DE202018006497U1 - mowing machine - Google Patents

Abstract

A lawnmower comprising: an implement body, a tool drive assembly comprising a cutting motor mounted on the implement body, a tool assembly mounted on the implement body and driven by the cutting motor, the tool assembly having a first cutting element and a second Comprising cutting elements which reciprocate relative to one another to mow grass, characterized in that the lawn mower comprises a locking mechanism by which the tool assembly is removably mounted on the implement body.

Description

FIELD OF THE INVENTION

The present invention relates to the field of gardening implements, in particular a lawn mower.

STATE OF THE ART

With the continuous advancement of computer technology and artificial intelligence technology, intelligent lawn mowers have slowly entered people's lives. A smart lawn mower can automatically mow and charge the user's lawn without user intervention. With such an automatic work system, after a one-time set-up, no more energy has to be expended on management in order to free users from boring, time-consuming and tedious household chores such as cleaning and lawn care.

The intelligent lawnmower can be used on the lawn within a range of A boundary line of limited area can move and mow the lawn, while the cutting mechanism of a conventional lawnmower is usually a centrally located rotating blade disc below the housing, which is arranged far away from the outside of the housing. When driving the lawnmower to the edge of the lawn, the lawnmower steers automatically so that degrees near the boundary line cannot be cut. However, the share of the cutting head in the area of the entire intelligent lawn mower is large, so that a more compact structure of the intelligent lawn mower is not possible.

To achieve a larger cutting width and a more compact structure, the intelligent lawnmower can be equipped with tools that move back and forth relative to one another. However, such tools are more frequently exposed to friction during the working process, which leads to a reduction in the cutting ability or damage to the knives, in which case they must be replaced by the user.

DISCLOSURE OF THE INVENTION

In order to overcome the disadvantages in the prior art, the object of the present invention is to provide a lawn mower in which the tools can be easily dismantled and replaced.

• Ein Rasenmäher umfasst einen Gerätekörper, eine Werkzeugantriebsanordnung, die einen Schneidmotor umfasst, der an dem Gerätekörper montiert ist, und eine Werkzeuganordnung, die an dem Gerätekörper montiert ist und von dem Schneidmotor angetrieben wird, wobei die Werkzeuganordnung ein erstes Schneidelement und ein zweites Schneidelement umfasst, die sich relativ zueinander hin und her bewegen, um Gras zu mähen, und wobei der Rasenmäher einen Verriegelungsmechanismus umfasst, über den die Werkzeuganordnung abnehmbar an dem Gerätekörper montiert ist.

According to the present invention, the object is achieved by the following configuration:

• A lawnmower includes an implement body, a tool drive assembly including a cutting motor mounted on the implement body, and a tool assembly mounted on the implement body and driven by the cutting motor, the tool assembly including a first cutting element and a second cutting element, reciprocating relative to each other to mow grass, and wherein the lawn mower includes a locking mechanism by which the tool assembly is removably mounted to the implement body.

In one exemplary embodiment it is provided that the locking mechanism comprises a base cover which is attached to the device body in such a way that at least part of the tool arrangement is clamped between the base cover and the device body.

In one embodiment it is provided that the locking mechanism comprises a locking element which is arranged on the device body and / or the base cover, wherein the locking element can be moved between a locking position and an unlocking position, wherein in the locking position the base cover is connected to the device body and in the unlocked position, the base cover is separated from the device body.

In one embodiment it is provided that the locking element comprises a buckle for connecting the base cover to the device body.

In one embodiment it is provided that the locking mechanism comprises a threaded connection arrangement via which the tool arrangement is attached to the device body.

In one embodiment it is provided that the tool drive arrangement comprises a rotary gear element which is connected to the cutting motor and is driven by the cutting motor, wherein the tool arrangement comprises a connecting gear element which is coupled to the rotary gear element in coordination therewith so that the cutting motor drives the tool arrangement .

In one embodiment it is provided that the rotary gear element comprises at least one projection and the connecting gear element comprises an indentation, which indentation receives the at least one projection.

In one embodiment, it is provided that the first cutting element comprises a first tool holder and a first knife which is driven by the tool drive arrangement and is detachably connected to the first tool holder via a connecting element.

In one embodiment it is provided that the connecting element comprises a fixed connecting element or a movable connecting element.

In one embodiment it is provided that the movable connecting element comprises a first gear element and a second gear element, the first gear element comprising a first end and a second end which are arranged opposite one another and are each movably connected to the first knife and the second cutting element, respectively wherein the second gear element is movably connected to the first gear element and is driven by the cutting motor to reciprocate the first knife relative to the second cutting element.

In one embodiment it is provided that the tool arrangement comprises a prestressing element which is arranged in at least one of the components of the first cutting element and second cutting element, so that at least a part of the first cutting element presses the second cutting element in place.

Compared to the prior art, the present invention is advantageously distinguished by the fact that the tool assembly and the device body can be quickly dismantled and assembled by means of the locking mechanism, which makes it easier for users to change the tool assembly.

• Ein Rasenmäher umfasst einen Hauptkörper, eine Schneidvorrichtung mit einem ersten Werkzeug und einem zweiten Werkzeug, die sich relativ zueinander hin und her bewegen können, um Schneidarbeiten durchzuführen, und ein Kraftübertragungssystem, das an dem Hauptkörper angeordnet und dazu eingerichtet ist, mindestens das erste Werkzeug in Hin- und Herbewegung relativ zu dem zweiten Werkzeug zu versetzen, wobei das Kraftübertragungssystem einen Antriebsmechanismus zum Bereitstellen von Antriebskraft, einen ersten Getriebemechanismus mit mindestens einem ersten Verbindungsarm, wobei der erste Verbindungsarm ein erstes Ende und ein zweites Ende, die einander gegenüberliegend angeordnet sind, umfasst, wobei das erste Ende drehbar mit dem ersten Werkzeug verbunden ist, wobei das zweite Ende drehbar direkt oder indirekt mit dem zweiten Werkzeug verbunden ist, und einen zweiten Getriebemechanismus umfasst, der dazu eingerichtet ist, durch den Antriebsmechanismus angetrieben zu werden, um den mindestens einen ersten Verbindungsarm in Bewegung zu versetzen und somit mindestens das erste Werkzeug anzutreiben, das drehbar direkt oder indirekt mit dem ersten Verbindungsarm verbunden ist, in Hin- und Herbewegung in Bezug auf das zweite Werkzeug zu versetzen, um Schneidarbeiten durchzuführen.

According to the present invention, the object is also achieved by another embodiment as follows:

• A lawnmower comprises a main body, a cutting device with a first tool and a second tool which can move back and forth relative to one another in order to perform cutting work, and a power transmission system which is arranged on the main body and is adapted to at least the first tool in To offset reciprocating movement relative to the second tool, wherein the power transmission system comprises a drive mechanism for providing driving force, a first gear mechanism with at least one first connecting arm, the first connecting arm having a first end and a second end which are arranged opposite one another , wherein the first end is rotatably connected to the first tool, wherein the second end is rotatably connected directly or indirectly to the second tool, and comprises a second gear mechanism which is adapted to be driven by the drive mechanism to the at least first of all to set a first connecting arm in motion and thus to drive at least the first tool, which is rotatably connected directly or indirectly to the first connecting arm, in reciprocating movement with respect to the second tool in order to carry out cutting work.

In the above power transmission system, at least one first connecting arm is rotatably connected to the first and second tools in the cutting device at the same time, with rolling friction being present at the contact point, thereby avoiding sliding friction generated by conventional guide components. The rolling friction is lower than the sliding friction, which reduces contact wear and transmission losses, reduces noise and extends the service life.

In one embodiment, the second tool is connected to the second end via a connecting plate and the two ends of the first connecting arm are rotatably connected to the first tool and the connecting plate via a first connecting element and a second connecting element. A first rotating sleeve is provided between the first connecting element on the one hand and the first end or the first tool on the other hand, while a second rotating sleeve is provided between the second connecting element on the one hand and the second end or the connecting plate on the other hand.

In one embodiment, the first and / or the second rotating sleeve are copper sleeves or bearings.

In one embodiment, the first connecting element and the second connecting element are correspondingly a first pin and a second pin and the two ends of the first connecting arm are hinged to the first tool or the connecting plate via the first pin and the second pin.

In one embodiment, the first link arm is provided in a number of two, and the first tool, the link plate, and the two first link arms form a connecting rod mechanism. The second gear mechanism is with an intermediate portion of the at least one first connecting arm connected.

In one embodiment, the two ends of the first connecting arm are rotatably connected to the first tool and the second tool via a third connecting element and a fourth connecting element. A third rotating sleeve is provided between the third connecting element on the one hand and the first end or the first tool on the other hand, while a fourth rotating sleeve is provided between the fourth connecting element on the one hand and the second end or the second tool on the other hand. The first tool, the second tool and the two first connecting arms form a connecting rod mechanism.

In one embodiment, the connecting rod mechanism is a parallel four-bar mechanism and the first tool can reciprocate linearly with respect to the second tool in the long axis direction of the second tool.

In one embodiment, the second gear mechanism comprises a crank, which is configured to be driven by the drive mechanism in order to transmit a driving force, and a rocker, which is configured to be driven by the crank, to the first connecting arm, the is connected to the rocker to set in motion.

In one embodiment, the crank is an eccentric wheel, and when the eccentric wheel is rotated one revolution, the first tool in the cutter is reciprocated for one cycle.

In one embodiment, the drive mechanism includes a motor and a reduction gear assembly configured to transmit the driving force of the motor to the crank.

In one embodiment, the power transmission system further comprises a support frame configured to support the drive mechanism, the support frame being mounted on the cutting device

The present invention further provides a power transmission system comprising: a drive mechanism for providing drive power, a first gear mechanism having at least one first link arm, the first link arm including a first end and a second end that are arranged opposite one another, wherein the first end is rotatably connected directly or indirectly to the first tool in the cutting device, wherein the second end is rotatably connected directly or indirectly to the second tool in the cutting device, and a second gear mechanism which is adapted to be driven by the drive mechanism in order to set the at least one first connecting arm in motion and thus to drive at least the first tool, which is rotatably connected directly or indirectly to the first connecting arm, in reciprocating motion with respect to the second tool in order to set Schneidar work to carry out.

• Der Rasenmäher gemäß einem Ausführungsbeispiel der Erfindung umfasst eine Werkzeuganordnung, eine Schneidantriebsanordnung, die an einer Oberseite der Werkzeuganordnung angeordnet und mit der Werkzeuganordnung gekoppelt ist, um die Werkzeuganordnung zum Mähen anzutreiben, eine Bodenabdeckung, die an dem Boden der Werkzeuganordnung angeordnet und lösbar mit der Werkzeugantriebsanordnung verbunden ist, um mindestens einen Teil der Werkzeuganordnung zwischen der Bodenabdeckung und der Werkzeugantriebsanordnung zu klemmen, einen Werkzeugentfernungsschalter, der an entweder der Bodenabdeckung oder der Werkzeugantriebsanordnung angeordnet. Der Werkzeugentfernungsschalter ist zwischen einer Verriegelungsposition und einer Entriegelungsposition bewegbar und derart eingerichtet, dass in der Verriegelungsposition die Bodenabdeckung mit der Werkzeugantriebsanordnung verbunden ist und in der Entriegelungsposition die Bodenabdeckung von der Werkzeugantriebsanordnung getrennt ist.

According to the present invention, the object is also achieved by another embodiment as follows:

• The lawnmower according to an embodiment of the invention comprises a tool assembly, a cutter drive assembly which is arranged on a top side of the tool assembly and is coupled to the tool assembly to drive the tool assembly for mowing, a floor cover which is arranged on the bottom of the tool assembly and is releasable with the tool drive assembly connected to clamp at least a portion of the tool assembly between the floor cover and the tool drive assembly, a tool removal switch located on either the floor cover or the tool drive assembly. The tool removal switch can be moved between a locking position and an unlocking position and is set up such that in the locking position the base cover is connected to the tool drive arrangement and in the unlocking position the base cover is separated from the tool drive arrangement.

In the lawnmower according to an exemplary embodiment of the present invention, at least a part of the tool assembly is clamped between the tool drive assembly and the floor cover by releasably connecting the floor cover and the tool drive assembly. By providing the tool removal switch, the disassembly and assembly of the bottom cover and the tool drive assembly can be conveniently controlled, thereby facilitating quick disassembly and assembly of the tool and providing a good user experience.

Optionally, the tool removal switch is arranged in the tool drive arrangement and has a first snap section, while the base cover has a second snap section which is designed to be used with the first snap section to be in locking connection.

Optionally, the tool slide switch also has a downwardly extending switch connecting arm, at the lower end of which the first snap section is formed.

Optionally, the base cover further has an upwardly extending base cover connecting arm, at the uppermost end of which the second snap section is formed.

Either the first or the second latching section optionally forms a latching hook, while the other of the components of the first and second latching section forms a latching slot which is suitable for the latching connection with the latching hook.

In accordance with another embodiment of the invention, the lawn mower further includes a resilient member disposed between the tool removal switch and the tool drive assembly.

Optionally, the tool removal switch is a pressure switch and the elastic element is a spring, the two axial ends of the spring each resting on the tool drive arrangement or the pressure switch.

Optionally, the tool drive arrangement is provided with a support plate which has a positioning section for positioning the elastic element.

According to an optional embodiment of the invention, the tool drive assembly includes a cutting motor coupled to the tool assembly to drive the tool assembly for mowing, and a shield covering the outside of the cutting motor. The tool removal switch is arranged on the shield, which has an escape opening for avoiding the tool removal switch.

Optionally, the tool removal switch is provided two in number, and the two tool removal switches are located on two opposite sides of the tool drive assembly.

• Eine Werkzeugvorrichtung des Rasenmähers gemäß einem Ausführungsbeispiel eines ersten Aspekts der Erfindung umfasst ein feststehendes Messer, das sich in Querrichtung erstreckt, ein bewegliches Messer, das über dem feststehenden Messer angeordnet ist und sich quer relativ zu dem feststehenden Messer hin- und herbewegen kann, und eine Verbindungsanordnung, die jeweils mit dem feststehenden Messer und dem beweglichen Messer verbunden ist, so dass mindestens ein Teil der Schneide des beweglichen Messers die Schneide des feststehenden Messers festdrückt.

According to the present invention, the object is also achieved by another embodiment as follows:

• A tool device of the lawn mower according to an embodiment of a first aspect of the invention comprises a fixed knife which extends in the transverse direction, a movable knife which is arranged above the fixed knife and can reciprocate transversely relative to the fixed knife, and a Connection arrangement which is connected to the fixed knife and the movable knife, so that at least a part of the cutting edge of the moving knife presses the cutting edge of the fixed knife.

In the tool device of the lawn mower according to an embodiment of the present invention, by pressing at least a part of the cutting edge of the movable knife against the cutting edge of the fixed knife, the friction between the cutting edge of the movable knife and the cutting edge of the fixed knife is increased when the movable knife of the Lawn mower is reciprocated transversely relative to the fixed blade, whereby a self-sharpening effect is achieved, so that the cutting edge is kept sharp, the frequency of tool changes is reduced, the cutting efficiency is improved and the cost of use is reduced.

According to an embodiment of the invention, the connecting arrangement comprises a positioning element attached to the fixed knife, the movable knife having a slide groove extending in the transverse direction, the positioning element being adapted to pass through the slide groove and extend along the length to move the sliding groove back and forth relative to the movable knife, and at least one biasing element which is connected to at least one of the fixed knife and movable knife components, so that at least part of the cutting edge of the movable knife is pressed against the cutting edge of the stationary knife becomes.

Optionally, the at least one preload element is connected between the fixed knife and the movable knife.

Optionally, the at least one preload element is a support platform which is arranged between the fixed knife and the movable knife, and the support platform is arranged facing away from the cutting edge of the movable knife.

Optionally, the support platform is arranged at at least one of the locations on a side of the fixed knife facing the movable knife, a side of the movable knife facing the fixed knife and a side wall of the positioning element.

Optionally, the at least one pretensioning element is designed as a magnet which is arranged between the fixed knife and the movable knife and is arranged such that it adjoins the cutting edge of the movable knife and / or the fixed knife.

Optionally, one end of the positioning element protrudes from the slide groove and has a chuck with an outer dimension that is greater than the width of the slide groove. The at least one prestressing element forms an elastic element which is connected between the chuck and the movable knife.

According to another exemplary embodiment of the invention, the connecting arrangement comprises a torsion spring, at least one part of the torsion spring being stationary and at least one other part of the torsion spring moving with the movable knife.

Optionally, the torsion spring is attached to the fixed knife and arranged facing away from the cutting edge of the fixed knife, and the two ends of the torsion spring are each connected to the movable knife.

Optionally, the fixed knife is provided with a limiting plate and the torsion spring is attached to the fixed knife by the limiting plate.

Furthermore, the fixed knife comprises a fixed knife holder and a fixed knife blade which is attached to the fixed knife holder, the delimitation plate being formed in one piece with the fixed knife holder.

• Eine Rasenmäherwerkzeugbaugruppe gemäß einem Ausführungsbeispiel des ersten Aspekts der Erfindung umfasst eine Schutzhaube, eine Werkzeuganordnung, die in der Schutzhaube angeordnet und von einer Innenwandoberfläche der Schutzhaube beabstandet ist, eine Antriebsanordnung, die mit der Werkzeuganordnung gekoppelt ist, um die Werkzeuganordnung zum Mähen anzutreiben, und eine Luftblasanordnung mit einem Luftkanal sowie einem Lufteinlass und einem Luftauslass, die mit dem Luftkanal verbunden sind, wobei der Luftauslass der Werkzeuganordnung und/oder dem Spalt zwischen der Werkzeuganordnung und der Schutzhaube zugewandt ist.

According to the present invention, the object is also achieved by another embodiment as follows:

• A lawnmower tool assembly according to an embodiment of the first aspect of the invention includes a guard, a tool assembly disposed within the guard and spaced from an inner wall surface of the guard, a drive assembly coupled to the tool assembly for driving the tool assembly for mowing, and a Air blowing arrangement with an air duct and an air inlet and an air outlet, which are connected to the air duct, the air outlet facing the tool arrangement and / or the gap between the tool arrangement and the protective hood.

In the lawn mower tool assembly according to an embodiment of the present invention, the provision of the air blow assembly enables the tool assembly and / or the gap between the tool assembly and the protective hood to be blown, thereby avoiding the problem that the grass is blocked by the gap between the grass chips the tool and guard cannot be let in, improving the cutting efficiency of the lawnmower and providing a better user experience.

According to an embodiment of the invention, the air blowing arrangement is driven by a drive arrangement in order to generate an air flow.

According to an exemplary embodiment of the invention, the air blowing arrangement comprises an air guiding element with the air duct and the air outlet and a rotatable fan for supplying air to the air duct in order to generate an air flow.

Optionally, the fan is driven to rotate by the drive arrangement.

The fan is optionally arranged in the air guide element.

The fan is optionally available as a radial fan.

According to a further exemplary embodiment of the invention, at least part of the air guiding element forms a curved tube that is bent in the direction of the tool arrangement.

The air guiding element is optionally designed in the form of a spiral housing.

Optionally, the drive arrangement is a motor which comprises a motor housing and a motor body, the fan being connected to a motor shaft of the motor body and the air guiding element forming part of the motor housing.

• Ein Rasenmäher gemäß einem Ausführungsbeispiel der Erfindung umfasst einen Gerätekörper, eine Bewegungsvorrichtung, die an dem Gerätekörper angeordnet ist, eine Werkzeugvorrichtung, die an der Vorderseite des Gerätekörpers angeordnet ist und sich relativ zu dem Gerätekörper schwebend bewegen kann, wobei die Werkzeugvorrichtung sich relativ zu dem Gerätekörper in Abhängigkeit von dem vorderen Gelände schwebend bewegt, um ein Hindernis zu überqueren oder einen Hang zu klettern.

According to the present invention, the object is also achieved by another embodiment as follows:

• A lawnmower according to an embodiment of the invention comprises an implement body, a moving device which is arranged on the implement body, a tool device which is arranged on the front of the implement body and can float relative to the implement body, wherein the implement device moves relative to the implement body moved floating depending on the front terrain to cross an obstacle or climb a slope.

In the lawnmower of the embodiment of the invention, the tool device is arranged on the front side of the tool body so that the corner position is better cut and the cutting result is improved. The tool device can move in a floating manner relative to the device body in accordance with the front terrain, as a result of which obstacles or inclines are overcome and the adaptability of the lawnmower to complex terrain is thus improved.

According to an exemplary embodiment of the invention, the lawnmower further comprises a connection arrangement which is respectively connected to the device body and the tool device, so that the tool device can move in a floating manner relative to the device body.

Optionally, the link assembly is a tie rod mechanism.

Optionally, the connection arrangement comprises a holder which is arranged on either the device body or the tool device, a movable push rod which is connected at one end to the holder and at the other end to the other of the device body and tool device components.

Optionally, the connection arrangement comprises a rotatable connection shaft via which the tool device is pivotably connected to the device body.

According to another embodiment of the invention, the lawnmower further comprises an obstacle negotiating drive assembly disposed on the tool body or the tool device, wherein the obstacle negotiating drive assembly is coupled to the linkage to drive the tool device to move relative to the tool body.

Still further, the lawnmower includes a transmission mechanism that is drivingly connected to the obstacle-negotiating drive assembly and the linkage assembly.

Optionally, the gear mechanism is one of belt drive mechanism, gear drive mechanism and worm gear mechanism, or a combination of at least two thereof.

Optionally, the link arrangement is driven directly by the obstacle negotiation drive arrangement.

According to one embodiment of the invention, the lawnmower further comprises a terrain detection sensor to detect whether there is an obstacle in front of the terrain or whether climbing a slope is necessary, a control module which is in communication with the terrain detection sensor or the obstacle-negotiating drive arrangement to control the obstacle-negotiating drive assembly in accordance with the terrain condition detected by the terrain detection sensor.

Optionally, the connection assembly is an electric push rod attached to either the tool body or the tool device, with a force output end of the electric push rod connected to the other of the tool body and tool device components.

According to another exemplary embodiment of the invention, the tool device comprises a tool guard which is connected to the tool body and can move in a floating manner relative to the tool body, a tool assembly and a tool drive assembly which drives the tool assembly for mowing, the tool assembly being built into the tool guard.

Optionally, the height of the tool arrangement within the tool protection hood can be adjusted.

Optionally, the lower area of the front of the tool protection hood is connected to a circular arc transition on the front edge of the underside.

Optionally, the surface of the front of the tool guard extends vertically from top to bottom gradually to the rear.

• Ein Rasenmäher gemäß einem Ausführungsbeispiel der Erfindung umfasst einen Gerätekörper mit einer Längsrichtung parallel zur Vorwärtsrichtung des Rasenmähers und einer Querrichtung parallel zur Arbeitsebene und senkrecht zur Längsrichtung, zwei Antriebsräder, die drehbar an dem Gerätekörper angeordnet sind und in Querrichtung voneinander beabstandet sind, und eine Werkzeugvorrichtung zum Mähen, die an dem Gerätekörper angeordnet ist und umfasst eine feststehende Klinge und eine bewegliche Klinge, die sich in Querrichtung relativ zu der feststehen Klinge hin- und herbewegt, wobei das Verhältnis der Schnittbreite der Werkzeugvorrichtung entlang der Querrichtung zu der Breite des Rasenmähers entlang der Querrichtung größer oder gleich 0,6 ist.

According to the present invention, the object is also achieved by another embodiment as follows:

• A lawn mower according to an embodiment of the invention comprises a device body with a longitudinal direction parallel to the forward direction of the lawn mower and a transverse direction parallel to the working plane and perpendicular to the longitudinal direction, two drive wheels which are rotatably arranged on the device body and are spaced apart from one another in the transverse direction, and a tool device for Mowing, which is arranged on the implement body and comprises a fixed blade and a movable blade that reciprocates in the transverse direction relative to the stationary blade, the ratio of the cutting width of the implement along the transverse direction to the width of the lawn mower along the transverse direction is greater than or equal to 0.6.

In the lawn mower according to the embodiment of the present invention, the cutting width of the lawn mower can be increased and the working efficiency of the lawn mower can be improved by using a tool device having a fixed blade and a reciprocating movable blade so that the cutting width of the tool device in the Cross direction meets the above conditions. Therefore, the lawn mower according to an embodiment of the present invention has the advantages of a compact arrangement of various components and a larger cutting width.

According to one embodiment of the invention, the cutting width of the tool device in the transverse direction is greater than or equal to 25 cm.

Optionally, the cutting width of the tool device in the transverse direction is greater than or equal to 38 cm.

According to an embodiment of the invention, the lawn mower further comprises at least one support wheel, which is attached to the device body, in order to adjust the center of gravity of the lawn mower.

The support wheel is optionally available as a swivel castor.

According to an optional exemplary embodiment of the invention, the longitudinal direction extends in the front-rear direction, in which the tool device is arranged on the front region of the device body and the support wheel is positioned behind the drive wheel.

According to another optional exemplary embodiment of the invention, the longitudinal direction extends in the front-rear direction, in which the tool device is arranged in the central region of the device body and the support wheel is positioned in front of the tool device.

According to one embodiment of the invention, the tool device is arranged in the transverse direction between the two drive wheels.

According to an exemplary embodiment of the invention, the lawnmower further comprises at least one auxiliary wheel which is arranged on the tool device and can move in a floating manner relative to the device body.

According to a further exemplary embodiment of the invention, the lawnmower further comprises two guide wheels and two caterpillars, the two guide wheels and the two drive wheels being arranged uniquely assigned in the longitudinal direction and the two caterpillars being wound around the assigned drive wheels and guide wheels in the longitudinal direction.

In some examples, the longitudinal direction extends in the front-rear direction in which the tool device is arranged in front of the two caterpillars or the tool device is arranged on the rear region of the device body and between the two caterpillars.

According to one embodiment of the invention, the height of the drive wheel is approximately equal to the height of the lawn mower.

Presentation of the invention

• 1 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 2 eine Werkzeugantriebsanordnung und eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 3 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer Montagezeichnung,
• 4 eine Werkzeugantriebsanordnung und eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer Explosionsdarstellung,
• 5 eine Werkzeugantriebsanordnung und eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 6 eine Bodenabdeckung und einen Werkzeugentfernungsschalter gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 7 eine Werkzeugantriebsanordnung und eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer schematischen Montagezeichnung,
• 8 eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer strukturellen Darstellung,
• 9 ein Verbindungselement gemäß einem Ausführungsbeispiel in einer schematischen Darstellung,
• 10 eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer schematischen Explosions-Ausschnittsdarstellung,
• 11 ein Kraftübertragungssystem gemäß einem Ausführungsbeispiel in einer schematischen Darstellung,
• 12 eine schematische Explosionsdarstellung gemäß 11,
• 13 eine Draufsicht auf einige Mechanismen gemäß 11,
• 14 eine Werkzeuganordnung des Rasenmähers gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 15 eine Werkzeuganordnung des Rasenmähers gemäß einem Ausführungsbeispiel in einer Seitenansicht,
• 16 eine Werkzeuganordnung des Rasenmähers gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 17 eine Werkzeuganordnung des Rasenmähers gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 18 ein elastisches Element der Werkzeuganordnung des Rasenmähers gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 19 eine Werkzeuganordnung gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 20 eine Werkzeugvorrichtung des Rasenmähers gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 21 eine Werkzeugvorrichtung des Rasenmähers gemäß einem Ausführungsbeispiel in einer Explosionsdarstellung,
• 22 eine Antriebsanordnung und eine Luftblasanordnung gemäß einem Ausführungsbeispiel in einer schematischen Montagezeichnung,
• 23 eine Draufsicht auf eine Antriebsanordnung und eine Luftblasanordnung gemäß einem Ausführungsbeispiel,
• 24 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 25 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer Seitenansicht,
• 26 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 27 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer Seitenansicht,
• 28 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer Seitenansicht,
• 29 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer Seitenansicht,
• 30 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 31 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 32 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 33 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 34 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung,
• 35 einen Rasenmäher gemäß einem Ausführungsbeispiel in einer schematischen strukturellen Darstellung.

The above object, configuration and advantageous effect of the present invention can be realized with reference to the drawings below. Show in it

• 1 a lawnmower according to an embodiment in a schematic structural representation,
• 2 a tool drive arrangement and a tool arrangement according to an exemplary embodiment in a schematic structural illustration,
• 3 a lawnmower according to an embodiment in an assembly drawing,
• 4th a tool drive assembly and a tool assembly according to an embodiment in an exploded view,
• 5 a tool drive arrangement and a tool arrangement according to an exemplary embodiment in a schematic structural illustration,
• 6 a base cover and a tool removal switch according to an exemplary embodiment in a schematic structural illustration,
• 7th a tool drive arrangement and a tool arrangement according to an embodiment in a schematic assembly drawing,
• 8th a tool arrangement according to an embodiment in a structural representation,
• 9 a connecting element according to an embodiment in a schematic representation,
• 10 a tool assembly according to an embodiment in a schematic exploded detail view,
• 11 a power transmission system according to an embodiment in a schematic representation,
• 12 a schematic exploded view according to 11 ,
• 13 a top view of some mechanisms according to 11 ,
• 14th a tool arrangement of the lawn mower according to an embodiment in a schematic structural representation,
• 15th a tool arrangement of the lawn mower according to an embodiment in a side view,
• 16 a tool arrangement of the lawn mower according to an embodiment in a schematic structural representation,
• 17th a tool arrangement of the lawn mower according to an embodiment in a schematic structural representation,
• 18th an elastic element of the tool assembly of the lawn mower according to an embodiment in a schematic structural representation,
• 19th a tool arrangement according to an embodiment in a schematic structural representation,
• 20th a tool device of the lawn mower according to an embodiment in a schematic structural representation,
• 21st a tool device of the lawn mower according to an embodiment in an exploded view,
• 22nd a drive assembly and an air blowing assembly according to an embodiment in a schematic assembly drawing,
• 23 a plan view of a drive arrangement and an air blowing arrangement according to an embodiment,
• 24 a lawnmower according to an embodiment in a schematic structural representation,
• 25th a lawnmower according to an embodiment in a side view,
• 26th a lawnmower according to an embodiment in a schematic structural representation,
• 27 a lawnmower according to an embodiment in a side view,
• 28 a lawnmower according to an embodiment in a side view,
• 29 a lawnmower according to an embodiment in a side view,
• 30th a lawnmower according to an embodiment in a schematic structural representation,
• 31 a lawnmower according to an embodiment in a schematic structural representation,
• 32 a lawnmower according to an embodiment in a schematic structural representation,
• 33 a lawnmower according to an embodiment in a schematic structural representation,
• 34 a lawnmower according to an embodiment in a schematic structural representation,
• 35 a lawnmower according to an embodiment in a schematic structural representation.

Concrete embodiments

In the following, exemplary embodiments of the present invention will be discussed in greater detail, the examples of which are shown in the accompanying drawings. The same or similar reference symbols always stand for the same or similar elements or elements with the same or similar functions. The following description of the exemplary embodiments with reference to the accompanying drawings is exemplary and serves only to explain the invention, without being understood as a restriction of the present invention.

It goes without saying in the description of the present invention that the terms "central", "longitudinal direction", "transverse direction", "length", "width", "thickness", "top", "bottom", "front", " rear "," left "," right "," vertical "," horizontal "," top "," bottom "," inside "," outside "," axial direction "," radial direction "," circumferential direction "etc. each used in relation to the representation in the respective figure, in order only to describe the invention and, if necessary, to simplify the description. In other words, these terms are not used either implicitly or explicitly to indicate the positioning, configuration and operation of the device or element in question in a predetermined positioning, so that the invention is not restricted here either. In the description of the present invention, the term “multiple” refers to a number of two or more, unless otherwise specified.

In the present invention, the terms "attach", "interconnected", " connect ”,“ fasten ”or the like, unless expressly stated otherwise, are to be understood in a broader sense. For example, it can be a fixed, detachable or one-piece connection as well as a mechanical and also an electrical connection. In addition, direct connections, indirect connections or connections produced via an intermediate piece as well as internal connections between two elements are also conceivable. As one of ordinary skill in the art, one can proceed from the facts in order to determine the meaning of the terms mentioned in accordance with the present invention.

The present invention provides a lawn mower as shown in FIG 1 and 2 shown. In the present embodiment, the lawn mower 1 a smart lawnmower. The lawnmower 1 includes a device body 3 , one on two sides of the device body 3 attached drive wheel 7th , a tool drive assembly 20th that are in the device body 3 is built in and a cutting motor 21st comprises a tool assembly 10 attached to the device body 3 attached and from the cutting motor 21st is driven, a control module (not shown) for controlling the automatic operation and movement of the lawn mower 1 and an energy module (not shown) for providing energy. In the implement body, the forward direction of the lawn mower is defined as the longitudinal direction of the implement body, the direction perpendicular to the floor is defined as the vertical direction of the implement body, and the direction perpendicular to both the longitudinal direction and the vertical direction is defined as the transverse direction of the implement body. Of course, in other embodiments, the lawn mower 1 also be a manually operated lawn mower, such as a hand mower.

In one embodiment, the cutting motor is 21st on the machine body 3 attached and the power is using a reduction gear 22nd transferred to the gear shaft. The tool arrangement 10 is used to carry out cutting work and comprises a first cutting element and a second cutting element which move to and fro relative to one another. Power is transmitted from the first cutting element and the gear shaft via an eccentric gear mechanism so that the rotational movement of the gear shaft is converted into a reciprocating movement of the first cutting element. The first cutting element comprises a movable knife 12 and the second cutting element comprises a fixed knife 11 .

The cutting module of a conventional lawnmower consists of several knives attached to a knife disc. Compared to a knife-disk-like cutting module, the scissors-like tool has a larger effective working area and a higher cutting efficiency per unit of time.

As in 3 shown is the tool drive assembly in one embodiment 20th with the tool arrangement 10 coupled to the tool assembly 10 to drive to mow. The lawnmower 1 further comprises a locking mechanism 15th , via which the tool arrangement 10 on the device body 3 is attached, and the tool assembly 10 is removable.

As in 5 is shown in some embodiments outside of the tool assembly 10 a tool protection hood 25th mounted to prevent the user from operating the tool assembly 10 exposure to injury as a result of touch.

How out 4th results, comprises in one embodiment the locking mechanism 15th a floor cover 30th attached to the device body 3 is appropriate. The bottom cover 30th is at the bottom of the tool assembly 10 arranged and releasable with the tool drive assembly 20th connected to at least a portion of the tool assembly 10 between the bottom cover 30th and the tool drive assembly 20th to clamp.

The locking mechanism 15th further comprises a locking element 155 that is attached to the device body 3 or the bottom cover 30th is arranged. Alternatively, it can be attached to both the device body 3 as well as on the base cover 30th be arranged to cooperate with each other. The locking element 155 comprises at least two positions, namely a locking position and an unlocking position. When the locking element is in the locking position 155 is the bottom cover 30th on the device body 3 mounted while with the locking element in the unlocked position 155 the bottom cover 30th from the device body 3 can be separated.

In one embodiment, the locking element is 155 a tool removal switch 41 that is attached to either the bottom cover 30th or the tool drive assembly 20th is arranged. The tool removal switch 41 is movable between a locking position and an unlocking position and is designed to provide a latching connection of the base cover in the locking position 30th with the tool drive assembly 20th manufacture and in the unlocked position the base cover 30th from the tool drive assembly 20th to separate.

The tool drive assembly is used to remove the tool 20th by pressing the tool removal switch 41 from the bottom cover 30th separated, eliminating the need to replace the tool assembly 10 and the operation is simplified.

In the lawn mower according to an embodiment of the present invention, at least a part of the tool assembly 10 between the tool drive assembly 20th and the bottom cover 30th clamped by the bottom cover 30th and the tool drive assembly 20th are releasably connected. By providing the tool removal switch 41 can dismantle and reassemble the bottom cover 30th and the tool drive assembly 20th can be controlled conveniently, which facilitates quick tool disassembly and assembly and provides a good user experience.

According to one embodiment of the invention, the tool drive assembly is 20th detachable with the base cover 30th connected by a snap connection, which ensures a simple and compact structure and a comfortable and reliable connection.

How out 6 can be seen is the tool removal switch 41 in the tool drive assembly 20th arranged and has a first snap portion 412 on while the bottom cover 30th a second snap section 32 which is adapted to the first snap portion 412 to be in locking connection. Either the first latching section optionally forms 412 or the second latching section 32 a locking hook, while the other of the components first locking portion 412 and second latching section 32 forms a locking slot which is suitable for locking connection with locking hooks.

In one embodiment, the tool removal switch 41 a snap hook on and the base cover 30th has one on the latch on the tool removal switch 41 coordinated locking slot. Alternatively, the tool removal switch has 41 a locking slot and the base cover 30th has one on the locking slot of the tool removal switch 41 coordinated locking hook on, what a comfortable and reliable connection.

In one embodiment, the tool removal switch 41 also a downwardly extending switch link arm 411 on, at the lower end of the first latching section 412 is designed so that the first latching portion 412 towards the bottom cover 30th extends to a locking connection with the second locking portion 32 on the base cover 30th to manufacture.

In one embodiment, the base cover 30th also an upwardly extending floor cover link arm 31 on, at the upper end of the second latching section 32 is designed so that the second latching portion 32 toward the tool drive assembly 20th extends to a locking connection with the first locking portion 412 on the tool removal switch 41 to manufacture.

In one embodiment is a tool removal switch 41 each on two opposite sides of the tool drive assembly 20th arranged (for example, the left and right sides, as in 4th shown). Any tool removal switch 41 has a switch link arm 411 which extends in a vertical direction (the upright direction, as in 7th shown). In other words, the switch link arm extends 411 towards the bottom cover 30th and the lower end of the switch link arm 411 is with a first locking section 412 (e.g. a locking hook or a locking slot).

Furthermore, the two opposite sides are the bottom cover 30th (the left and right sides, as in 4th shown) each with a bottom cover link arm 31 each floor cover link arm 31 extends vertically, so in the direction of the tool drive assembly 20th , and the top of the bottom cover link arm 31 with a second latching section 32 (z. B. a locking slot or a locking hook) formed.

The tool removal switch is used to remove the tool 41 actuated so that the first latching section 412 and the second latching portion 32 no longer interact with one another and thus the tool drive arrangement 20th from the bottom cover 30th is separated, thereby replacing the tool assembly 10 is facilitated. After the tool change, the bottom cover is 30th to the underside of the tool assembly 10 mounted and the tool drive assembly 20th to the top of the tool assembly 10 assembled. Then by pressing the tool removal switch 41 the bottom cover 30th , the tool arrangement 10 and the tool drive assembly 20th assembled, which ensures easy disassembly and assembly and convenient operation.

In one embodiment, the lawn mower further comprises an elastic element 42 that is between the tool removal switch 41 and the tool drive assembly 20th is arranged. By providing the elastic element 42 between the tool removal switch 41 and the tool drive assembly 20th becomes a flexible connection of the tool removal switch 41 with the tool drive assembly 20th produced, resulting in an improved operational feeling when the tool removal switch is operated 41 and thus contributes to a better user experience. Furthermore, noise during operation can be reduced and the quality of the lawn mower can be improved.

In some examples, the tool removal switch 41 be designed as a push button. For example is the tool removal switch 41 on the left and right sides of the tool drive assembly 20th arranged and each tool removal switch 41 can be moved in the front and back directions. The user can use the tool removal switch 41 perform an actuation by sliding the tool removal switch.

In some other embodiments, the tool removal switch is 41 a push switch and the elastic member 42 a spring, the two axial ends of the spring being each on the tool drive assembly 20th or the pressure switch.

How out 4th As can be seen, the axial direction of the spring extends in the left-right direction and the push switch can be pressed in the left-right direction. For example, the left end position of the push switch on the left is the locking position and the right end position of the push switch on the left is the unlocking position.

Similarly, the left end position of the pressure switch on the right is the locking position and the right end position of the pressure switch on the right is the unlocking position. By actuating the pressure switch, it is moved between the locking position and the unlocking position, whereby the first latching section 412 and the second latching portion 32 be brought into locking connection or separated, which ensures simple assembly and convenient operation.

In some examples, the tool drive assembly is 20th with a support plate 43 provided that have a positioning section 431 for positioning the elastic element 42 has, whereby the positioning and assembly of the elastic element 42 and the reliability of use of the tool removing switch 41 is ensured.

According to an optional exemplary embodiment of the invention, the tool drive arrangement comprises 20th a cutting motor 21st for driving the tool assembly 10 for mowing.

Optionally, the cutting motor 21st be a motor and the cutting motor 21st is with the tool assembly 10 connected. A motor housing 23 is outside of the cutting motor 21st arranged to the tool drive assembly 20th to protect. Also is the tool removal switch 41 on the motor housing 23 arranged and the motor housing 23 has an escape opening 231 to evade the tool removal switch 41 on, thereby facilitating the assembly and operation of the tool removal switch 41 be relieved.

In some examples the backing plate is 43 at the escape opening 231 of the motor housing 23 arranged and the outwardly facing side of the support plate 43 is with a positioning section 431 which can form a positioning protrusion over the surface of the support plate 43 protrudes.

The tool release switch also includes 41 a switch body and a switch link arm 411 , the upper end of the switch link arm 411 is connected to the lower side of the switch body. The switch body of the tool release switch 41 is at the escape opening 231 arranged and is outside the motor housing 23 for ease of use for users free. The switch connection arm 411 of the tool removal switch 41 is inside the motor housing 23 arranged to snap into engagement with the bottom cover 30th to stand. The spring is between the pressure switch and the support plate 43 connected and the spring is through the positioning section 431 on the support plate 43 positioned, which ensures simple construction, high connection reliability, convenient installation and good user-friendliness.

When the tool assembly 10 located at the front of the main body of the lawnmower is the tool assembly 10 surrounded by the motor housing of the tool. To change the tool, press the tool removal switch 41 the tool arrangement 10 and removing the motor housing of the tool and unscrewing the nut over the motor housing of the tool with a wrench. Then the tool motor housing is removed and a new tool assembly is installed 10 substituted in.

When the tool assembly 10 is in the center of the lawnmower, the lawnmower is lifted or turned over from behind. Then becomes the tool removal switch 41 with one hand pressed to the tool assembly 10 to remove and a new tool assembly 10 to exchange.

In one embodiment, the lawnmower comprises 1 a tool assembly 10 , a tool drive assembly 20th , a bottom cover 30th and a locking element 155 . Specifically, the locking element includes 155 two tool removal switches 41 , two elastic elements 42 and two support plates 43 .

How out 9 results, comprises in one embodiment the locking mechanism 15th a threaded fastener 16 , which can be designed in the form of a screw, a bolt or the like. The tool arrangement 10 can via the threaded connector 16 directly on the device body 3 be attached. The disassembly and assembly of the tool assembly 10 can by interacting with the threaded connection element 16 will be realized.

It will be on 4th pointed out. The tool drive assembly 20th is at the top of the tool assembly 10 arranged and includes a cutting motor 21st (e.g. a motor) and a reduction gear 22nd . The output shaft of the cutting motor 21st is connected to an input shaft of the reduction gear 22nd connected and the output shaft of the reduction gear 22nd is with a connecting gear element 24 on the tool assembly 10 connected, making the movable knife 12 to move back and forth relative to the fixed knife 11 is driven. The motor housing 23 covers the cutting motor 21st and the reduction gear 22nd from the outside and has two opposing escape openings 231 on, with each escape opening 231 with a downwardly extending support plate 43 is provided, on the outwardly directed side of a positioning portion 431 is provided.

As in 4th shown comprises the tool drive assembly 20th a rotary gear element 26th . In one embodiment, the rotary gear element comprises 26th a plurality of conical projections and accordingly comprises the tool assembly 10 a connecting gear element 24 , which has an indentation which is matched to the conical projection, so that the rotary gear element 26th with the connecting gear element 24 can interact and be connected to it. When the tool assembly 10 at the rear of the device body 3 is mounted, the rotary gear element acts 26th with the connecting gear element 24 together so that the tool drive assembly is the movable knife 12 can drive.

In one embodiment, the rotary gear element 26th a protrusion having a particular shape, for example a hexagonal protrusion. The connecting gear element 24 can accordingly comprise a hexagonal indentation. The structural design of the rotary gear element 26th and the connecting gear element 24 makes it easier for the user to adjust the tool arrangement 10 to mount in the correct position.

The bottom cover 30th is at the bottom of the tool assembly 10 arranged and is in releasable locking connection with the tool drive assembly 20th . Specifically, the ground cover points 30th two floor cover link arms 31 which are opposed to each other and the upper end of each of the floor cover link arms 31 is with a second snap section 32 Mistake. The two tool removal switches 41 are each at the two escape openings 231 of the motor housing 23 located and between each tool removal switch 41 and the support plate 43 is an elastic element 42 arranged. Any tool removal switch 41 has a downwardly extending switch link arm 411 on, the lower end of which is provided with the second snap portion 32, which is adapted to be in locking connection with the first engagement portion 412 to stand.

To remove the tool, press the tool removal switch 41 the tool removal switch 41 pressed to the first snap section 412 from the second snap section 32 to solve and thus the tool removal switch 41 from the bottom cover 30th to separate while the tool assembly 10 from the bottom cover 30th is separated. The tool arrangement 10 is removed and replaced with a new tool assembly 10 replaced. Alternatively, you can use the positioning pin 132 and the connecting element 70 the tool arrangement 10 removed to the fixed knife 112 or the movable knife 122 to be replaced separately and thus to achieve a quick tool change.

After the tool change, the bottom cover is 30th to the underside of the tool assembly 10 mounted and the tool drive assembly 20th to the top of the tool assembly 10 assembled. Then by pressing the tool removal switch 41 the bottom cover 30th , the tool arrangement 10 and the tool drive assembly 20th assembled, which ensures comfortable operation.

How out 7th can be seen, includes the tool assembly 10 a fixed one knife 11 and a movable knife 12 , the movable knife 12 relative to the fixed knife 11 can move back and forth. The fixed knife 11 and the movable knife 12 are about the fastener 70 movably connected.

In one embodiment, the includes a fixed knife 11 a fixed knife holder 111 and a fixed knife blade 112 and the movable knife 12 is a one-piece element. In one embodiment, the includes a fixed knife 11 a fixed knife holder 111 and a fixed knife blade 112 . The fixed knife holder 111 and the fixed knife blade 112 are each with a positioning hole 131 provided and the fixed knife holder 111 and the fixed knife blade 112 are connected to each other through one in the positioning hole 131 inserted positioning pin 132 connected. The movable knife 12 includes a movable knife holder 121 and a movable knife blade 122 by the fastener 70 are connected.

In one embodiment, the connector is 70 a solid fastener. How out 7th results are about the fastener 70 the movable knife holder 121 and the movable knife blade 122 firmly connected. The tool drive assembly 20th drives the movable knife blade 122 by driving the movable knife holder 121 so that the movable knife blade 122 synchronized with the movable knife holder 121 relative to the fixed knife 11 moved back and forth. The connecting element 70 can be in the form of a bolt, a screw or the like.

In one embodiment, as shown in 8th and 9 shown is one side of the connector 70 on the movable knife holder 121 attached while the other side of the fastener 70 a positioning key 141 contains the movable knife blade 122 so that connects the position of the movable knife blade 122 relative to the position of the movable knife holder 121 is attached.

In one embodiment, the connector is 70 a movable connecting element. As in 11 to 13 shown comprises the connecting element 70 a first gear element 200 with at least one first connecting arm 210 and a second gear element 300 that is achieved by the tool drive assembly 20th is driven to the at least one first connecting arm 210 to move, making at least the movable knife 12 that is at least rotatable directly or indirectly with the first connecting arm 210 is connected to reciprocate with respect to the fixed knife 11 driven to perform mowing work.

In the present exemplary embodiment, the first transmission element 200 two first link arms 210 on, each of the first link arms 210 may include a first end and a second end disposed opposite one another. As the number of the first link arms 210 two is can the movable knife 12 , the connecting plate 600 and the first two link arms 210 form a four-bar mechanism. The structure and function of the connecting plate 600 correspond to those of the movable tool holder 121 .

Furthermore, the first end is rotatable directly or indirectly with the movable knife 12 in the tool arrangement 10 connected and the second end is directly or indirectly rotatable with the fixed knife 11 in the tool arrangement 10 connected.

In the present embodiment, the knife is movable 12 directly rotatably connected to the first end and the fixed knife 11 is about the connecting plate 600 rotatably connected to the second end. Specifically, the two ends of the first link arm 210 via a first connection unit 510 or a second connection unit 520 rotatable with the movable knife 12 and the connecting plate 600 be connected.

At least one first link arm 210 is rotatable at the same time as the movable knife 12 and the fixed knife 11 in the tool arrangement 10 connected, wherein there is rolling friction at the contact point, whereby sliding friction is avoided, which is generated by conventional guide components. The rolling friction is lower than the sliding friction, whereby contact wear and transmission losses are reduced, noise is reduced and the service life of the entire device is extended.

In the present embodiment, between the first connection unit 510 on the one hand and the first end or the movable knife 12 on the other hand, a first rotating sleeve 530 provided and between the second connection unit 520 on the one hand and that second end or the connecting plate 600 a second rotating sleeve 540 be provided. Specifically are the first rotating sleeves 530 and the second rotating sleeve 540 each on the first connection unit 510 or the second connection unit 520 postponed. At this time the first rotating sleeve is in place 530 in contact with the first connection unit 510 or the movable knife 12 and the second rotating sleeve 540 in contact with the second end or the connecting plate 600 . In one embodiment, the first rotating sleeve 530 and / or the second rotating sleeve 540 be a copper sleeve or a bearing. Thus, by providing the rotary sleeve, the rolling friction of the rotatable connection can be further reduced and thus the wear and the transmission loss can be reduced.

In one embodiment, the first connection units are 510 and the second connection unit 520 accordingly a first pin and a second pin and both ends of the first connecting arm 210 are on the movable knife via the first pin and the second pin, respectively 12 or the connecting plate 600 hinged. Specifically, the first end and the movable knife 12 each be provided with a first through hole and a second through hole for passing one end of the first pin, while the second end and the connecting plate 600 are each provided with a third through hole and a fourth through hole for passing through one end of the second pin. Now the first pin runs through the first through hole and the second through hole and the second pin runs through the third through hole and the fourth through hole, so that the two ends of the first connecting arm 210 each on the movable knife 12 or the connecting plate 600 are hinged. To prevent the tool assembly 10 or the first coupling arm 210 trembling and loosening during the cutting process, an axial fastener, which may be a commonly used fastener nut or other fastener, may be mounted on the free end of the first pin and the second pin.

In the present embodiment, the first link arm 210 a straight strip and the first end and the second end are each two ends of the straight first connecting arm 210 .

In one embodiment, the link mechanism is a parallel four-bar mechanism. As in 13 is shown concretely the connection line of the connection points between the first end of the two first connecting arms 210 and the movable knife 12 defined as L1 and the line connecting the direct or indirect connection points between the second end of the two first connecting arms 210 and the fixed knife 11 is defined as L2. L1 and L2 are arranged parallel to each other and L1 corresponds to the direction of the reciprocating movement of the tool. Therefore, the connecting rod mechanism now formed is a parallel four-bar mechanism. Thus, regardless of how the first connecting arm 210 moves, the movable knife 12 driven to move in the theoretical reciprocating direction relative to the fixed knife 11 to move. If both the movable knife 12 as well as the fixed knife 11 are strip-shaped, the movable knife can move 12 linearly along the long axis of the tool relative to the fixed knife 11 to move back and fourth.

In addition, when the connecting rod mechanism is a parallel four-bar mechanism, the height can be automatically adjusted according to the height of the cutting plane, which improves the cutting efficiency and accuracy.

How out 11 to 13 results, that includes a second gear element 300 in the present embodiment a crankshaft 310 and a seesaw 320 and is driven by the tool drive assembly 20th driven to the at least one first link arm 210 to move, making at least the movable knife 12 that is at least rotatable directly or indirectly with the first connecting arm 210 is connected to reciprocate with respect to the fixed knife 11 driven to perform mowing work. The second gear element 300 may with an intermediate portion of the at least one first connecting arm 210 be connected.

The crankshaft 310 is with the tool drive assembly 20th connected and is from the tool drive assembly 20th driven to transmit the driving force. In this embodiment, the crankshaft 310 an eccentric wheel. In other exemplary embodiments, the crankshaft 310 be an eccentric piece or an eccentric rod.

One end of the seesaw 320 is with the at least one first connecting arm 210 connected and the other end is to the crankshaft 310 connected. The seesaw 320 is through the crankshaft 310 driven to the first link arm 210 , the one with the seesaw 320 connected to set in motion. In the present embodiment, the rocker 320 with the first link arm 210 connected. Specifically, the seesaw 320 with the intermediate portion of the first link arm 210 be connected and their junction may be located between the first end and the second end. The connection can be a permanent connection. Thus, the movement of the first gear element 200 facilitated. In addition, a rotary sleeve can be provided at the hinge connection point in order to reduce the wear of the gear element at the hinge connection point. In other exemplary embodiments, the second transmission element 300 further comprise an intermediate rod, both ends of which each with the rocker 320 or the first link arm 210 are connected. The seesaw 320 can via the intermediate rod with at least two first connecting arms 210 be connected, creating a plurality of first connecting arms 210 are driven to move.

In one embodiment, when the crankshaft 310 is an eccentric wheel and the eccentric wheel is rotated one revolution, becomes the movable knife 12 in the tool arrangement 10 offset in a reciprocating motion for exactly one cycle.

In the present embodiment, as shown in 11 to 13 shown comprises the tool drive assembly 20th a cutting motor 21st and a reduction gear 22nd that with the cutting motor 21st is coupled. The reduction gear 22nd is with the crankshaft 310 in the second gear element 300 connected and transmits the driving force of the cutting motor 21st on the crank 310 in the second gear element 300 . The cutting motor 21st can be a common motor in this field and the reduction gear 22nd may be a gear reduction gear that may include a mounting frame, a box body disposed on the mounting frame, a first input shaft and a first output shaft disposed on the box body, and a gear set disposed within the box body. In the present embodiment, the mounting frame on the connecting plate 600 be mounted and the rocker 320 is between the mounting frame and the connecting plate 600 arranged and runs through the mounting frame. The mounting frame is provided with a space that allows the rocker 320 allows to move back and forth, which in addition to ensuring normal cutting work, the structure of the entire device becomes more compact. Of course, in other exemplary embodiments, the mounting frame can be mounted at other suitable locations.

The first input shaft and the first output shaft are connected to the output shaft and the crank shaft310 of the engine, respectively. The output shaft of the motor rotates in the circumferential direction and displaces the first output shaft through the gear train of the reduction gear 22nd in rotation causing the crankshaft 310 is driven to rotate, and then the rotation of the crankshaft 310 through the second gear element 300 in a back and forth oscillation of the seesaw 320 converted, bringing the first connecting arm 210 , the one with the seesaw 320 connected, is driven to move. Eventually that becomes the first link arm 210 connected tool in the tool assembly 10 moved to and fro to perform cutting work.

In the present embodiment, the number is the first gear element 200 and the second gear element 300 equal and is one. In other exemplary embodiments, the number of the first transmission element 200 and the second gear element 300 be different or be a multitude. If thus the first transmission element 200 and the second gear element 300 can be provided in a different number, the power transmission can be achieved by individually controlling the first transmission element 200 or the second gear element 300 be performed. In addition, by providing an intermediate piece, a transition connection can be made in order to realize the power transmission.

In another embodiment, both the movable knife 12 as well as the fixed knife 11 be movable knives and the two components can be driven and perform a reciprocating movement relative to each other. The directions of movement of the two components can be the same or opposite. If the directions of movement of the two components are opposite, the speed of movement of the movable knife is 12 and the fixed knife 11 not limited. If the directions of movement of the two components are the same, the movable knife should 12 and the fixed knife 11 have different speeds of movement, so that the movable knife 12 and the fixed knife 11 move back and forth relative to each other.

The blade shape of the movable knife 12 and the fixed knife 11 is preferably the same and a common straight shape is conceivable for the two components. In other embodiments, the two components can also be arcuate or wave-shaped or have other identical or different blade shapes that meet the cutting requirements. If the two tools are arcuate, the power transmission system can drive one of the tools to move arcuately back and forth relative to the other tool.

In one embodiment, the mass and thickness of the blade of the movable knife 12 and the fixed knife 11 be equal. In another embodiment, the blade mass and thickness of the movable knife are smaller than the blade mass and thickness of the fixed knife. This can further reduce the friction between the movable knife and the fixed knife, the overall stability of the tool assembly 10 improve and reduce noise.

In one embodiment, the contact surface of at least one of the components is movable knife 12 and fixed knife 11 provided with a groove. The groove can consist of several perforated recesses or blind grooves. Thus, the contact area between the first knife and the second knife can be reduced, whereby the sliding friction between the first knife and the second knife is reduced. The groove can be on the fixed knife 11 and / or the fixed knife 11 be arranged. In the present embodiment, the groove is on the fixed knife 11 arranged.

In the following, the cutting process in some embodiments of the present exemplary embodiment will be discussed in greater detail with reference to the accompanying drawings.

As in 11 to 13 shown is the motor with the reduction gear 22nd connected, whose first output shaft is connected to the eccentric gear, which is connected to the rocker by a bearing 320 connected is. The two rockers, the connecting plate 600 and the movable knife 12 are connected to a parallel four-bar mechanism. The seesaw 320 is one of the first connecting arms 210 connected. The fixed knife 11 is located under the movable knife 12 and is via a fastening element, for example a bolt, to the connecting plate 600 connected. When the motor turns, the seesaw will 320 Driven by the eccentric wheel and the rocker 320 drives the first link arm 210 so that the movable knife 12 in the four-bar mechanism, which includes the first connecting arm 210 exists relative to the fixed knife 11 moved back and forth, which enables the cutting function.

13 shows the starting position of the movable knife 12 . During the operation of the tool assembly 10 first the eccentric wheel moves counterclockwise to the rocker 320 to drive to move. The seesaw 320 pushes the four-bar mechanism to the left and the movable knife 12 moves to the left. Now the movable knife moves 12 up to the leftmost position. The eccentric wheel then moves counterclockwise around the rocker 320 to drive to move. The seesaw 320 pushes the four-bar mechanism to the right and the movable knife 12 moves to the right. Now the movable knife returns 12 back to the starting position. The eccentric wheel then moves counterclockwise around the rocker 320 to drive to move. The seesaw 320 pushes the four-bar mechanism to the right and the movable knife 12 moves to the right. Now the movable knife moves 12 up to the far right position. Finally, the eccentric wheel moves counterclockwise and drives the rocker 320 to move. The seesaw 320 pushes the four-bar mechanism to the left and the movable knife 12 moves to the left. Now the movable knife returns 12 back to the starting position. When the above eccentric wheel rotates one revolution, the movable knife reciprocates for one cycle from left to right, thereby achieving the cutting function.

As a variation, one of the components is the first end and movable knife 12 provided with a first column (not shown) and the other with a through hole for inserting the first column. One of the components second ends and connecting plate 600 is provided with a second column (not shown) and the other is provided with a through hole for inserting the second column. Thus, the first column and the second column can be inserted into the corresponding through holes to provide a rotary connection between the first connecting arm 210 , the movable knife 12 and the connecting plate 600 to realize. This not only ensures normal cutting work, but also a more compact structure of the entire device. Of course, in other embodiments, the mounting frame can be mounted in other suitable locations.

Furthermore, a rotating sleeve, which can be a copper sleeve or a bearing, can be placed at the point of contact between the outer wall of the first column and the movable knife 12 or the fixed knife 11 be provided. Thus, the rolling friction between the first link arm 210 and the tool arrangement 10 can be reduced via the rotary sleeve, so that the noise can be further reduced and the service life can be provided.

As a variant, it differs from the straight first connecting arm 210 in the above exemplary embodiments provided that in the present embodiment the first connecting arm 210 be polygonal or curved or have another suitable shape. When the first link arm 210 is polygonal, both ends of the first connecting arm can 210 with two tools in the tool arrangement 10 be connected. The first two connecting arms now form 210 , the movable knife 12 and the connecting plate 600 / the fixed knife 11 a four-bar mechanism.

As a variant there is the number of the first link arm 210 at one. The first link arm 210 is direct or indirect with the movable knife 12 and the fixed knife 11 on the tool assembly 10 connected.

Another variant is the number of the first link arm 210 with three of the more. Now the number of the with the first connecting arm 210 connected element can be increased or adjusted accordingly.

As a variant, the tool assembly includes 10 furthermore at least one third tool. The third tool and the first and the second tool can be arranged one above the other. The cutting efficiency can be improved by adding the first gear element 200 with a variety of tools in the tool assembly 10 is connected to the reciprocating movement of at least three tools in the tool assembly 10 control relative to each other.

As a variant, the first end and the second end do not necessarily have to be in two end positions of the first connecting arm 210 be arranged. The two components can be in the middle of the first link arm 210 be arranged, now the junction of the first connecting arm 210 with the tool arrangement 10 not necessarily at two end positions of the first link arm 210 must be arranged. Furthermore is the seesaw 320 with an intermediate position of the first link arm 210 connected, wherein the intermediate position may be a position between the first end and the second end or a position far from the first end or the second end.

As a variant, the power transmission system further comprises a support frame (not shown) that supports the tool drive arrangement 20th and on the tool assembly 10 is arranged. Now the tool drive assembly can 20th contain only one motor that can be placed on the support frame. Specifically, the support frame consists of a large number of support rods attached to the connecting plate 600 are arranged, and a support platform for supporting the tool drive assembly 20th . Between the several support rods there is a swinging amplitude of the rocker 320 coordinated gap provided.

In another embodiment, the connecting plate is omitted 600 and the two ends of the first link arm 210 can directly with the movable knife 12 or the fixed knife 11 be connected. Specifically, the two ends of the first link arm 210 Via a third connection unit (not shown) or a fourth connection unit (not shown) rotatable with the movable knife 12 and the fixed knife 11 be connected. Between the third connection unit on the one hand and the first end or the movable knife 12 on the other hand, a third rotating sleeve is provided. Between the fourth connection unit on the one hand and the second end or the fixed knife 11 on the other hand, a fourth rotating sleeve is provided. Specifically, the third rotating sleeve and the fourth rotating sleeve can each be pushed onto the third connection unit or the fourth connection unit. The third rotating sleeve is now in contact with the first connecting unit or the first cutting element and the fourth rotating sleeve is in contact with the second end or the second cutting element. In one embodiment, the first rotating sleeve 530 and / or the second rotating sleeve 540 be a copper sleeve or a bearing. Thus, by providing the rotary sleeve, the rolling friction of the rotatable connection can be further reduced and thus the wear and the transmission loss can be reduced.

Similarly, between the movable knife 12 and the first link arm 210 a transition element can be provided via which a connection between the movable knife 12 and the first link arm 210 will be produced.

Furthermore, the third connection unit and the fourth connection unit can be designed as a pin structure. The first end and the movable knife 12 as well as the second end and the fixed knife 11 are each provided with through holes for passing one end of the associated pin. Now the single pin runs through the associated through hole, so that the two ends of the first connecting arm 210 each on the movable knife 12 or the fixed knife 11 are hinged. To prevent the tool assembly 10 or the first coupling arm 210 trembling and loosening during the cutting operation, of course, an axial fastener, which may be a commonly used fastening nut or other fastener, may be mounted on the free end of the pin. Of course, in another embodiment, the third connection unit and the fourth connection unit can be formed as a structure that is similar to the first column and the second column, and a repetition is omitted here.

It is also provided that the movable knife 12 , the fixed knife 11 and the first two connecting arms 210 form a four-bar mechanism. The seesaw 320 in the second gear element 300 can with an intermediate portion of the first link arm 210 be connected. The concrete content is similar to that of the first exemplary embodiment and a repetition is not required here.

In one embodiment, as shown in 14th to 19th shown comprises the tool assembly 10 a fixed knife 11 , a movable knife 12 and a connector 70 . The fixed knife 11 extends in the transverse direction (left-right direction in 14th ). The movable knife 12 is above the fixed knife 11 arranged and can be relative to the fixed knife 11 move back and forth in the transverse direction. The connecting element 70 is with the fixed knife 11 or the movable knife 12 connected so that at least part of the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 is pressed.

By removing at least part of the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 is pressed is relative to the fixed knife 11 moving knife reciprocating in the transverse direction 12 of the lawnmower, the friction between the cutting edge of the fixed knife 12 and the cutting edge of the fixed knife 11 increased, thereby achieving a self-sharpening effect so that the cutting edge can be kept sharp, the number of tool changes is reduced, the cutting efficiency is improved, the cost of use is reduced, and the user experience is improved.

As in 14th to 18th shown comprises the connecting element 70 according to an embodiment of the invention, a positioning element 71 and at least one biasing element. The positioning element 71 extends in a vertical direction (upright direction in 14th ) and is on the fixed knife 11 appropriate. The movable knife 12 has a transverse sliding groove 121 on and the positioning element 71 is to go through the sliding groove 121 furnished. When the movable knife 12 relative to the fixed knife 11 moved back and forth is the positioning element 71 stationary and moves in the length direction of the sliding groove 121 relative to the movable knife 12 back and forth.

In some embodiments, at least one biasing element is with the stationary knife 11 connected so that at least part of the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 is pressed. In other examples, at least one biasing element is associated with the movable knife 12 connected to at least part of the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 to press.

Of course, it is also possible to use the pre-tensioning element with the fixed knife 11 or the movable knife 12 to connect so that the cutting edge of the movable knife 12 and the cutting edge of the fixed knife 11 are pressed against each other and relative to the fixed knife 11 moving movable knife 12 the friction between the cutting edge of the movable knife 12 and the cutting edge of the fixed knife 11 is increased, whereby a self-sharpening effect is achieved.

How out 14th to 16 As can be seen, in some examples there is at least one preloading element between the stationary knife 11 and the movable knife 12 connected.

In the example according to 14th and 15th at least one biasing element is a support platform 721 that between the fixed knife 11 and the movable knife 12 is pinched and in one of the cutting edge to the back of the movable knife 12 directed direction (the front-back direction according to 14th and 15th ) the support platform 721 from the cutting edge of the movable knife 12 is arranged facing away, so that the support platform 721 the back of the movable knife 12 lifts so that the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 is pressed, reducing the friction between the movable knife 12 and the fixed knife 11 is increased to achieve a self-sharpening effect.

Optionally, the support platform 721 on the surface of one of the moveable knives 12 facing side of the fixed knife 11 be arranged. For example, the support platform 721 integral to the upper surface of the fixed knife 11 educated. The support platform 721 can also be on the surface of a fixed knife 11 facing side of the movable knife 12 be arranged. For example, the support platform 721 integral to the lower surface of the movable knife 12 educated.

Of course, the support platform can 721 also on the side wall of the positioning element 71 be trained. In particular, the upper end of the positioning element 71 a chuck 711 with a circular cross-section. The middle section of the positioning element 71 is designed as a vertically extending cylindrical shape. The sidewall of the central portion of the positioning element 71 is with a support platform 721 provided on the top surface of the fixed knife 11 or the lower surface of the movable knife 12 rests so that the back of the movable knife 12 raised and the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 is pressed.

The movable knife blade and the fixed knife blade 112 are usually made of a metallic material, e.g. B. made of a magnetic metal material. Therefore, in the in 16 illustrated example at least one biasing element a magnet 722 that between the fixed knife 11 and the movable knife 12 pinched and adjacent to the cutting edge of the movable knife 12 and / or the fixed knife 11 arranged so that the fixed knife 11 and the movable knife 12 by an attraction force between the magnet 722 , the fixed knife 11 and the movable knife 12 be tightened and the cutting edge of the movable knife 12 at the edge of the fixed knife 11 is attracted and pressed against it, reducing the friction between the movable knife 11 and the movable knife 12 is further increased to achieve a self-sharpening effect.

As in 17th shown, in some examples, one end of the positioning member protrudes 71 out of the sliding groove 121 and has a chuck 711 on whose outer dimension is greater than the width of the sliding groove 121 is. At least one prestressing element forms an elastic element 723 that is between the chuck 711 and the movable knife 12 is connected, which is why the elastic element 723 the preload force between the chuck 711 and the movable knife 12 can increase so that the cutting edge of the movable knife 12 against the cutting edge of the fixed knife 11 can be pressed and at the same time securing against loosening is achieved.

As in 18th shown, optionally forms the elastic element 723 a spring, the spring sleeve on the positioning element 71 is pushed and its upper end on the lower surface of the chuck 711 rests and the lower end thereof against the upper surface of the movable knife 12 which ensures simple structures and good pretensioning effect and protection against loosening. Of course, the elastic element 723 an elastic washer, an elastic membrane or the like, and the invention is not limited thereto.

As in 19th shown comprises the connecting element 70 according to another embodiment of the invention, a torsion spring 724 , wherein at least part of the torsion spring 724 is stationary and at least one other part of the torsion spring 724 with the movable knife 12 moved along. So when the movable knife 12 relative to the fixed knife 11 moved back and forth, at least part of the torsion spring moves 724 relative to part of the torsion spring 724 , creating a biasing force around the movable knife 12 against the fixed knife 11 to press, whereby the friction between the cutting edge of the movable knife and the cutting edge of the fixed knife is increased.

In some examples the torsion spring is 724 on the blade of the fixed knife 11 attached and the cutting edge of the fixed knife 11 arranged facing away. The two ends of the torsion spring 724 are each with the movable knife 12 connected to the movable knife 12 to push down, reducing the friction between the cutting edge of the movable knife 12 and the edge of the fixed knife 11 is increased when the movable knife 12 emotional.

Of course the torsion spring must 724 not necessarily on the fixed knife 11 be arranged and the torsion spring 724 can also be attached to a part other than a moving part (for example the moving knife 12 ) to be appropriate. As long as the torsion spring 724 the movable knife 12 against the fixed knife 11 can press, the corresponding technical solution falls under the scope of the present invention.

In some examples this is the fixed knife 11 with a limiting plate 113 provided over which the torsion spring 724 on the fixed knife 11 is attached. The boundary plate 113 comprises a longitudinal plate and a transverse plate. The lower end of the longitudinal plate is with the fixed knife 11 connected and one side of the transverse plate is connected to the upper end of the longitudinal plate, so that a limiting groove between the limiting plate 113 and the fixed knife 11 is defined. At least part of the torsion spring 724 is mounted in the limiting groove to prevent the torsion spring 724 springs upwards so that the movable knife 12 through the two ends of the torsion spring 724 against the fixed knife 11 is pressed down.

In some specific examples, the includes a fixed knife 11 a fixed knife holder 111 and a fixed knife blade 112 that are attached to the fixed knife holder 111 attached, the boundary plate 113 one piece with the fixed knife holder 111 is formed. By integrally molding the delimitation plate 113 on the fixed tool holder 111 the joining process can be simplified, molding can be facilitated, and production efficiency can be improved. By separately molding and then assembling the fixed knife holder 111 and the fixed knife blade 112 can the fixed knife blade 112 easily exchanged and costs can be reduced. Similarly, the structure of the movable knife 12 same as that of the fixed knife 11 and here there is no repetition.

It should be pointed out that the specific features, structures, materials or properties described can be combined with one another in a suitable manner within the scope of one or more exemplary embodiments or examples. For example, at least two of the components become support platforms 721 , Magnet 722 , elastic element 723 and torsion spring 724 combined with each other and on the fixed knife 11 and / or the movable knife 12 attached so that the movable knife 12 the fixed knife 11 better preload, thereby improving cutting efficiency, reducing the frequency of tool changes and reducing usage costs.

In one embodiment, as shown in 14th and 15th shown comprises the tool assembly 10 a fixed knife 11 , a movable knife 12 and two positioning elements 71 . The fixed knife 11 extends in the transverse direction (left-right direction in 14th ) and the movable knife 12 has two spaced slide grooves 121 on. Each of the sliding grooves 121 extends transversely and the movable knife 12 is above the fixed knife 11 arranged.

The top of the positioning element 71 has a chuck 711 with a cross-sectional area that is larger than the cross-sectional area of the intermediate portion. The two positioning elements 71 go through the corresponding sliding groove 121 through and position the movable knife 12 on the fixed knife 11 . When the movable knife 12 relative to the fixed knife 11 moved back and forth, the positioning element is located 71 always in the sliding groove 121 that can serve as a guide.

On the middle side wall of each of the positioning elements 71 are several support platforms 721 provided, which are spaced apart in the circumferential direction. The top of the support platform 721 lies on the lower surface of the movable knife 12 on and the lower end of the support platform 721 lies on the top surface of the fixed knife 11 at what the back of the movable knife 12 is raised and the back of the movable knife 12 spaced from the back of the fixed knife 11 is arranged. The cutting edge of the movable knife 12 becomes against the edge of the fixed knife 11 is pressed. That is, the movable knife 12 is bent and deformed, causing the fixed knife 11 pre-tensioned and with the moving knife moving 12 the friction between the cutting edge of the fixed knife 11 and the cutting edge of the movable knife 12 is increased, whereby a self-sharpening effect is achieved without frequent tool changes.

In one embodiment, as shown in FIG. 16, the tool assembly comprises 10 the lawnmower has a fixed knife 11 , a movable knife 12 , two positioning elements 71 and several magnets 722 . The fixed knife 11 extends in the transverse direction (left-right direction in 14th ) and the movable knife 12 has two spaced slide grooves 121 on. Each of the sliding grooves 121 extends transversely and the movable knife 12 is above the fixed knife 11 arranged.

The top of the positioning element 71 has a chuck 711 with a cross-sectional area that is larger than the cross-sectional area of the intermediate portion. The two positioning elements 71 go through the corresponding sliding groove 121 through and position the movable knife 12 on the fixed knife 11 . When the movable knife 12 relative to the fixed knife 11 moved back and forth, the positioning element is located 71 always in the sliding groove 121 that can serve as a guide.

The multiple magnets 722 are between the fixed knife 11 and the movable knife 12 arranged and each of the magnets 722 is adjacent to the cutting edge of the movable knife 12 arranged so that the movable knife 12 and the fixed knife 11 attract each other and thus the cutting edge of the movable knife 12 against the edge of the fixed knife 11 is pressed. When the movable knife 12 moves, the friction between the cutting edge of the fixed knife is created 11 and the cutting edge of the movable knife 12 increased, whereby a self-sharpening effect is achieved without frequent tool changes.

In one embodiment, as shown in 17th and 18th shown comprises the tool assembly 10 the lawnmower has a fixed knife 11 , a movable knife 12 , two positioning elements 71 and two elastic elements 723 . The fixed knife 11 extends in the transverse direction (left-right direction in 14th ) and the movable knife 12 has two spaced slide grooves 121 on. Each of the sliding grooves 121 extends transversely and the movable knife 12 is above the fixed knife 11 arranged.

The top of the positioning element 71 has a chuck 711 with a cross-sectional area that is larger than the cross-sectional area of the intermediate portion. The two positioning elements 71 go through the corresponding sliding groove 121 through and position the movable knife 12 on the fixed knife 11 . When the movable knife 12 relative to the fixed knife 11 moved to and fro, the positioning element is located 71 always in the sliding groove 121 that can serve as a guide. An elastic element 723 is between the chuck 711 each of the positioning elements 71 and the upper surface of the movable knife 12 provided to achieve a pretensioning and releasing effect, reducing the friction between the cutting edge of the fixed knife 11 and the cutting edge of the movable knife 12 is increased when the movable knife 12 moved, whereby a self-sharpening effect is achieved without frequent tool changes.

In one embodiment, as shown in FIG. 19, the tool assembly comprises 10 the lawnmower has a fixed knife 11 , a movable knife 12 , two positioning elements 71 and a torsion spring 724 .

The fixed knife 11 extends in the transverse direction (in the left-right direction in 14th ) and the fixed knife 11 is with a limiting plate 113 provided that the edge of the fixed knife 11 is turned away. The movable knife 12 has two spaced slide grooves 121 on and each of the sliding grooves 121 extends in the transverse direction. The movable knife 12 is above the fixed knife 11 arranged.

The top of the positioning element 71 has a chuck 711 with a cross-sectional area that is larger than the cross-sectional area of the intermediate portion. The two positioning elements 71 go through the corresponding sliding groove 121 through and position the movable knife 12 on the fixed knife 11 . When the movable knife 12 relative to the fixed knife 11 moved back and forth, the positioning element is located 71 always in the sliding groove 121 that can serve as a guide.

The torsion spring 724 is over the boundary plate 113 on the fixed knife 11 attached and both ends of the torsion spring 724 are with the movable knife 12 connected so that the movable knife 12 through the two ends of the torsion spring 724 down against the fixed knife 11 is pressed down, reducing the friction between the cutting edge of the fixed knife 11 and the cutting edge of the movable knife 12 increased and a self-sharpening effect is achieved without frequent tool changes.

At the lawn mower tool assembly 10 According to the embodiment of the present invention, the movable knife 12 against the fixed knife 11 be pressed so that at least part of the cutting edge of the movable knife 12 and the cutting edge of the fixed knife 11 rub against each other, whereby a self-sharpening effect can be achieved without human intervention and the sharpness of the cutting edge is maintained without changing the tool frequently, which ensures low operating costs.

As the lawn mower tool assembly 10 According to the embodiment of the invention has the above technical effect, the lawn mower according to the embodiment of the present invention also has the above technical effect. That is, the lawn mower has high cutting efficiency and does not need frequent tool changes, which ensures low running costs and good user experience.

In one embodiment, like 20th to 23 shown form the tool protection hood 25th , the tool arrangement 10 and the tool drive assembly 20th the tool device 2 . In this exemplary embodiment, the tool device comprises 2 furthermore an air blowing arrangement 50 .

The tool arrangement 10 is in the tool protection hood 25th arranged and from the inner wall surface of the tool guard 25th spaced. The tool drive assembly 20th is with the tool assembly 10 connected to the tool assembly 10 to drive to mow. The air blowing assembly 50 has an air duct 511 and an air inlet (not shown) and an air outlet 512 that with the air duct 511 connected to. The air outlet 512 is a gap between the tool assembly 10 and / or the tool arrangement 10 and the tool guard 25th facing.

When the lawnmower is working with a high density of grass, more grass chips are produced per unit of time, which easily move between the tool assembly 10 and the tool guard 25th pinched or on the tool protection hood 25th and the tool arrangement 10 be liable. By providing the air blowing assembly 50 can be the gap between the tool assembly 10 and / or between the tool assembly 10 and the tool guard 25th blown to keep grass chips in the gap between the tool assembly 10 and the tool guard 25th and grass chips on the tool assembly 10 and the tool guard 25th to blow away in time.

At the lawn mower tool assembly 2 According to the embodiment of the present invention, by providing the air blowing assembly 50 allows the tool assembly 10 and / or the gap between the tool assembly 10 and the tool guard 25th can be blown, thereby avoiding the problem that the grass due to the gap clogged by grass chips between the tool and the Tool protection hood 25th cannot be let in, which improves the cutting efficiency of the lawnmower and provides a better user experience.

In some optional examples, the air blowing assembly has 50 a separate drive unit, which means that the drive unit and the tool drive unit 20th are independent of each other, so that an air flow within the air duct 511 is generated to grass chips attached to the tool assembly 10 , on the tool protection hood 25th and in the gap between the tool assembly 10 and the tool guard 25th blow away.

In other optional examples, the air blowing assembly 50 through the tool drive assembly 20th driven to create a flow of air. That is, if the tool drive assembly 20th the tool arrangement 10 for mowing, the air blowing assembly 50 can be driven synchronously to generate a flow of air, which contributes to a reduced number of parts of the lawnmower and thus to reduced costs.

As in 22nd and 23 shown comprises the air blowing assembly 50 in some examples an air guiding element 51 and a rotating fan 52 . The air guiding element 51 has an air duct 511 and an air outlet 512 on. The fan 52 is with the air duct 51 connected and with the fan spinning 52 this serves to the air duct 511 Supply air to create an air flow. The fan can 52 with the tool drive assembly 20th be connected to under power from the tool drive assembly 20th to be rotated.

Optionally, the fan 52 in the air guiding element 51 be arranged what is called that the fan 52 in the air duct 511 is arranged so that outside air through the air inlet into the air duct 511 is introduced, with a high speed airflow under the action of the rapidly rotating fan 52 which is finally generated via the air outlet 512 from the air guide element 51 ejected and towards the tool assembly 10 and / or in the gap between the tool assembly 10 and the tool guard 25th is blown. Of course the fan can 52 outside of the air guiding element 51 be arranged and that of the fan 52 The high-speed airflow generated is through the air guiding element 51 to the tool assembly 10 guided.

Due to the good ventilation effect of the radial fan, it is particularly suitable for use in the area of air discharge or air supply for pipes. Therefore, the fan can 52 in some examples a radial fan 52 be, thereby facilitating that of the centrifugal fan 52 ejected air flow through the air guiding element 51 to the tool assembly 10 is directed.

As in 22nd shown is at least a portion of the air guiding element in some examples 51 as a curved tube pointing towards the tool assembly 10 is bent, formed. Specifically, one end of the air guiding element is 51 with the fan 52 connected and the other end of the air guide element 51 extends to above the tool assembly 10 so that of the fan 52 generated high velocity airflow to the tool assembly 10 is directed.

In some examples the air duct is 51 designed in the form of a spiral housing to work together with the fan 52 and the tool drive assembly 20th to form a scroll fan and the airflow generated by the scroll fan to the tool assembly 10 to direct.

In some specific examples is the drive arrangement 20th a motor comprising a motor housing and a motor body, wherein the fan 52 is connected to a motor shaft of the motor body and the air guide element 51 forms part of the motor housing.

When the tool drive assembly 20th works, the tool arrangement 10 are driven for mowing and at the same time displaced the motor shaft of the tool drive assembly 20th the fan 52 in rotation. The fast spinning fan 52 can not only accelerate the air flow around the motor body, thereby cooling the motor body and extending the life of the motor, but also the generated high-speed air flow to the tool assembly 10 and the gap between the tool assembly 10 and the tool guard 25th to lead. Thus, grass chips are left in the gap between the tool assembly 10 and the tool guard 25th and grass chips on the tool assembly 10 and the tool guard 25th blown away in time, which avoids the problem that the grass due to the gap between the tool and the tool protection hood clogged by grass chips 25th cannot be let in, which improves the cutting efficiency of the lawnmower.

The lawn mower according to the embodiment of the invention includes a lawn mower implement device 2 according to the above embodiment.

As the lawn mower tool device 2 according to the embodiment of the invention has the above technical effect, the lawn mower according to the embodiment of the present invention has Invention also have the above technical effect. That is, the lawn mower has a simple structure and grass chips in the gap between the tool guard 25th and the tool arrangement 10 and grass chips on the tool guard 25th and the tool arrangement 10 can be removed in a timely manner, which increases cutting efficiency and improves the user experience.

How out 24 to 33 results includes a lawn mower 1 according to an embodiment of the invention a device body 3 , two drive wheels 7th and a tool device 2 for mowing. The two drive wheels 7th are rotatable on the device body 3 and spaced apart in the transverse direction.

The tool device 2 is on the device body 3 arranged and includes a fixed knife 11 and a movable knife 12 , what movable knife 12 in the transverse direction relative to the fixed knife 11 reciprocated to achieve a cutting operation. Here is the ratio of the cutting width of the tool device 2 across the width of the lawnmower 1 in the transverse direction greater than or equal to 0.6.

By the lawnmower 1 According to the embodiment of the present invention, increasing the cutting width of the lawnmower 1 and thus the working efficiency of the lawnmower 1 improved by a tool device 2 with a fixed knife 11 and a floating movable knife 12 is used so that the cutting width of the tool device 2 in the transverse direction satisfies the above conditions. Hence the lawn mower 1 According to an embodiment of the present invention, the advantages of a compact arrangement of various components and a larger cutting width.

According to one embodiment of the invention, the cutting width of the tool device is 2 in the transverse direction greater than or equal to 25 cm. That is, when operating the lawn mower 1 a lawn with a width of greater than or equal to 25 cm can be cut at once, which provides increased efficiency. For example, the cutting width of the tool device 2 in the transverse direction are 25 cm, 28 cm, 30 cm, etc. and an adjustment to actual needs is possible.

In some optional examples, the cutting width is the tool device 2 in the transverse direction greater than or equal to 38 cm.

According to an embodiment of the invention, the lawn mower comprises 1 furthermore at least one support wheel 8th that is attached to the device body 3 attached to the center of gravity of the lawnmower 1 adjust.

When the lawn mower 1 works, he can through the two drive wheels 7th and at least one support wheel 8th be supported on the work surface, increasing the stability of the movement of the lawnmower 1 is ensured. Furthermore, by providing at least one support wheel 8th the mower's center of gravity 1 through the support wheel 8th adjusted so that the center of gravity of the lawnmower 1 between the drive wheel 7th and the support wheel 8th falls, increasing the stability of the lawnmower's movement 1 is further ensured.

The support wheel is optional 8th a swivel castor. By forming the support wheel 8th As a swivel castor, the position can be adjusted in real time depending on the direction of movement of the drive wheel 7th can be adjusted, which improves the operational flexibility of the lawnmower 1 which contributes to the quality and user experience of the lawn mower 1 be improved.

As in 24 to 29 As shown, in some optional examples the longitudinal direction extends in the front-rear direction in which the tool device 2 on the front area of the device body 3 arranged and the support wheel 8th behind the drive wheel 7th is arranged. By providing the support wheel 8th can using a jockey wheel 8th and two drive wheels 7th the lawnmower 1 be supported at at least three points, which increases the stability of the lawnmower 1 is ensured. At the same time is the tool device 2 on the front area of the device body 3 arranged and the support wheel 8th behind the drive wheel 7th arranged so that the center of gravity of the entire lawnmower 1 between the drive wheel 7th and the support wheel 8th can be adjusted, thereby increasing the stability of the tool device 2 and the balance of the entire lawnmower 1 be ensured.

How out 30th results, in other optional examples in the longitudinal direction is the tool device 2 in the middle of the device body 3 arranged and the support wheel 8th is in front of the tool device 2 positioned. By providing the support wheel 8th can using a jockey wheel 8th and two drive wheels 7th the lawnmower 1 be supported at at least three points, which increases the stability of the lawnmower 1 is ensured. At the same time is the tool device 2 on the central area of the device body 3 arranged and the support wheel 8th in front of the tool device 2 arranged so that the center of gravity of the entire lawnmower 1 between the drive wheel 7th and the support wheel 8th can be adjusted, thereby increasing the stability of the tool device 2 and the balance of the entire lawnmower 1 be ensured.

In some examples, the tool device is 2 in the transverse direction between two drive wheels 7th arranged, which ensures a neat arrangement of the individual parts and a compact structure. Specifically, the cutting direction is defined as the forward direction. When the lawn mower 1 Moving forward on a flat surface, the center of gravity of the entire lawnmower falls 1 at a rear point between the drive wheel 7th and the support wheel 8th . When the lawn mower 1 climbing a slope, the center of gravity of the entire lawnmower falls 1 at a rear point between the drive wheel 7th and the support wheel 8th . When the lawn mower 1 descending a slope, the mower's center of gravity falls 1 at a front location between the drive wheel 7th and the support wheel 8th .

As in 31 to 33 shown includes the lawn mower 1 in further optional examples also two guide wheels and two caterpillars 6 . The two guide wheels and the two drive wheels 7th are uniquely assigned in the longitudinal direction and the two caterpillars 6 are each around the associated drive wheels in the longitudinal direction 7th and guide wheels wound. That is, the drive wheel 7th , the guide wheel and the caterpillar 6 form a caterpillar movement structure, thus creating the contact surface between the lawnmower 1 and the work surface increases and the balance of the lawnmower 1 can be ensured.

As shown in FIG. 31, in some optional examples, the longitudinal direction extends in the front-rear direction in which the tool device 2 in front of the two caterpillars 6 is arranged.

As in 32 and 33 shown, in other optional examples the longitudinal direction extends in the front-rear direction in which the tool device 2 at the rear of the device body 3 and between the two caterpillars 6 is arranged.

According to an embodiment of the invention, the lawn mower comprises 1 also at least one auxiliary wheel 9 on the tool device 2 is arranged and relative to the device body 3 can move floating. By providing the auxiliary wheel 9 on the cutting device 2 can the tool device 2 be supported to maintain the balance and stability of the tool device 2 ensuring the overall balance of the lawnmower 1 is ensured.

In some examples, the auxiliary wheel is located 9 in front of the fixed knife 11 and the movable knife 12 . Therefore, the auxiliary wheel 9 do not serve to guide, but also serve to support, which increases the quality of the lawnmower 1 and thus contributes to an improved user experience.

In some specific examples, the tool device comprises 2 also a tool protection hood 25th who have favourited the fixed knife 11 and the movable knife 12 covers and floating movable on the front of the device body 3 is arranged. The auxiliary wheel 9 is on the tool protection hood 25th arranged. In other words, the tool device comprises 2 a fixed knife 11 , a movable knife 12 and a tool cover 25th . By providing the tool protection hood 25th can not only use the fixed knife 11 and the movable knife 12 protected, but also users and animals are protected from damage by the blade.

The auxiliary wheel is optional 9 a swivel castor. By forming the auxiliary wheel 9 as a swivel castor can not only change the position in real time depending on the operating environment of the lawnmower 1 can be adjusted, which improves the operational flexibility of the lawnmower 1 but also the damage to the lawn by the tool device 2 avoided, thereby reducing the quality and user experience of the lawnmower 1 be improved.

According to one embodiment of the invention, the height of the drive wheel corresponds 7th approximately the height of the lawnmower 1 . Based on a certain overall lawnmower size 1 has the drive wheel 7th a large size relative to the overall size of the lawnmower 1 , with which the running stability and balance of the lawnmower 1 can be increased. With a certain size of the drive wheel 7th The operation is more flexible and stable when the overall size of the lawn mower 1 is smaller.

The cutting sizes of the lawnmower are optional 1 380 mm long and 250 mm wide and the drive wheel 7th has a diameter of 200 mm. When the tool device 2 of the lawnmower 1 on the front of the device body 3 is arranged, the length is 490 mm and the width 380 mm. When the tool device 2 of the lawnmower 1 no tool protection hood 25th has, the length is 430 mm and the width 380 mm. When the tool device 2 of the lawnmower 1 in the middle of the device body 3 is arranged, the length is 450 mm and the width 380 mm. When the tool device 2 of the crawler mower on the front of the implement body 3 is arranged and the tool device 2 no tool protection hood 25th has, the Length 400 mm and width 380 mm. When the tool device 2 of the crawler mower at the rear of the implement body 3 is arranged and the tool device 2 no tool protection hood 25th the length is 350 mm and the width 380 mm.

In one embodiment, like the 24 and 25th shown includes the lawn mower 1 a device body 3 , two drive wheels 7th , a support wheel 8th , two auxiliary wheels 9 , a tool device 2 and a drive device 4th . Both the support wheel 8th as well as the auxiliary wheel 9 are swivel castors.

The two drive wheels 7th are spaced apart in the transverse direction on the device body 3 arranged and the drive device 4th is on the device body 3 arranged and with the drive wheel 7th connected to the drive wheel 7th to rotate, making the lawn mower 1 is driven to move. A support wheel 8th is on the device body 3 and behind the two drive wheels 7th arranged to serve for support.

The tool device 2 is on the front of the device body 3 arranged and can be relative to the device body 3 move floating. The tool device 2 includes a fixed knife 11 , a movable knife 12 , a tool protection hood 25th and a tool drive assembly 20th . The tool protection hood 25th is on the fixed knife 11 , the movable knife 12 and the tool drive assembly 20th arranged to the fixed knife 11 and the movable knife 12 to protect and also to protect users and animals from damage by the blade.

The stationary knife also extends 11 in the transverse direction and the movable knife 12 extends transversely and is above the movable knife 12 arranged. The tool drive assembly 20th is with the movable knife 12 connected to the movable knife 12 to drive back and forth in the transverse direction so that the movable knife 12 relative to the fixed knife 11 to and fro and thus grass is cut. The two auxiliary wheels 9 are on the tool protection hood 25th and in front of the fixed knife 11 and the movable knife 12 arranged. When the tool device 2 relative to the device body 3 Moved floating, the two auxiliary wheels move 9 floating together with the tool protection hood 25th . Thus, in addition to achieving auxiliary support for the tool device 2 the position of the tool device 2 can be set in real time.

The ratio of the cutting width of the lawnmower 1 to the total width of the lawnmower 1 is greater than or equal to 0.6 and the total height of the lawnmower 1 corresponds roughly to the height of the drive wheel 7th when the tool device 2 does not rotate or move.

In one embodiment, like the 26th to 29 shown includes the lawn mower 1 a device body 3 , two drive wheels 7th , two training wheels 8th , a tool device 2 and a drive device 4th . Here is the support wheel 8th a swivel castor.

The two drive wheels 7th are spaced apart in the transverse direction on the device body 3 arranged and the drive device 4th is on the device body 3 arranged and with the drive wheel 7th connected to the drive wheel 7th to rotate, making the lawn mower 1 is driven to move. The two training wheels 8th are on the device body 3 and behind the two drive wheels 7th arranged to serve for support.

The tool device 2 is on the front of the device body 3 arranged and can be relative to the device body 3 move floating. The tool device 2 includes a fixed knife 11 , a movable knife 12 , a tool protection hood 25th and a tool drive assembly 20th . The tool protection hood 25th is on the fixed knife 11 , the movable knife 12 and the tool drive assembly 20th arranged to the fixed knife 11 and the movable knife 12 to protect and also to protect users and animals from damage by the blade.

The stationary knife also extends 11 in the transverse direction and the movable knife 12 extends transversely and is above the fixed knife 11 arranged. The tool drive assembly 20th is with the movable knife 12 connected to the movable knife 12 to drive back and forth in the transverse direction so that the movable knife 12 relative to the fixed knife 11 to and fro and thus grass is cut.

The ratio of the cutting width of the lawnmower 1 to the total width of the lawnmower 1 is greater than or equal to 0.6 and the total height of the lawnmower 1 corresponds roughly to the height of the drive wheel 7th when the tool device 2 does not rotate or move.

In one embodiment, as shown in 27 shown includes the lawn mower 1 a device body 3 , two drive wheels 7th , two training wheels 8th , a tool device 2 and a drive device 4th . Here is the support wheel 8th a swivel castor.

The two drive wheels 7th are transversely spaced from each other on the rear portion of the device body 3 arranged and the drive device 4th is on the device body 3 arranged and with the drive wheel 7th connected to the drive wheel 7th to rotate, making the lawn mower 1 is driven to move. The two training wheels 8th are transversely spaced from each other on the front portion of the device body 3 arranged. That is, the two training wheels 8th in front of the two drive wheels 7th are arranged and serve to guide and support.

The tool device 2 is in the middle of the device body 3 arranged. In other words, is the tool device 2 between the drive wheel 7th and the support wheel 8th arranged. The tool device 2 includes a fixed knife 11 , a movable knife 12 and a tool drive assembly 20th . The fixed knife 11 and the movable knife 12 are in the middle of the device body 3 so that the device body 3 the fixed knife 11 and the movable knife 12 protects and further protects users and animals from damage by the blade. The fixed knife 11 extends transversely and the movable knife 12 extends transversely and is above the movable knife 12 arranged. The tool drive assembly 20th is with the movable knife 12 connected to the movable knife 12 to drive back and forth in the transverse direction so that the movable knife 12 relative to the fixed knife 11 to and fro and thus grass is cut.

The ratio of the cutting width of the lawnmower 1 to the total width of the lawnmower 1 is greater than or equal to 0.6 and the total height of the lawnmower 1 corresponds roughly to the height of the drive wheel 7th when the tool device 2 does not rotate or move.

In one embodiment, as shown in 28 shown includes the lawn mower 1 a device body 3 , two drive wheels 7th , two guide wheels, two caterpillars 6 , a tool device 2 and a drive device 4th .

The two drive wheels 7th are uniquely assigned to the two guide wheels. The two caterpillars 6 are each around the corresponding drive wheel 7th and wound the guide wheel. The drive device 4th is on the device body 3 arranged and with the drive wheel 7th connected to the drive wheel 7th to rotate and thus the caterpillars 6 to propel to move, making the lawn mower 1 is driven to move.

The tool device 2 is on the front of the device body 3 arranged. The tool device 2 includes a fixed knife 11 , a movable knife 12 and a tool drive assembly 20th . The fixed knife 11 extends transversely and the movable knife 12 extends transversely and is above the movable knife 12 arranged. The tool drive assembly 20th is with the movable knife 12 connected to the movable knife 12 to drive back and forth in the transverse direction so that the movable knife 12 relative to the fixed knife 11 to and fro and thus grass is cut.

The ratio of the cutting width of the lawnmower 1 to the total width of the lawnmower 1 is greater than or equal to 0.6 and the total height of the lawnmower 1 corresponds roughly to the height of the drive wheel 7th when the tool device 2 does not rotate or move.

In one embodiment, as shown in 29 and 30th shown includes the lawn mower 1 a device body 3 , two drive wheels 7th , two guide wheels, two caterpillars 6 , a tool device 2 and a drive device 4th .

The two drive wheels 7th are uniquely assigned to the two guide wheels. The two caterpillars 6 are each around the corresponding drive wheel 7th and wound the guide wheel. The drive device 4th is on the device body 3 arranged and with the drive wheel 7th connected to the drive wheel 7th to rotate and thus the caterpillars 6 to propel to move, making the lawn mower 1 is driven to move.

The tool device 2 is at the rear of the device body 3 and between the two caterpillars 6 arranged. The tool device 2 includes a fixed knife 11 , a movable knife 12 and a tool drive assembly 20th . The fixed knife 11 extends transversely and the movable knife 12 extends transversely and is above the movable knife 12 arranged. The tool drive assembly 20th is with the movable knife 12 connected to the movable knife 12 to drive back and forth in the transverse direction so that the movable knife 12 relative to the fixed knife 11 to and fro and thus grass is cut.

The ratio of the cutting width of the lawnmower 1 to the total width of the lawnmower 1 is greater than or equal to 0.6 and the total height of the lawnmower 1 corresponds roughly to the height of the drive wheel 7th when the tool device 2 does not rotate or move.

According to an embodiment of the invention, as in 31 to 35 shown includes the lawn mower 1 a device body 3 , a movement device 5 and a tool device 2 .

The movement device 5 is on the device body 3 arranged and the tool device 2 is on the front of the device body 3 arranged. The tool device 2 can be relative to the device body 3 hover depending on the frontal terrain to cross an obstacle or climb a slope.

By the lawnmower 1 of the embodiment of the invention is the tool device 2 on the front of the device body 3 arranged so that the corner position is cut better and the cutting result is improved. The tool device 2 can be relative to the device body 3 move according to the front terrain, whereby obstacles or gradients are overcome and thus the adaptability of the lawnmower 1 on complex terrain is improved.

According to one embodiment of the invention, the tool device 2 use a reciprocating cutting tool to make cutting safer and increase the cutting width.

According to one embodiment of the invention, the tool device 2 pivotable with the device body 3 connected, and the tool device 2 can be relative to the device body 3 Pivot in front of it according to the terrain, which means that obstacles or inclines can be overcome and the lawnmower's adaptability 1 on complex terrain is improved.

According to an embodiment of the invention, the lawn mower comprises 1 also a levitation connection arrangement, each with device body 3 and the tool device 2 connected so that the tool device 2 relative to the device body 3 can move floating.

A part of the levitation connection arrangement with the device body is concrete 3 connected and another part of the levitation link assembly is to the tooling device 2 connected. The floating connection arrangement is device body relative to at least one of the components 3 and tool device 2 movable. When the lawn mower 1 When mowing, it encounters an obstacle or a slope, the tool device can 2 relative to the device body 3 move while floating to cross an obstacle and climb a slope.

How out 31 to 33 As can be seen, in some optional examples, the levitation link assembly includes a rotatable link shaft 63 over which the tool device 2 pivotable with the device body 3 connected is. The tool device 2 can be relative to the device body 3 Pivot in front of it according to the terrain, which means that obstacles or inclines can be overcome and the lawnmower's adaptability 1 on complex terrain is improved. The connecting shaft 63 anywhere in the main body 10 be arranged and can, for example, about the axial direction of the movement device 5 to be turned around.

In other optional examples, the levitation link assembly is a tie rod mechanism. For example, the levitation link assembly can be a tie rod mechanism 61 be.

As in 34 shown comprises the four-bar mechanism 61 a first connecting rod to a fourth connecting rod. The first connecting rod is on the device body 3 attached. The fourth connecting rod is on the tool device 2 attached. The two ends of the second connecting rod are rotatably connected to one end of the first connecting rod and one end of the fourth connecting rod, respectively. The two ends of the third connecting rod are each rotatably connected to the other end of the first connecting rod and the other end of the fourth connecting rod. When the four-bar mechanism 61 moves, the tool device can move 2 relative to the device body 3 move, thereby crossing an obstacle and climbing a slope.

How out 35 As can be seen, in other optional examples, the levitation link assembly includes a bracket and moveable push rod 621 . The bracket is on one of the device body components 3 and the tool device 2 arranged. One end of the push rod 621 is connected to the bracket and the other end to the push rod 621 is device body with the other of the components 3 and tool device 2 connected. Thus, the push rod 621 be moved relative to the holder, whereby the tool device 2 relative to the device body 3 is moved.

According to another embodiment of the invention, the tool device comprises 2 a tool protection hood 25th that come with the device body 3 connected via the floating connection arrangement and relative to the device body 3 can move floating, one Tool arrangement 10 and a tool drive assembly 20th . The tool drive assembly 20th serves to drive the tool assembly 10 for mowing. The tool arrangement 10 is in the tool protection hood 25th built-in.

In some examples is the height of the tool assembly 10 inside the tool protection hood 25th adjustable. That is, the height of the tool assembly 10 in the tool protection hood 25th Depending on the requirements, different cutting heights can be set to cut grass with different cutting heights.

In some examples, the lower area is the front of the tool guard 25th connected with a circular arc transition at the front edge of the bottom. By removing the surface of the tool guard 25th has a smooth arch shape, can be used in terrain changes for the lawnmower 1 the tool protection hood 25th contact the changing terrain as quickly as possible to cause a turn without damaging the terrain.

As in 31 shown, in some specific examples, the front side surface of the tool protection hood extends 25th from top to bottom in the vertical direction gradually backwards, so that a guide surface on the front of the tool guard 25th is trained. When the lawn mower 1 encounters an obstacle or an incline while mowing, the implement 2 automatically through the guide surface on the front of the tool protection hood 25th be raised in the obstacle or slope direction, whereby the obstacle is crossed without a separate drive device is required to drive the tool device to rotate.

According to a further embodiment of the invention, the lawn mower comprises 1 also an obstacle-negotiating drive assembly 40 . The obstacle-negotiating drive assembly 40 is on the device body 3 arranged. Of course, the obstacle negotiating drive arrangement 40 also on the tool device 2 (e.g. on the tool protection hood 25th ) be arranged.

It is the obstacle-negotiating drive arrangement 40 connected to the levitation link assembly. The “connection” can be both a direct connection and an indirect connection made via an intermediate piece. Thus, the tool device 2 (e.g. the tool protection hood 25th ) for moving relative to the device body 3 driven so that the lawn mower 1 can cross an obstacle or climb a slope depending on the terrain.

In some examples, the lawnmower includes 1 furthermore a gear mechanism 60 that drives with the obstacle-negotiating drive assembly 40 or the levitation connection arrangement is connected, so that the obstacle-negotiating drive arrangement 40 the levitation link assembly for operation (e.g. movement of the four-bar mechanism 61 , the movement of the push rod 621 or the rotation of the connecting shaft 63 ) can drive so that the tool device 2 relative to the device body 3 can move in order to overcome an obstacle or climb a slope.

In some optional examples, the transmission mechanism 60 one of the mechanisms of belt drive mechanism, gear drive mechanism and worm gear mechanism or a combination of at least two gear mechanisms 60 be of it.

In the in 32 example shown is the connecting shaft 63 directly from the obstacle-negotiating drive unit 40 driven and a power output shaft of the obstacle-negotiating drive unit 40 is detachable with the connecting shaft 63 connected. For example, the power output shaft of the obstacle-negotiating drive unit stands 40 for easy assembly and replacement in threaded connection with the connecting shaft 63 .

According to another embodiment of the invention, the lawn mower comprises 1 also a terrain detection sensor (not shown) and a control module (not shown). The terrain detection sensor can be used to detect whether there are obstacles in the front terrain or whether a slope is to be climbed. The control module is in communication with the terrain detection sensor or the obstacle-negotiating drive arrangement 40 so that the operation of the obstacle negotiating drive assembly 40 can be controlled as a function of the state of the terrain in front of it, which is detected by the terrain detection sensor.

According to another embodiment of the invention, the levitation connection arrangement is an electric push rod 62 attached to one of the device body components 3 and tool device 2 is appropriate. The force output end of the electric push rod 62 (namely, one end of the push rod) is device body with the other of the components 3 and tool device 2 connected. When the electric push rod 62 works, the tool device can 2 driven to move relative to the device body 3 to move, whereby an obstacle is overcome and a slope is climbed.

In some examples, the movement device 5 two drive wheels 7th be arranged opposite one another, the drive wheel 7th allows movement by turning while the tool guard 25th Can be supported on the floor, thereby ensuring stable operation of the lawn mower 1 is ensured.

In some optional examples, the moving device includes 5 also at least one auxiliary wheel 9 for balancing.

Other optional examples are in the lawn mower 1 A gyroscope and an accelerometer (not shown) are incorporated to balance the lawnmower in real time according to the operating status of the lawnmower 1 and thus ensure stable operation.

In other examples, the movement device 5 be a caterpillar-like movement device and the tool guard 25th can float relative to the floor, causing damage to the terrain through the bottom of the tool guard 25th is avoided.

According to an embodiment of the invention, as in 31 shown includes the lawn mower 1 a device body 3 , a movement device 5 , a tool device 2 , an obstacle negotiation drive assembly 40 , a gear mechanism 60 , a terrain detection sensor (not shown) and a control module (not shown).

The drive device 5 is on the device body 3 arranged. The drive device 5 includes two opposing drive wheels 7th . The tool device 2 is on the front of the device body 3 arranged and the tool device 2 includes a tool protection hood 25th , a tool assembly 10 and a tool drive assembly 20th . The tool protection hood 25th is about the connecting shaft 63 pivotable with the device body 3 connected. The surface of the front of the knife guard 25th gradually extends backwards from top to bottom to form an arch. The tool arrangement 10 and the tool drive assembly 20th are located on the front of the tool protection hood 25th and near the edge of the sheet. The tool drive assembly 20th serves to drive the tool assembly 10 for mowing. The tool arrangement 10 is a reciprocating cutting tool.

Here is the gear mechanism 60 is a belt transmission mechanism that is each drivingly associated with the obstacle negotiation drive assembly 40 and the connecting shaft 63 connected.

In the in 31 example shown can be the lawn mower 1 the floor with the two drive wheels 7th via the tool device 2 touch, thereby maintaining balance.

In other examples, the moving device includes 5 also at least one auxiliary wheel 9 thereby reaching at least three support points to balance the lawnmower 1 to ensure.

In other examples, the lawnmower is 1 equipped with a gyroscope and an accelerometer inside. When the lawn mower is working, there are only two drive wheels 7th in contact with the floor. The gyroscope and accelerometer can balance the lawnmower in real time according to the lawnmower's operating condition 1 adjust to ensure stable operation.

When the lawn mower 1 is working, the terrain detection sensor (e.g. ultrasound and image detection) detects the front terrain and can furthermore control the terrain, for example by changing the current of the tool drive arrangement 20th when pushing the tool device 2 recognize the terrain. If there is an obstacle, the tool protection hood 25th raised in the direction of the obstacle, thereby overcoming the obstacle. In the event of a slope, the tool guard moves 25th floating autonomously towards the slope, making the movement device 5 climbs the slope.

In other examples, if the terrain detection sensor detects that the leading terrain is an obstacle or slope, a signal may be transmitted to the control module, causing the control module to initiate the obstacle negotiation drive assembly 40 causes. That is, the obstacle-negotiating drive assembly 40 the gear mechanism 60 for the transmission of motion drives to the tool guard 25th to put in rotation and the tool device 2 raise so the lawn mower 1 crosses the obstacle or climbs the slope.

In one embodiment, as shown in 32 shown is the connecting shaft 63 directly from the obstacle negotiation drive assembly 40 driven, whose power output shaft is detachable with the connecting shaft 63 connected is. The other components are the same as in the above embodiments.

The lawn mower overcomes during operation 1 an obstacle or climb a slope under direct propulsion from the obstacle negotiation drive assembly 40 .

In one embodiment, as shown in 33 shown is the lawnmower 1 moved by a caterpillar drive and the tool guard 25th does not have to touch the floor, which improves safety performance and reduces resistance during movement.

In one embodiment, as shown in 34 shown is the tooling device 2 via a four-bar mechanism 61 with the device body 3 connected. Specifically, there are the two opposing connecting rods of the four-bar mechanism 61 each on the tool protection hood 25th the tool device 2 or the device body 3 attached and the other two opposing connecting rods of the four-bar mechanism 61 are each rotatably connected to the above two connecting rods. If there is an obstacle or a slope in front, the four-bar mechanism begins 61 to work and drives the tool guard for floating movement upwards 25, whereby the tool device 2 is raised so that the lawn mower 1 crosses the obstacle or climbs the slope.

The drive device comprises 5 two opposite drive wheels 7th and an auxiliary wheel 9 that is attached to the rear of the device body 3 is arranged, thereby increasing the stability of the operation of the lawn mower 1 is ensured.

In one embodiment, as shown in 35 shown is on the device body 3 an electric push rod 62 provided and a power output end of the electric push rod 62 is with the tool protection hood 25th the tool device 2 connected. If there is an obstacle or a slope in front, the power output end of the electric push rod protrudes 62 addition, making the tool guard 25th is pushed up in relation to the ground so that the lawn mower 1 crosses the obstacle or climbs the slope.

Claims (11)

A lawnmower comprising: an implement body, a tool drive assembly comprising a cutting motor mounted on the implement body, a tool assembly mounted on the implement body and driven by the cutting motor, the tool assembly having a first cutting element and a second Comprising cutting elements which reciprocate relative to one another to mow grass, characterized in that the lawn mower comprises a locking mechanism by which the tool assembly is removably mounted on the implement body. Lawn mower after Claim 1 , characterized in that the locking mechanism comprises a base cover attached to the device body such that at least a portion of the tool assembly is clamped between the base cover and the device body. Lawn mower after Claim 2 , characterized in that the locking mechanism comprises a locking element which is arranged on the device body and / or the base cover, wherein the locking element can be moved between a locking position and an unlocking position, wherein in the locking position the base cover is connected to the device body and in the Unlocking position the base cover is separated from the device body. Lawn mower after Claim 3 , characterized in that the locking element comprises a buckle for connecting the base cover to the device body. Lawn mower after Claim 1 , characterized in that the locking mechanism comprises a threaded connection arrangement via which the tool assembly is attached to the tool body. Lawn mower after Claim 1 , characterized in that the tool drive assembly includes a rotary gear member connected to the cutting motor and driven by the cutting motor, the tool assembly including a connecting gear member coupled to the rotary gear member in coordination therewith so that the cutting motor drives the tool assembly. Lawn mower after Claim 6 , characterized in that the rotary gear element comprises at least one projection and the connecting gear element comprises an indentation, which indentation receives the at least one projection. Lawn mower after Claim 1 , characterized in that the first cutting element comprises a first tool holder and a first knife which is driven by the tool drive arrangement and is detachably connected to the first tool holder via a connecting element. Lawn mower after Claim 8 , characterized in that the connecting element comprises a fixed connecting element or a movable connecting element. Lawn mower after Claim 9 , characterized in that the movable connecting element comprises a first gear element and a second gear element, wherein the first gear element comprises a first end and a second end which are arranged opposite one another and are each movably connected to the first knife and the second cutting element, respectively the second gear element is movably connected to the first gear element and is driven by the cutting motor to reciprocate the first knife relative to the second cutting element. Lawn mower after Claim 1 , characterized in that the tool arrangement comprises a prestressing element which is arranged in at least one of the components of the first cutting element and second cutting element, so that at least a part of the first cutting element presses the second cutting element in place.

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