DE10221327A1 - Roadside grass and hedge cutting device, comprising two mowing heads and additional unit for cutting grass around posts - Google Patents

Abstract

The device is equipped with a first cutting unit assembled of a cutting head (2a) joined to a swivel mounted arm (3, 17) positioned at the corner (23) of the vehicle (7) and pointing to the front, a second cutting unit with a bigger cutting head (2b) and a transversally positioned carrying arm (4), swivel mounted in the center of the front frame (8) and used for cutting grass and weeds at a distance from the road (20). A third arm is located between both units (2a, 2b) and is provided with a disk at a curved extension swivel mounted to the arm. The disk is guided around vertical posts (22) cutting the grass around them without damaging the items (22).

Description

I. Field of application

The invention relates to a verge mower according to the Preamble of claim 1.

II. Technical background

Such verge mowers are on Work vehicles, particularly one behind the driver's cabin arranged loading area have, arranged and work laterally in the working position offset to the work vehicle so that this along the road or can drive the way while the verge next to the road processed or mowed becomes.

In terms of saving costs striving for that mowing the edge strip can be done with only one operator, that is at the same time the work vehicle drives and the still necessary additional Control of the mower at the same time can make. This is only possible if these additional control measures to the least possible Dimension are limited or the control of the mower if possible takes place fully automatically, because only then can high driving speeds while of work effort and thus high work performance achievable are.

With that in mind is a good view of the operator from his driver's seat to the working position mowing heads are necessary.

For this reason are - in addition the earlier on the work surfaces arranged boom arms, which carry the mowing head and with it however, work to the side or even behind the driver's position - in the latter Time increases that by means of a front frame in front of the front of the work vehicle fixed mowers in use, because their working position in the direction of travel in front of the vehicle and thus are in the driver's field of vision.

A typical problem is mowing edge strips of streets, in which the road guide posts are arranged at a distance are.

When mowing such an edge strip with only one mowing head is mowing of the entire edge strip in a single operation as a rule not possible. Instead, the area between Street outside edge and the road post mown and in a second step the edge area outside the road post, wherein in at least one of the operations the - viewed in the direction of travel - width range immediately between the road post can also be mowed by moving the working head in the direction of travel up to the guide post drove up, and then the mowing head is shifted in such a way that the guide post will circulate. This too usually happens automatically, but should be as high as possible Driving speed possible his.

In this context, edge trim mowers with two are already available Mowing heads known which are offset to the side and to each other at the same time both areas, i.e. inside and outside of the road guide posts, mow in one operation. Such an implement is from the company Gerhard Dücker GmbH & Co. KG, Stadtlohn, known. There is also a front frame on the one hand in the working position at the front, the edge area closest to the road first mowing head and a second one behind, but overlapping laterally to the outside mowing head available, each about separate boom arms, which are attached to the front frame, are arranged.

It is already known the inside, so closer mowing head running on the vehicle to equip a touch device so that it encounters obstacles such as guide posts up to contact and then triggered by the feeler on the Drives around these guide posts inside. Still remains this solution a rest of vegetation around the delineators, for one reason the second outer cutter head, because of its lateral space requirements for a housing and additionally also because of the necessary visual control from the driver not to immediately can mow to the outside of the guide post, on the other hand because of the dimensions and kinematics of movement of the inner mowing head when mowing around around such a guide post.

For this reason, so far either leave the vegetation around the guide posts or use e.g. of a hand-held mower mowed a second worker become.

It also plays a role in that the stability this guide post is only limited, i.e. also by an automatic one mowing around Device, such as the first mowing head, against the guide post only low forces may apply.

III. Presentation of the invention

a) Technical task

It is therefore the object according to the invention a verge mower for the verges of streets to create which is also the environment of post-like obstacles how the guide post mows so close to the post that no mowing is no longer necessary and, in particular, no unturned growth at all remains around the post.

b) solving the problem

This object is achieved by the characterizing features of claims 1, 9, 10, 11, 12, 13, 20 and 42 solved. Advantageous embodiments result from the subclaims.

By attaching the post mower to the same mounting unit on the carrier vehicle as the rest of the mower existing components used and with regard to the attachment on carrier vehicle will not be an additional one Attachment needed for attachment.

This mounting unit is included a front mower in all Usually a front frame that is on or in front of the front end of the vehicle is attached and then the at least one first mowing head as well wears like the post mower.

With a rear mower, this is a support frame, either at or behind the rear end of the carrier vehicle or on the rear loading area is arranged.

The advantage with front mowers that from the front mounting unit, especially the front frame, aslant Standing forward lies in the visibility of the driver or passenger of the carrier vehicle. This is important because of the direction of travel of the carrier vehicle the rough direction of mowing and through the relative position of the mowers to the carrier vehicle the fine position is specified by the driver or the passenger.

To ensure this also for the post mower, is the post mower on a mower arm attached in its normal mowing position to the Direction of travel of the carrier vehicle protrudes diagonally to the front when attached to the front. With rear This freemower boom arm protrudes against it obliquely in the back, since that is slanted The visibility of the driver or front passenger protrudes forward hardly promote would, that weird In contrast, protruding to the rear is the risk of damage if the wrong one Position setting reduced.

Because the post mower is comparatively small and it’s light, and so is the outrigger arm that supports it, is the additional through the post mower at the Fastening unit weight applied to a normal at least first mowing head negligible, even with the weight-critical arrangement in the front area of the carrier vehicle.

Just like the at least first mowing head of the Mower can also the post mower opposite the fastening unit carrying it by a substantially vertical vertical folding axis from the normal mowing position to a transport position on the carrier vehicle and especially not laterally the carrier vehicle above, be pivoted.

The is in the transport position Freemowers, e.g. with its support arm and / or with its touch disk, on the fastening device, especially the front frame or another part of the carrier vehicle or the mower. Unless the post mower directly on the fastening device for the other mowing heads, for example the front frame, is arranged, is a fastening on the from the foremost mowing head to To recommend fastening device facing away from edge strips, either at a fixed position, or slidable in the transverse direction.

Also an attachment to the fastening device sideways outside, towards the edge strip, the foremost, i.e. the first, mowing head is possible.

If the post arm for the post mower is not is arranged directly, but indirectly on the fastening unit, is an attachment to the cantilever arm of the mowing head, especially the first, farthest forward and mowing head preferred. The Boom arm of the lawn mower then strives from the extension arm of this mowing head and becomes relative to this, and not relatively directly to the carrier vehicle, in the lateral position, in the longitudinal offset and possibly also at high altitude set.

The cantilever arm for the post mower exists preferably only two articulated arms and grabs the mower the mower preferably just above the mower to the free height of the mower to reduce everything in its transport position.

The freemower, which e.g. crescent-shaped support arm and comprises a mowing device arranged at its free end preferably stored in the transport position so that - at one Front mower - the mower of the free mower furthest left, i.e. on the edge of the edge strip to be mowed, Side of the carrier vehicle from there, the sickle arm strives to the left and in particular about the upward jib arm for one the mowing heads, in particular the second, outer and rear, mower arm, extends around, so that the two are then approximately perpendicular standing partial arms folded vertically into the transport position Free-arm mower essentially standing vertically in front of the right area of the carrier vehicle up or even in front of its right outer edge, without preferably over the project the right outer edge of the carrier vehicle.

Depending on the design of the joints of the freemower boom arm, the boom arm can also be placed in the transport state lying flat in front of or above the fastening unit, in particular the front frame, in particular in the described transport position of the freemower mowing device, that it does not exceed the height of the lower edge the windscreen of the carrier vehicle rises. The post mower is driven by the same type of energy, preferably hydraulic oil, as the first mowing head, and the central control for the mower, that is, the drive and positioning of the at least first mowing head, also controls the post mower.

The control unit includes control elements for the Transverse position of the first cutter head and preferably an actuator for the transverse position Post Mower relative to the first mowing head. The control system further comprises at least one actuating element, in particular an actuator for every Unit of work (each mowing head as well as the post mower) to move from the working position to mowing is in the transport position and back, so that if necessary with a single actuator all work units at once, if necessary in a defined one chronological order, from the working position to the transport position can be spent and vice versa.

So that an edge strip next to the Road, in the guide post at approximately equal longitudinal distances, and each approximately equidistant from the side edge of the street are mowed in one go in the working position (mowing position) is the mowing width the mower set so that they overlap slightly to the side to the outside edge of the working width of the first mowing head, which is the area between the side edge of the road and the delineator mows, connects and in Longitudinal direction itself behind that first mowing head located.

If there is a second mowing head is running this in mowing position again in the longitudinal direction behind the post mower, and in the transverse direction again with its mowing width - with a slight overlap - on the outside subsequently on the outside Edge of the lawn mower.

This ensures that in the length range a continuous width in the transverse direction between the guide posts consisting of the working width of the first mowing head, the post mower and of the second cutter head as well as any other mowing heads.

So when the edge trim mower hits, so especially the lawn mower, on a e.g. Guide post automatic mowing around the Bollard takes place around, the transverse position of the post mower of the Mower controlled in this way that the obstacle, e.g. the guide post, on the latitude the mower in its normal mowing position hits and that

• - in its left, the carrier vehicle facing half otherwise the free mower deflection in the desired Way around the obstacle would not take place and
• - preferably without the obstacle in the working width of the first mowing head mowing further inside protrudes into it, especially so that the width of the obstacle completely within the mowing width the mower in its normal mowing position is otherwise collisions between the first cutter head and the guide post possible would.

If the latitude range of the first and, if necessary, a second mower head is set relative to the post mower and is automatically maintained by the control system, can be used during work There are two ways to proceed: either the driver of the work vehicle steers - at fixed transverse distance of the post mower to the carrier vehicle - the carrier vehicle so, that obstacles such as the delineator as described above the mowing area of the lawn mower - of course, too in the length range is driven and mowed between such obstacles - strikes, or the driver steers the carrier vehicle according to the circumstances of the street as far to the right as possible on the edge the street, while he or a passenger according to the obstacles that appear the lateral relative distance of the post mower to carrier vehicle by means of an actuating element the control is adjusted so that the obstacles in the above Impact the width of the post mower. The location of the mowing areas of the other mowing heads adjusted analogously by the control.

The latter approach is preferable because as a result, the driver is not forced according to the transverse position of guide posts, traffic signs etc. with the work vehicle Snake lines on the street to drive and thereby the rest Endanger traffic.

The mower consists of one horizontal component, especially completely horizontal lying, support arm, which at one end swivels around a vertical Axle is mounted, which e.g. at the front end of the mower arm located. The actual mowing device Post Mower is located at the other free end of this support arm, and is e.g. from a rotating in a horizontal or approximately horizontal plane Cutting means, such as a mowing thread made of plastic or steel wire. The support arm is under supervision considered curved trained, and is in the normal mowing position, so without contact with an obstacle so that adjacent to the vertical axis of the Support arm at least one extension component transverse to the working direction and adjacent to the mower has a component at least in the working direction, whereby the support arm from behind, in particular from the outside outside, to the mowing device approaches.

As a tactile device for the detection of an incoming On the one hand, the obstacle is the forward and inward facing curved Inner edge of this support arm and on the other hand the peripheral edge of a corresponding the diameter of the cutting means, congruently arranged over the cutting means, as well as the rounded transition area between Tracer disc and inner edge.

This design is used when starting up an obstacle against that half of the front edge of the touch disk, which points to the support arm, a deflection of the entire support arm including mowing device around the vertical swivel axis, i.e. a displacement the mower first in terms of of the carrier vehicle and thus also the obstacle radially outwards, so that the mowing first is led around on the outside of the obstacle up to the front, and mowing this area, at Movement of the mower, e.g. e.g. its swivel axis, in the working direction forward. By further movement in this direction is made by sliding the Obstacle along the edge of the touch disk and then the inner edge of the support arm the mower around the rear Area of the obstacle.

By spring loading the Support arm towards normal mowing position - in its swivel position relative to the vertical swivel axis - then slides the mowing forward along the inside edge of the obstacle and mow it Free area including the area immediately in front of the obstacle before it is through further Zurückverschwenken its normal mowing position around its vertical axis takes, which is specified in particular by a stop.

It is important that the Support arm - at least at the base of the mower - essential narrower than the diameter of the mower itself is, and a maximum of about ¼ of Mower width is, since the supernatant the mower over the Inner edge of the support arm only after clearing the area in front of the obstacle, namely at the start of the obstacle being circumnavigated by the mowing device, allows.

For the same reason it is too prefer that the support arm from the mower in the normal mowing position not directly to the rear, but to the rear, i.e. below a positive angle to the working direction.

For the same reason, too in the normal mowing position the outside edge of the working area of the mower at least as far outside lie like the inside edge of the working area of the post mower, if towards this its pivot axis in the farthest with respect to the pivot axis outside located position, i.e. transversely from this pivot axis, This is the only way to ensure that no uncut areas remain between the ring-cut area around a e.g. Guide post around and the normal mowing area in the longitudinal direction between such a guide post.

This can mean, among other things, that the least possible Swing angle of the lawn mower between its normal mowing position and the maximum swivel position deflected by an obstacle at least 110 °, is preferably 130 °.

Since the mower in the normal mowing position, preferably against a related attack, by means of preload, in particular by means of spring force is, this biasing force also causes the mowing device to pivot back after clearing an obstacle in the normal mowing position.

This swiveling back can - depending on the amount of preload - so quickly that a reliable mowing of the the crop not possible anymore is. A damping device between the support arm is therefore preferred and vertical pivot axis are provided which pivot this back slowed down. The degree of damping can preferably be adjusted, in particular automatically depending on the speed of the carrier vehicle in the direction of work, which is adjusted especially during training damping as a hydraulic device by means of a hydraulic throttle possible and / or by the central control and hydraulics of the carrier vehicle a control pressure is generated, which depends on the speed and / or the engine speed of the carrier vehicle changes and to adjust the damping effect of damping device is used.

The vertical axis around which the Support arm with the mowing device the mower is pivoted, is located at the front end of a freemower arm Mower, the as usual from several articulated and in their relative position there are partial arms that can be influenced by means of hydraulic cylinders, and preferably at its front free end.

The front free end of the extension arm engages preferably as possible just above the free end on the arm of the mower, and preferably there is no part of the mower in Opposite direction to the support arm the vertical swivel axis and the mechanical one realizing it Parts, especially the cross section of the cantilever arm close to the Connection point to the support arm, out. This is necessary in order to Freemower with its swivel axis close to the outer edge of other obstacles, that doesn't mow such as the supports of crash barriers to be able to lead along on the outside.

c) working examples

An embodiment according to the invention is described in more detail below with reference to the figures. Show it:

1 : a verge mower mounted on a carrier vehicle in the mowing position, in the Top view and front view,

2 : the same mower in the transport position in top and side view, and

3 : one versus the 1 modified mower in analog views in the mowing position,

4a : the post mower without cantilever arm in supervision in normal mowing position,

4b : in a side view transverse to the direction of travel 10 considered

4c : the post mower in side view,

5 : the individual states of movement of the post mower when mowing around a post.

As the 1 - 3 show is a carrier vehicle as a work vehicle 7 used which is behind the driver's cabin 6 a loading area 5 having. On or in front of the front bumper 24 , or instead of this bumper 24 is a front frame 8th mounted on the three extension arms 3 . 4 . 152 for the inner cutter head 2a or outer cutter head 2 B or the post mower 120 are attached.

The cantilever arm 3 for the inner cutter head 2a is firmly at the extreme point 23 the right side of the offset rail 11 that are the front end of the front frame 8th forms, immovable along the offset rail 11 attached. A change from the left to the right side of the offset rail 11 is usually possible. The cantilever arm 3 is regarding the fastening point on the front frame 8th pivotable both horizontally and vertically, has a central parallelogram-like or telescopic section 17 on, and enough articulation points around the free end of the extension arm 3 attached inner cutter head 2a in the desired position and angular position with respect to the work vehicle 7 to bring and hold. The actuation of the adjustment of the cantilever arm and preferably also of the rotary drive, for example the mowing shaft of the working heads, is preferably carried out hydraulically.

How better in the front view of the 1b to recognize, the inner one, ie with respect to the street 20 and thus the work vehicle 7 Mower head working closer to the side edge of the work vehicle or the road 2a a much smaller diameter, for example due to a different mowing technique than the other mowing head 2 B , The diameter of the two cutter head housings is also different. Overall, this means - with the same mowing width - a lower weight of the mowing head 2a compared to that of the mowing head 2 B and for example driving under a guardrail, and because of the mowing head 2 B much larger lateral projection also a correspondingly larger, heavier and more stable construction of the cantilever arm 4 for the outer mowing head 2 B , both in terms of the individual segments, i.e. tower 4a on the front frame 8th , first segment 4b , second, in particular telescopic segment 4c and the associated hydraulic cylinders 4 ' . 4 '' and 4 ''' ,

In contrast to the extension arm 3 for the inner cutter head 2a is the cantilever arm 4 for the outer mowing head 2 B along the offset rail 11 of the front frame 8th in the transverse direction 19 traversable.

Like the supervision of 1a shows are the working minds 2a . 2 B positioned in the working position so that the outer working head 2 B yourself in front of the front frame 8th , at least in front of the driver's cabin 6 of the work vehicle 7 located, preferably at a right angle to the direction of travel 10 cantilever arm running in supervision 4 ,

The lateral offset of the outer cutter head 2 B is set so that the to the work vehicle 7 indicative, usually left outer edge of the mowing head 2 B just outside the road boundary posts 22 can drive past if the work vehicle 7 exactly on the edge of the street 20 or at a predetermined distance from the edge of the road 20 is controlled.

In contrast is the inner mowing head 2a adjusted so that it is longitudinally in front of the outer cutter head 2 B is located with the side offset adjusted so that the area from the outer edge of the road 20 up to the inner, i.e. left, edge of the mowing area of the outer mowing head 2 B is covered.

The height control and angular position with respect to the horizontal is controlled by both mowing heads 2a . 2 B via a scanning roller 13 respectively. 14 , preferably at the rear end of the respective mowing head, which make contact with the ground 125 can control.

The front mowing head is in the working position 2a preferably slightly oblique, i.e. not exactly at right angles to the direction of travel 10 , so that the outer end is slightly further back in the direction of travel than the inner end on which the extension arm 3 attacks.

The inner cutter head 2a can via the well-known feeler rod 12 have, which is pivotally attached in front of the front edge of the mowing head near the inner left end, and reaching an obstacle, for example the rear edge of a support post for a guardrail in the direction of travel 30 , registered. By operating the feeler bar 12 then there is an increasing folding of the mowing head 2a around the pivot point 18 on the boom arm 3 causes until the obstacle the push rod 12 no longer operated, i.e. the mowing head 2a the obstacle on the street side, for example the boundary post 22 , can happen. Immediately afterwards the mowing head works 2a back to his working position.

This feeler bar and deflection of the first front mower head 2a however, is the exception rather than the rule. Regularly expected obstacles such as the guide posts along the Roads should preferably not be in the mowing area of the front mowing head 2a still in that of the rear mowing head 2 B reach.

Instead, - how best is supervision of 1a shows - the mower 127 Post Mower 120 in the width range between these mowing heads 2a , b arranged, and also positioned in the longitudinal direction between them.

The entire mower 1 is controlled in such a way that - preferably in the normal mowing position, i.e. without hitting the obstacle - the relative position of the mowing heads remains the same 2a and 2 B to the post mower 120 a guide post, for example 22 on the mower 127 hits and from this mower 127 the immediate area around such a post 22 with continuously moving work vehicle 7 is mowed around, as in the 5 presented in detail.

How 1b shows is the post mower 120 on a cantilever arm 152 attached, which consists of two or more arms 152a , b can exist, which are articulated and adjustable by means of hydraulic cylinders in their relative position to each other and / or being at the rear end of the extension arm about a vertical folding axis 155 is pivotable. At the front end of the cantilever arm is the crescent-shaped support arm 126 about a vertical pivot axis 150 on the boom arm 152 attached, which also allows a height adjustment, preferably under the vertical axis 150 the post mower 120 by means of a skid 124 or a tracer roller sits on the surface.

At the free end of the support arm 126 is the mower 127 with a circular effective area when viewed from above due to a rotating cutting thread as cutting means 129 arranged. Details are based on the 4 and 5 explained.

The 1a and 1b show that the cantilever arm 152 by means of a sled 149 or also a fixed mounting shoe on the front frame 8th , especially its offset rail 11 fixed, or movably attached. In the 1a and 1b this is opposite the attachment point of the attachment shoe 26 for the first mowing head 2a lying further inside, towards the center of the vehicle, between the fastening shoe 26 and the sliding shoe 25 for the second mowing head 2 B the case. Conversely, the attachment of this boom arm 152 also be given in the outermost right position on the front frame, in relation to that which is offset somewhat further inward, in particular directly on the slide 149 subsequent, fastening shoe 26 for the front mowing head 2a ,

In contrast, the analog ones differ 3a . b in that here the cantilever arm 152 ' for the verge mower 120 not directly on the front frame 8th is attached, but on the boom arm 3 of the first mowing head 2a , ie branches off from it, and in particular in relation to it in its relative position again - like the partial arms of the extension arm otherwise - can be brought into the desired relative position by means of hydraulic cylinders.

Over the boom arm 152 So in addition to the angular position of the boom arm relative to the direction of travel, the height of the post mower can also be specified, and in particular - as with the other mowing heads - a move from the in 1 and 3 shown mowing position can be reached in the transport position.

The 2a and 2 B show the mower 1 in the transport position: the fastening shoe 26 with the help of the boom 3 of the inner cutter head 2a firmly on the offset rail 11 is still in the rightmost position on the offset rail 11 ,

The sliding shoe 25 on which the cantilever arm 4 for the outer mowing head 2 B is fixed, is in the transport position preferably in the middle position with respect to the offset rail 11 and thus the vehicle 7 driven while in the mowing position of the 1a respectively. 1b in addition to the middle position shown there, also a positioning on the other, i.e. from the fastening shoe 23 opposite, left end of the offset rail is possible for better weight distribution if this is the length of the cantilever arm 4 allows.

In the transport position of the 2a . 2 B is the outer cutter head 2 B on the loading area 5 that are usually behind the cab 6 of the vehicle 7 is arranged, filed with alignment of the mowing shaft of this mowing head 2 B preferably in the direction of travel 10 and the middle or on one side of the bed. The remaining areas then remain as freely available loading space. The cantilever arm 4 extends preferably also against the direction of travel 10 running across the middle of the cab from the front front frame 8th to on the rear bed 5 deposited mowing head 2 B with the boom in the middle 4 attacks.

The inner cutter head 2a is, however, on a bracket provided for this purpose, which is part of the front frame 8th is as close as possible in front of the front frame 8th held. A certain minimum distance is necessary, which is due to the front overhang of the sliding shoe 25 in front of the front rail 11 is conditioned. The cantilever arm 3 is with regard to its middle section 17 retracted, and extends partially in the direction of travel 10 to the front and the other part across the direction of travel also in front of the front rail 11 and thus parallel above the mowing head 2a , which also extends transversely with the extension of its mowing shaft, i.e. at right angles to the direction of travel 10 , is arranged, and its articulation point 18a opposite the free front end of the cantilever arm 3 is at the left end of the mowing head.

So that is also in this transport position 2 the inner cutter head 2a so in front of the work vehicle 7 that the feeler rod 12 even before the front of this mowing head 2a located, and also in the Transport position could still be active as a safety feature, but not to avoid an obstacle.

In the transport position, this is the weight of the two mowing heads 2a . 2 B on the front and rear end of the work vehicle 7 distributed, and also the center of gravity of the inner and front mower head in transport position 2a close to the front offset rail 11 and this front mowing head 2a can by the driver of the vehicle 7 can still be clearly seen during transport and my maneuvering can be monitored.

The Post Freemower 120 is also in the front area in the transport position, i.e. close to the front frame 8th , filed.

In order not to obstruct the driver's view, as in the supervision of the 2 B recognizable - the crescent-shaped support arm 26 around the front of the tower 4a of the cantilever arm 4 lying around with the mower 25 on the left side of the tower and the outrigger arm 152 right of the tower, so not in the driver's field of vision.

On the top of the sliding shoe 25 for the support arm 4 special, form-fitting storage devices can be designed for the post mower.

The cantilever arm 152 can then be relatively high on the right side of the front frame without any significant interference, for example up to the upper edge of the driver's cabin 6 , in which the arms 152a, b point approximately vertically upwards with their pivot point in between as the approximately highest point of the extension arm 152 in this transport position.

The 4a and b show details of the post mower 120 in the supervision as well as in the side view, whereby in the supervision the 4a the cantilever arm carrying the post mower 152 was omitted for reasons of clarity.

Inscribed 10 the direction of travel of the carrier vehicle, not shown, ie the working direction, and 19 the transverse direction perpendicular to this. Also regarding the post mower 120 in the 4a The terms "outside and inside" refer to this work vehicle 7 , "outside" that of the carrier vehicle, and thus in the normal mowing position of the 4a also with respect to the vertical swivel axis 150 , the side lying on the outside, while "inside" refers to the carrier vehicle 7 and thus the swivel axis 150 indicative side means.

The Post Freemower 120 consists essentially of the curved, horizontal support arm extending over an angular range of preferably at least 90 ° 126 at its front free end into the actual mower 127 transforms. This exists - as best with reference to the 4b recognizable - from a vertically standing, rotatably drivable and thus rotating shaft 136 , on which at least one radially projecting cutting means, shown here as a cutting thread 129 , is attached. As is known per se, the crop is separated by the rapid rotation of the mowing line.

Above the mowing line 129 there is a feeler disc, also horizontally and parallel to the plane of rotation of the cutting thread 130 whose diameter - as in 4a recognizable - the same or slightly larger than the cutting circle of the mowing line 129 is.

The drivable shaft 136 protrudes down from a hydraulic motor 128 , which is located above the button 130 located, and firmly at the front free end of the support arm 126 is arranged. The tactile disc 130 is preferably attached rotatable about the vertical axis for this purpose.

Inside the support arm, which is preferably designed as a hollow profile 126 run hydraulic lines 131 . 132 to supply the motor 128 , and from there (no longer shown) along the extension arm 152 to the work vehicle 7 , for example the front frame there 8th , and the central oil supply for the mower located there.

At the other end of the support arm 126 this is about a vertical pivot axis 150 at the free front end of the cantilever arm 152 attached, which is able to pivot axis 150 always set vertically.

In an extension of the vertical swivel axis 150 is located below the support arm 126 a skid 124 to lie on the ground 125 and thus the height setting of the mower 127 , which specifies such a height that the cutting wire 129 just above the underground 125 is located, for which preferably a height adjustment between the skid 124 and the rest of the mower is present, for example via an articulated connection of the skid 124 at its front end opposite the socket which is the vertical pivot axis 150 realized and a rear adjustment screw facing away from it.

Like the supervision of 4a shows, in particular the cross section of the support arm widens 126 which in its main part has a constant width of less than ¼ of the diameter of the mowing device 127 has, at its end towards the mowing device in the form of a club, so that its outer edges, in particular its inner edge 123 , especially when viewed from the top, without kinks, in the outer circumference of the support arm 126 lying touch disk 130 transforms. Because especially along the inside edge 123 of the support arm 126 an obstacle such as a post 22 must slide along, this inner edge, preferably the outer edge, with a sliding surface 122 , such as a plastic strip made of Teflon or another lubricious plastic.

In the in 4a and also 5a shown normal mowing position, so without contact of the Pfos th-free mower 120 with an obstacle such as a delineator 22 , is the curved support arm 126 with its concave inner edge when viewed from above 123 arranged inwards towards the front. From the swivel axis 150 the support arm strives 126 thus in the transverse direction outwards and curves forward in an arc, and thus strives from behind or diagonally outwards towards the back of the center of the mowing device 127 , namely their vertical wave 136 and the tactile disc stored there 130 ,

The support arm is in this normal mowing position 126 by means of the force of a spring 142 in 4a pressed counterclockwise against a stop, not shown, in which the spring 142 a touch roller 143 acts on which on a cam 133 rolls off, which rotates with the support arm 126 connected about the pivot axis 150 rotates when the support arm 126 counter to the force of this preload clockwise around the swivel axis 150 is pivoted around a constant counterforce - regardless of the deflection - on the spring 142 to effect.

As the 4a and 4b show, there is the cam 133 preferably from the concentric around the pivot axis 150 protruding edge of a cup-shaped cam element, the height of the edge varying over the circumference. The tracer roller 143 is rotated around a horizontal axis and pressed from above against the edge of the cup-shaped cam disc by means of the coil spring, which also acts vertically from top to bottom 142 , which is guided in a corresponding housing and the preload using a clamping screw 144 can be set, which compared to this housing 141 is screwable.

A purely radial action of the sensing roller against the outer edge of a non-circular cam would then be possible, in which case the housing of the spring 142 radially just behind the support arm 126 should protrude outwards.

At one point on the circumference of the cam 133 the transition between the highest and the lowest point of the contour takes place in the form of a paragraph, which also acts as a stop 147 for the tracer roller 143 serves the normal mowing position according to 4a and 4b pretends.

The 5 show the process of mowing, i.e. free mowing, of a guide post, for example 22 or other post-like obstacle:
By moving the post mower forward 120 this hits the guide post 22 the contact point for the proper functioning of the post mower within the working direction 10 foremost point 140 the contour of the touch disk 130 must lie.

The one through the guide post 22 The resistance offered is large enough to keep the post mower - which is switched on for the entire time - against the force of the spring 42 around the pivot axis 150 deflect around clockwise. This causes the guide post to slide ( 5b ) on the inside of the contour of the touch disk 130 along. Until the innermost point 139 this contour is achieved by pivoting the support arm 126 the mower 127 moved further outwards.

In the further course the post slides 22 along the transition between the tactile disc 130 and support arm 126 and its inner edge 123 , which means that the mower means the area outside the post 22 runs over and mows, and ultimately also the area in the working direction before posting 22 ( 5c ) due to the fact that the mower 127 as a widened head of the support arm 126 from the outside in front of the posts 22 arrives due to the restoring force of the spring 42 until then a back-pivoting movement of the support arm 26 clockwise around the swivel axis 150 has caused under constant investment of the post 22 to the probe 130 or inner edge 123 of the support arm 126 ,

In the further course ( 5d ) by moving the post mower forward 120 , so its pivot axis 150 , in the working direction 10 the support arm 126 through the post 22 that continues along the inside edge 123 of the support arm 126 slides along, again deflected clockwise until ( 5e ) the point of contact between posts 22 and inside edge 123 in the direction of travel 10 considers the rearmost point of this inner edge 123 forms.

By further forward movement of the post mower 120 the pivoting movement of the support arm 126 clockwise around the pivot axis 150 continued, the post slides 22 along the inside edge 123 back towards the probe 130 ( 5f ) and then along their contours ( 5g ), with the touch disk 130 and with it the mowing device 127 back along the outside of the post 22 , moved around behind the back and finally ( 5a ) by the restoring force of the spring 42 along the inner side surface of the post 22 can move on its front.

As soon as the post mower is out of contact with the post 22 device, the mower is driven by the force of the spring 142 counterclockwise ( 5h ) swung back into its starting position (the normal mowing position).

1

Edge trim mower

2a, b

Mowing head (inner / outer

ßerer)

3

Cantilever arm ( 2a )

4

Cantilever arm ( 2 B )

5

load area

6

cab

7

working vehicle

8th

front frame

9

attachment point

10

direction of travel

11

offset rail

12

sensing rod

13

scanning roller

14

scanning roller

16a, b

mowing shaft

17

telescoping section

18

articulation

19

transversely

20

road

21

edge strips

22

delineators

23

outer point

24

bumper

25

sliding shoe

26

mounting Shoe

27

storage rail

120

Post free mower

122

sliding lining

123

inner edge

124

skid

125

underground

126

Beam

127

mowing

128

hydraulic motor

129

nylon line

130

contact plate

131

hydraulic line

132

hydraulic line

133

cam

135

screw

136

wave

137

carrier

139

innerster Point

140

vorderster Point

141

casing

142

feather

143

follower roll

144

clamping screw

145

stamp

146

ball-bearing

147

attack

148

Hydraulic cylinder

149

carriage

150

swivel axis

151

intermediate angle

152

Auslegearm

154

intermediate angle

155

folding axis

Claims (44)

Edge trim mower with - at least one first mowing head ( 2a ), which on a first boom arm ( 3 ) is attached, - whereby the extension arm ( 3 ) on that of the mowing head ( 2a ) opposite end on a fastening unit ( 8th ) is arranged, the attachment to a carrier vehicle ( 7 ) serves and - a post mower ( 120 ), characterized in that the post mower ( 120 ) directly or indirectly on the same fastening unit ( 8th ) is arranged. Mower according to claim 1, characterized in that the post mower ( 120 ) at the free end of a mower arm ( 152 ) is arranged, which is in its normal mowing position opposite the direction of travel ( 10 ) of the carrier vehicle ( 7 ) protrudes diagonally forward with a front mower and protrudes diagonally back with a rear mower. Mower according to one of the preceding claims, characterized in that the mower arm ( 152 ) especially in relation to the fastening unit ( 8th ) at its rear end around a vertical folding axis ( 155 . 155 ' ), especially by means of a hydraulic cylinder ( 147 ), in the supervision in a defined angular position in relation to the direction of travel ( 10 ) relocatable and in particular in one of the folding axis ( 150 ) inward, ie away from the edge strip, projecting transport position is pivotable. Mower according to one of the preceding claims, characterized in that the mower arm ( 152 ) on a sledge ( 149 ) is arranged, which is opposite the fastening unit ( 8th ), especially a cross rail ( 11 ) the fastening unit ( 8th ), across the working direction ( 10 ) is movable and / or fixable. Mower according to one of the preceding claims, characterized in that the freemower delivery office ( 152 ) on the fastening shoe ( 26 ) or the extension arm ( 3 ) of the first mowing head ( 2a ), especially in the case of a first and second mowing head that of the first mowing head mowing further inwards and forwards ( 2a ) is attached. Mower according to one of the preceding claims, characterized in that the drive of the post mower ( 120 ) is operated with the same type of energy as the at least one first mowing head ( 2a ), especially by means of hydraulic medium, and the energy supply for the post mower ( 120 ) together with the energy supply to the at least first mowing head ( 2a ) is switched on and off together. Mower according to one of the preceding claims, characterized in that a central control for the entire mower including at least a first mowing head ( 2a ) and the post mower ( 120 ), is available, and individual functions, in particular the height adjustment, by means of a common actuating element can be operated together. Mower according to one of the preceding claims, characterized in that in the normal mowing position the mowing width of the post mower ( 120 ) itself - possibly with a slight overlap in the transverse direction ( 19 ) - laterally on the outside to the working width of the at least one first mowing head ( 2a ) connects. Mower according to one of the preceding claims, wherein the mower has a second mowing head ( 2 B ) includes the on a second extension arm ( 4 ) is fixed and in the normal mowing position with its working width in the transverse direction ( 19 ) laterally - especially without overlap - outside the working width of the first mowing head is characterized in that the post mower ( 120 ) is arranged so that its working width is transverse ( 19 ) between the working width of the first ( 2a ) and second ( 2 B ) The mowing head - if necessary with a slight lateral overlap - is in the normal mowing position. Post Freemower ( 120 ), in particular as part of a mower according to one of the preceding claims, with - a mowing device ( 127 ) at the free end of a support arm ( 126 ) is arranged, - with the support arm ( 126 ) around a vertical axis ( 150 ) is pivotably arranged on a suspension element and - the suspension arm ( 126 ) is curved in the top view so that it is in the normal mowing position in the on the mowing device ( 127 ) adjacent section an extension component in the direction of travel ( 10 ) and in the section adjacent to the suspension element an extension component transverse to the direction of travel ( 10 ), characterized in that the support arm ( 126 ) including the mowing device ( 127 ) in the normal mowing position against the direction of travel ( 10 ) is biased into a defined swivel position, in particular against a stop, by adjusting means in the normal mowing position. Post Freemower ( 120 ), in particular as part of a mower according to one of the preceding claims, with a mowing device ( 127 ) at the free end of a support arm ( 126 ) is arranged, - with the support arm ( 126 ) around a vertical axis ( 150 ) is pivotably arranged on a suspension element, and - the suspension arm ( 126 ) is curved in the top view so that it is in the normal mowing position in the on the mowing device ( 127 ) adjacent section an extension component in the direction of travel ( 10 ) and in the section adjacent to the suspension element an extension component transverse to the direction of travel ( 10 ), characterized in that the mowing device ( 127 ) Means of registration ( 130 ) to detect an obstacle in the direction of travel ( 10 ) before the mowing device ( 127 ) includes. Post Freemower ( 120 ), in particular as part of a mower according to one of the preceding claims, with a mowing device ( 127 ) at the free end of a support arm ( 126 ) is arranged, - with the support arm ( 126 ) around a vertical axis ( 150 ) is pivotably arranged on a suspension element, and - the suspension arm ( 126 ) is curved in the top view so that it is in the normal mowing position in the on the mowing device ( 127 ) adjacent section an extension component in the direction of travel ( 10 ) and in the section adjacent to the suspension element an extension component transverse to the direction of travel ( 10 ), characterized in that the support arm ( 126 ) at least at the base of the mowing device ( 127 ) in the transverse direction ( 19 ) much narrower, in particular a maximum of ¼ as wide as the mowing device ( 127 ), is trained. Post Freemower ( 120 ), in particular as part of a mower according to one of the preceding claims, with - a mowing device ( 127 ) at the free end of a support arm ( 126 ) is arranged, - with the support arm ( 126 ) around a vertical axis ( 150 ) is pivotably arranged on a suspension element, and - the suspension arm ( 126 ) is curved in the top view so that it is in the normal mowing position in the on the mowing device ( 127 ) adjacent section an extension component in the direction of travel ( 10 ) and in the section adjacent to the suspension element an extension component transverse to the direction of travel ( 10 ), characterized in that the support arm ( 126 ) in the normal mowing position in the direction of travel ( 10 ) on the mowing device ( 127 ) meets or at a positive intermediate angle, i.e. pointing away from the carrier vehicle from the working direction ( 154 ). Post mower, according to one of the preceding claims, characterized in that the support arm in its transverse distance to the carrier vehicle ( 7 ) is adjustable. Post mower, according to one of the preceding claims, characterized in that in the normal mowing position the outer edge the working area of the post mower ( 120 ) is at least as far outside as the inside edge of the working area of the post mower ( 120 ) if this is opposite the swivel axis ( 150 ) of the support arm ( 126 ) in the outermost position, i.e. at right angles to the direction of travel ( 10 ). Post mower according to one of the preceding claims, characterized in that in the normal mowing position the support arm ( 126 ) from the swivel axis ( 150 ) in the adjacent area at right angles to the direction of travel ( 10 ) from the swivel axis ( 150 ) strives and against the mowing device ( 127 ) at a positive angle ( 151 ) of at least 10 °, in particular at least 30 °, to the direction of travel ( 10 ) opens from the outside. Post mower, according to one of the preceding claims, characterized in that the support arm ( 126 ) has no kink in the course of its inner edge. Post mower according to one of the preceding claims, characterized in that the width of the working area of the mowing device (viewed in the direction of travel) 127 ) is chosen so large that the swivel angle of the mower ( 120 ) between the normal mowing position and the maximum deflection against the normal mowing position by an obstacle is at least 110 °, in particular at least 130 °. Post mower, according to one of the preceding claims, characterized in that a damping device after deflection of the support arm ( 126 ) from the normal mowing position due to an obstacle after the obstacle has been cleared, the swinging arm ( 126 ) slowed down to the normal mowing position. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the section of the support arm ( 126 ) with the extension component in the working direction against the mower ( 127 ) connects. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) of the mower ( 127 ) subsequent section of the support arm ( 126 ) in the working direction or at a positive intermediate angle pointing away from the suspension element from the working direction ( 154 ) from the mower ( 127 ) strives. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the means of registration ( 130 ) and the actuating means are only mechanically linked to one another. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the support arm ( 126 ) viewed from the top, especially in the area directly on the mower ( 127 ) adjacent area, significantly narrower, in particular at least by a factor of three, in particular at least a factor of five, is narrower than the diameter of the mower ( 127 ). Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) Adjusting means for setting the transverse distance between the mower ( 127 ) and the vertical axis, especially by adjusting the swivel position of the support arm ( 126 ) around the vertical axis, depending on the detection state of the detection means ( 130 ) are provided. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the support arm ( 126 ) has a substantially horizontal section. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) viewed from above, the support arm ( 126 ), preferably in the working direction, is curved. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the detection means, tactile means ( 126 . 130 ) to scan the mowing area for obstacles. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the scanning means a touch disk ( 130 ) exhibit. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the scanning means a probe arm ( 126 ) exhibit. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the support arm ( 126 ) the probe arm ( 126 ) is. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the actuating means the mower ( 127 ) in the non-detection state of an obstacle in the normal position. Mower according to one of the preceding Claims, characterized in that the post mower ( 120 ) the mower ( 127 ) together with the support arm ( 126 ) from the pre-tensioning means ( 140 ) is biased in a swivel direction of the support arm ( 126 ) in sync with the direction of work. Mower according to one of the preceding claims, characterized by the post mower ( 120 ) Preloading means ( 140 ) for pre-tensioning the mower ( 127 ) in the normal position. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the preload is adjustable. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the actuating means a gear or a cam ( 133 ) exhibit. Mower according to one of the preceding claims, characterized by the post mower ( 120 ) a tour ( 124 ) for setting a predetermined distance of the mower ( 127 ) from the floor ( 125 ) is available. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) guiding a sledge ( 124 ) or has a leadership role. Mower according to one of the preceding claims, characterized in that the post mower ( 120 ) the mower ( 127 ) rotating, in particular horizontally rotating, cutting means ( 129 ), preferably a mowing thread ( 129 ), Mowing knife or a mower disc. Method for clearing an obstacle, in particular a guide post, by means of a mowing device with a mowing device which is brought straight up against the obstacle in the working direction ( 127 ), which is pivotally mounted on a vertical axis with a curved support arm that is open to the front in the working direction and is obliquely in front of the vertical axis in the normal position, before contacting the obstacle, with the following steps: - contacting the detection means ( 130 ) the mowing device through the obstacle at a point which is offset from the foremost point of the contour of the detection means to the inside, - further mowing device in the working direction against the obstacle and thereby pivoting the support arm against the working direction, so that the mowing device ( 127 ) is guided past the obstacle at the front end of the support arm, - contacting the forward-facing inner contour of the concave support arm ( 126 ) due to the obstacle and the contact point along the support arm from the mower ( 127 ) away while swiveling the support arm again ( 126 ) against the working direction until the mower ( 127 ) is drawn around the back of the obstacle and can move forward on the inside of the obstacle while simultaneously pivoting the support arm ( 126 ) forward in the working direction and - swiveling the mower deck outwards ( 127 ) along the front of the obstacle until mower ( 127 ) and support arm ( 126 ) have returned to the normal position. Method for mowing an edge strip next to a carrier vehicle ( 7 ) with a mower attached to the carrier vehicle, which - at least one first mowing head ( 2a ) on a first extension arm ( 3 ) and - at least one post mower ( 120 ) on a mower arm ( 126 ), characterized in that - when working as a normal mowing position, the transverse distance of the first mowing head ( 2a ) relative to the carrier vehicle ( 7 ) is set manually by the operator, - the transverse distance of the post mower ( 120 ) to the first mowing head ( 2a ) reproducible and adjustable automatically in the normal mowing position. A method according to claim 40, characterized in that the working area of the first mowing head ( 2a ) directly inside, i.e. towards the road, the obstacles, especially the guide posts ( 22 ) is set as the transverse distance in the edge strip. Method according to claim 40 or 41, characterized in that the mowing device has a second mowing head ( 2 B ) on a second extension arm ( 4 ) and the working area of the second mowing head ( 2 B ) in the normal mowing position relative to the first mowing head ( 2a ) is set so that it is transversely spaced outside, in between that the obstacles present in the edge strip, in particular guide posts ( 22 ), can be passed through. Method for mowing an edge strip next to a carrier vehicle with a mower attached to the carrier vehicle, which comprises - at least a first mowing head on a first cantilever arm and - at least one post-mower on a free-mower support arm, characterized in that the width of the working area of the post- Freimä hers ( 120 ) at least as large as the distance between the work areas of the first ( 2a ) and second ( 2 B ) Mower head is set in the normal mowing position. Method for mowing an edge strip next to a carrier vehicle ( 7 ) with a mower attached to the carrier vehicle, which - at least one first mowing head ( 2a ) on a first extension arm ( 3 ) and - at least one post mower ( 120 ) on a mower arm ( 126 ), characterized in that the transverse position of the mower during mowing is controlled so that a post-shaped obstacle on the carrier vehicle ( 7 ) facing half of the front edge of the mowing device ( 127 post mower () 120 ) and does not protrude above the side edge facing the carrier vehicle.