the output element 30. The sliding surface 74 is preferably arranged on a side of the floor sliding element facing away from the driven element 30 in a state of the floor sliding element arranged on the output element 30. The ground contact element 26 is preferably designed differently from a wheel of the chassis unit 18 that is pivotably mounted about a vertical axis. The output axis 28 preferably runs at least essentially parallel to a vertical axis or a vertical axis of the processing machine 10. The processing machine 10 is preferably free of wheels for steering the rotating at least essentially parallel to the vertical axis or to the vertical axis of the processing machine 10 Machining machine 10 formed.

The processing machine 10 preferably comprises at least one decoupling unit 32, which is provided for the purpose of freely rotating the soil contact element 26 in at least one operating state on the output element (30) provided, in particular for driving the soil cultivation tool 34 to store. The decoupling unit 32 preferably has at least one bearing element 36 designed as a sliding bearing or as a roller bearing, by means of which the ground contact element 26 is freely rotatably mounted on the output element 30 in at least one operating state (see FIG. 4). The bearing element 36 is preferably arranged between the output element 30 and the ground contact element 26. In an embodiment of the bearing element 36 as a roller bearing, in particular as a ball bearing, an inner ring of the bearing element 36, which is designed as a roller bearing, is non-rotatably connected to the output element 30 and an outer ring of the bearing element 36, which is designed as a roller bearing, is, in particular, non-rotatably, with the ground contact element 26 , in particular with a receptacle 76 of the soil contact element 26 connected. The processing machine 10 preferably comprises at least the decoupling unit 32 and at least the tool interface 42 arranged on the output element 30 for receiving the soil cultivation tool 34, in particular a trimmer thread tool or a knife tool, the output element 30 being designed as a rotor shaft of the electric motor 14 and the floor cone clock element 26 is freely rotatably mounted by means of decoupling unit 32 in at least one operating state relative to output element 30 and / or relative to soil cultivation tool 34 arranged at work tool interface 42. Preferably, the ground contact element 26 is supported by means of the decoupling unit 32 so as to be freely rotatable relative to the tool interface 42 in at least one operating state.

The processing machine 10 comprises at least one fixing element 44 for a captive arrangement of the soil contact element 26 on the output element 30 and at least one closure element 46 which is provided for closing an access opening 48 delimited by the soil contact element 26, through which access to the fixing element 44 is possible (cf. Figure 4). The fixing element 44 is preferably designed as a screw, which can preferably be screwed into the output element 30. The output element 30 preferably has an internal thread 78 which cooperates with an external thread 80 of the fixing element 44. However, it is also conceivable that the fixing element 44 has a different configuration, such as a configuration as a nut with an internal thread that interacts with an external thread of the output element 30, as a latching or clip element or as another, a person skilled in the art as a reasonable fixing element. The fixing element 44 is preferably provided to arrange at least the soil cultivation tool 34, the bearing element 36 and the soil contact element 26 on the output element 30 in a captive manner or to fasten them thereon.

The closure element 46 can preferably be attached to the access opening 48 in a form-fitting and / or force-fitting manner. However, it is also conceivable that the locking element 46 is movably mounted on the ground contact element 26, in particular in the region of the access opening 48, in particular pivotably. The closure element 46 is preferably designed as a closure cover or as a closure cap. The closure element 46 preferably comprises elastically deformable securing segments 82, which are provided to rest against an edge region of the floor contact element 26 that delimits the access opening 48 when the closure element 46 is arranged on the ground contact element 26. The securing segments 82 are preferably designed as radial extensions of the closure element 46. Preferably, an outer surface 84 of the closure element 46 terminates at least essentially flush with the sliding surface 74 of the soil contact element 26 when the closure element 46 is arranged on the floor contact element 26.

The processing machine 10 comprises, in particular in addition or as an alternative to the decoupling unit 32, preferably at least one speed variation unit 38, which is provided to drive the soil contact element 26 in at least one operating state as a function of a rotation of the output element provided, in particular to drive the soil cultivation tool 34 30 at a speed different from a speed of the output element 30, in particular a lower speed, about the output shaft 28 (see FIG. 4). The decoupling unit 32 and the speed variation unit 38 can be designed at least partially in one piece. It is conceivable that the speed variation unit 38 is designed as a gear unit, as a clutch unit or as another unit that appears sensible to a person skilled in the art, which is intended to operate the ground contact element 26 in at least one operating state depending on a rotation of the, in particular a drive of the soil cultivation tool 34 provided, output element 30 with a speed of rotation of the output element 30 different, in particular lower speed to drive the output shaft 28. In one embodiment of the speed variation unit 38 as a gear unit, the bottom contact element 26 preferably comprises at least one toothing that interacts with at least one further toothing of the speed variator 38 designed as a gear unit. The speed variation unit 38 is preferably designed as a reduction gear when the speed variation unit 38 is configured as a gear unit.

The speed variation unit 38 preferably has at least one clutch element 40 which is arranged between the ground contact element 26 and the output element 30. As an alternative or in addition to the bearing element 36, the coupling element 40 can be arranged on the output element 30, in particular between the output element 30 and the ground contact element 26. The speed variation unit 38 is preferably designed as a viscous coupling, a centrifugal clutch or a torque converter. However, it is also conceivable that the speed variation unit 38 has a different configuration that appears useful to a person skilled in the art. The speed variation unit 38 is preferably designed to be switchable. The speed variation unit 38 is preferably designed to be manually switchable by an operator. Preferably, the speed variation unit 38 can be switched on or off, in particular in order to be able to switch between the free rotation of the ground contact element 26 relative to the output element 30 and an at least partial transmission of a rotary movement of the output element 30 to the ground contact element 26.

Furthermore, the processing machine 10 preferably comprises at least one height adjustment unit 50 for setting a distance between the ground contact element 26 and an underside of the housing and / or frame unit 16 facing the ground contact element 26 (see FIG. 2). Preferably, the height adjustment unit 50 is provided as an alternative or in addition to setting a distance between the soil cultivation tool 34 and the underside of the housing and / or frame unit 16 facing the soil cultivation tool 34. For example, it is conceivable that the height adjustment unit 50 is designed as a telescopic unit, by means of which a distance between the soil contact element 26 and / or the soil cultivation tool 34 and the bottom of the housing and / or frame unit 16 facing the soil contact element 26 and / or the soil cultivation tool 34 is adjustable. For example, it is conceivable that the height adjustment unit 50 is designed in such a way that, for example, an output element 30 in the form of a telescopic and two-part wedge-groove shaft can be changed in length by means of the height adjustment unit 50 by a distance between the soil contact element 26 and / or the soil cultivation tool 34 and the soil contact element 26 and / or the underside of the housing and / or frame unit 16 facing the soil cultivation tool 34. It is also conceivable that the height adjustment unit 50 is designed as a hydraulic unit, by means of which a distance between the soil contact element 26 and / or the soil cultivation tool 34 and the underside of the housing and / or frame unit facing the soil contact element 26 and / or the soil cultivation tool 34 16 is adjustable.

Furthermore, the processing machine 10 preferably comprises at least one flywheel unit 86, in particular a flywheel unit, which has at least one, in particular rotationally symmetrical, flywheel element 88, in particular a flywheel, which can be rotatably driven by means of the drive unit 12 and is provided to compensate for rotational irregularities (see FIGS. 2 to 4). The flywheel element 88 is preferably, in particular non-rotatably, arranged on the output element 30, in particular the Ro gate shaft, of the drive unit 12. However, it is also conceivable that the flywheel element 88 is arranged, in particular non-rotatably, on a fan wheel of the drive unit 12 and / or that the flywheel mass element 88 is in one piece with a functional element, in particular with a fan wheel, with the rotor shaft, with a drive pinion or the like. , the drive unit 12 is formed. The flywheel element 88 is preferably arranged on the rotor shaft of the drive unit 12 protruding from the drive module housing 52, in particular arranged in a rotationally fixed manner thereon. It is also conceivable that the processing machine 10 has at least one vibration damping unit (not shown in detail here) which has at least one damping element that is arranged on the flywheel element 88, in particular between the flywheel element 88 and the rotor shaft. The damping element can be an elastomer damper, a spring damper, a fluid damper or the like be. Further configurations of the processing machine 10 that appear sensible to a person skilled in the art are also conceivable.

Claims

Expectations

1. Processing machine, in particular mobile grass trimmer or mobile brushcutter, for processing a floor area, in particular egg ner grass area, with at least one drive unit (12), which comprises at least one electric motor (14), with at least one housing and / or frame unit (16), on which the electric motor (14) is arranged, and with at least one chassis unit (18) which has at least two, in particular drivable or non-drivable, wheels (20, 22) which are centered around at least one chassis axis (24) of the chassis unit (18) are rotatably mounted, characterized by at least one, in particular hemispherical or semi-ellipsoidal, ground contact element (26), which is attached to a rotatable bar around an output shaft (28) of the drive unit (28) running transversely, in particular at least substantially perpendicular to the chassis axis (24). 12) mounted output element (30) of the drive unit (12), in particular a rotor shaft of the electric motor (14), is arranged.

2. Processing machine according to claim 1, characterized by at least one decoupling unit (32) which is provided to the ground contact element (26) in at least one operating state freely rotatable on the, in particular to a drive of a soil cultivation tool (34) provided, output element ( 30) to store.

3. Processing machine according to claim 2, characterized in that the decoupling unit (32) has at least one bearing element (36) designed as a plain bearing or as a rolling bearing, by means of which the bottom contact element (26) can be freely rotated on the output element (30) in at least one operating state ) is stored.

4. Processing machine according to one of the preceding claims, characterized by at least one speed variation unit (38) which is provided to the soil contact element (26) in at least one operating state as a function of a rotation of the, in particular to a drive of a soil cultivation tool (34) provided, From the drive element (30) to drive a speed of the output element (30) different, in particular lower, speed around the output shaft (28).

5. Processing machine according to claim 4, characterized in that the speed variation unit (38) has at least one coupling element (40) which is arranged between the ground contact element (26) and the output element (30).

6. Processing machine according to claim 4 or 5, characterized in that the speed variation unit (38) is designed as a viscous clutch, as a centrifugal clutch or as a torque converter.

7. Processing machine according to one of claims 4 to 6, characterized in that the speed variation unit (38) is switchable ausgebil det.

8. Processing machine according to one of the preceding claims, characterized by at least one decoupling unit (32) and at least one tool interface (42) arranged on the output element (30) for receiving a soil cultivation tool (34), in particular a trimmer line tool or a knife tool, where the output element (30) is designed as a rotor shaft and the soil contact element (26) by means of the decoupling unit (32) in at least one operating state relative to the output element (30) and / or relative to the soil cultivation tool (34) arranged at the tool interface (42) ) is freely rotatable.

9. Processing machine according to one of the preceding claims, characterized by at least one fixing element (44) for a losi cheren arrangement of the ground contact element (26) on the output element (30) and at least one closure element (46) which is used to close a through the Ground contact element (26) limited access opening (48) is provided through which access to the fixing element (44) is possible.

10. Processing machine according to one of the preceding claims, characterized by at least one height adjustment unit (50) for setting a distance between the ground contact element (26) and an underside of the housing and / or frame unit (16) facing the ground contact element (26).