DE20211861U1 - mower - Google Patents

Description

Mower

The invention relates to a mowing device with a boom extending laterally from a vehicle in the operating position according to the preamble of claim 1.

Mowers of this type, particularly those used to maintain roadsides and assigned to a front area of the vehicle for this purpose, should be able to adopt different working positions in order to adapt to obstacles that arise, in particular guide posts or barriers. It is often desirable to be able to work on a green strip both in front of an obstacle line, for example in front of a guard rail, a hedge or a row of guide posts (so-called first cut), and behind it (so-called second cut).

For this purpose, it is known to arrange a multi-jointed boom on the vehicle, which comprises several areas that can move relative to each other around horizontal axes, so that by means of pivoting movements around these axes, parts of the boom with a mowing head attached to it can be lifted and raised over the row of obstacles. This requires a considerable amount of drive elements.

ϕ ϕ φφ Φ· ϕ ϕ ϕ ϕ ϕ ϕ ϕ ϕ ϕ · ϕ ϕ · · ϕ ϕ ϕ ϕ ϕ
ϕ ϕ _# · ϕ ϕ ϕ
ϕ ϕ · ϕ i
φ ·
ϕ ϕ ϕ ϕ
φ φ φ φ φ ϕ ϕ ϕ ϕ ϕ φ φ φ φ φ φ φ φ φ φ ·

required, which must cause the boom parts to move against each other on the individual axles. This involves large-scale hydraulics, which requires a correspondingly large number of heavy components. In addition, such a boom has a considerable vertical extension even in the transport position in which it is arranged in front of the front end of the vehicle, which limits the driver's view.

The invention is based on the problem of simplifying mowers which can be used for a first and a second cut while avoiding the disadvantages mentioned above.

The invention solves this problem by a mowing device having the features of claim 1. With regard to advantageous embodiments, reference is made to the dependent claims 2 to 6.

According to the invention, according to claim 1, the purely horizontal displacement minimizes the effort required to move the mowing head between the working position for the first and second cut. This results in very little effort for the structural design of the hydraulics. The energy required to move the mowing head is minimized. At the same time, the structural design of the boom itself can be simplified.

If it is designed like a yoke and leaves the clear height of the guide posts free underneath, the mowing head can be swivelled around these without performing a lifting movement. At the same time, the height of the boom can be low so that it does not represent a significant obstruction to visibility even when mounted on the front of the vehicle.

· * * * 11

By using the same mowing head for the first and second cut, the changeover effort between the first and second cut is minimized. There is no need to keep a second mowing head, which reduces the construction effort.

If the mowing head is particularly advantageously height-adjustable, it can be adapted to the ground topography. The height adjustment can either be set by the operator or, in a floating position, can be carried out automatically by the mowing head resting on the ground. However, it is still possible to move between the working positions for the first and second cut using a purely horizontal movement.

Further advantages and features of the invention will become apparent from an embodiment of the subject matter of the invention shown in the drawing and described below.

In the drawing shows:

Fig. 1 is a perspective view of the front of a vehicle

tool-mounted boom with mowing head attached to it in working position for the second cut behind a row of guide posts,

Fig. 2 a view of the parts according to Fig. 1 from the front in working position

Preparation for the second cut behind a row of guide posts.

The mowing device shown in Fig. 1 and designated as 1 comprises at least one mowing head 2, which is mounted on the front of a working vehicle 3, which is only indicated schematically. For this purpose, a horizontal

· III · · # ·

A horizontal rail 4 is provided on which a boom 5, which supports the mowing head 2, is arranged so that it can move along the arrow 6. The ability of the boom 5 to move relative to the vehicle 3 is not mandatory, but it does enable mowing of both the right and left edges of the road as seen from the driver. The vehicle 3 can be a self-propelled vehicle, such as a truck, as in the exemplary embodiment, or a trailer vehicle or a manually pulled or pushed vehicle. Depending on the vehicle design, the boom 5 can also be provided in the side or rear area of the vehicle.

The boom 5 comprises several sections 9, 10, 11 which can be pivoted relative to one another about vertical axes 7, 8. The vehicle-side section 9 is slidably mounted on the horizontal rail 4 and extends from this perpendicular to the course of the horizontal rail 4 in the direction of travel F. The middle section 10 can be pivoted on the axis 8 relative to the first section and is designed in the manner of a yoke at least in an area which can extend transversely. In the working position, its upper cross member 12 leaves a clear height 13 relative to the ground which exceeds the height 14 of a standardized guide post 15. Because the middle section 10 of the boom 5 can pivot about the axis 8 relative to the vehicle 3, the mowing head 2 can reach out to different distances with the vehicle in the same position. The mowing head itself is attached to the outer section 11, which can be pivoted relative to the middle section about the additional vertical axis 7. The mowing head 2 can therefore always be held parallel to the direction of travel F even when the middle section 10 is at different positions and can therefore always work in the same way.

For carrying out a so-called first cut, i.e. mowing in a first working position in the area close to a lateral road edge, the boom 5 can be held with its middle section 10 almost parallel to the direction of travel F.

so that the mowing head 2 only extends slightly. To assist in carrying out the mowing function close to the vehicle 3, the first section 9 on the horizontal rail 4 can also be displaced further in the direction of a vertical vehicle longitudinal center plane 16.

In order to enable the second cut behind a row of guide posts 15, hedges, crash barriers or other obstacles in the second working position, the middle area 10 is pivoted out about the axis 8. At the same time, the mowing head 2 can be pivoted in the opposite direction about the axis 7 in order to regain its original orientation parallel to the direction of travel F. This type of pivoting can be carried out purely by horizontal movement about the axes 7, 8 mentioned. The guide posts 15 can then be overlapped by the upper cross member 12 of the yoke during pivoting and in particular during the second cut. The same mowing head 2 as for the first cut can be used. For the second cut, there is usually no longer any need to feel for obstacles. A feeler element 19 therefore does not have to be replaced. Because the pivot axis 8 for the front area 10 of the mowing head is vertical, there is no danger of parts of the boom colliding with a row of obstacles even when the mowing head is moved close to this row of obstacles. The mowing result is therefore satisfactory in the second cut even in the vicinity of the row of obstacles 15 due to a wide mown strip that is in close contact with this.

In order to compensate for uneven terrain, an articulated parallelogram 17 can also be provided. This can be used to adjust the height of the mowing head 2. The height variability can either be adjusted from the vehicle 3, for example if the mowing head 2 is to be kept close to the ground, or it can be provided to guide the mowing head 2 over the ground in a tactile manner and thus actuate the articulated parallelogram 17, which can be used, for example,

when sloping slopes, such as noise barriers, are encountered, it can be pivoted upwards about the axes 18. By means of stops or other suitable measures, it can be ensured that even in the lowest position of the parallelogram 17, the clear height 13 of the cross member 12 remains sufficient to be able to overrun the guide post 15.

Claims (6)

1. Mower ( 1 ) with a boom ( 5 ) extending laterally outwards from a vehicle ( 3 ) in the operating position, on which a mowing head ( 2 ) can be held, wherein the boom ( 5 ) is adjustable in such a way that in a first working position it can work an area between the vehicle and obstacles on the edge, such as guide posts ( 15 ) and/or crash barriers, and in a second working position it reaches behind the obstacles on the edge and can work the shadow area of the obstacles there in a so-called second cut, characterized in that the boom ( 5 ) can be displaced between the first and second working positions solely by movement in a horizontal plane (H). 2. Mower according to claim 1, characterized in that the boom ( 5 ) comprises a transversely extending region which is designed in the manner of a yoke and is open downwards, the upper transverse boundary ( 12 ) of the yoke having a clear height ( 13 ) relative to the ground which exceeds the height ( 14 ) of conventional guide posts ( 15 ). 3. Mower according to one of claims 1 or 2, characterized in that the first and the second cut can be carried out with the same mowing head ( 2 ). 4. Mower according to one of claims 1 to 3, characterized in that the mowing head ( 2 ) can be held on the boom ( 5 ) via a section ( 11 ) comprising a vertical pivot axis ( 7 ). 5. Device according to one of claims 1 to 4, characterized in that the mowing head ( 2 ) is height-variable in the operating position. 6. Device according to claim 5, characterized in that the boom ( 5 ) comprises at least one articulated parallelogram ( 17 ).