CN113645833B - Machine for working grass ground - Google Patents
Machine for working grass ground Download PDFInfo
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- CN113645833B CN113645833B CN202080025588.XA CN202080025588A CN113645833B CN 113645833 B CN113645833 B CN 113645833B CN 202080025588 A CN202080025588 A CN 202080025588A CN 113645833 B CN113645833 B CN 113645833B
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- 238000013016 damping Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/416—Flexible line cutters
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Working Implements (AREA)
- Harvester Elements (AREA)
Abstract
The invention relates to a working machine for a grass surface, comprising at least one drive unit (12), at least one housing and/or frame unit (16), and at least one chassis unit (18), wherein the drive unit comprises at least one electric motor (14), wherein the electric motor (14) is arranged on the housing and/or frame unit, wherein the chassis unit comprises at least two wheels (20, 22) which are rotatably mounted about at least one chassis axis (24) of the chassis unit (18). It is proposed that the working machine comprises at least one ground contact element (26) which is arranged on an output element (30) of the drive unit (12) which is rotatably mounted about an output axis (28) of the drive unit (12) which extends transversely to the chassis axis (24).
Description
Technical Field
The present application relates to a machine for machining floors, in particular grass floors.
Background
A working machine for working floors, in particular grass cutting machines (rasender) or mobile power sickles (Motorsense) for running, is known, wherein the working machine comprises a drive unit, a housing and/or a frame unit and a chassis unit, wherein the drive unit comprises an electric motor which is arranged on the housing and/or the frame unit, wherein the chassis unit has at least two wheels which are supported in a manner rotatable about at least one chassis axis of the chassis unit.
Disclosure of Invention
The invention is based on a working machine for working floors, in particular grass surfaces, in particular running grass cutters or running power sickles, having at least one drive unit, having at least one housing and/or frame unit and having at least one electric motor which is arranged on the housing and/or frame unit, and having at least two, in particular drivable or non-drivable, wheels which are supported in a manner rotatable about at least one running gear axis of the running gear unit.
It is proposed that the processing machine comprises at least one, in particular hemispherical or semi-ellipsoidal, ground contact element which is arranged on an output element of the drive unit, in particular on a rotor shaft of the electric motor, which is rotatably mounted about an output axis of the drive unit which extends transversely, in particular at least substantially perpendicularly, to the chassis axis. The ground contact element is preferably configured as a ground sliding element having a sliding surface by means of which the ground sliding element slides on the ground during the movement of the working machine. The sliding surface is preferably embodied as a surface of a hemispherical or semi-ellipsoidal floor sliding element, in particular as a surface of a hemispherical or semi-ellipsoidal floor sliding element facing away from the housing and/or the frame unit when the floor sliding element is arranged on the output element. Preferably, in the state in which the ground sliding element is arranged on the output element, the sliding surface is arranged on a side of the ground sliding element facing away from the output element. The ground contact element is preferably configured differently from a wheel of the chassis unit that is mounted pivotably about a height axis. Preferably, the output axis extends at least substantially parallel to the vertical or height axis of the machine. The processing machine is preferably configured without steerable wheels. The expression "substantially perpendicular" is intended to define in particular an orientation of a direction relative to a reference direction, wherein the direction and the reference direction enclose an angle of 90 ° as seen in particular in a plane, and the angle has a maximum deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. By "substantially parallel" is understood in particular an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 ° relative to the reference direction.
The output element, which is arranged with the ground contact element, is preferably configured as a rotor shaft of the electric motor. However, it is also conceivable for the output element to be configured as a further element which is considered to be of interest to the person skilled in the art, for example an output shaft, in particular a drive shaft, a gear wheel, etc. Preferably, the motor is provided for directly driving a floor working tool, in particular a trimming line tool or a cutter. "arranged" is to be understood in particular as specifically designed and/or specifically equipped. "an object is provided or designed for a specific function" is understood in particular to mean: the object implements and/or performs the particular function in at least one application and/or operating state. Preferably, the floor tool is connected in a rotationally fixed manner to the output element, in particular to the rotor shaft of the electric motor. However, it is also conceivable that the drive unit comprises a transmission via which the ground working tool can be driven indirectly by the electric motor. The drive unit is preferably configured as a drive module. The drive module preferably comprises a drive module housing on which the electric motor, the transmission and/or the electronics module of the drive unit is arranged and/or supported. Preferably, cooling ribs of the drive module are arranged on the outer side of the drive module housing, the cooling ribs being in particular formed in one piece with the drive module housing. Preferably, the drive module has at least one connection interface, in particular a connection interface arranged on the drive module housing, for connection to a control and/or regulation unit and/or an energy supply unit of the processing machine, in particular an energy supply unit comprising at least one battery pack. A "control and/or regulation unit" is understood to mean in particular a unit having at least one control electronics. "control electronics" is understood to mean in particular a unit having a processor unit, a memory unit and an operating program stored in the memory unit. The operating program is preferably provided for controlling and/or regulating at least the drive unit and/or the processing unit, in particular as a function of signals transmitted by the sensor unit to the control and/or regulation unit.
The drive module housing is preferably configured differently from the housing and/or the frame unit of the processing machine. Preferably, the drive module housing is fastened to the housing and/or the frame unit by means of a form-locking and/or force-locking connection. The housing and/or the frame unit are preferably provided for at least partially enclosing the drive unit, in particular the drive module and/or the floor tool, in particular for preventing them from being accidentally touched by an operator, in a manner known to a person skilled in the art. Preferably, the housing and/or the frame unit comprises at least one protective element, in particular a shield, which is arranged on the upper side of the housing and/or the frame unit facing away from the ground contact element. The protective element is preferably constructed as a transparent plastic barrier. The protective element is preferably provided for protecting the operator and/or the housing and/or the electronics housing of the frame unit from objects, in particular from objects that are accelerated by the rotation of the floor tool and thus fly in four directions. Preferably, at least one handle of the processing machine is arranged on the housing and/or the frame unit. The handle is preferably configured to be adjustable in a manner known to those skilled in the art. However, it is also conceivable for the machine to be constructed without a handle and for example to be constructed as an autonomous machine which works independently on the ground to be machined. Other configurations of the processing machine that would be considered interesting by those skilled in the art are likewise conceivable. Preferably, the wheels of the chassis unit are rotatably supported on the housing and/or the frame unit. However, it is also conceivable for the chassis unit to have, instead of the wheels, a running belt or a running chain, by means of which the processing machine can be moved on the ground. Preferably, the housing and/or the frame unit comprises at least an electronics housing in which the control and/or regulation unit is arranged and/or on which at least one receiving interface of the processing machine for receiving at least one battery pack is arranged. However, it is also conceivable that the processing machine instead of or in addition to at least one power supply line, by means of which the control and/or regulation unit and/or the electric motor can be supplied with electrical energy. Preferably, the processing machine comprises at least two receiving interfaces for receiving at least two battery packs. The battery pack is connected, in particular electrically conductively connected, to the drive unit, in particular to the electric motor of the drive unit, via the control and/or regulation unit in a manner known to the person skilled in the art in the state of being arranged on the receiving interface.
The processing machine preferably further comprises at least one rotary mass unit, in particular a flywheel unit, which has at least one rotary mass element, in particular a flywheel, which is configured in particular rotationally symmetrically, can be driven in a rotatable manner by means of a drive unit and is provided for compensating rotational irregularities. Preferably, the rotary mass element is arranged in particular in a rotationally fixed manner on an output shaft of the drive unit, in particular on the rotor shaft. However, it is also conceivable for the rotary mass element to be arranged in particular in a rotationally fixed manner on the fan wheel of the drive unit and/or for the rotary mass element to be formed in one piece with the functional elements of the drive unit, in particular the fan wheel, the rotor shaft, the drive pinion, etc. Preferably, the rotary mass element is arranged on a rotor shaft of the drive unit, which shaft protrudes from the drive module housing, in particular is arranged in a rotationally fixed manner. It is furthermore conceivable for the processing machine to have at least one damping unit with at least one damping element which is arranged on the rotating mass element, in particular between the rotating mass element and the rotor shaft. The damping element can be configured as an elastomer damper, a spring damper, a fluid damper, or the like.
By means of the configuration according to the invention, advantageously energy-saving floor processing can be achieved. Advantageously, reliable ground working can be achieved. Advantageously, high operator convenience can be achieved. It is possible to achieve a convenient support of the working machine, in particular in the configuration of the working machine as a travelable grass cutter or a travelable motorized sickle. By means of the ground-contacting element, it is advantageously possible to maintain an at least substantially constant distance between the ground and the housing and/or the frame unit during machining of the ground. Preferably, with the configuration according to the invention of the working machine, an at least substantially constant cutting height of the grass can advantageously be achieved during working of the ground.
Furthermore, it is proposed that the working machine comprises at least one decoupling unit which is provided for the free-pivoting support of the ground contact element in at least one operating state on an output element, in particular provided for driving the ground working tool. Preferably, the decoupling unit is provided for supporting the ground contact element in a manner that enables free rotation relative to the output element, in particular the rotor shaft, in at least one operating state. It is conceivable that the decoupling unit is configured to be switchable, in particular in order to support the ground contact element on the output element in a freely rotatable manner in at least one operating state and to be connected in a rotationally fixed manner to the output element in at least one further operating state. Preferably, the decoupling unit comprises at least one bearing element with or without a freewheel for the freely rotatable support of the ground contact element on the output element or the rotationally fixed support of the ground contact element on the output element. The bearing element can be configured as a plain bearing, a rolling bearing, a fluid bearing, in particular as a magnetorheological fluid bearing, or as another bearing element which is considered interesting by the person skilled in the art. Preferably, the decoupling unit, in particular at least the bearing element of the decoupling unit, is arranged between the ground contact element and the output element, in particular the rotor shaft. Preferably, the ground contact element is arranged on the output element, in particular the rotor shaft, at least by means of a bearing element of the decoupling unit. By means of the configuration according to the invention, energy-efficient ground working can advantageously be achieved, in particular because a small total mass can be achieved which can be rotationally driven by the electric motor. It may advantageously enable low wear of the ground contacting elements. A long service life of the ground contacting element can advantageously be enabled on the basis of low wear. Gentle ground working can be advantageously achieved, in particular because the rotation of the ground engaging elements can be achieved with the rotation of the ground working tool during standstill of the working machine.
Furthermore, it is proposed that the decoupling unit has at least one bearing element in the form of a plain bearing or a roller bearing, by means of which the ground contact element is supported on the output element in a freely rotatable manner in at least one operating state. The bearing element can be configured as a sliding sleeve, for example as a copper sleeve, a graphite sleeve or the like, as a ball bearing, as a needle bearing, as a roller bearing or as another sliding bearing or rolling bearing which is considered to be of interest to the person skilled in the art. It is conceivable for the bearing element and/or the ground-contacting element to have a coating, such as a graphite coating, a PTFE coating, etc., in particular in the contact region between the bearing element and the ground-contacting element and/or on the outer surface of the ground-contacting element, in order to achieve a low coefficient of friction. By means of the configuration according to the invention, a low friction between the ground-contacting element and the output element can advantageously be achieved, in particular in order to achieve a structurally simple solution for the freely rotatable ground-contacting element. Advantageously, energy-efficient ground working can be achieved, in particular because a small total mass can be achieved which can be rotationally driven by the electric motor. Advantageously, low wear on the ground contacting elements can be achieved. Advantageously, a long service life of the ground contacting element can be achieved due to low wear. Advantageously, gentle machining of the ground can be achieved, in particular because a concomitant rotation of the ground contact element can be achieved in the case of a rotation of the ground working tool during the standstill of the machine.
It is furthermore proposed that the processing machine, in particular instead of or in addition to the decoupling unit, comprises at least one transmission unit which is provided for, in at least one operating state, driving the ground contact element by means of a rotational speed, in particular provided for driving the rotation of the output element of the ground processing tool, around the output axis, which is different, in particular smaller, than the rotational speed of the output element. The decoupling unit and the transmission unit can be constructed at least in part in one piece. "one unit and another unit are constructed at least in part in one piece" is understood to mean in particular: the one unit and the other unit have at least one member in common. It is conceivable that the transmission unit is configured as a transmission unit, a clutch unit or another unit which is considered to be expedient by the person skilled in the art and which is provided for driving the ground contact element in at least one operating state by means of, in particular, a rotation provided for driving the output element of the ground working tool at a rotational speed about the output axis which differs from, in particular is smaller than, the rotational speed of the output element. In the configuration of the transmission unit as a transmission unit, the ground contact element preferably comprises at least one toothing, which cooperates with at least one further toothing of the transmission unit configured as a transmission unit. In the configuration of the transmission unit as a transmission unit, the transmission unit is preferably configured as a reduction gear. By means of the configuration according to the invention, an energy-saving ground working can advantageously be achieved, in particular because the mass of the ground contact element can be used, in particular, as an additional rotating mass to compensate for rotational irregularities.
Furthermore, it is proposed that the transmission unit has at least one clutch element, which is arranged between the ground contact element and the output element. The clutch element is preferably provided for the ground contact element to be arranged on the output element in a freely rotatable manner in at least one operating state and to be connected in a rotationally fixed manner to the output element in at least one operating state. The clutch element is preferably designed such that the ground contact element can be driven by the output element at least until a limit value for the rotational speed of the ground contact element is exceeded and is then free to rotate relative to the output element, wherein the clutch element in turn connects the ground contact element to the output element in a rotationally fixed manner below the limit value for the rotational speed of the ground contact element. By means of the embodiment according to the invention, the decoupling of the rotational movement of the ground contact element from the output element can be realized in a structurally simple manner. Advantageously, energy-saving ground working can be achieved, in particular because the mass of the ground contact element can be used, in particular as an additional rotating mass, to compensate for rotational irregularities, in the rotationally fixed connection of the ground contact element to the output element.
Furthermore, it is proposed that the transmission unit is designed as a viscous clutch, a centrifugal clutch or a torque converter. With the aid of the transmission unit in the form of a centrifugal clutch, it is conceivable to drive the ground-contacting element with the aid of the output element at least until the ground-contacting element exceeds/falls below a limit value for the rotational speed of the ground-contacting element and is then free to rotate. Preferably, the transmission unit, which is designed as a viscous clutch, centrifugal clutch or torque converter, is arranged in particular in terms of drive technology between the output element and the ground contact element. By means of the embodiment according to the invention, the decoupling of the rotational movement of the ground contact element from the output element can be realized in a structurally simple manner. Advantageously, energy-saving ground working can be achieved, in particular because the mass of the ground contact element can be used, in particular as an additional rotating mass, in the state of a rotationally fixed connection of the ground contact element to the output element, in order to compensate for rotational irregularities.
Furthermore, it is proposed that the transmission unit is configured to be switchable. Preferably, the speed change unit is configured to be manually switchable by an operator. The transmission unit is preferably configured to be able to be switched on or off, in particular in order to be able to switch between the freely rotatable nature of the ground-contacting element relative to the output element and the transmission of the rotational movement of the output element to at least part of the ground-contacting element. By means of the configuration according to the invention, a high flexibility in terms of the possibilities of use of the ground-contacting elements can advantageously be achieved. Advantageously, a high operational convenience can be achieved, in particular because the operator can make a personalized decision regarding the use of the ground contacting elements.
Furthermore, it is proposed that the processing machine comprises at least one decoupling unit, in particular as described above, and at least one tool interface arranged on the output element for receiving in particular as described above a ground processing tool, in particular a trimming line tool or a knife, wherein the output element is designed as a rotor shaft and the ground contact element is supported by means of the decoupling unit in a manner that is freely rotatable relative to the output element and/or relative to the ground processing tool arranged on the tool interface in at least one operating state. The floor tool preferably has at least one cutting blade or at least one trimming line. The tool interface is preferably connected in a rotationally fixed manner to the output element. By means of the configuration according to the invention, a reliable ground working can advantageously be achieved. Advantageously, energy-efficient ground working can be achieved, in particular because a small total mass can be achieved which can be rotationally driven by the electric motor. Advantageously, gentle machining of the ground can be achieved, in particular because a concomitant rotation of the ground contact element can be achieved in the case of a rotation of the ground working tool during the standstill of the machine.
Furthermore, it is proposed that the processing machine comprises at least one fastening element for the loss-proof arrangement of the ground contact element on the output element and at least one closing element which is provided for closing an access opening delimited by the ground contact element, through which the fastening element can be accessed. The fastening element is preferably designed as a screw, which can preferably be screwed into the output element. The output element preferably has an internal thread which cooperates with an external thread of the fixing element. However, it is also conceivable for the fastening element to have other configurations, for example a nut configured with an internal thread cooperating with an external thread of the output element, a latching element or a clip element, or other fastening elements configured as would be considered expedient by a person skilled in the art. Preferably, the closing element can be fastened to the access opening in a form-locking and/or force-locking manner. However, it is also conceivable for the closing element to be mounted on the ground-contacting element in a movable, in particular pivotable, manner, in particular in the region of the access opening. The closing element is preferably designed as a closing cap. The closing element preferably comprises an elastically deformable fastening section which is provided for bearing against an edge region of the ground contact element which delimits the access opening in the state in which the closing element is arranged on the ground contact element. By means of the configuration according to the invention, a closed sliding surface on the ground-contacting element can advantageously be achieved. Advantageously, gentle working of the ground is possible, in particular because a closed sliding surface on the ground contact element can be achieved by closing the access opening. Advantageously, dirt intrusion into the access opening can be kept low.
Furthermore, it is proposed that the processing machine comprises at least one height adjustment unit for adjusting the distance between the ground contact element and the underside of the housing and/or frame unit facing the ground contact element. Preferably, the height adjustment unit is instead or additionally provided for adjusting the distance between the floor tool and the underside of the housing and/or frame unit facing the floor tool. For example, it is conceivable for the height adjustment unit to be configured as a telescopic unit, by means of which the distance between the ground contact element and/or the ground working tool and the underside of the housing and/or the frame unit facing the ground contact element and/or the ground working tool can be adjusted. It is also conceivable for the height adjustment unit to be configured as a hydraulic unit, by means of which the distance between the ground contact element and/or the ground working tool and the underside of the housing and/or the frame unit facing the ground contact element and/or the ground working tool can be adjusted. By means of the configuration according to the invention, a reliable ground working can advantageously be achieved. Advantageously, high operator convenience can be achieved. Advantageously, the distance between the floor and the housing and/or the frame unit can be adjusted in a structurally simple manner. Advantageously, by means of the configuration of the working machine according to the invention, a convenient adjustment of the cutting height of the grass can be achieved.
The processing machine according to the invention should not be limited to the applications and embodiments described above. In particular, the processing machine according to the invention can have a different number of individual elements, components and units than the number mentioned here in order to realize the functional manner mentioned here. Furthermore, in terms of the numerical ranges described in this disclosure, the numerical values within the mentioned ranges should also be considered as being disclosed and can be arbitrarily used.
Drawings
Other advantages result from the following description of the drawings. Embodiments of the invention are illustrated in the accompanying drawings. The drawings, description and claims contain a number of feature combinations. Those skilled in the art can also suitably consider these features individually and generalize them into other combinations of interest.
The drawings show:
figure 1 shows in a schematic view a processing machine according to the invention,
fig. 2 shows a schematic view of a processing machine according to the invention, wherein the electronics housing and the protective element of the housing and/or the frame unit of the processing machine according to the invention are removed,
fig. 3 shows schematically a drive unit of a machine according to the invention with a floor tool arranged thereon and a floor contact element of a machine according to the invention arranged thereon in a state removed from the housing and/or frame unit, and
fig. 4 shows a schematic representation of a section through a drive unit with a floor tool arranged thereon and a floor contact element arranged thereon.
Detailed Description
Fig. 1 shows a working machine 10 which is configured as a running grass cutter or as a running power sickle. The processing machine 10 is designed as an electrically operated processing machine 10, in particular as a battery operated processing machine. The machine 10 is configured for machining floors, particularly grass surfaces. 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, which has at least two, in particular drivable or non-drivable, wheels 20, 22, which are rotatably mounted about at least one chassis axis 24 of the chassis unit 18. Preferably, the wheels 20, 22 of the chassis unit 18 are rotatably supported on the housing and/or the frame unit 16. However, it is also conceivable for the running gear unit 18 to have, instead of the wheels 20, 22, a running belt or a running chain, by means of which the processing machine 10 can be moved on the ground.
The drive unit 12, in particular the motor 14, is preferably provided for directly or indirectly driving a floor tool 34 of the machine 10. The drive unit 12 preferably comprises at least one output element 30 (see in particular fig. 4) to which a floor tool 34 can be fastened (see fig. 2 to 4). The output element 30 is preferably configured as a rotor shaft of the electric motor 14. However, it is also conceivable for the output element 30 to have other configurations which are considered to be of interest to the person skilled in the art, for example as an output shaft of a transmission or the like. The ground working tool 34 is preferably drivable by means of the drive unit 12 in a rotatable manner about an output axis 28 of the drive unit 12 extending at least substantially perpendicularly to the chassis axis 24. The ground working tool 34 is preferably configured as a trimming line tool or a knife. The processing machine 10 preferably comprises at least one tool interface 42, by means of which the floor processing tool 34 can be fastened, in particular rotationally fixed, to the output element 30, in particular to the rotor shaft of the electric motor 14, by means of a form-locking and/or force-locking connection. The tool interface 42 can be formed in one piece with the output element 30 or separately from the output element 30 and can be fastened to the output element 30 in a rotationally fixed manner by means of a form-locking and/or force-locking connection.
The drive unit 12 is preferably configured as a drive module. The drive module preferably comprises a drive module housing 52 in which the electric motor 14 and/or the electronics module (not shown in detail here) of the drive unit 12 are arranged and/or supported (see fig. 2 and 3). Preferably, cooling ribs 54 of the drive module are arranged on the outer surface of the drive module housing 52, the cooling ribs 54 being in particular formed in one piece with the drive module housing 52. Preferably, the drive module 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 regulation unit 58 and/or an energy supply unit of the processing machine 10, in particular an energy supply unit comprising at least one battery pack 70, 72 (see fig. 3). The drive module housing 52 is preferably configured differently than the housing and/or frame unit 16 of the machine 10. Preferably, the drive module housing 52 is fastened to the housing and/or the frame unit 16 by means of a form-locking and/or force-locking connection. The housing and/or the frame unit 16 is preferably provided for at least partially enclosing the drive unit 12, in particular the drive module and/or the floor tool 34, in particular for preventing an operator from accidentally touching them, in a manner known to the person skilled in the art.
Preferably, the housing and/or frame unit 16 comprises at least one protective element 60, in particular a shield, which is arranged on the upper side of the housing and/or frame unit 16 facing away from the ground contact element 26. The protective element 60 is preferably constructed as a transparent plastic barrier. The protective element 60 is preferably provided for protecting the operator and/or the housing and/or the electronics housing 62 of the frame unit 16 from objects, in particular from objects that are accelerated by the rotation of the floor tool 34 and thus fly off. Preferably, at least one handle 64 of the machine 10 is disposed on the housing and/or frame unit 16. The handle 64 is preferably configured to be adjustable in a manner known to those skilled in the art. In particular, the handle 64 is provided for guiding the machine 10 by an operator. Preferably, an operating unit (not shown in detail here) of the processing machine 10 is arranged on the handle 64 for operating the processing machine 10, in particular for speed adjustment of the drive unit 12, for starting the processing machine 10, etc. However, it is also conceivable for the working machine 10 to be constructed without a handle and, for example, to be an autonomous working machine working independently on the ground to be worked or to be a remotely controllable working machine which can be remotely controlled by an operator. Other configurations of the machine 10 that would be considered significant by those skilled in the art are likewise contemplated.
Preferably, the housing and/or frame unit 16 comprises at least an electronics housing 62 in which the control and/or regulation unit 58 is arranged and/or on which 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 for the processing machine 10 to have, instead of or in addition, at least one power supply line, by means of which the control and/or regulating unit 58 and/or the motor 14 can be supplied with electrical energy. Preferably, the machine 10 includes at least two receiving interfaces 66, 68 for receiving at least two battery packs 70, 72. The battery packs 70, 72 are connected, in particular electrically conductively connected, to the drive unit 12, in particular to the electric motor 14 of the drive unit 12, via the control and/or regulation unit 58 in a manner known to the person skilled in the art in the state of being arranged on the receiving interfaces 66, 68.
The processing machine 10 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 which is mounted rotatably about an output axis 28 of the drive unit 12 which extends transversely, in particular at least substantially perpendicularly, to the chassis axis 24, in particular on the rotor shaft of the electric motor 14 (see fig. 2 to 4). The floor tool 34 is preferably disposed between the floor contacting element 26 and the drive module housing 52, as viewed along the output axis 28, from which the output element 30 preferably extends. The ground contact element 26 is preferably configured as a ground sliding element having a sliding surface 74, by means of which the ground sliding element slides on the ground during the movement of the processing machine 10. The sliding surface 74 is preferably embodied as a surface of a hemispherical or semi-ellipsoidal floor sliding element, in particular as a surface of a hemispherical or semi-ellipsoidal floor sliding element facing away from the housing and/or the frame unit 16 when the floor sliding element is arranged on the output element 30. Preferably, the sliding surface 74 is arranged on the side of the ground sliding element facing away from the output element 30 in a state in which the ground sliding element is arranged on the output element 30. The ground contact element 26 is preferably configured differently from a wheel of the chassis unit 18 that is mounted so as to be pivotable about a height axis. Preferably, the output axis 28 extends at least substantially parallel to a vertical or elevation axis of the machine 10. The machine 10 is preferably configured without wheels for steering the machine 10 supported in a manner rotatable about a vertical or elevation axis at least substantially parallel to the machine 10.
Preferably, the processing machine 10 comprises at least one decoupling unit 32, which is provided for the free-pivoting support of the ground contact element 26 in at least one operating state on an output element 30, in particular provided for driving a ground processing tool 34. Preferably, the decoupling unit 32 has at least one bearing element 36 embodied as a sliding bearing or rolling bearing, by means of which the ground contact element 26 is supported on the output element 30 in a freely rotatable manner in at least one operating state (see fig. 4). Preferably, the bearing element 36 is arranged between the output element 30 and the ground contacting element 26. In the embodiment of the bearing element 36 as a rolling bearing, in particular as a ball bearing, the inner ring of the bearing element 36 embodied as a rolling bearing is connected in a rotationally fixed manner to the output element 30, and the outer ring of the bearing element 36 embodied as a rolling bearing is connected in a rotationally fixed manner to the ground contact element 26, in particular to the receiving recess 76 of the ground contact element 26. The processing machine 10 preferably comprises at least a decoupling unit 32 and at least a tool interface 42 arranged on the output element 30 for receiving a floor processing tool 34, in particular a trimming line tool or a knife, wherein the output element 30 is designed as a rotor shaft of the electric motor 14 and the floor contact element 26 is supported by means of the decoupling unit 32 in a manner that is freely rotatable in at least one operating state relative to the output element 30 and/or relative to the floor processing tool 34 arranged on the tool interface 42. Preferably, the ground contact element 26 is supported by means of the decoupling unit 32 in a freely rotatable manner relative to the tool interface 42 in at least one operating state.
The processing machine 10 comprises at least one fastening element 44 for the loss-proof arrangement of the ground-contacting element 26 on the output element 30 and at least one closing element 46 which is provided for closing an access opening 48 delimited by the ground-contacting element 26, through which the fastening element 44 can be accessed (see fig. 4). The fastening element 44 is preferably designed as a screw, which can preferably be screwed into the output element 30. The output member 30 preferably has internal threads 78 that cooperate with external threads 80 of the fixation member 44. However, it is also contemplated that the fixation element 44 may have other configurations, such as a nut configured with internal threads that cooperate with external threads of the output member 30, a snap-lock element or a clip element, or other fixation elements configured as would be deemed appropriate by one of ordinary skill in the art. The fastening element 44 is preferably provided for arranging or fastening at least the ground working tool 34, the bearing element 36 and the ground contacting element 26 in a loss-proof manner on the output element 30.
Preferably, the closing element 46 can be fastened to the access opening 48 in a form-locking and/or force-locking manner. However, it is also conceivable for the closing element 46 to be mounted on the ground-contacting element 26 in a movable, in particular pivotable, manner, in particular in the region of the access opening 48. The closing element 46 is preferably designed as a closing cap or a closing flap. The closing element 46 preferably comprises an elastically deformable fastening section 82 which is provided for bearing against the edge region of the ground contact element 26 delimiting the access opening 48 in the state in which the closing element 46 is arranged on the ground contact element 26. The fastening section 82 is preferably configured as a radial extension of the closure element 46. Preferably, the outer surface 84 of the closure element 46 is at least substantially flush with the sliding surface 74 of the ground contacting element 26 in the state in which the closure element 46 is arranged on the ground contacting element 26.
In particular, in addition to or instead of the decoupling unit 32, the processing machine 10 preferably comprises at least one transmission unit 38 which is provided for, in at least one operating state, driving the ground contact element 26 (see fig. 4) by means of a rotation of the output element 30, in particular provided for driving the ground working tool 34, around the output axis 28 at a rotational speed which is different from, in particular smaller than, the rotational speed of the output element 30. The decoupling unit 32 and the transmission unit 38 can be constructed at least partially in one piece. It is conceivable that the transmission unit 38 is configured as a transmission unit, a clutch unit or as another unit which is considered to be expedient by the person skilled in the art, which unit is provided for driving the ground contacting element 26 in at least one operating state by means of, in particular, a rotation of the output element 30 which is provided for driving the ground working tool 34, at a rotational speed about the output axis 28 which is different from, in particular smaller than, the rotational speed of the output element 30. In the configuration of the transmission unit 38 as a transmission unit, the ground contact element 26 preferably comprises at least one toothing, which cooperates with at least one further toothing of the transmission unit 38 configured as a transmission unit. In the configuration of the transmission unit 38 as a transmission unit, the transmission unit 38 is preferably configured as a reduction gear.
The transmission unit 38 preferably has at least one clutch element 40, which is arranged between the ground contact element 26 and the output element 30. Instead of or in addition to the bearing element 36, a clutch element 40 can be arranged on the output element 30, in particular between the output element 30 and the ground contact element 26. The transmission unit 38 is preferably configured as a viscous clutch, a centrifugal clutch or a torque converter. However, it is also contemplated that the transmission unit 38 may have other configurations that would be considered significant by one skilled in the art. The transmission unit 38 is preferably configured to be switchable. Preferably, the shifting unit 38 is configured to be manually switchable by an operator. Preferably, the transmission unit 38 is configured to be either switchable or closable in order to be able to switch between the freely rotatable nature of the ground contacting element 26 relative to the output element 30 and the transmission of the rotational movement of the output element 30 to at least part of the ground contacting element 26.
Furthermore, the processing machine 10 preferably comprises at least one height adjustment unit 50 for adjusting the distance between the ground contact element 26 and the 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 instead or additionally provided for adjusting the distance between the floor tool 34 and the underside of the housing and/or frame unit 16 facing the floor tool 34. For example, it is conceivable for the height adjustment unit 50 to be configured as a telescopic unit, by means of which the distance between the ground contact element 26 and/or the ground working tool 34 and the underside of the housing and/or the frame unit 16 facing the ground contact element 26 and/or the ground working tool 34 can be adjusted. It is conceivable, for example, for the height adjustment unit 50 to be configured such that the length of the output element 30, which is, for example, of a telescopic and two-part key-groove shaft, can be varied by means of the height adjustment unit 50 in order to adjust the distance between the ground contact element 26 and/or the ground working tool 34 and the underside of the housing and/or frame unit 16 facing the ground contact element 26 and/or the ground working tool 34. It is also conceivable that the height adjustment unit 50 is configured as a hydraulic unit, by means of which the distance between the ground contact element 26 and/or the ground working tool 34 and the underside of the housing and/or the frame unit 16 facing the ground contact element 26 and/or the ground working tool 34 can be adjusted.
Furthermore, the processing machine 10 preferably comprises at least one rotary mass unit 86, in particular a flywheel unit, which has at least one rotary mass element 88, in particular a flywheel, which is configured in particular rotationally symmetrically, can be driven in a rotatable manner by means of the drive unit 12 and is provided for compensating rotational irregularities (see fig. 2 to 4). Preferably, the rotary mass element 88 is arranged in particular in a rotationally fixed manner on the output element 30 of the drive unit 12, in particular on the rotor shaft. However, it is also conceivable for the rotary mass element 88 to be arranged in particular in a rotationally fixed manner on the fan wheel of the drive unit 12 and/or for the rotary mass element 88 to be formed in one piece with the functional elements of the drive unit 12, in particular the fan wheel, the rotor shaft, the drive gear, etc. Preferably, the rotary mass element 88 is arranged on a rotor shaft of the drive unit 12, which protrudes from the drive module housing 52, in particular is arranged rotationally fixed thereon. It is furthermore conceivable for the processing machine 10 to have at least one damping unit (not shown in detail here) with at least one damping element which is arranged on the rotating mass element 88, in particular between the rotating mass element 88 and the rotor shaft. The damping element can be configured as an elastomer damper, a spring damper, a fluid damper, or the like. Other configurations of the machine 10 that would be considered significant by those skilled in the art are likewise contemplated.
Claims (11)
1. A machine for working grass ground, the machine having:
at least one drive unit (12) comprising at least one electric motor (14),
at least one housing and/or frame unit (16) on which the electric motor (14) is arranged,
at least one chassis unit (18) having at least two wheels (20, 22) which are rotatably mounted on the housing and/or frame unit about at least one chassis axis (24) of the chassis unit (18),
it is characterized in that the method comprises the steps of,
at least one ground contact element (26) is provided, which is arranged on an output element (30) of the drive unit (12) for driving a ground working tool (34), which is rotatably mounted about an output axis (28) of the drive unit (12), which axis extends transversely to the chassis axis (24), at least one transmission unit (38) is provided, which transmission unit (38) has at least one clutch element (40), which is arranged between the ground contact element (26) and the output element (30), and which clutch element is configured such that the ground contact element can be driven by means of the output element, at least until a limit value of the rotational speed of the ground contact element is exceeded and is then freely rotatable relative to the output element, wherein the clutch element in turn connects the ground contact element to the output element in a rotationally fixed manner below the limit value of the rotational speed of the ground contact element.
2. A machine according to claim 1, characterized in that at least one decoupling unit (32) is provided, which is provided for supporting the ground contact element (26) on the output element (30) in a freely rotatable manner in at least one operating state.
3. The machine according to claim 2, characterized in that the decoupling unit (32) has at least one bearing element (36) embodied as a plain bearing or a roller bearing, by means of which the ground contact element (26) is supported on the output element (30) in a freely rotatable manner in at least one operating state.
4. A machine as claimed in any one of claims 1 to 3, characterized in that the gear unit is arranged to drive the ground contacting element (26) in at least one operating state by means of rotation of the output element (30) at a rotational speed about the output axis (28) which differs from the rotational speed of the output element (30).
5. The processing machine according to claim 1 or 2, characterized in that the gear change unit (38) is configured as a viscous clutch, a centrifugal clutch or a torque converter.
6. The machine according to claim 1 or 2, characterized in that the gear change unit (38) is configured to be switchable.
7. A machine according to any one of claims 1 to 3, characterized in that at least one decoupling unit (32) and at least one tool interface (42) arranged on the output element (30) are provided, which tool interface is used for receiving a ground working tool (34), wherein the output element (30) is configured as a rotor shaft and the ground contact element (26) is supported by means of the decoupling unit (32) in a manner that is freely rotatable in at least one operating state relative to the output element (30) and/or relative to the ground working tool (34) arranged on the tool interface (42);
the ground working tool (34) is a trimming line tool or a cutter.
8. A machine as claimed in any one of claims 1 to 3, characterized in that at least one fastening element (44) for arranging the ground contact element (26) in a loss-preventing manner on the output element (30) and at least one closing element (46) provided for closing an access opening (48) delimited by the ground contact element (26) through which the fastening element (44) is accessible are provided.
9. A machine according to any one of claims 1-3, characterized in that at least one height adjustment unit (50) is provided for adjusting the distance between the ground contact element (26) and the underside of the housing and/or frame unit (16) facing the ground contact element (26).
10. A processing machine as claimed in any one of claims 1 to 3, characterized in that,
the processing machine is a movable grass cutter or a movable sickle; the wheel may be driven or non-driven;
the ground contacting elements are hemispherical or semi-ellipsoidal;
the output element is a rotor shaft of the electric motor (14);
the output axis is perpendicular to the chassis axis.
11. A machine according to claim 4, characterized in that the gear unit is arranged to drive the ground contacting element (26) in at least one operating state by means of rotation of the output element (30) at a rotation speed around the output axis (28) which is smaller than the rotation speed of the output element.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019204373.9 | 2019-03-28 | ||
| DE102019204373.9A DE102019204373A1 (en) | 2019-03-28 | 2019-03-28 | Processing machine, in particular a mobile grass trimmer or a mobile brush cutter, for processing a floor area |
| PCT/EP2020/058251 WO2020193590A1 (en) | 2019-03-28 | 2020-03-25 | Cultivation machine, in particular portable lawn trimmer or portable strimmer, for cultivating an area of ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113645833A CN113645833A (en) | 2021-11-12 |
| CN113645833B true CN113645833B (en) | 2024-03-08 |
Family
ID=70008521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080025588.XA Active CN113645833B (en) | 2019-03-28 | 2020-03-25 | Machine for working grass ground |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113645833B (en) |
| DE (1) | DE102019204373A1 (en) |
| WO (1) | WO2020193590A1 (en) |
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| US20180027731A1 (en) * | 2016-07-28 | 2018-02-01 | Mat Engine Technologies, Llc | Wheeled string trimmer mower |
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- 2019-03-28 DE DE102019204373.9A patent/DE102019204373A1/en active Pending
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- 2020-03-25 WO PCT/EP2020/058251 patent/WO2020193590A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113645833A (en) | 2021-11-12 |
| WO2020193590A1 (en) | 2020-10-01 |
| DE102019204373A1 (en) | 2020-10-01 |
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