DE202005006541U1 - Grass cutting/mowing machine, for grass cutting at roadside verges, has a jib with lateral movement and linked arms mounted to the vehicle and which can be laid and secured to the rear of the driver's cabin - Google Patents

Abstract

The grass mowing and/or cutting machine (1) has a moving jib (3), with linked arms (12-14) and a working head (4) at its free end, extending outwards from the vehicle (2) in the working position. The jib can be deployed selectively to one side or placed and gripped along the vehicle length behind the driver's cabin (21) for transport. The jib is held with lateral movement on a carrier (5) at the front of the vehicle and, when laid to the rear, it is shifted to the side against a vertical plane along the vehicle center.

Description

The Invention relates to a mowing and / or cutting device with a holder on a vehicle and opposite this movable boom for supporting a working head according to the preamble of claim 1.

It are such devices known in which a boom reaching back over a driver's cab is disposable, so that a from the boom held working head on a holder of load area supportable is. Thus, the usability of the cargo space for other purposes is limited in space a fully loaded cargo bed can also be an unfavorable Weight distribution through the working head also stored there result.

Of the Invention is based on the problem, here an improvement to reach.

The Invention solves this problem by mowing and / or cutting device with the features of claim 1. With regard to advantageous embodiments will depend on the dependent claims 2 to 16 referenced.

With The invention are at least two different transport positions a boom possible, so that ever After use, it can be decided whether this boom is longitudinal or to be held transversely to the vehicle. For example, so can the load area for the Winter service with a high-build and heavy grit container with spreading device be provided and then the boom with the working head in front are held transversely in front of the vehicle, whereas the boom after Dismantling of the grit container then the cab across can be stored to the rear. Preferably can be from the driver's cab choose without any tag, which transport position should be set.

If the boom on a front-side support device transverse to the vehicle kept movable and for a rearward position thereon relative to a vertical vehicle longitudinal plane laterally staggered, this can be a significant improvement Cause the driver's field of vision. The boom can then, for example be moved far to the right to a left-seated driver a big To allow visual range.

Especially Cheap can the boom out of the rearward position out in a similar manner to both sides towards the front be. this makes possible a use of the working head on both sides of the vehicle, without that in between a repositioning a bolt, a dismantling or conversion or similar activities would be required.

there can be particularly advantageous by a drive unit with two different Be sure Kraftangriffsrichtungen that when a force in the vicinity reaches a dead center, another force in a effectively working position with large lever arm can stand. Thereby arises at any time a large torque, the pivoting range is significantly enlarged because also over an angle of 180 ° can be pivoted, what with a single cylinder without exceeding a dead center not possible would.

Especially can for the Force transmission from different directions at least two the boom acting hydraulic cylinders are provided, which can be realized with a low control effort and favorable attack angle for the Force introduction allows.

Very Cheap the directions of force are axially symmetric to a vertical pivot axis of the boom intersecting vehicle longitudinal plane arranged, which is responsible for both pivoting directions of the boom from this position out the same Conditions arise.

Provided the angle of movement out of the rearward facing position out at least 90 ° to each Side is, The boom can also reach laterally from the vehicle. At an angle of about 110 ° also a Schrägverschwenken with a forward facing the vehicle for example component possible. Of the The driver can keep an eye on the working head very well.

Farther is it cheap when the pivoting movement about the vertical pivot axis of the boom is executable free of external attacks. These can then saved. A corresponding wear through Contact with attacks is eliminated.

Especially it is advantageous to avoid a dead center when in the rearwards pointing longitudinal position the lines of action along the longitudinal extent the hydraulic cylinder pass by the deflection axis on the vehicle side.

A Especially with regard to the control convenient arrangement with a huge length spreading between fully extended and fully retracted drive is reached, when the hydraulic cylinders each comprise an outer cylinder whose Piston rod like a telescope with an inner cylinder an extendable and acting on the articulation axis on the lever of the deflection axis inner piston rod forms.

at in the backward direction pointing longitudinal position of Cantilever can both the piston rod of the outer as also retracted the piston rod of the inner cylinder, so that the Drive unit very compact and space-saving behind the actual vertical pivot axis of the boom can be arranged.

Provided the boom, starting from a vehicle-side carrier, at least one first, in a working position hochaufbaren section, a adjoining it transverse reachable second section and at least a third, down in the direction of working head extendable section is it allows, too to spread wide obstacles, wherein the transverse cross-section in this overarching position above of the obstacle is. The boom forms a portal, whose upper frame part essentially transversely and thus can bridge a considerable width.

Especially Cheap the third section is variable in length, even at a high position of the obstacle cross-over Section to reach the ground.

Of the second, to the first articulated section can be a longitudinal extension of at least 90 centimeters, often clearly over 1.20 meters, whereby the spreading of wide directional and place information signs is possible.

Also an overlap a cab of the Vehicle is unproblematic with the formation of the invention possible, being characterized by the towering first section of this also close in front a steeply standing windshield can stand and unlike not a big one in the prior art Distance from this required in the vehicle longitudinal direction.

Of the Outrigger can still be very space-saving in a transverse transport position be foldable, then the first section across the vehicle, the second section at least almost vertically downwards and the third section aslant up or nearly horizontal with one opposite the first section Cross component runs. The working head can in particular, to a second boom with second working head to leave room, then stand vertically.

Advantageous is one in the longitudinal transport position Length and / or angle adjustment of the third section adaptable to the geometry of the respective loading area, so that these can be different or long.

One greater Advantage of the invention is also that, despite the different Transport positions of a boom and a second boom with at least one further working head can be provided, for example for a laterally offset mowing of grass strips in front and behind guide posts. Also when mounting the second Outrigger can with the space-saving transverse transport position too the first boom still occupies both transport positions, where it saves space in its transversely stored transport position at least partially can overlap the second boom. The second Outrigger can this form a bearing surface for the first.

Further Advantages and features of the invention will become apparent from the drawing illustrated and described below embodiments of the subject the invention.

In the drawing shows:

1 a schematic front view of a cutting and / or cutting device according to the invention with a mowing device arranged on the front of a vehicle in working position with an overhanging arm overhang,

2 a similar view as 1 with a jib located in a transverse transport position,

3 the mowing and / or cutting device after 1 in side view with located in a longitudinal transport position boom,

4 a similar view as 3 with a raised and more forward shelf on the bed for the working head.

5 a perspective detail view of the vehicle-side carrier with two superimposed guide rails and supported bracket for the transverse displacement of the boom,

6 a schematic plan view of the holder with the drive unit in maximally forward to the right swung-out position of the backable boom,

7 a similar view as 6 with about the vehicle to the right swung position of the boom, approximately according to the boom position after 1 .

8th a similar view as 7 with the boom pointing backwards towards the vehicle, approximately in accordance with its position in FIG 3 .

9 a similar view as 5 of Front carrier, but in a configuration with two located here in working position arms,

10 the beam with outriggers after 9 in top view,

11 a similar view as 9 of the carrier equipped with two jibs but in the transport position of both jibs held transversely in front of the vehicle,

12 the carrier with two arms in transport position 11 in top view,

13 the carrier with two arms in transport position 11 in perspective view from diagonally right front.

This in 1 shown and in total with 1 designated mower and / or cutting device includes a self-propelled vehicle here 2 , which is not mandatory, at least one here multi-part boom 3 with at least one working head 4 , which can be designed, for example, as a mowing, cutting or milling head or as a clearing or cleaning head. It can be provided with cutting and / or impact means. In addition to grass mowing heads with one or more vertically or horizontally rotating cutting or impact rollers, for example, a pure hedge trimmer or the like can be mounted. In addition to the front assembly of the boom shown here 3 In addition, an assembly on the loading area or a rear mounting of a boom into consideration.

The boom 3 is on a carrier 5 mounted, which is a transverse guide device 6 with for example two horizontal profiles and one across the vehicle 2 slidable and towering mount 8th with an upright and hereinafter referred to as vertical pivot axis 7 covers around the boom 3 is pivotable. Because this bracket 8th even opposite the transverse guide device 6 not laterally engages, it is not referred to here as the first section of the boom.

As the boom on the front support means 5 across the vehicle 2 is held movable, it is for a described below in more detail longitudinal transport position according to the 3 and 4 laterally staggered relative to a vertical vehicle longitudinal plane, so that it does not necessarily have to be in a vertical vehicle longitudinal center plane, but may be moved transversely, for example, in front of the passenger side.

The vehicle 2 can be designed as a narrow track tractor to allow flexible use even in confined areas. Even larger, truck-like vehicles are possible.

The retractable boom 3 includes in the illustrated embodiment, at least a first, in a working position ( 1 ) highly tractable section 9 , an adjoining transverse reachable second section 10 and a third, down towards the working head 4 extendable section 11 , All sections 9 . 10 . 11 are articulated and individually connected to one another by means of drives pivotable against each other. At the third section 11 is directly or with the interposition of other sections of the working head 4 pivotable about an axis 26 attached.

The one from the carrier 5 Resolvable first section 9 of the jib 3 is here as well as the second section 10 formed as a rigid profile, but could also be variable in length. At least in a working position, the first section may have a length L1 of at least about 1.80 meters, in order to be able to overlap high obstacles from 2.50 to 3.0 meters in height. In the illustrated embodiment, the length L1 of the first section 9 about two meters.

The second section 10 of the jib 3 However, at least in this working position can be significantly shorter. He has in particular a - possibly variable - length L2 between 0.70 and 1.60 meters. In the in 1 shown working position forms this section 10 the upper frame part of a portal formed by the boom and engages over the obstacle 20 lying substantially horizontally or only slightly inclined. This results in an optimized clear width below the portal, which is almost the entire length L2 of the section 10 may include. There may also be other working positions in which, for example, a variable-length second section is the length of the first section 9 could also exceed. In any case, there is a position in which the section 10 shorter than the first section 9 is, so as to place the working head 4 close to the overrun obstacle 20 to enable.

The third section 11 is variable in length here in the manner of a telescope, its length L3 can be considerably more than two meters.

In the in 2 shown transverse transport position is the boom 3 across in front of (or behind) the vehicle 2 so halterbar that the first section 9 as the uppermost part of the jib 3 for example, on the lower edge of a windshield across the vehicle 2 lies, the second section 10 at least almost vertically downwards, which is possible because of its short length, and the third section 11 in the retracted position obliquely upward with a cross section opposite to the first portion.

The pack size is therefore minimized, the width low. The mowing head 4 can thus be kept horizontal and far down, the driver thus remains an optimized field of view. Also a vertical holder of the mowing head 4 is possible and is further down in the 11 to 13 shown.

In addition to the transverse transport position is also at least one in the 3 and 4 illustrated longitudinal transport position without any modification allows in which the boom 3 is frontally mounted longitudinally to the vehicle halterbar, wherein the first section 9 positioned so far that its articulation to the second section 10 the cab 21 surmounted, the second section approximately horizontally above the cab 21 is located and the third section 11 slightly down towards a cargo area 22 extends, where one - in the illustration after 4 raised - storage 23 for the working head 4 can be provided. In that the first section 9 can rise steeply and to bridge to the working head wearing last section 11 an intermediate section 10 is provided, the windshield can be steep, without any risk of collision with the boom 3 arises. Nevertheless, the holder must 8th be placed for the boom not far in front of the windshield to allow this collision freedom. The vehicle length can therefore remain low.

In this longitudinal transport position is a length and / or angle adjustment of the third section 11 to the geometry of the respective loading area 22 adaptable, so that the height of the tray 23 and their longitudinal orientation may be different. In 3 is the third section 11 the boom partially extended, so that the working head here in the rear of the truck bed 22 located in 4 is for a further forward and upward position of the working head 4 the third section 1 retracted. There are therefore no special requirements for the vehicle geometry. It can also be various existing vehicles 2 subsequently with a boom 3 , the at least in a first transport position transversely in front of the vehicle and in a second transport position along the rear behind a cab 21 of the vehicle 2 is removable, retrofitted.

For pivoting the boom 3 around the axis 7 is one with the boom 3 across the vehicle 2 movable hydraulic drive unit 12 provided, here two hydraulic cylinder units 13 . 14 includes, which are referred to in the following, despite their complicated structure (see below) as a whole hydraulic cylinder. They are horizontal and thus perpendicular to the pivot axis 7 located of the jib. In backward pointing zero position of the boom 3 ( 3 . 4 . 8th ) are the hydraulic cylinders 13 . 14 symmetrical to each other and symmetrical to the pivot axis 7 cutting vehicle longitudinal plane 24 arranged.

The hydraulic cylinders 13 . 14 grab levers from different directions 15 . 16 on, the holder 8th assigned. In the embodiment, the levers 15 . 16 Part of a common single or double plate 17 , At this grip the hydraulic cylinders 13 . 14 each over a parallel to the pivot axis 7 standing articulation axis 27 . 28 with their piston rods 13c . 14c at. At their piston bottom ends are the cylinders 13 . 14 via mounting axles 29 . 30 , which are also parallel to the axis 7 standing, pivotally mounted on a carrier 31 supported. The connecting lines of the mounting axes 29 . 30 with the boom axis 7 form an isosceles triangle ( 8th ). In this position of the jib 3 leads one the mounting axis 29 a hydraulic cylinder 13 and the articulation axis 27 cutting line L1 on the vehicle side on the axle 7 past. The same applies to a mounting axis 30 of the hydraulic cylinder 14 and its axis of articulation 28 cutting action line L2. As a result, this position does not represent a dead center position. Any movement of a hydraulic cylinder 13 . 14 leads to a torque around the axis 7 ,

In the embodiment, the possibility of movement of the boom 3 around the axis 7 completely symmetrical to the right and left, so as to allow a modification of both the right and the left side of the road without modification. The rearward position of the boom 3 forms a dynamic or static zero position. Out of this, the boom is on both sides at least 90 ° about the axis 7 pivotable. Then he is in panning to the right side of the vehicle, for example, in the transversely extending position 1 or the transverse transport position 2 , Advantageously, the boom 3 still to be pivoted forward by at least 20 °, compared to the zero position so by at least 110 °, whereby he then in the in 6 indicated and slightly before the front end of the vehicle cross position comes.

All swivel positions are solely by appropriate action on the hydraulic cylinder 13 . 14 reach, whose end positions limit the tilt angle. Thus, other external stops to limit the swing angle are completely unnecessary.

As in the 6 to 8th becomes clear, there is every hydraulic cylinder 13 . 14 of two nested cylinders; nevertheless, only three external connections must be provided:

The at the support axes 29 . 30 pivotable on the carrier 31 held outer piston housing 13a respectively. 14a is provided on the piston bottom side with a pressure medium connection AR2 or AL2. For piston rod side pressure medium loading of the outer cylinder of the terminal BR2 or BL2 is used.

The in the piston housing 13a . 14a of the outer cylinder liftable piston rod 13b respectively. 14b at the same time forms the piston housing for an inner piston rod 13c respectively. 14c , which then at the pivot axes 27 . 28 the lever 15 . 16 the plate 17 can attack.

to Pressure medium only the inner cylinder is used piston rod side the connection BR1 or BL1.

to piston bottom side pressurizing the inner cylinder serves the passage AR1 or AL1, the piston crown of the inner Cylinder with that of the outer cylinder combines. This connection is not mandatory, but simplistic. Another external connection could alternatively be provided.

In the zero position after 8th are the piston rod side ports BR1 and BR2 of the left in the direction of travel cylinder 13 and the piston rod side ports BL1 and BL2 of the right cylinder in the direction of travel F. 14 subjected to pressure medium, so that both the piston rods 13c . 14c the inner cylinder as well as the piston rods 13b . 14b the outer cylinder are retracted. The piston bottom ports AR2, AL2 are connected to the return.

To move out of this position, a deflection z. B. to the right to effect (transition from 8th to 7 ), becomes the left cylinder 13 at port AR2, so piston bottom side, acted upon with pressure medium. At the same time also pressure medium passes through the channel AR1 in the inner cylinder so that it first extends completely because of the smaller resistance and then the outer cylinder partially extends with. The connections BR1 and BR2 are connected to the return for this purpose. On the right cylinder 14 However, only the piston rod-side terminal BL1 of the inner cylinder is connected to the return, the piston rod 14c This inner cylinder can therefore extend, but not the piston rod 22b of the outer cylinder, since the terminal BL2 is not enabled. Therefore, also the outer piston rod 13b of the left cylinder 13 not fully extend, but only the inner piston rod 13c , This always results in a clear direction of movement out of the zero position.

To move from the transversely deflected position 7 out the outrigger 3 to be able to move further forward ( 6 ) and thus from the zero position to achieve a swivel angle of the boom of 110 ° or 115 ° (transition from 7 to 6 ), it is necessary that the outer piston rod 13b of the left cylinder 13 fully extended. For this purpose, by switching a valve and the piston rod side terminal BL2 of the outer right cylinder 14 connected to the return. Otherwise, the circuit remains unchanged, now the further pressure medium loading of the port AR2 can no longer only cause the inner piston rod 13c fully extended, but now can also be the outer piston rod 13b Extend completely, since the back pressure is released by the activation of the terminal BL2.

This represents an extreme position of the left cylinder 13 while on the right 14 the outer piston rod 14b not fully extended ( 6 ). The drive unit 12 is thus limited automatically in its maximum deflection. Therefore, mechanical stops are not required. Also a collision of the hydraulic cylinders 13 . 14 is therefore forcibly avoided. Panning to the other side is equivalent undertaking with reverse admission.

It occurs in the entire movement not a single pivot angle, in which both power lines - between mounting axis 29 and articulation axis 27 (respectively. 30 and 28 ) the axis 7 would cut. It must therefore be overcome for the first time also at the transition from right to left swinging no dead center, which is particularly advantageous for a fluid and fast movement.

The force action line 29 - 27 the here at the transition from 8th to 6 by pressure-driving cylinder 13 remains on the vehicle side of the axle during this entire movement 7 and do not cut them. A passage through the axis takes place only at the line of action of the here passively taken cylinder 14 instead of and is therefore harmless for the high efficiency of power transmission.

In the 9 to 13 is shown that when compared to the 1 to 8th unchanged boom 3 In addition, a second, also transversely displaceable boom 18 with one or more other working heads 19 , For example, mowing heads, can be mounted.

Nevertheless, the first boom 3 this unaffected in turn in both transport positions, so both across the vehicle and also grab longitudinally behind, remain storable.

That also lying transversely in front of the vehicle transport position of the first boom 3 is preserved in the 11 to 13 Recognizable: The first boom stands with its holder 8th with regard to the direction of travel F on the far left. The second boom 18 is at the transverse guide device 6 Relocated approximately in the middle and of the with around the axis 26 vertical cutting head 4 and otherwise exactly as in 2 filed first boom overlapped. For this purpose, the second boom 18 one of the transverse guide device 6 forward in the direction of travel F -stretched low base 25 about which the third section 11 of the jib 3 can grab ( 13 ), so that both arms 3 . 18 can nestle in each other. Depending on the training, this socket 25 also an at least partially supporting storage for a part 11 of the stowable boom 3 form.

An attachment or disassembly of the second boom 18 is easily possible, so that there is a high degree of flexibility.

Also, for example, for a slow ride the first boom 3 in the transverse transport position and unaffected by the second boom for a faster ride or for another job 18 pointing in the longitudinal transport position to the rear.

In working position ( 9 . 10 ) of both working heads 4 . 19 These can work laterally offset from each other, for example, two strips in front of and behind a crash barrier or the like mow. The base 25 and the holder 18 can both largely as far as the direction of travel to the right ( 9 . 10 ) as well as, for example, for a link operation to the other side.

1

Mowing and or Cutter,

2

Vehicle,

3

Boom,

4

Working head,

5

Carrier,

6

Lateral guidance device,

7

Pivot axis

8th

Bracket,

9

first Section,

10

second Section,

11

third Section of the jib,

12

Drive unit,

13

left Hydraulic cylinders,

14

right Hydraulic cylinders,

15

Lever,

16

Lever,

17

Plate,

18

second Boom,

19

second working head

20

Obstacle,

21

Cab,

22

loading area

23

storage,

24

Longitudinal plane

25

Base,

26

axis

27

hinge axis,

28

hinge axis,

29

Bracket spindle,

30

Bracket spindle,

31

carrier

Claims (16)

Mowing and / or cutting device ( 1 ) with at least one vehicle ( 2 ) moveable boom ( 3 ; 18 ), which is extensible in a working position abroad and at least one working head ( 4 ; 19 ) carries, characterized in that a boom ( 3 ) optionally at least in a first transport position transversely in front of the vehicle ( 2 ) or in a second transport position along the rear behind a driver's cab ( 21 ) of the vehicle ( 2 ) is removable. Mowing and / or cutting device according to claim 1, characterized in that the extendable to the rear boom ( 3 ) on a front-side support device ( 5 ) across the vehicle ( 2 ) is movably supported and laterally displaceable for a rearward position thereof opposite to a vertical vehicle longitudinal median plane. Mowing and / or cutting device according to one of claims 1 or 2, characterized in that the can be stored to the rear boom ( 3 ) From the parallel to the vehicle longitudinal direction to the rear cross position out in a similar manner to both sides towards the front is pivotally. Mowing and / or cutting device according to one of claims 1 to 3, characterized in that for the effect of the two pivoting movements of the boom ( 3 ) in an at least almost vertical to the vertical pivot axis ( 7 ) of the jib ( 3 ) a drive unit ( 12 ) is provided, by which the boom ( 3 ) from two or more different directions ( 29 - 27 ; 30 - 28 ) can be acted upon with force. Mowing and / or cutting device according to claim 4, characterized in that the drive unit ( 12 ) a hydraulic drive unit with at least two on the boom ( 3 ) actable hydraulic cylinders ( 13 ; 14 ). Mowing and / or cutting device ( 1 ) according to one of claims 1 to 5, characterized in that the angle of movement of the boom ( 3 ) from the un at least 110 ° to each side. Mowing and / or cutting device according to one of claims 1 to 6, characterized in that the directions of force ( 29 - 27 ; 30 - 28 ) at least in a zero position symmetrical to a vertical pivot axis ( 7 ) of the jib ( 3 ) intersecting vehicle longitudinal plane ( 24 ) are arranged. Mowing and / or cutting device according to one of claims 1 to 7, characterized in that the pivoting movement about the vertical axis ( 7 ) is executable free of external attacks. Mowing and / or cutting device according to one of claims 1 to 8, characterized in that in the rearwardly facing longitudinal position of the boom ( 3 ) the line of action along the longitudinal axis of at least one hydraulic cylinder ( 13 ; 14 ) on the vehicle side on the boom axis ( 7 ) passes by. Mowing and / or cutting device according to one of claims 1 to 9, characterized in that for the pivoting movement of the boom ( 3 ) at least one hydraulic cylinder ( 13 ; 14 ) is provided which an outer cylinder ( 13a . 13b ; 14a . 14b ) whose piston rod ( 13b ; 14b ) in the manner of a telescope an inner cylinder ( 13b . 13c ; 14b . 14c ) with an extendable inner piston rod ( 13c ; 14c ) trains. Mowing and / or cutting device according to one of claims 1 to 10, characterized in that the can be stored to the rear boom ( 3 ), at least a first upwardly and downwardly movable, in a working position hochaufgestbaren section ( 9 ), an adjoining transverse second section ( 10 ) and at least a third, down towards working head ( 4 ) extendable section ( 11 ). Mowing and / or cutting device according to claim 1 1, characterized in that this jib ( 3 ) in a transverse transport position transversely in front of or behind the vehicle ( 2 ) is holdable such that the first section ( 9 ) across the vehicle ( 2 ), the second section ( 10 ) at least almost vertically downwards and the third section ( 11 ) obliquely upward or nearly horizontally with a first section ( 9 ) runs opposite transverse component. Mowing and / or cutting device according to one of claims 11 or 12, characterized in that in a longitudinal transport position of this jib ( 3 ) at front-side cultivation the first section ( 9 ) is positioned so far that its articulation to the second section ( 10 ) the cab ( 21 ), the second section ( 10 ) above the cab ( 21 ) and the third section ( 11 ) down towards a loading area ( 22 ). Mowing and / or cutting device according to claim 13, characterized in that in the longitudinal transport position a length and / or angle adjustment of the third section ( 11 ) to the geometry of the respective loading area ( 22 ) is adaptable. Mowing and / or cutting device according to one of claims 11 to 14, characterized in that on the vehicle ( 2 ) a second boom ( 18 ) with at least one further working head ( 19 ) is held. Mowing and / or cutting device according to one of claims 11 to 14, characterized in that the second boom ( 18 ) in its transport position at least partially ( 25 ) from the first boom ( 3 ) is übergreifbar in its transversely deposited transport position.