DE202013012325U1 - Ground milling machine, in particular road cold milling machine, with visibility optimized rear area - Google Patents

Abstract

Ground milling machine (1), in particular road cold milling machine, for milling of soil material (10) with - a machine frame (3), - a zero side (B), - one on the rear of the machine (13) arranged control station (36) with a from the machine center in the direction of Zero side (B) offset driver's seat (2), wherein the driver's seat (2) between a transport position for the transport operation and a working position for the working operation of the ground milling machine (1) is adjustable, - at the rear of the machine (13) arranged milling drum (7), and - A milling drum box (9) in which the milling drum (7) is rotatably mounted about a rotation axis (8), with a height-adjustable scraper blade (11) by a scraper guide (12a, 12b) guided between a superscoring maintenance position and a lowered working position is movable, wherein the upper part of the scraper guide (12 a) in the working direction (a) behind the driver's seat (2) on the machine frame (3) i st and vertically rises, characterized in that the upper part of the scraper guide (12a) is formed on the Bodenfräsmaschine (1) that a transverse to the working direction (a) from the zero side (B) to a guide wall (38) of the upper Part of the scraper guide (12a) out open Sichtauslassung (30) is present, through which the driver's seat (2) in the working direction (a) behind the Bodenfräsmaschine (1) and on the zero side (B) lying milling edge (43) is visible ,

Description

The invention relates to a ground milling machine, in particular a road cold milling machine, as it is often used in road or road construction. Such ground milling machines enable the milling and / or crushing and / or mixing of soil material. More particularly, the invention relates to a tail rotor tiller, especially small or compact tiller.

Generic ground milling machines have a machine frame, ships, a control station with a driver's seat, a drive motor (usually an internal combustion engine) and often also a discharge belt for milled material. Furthermore, such Bodenfräsmaschinen include a mounted, for example, at the rear of the machine Fräswalzenkasten in which a milling drum, which is equipped on its surface with a plurality of chisel devices, is mounted rotatably about a horizontal and transverse to the direction of rotation axis. During operation of the ground milling machine, the rotating milling drum drives the chisel devices at an adjustable milling depth into the ground to be milled and mills it. Generic ground milling machines are, for example DE 20 2011 105 309 U1 . DE 10 2012 012 607.7 and DE 10 2012 018 918.4 known, which are hereby incorporated by reference.

The milling drum generic ground milling machines is typically arranged offset to one of the two longitudinal sides of the machine frame, so that it is closer to a front side to one side than with the other end side to the other side. This side of the ground milling machine, referred to as the zero side, designates the side on which, due to this offset of the milling drum, it can be milled closer to side obstacles, such as curbs, house walls, etc. On the zero side of the ground milling machine, it is thus possible to mill ground material especially close to the edge of the machine frame. A manual post-processing of the milling edge can be omitted in most cases or is only necessary to a small extent. Especially with near-edge milling work, it is particularly important that the driver of the ground milling machine can see the work area as well as possible, for example, to prevent damage to the machine and in the working environment.

 In order to leave behind the ground milling machine in the working direction a clean milling bed, generic ground milling machines include a height-adjustable scraper blade which forms the rear wall in the direction of the Fräswalzenkastens and guided by a scraper guide between a superscript maintenance position and a lowered working position is movable. The scraper blade is in particular displaceable and can be performed either scratching directly on the bottom of the milling bed, with no milled material remains in the milling track, or be set slightly higher to leave a desired amount of milled material in the milling bed. During operation of the ground milling machine, that is, while ground material is being milled by the ground milling machine, the scraper blade is in working position on or just above the surface of the milling bed. The scraper blade is lowered in working position substantially, the exact position varies slightly depending on the desired result, the use of different Fräswalzentypen or different set routing depths in their height adjustment. In addition, the height adjustability of the wiper blade is also used to provide access to the interior of the Fräswalzenkastens for maintenance. The maintenance position is the position of the scraper blade that is substantially vertically upwards, relative to the working position, and which provides access to the interior of the milling drum box. The scraper blade is usually fixed in the maintenance position for safety reasons. Adjusting the scraper blade to the maintenance position allows free access to the milling drum, chisel devices and other equipment inside the milling drum box for maintenance personnel. After completion of the maintenance work, the fixation is released and the scraper blade can be moved back to its working position, after which the working operation can be resumed.

In order to realize the height adjustability of the wiper blade and in particular the height adjustment to the maintenance position, generic ground milling machines include a height adjustment device, for example, with a hydraulic cylinder which is attached to the wiper blade and can adjust this in the vertical direction. The hydraulic cylinder is usually arranged vertically above the scraper blade and pulls this substantially vertically upwards or shifts it vertically downwards. Furthermore, a scraper blade guide or scraper guide is present, whose essential task lies in a defined guidance of the scraper blade between the working position and the maintenance position on the ground milling machine. The scraper guide often includes a lower part and an upper part. The lower part is designed to allow a shield guide around the milling drum box. The upper part of the scraper guide protrudes vertically above the scraper blade and in particular leads the upper edge region of the scraper blade in a vertical movement. The upper part of the scraper guide also includes the counter bearing for the hydraulic cylinder that moves the scraper blade. The upper part of the Scraper guide usually forms at tail rotor milling the rear end of the ground milling machine in the direction of work and protrudes behind the control station on the floor of the control station and the seat of the driver's seat also on. It usually extends from the so-called zero side of the ground milling machine to over half of the transverse direction to the working longitudinal side of the scraper blade.

In order to provide the driver of the ground milling machine a better overview of the work area, also the driver's seat of the control station is usually offset in the direction of the zero side. This means that the driver's seat of the control station is not positioned centrally to both longitudinal sides of the ground milling machine, but offset to one of the long sides, usually the zero side. The driver's seat is adjustable between a transport position for the transport operation and a working position for the working operation of the ground milling machine. For example, it is in transport position when the ground milling machine is transported by itself, for example to or from a place of use or between two places of use. In the working position, however, the driver's seat is preferably when the floor milling machine is in working mode, ie degrades soil material with a rotating milling drum. The working position is offset in relation to the transport position in the direction of the zero side of the ground milling machine, wherein the transport position relative to the machine center may be offset in the direction of the zero side, but not as pronounced as in the working position. Due to the lateral offset, the driver can assume a seating position, in particular in working mode, in which he can look beyond the lateral outer edge of the ground milling machine to the ground area in order to check whether the milling work takes place along the desired track. For this purpose, the driver can also lean over the edge of the machine frame through the offset to the zero side arrangement of the driver's seat to improve his view even further. In order to be able to carry out the milling work in a particularly precise manner, it would be desirable to also view the resulting milling track or the milling bed behind the ground milling machine as close as possible to the ground milling machine.

The view of the areas in the working direction behind the milling drum is difficult in the ground milling machines of the prior art, however, since the upper part of the scraper guide forms the rear wall of the control station from the neutral side to the center of the scraper blade. This prevents the driver from seeing the area immediately behind the ground milling machine without protruding far beyond the machine frame of the ground milling machine.

The object of the invention is therefore to provide a ground milling machine, in particular a road cold milling machine, in which both a secure guidance of the scraper blade is ensured in its height adjustment between the working and the transport position, as well as an improved view of the driver compared to the prior art the ground milling machine on the lying in the direction behind the ground milling machine area, in particular on the milling track or the Fräsbett and the Fräskanten to allow.

The solution of the problem succeeds with a ground milling machine, in particular a road cold milling machine, according to the independent claim. Preferred developments are specified in the dependent claims.

The core idea of the invention resides in the fact that the upper part of the scraper guide is designed on the ground milling machine in such a way that there is a visual omission open transversely to the working direction from the null side to a side wall of the upper part of the scraper guide, through the driver's seat which can be seen in the working direction behind the ground milling machine and on the zero side milling edge. The side wall represents the outer boundary of the upper part of the scraper guide to the zero side. The upper part of the scraper guide comprises to this usually one of these opposite and to the zero side opposite side of the Bodenfräsmaschine facing second side wall. In essence, therefore, should be formed in the working direction behind the driver's seat, a clearance or a visual omission, which is open from the driver's seat down to the working direction behind the Bodenfräsmaschine and thus gives the driver the opportunity through this visual omission through the work area behind the Bodenfräsmaschine from the sitting position to be seen in the driver's seat. This area includes not only the milling track but also untreated or already worked areas, as well as the milling bed or the milling track with its edges. In particular, according to the invention, the milling track can be viewed more easily by the driver of the ground milling machine and, in particular, at a shorter distance from the ground milling machine, that is, closer to the rear of the ground milling machine than is possible with ground milling machines of the prior art. This improved visibility is made possible by the fact that the upper part of the scraper guide is spaced from the null side of the ground milling machine on the view omission. Overall, the upper scraper guide is thus formed spaced transversely to the working direction to the zero side, so that in this distance range a obstacle-free field of view for viewing the lying behind the ground milling machine work area is obtained by the driver.

The driver's seat of the ground milling machine according to the invention can be adjusted between a transport position and a working position. In order to ensure an objective description or definition of these two positions, according to the invention, the normatively defined seat index point of the driver's seat can be used. The seat index point is one in the Standard EN ISO 5353 defined standard. The standard EN ISO 5353 is hereby incorporated by reference. The seat index point is determined in the context of the present disclosure with the destination device described in this standard. Conveniently, the seat index point of the driver's seat is thus at an intersection of a theoretical axis of the upper body of a driver sitting in the driver's seat with the theoretical axis of the thigh on the vertical plane passing through the seat centerline. Further details on the seat index point can be found in the mentioned standard. In other words, the seat index point represents a standard point for detecting a person sitting in a seat. Important for the invention is that the driver's seat has a separate, defined seat index point in the transport position and in the working position. It is also important that the adjustability of the driver's seat is designed such that its seat index point in working position (as also the driver's seat itself) relative to the seat index point of the driver's seat in transport position in the direction of the zero side, may also be beyond the zero side addition. As a result, the driver sitting in working position befindlichem driver's seat sitting in working position relative to the transport position to the zero side offset relative position, which in particular his visibility to the zero side of the ground milling machine can be improved.

The vision improvement according to the invention succeeds particularly advantageously when the width of the visual omission is at least so great that the seat index point of the driver's seat in the working position and / or in the transport position in the working direction of the ground milling machine lies within the visual omission. The visual omission extends horizontally and transversely to the working direction, preferably thus far enough from the zero side of the ground milling machine to the machine center, that a horizontal parallel to the working direction, which runs through the seat index point, passes through the visual omission. In other words, the zero-sided sidewall of the upper part of the scraper guide is spaced from the neutral side of the ground milling machine at least to a plane perpendicular to the rotational axis of the milling drum and which intersects the seat index point of the driver's seat in the working position or even in the transport position.

The spacing of the side wall or the width of the visual omission should amount to at least 10%, preferably at least 25% and particularly preferably at least 40% of the milling box width of the milling drum box. The width of the visual omission extends transversely to the working direction or parallel to the axis of rotation of the milling drum in the horizontal direction from the null side to the zero-side guide wall of the upper part of the scraper guide. In general, it is advantageous to provide as wide a view as possible. The dimensions of the visual omission are limited only by the necessity of the upper part of the scraper guide and its functionality. The larger the visual omission, the better the driver can see from the driver's seat the areas behind the ground milling machine. The milling box width of the milling drum box is therefore a suitable reference because it remains constant, regardless of the milling drum used, which can have different dimensions.

Also along the Fräskastenbreite the upper part of the scraper guide is arranged. The narrower the area filled in by this, the greater the visual omission can be designed. In general, the upper part of the scraper guide must be made so wide that a secure height adjustment and support of the sometimes very heavy scraper blade and at the same time a secure guidance of the movement of the scraper blade is ensured. The height adjustment is done by a height adjustment device, such as a hydraulic cylinder. As long as the safe guidance and height adjustment of the wiper blade can be guaranteed, the smallest possible execution of the upper part of the wiper guide is advantageous. Accordingly, it is preferred if the width of the scraper guide is at most 50%, preferably at most 30% and particularly preferably at most 10% of the milling box width of the milling drum box. With respect to the entire machine width of the ground milling machine, it is advantageous if the width of the upper part of the scraper guide is at most 30%, preferably at most 20% and particularly preferably at most 10% of the machine width of the ground milling machine. Widths of the visual omission or of the upper part of the scraper guide, which orientate on these values, ensure a particularly advantageous view of the driver from the driver's seat on the areas in the working direction behind the ground milling machine.

In the horizontal direction transversely to the working direction, the visual omission is thus essentially limited only by the upper part of the scraper guide, in particular its zero-sided guide wall, while it is substantially open in the direction of the zero side and preferably extends to the zero side. In the vertical direction is the Visual omission ideally open to the top. The vertical lower limit of the visual omission is preferably at the level of or below the Fahrstandbodens of the control station. The operator's floor is the area of the control station that can be entered by persons and on which the driver's seat is located. If the visual omission extends in the vertical direction to below this Fahrstandboden, the driver can look particularly advantageous from the driver's seat on the rearward in the working direction edge of the control station or the driving floor on the areas that are substantially immediately or close behind the ground milling machine , In the field of visual omission, the machine frame of the ground milling machine thus falls behind the control station in the vertical direction in this embodiment. To further improve the visibility, the rear edge of the platform floor in the direction of work can also be bevelled sloping counter to the working direction or to the rear in order to ensure the widest possible field of vision.

For the driver's field of vision, the position of the driver's seat on the ground milling machine is of central importance. In principle, it is possible that the driver's seat over the working position and the transport position is arranged freely adjustable on the control station. It is particularly advantageous for practical use, however, if the driver's seat is adjustable only within an area, in particular between two fixed positions. These two always identical and precisely defined positions are the transport position and the working position. It is particularly advantageous if the driver's seat is adjustable within a pivoting range, the end stops of the transport position and the working position correspond. In the best case, the driver's seat can only be fixed to the respective end stops. This has the advantage that the driver can adjust the driver's seat safely and reliably between these two positions, which is advantageous, for example, in busy adjustment processes. The adjustability of the driver's seat can take place, for example, about a substantially vertical axis of rotation along a circle segment in a horizontal direction, preferably at an angle of 45 °, starting from the transport position of the driver's seat in the direction of the zero side. Ideally, the seat index point of the driver's seat is in both positions in the area of the visual omission and vertically above the machine frame. However, it is also conceivable to move the driver's seat and thus also the seat index point far enough beyond the edge of the machine frame that it no longer lies in the area of the visual omission or vertically above the machine frame, but projects laterally beyond the machine edge.

So that no person located in the control station of the ground milling machine falls down through the sight to the rear of the ground milling machine, especially if this extends to the bottom of the control station, a safety railing is preferably present, which extends at least along the width of the visual omission and in the working direction behind the Driver's seat is arranged. The securing railing extends substantially transversely to the working direction or parallel to the axis of rotation of the milling drum. In other words, this safety railing closes the gap between the zero side of the ground milling machine and the upper part of the scraper guide in the working direction behind the control station and in particular the driver's seat. This conclusion by a safety railing represents a purely safety measure for the driver of the ground milling machine, and does not limit the inventively improved view of the area lying in the working direction behind the ground milling machine at sufficient strength for security purposes. The safety railing is not designed to be flat, but as fine as possible.

Preferably, a safety hook is provided, on which the wiper blade can be secured in its maintenance position against unintentional driving down. This hook prevents the sometimes very heavy scraper blade moves during maintenance work inside the Fräswalzenkastens from its maintenance position, thus leading to a threat to the maintenance personnel. Preferably, the securing hook for the scraper blade is adjustably mounted on the outer wall of the side wall facing away from the neutral side of the upper part of the scraper guide. Due to the mounting of the safety hook outside the transversely to the working direction towering elongated upper part of the scraper guide an optimal arrangement of the safety hook is possible without hindering the field of view within the visual omission.

So that the driver of the ground milling machine is informed at any time of the working operation in which height position the scraper blade is currently located, it is advantageous if an adjustment indicator is present, whose components ideally on the zero side facing outer wall of the upper part of the scraper guide and the scraper blade are arranged and indicating the height of the Abstreiferschildes. During the height adjustment of the scraper blade, the scraper blade itself and the scraper guide are two relatively moving parts. It is therefore advantageous to arrange, for example, a pointer on one of the two parts and, for example, a measuring strip on the other of the two parts. Due to the relative movement of the Scraper blade for Abstreiferführung is also a relative movement of the measuring bar to the pointer or vice versa. By applying a corresponding scale of values on the measuring strip, the driver can read from the driver's seat at any time the corresponding value for the current height adjustment of the wiper blade on the adjustment display.

The invention will be explained in more detail with reference to the embodiment shown in the figures. They show schematically:

1 a side view of a generic ground milling machine;

2 a view from above of a generic ground milling machine;

3 a view according to 2 with swung-in rear cruise ship;

4 a view of the rear of a ground milling machine from a slightly elevated position laterally behind the machine;

5 a view of the rear of a ground milling machine in the working direction; and

6 a view from above of the control station of a ground milling machine in the driver's seat area.

Identical and at least functionally identical components are indicated in the figures with the same reference numerals, wherein in the figures repetitive components are not always designated separately in each figure.

1 shows a generic Bodenfräsmaschine 1 , in particular a road tiller of the type tail rotor tiller. This includes a machine frame 3 , a drive motor 4 which is usually an internal combustion engine, such as a diesel engine, and cruise ships 6 which can include both wheels and track drives. Furthermore, the ground milling machine includes 1 a milling drum box 9 in which a milling drum 7 around a rotation axis 8th rotatably mounted. The milling drum 7 is at the rear of the machine frame at the rear of the machine 13 stored. In working mode of the ground milling machine 1 is about the rotational movement of the milling drum 7 Flooring 10 in working direction a of the ground milling machine 1 milled and optionally via a discharge belt 5 overloaded on an unillustrated transport vehicle. The back in the working direction a wall of the Fräswalzenkastens 9 is essentially a scraper blade 11 educated. Above and in vertical direction above the milling drum 7 or the milling drum box 9 there is a control station 36 with a driver's seat 2 , In working direction a behind the driver's seat 2 is the upper part 12a a scraper guide 12 , which will be discussed in more detail below.

The 2 and 3 show the ground milling machine 1 from a perspective from above and illustrate the location of the control station 36 above the milling drum 7 or the milling drum box 9 , Furthermore, the staggered positioning of the milling drum 7 offset from the machine center in the direction of the so-called zero side B shown. The cruise ship 6 in the direction of work a at the right rear of the ground milling machine 1 is in 2 shown in the swung-out position that it is in normal working operation of the ground milling machine 1 holds. In milling, where the milling edge is to be particularly close to a wall, edge or other obstacle, the cruise ship 6 in the direction of work a at the right rear of the ground milling machine 1 , as in 3 shown, are brought into a pivoted position. In this position, it does not protrude beyond the zero-sided outer edge of the ground milling machine 1 to the side. This makes it possible, almost flush to the edge of the machine frame 3 to mow on an obstacle on the zero side B of the ground milling machine 1 lies. On the opposite side A of the ground milling machine 1 this is not possible. The zero side B of the ground milling machine 1 So, in general, that side is closer to the edge of the machine frame 3 or can be milled to an obstacle, which by a laterally offset, eccentric mounting of the milling drum 7 is possible. Ideally, it is accordingly, as indicated in the figures, to arrange the milling drum so offset to the machine center, that one end of the milling drum is substantially flush with the side wall of the machine frame on the zero side. In addition, in the 2 and 3 also stated that the driver's seat 2 relative to the machine center M is offset horizontally and transversely to the working direction in its position to the neutral side B. The driver's seat 2 is thus closer to the null side B than on the opposite side A of the ground milling machine 1 , The machine center M is in the 2 and 3 indicated as dashed running in the direction of the center line.

The structure of the scraper blade 11 and the scraper guide 12 with the upper scraper guide 12a and the lower scraper guide 12b is in the 4 and 5 clarified. 4 is a perspective view of the machine rear 13 from a slightly offset to zero side B and elevated position. 5 is a rear view on the rear of the machine 13 the ground milling machine 1 in working direction a. The scraper shield 11 closes the milling drum box 9 in the working direction a behind the milling drum 7 and runs essentially over the entire width 35 of the milling drum box 9 , the between the two end faces 33 . 33 ' of the milling drum box 9 lies. The task of the scraper blade 11 is to either ensure that no milled material in the milling bed 31 remains or a desired amount of milled material in the milling bed 31 to leave. If no milled material is to be left behind, the scraper blade becomes 11 so deep into the milling bed 31 adjusted one on the scraper blade 11 arranged abrasion strip 16 over the surface of the milling bed 31 is performed scratching. Should a certain amount of milled material in the milling bed 31 remain, so the scraper blade 11 along with the scraper bar 16 at a suitable distance from the surface of the milling bed 31 brought.

To this and other height adjustments of the scraper blade 11 To realize is a height adjustment device 20 present, which may be, for example, a hydraulic cylinder, and with the help of the scraper blade 11 both during operation for adjusting the amount of material to be stored in the milling bed 31 , as well as in the substantially maximally vertically offset maintenance position höhenverstellt and in particular can be moved vertically. In the 4 and 5 is the wiper blade 11 each in the lowered working position.

The hydraulic cylinder 20 is at the upper part of the scraper guide 12a stored with its cylinder side and with its lower end on the piston side scraper blade 11 in relation to the width of the wiper blade 11 hinged substantially centrally in the direction of the axis of rotation. The scraper shield 11 is in its height adjustment of both the upper part of the scraper guide 12a and the lower part of the scraper guide 12b guided. The lower part of the scraper guide 12b is at both, transverse to the direction a sides of the scraper blade 11 arranged and is substantially formed as a lateral Führungsumgriff, along which the scraper blade 11 slides in the vertical direction during its height adjustment. The upper part of the scraper guide 12a on the other hand is considerably narrower and has a width 34 on, which is smaller than the machine width 49 the ground milling machine 1 and which is also smaller than the width 35 of the milling drum box 9 , The upper part 12a the scraper guide 12 also protrudes vertically upward from the machine frame. The upper part of the scraper guide 12a essentially comprises a frame 19 that extends over its entire width 34 extends and towards the machine sides A, B through the side walls 38 ' and 38 is limited. Vertically upwards is the upper part of the scraper guide 12a through the cover 29 limited and stands over the ground 40 . 40 ' the control station 36 and also over the seat 37 of the driver's seat 2 out.

The guide of the scraper blade 11 at the upper part of the scraper guide 12a is about a guide element 32 realized that via a leadership advantage 17 on the scraper blade 11 is arranged and engaged with a slot 18 in the management framework 19 the upper part of the scraper guide 12a stands. The guide element 32 is at a height adjustment of the scraper blade 11 so in the slot 18 guided that the scraper blade 11 only a rectilinear and substantially vertical upward or downward movement along the upper part of the scraper guide 12a can perform. The direction of movement of the scraper blade 11 follows the vertical extension of the upper part of the scraper guide 12a ,

Furthermore, there is a safety hook 39 at the upper part of the scraper guide 12a that with an eyelet 41 on the scraper blade 11 can be engaged when the wiper blade 11 is in maintenance position and thus substantially vertically adjusted in height. The safety hook 39 is not within the width 34 the upper part of the scraper guide 12a arranged, but on the opposite side of the zero side of the side wall 19 , In particular for this purpose is the safety hook 39 in the vertically upper third of the upper part of the scraper guide 12a stored.

On the side of the upper part of the scraper guide which is directed to the neutral side B 12a there is an adjustment display 42 holding a measuring bar 44 and a pointer 45 includes. In the example shown is the measuring bar 44 on the scraper blade 11 and the pointer 45 at the upper part of the scraper guide 12a , specifically at the guide wall 38 arranged. With a height adjustment of the wiper blade 11 there is a relative movement of the measuring strip 44 opposite the pointer 45 , causing the driver of the ground milling machine 1 from the driver's seat 2 from a corresponding value of the height adjustment on a scaling of the measuring bar 44 can read off. Of course it is also possible to use the pointer 45 on the scraper blade 11 and the measuring bar 44 at the upper part of the scraper guide 12a to arrange.

The helmstand 36 who in 6 in a perspective view from above, comprises a driver-accessible, higher-level control room floor 40 and a lower in the vertical direction Fahrstandboden 40 ' , The two driving floors 40 . 40 ' are connected by a step. On the ascent to the ground milling machine 1 the driver first reaches the driver's floor 40 ' and then climbs over the step to the second driving floor 40 up, on which is the driver's seat 2 located. The driver's seat 2 includes an armrest 25 with an elbow support 24 and often a control lever / joystick used to control the floor milling machine 1 is used. Also from the driver's seat 2 out of reach is a control panel 14 , from which the further control of the ground milling machine 1 he follows. The driver's floor 40 falls on the working direction a rear side of the control station 36 vertically downwards towards the (earth or road) floor 50 off and gets off a sheet 46 dressed. This sheet 46 that is not above the driver's floor at the top 40 stands out together with the driver's floor 40 in the working direction a rear edge of the control station 36 , The helmstand 36 is essentially above the Fräswalzenkastens 9 arranged.

In the 4 . 5 and 6 is the visual omission according to the invention 30 shown dotted. The visual omission 30 lies on the side of the upper part of the scraper guide which is directed to the neutral side B 12a and extends horizontally and transversely to the working direction of the side wall 38 the upper part of the scraper guide 12a to the zero side B of the ground milling machine 1 , wherein it is designed to be open on the null side B and is formed free of limitations. In the vertical direction, the visual omission extends from below the floor of the control station up to the upper end of the upper scraper guide. In the horizontal direction transverse to the working direction a or parallel to the axis of rotation 8th the milling drum 7 is the visual omission 30 essentially through the upper part of the scraper guide 12a , specifically the guide wall 38 , bounded to the Z side B from the upper part of the scraper guide 12a seen from no limitation or is open. In the vertical direction has the visual omission 30 No limitation at the top or open at the top. In the vertical direction downwards, the visual omission extends 30 both up to below the higher-level driver's floor 40 , as well as under the lower-lying Fahrstandboden 40 , In essence, the visual omission 30 in the vertical direction down so only through the Fräswalzenkasten 9 limited. This limitation of visual omission 30 is approximately in the area of the edge of the scraper blade 11 in working position, furthest from the ground 50 is removed and essentially the vertically upward end of the scraper blade 11 represents. The length of the visual omission 30 in working direction a substantially corresponds to the length of the upper part of the scraper guide 12a in working direction a and the distance between the sheet 46 and the scraper blade 11 in maintenance position and in working direction a. The width 15 the visual omission 30 transverse to the working direction a or parallel to the axis of rotation 8th the milling drum 7 is smaller than the milling box width 35 of the milling drum box 9 , The visual omission 30 So creates a free area in the vertical direction upwards and in the horizontal direction transverse to the direction of a to Zero side B of the ground milling machine 1 is designed open and down through the upper end of the Fräswalzenkastens 9 as well as to side A of the ground milling machine 1 through the upper part of the scraper guide 12a is limited.

In working direction a before the visual omission 30 on the helmstand 36 is the driver's seat 2 , This is between a working position (shown in the 4 and 5 ) and a transport position (shown in FIG 6 ) adjustable. Specifically, the driver's seat 2 for example, by a circle segment at an angle of 45 ° in the horizontal direction to the null side B out swiveled. In transport position is the driver's seat 2 aligned substantially parallel to the working direction a. The driver of the ground milling machine 1 thus has a particularly good overview of the working direction a in front of the ground milling machine 1 lying areas, and can the ground milling machine 1 bring them safely and quickly to their place of work. By contrast, the working position is pivoted in the direction of the neutral side B and at an angle of 45 ° to the machine center with respect to the transport position. In the working position, the driver of the ground milling machine 1 during working operation not only the area in working direction a in front of the ground milling machine 1 see, but also with relatively little effort by a rotation of his upper body and head against the working direction a in the working direction a behind the Bodenfräsmaschine 1 See lying areas. The working position or the transport position of the driver's seat 2 each represent an end stop of the adjustment range. The driver's seat 2 each has a seat index point in both positions 21 . 21 ' on. The seat index point 21 . 21 ' is located approximately on the median longitudinal plane of the driver's seat 2 just above the seat 37 ,

In working direction a directly behind the driver's seat 2 joins the end of the platform floor 40 the visual omission 30 at. As in 5 recognizable, lies parallel to the direction of a running vertical plane 22 ' that the seat index point 21 ' of the driver's seat 2 in working position, partly within the visual omission 30 , Likewise, the vertical plane lies 22 , which also runs parallel to working direction a and the seat index point 21 of the driver's seat 2 in transport position partially cuts within the visual omission 30 , By such an arrangement of the driver's seat 2 becomes the driver of the ground milling machine 1 particularly easy, only by turning his upper body or head, a view through the visual omission 30 on the areas in working direction a behind the ground milling machine 1 allows. So the driver of the ground milling machine 1 not in danger, in working direction a to the rear of the control station 36 the ground milling machine 1 through the visual omission 30 Falling down is essentially across the entire width 15 the visual omission 30 on the tin 46 a security railing 23 arranged. The security railing 23 rises vertically above the driver's floor 40 and thus secures the control station 36 the ground milling machine 1 from. At the same time, the security railing 23 created so that it is the view of the driver of the ground milling machine 1 through the visual omission 30 through the areas in the working direction a behind the Bodenfräsmaschine 1 not disabled.

This with the inventive design of the upper scraper guide 12a obtained optimized viewing areas are particularly in 6 shown. The viewing areas and viewing limits referred to below all relate to the driver's view of the ground milling machine 1 from the driver's seat 2 off, which is in working position. In other words, the terms all refer to visual ranges and visual limits of a seating position of the driver having the seat index point at the 21 ' designated place. From this position, the driver can by simple rotation of his upper body or head the area 26 good, so essentially obstacle-free, see. In this area 26 are parts of the unprocessed soil 50 , but also for the course of the work operation and in particular the control of the ground milling machine 1 relevant areas, such as the milling track or the milling bed 31 located on the neutral side B of the ground milling machine 1 lying milling edge 43 and the opposite of this milling edge 43 ' , Especially the milling edge on the zero side B 43 is from the driver's seat 2 out through the visual omission 30 particularly advantageous in almost immediate proximity to the rear of the machine 13 the ground milling machine 1 visible, noticeable. This allows the driver of the ground milling machine 1 judge particularly well whether the milling work runs along a desired line or whether it is the course of the ground milling machine 1 must correct. By a slight rejection of the driver from the driver's seat 2 in the direction of the zero side B of the ground milling machine 1 is it also possible for him as 27 designated area, which is therefore considered to be restricted. The area 28 However, even when the driver is leaning out, it remains poorly or not at all visible. Should the driver of the ground milling machine 1 nevertheless insight into the area 28 wish, so he can in the direction of the machine side A from the driver's seat 2 lean out and in this direction at the top of the scraper guide 12a past the area 28 look. This is made possible in particular by the fact that the safety hook 39 outside the upper part of the scraper guide 12a in the vertically upper third of the upper part of the scraper guide 12a on the guide wall 38 ' is stored and thus does not obstruct the view.

For comparison are in 6 also indicated by dashed lines the visual limits in ground milling machines from the prior art. Due to the lack of visibility in the prior art, the driver from the driver's seat, which is in working position, only an area up to the line of sight 47 good and to the limit of vision 48 restricted view. The entire remaining area is not visible in a ground milling machine according to the prior art.

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 202011105309 U1 [0002]
• DE 102012012607 [0002]
• DE 102012018918 [0002]

Cited non-patent literature

• Standard EN ISO 5353 [0011]

Claims (11)

Ground milling machine ( 1 ), in particular road cold milling machine, for milling ground material ( 10 ) with - a machine frame ( 3 ), - a zero side (B), - one at the rear of the machine ( 13 ) arranged control station ( 36 ) with a driver's seat offset from the machine center in the direction of the neutral side (B) ( 2 ), whereby the driver's seat ( 2 ) between a transport position for the transport operation and a working position for the working operation of the ground milling machine ( 1 ) is adjustable, - one at the rear of the machine ( 13 ) arranged milling drum ( 7 ), and - a milling drum box ( 9 ), in which the milling drum ( 7 ) about a rotation axis ( 8th ) is rotatably mounted, with a height-adjustable scraper blade ( 11 ) caused by a scraper guide ( 12a . 12b ) is guided between a high maintenance position and a lowered working position, wherein the upper part of the scraper guide ( 12a ) in the working direction (a) behind the driver's seat ( 2 ) on the machine frame ( 3 ) and vertically upstands, characterized in that the upper part of the scraper guide ( 12a ) on the ground milling machine ( 1 ) is formed such that a transversely to the working direction (a) from the null side (B) to a guide wall ( 38 ) of the upper part of the scraper guide ( 12a ) openly formed visual omission ( 30 ) by which the driver's seat ( 2 ) in the working direction (a) behind the ground milling machine ( 1 ) and on the null side (B) lying Fräskante ( 43 ) is visible. Ground milling machine ( 1 ) according to claim 1, characterized in that the width ( 15 ) the visual omission ( 30 ) is at least so large that a seat index point ( 21 ' ) of the driver's seat ( 2 ) in the working position in the working direction (a) of the ground milling machine ( 1 ) within the visual omission ( 30 ) lies. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that the width ( 15 ) the visual omission ( 30 ) is at least so large that a seat index point ( 21 ) of the driver's seat ( 2 ) in transport position in the working direction (a) of the ground milling machine ( 1 ) within the visual omission ( 30 ) lies. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that the width ( 15 ) the visual omission ( 30 ) at least 10%, preferably at least 25% and particularly preferably at least 40% of the milling box width ( 35 ) of the milling drum box ( 9 ) is. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that the vertically lower boundary of the visual omission ( 30 ) at or above the ground ( 40 ) of the control station ( 36 ) lies. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that the width ( 34 ) of the upper part of the scraper guide ( 12a ) at most 50%, preferably at most 30% and particularly preferably at most 10% of the milling box width ( 35 ) of the milling drum box ( 9 ) is. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that the width ( 34 ) of the upper part of the scraper guide ( 12a ) at most 30%, preferably at most 20% and more preferably at most 10% of the machine width ( 49 ) of the ground milling machine ( 1 ) is. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that the driver's seat ( 2 ) is adjustable within a pivoting range, the end stops of the transport position and the working position correspond. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that a safety railing ( 23 ), which is along the width ( 15 ) the visual omission ( 30 ) in the working direction (a) behind the driver's seat ( 2 ) is arranged. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that a safety hook ( 39 ) for the scraper blade ( 11 ) is present, which on the outer wall of the zero side (B) facing away from the guide wall ( 38 ' ) of the upper part of the scraper guide ( 12a ) is adjustably mounted. Ground milling machine ( 1 ) according to one of the preceding claims, characterized in that an adjustment indicator ( 42 ) is present whose components on the zero side (B) facing outer wall of the upper part of the Abstreiferführung ( 12a ) and the scraper blade ( 11 ) are arranged and the the adjustment height of the wiper blade ( 11 ).

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