DE202010011917U1 - Edge strip mower for guardrail - Google Patents

Abstract

Edge mower with
A cantilever arm (1) having at least two arm parts (1a, b) which can be pivoted relative to one another and, viewed in the top view, are pivotable relative to one another in such a way that the tip then formed faces outward,
A mower head (2) pivotally mounted about an upright axle (3) on the boom arm (1),
characterized in that
the mowing head (2) comprises a pivoting lever (20) with which it is non-rotatably connected and which points in the direction of travel (10) and whose end facing away from the mowing head (2) is pivotably mounted about the upright axis (3) on the cantilever arm (1) is.

Description

I. Field of application

The The invention relates to edge mowers for Mowing the overgrown area next to the roadside.

II. Technical background

For this purpose edge trim mowers are known, which usually has a mowing head at the free end of a cantilever arm is guided, in turn to a carrier vehicle is fixed, which next to the mowing edge area on the Street moves.

Of the Auslegerarm is so pivotable that the transverse position of the cutterhead to the carrier vehicle can be varied.

One essential problem when mowing This border area is mowing close to and under the crash barriers that exist in the edge area of the road could be.

To the one prepares the low distance between the lower edge the guardrail and the underground problems, only by a low Height of housing of the mowing head be dealt with can.

The The main problem, however, is that the growth under the Guardrail mowed should be below the guardrail or behind the guardrail but added at short intervals The vertical support posts for the guardrail are located one behind the other.

At the Mowing must So the mower, while the carrier vehicle driving along the guardrail, between the support posts repeatedly in the transverse direction between the Dip the support post and approach the next support post be moved back in between in the transverse direction.

There this retraction and extension in the transverse direction not fast can be done depending on the case moving mass z. B. the mowing head, limits the speed and also frequency of Entry and exit in the transverse direction between the support posts the mowing speed and thus the work of the edge trim mower.

Though are for the free-sewing the immediate vicinity of posts - be it the road boundary posts or the support posts of guardrails - additional so-called post free mowers known however, mow these only the immediate, small surrounding area around these posts around because of their relatively low performance, so on the dive of the mowing head in the transverse direction between the support post yet not waived can be.

These Situation is lately made more difficult by the fact that in road construction to increase the resilience the guardrails the distance of the support posts has been further reduced is now well below 2 m distance, causing the immersion especially common must take place and thus the speed of the immersion process particularly strong impact on the efficiency of the edge strip mower.

Additionally conditionally this very small distance of the support posts - also in relation to the dimensions of the mowing head - that the therefor previously used movements the mowing heads, like about exclusively a pivoting of the mowing head to an upright axis, are no longer possible because of the mowing head here in certain circumstances when swinging back would already collide with the previous support post.

III. Presentation of the invention

a) Technical task

It is therefore the object according to the invention, a verge mower to create, even at very small distance of the obstacles, in particular Support post of guardrails, is able to control the area z. B. below the guardrail and especially between the support posts clear the guardrail with satisfactory work performance, ie driving speed when mowing, the Margins mower.

b) solution the task

These The object is solved by the features of claim 1. advantageous Embodiments result from the dependent claims.

By doing the mowing head not directly pivotable about the upright axis at the free end of the cantilever arm is fixed, but by means of a pivot lever, in turn rotatably with the mowing head is connected and in particular points in the direction of travel, the Swing radius of the mowing head increased. At the Panning around the same swing angle, he will be a greater distance in the transverse direction between the support post z. B. a guardrail Swung out or swiveled in across the direction of travel.

By arranging the upright axle around which the pivoting takes place, not at the front End of the boom directly, but at the free end of a crossbeam, which in turn is obliquely attached to the direction of travel at the front end of the cantilever arm, there is the opportunity to change the effective Auskraglänge and direction of this crossbeam by changing the distance between the attachment point on the cantilever and changed the pivot point for the mowing head.

There the crossbeam diagonally to the direction of travel, is going through this change the transverse position of the mowing head additionally influenced, and can be overlaid with the pivoting movement of the mowing head become.

These Crossbar, for example, a strut of a four-bar linkage z. B. a parallelogram or a trapezium whose shape a z. B. hydraulic cylinder or other working cylinder, the within the parallelogram is changed can.

This is a way the distance between the pivot point of the mowing head and the attachment point to change at the front end of the boom.

Farther the cantilever arm is preferably formed of at least two arm parts, the hinged one behind the other are connected and the thereby can be kinked so that the resulting tip points outward in the direction of the mowing head shows.

• – Schwenkwinkel des Mähkopfes mit seinem Schwenkhebel,
• – Veränderung der wirksamen Länge und Richtung der Quertraverse, die sich am vorderen Ende des Auslegerarmes befindet und den Mähkopf trägt und/oder
• – Knickbewegung des Auslegerarmes, betrachtet in der Aufsicht.

The transverse position above all of the outermost end of the mowing head can therefore be influenced by several measures:

• - swivel angle of the mowing head with its pivot lever,
• - Changing the effective length and direction of the cross-beam, which is located at the front end of the cantilever arm and carries the mowing head and / or
• - Bending movement of the boom, viewed in the supervision.

These three movements or a combination of these movements are made by a central control causes.

The release the individual movements or even the fixed combination of movements can done by different types of sensors that are an approaching Obstacle, z. B. in the form of the next Tragpfostens a guardrail, recognize.

One reliable and known sensor is a mechanical sensing rod that is in short supply runs in front of the mower head housing and on one side of the case, preferably the vehicle-side end of the mower head housing, is fixed and by a approaching contacting obstacle shifted towards mower head housing becomes.

By a correspondingly arranged switch this becomes an input signal for the Controller and then stored in the controller Motion or motion combination triggered, which is usually a driving around of the mowing head around the obstacle and then again Retracting behind the obstacle includes.

c) embodiments

embodiments according to the invention in the following example closer described. Show it:

1 : Motor conditions while bypassing the support post of a guardrail, and

2 : the combined movement path covered in the process.

The edge trim mower is structured as follows:
At the front of an only indicated carrier vehicle 33 is about z. B. a sliding shoe a boom 1 from two articulated arm parts 1a . 1b arranged in the direction of travel 10 diagonally forward, slightly to the side of the guardrail 30 towards, points, by the rear arm part 1a almost across the direction of travel 10 of the carrier vehicle 33 runs and the front arm part 1b almost exactly in the direction of travel at least during the in the 1 illustrated work input.

At the attachment point 23 at the front free end of the extension arm 1 is a parallelogram 21 attached so that it is inclined to the direction of travel and with most of its greater extension from the attachment point 23 from the side obliquely forward in the direction of the to be mowed guardrail 30 protrudes.

The parallelogram is with a boom 38 his from the point of attachment 23 further away cross strut 21c the two longer cross struts 21a , c (see 1b ) pivotable at the attachment point 23 attached.

Of the four aspirations 21a to d, the the parallelogram 21 form, the cross strut runs 21a as a longer strut of the parallelogram closer to the attachment point 23 , The other longer strut 21c is formed in two parts with a joint in between, the one part of the boom 38 is and the other part as another working cylinder 24 ' is trained.

From the boom 38 from each projecting articulated on the one hand a hydraulic cylinder 24 and on the other hand another strut 21e to the end regions of the crossbar 21a ,

Further, between the front arm part 1b of the cantilever arm 1 and and the boom 38 - off-center to the attachment point 23 - An adjusting spindle 14 to adjust the angle between these two components.

By extending the hydraulic cylinder 24 is - with unchanged attitude of the boom 1 and its bending angle 35 between his two arm parts 1a . 1b - On the one hand, the distance 36 between the attachment point 23 and the pivot point 3 reduced overall and thus also in the transverse direction 11 reduces and additionally the inclination of the crossbar 21a to the transverse direction 11 reduced.

The farthest of the side guardrail or the corner of the parallelogram approximated to the roadside 21 is as an upright axle 3 trained, at the mower head 2 is attached substantially in the working position in the transverse direction 11 stands, and at its inner, vehicle-side end a pivot lever 20 carries at right angles to the course of the mowing head 2 forward, so in the normal Mähstellung in the direction of travel 10 , stands and with this front free end on the upright axle 3 is pivotally mounted.

For pivoting this pivot lever 20 rotatable with the front, short strut 21d of the parallelogram 21 connected.

Because the front, long cross strut 21c and the boom 38 hinged together, causes an extension of the hydraulic cylinder 24 a displacement of the cross struts 21a and b towards the middle of the vehicle 13 as well as the simultaneous pivoting of the strut 21e and thus a twist of the short strut 21d forward in the direction of travel 10 what the pivot lever 20 and thus the mowing head 2 Direction vehicle center 13 pivoted.

The movement of this parallelogram is controlled - with the cantilever arm unchanged 1 - In that in front of the front of the mower head housing a probe rod 37 runs, the approach of the mowing head in the direction of travel 10 to an obstacle such as a vertical support post 31 the guardrail is pivoted by being pressed down on the mower head housing, while a switch, for. B. a rotary encoder, actuated, which triggers the sequence of movements described below:
The mower head housing is located below the direction of travel 10 running actual guardrail 30 and pushes against each other in very short intervals in a row against the support posts 31 ,

Starting from the initial state of 1a in which the probe rod 37 still no contact with the next support post 31 owns, this contact takes place for the first time in 1b , from which for reasons of simplification only the support posts 31 from the guardrail 30 are shown as C-shaped, rammed into the ground steel profiles.

Once the housing of the mowing head 2 in the direction of travel 10 so far against this support post 31 Approximated is that the switch on the pivotable end of the probe rod 37 gives a signal, what with 1c If the case is, the hydraulic cylinder starts 24 and in particular also the hydraulic cylinder 24 ' to extend, causing the parallelogram 21 is deformed so that the upright axis 3 for the mowing head 2 on the one hand is shifted away from the guardrail and also something contrary to the direction of travel 10 is shifted, which - see 1d - the front edge of the mowing head 2 very close to the support post 31 applies and moves in the direction of the road with only a relatively small additional inclination to the transverse direction 11 ,

In this case, the housing of the mowing head 2 partly under the parallelogram 21 which is located at a higher level relative to the mower head housing.

Only when the outer free end of the mowing head 2 almost at the height of the obstacle, so the support post 31 , is, in addition, in the parallelogram 21 as a hydraulic cylinder 24 ' trained front cross brace 21c extended by extending the integrated hydraulic cylinder 24 ' and in particular also the hydraulic cylinder 24 , thereby the short front cross strut 21d and with it the swivel lever 20 of the mowing head 2 swiveled further until the housing of the mowing head 2 almost at a 45 ° angle to the transverse direction 11 stands and with its outer end now on the street side on the support post 31 can pass by.

Subsequently, 1f ) also the feeler bar 37 from the support post 31 free, springs back into the position spaced from the mower head housing position and no longer emits a signal ( 1g ), whereupon the controller controls the integrated hydraulic cylinder 24 ' in the crossbar 21c retracts again and in particular also the hydraulic cylinder 24 , whereby the free outer end of the mowing head 2 almost in the direction of travel 10 swings forward.

Subsequently or superimposed with it, the hydraulic cylinder 24 retracted, so that the pivot point of the upright axis 3 shifted back to the front and toward the road, and so that the mower head dips in the transverse direction 11 again increasingly behind the now bypassed support post 31 one until he's in the 2 shown end position, the starting position for the next Umfahrungszyklus has reached.

In 2 is the path of movement 40 the front outer corner of the mower head housing 2 shown:
As can be seen, the normal is in the direction of travel 10 running movement of the mower head and thus also the front outer corner at each obstacle interrupted by an almost trapezoidal movement path 40 , wherein the rising and falling legs of the trapezium almost perpendicular to the longitudinal direction 10 so in the transverse direction 11 , towards the support arm 1 or carrier vehicle 33 or road, to about the roadside end of the support post 31 , and the roof of the trapezoid approximately parallel to the direction of travel 10 runs.

As with all this, the position of the boom 1 preferably remains unchanged, only the masses of the mowing head 2 and the parallelogram 21 be moved, resulting in less restlessness and vibration in the Ranstreifenmäher as additional movements of the boom 1 For example, by changing the folding angle 35 ,

• – einer Schwenkbewegung 34 des Mähkopfes 2 um eine aufrechte Achse 3 am vorderen Ende des Auslegerarmes 1,
• – einer Querbewegung 39 der aufrechtren Achse 3 in Richtung Fahrzeuglängsmitte 13,
• – einer kombinierten Bewegung 40, die eine Abstandsveränderung 36 der aufrechten Achse 3, um die der Mähkopf 2 dreht, relativ zum freien Ende des Auslegerarmes 1 umfasst.

For mowing the vegetation next to and under a guardrail 30 also between the vertical support posts 31 the guardrail 30 by means of a mowing head 2 , which has a cantilever arm 1 on a carrier vehicle 33 attached, which is along the guardrail 30 drives, performs the mowing head 2 for lateral immersion between the vertical support posts 31 the guardrail a combined movement 40 completes, consisting of

• - a pivoting movement 34 of the mowing head 2 around an upright axis 3 at the front end of the boom 1 .
• - a transverse movement 39 the upright axis 3 towards the middle of the vehicle 13 .
• - a combined movement 40 that a change in distance 36 the upright axis 3 to that of the mowing head 2 rotates relative to the free end of the cantilever arm 1 includes.

Preferably, a kinking movement 35 of the at least two-part cantilever arm 1 about a movement of the mowing head 2 in the transverse direction 11 to the middle of the vehicle 13 causes.

1

boom

1a, b

arm parts

2

mowing head

3

axis

10

direction of travel

11

transversely

13

Vehicle longitudinal center

14

turn setting

20

pivoting lever

21

parallelogram

21a-d

strut

22

distance

23

attachment point

24 24 '

hydraulic cylinders

25

control

30

barrier

31

support post

33

carrier vehicle

34

pivotal movement

35

bending movement

36

change in distance

37

testrod

38

boom

39

transverse movement

40

combined Move

Claims (5)

Randstreifenmäher with - a cantilever arm ( 1 ) with at least two relatively pivotable arm parts ( 1a , b) which, viewed in the top view, are pivotable relative to one another in such a way that the tip then formed points outwards, - a mowing head ( 2 ) pivotable about an upright axis ( 3 ) on the extension arm ( 1 ), characterized in that the mowing head ( 2 ) a pivot lever ( 20 ), with which it is rotatably connected and in the direction of travel ( 10 ), and its from the mowing head ( 2 ) groundbreaking end pivoted about the upright axis ( 3 ) on the extension arm ( 1 ) is attached. Edge trim mower according to claim 1, characterized in that the upright axle ( 3 ) at the free end of a transverse strut ( 21a ) arranged at the front end of the cantilever arm ( 1 ) is attached and obliquely to the direction of travel ( 10 ) and at which the distance ( 22 ) between the attachment point ( 23 ) on the extension arm ( 1 ) and the upright axis ( 3 ) is changeable. Edge trimming mower according to one of the preceding claims, characterized in that the transverse strut ( 21 ) Part of one at the attachment point ( 23 ) of the cantilever arm ( 1 ) attached parallelogram ( 21 ), whose shape and / or rotational position to the attachment point ( 23 ) is variable in particular, with the aid of at least one hydraulic cylinder ( 24 . 24 ' ). Edge strip mower according to one of the preceding claims, characterized in that the edge strip mowing device has a control ( 25 ) around summarizes the bending of the cantilever arm ( 1 ) about the vertical axis, the pivoting of the mowing head ( 2 ) around the upright axis ( 3 ) and optionally changing the effective length and the position of the transverse strut ( 21 ) coordinated in time to each other. Edge trimming mower according to one of the preceding claims, characterized in that the mowing head ( 2 ) one in the direction of travel ( 10 ) before the mowing head ( 2 ) extending sensing rod ( 37 ) pivotally mounted on the mowing head ( 2 ) and their displacement as the input signal of the controller ( 25 ) is reported.