DE202018000417U1 - mowing machine - Google Patents

Abstract

A lawnmower comprising a machine body (2) having at least one motor unit (12) and an operating unit (11) with which at least the direction and speed of the lawnmower (1) can be controlled, characterized in that the operating unit (11) has at least one joystick (14), the lawnmower comprises a mower deck (5), the operating unit (11) is configured to control the function of the mowing deck (5), the mower deck (5) comprises a plurality of mowing devices (38) each having a dome (40), a knife (41) and a shaft (42) which rotates about a respective axis and carries the knife (41) have, the mower (5) comprises a housing (37) which is formed, a seat (39) is defined in which the mowing devices (38) are housed, the housing (37) is provided with a lid (49) designed to close off the seat (39).

Description

USING THE PRIORITY

This application takes the priority of Italian Patent Application No. 102017000007885 filed January 25, 2017, the content of which is hereby incorporated by reference.

The present invention relates to a lawnmower.

In particular, the present invention relates to a lawnmower with a cab in which the driver sits during operation. These mowers are commonly referred to in the industry as "riding mowers".

The present invention is intended to improve the performance and maneuverability of prior art lawn mowers. Increasingly, there has been a need to minimize mowing times, optimize results and at the same time simplify maneuverability of the lawnmower, even under specific working conditions (limited maneuvering areas, uneven terrain, terrain with numerous obstacles to avoid) etc.).

In accordance with these objectives, the present invention relates to a lawnmower having a machine body with at least one engine and operating unit to control at least the direction and speed of the lawnmower; the control unit comprises at least one joystick.

The joystick optimizes and simplifies the maneuverability of the lawnmower.

The maneuverability of the lawn mower is actually better than lawnmowers with steering wheel. The joystick allows for greater freedom of impact and to the extent that the lawnmower can turn around itself.

In addition, the driver's view of the terrain to be mowed is improved by eliminating the steering wheel and the corresponding handlebar.

• - 1 eine perspektivische schematische Ansicht des erfindungsgemäßen Rasenmähers;
• - 2 eine schematische Blockdarstellung eines ersten Details des erfindungsgemäßen Rasenmähers aus 1;
• - 3 eine perspektivische schematische Ansicht mit der Deutlichkeit halber entfernten Bauteilen eines zweiten Details des Rasenmähers aus 1;
• - 4 eine perspektivische schematische Ansicht von unten mit der Deutlichkeit halber entfernten Bauteilen eines dritten Details des Rasenmähers aus 1;
• - 5 eine perspektivische schematische Ansicht mit der Deutlichkeit halber entfernten Bauteilen eines vierten Details des Rasenmähers aus 1;
• - 6 eine schematische Seitenansicht mit durchsichtigen Bauteilen und der Deutlichkeit halber entfernten Bauteilen des Details aus 5 in einer ersten Arbeitsposition;
• - 7 eine schematische Seitenansicht mit durchsichtigen Bauteilen und der Deutlichkeit halber entfernten Bauteilen des Details aus 5 in einer zweiten Arbeitsposition.

Other features and advantages of the present invention will become clearly apparent from the following description of a non-limiting example with reference to the figures of the accompanying drawings. Show it:

• - 1 a perspective schematic view of the lawn mower according to the invention;
• - 2 a schematic block diagram of a first detail of the lawnmower according to the invention from 1 ;
• - 3 a perspective schematic view with the clarity of removed components of a second detail of the lawnmower from 1 ;
• - 4 a perspective schematic view from below with the clarity of removed components of a third detail of the lawnmower from 1 ;
• - 5 a perspective schematic view with the clarity of removed components of a fourth detail of the lawnmower from 1 ;
• - 6 a schematic side view with transparent components and the sake of clarity removed components of the detail 5 in a first working position;
• - 7 a schematic side view with transparent components and the sake of clarity removed components of the detail 5 in a second working position.

In 1 is with reference number 1 a lawnmower called.

The lawnmower 1 includes a machine body 2 a wheel unit 3 with at least two drive wheels 4 , a mower 5 and a main frame 7 who with the wheel unit 3 connected and configured to the machine body 2 and the mower 5 to wear.

The machine body 2 includes a cab 9 with a seat 10 , a control unit 11 near the driver's cab 9 and a motor unit 12 behind the seat 10 of the driver's cab 9 with at least one engine 13 ,

In the non-limiting example described and illustrated herein, the operating unit is 11 configured to the speed and direction of the mower 1 and the function of the mower 5 to regulate.

In detail, the operating unit comprises 11 at least one joystick 14 ,

In particular, the joystick includes 14 a pedestal 15 and a lever 16 , with the pedestal 15 connected via a ball joint. In this way, the lever can 16 rotate around at least two mutually perpendicular axes.

Preferably, the joystick controls 14 at least the speed and direction of the lawnmower 1 ,

By the movement of the lever 16 the driver controls the direction and speed of the lawnmower 1 as shown below.

The lever 16 is preferably with one or more (in the attached 1 not clearly visible) controls that are configured to make other adjustments (for example, mower deck regulation 5 , Unlocking security functions, etc.).

A variant provides that some controls on the pedestal 15 or near the driver's cab 9 are arranged.

The controls can be designed as touch or touch buttons, dials, levers, and so on.

Another variant provides that the operating unit 11 also has a display on which the information and data can be displayed on the settings made (for example, speed of the lawnmower 1 , Operating conditions of the mower 5 etc.).

The behind the seat 10 of the cab 9 arranged motor unit 12 includes - as stated before - at least one engine 13 , a (in 2 to see) first transmission 17 and a second one (in 3 to see) transmission 18 and a (in 2 to be seen) control unit 19 ,

The motor 13 is preferably an internal combustion engine, preferably an internal combustion engine.

A variant, not shown, provides that the motor unit comprises one or more electric motors.

The motor 13 is about the first gearbox 17 with the drive wheels 4 the wheel unit 3 and about the second gearbox 18 with the mower 5 coupled.

Referring to 2 is the first gearbox 17 Preferably, a hydraulic transmission and includes a hydraulic main pump 20 , a secondary valve unit 21 and an oil container 22 ,

The hydraulic main pump 20 is from the (in 2 not shown) engine 13 driven and supplied via corresponding independent supply lines, the secondary valve unit 21 , a right engine 24 who associated with the (in 2 shown schematically) right drive wheel 4 coupled, and a left engine 25 who associated with the (in 2 shown schematically) left drive wheel 4 is coupled.

The right engine 24 and the left engine 25 are hydraulic motors.

The hydraulic main pump 20 leads via a support line 26 , preferably with a heat exchanger 27 equipped, oil to the oil reservoir 22 and receives via a return line 28 , preferably with an oil filter 29 equipped, oil from the oil reservoir 22 ,

Thanks to the presence of two independent supply lines between the hydraulic main pump 20 and right engine 24 and left engine 25 can reduce the speed of the drive wheels 4 be regulated independently of each other.

The secondary valve unit 21 is essentially defined by a plurality of solenoid valves which distribute the incoming oil from the various consumers connected thereto under pressure.

In particular, the secondary valve unit 21 configured to from the hydraulic main pump 20 pressurized oil selectively into a brake circuit 30 with a right brake 31 for the right drive wheel 4 and a left brake 32 for the left drive wheel 4 to promote.

The secondary valve unit 21 is also configured to from the main hydraulic pump 20 pressurized oil selectively to a reciprocating piston 35 an adjustment device 36 of the main frame 7 (in the 5 - 7 to see what will be discussed in more detail below. The secondary valve unit 21 is also configured to move from the piston 35 selectively pick up incoming oil.

The excess, from the main hydraulic pump 20 to the secondary valve unit 21 subsidized oil is directed into the oil reservoir 22.

The control unit 19 is configured to the main hydraulic pump 20 and the secondary valve unit 21 on the basis of the driver on the control unit 11 to regulate given commands. In particular, the control unit translates 19 the incoming commands into control signals for the control of the hydraulic main pump 20 and the secondary valve unit 21 ,

In detail, the control device translates the incoming commands into control signals, with which corresponding solenoid valves (not shown) running along the supply lines of the right Motors 24 and the left engine 25 are arranged to be regulated. In essence, the speed and direction of the lawnmower 1 fixed by adding more or less oil to the right 24 and left motor 25 is encouraged.

As already said in part, the movement of the lever leads 16 of the joystick 14 forward to an increase in the speed of the lawnmower 1 ,

The working stroke of the lever 16 of the joystick 14 is divided to accelerate from zero speed to maximum speed.

The control unit 19 is preferably configured to limit the maximum speed to a driver-settable value - for example via a control wheel of the control unit 11 ,

Referring to 1 and 5 includes the wheel unit 3 preferably three wheels, two of which are from the corresponding engines 24 and 25 driven drive wheels 4 are the third and a steering role 35 is.

Preferably, the drive wheels are located 4 behind and the steering wheel 35 front.

Advantageously, the three-wheeled structure allows better maneuverability and facilitates mowing around obstacles (for example, beds, trees, etc.) and in corners.

The three-wheel design, in combination with the joystick operation, enables quick and easy maneuvering of the lawnmower 1 and also improves the mowing quality.

The mower 5 is preferably under the cab 9 arranged and includes a housing 37 and at least one (only in 4 to see) mower 38 that with the case 37 connected is.

In the here described and in 4 The non-limiting example shown includes the mower deck 5 three mowers 38 ,

The housing 37 has essentially the shape of a dome, so a seat 39 is defined in which the mowing devices 38 are housed.

In the non-limiting example described and illustrated herein are the mowing devices 38 essentially identical.

Preferably, there are two mowing devices 38a 38b identical and also in terms of size, while a mowing device 38c compared to the other two mowers 38a 38b is a little smaller.

Every mowing device 38 includes a dome 40 , a knife 41 and a shaft 42 which rotates about a respective axis A.

The dome 40 defines a seat 43 in that with the shaft 42 coupled knives 41 is housed. The dome 40 has a through hole 44 which is essentially centrally located and in which the shaft 42 sitting.

The knife 41 turns inside the seat 43 , Preferably, with the knife is also a propeller 45 coupled.

The knife 41 and the calotte 40 are designed so that due to the rotation of the knife 41 Whirls are generated which cut the crop into the upper part of the calotte 40 spin, so that the crop is centrifuged, which promotes its drying. The generation of the vortex is due to the use of the propeller 45 even more effective.

The simultaneous cutting action of the knife 41 causes the crop to be shredded.

Advantageously, the combined effect of comminution and centrifugation dispenses with crop gathering systems, with obvious advantages in terms of comfort, size and time. Thanks to the special construction of the mowing device 38 the crop loses most of its volume and it is essentially pulverized into very small parts which are absorbed by the soil in a very short time and at the same time contribute to the fertilization of the lawn or the meadow. For example, the knife 41 and the calotte 40 from in patent EP 1474963 be described type.

Preferably, the mowers sit 38 so in the seat 39 of the housing 37 in that the mowing areas partially overlap so that the cut of each mowing device 38 optimized and overall a uniform lawn cut is achieved.

Preferably, the waves 42 arranged at the tips of a preferably isosceles triangle.

Every wave 42 is from the second gearbox 18 driven.

Advantageously, the second (in 3 to see) transmission 18 almost completely in the seat 39 of the housing 37 and the case 37 is with a lid 49 locked, which is designed to fit the seat 39 completes and thereby prevents that cuts and other undesirable things (dust, dirt, small animals, etc.) impede the transmission of motion. Furthermore, by the lid 49 reduces noise generated during lawn mower operation significantly. The lid 49 actually prevents the case 37 can act as a sound box.

Referring to 3 includes the second gear 18 a main belt 45, three secondary belts 46 and a deflection shaft 47 ,

The main belt 45 is with a pulley 50 connected to the (not shown) shaft of the motor 12 coupled, as well as with a first Umlenkriemenscheibe 51 connected to the deflection shaft 47 coupled, connected.

• - Ein Nebenriemen 46c ist mit einer zweiten Umlenkriemenscheibe 52 gekoppelt, die mit der Umlenkwelle 47 gekoppelt ist, und mit einer Riemenscheibe 53c, die fest mit der Welle 42c der Mähvorrichtung 38c verbunden ist; die Riemenscheibe 53c ist besitzt drei unabhängige Nuten für die Aufnahme von drei entsprechenden Riemen.
• - Ein Nebenriemen 46a ist mit der Riemenscheibe 53c und einer Riemenscheibe 53a, die fest mit der Welle 42a der Mähvorrichtung 38a verbunden ist, gekoppelt.
• - Ein Nebenriemen 46b ist mit der Riemenscheibe 53c und einer Riemenscheibe 53b, die fest mit der Welle 42b der Mähvorrichtung 38b verbunden ist, gekoppelt.

The three secondary belts 46 are arranged as follows:

• - A secondary belt 46c is with a second deflection pulley 52 coupled with the deflection shaft 47 coupled, and with a pulley 53c that stuck with the shaft 42c the mower 38c connected is; the pulley 53c has three independent grooves for receiving three corresponding belts.
• - A secondary belt 46a is with the pulley 53c and a pulley 53a that stuck with the shaft 42a the mower 38a connected, coupled.
• - A secondary belt 46b is with the pulley 53c and a pulley 53b that stuck with the shaft 42b the mower 38b connected, coupled.

In essence, the main belt drives 45 due to the special construction of the gearbox 18 the pulley of one of the three mowers 38 (for example, the pulley 53c ) simultaneously with the secondary belts ( 46a 46b), which is also the other two mowing devices 38 drive.

Advantageously, the mower 5 and the second gearbox 18 designed so that damaged mowing devices 38 can be replaced without the function and structure of the other mowing devices 38 to impair.

In addition, the gear used 18 designed so that drive belts of the same size can be used. The mowers 38 and the diversion shaft 47 can actually be arranged so that the pulleys 50 - 51 . 52 - 53c . 53a - 53c . 53b - 53c have the same distance from each other. Preferably, the distance between the pulleys 50 - 51 . 52 - 53c , 53a-53c, 53b-53c are chosen so that standard length drive belts can be used, which are commercially available by default.

Preferably, the transmission comprises 18 also a holding plate 55 that is designed to fit the pulleys 53a or 53b or 53c can hold if the corresponding dome 40 is exchanged.

The holding plate 55 is on all calottes 40 attached and between the calottes 40 and the pulleys 53a 53b 53c arranged.

When replacing one of the calottes 40 holds the trained and arranged holding plate 55 the corresponding pulley 53 that with the corresponding shaft 42 is coupled.

Referring to 1 owns the main frame 7 a main supporting structure 58 substantially configured to define a supporting structure extending along a closed portion associated with the sprocket unit 3 is coupled and above the sprocket unit 3 is suspended.

In particular, the main bearing structure 58 a substantially central section 60 partly the same shape as the housing 37 of the mower 5 has and is shaped to fit the case 37 itself, a rear section 61 coupled to the drive wheels and configured to mower the lawnmower body, and more particularly the engine unit 12 be held, and a front section 62 , with the steering wheel 34 is coupled carries.

Preferably, the front portion 62 designed so that a kind of bumper is defined.

Preferably, the frame comprises 7 also a safety bar 64 designed to keep the driver from tipping over the lawnmower 1 is protected.

In the non-limiting example described and illustrated herein is the safety bar 64 at the front section 62 the main bearing structure 58 attached.

Referring to the 5 - 7 and as mentioned earlier, includes the lawnmower 1 a device 36 for adjusting the main frame 7 with a reciprocating piston 35 and a system 65 for transmitting the movement of the reciprocating piston 35 on the main frame 7 ,

This adjustment device 36 is essentially designed to be the main frame 7 between a first position ( 6 ), in which the mower 5 is set to a first height H1 above the ground, and a second position ( 7 ), in which the mower 5 is brought to a second height H2 above the first height H1, to adjust.

Preferably, the adjustment device 36 designed to be the main frame 7 to adjust so that the mowing unit can also be set to intermediate positions between the first and the second position to the distance of the mower 5 from the ground in a suitable manner.

In this way, the driver can adjust the height of the mower deck 5 adjust as desired.

In this way, the cutting height can be adjusted and the mower deck 5 from damage from ground contact while driving the lawnmower 1 be preserved. Preferably, the middle section 60 of the main frame 7 and the mower 5 firmly connected. Consequently, the movement of the mower determines 5 also the movement of the main frame 7 , In essence, the frame 7 and the mower 5 arranged at one and the same height above the ground.

The adjustment device 36 thus also regulates the height of the frame 7 ,

In this way, the danger is best avoided that the main frame 7 touches the ground when the lawnmower 1 is moved on particularly uneven terrain.

The operation of the adjustment 36 and the corresponding reciprocating piston 35 is from the control unit 19 on the basis of the driver on the control unit 11 regulated commands.

Referring to the 5 - 7 it is the reciprocating piston 35 about a unidirectional piston having a first position (shown in FIG 6 in which the shaft 67 completely inside the cylinder 68 is what a first position of the mower 5 corresponds) and a second position (shown in the 5 and 7 where the shaft 67 through that from the secondary valve unit 21 coming, pressurized oil from the cylinder 68 pressed, which is the second position of the mower 5 corresponds) in a cylinder 68 movable shaft 67 ,

In particular, the reciprocating piston has 35 two eyelets 69a 69b , each with the housing 37 of the mower 7 and the system 65 are connected.

The system 65 includes a main structure 70 with the eyelet 69b of the reciprocating piston 35 connected and via suitable lever mechanisms 71 on the shaft 72 the right engine 24 , the (invisible) shaft of the left engine 25 , at the tang 73 the swivel castor 35 and on the main frame 7 (especially on the housing 37 and at the front section 62 of the main frame 7 ) is anchored.

In essence, the main structure defines 70 along with the lever mechanisms 71 two four-bar linkages (one on the right and one on the left) with connecting rods 75 for support on the wheel unit 3 , simultaneously by the movement of the reciprocating piston 35 be operated.

When the shaft 67 of the reciprocating piston 35 in operation completely inside the cylinder 68 is located, are the mower 5 and the main frame 7 in the first position ( 3 ) while the mower deck 5 and the main frame 7 in the second position ( 2 and 4 ) are when the shaft 67 out of the cylinder 68 is pressed.

The regulation of the reciprocating piston 35 funded and removed from the reciprocating oil quantity via the secondary valve unit 21 , In particular, the secondary valve unit controls 21 the opening of the (not shown) solenoid valve of the oil delivery line to the reciprocating piston 35 to the shaft 67 out of the cylinder 68 while pushing the opening of the oil return solenoid valve (not shown) from the reciprocating piston 35 controls to the shaft 67 back in the cylinder 68 withdraw.

Finally, it can be seen that changes and variants can be made to the lawnmower described herein without thereby departing from the scope of the protection as defined in the accompanying claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• IT 102017000007885 [0001]
• EP 1474963 [0054]

Claims (14)

A lawnmower comprising a machine body (2) having at least one motor unit (12) and an operating unit (11) with which at least the direction and speed of the lawnmower (1) can be controlled, characterized in that the operating unit (11) has at least one joystick (14), the lawnmower comprises a mower deck (5), the operating unit (11) is configured to control the function of the mowing deck (5), the mower deck (5) comprises a plurality of mowing devices (38) each having a dome (40), a knife (41) and a shaft (42) which rotates about a respective axis and carries the knife (41) have, the mower (5) comprises a housing (37) which is formed, a seat (39) is defined in which the mowing devices (38) are housed, the housing (37) is provided with a lid (49) designed to close off the seat (39). Lawnmower after Claim 1 in that the joystick (14) is configured to control at least the direction and speed of the lawnmower (1). Lawnmower after Claim 2 or 1 a wheel unit (3) having at least two drive wheels (4) and a first gear (17) configured to transmit the motion generated by the motor unit (12) to the drive wheels (4) of the wheel unit (3). Lawnmower after Claim 3 in which the transmission (17) is a hydraulic transmission. Lawnmower after Claim 3 or 4 in which the first gear (17) is configured so that the speed of the drive wheels (4) can be controlled independently of each other. A lawnmower according to any one of claims 3 to 5, wherein the sprocket unit (3) comprises three wheels. Lawnmower after Claim 6 in which the wheel group (3) comprises a steering roller (35). Lawnmower after Claim 6 or 7 in which the drive wheels (4) are behind. A lawnmower according to any one of claims 3 to 8, comprising a frame (7) connected to the wheel assembly (3) and configured to support the mower deck (5) and the machine body (2), characterized in that the frame (7) an adjustment device (36) configured to move the mower deck (5) between a first position where the mower deck (5) is at a first height (H1) above the ground and a second position in which the mower deck (5) is at a second height (H2) above the first height (H1). Lawnmower after Claim 9 in that the adjusting device (36) comprises a lifting piston (35) which is coupled to the frame (7) and the wheel unit (3) and is driven by the first gear (17). Lawnmower after Claim 1 in which the knife (41) and the cap (40) are formed and connected with each other so that the rotation of the blade (41) generates swirls which spin the crop into the upper part of the cap (40), so that the Crop is exposed to a combined centrifugal and crushing action. Lawnmower after Claim 1 in which the mowing devices (38) are arranged in the seat (39) of the housing (37) such that the mowing areas partially overlap. A lawnmower according to any one of claims 1 to 12 including a second gear (18) configured to transmit the motion generated by the motor unit (12) to the shafts (42) of the mowing devices (38). Lawnmower after Claim 13 in which the second gearbox (18) includes a diverter shaft (47) and a main belt (45) configured to transmit movement from the engine unit (12) to the diverter shaft (47) and a plurality of secondary belts (46). configured to transmit the movement of the diverter shaft (47) to the respective shafts (42) of the mowing devices (38).

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