AGRICULTURAL WORK MACHINE

Description

[0001] The invention relates to an agricultural work machine comprising a driver's cab in which a driver's station for a machine operator of the work machine is provided, wherein the driver's cab comprises a plurality of upright oriented posts, a roof supported on the posts and at least one upright oriented window.

[0002] Such a work machine is known from EP 1 190 939. The posts here are two continuous curved hollow profiles. Increasingly larger operator cabs of such work machines place high demands on rollover protection.

[0003] The invention is based on EP 2 174 808, which states that it is known to draw in fresh air for an air conditioning system in the driver's cab through hollow profiles.

[0004] Document WO 2012 / 087502 A2 discloses the preamble of claim 1.

[0005] The invention is based on the objective of improving rollover protection and improving the intake of fresh air.

[0006] Based on the known machine, the invention proposes providing at least one continuous, U-shaped frame comprising two end legs and a crossbar connecting the legs, with each leg of the frame forming one of the posts. The connection of the posts by the crossbar improves the stability of the driver's cab and thus the rollover protection.

[0007] In a machine according to the invention, the frame is formed in one piece. The frame can then be manufactured particularly easily, especially without fasteners. According to the invention, the frame is free of joints, especially welds. The frame thus avoids weak points.

[0008] Preferably, in a machine according to the invention, the bolt is designed in an arc shape. The shape of the bolt is then approximately the most technically stable shape of a circle.

[0009] Preferably, in such a work machine, the beam is curved towards the roof. In the event of a rollover, the work machine then rests on the beam. Alternatively, the beam can also be curved in the direction away from the roof.

[0010] According to the invention, in such a work machine, the legs each form a B-pillar of the driver's cab, with the frame's crossbar extending at least substantially in a transverse direction of the work machine. The B-pillars are a particularly vulnerable substructure of the driver's cab in the event of a rollover.

[0011] Preferably, in a machine according to the invention, the frame has a hollow profile over at least a portion of its length. The frame is then particularly torsionally rigid over this portion, and can also accommodate supply lines for the machine there. Particularly preferably, the frame has the hollow profile over its entire length. The frame is then particularly torsionally rigid over its entire length.

[0012] According to the invention, such a machine has an air conditioning system with a suction fan for drawing in a supply air stream through an interior space of the frame into the air conditioning system. The frame then simultaneously assumes the function of a ventilation duct.

[0013] Preferably, in such a machine, the supply air stream enters the frame at an air inlet and exits the frame at an air outlet below the air inlet. During operation, the air inlet is then located outside the near-ground air layers, which are particularly burdened with suspended particles.

[0014] Preferably, in such a machine, the supply airflow is deflected at an obtuse angle when entering the frame, within the frame, and / or when exiting the frame. This results in particularly low noise levels during operation of the machine.

[0015] Preferably, in a machine according to the invention, the frame accommodates one of the windows. The window can, in particular, completely fill the frame.

[0016] Preferably, such a machine has a vibration-reducing seal between the frame and the window. This reduces the noise level in the driver's cab.

[0017] The roof can be supported directly or indirectly on the posts.

[0018] The invention is explained in more detail below with reference to an exemplary embodiment. The figures show in Fig. 1: a working machine according to the invention, Fig. 2: the driver's cab of the working machine, Fig. 3: a force line in a cab housing of the driver's cab in the event of a rollover, Fig. 4: air supply flows in the cab housing, Fig. 5: a frame of the cab housing and Fig. 6: a section through the frame.

[0019] The in Figure 1 The depicted working machine 1 has a Figure 2 The driver's cab 2 is shown in detail, with a driver's platform 3 for a machine operator 4. The driver's cab 2 has a cab housing 5 and windows 6, a door 7, and a roof 8 attached to the cab housing 5.

[0020] The cabin housing 5 has a continuous, U-shaped frame 9 with two end legs 10 and a crossbar 11 connecting the legs 10. Each leg 10 forms one of four upright posts 12 of the cabin housing 5, on which the roof 8 is supported. The crossbar 11 extends in an arc in a transverse direction 13 of the machine 1 and is curved in the direction away from the roof 8.

[0021] In the event of a rollover - especially if the work machine 1 is lying upside down on the roof 8 - the posts 12 bear the load of the work machine 1. Figure 3 Figure 14 shows an example of a force line 14, in this case through one of the posts 12. Due to the mounting of the frame 9 on the driver's cab 2, the lever arm 15 of the load acting on the post 12 is only small.

[0022] The frame 9 has a hollow profile 16 along its entire length and accommodates the rear window 6 of the driver's cab 2 in a circumferential vibration-reducing seal 17. Air inlets 21 for supply air to an air conditioning system (not shown) of the driver's cab 2 are arranged at the outermost ends 18 of the legs 10.

[0023] The supply air is drawn into the air conditioning system by means of a suction fan through the air inlets 21, an interior space 20 of the frame 9, and air outlets 21 located centrally on the bar 11. The supply air streams 22 are always deflected at obtuse angles as they enter, move within, and exit the frame 9, in order to avoid turbulence and the resulting air noise. Reference symbol list

[0024] 1. Working machine 2. Driver's cab 3. Operator's platform 4. Machine operator 5. Cab housing 6. Window 7. Door 8. Roof 9. Frame 10. Leg 11. Rail 12. Post 13. Transverse direction 14. Force line 15. Lever arm 16. Hollow profile 17. Seal 18. End 19. Air inlet 20. Interior 21. Air outlet 22. Supply air flow

Claims

1. An agricultural working machine (1), comprising a driver's cabin (2), in which a driver's station (3) for a machine driver (4) of the working machine (1) is fitted, wherein the driver's cabin (2) comprises a plurality of posts (12) which are upright in orientation, a roof (8) mounted on the posts (12) as well as at least one window (6) which is upright in orientation, having at least one continuous, U-shaped frame (9) which has two end legs (10) as well as a bar (11) connecting the legs (10), wherein the legs (10) of the frame (9) respectively form one of the posts (12), wherein the frame (9) is formed in one piece, wherein the frame (9) is free from joints, in particular weld seams, wherein the legs (10) respectively form a B-pillar of the driver's cabin (2), characterized in that the bar (11) of the frame (9) extends at least substantially in a transverse direction (13) of the working machine (1), and characterized by an air conditioning system with a suction fan for drawing in a supply air flow (22) through an interior space (20) of the frame (9) into the air conditioning system.

2. The working machine (1) according to the preceding claim, characterized in that the bar (11) is arc-shaped in construction.

3. The working machine according to the preceding claim, characterized in that the bar is curved in the direction of the roof.

4. The working machine (1) according to one of the preceding claims, characterized in that the frame (9) has a hollow profile (16) over at least part of its length, preferably over its entire length.

5. The working machine (1) according to one of the preceding claims, characterized in that the supply air flow (22) enters the frame (9) at an air inlet and exits the frame (9) at an air outlet which is below the air inlet.

6. The working machine (1) according to one of the preceding claims, characterized in that the supply air flow (22) is deflected at an obtuse angle when entering the frame (9), within the frame (9) and / or when exiting the frame (9).

7. The working machine (1) according to one of the preceding claims, characterized in that the frame (9) accommodates one of the windows (6).

8. The working machine (1) according to the preceding claim, characterized by a vibration-reducing seal (17) between the frame (9) and the window (6).