Vehicle crane cabin with swing door

Abstract

We provide work machinery, particularly vehicle crane cabins, equipped with optimized swing doors. [Solution] The upper door mechanism (13) has a single upper guide lever (13c) fastened to the swing door (9) via a first upper guide joint (13a) and to the cabin (8) via a second upper guide joint (13b). To provide a working machine with an optimized swing door, in particular a cabin for a vehicle crane, it is proposed that the second upper guide joint (13b) is positioned on the roof (8f) of the cabin (8) in such a manner that it is offset inward and rearward relative to the first upper guide joint (13a) when the sliding door (8) is in the closed position, and is positioned in the rear third of the length of the roof (8f), relative to the length of the roof (8f).

Description

Technical Field

[0001] The present invention relates to a cabin for a vehicle crane that includes a swing door fastened to the cabin via a lower door mechanism and an upper door mechanism, the swing door being movable between a closed position and an open position.

Background Art

[0002] German Laid-Open Patent Publication No. 103 61 831 A1 already discloses a cabin with a single-leaf swing door for use in cranes or excavators. This swing door can be used to close and open a door opening arranged on the side surface of the cabin. For this purpose, the swing door is suspended at the inside of its upper end via a support joint having a vertical pivot axis in the region above the door opening. This support joint is intended to support the weight of the swing door, and the opposite end thereof is fixed to a bent support arm that terminates in a vertical rotating rod. The rotating rod is mounted so as to be rotatable above and below the inside of the cabin adjacent to the longitudinal side surface of the door opening. To open and close the swing door, the rotating rod is driven about its longitudinal axis in the rotational direction. Furthermore, the swing door is connected to the cabin via a further guide lever at the upper part and via two additional guide levers at the lower part. Via a total of three guide levers and the support arm, the swing door can move in and out of the door opening in a stable manner over a defined movement path. The swing door moves as a whole in a parallelogram manner via the guide levers and the support arm. In this case, the section of the movement path during the direct closing and opening of the door opening by the swing door is substantially linear, whereby the rubber seals provided on the swing door and the door opening are only stressed in the sealing direction and will not be deformed by lateral forces.

[0003] Furthermore, European Patent Specification No. 1085 154 B1 already discloses a sliding door for the cabin of a working machine, in particular a hydraulic excavator or a vehicle crane. The sliding door is guided vertically via rollers in guide rails on the cabin. To open and close the sliding door or the door opening of the cabin, the guide rails are each formed in an arc shape at one end.

[0004] German Published Patent No. 10 2023 131 660 A1 also discloses a further door system for a crane cabin. This door system comprises a door pivotably fixed to the crane cabin via a first lower rocker arm and a second upper rocker arm for closing and opening an access opening. Viewed from the access direction of the access opening, the upper and lower rocker arms are attached to the crane cabin in the area adjacent to the access opening, and the first and second rocker arms are guided to pass through the access opening in both the open and closed positions of the door.

[0005] Furthermore, German Utility Model Specification No. 20 2009 005 446 U1 discloses a vehicle crane having a crane cabin positioned in the superstructure of the vehicle crane in a manner that allows it to tilt around a horizontal axis. [Overview of the Initiative]

[0006] The object of the present invention is to provide a work machine, particularly a vehicle crane cabin, equipped with an optimized swing door.

[0007] This objective is achieved by a swing door having the features of claim 1. Advantageous embodiments of the present invention are described in dependent claims 2 to 14.

[0008] According to the present invention, in a vehicle crane cabin equipped with a swing door fastened to the cabin via a lower door mechanism and an upper door mechanism and movable between a closed position and an open position, the upper door mechanism has a single upper guide lever fastened to the swing door via a first upper guide joint and fastened to the cabin via a second upper guide joint, and the optimization of the swing door is achieved by the fact that the second upper guide joint is positioned in an offset manner, rearward and particularly inward, when viewed in the longitudinal direction of the cabin, with respect to the swing door in the closed position or the door opening for the swing door inside the cabin. This means that the upper door mechanism can be configured to make the cabin roof as transparent as possible without obstructing the view of the crane operator through the cabin roof. The cabin according to the present invention is characterized by a high level of ease of operation when opening and closing and by robustness. The swing door itself is ideal for access to and entry into the cabin.

[0009] In a structurally advantageous embodiment, the second upper guide joint is positioned in relation to the length of the roof, which is in the range of 20-40%, preferably 25-35%, of the length of the roof, and in relation to the width of the roof, which is in the range of 40-60%, preferably 45-55%, of the width of the roof.

[0010] It is particularly advantageous that the roof is designed in the manner of a window and has a window panel that is at least partially transparent. In this case, at least the area of ​​the roof adjacent to the door opening is transparent.

[0011] In a structurally advantageous configuration, the provision is made that the second upper guide joint is located on the roof of the cabin.

[0012] It is particularly advantageous that, at least when the swing door is in the open position, and in all intermediate positions including the closed position depending on the design, the upper guide lever extends inward through the longitudinal gap 10a below the longitudinal profile on the left side of the cabin, rather than extending through the door opening. This allows for an offset position behind the second upper guide joint.

[0013] In known advantageous embodiments, the lower door mechanism is designed in the form of a parallelogram.

[0014] In a structurally advantageous embodiment, the lower door mechanism has a first support lever and a second support lever, the first support lever being fastened to the swing door via a first lower support joint and to the cabin via a third lower support joint, and the second support lever being fastened to the swing door via a second lower support joint and to the cabin via a fourth lower support joint. The lower door mechanism is designed to be stable and support most of the weight of the swing door, so the upper door mechanism can consist of a single upper guide lever. Overall, the swing door is suspended at only three points. This suspension system is inherently rigid. Furthermore, this suspension system does not require the arrangement of guide rails to the cabin, which is structurally simple.

[0015] The movement speed of the swing door is limited by the fact that a gas spring is assigned to the lower door mechanism. The gas spring facilitates the opening of the swing door up to its dead center and ensures that the swing door opens further to the end stopper in the open position. To close the door from the end stopper in the open position to the dead center of the gas spring, the gas spring again provides assistance and ensures that the swing door closes easily after the dead center of the gas spring.

[0016] In a structurally advantageous embodiment, the gas spring is specified to be articulated between the first or second support lever and the cabin floor. In an alternative embodiment, two gas springs may be specified to be attached to both support levers.

[0017] In a particularly advantageous embodiment, the support pipe is positioned between the first lower support joint and the first upper support joint. In this case, since the support pipe is advantageously assigned to the swing door, it moves outward with the swing door and does not reduce the interior space of the cabin and / or the size of the door opening.

[0018] The operation of the swing door is optimized by the fact that a damper is assigned to the lower door mechanism, which dampens the movement of the swing door in the open position range. This damper also acts as an end stopper, preventing the swing door from colliding with the side of the cabin.

[0019] The fact that the movement of the swing door between the closed and open positions can be locked by a locking brake allows the crane operator to set the swing door to any open position for the purpose of ventilating the cabin and communicating with the outside. Even if the cabin is tilted to an inclined working position, the locking brake prevents the swing door from opening unintentionally due to the cabin's tilt.

[0020] In certain embodiments, it is specified that the locking brake operates electrically and / or continuously.

[0021] It is structurally particularly advantageous that the swing door can be moved between the closed and open positions manually by a crane operator, rather than being driven by a motor.

[0022] The fact that the cabin can be tilted upward and downward relative to the work machine about a horizontal pivot axis allows the crane operator to adapt his working field of view regarding the horizontal orientation to suit the situation.

[0023] In the context of the present invention, the term "vehicle crane" is understood to mean either a mobile crane or a telescopic crane having a lower carrier with rubber tires and capable of traveling on public roads, or a crawler crane having a lattice mast jib. Due to its robust design and optimized movement path during opening and closing, the swing door according to the present invention described above is particularly suitable for cabins with variable tilt angles. Brief Description of the Drawings

[0024] Hereinafter, the present invention will be described in more detail with reference to the exemplary embodiments shown in the drawings. [Figure 1] Figure 1 shows a schematic view of a vehicle crane equipped with a telescopic jib. [Figure 2] Figure 2 shows a perspective view of a cabin with a closed swing door. [Figure 3] Figure 3 shows a side view of the cabin tilted upward. [Figure 4] Figure 4 shows a further perspective view of the cabin with the closed swing door and the associated door mechanism. [Figure 5] Figure 5 shows a plan view of the floor of the cabin with the lower door mechanism. [Figure 6] Figure 6 shows a perspective view of the upper door mechanism. [Figure 7] Figure 7 shows a perspective view of the lower region of the swing door.

[0025] Figure 1 shows a schematic side view of a vehicle crane 1, specifically a mobile crane, parked on a level ground U. The road-travelable vehicle crane 1 comprises a multi-axle lower carrier 2 with wheels 3 fitted with pneumatic tires. A superstructure 4 is mounted on the lower carrier 2, pivotable around a vertical axis relative to the lower carrier 2. A telescopic jib 5 is mounted on the superstructure 4 in a manner that allows it to be raised and lowered around a horizontal axis, with counterweights 4a attached to its ends. The telescopic jib 5 typically consists of a number of jib components 6, particularly an external base box 6a that houses multiple internal boxes 6b of the telescopic jib 5, which can be extended and retracted telescopically. In the retracted state, the internal boxes 6b are almost completely contained within the base box 6a. The base box 6a is articulated onto the superstructure 4 to allow the telescopic jib 5 to be raised and lowered. A hoist cable 7 extends over the free end of the telescopic jib 5, particularly over its innermost internal box 6b, from which a load lifting means (e.g., a load hook and a lower block through which the cable passes, along with the load hook) is suspended. The lower carrier 2 is shown to have a driver's cab 2a at its front end, particularly for when the vehicle crane 1 is traveling on roads or outdoors.

[0026] Furthermore, Figure 1 shows that an additional cabin 8 for the crane operator is located at the front end of the superstructure 4. This cabin 8 is fastened to the superstructure 4 in a tiltable manner via a pivot axis S. In this case, the pivot axis S is oriented horizontally and laterally with respect to the superstructure 4 and extends parallel to the luffing axis W to which the telescopic jib 5 is attached to the superstructure 4. Furthermore, viewed vertically, the pivot axis S is located approximately in the center and rear of the cabin 8. The fact that the cabin 8 can be tilted up and down makes it easier for the crane operator to observe the telescopic jib 5 and any loads suspended from the telescopic jib 5 during operation of the vehicle crane 1, particularly from an ergonomic standpoint. This allows the crane operator to adapt their working field of view to the situation.

[0027] Figure 2 shows a perspective view of the cabin 8 with a swing door 9 that closes the door opening 10 of the cabin 8 in the illustrated closed position. For clarity, the cabin 8 is shown without the superstructure 4 or any installation elements such as a seat with operating elements. Naturally, the door opening 10 is almost completely hidden by the swing door 9. Viewed from the outside and the side of the cabin 8, and along the length of the cabin 8, the door opening 10 begins approximately in the center of the cabin 8. The cabin 8 as a whole has the shape of an elongated upright rectangular prism, with the height of the cabin 8 being approximately equal to the length of the superstructure 4 as viewed in the longitudinal direction, and the width of the cabin 8 providing ample space for a seat with operating elements for a crane operator (not shown). The width of the cabin 8 corresponds to approximately half the height or length of the cabin 8. Corresponding to the rectangular prism shape of the cabin 8, it has a front 8a, a rear 8b, a left side 8c, a right side 8d, a floor 8e, and a roof 8f. In this case, the front 8a is oriented forward relative to the superstructure 4. In other words, the front 8a is positioned at the end opposite to the counterweight 4a of the superstructure 4. Except for the floor 8e, the front 8a, rear 8b, left side 8c, right side 8d, and roof 8f are each provided with a window panel 11 that is at least partially transparent, and the swing door 9 is provided with a door window panel 9a that is at least partially transparent.

[0028] Furthermore, as is evident from Figure 2, the flat roof 8f with the front window panel 11 is inclined downwards toward the rear from the front 8a to the rear 8b at an angle of inclination ranging from 5 to 20° relative to the floor 8e. This causes the upper horizontal cross profile 8g between the two front A-pillars of the cabin 8 (as a contour that obstructs the crane operator's viewing angle) to move upward, thereby improving the crane operator's viewing angle of the cabin 8 at any inclination, and thereby improving the overall viewing angle for tracking loads compared to other cabins. In addition, rainwater flows off the roof 8f more easily and does not drip into the cabin 8 from the front when the front window panel is open. Thus, any rainwater can flow off the roof 8f more easily. In the basic position of the cabin 8 that is not inclined, the floor 8e is oriented horizontally. Furthermore, the front half of the cabin 8 is composed of virtually, i.e., more than 80%, window panels 11 and door window panels 9a only, in order to facilitate the work of the crane operator as described above. All window panels 11 are tinted and further have shades provided on the inside, especially by roller blinds. In the region of the roof 8f, the window panel 11 is positioned between the right longitudinal profile 8i and the left longitudinal profile 8h of the cabin 8. It is also evident that the window panel 11 of the roof 8f has a triangular rear region 11b at the rear, which is not transparent and occupies approximately 20%, preferably 15%, of the window panel 11 of the roof 8f. The rear region 11b ends approximately midway along the length of the cabin 8, and therefore at the starting position of the door opening 10. Below this rear region 11b of the roof 8f, the upper guide lever 13c of the upper door mechanism 13, described below, pivots inside the driver's cab 2a. The longitudinal gap 10a for the upper guide lever 13c extends below the left longitudinal profile 8h and is therefore hidden by the left longitudinal profile 8h in Figure 2.

[0029] Figure 2 shows the swing door 9 in the closed position. To open the swing door 9, it first moves outward almost linearly from the closed position within the door opening 10 via the door mechanism described later, and then moves backward along the left side surface 8c in a uniform arc-shaped path. As a result, in the open position, the door opening 10 is opened almost completely, i.e., more than 90%.

[0030] Overall, the swing door 9 is designed as a frame with a door window panel 9a. The swing door 9 is substantially rectangular with a cornered bulge at the front, and the cornered frame consists of a rear frame 9c, first and second front frames 9d, 9e forming an obtuse angle, an upper frame 9f, and a lower frame 9g. This frame design is robust and designed to withstand twisting, ensuring that the swing door 9 opens and closes smoothly even when the cabin 8 is tilted. Furthermore, the frame design, consisting of profiles made by continuous casting, allows for the integration of design elements and additional functional elements. The cabin 8 is also constructed as a frame consisting of profiles made by continuous casting.

[0031] Furthermore, as shown in Figure 2, when the swing door 9 is in the closed position, the upper guide lever 13c of the upper door mechanism 13 extends from the swing door 9 into the interior of the cabin 8 through the starting point of the longitudinal gap 10a below the left longitudinal profile 8h, as seen from the outside. Alternatively, the upper guide lever 13c can be bent so that it extends through the door opening 10 when the swing door 9 is in the closed position. In a corresponding embodiment, the longitudinal gap 10a is adjacent to the door opening 10. In known embodiments, the longitudinal gap 10a is closed in a passable manner, for example, by two opposing rubber seals or a type of brush seal. Thus, the longitudinal gap 10a is closed and open only in the area of ​​the upper guide lever 13c. Also, the longitudinal gap 10a extends parallel to the roof 8f or the left longitudinal profile 8h and only to the door opening 10 in the rear region of the roof 8f.

[0032] Figure 3 shows a side view of the upward-tilted cabin 8 with the swing door 9 in the closed position. The cabin 8 is tilted upward by approximately 15° around the pivot axis S from the horizontal position. The continuous slewing range of the cabin 8 is 0 to 30°. Also, on the left side and the right side (not shown) 8c, 8d, the door window panel 9a and the window panels 11 in the lower regions 9b, 11a are not completely transparent for aesthetic reasons, but are preferably opaque and have a black backing. This does not impair the crane operator's 360-degree field of view. The same applies to the roof 8f, which has already been shown in Figure 2.

[0033] Figure 4 shows a further partially transparent perspective view of the right side 8d of the cabin 8 to show the closed swing door 9 from the inside, and the associated lower door mechanism 12 and upper door mechanism 13 within the floor 8e. For this purpose, the floor 8e is configured as a hollow floor having an inner upper floor surface facing the crane operator and a lower outer floor surface that forms the outer skin of the cabin 8. The lower door mechanism 12 is located within this cavity. Furthermore, the swing door 9 is additionally shown with hatching in the open position, moved rearward and nearly touching the left side 8c.

[0034] When the floor 8e is viewed from above, the lower door mechanism 12 has a substantially parallelogram-shaped structure. - A first lower support joint 12a is a pivot joint located at the rear lower end of the swing door 9 and having a vertical axis of rotation. - A second lower support joint 12b is a swivel joint located at the front lower end of the swing door 9 and having a similarly vertical axis of rotation. - A third lower support joint 12c is a swivel joint having a similarly vertical axis of rotation, positioned within the floor 8e and offset inward and rearward relative to the first lower support joint 12a. - A fourth lower support joint 12d is a swivel joint having a similarly vertical axis of rotation, positioned within the floor 8e and offset inward and rearward relative to the second lower support joint 12b. - A first support lever 12e is positioned in a manner that is articulated between a first lower support joint 12a and a third lower support joint 12c. - A second support lever 12f is positioned in a manner that is articulated between the second lower support joint 12b and the fourth lower support joint 12d.

[0035] The first and second support levers 12e and 12f are located in a common horizontal plane. The lower door mechanism 12 is dimensioned to support substantially all of the weight of the swing door 9. Between the open and closed positions, the first and second support levers 12e and 12f move approximately 70-75° around the respective third and fourth lower support joints 12c and 12d.

[0036] The upper door mechanism 13 has a different structure from the lower door mechanism 12 because it primarily serves a guiding function rather than a support function. The upper door mechanism 13 has a very simple structure. - A first upper guide joint 13a is a swivel joint located at the rear upper end of the swing door 9 and having a vertical axis of rotation. - A second upper guide joint 13b is a ball joint having a vertical axis of rotation, positioned on the roof 8f and offset inward and rearward with respect to the first upper guide joint 13a when the swing door 9 is in the closed position. - An upper guide lever 13c is positioned in a manner that is articulated between the first upper guide joint 13a and the second upper guide joint 13b. Viewed vertically, the first upper guide joint 13a and the first lower support joint 12a are arranged to overlap vertically, and their vertical axes of rotation are aligned with each other. Furthermore, the first upper guide joint 13a and the first lower support joint 12a are connected to each other via a support pipe 14, thereby stabilizing the lower and upper door mechanisms 12 and 13 with respect to each other. The support pipe 14 extends parallel to the rear frame 9c of the swing door 9, with a small gap between them, and is fastened only to the first upper guide joint 13a and the first lower support joint 12a. The support pipe 14 is not attached at the top to the roof 8f and at the bottom to the floor 8e, as in other door mechanisms. Unlike the lower door mechanism 12, the upper door mechanism 13 does not have third and fourth upper guide joints, nor does it have a second guide lever. The upper guide lever 13c guides the swing door 9 and, when the swing door 9 is in the closed position, holds the swing door 9 in the closed position via the arrangement of a second upper guide joint 13c positioned rearward on the roof 8f, that is, it presses the swing door 9 into the door opening 10.

[0037] Overall, it is clear that the swing door 9 is held and guided at a total of three points via the first and second lower support joints 12a, 12b and the first upper guide joint 13a. Furthermore, it is advantageous to transfer the support function to the lower door mechanism 12 and place it on the floor 8e, because this allows the upper door mechanism 13 to be designed in a structurally simple manner and does not obstruct the crane operator's omnidirectional view. The lower door mechanism 12 is covered from above by the intermediate floor. Also, the crane operator's upward view is not obstructed by the upper door mechanism 13, because a single second upper guide joint 13b is positioned on the roof 8f in a manner that is offset inward and significantly rearward relative to the first upper guide joint 13a. In relation to the length of the roof 8f, the second upper guide joint 13b is positioned in the rear third of the roof 8f. Thus, the window panel 11 of the roof 8f is not transparent except in a small rear region 11b.

[0038] The placement of the second upper guide joint 13b on the roof 8f, offset inward and rearward with respect to the closed swing door, particularly in an inward and rearward offset configuration, should be understood as follows: With respect to the length of the roof 8f, the second upper guide joint 13b is positioned adjacent to the door opening 10, particularly within 20-40%, preferably 25-35%, of the length of the roof 8f; with respect to the width of the roof 8f, it is positioned within 40-60%, preferably 45-55%, of the width of the roof 8f. In any case, the second upper guide joint 13b is not positioned vertically in the area behind the door opening 10, and in the area when viewing the closed swing door 9 from the outside. This placement is possible because the upper guide lever 13c of the upper door mechanism 13 is not guided through the door opening 10, but mainly through the longitudinal gap 10a to the outer swing door 8.

[0039] For this purpose, as is evident from Figure 4, when the swing door 9 is in the open position, the upper guide lever 13c (shown as a dotted line) of the upper door mechanism 13 extends from the inside, through one end of the longitudinal gap 10a below the left longitudinal profile 8h, and outwards from the cabin 8. When the swing door 9 is in the open position, the upper guide lever 13c does not extend through the door opening 10.

[0040] Figure 5 shows a plan view of the floor 8e of the cabin 8, which will be described with reference to the details of the lower door mechanism 12. In this case as well, as shown by the dotted line, the swing door 9 moves rearward to an open position, nearly touching the left side 8c. Between the first support lever 12e and the second support lever 12f, similarly via a vertical pivot axis, is an elongated strip-shaped connector 12g. The connector 12g stabilizes the parallelogram on the one hand and functions as a fastening base for a gas spring 12h, one end of which is supported by the second support lever 12f in the area of ​​the fourth lower support joint 12d and the other end of which is supported by the floor 8e in the area of ​​the first lower support joint 12a. Alternatively, the gas spring 12h may be provided on the first support lever 12e, or two gas springs 12h may be provided on each of the two support levers 12e and 12f. In this way, the gas springs 12h dampen the movement during opening and closing, thereby facilitating the manual opening and closing of the swing door 9. A damper 12i, which functions as an end stopper for the swing door 9 in the open position, is positioned between the floor 8e and the end of the first support lever 12e on the swing door side.

[0041] Furthermore, a locking brake 15 is provided that allows the swing door 9 to be fixed in a continuous manner at any position between the closed and open positions. For this purpose, a segment of the brake disc 15a is positioned concentrically with the first lower support joint 12a in the area of ​​the first lower support joint 12a. The brake disc 15a can be fixed in a continuous manner via a drive unit 15b and a brake shoe 15d. This type of locking brake 15 exhibits low wear. The brake is actuated via a drive unit 15b, which is an electric motor with a worm gear, and acts on the brake shoe 15d via a lever mounted in its position, through a linkage 15c that is linearly driven by the worm gear. The linkage 15c acts on the brake shoe 15d by pulling. The locking brake 15 allows the crane operator to adjust the swing door 9 to any open position for ventilation of the cabin 8 or for communication with the outside, even if the cabin 8 is tilted to an inclined working position. The swing door 9 is securely held in both the closed and open positions. The locking brake 15 prevents the swing door 9 from opening unintentionally as the cabin 8 tilts. The force of the locking action is adjustable via a spring 15e between the linkage 15c and the brake shoe 15d, and is selected so that the swing door 9 is fixed in any tilted position of the cabin 8, while still allowing emergency opening, especially from the outside, at any position. The locking force of the locking brake 15 can be adjusted via an adjustment screw 15f on the linkage 15c. In principle, it is also possible to design the locking brake 15 as a mechanical device.

[0042] The parallelogram design of the lower door mechanism 12, including the lengths of the two support levers 12e and 12f, and the arrangement of the third and fourth lower support joints 12c and 12d relative to the swing door 9, is optimized so that, when viewed in plan, the swing door 9 does not protrude as much as possible from the contour of the cabin 8. This ensures that access to the left side 8c or the platform in front of the door opening 10 is not restricted as much as possible. In the open position, the swing door 9 is almost touching the left side 8c. Figure 5 also shows that the front end of the swing door 9 moves along a circular, flat travel path B during opening and closing, resulting in the swing door 9 protruding from the door opening 10 up to three times its thickness during opening and closing. This ensures sufficient space for the crane operator to stand comfortably on the platform 16 while the swing door 9 is opening and closing. In the open position, the maximum distance between the swing door 9 and the left side 8c is only about 1.5 times its thickness.

[0043] By mounting the entire lower door mechanism 12 to the floor 8e in an adjustable manner, the swing door 9 can be adjusted inward and outward, as well as forward and backward, relative to the door opening 10.

[0044] Figure 6 shows a perspective view of the upper door mechanism 13. It can be seen that the first upper guide joint 13a is positioned on the rear frame 9c of the swing door 9 so that it can be adjusted vertically via an elongated hole. The same applies to the lower first support joint 12a. The support tube 14 is directly adjacent to the first support joint 12a. By mounting the second upper guide joint 13b, which is a ball joint with a vertical axis of rotation, on the roof 8f, the swing door 9 can be adjusted inward and outward, as well as forward and backward, relative to the door opening 10.

[0045] The adjustment options for the swing door 9 relative to the door opening 10 of the cabin 8 ensure that the swing door 9 makes planar contact with the door opening 10 through its seal. This reduces seal wear and ensures a reliable seal. The robustness of the swing door 9 due to its frame design means that there is less displacement relative to the door opening 10 during operation. Nevertheless, certain maintenance intervals are required. Readjusting the swing door 9 relative to the door opening 10 is simple and possible with a clear concept, thanks to the adjustment options in the areas of the lower and upper door mechanisms 12, 13 described above. These adjustment options also help to compensate for manufacturing tolerances during the initial adjustment of the swing door 9 relative to the door opening 10.

[0046] Figure 7 shows a perspective view of the lower region of the swing door 9. At the lower end, the swing door 9 has a recess 9d that extends across its entire width when viewed from the outside, providing more legroom for the crane operator. This improves stability on the platform 16 and positively impacts work safety.

[0047] In relation to this exemplary embodiment, a cabin 8 equipped with a swing door 9 has been described as a component of the vehicle crane 1. In principle, this cabin 8 equipped with the swing door 9 according to the present invention can also be used in mobile work machines, in particular construction machines such as excavators. It is also possible to equip the driver's cab 2a of the vehicle crane 1 with the swing door 9 according to the present invention. Furthermore, the terms “horizontal” and “vertical” selected in the description of the above exemplary embodiment refer to a cabin 8 oriented horizontally and a floor 8e oriented horizontally, respectively. In addition, the lower door mechanism 12 can be designed to be electrically driven. For this purpose, it is provided that an electric motor engages with a third lower support joint 12c. [Explanation of Symbols]

[0048] 1. Vehicle crane 2 Lower carriers 2a Driver's cab 3 wheels 4 Superstructure 4a Counterweight 5 Telescopic Jib 6 Jib parts 6a Basic Box 6b Internal box 7 Hoist Cable 8 cabins 8a front 8b Back 8c Left side 8d Right side 8e floor 8F Roof 8g Cross Profile 8h left longitudinal profile 8i Right Longitudinal Profile 9 Swing Doors 9a Door window panel 9b Lower area 9c rear frame 9d recess 9d First front frame 9e Second front frame 9f Upper frame 9g lower frame 10 Door opening 10a Longitudinal gap 11 Window board 11a Lower area 11b Posterior area 12. Lower door mechanism 12a First lower support joint 12b Second lower support joint 12c Third lower support joint 12d Fourth lower support joint 12e First support lever 12f Second support lever 12g connector 12h gas spring 12i damper 13 Upper door mechanism 13a First upper guide joint 13b Second upper guide joint 13c Upper Guide Lever 14 Support tube 15 Locking Brakes 15a Brake Disc 15b Drive unit 15c linkage 15d Brake Shoes 15e Spring 15f adjustment screw 16 platforms B Travel Route S Pivot Axis U ground W undulation axis

Claims

1. A cabin (8) of a vehicle crane (1) comprising a swing door (9) that is fastened to the cabin (8) via a lower door mechanism (12) and an upper door mechanism (13) and movable between a closed position and an open position, wherein the upper door mechanism (13) has a single upper guide lever (13c) that is fastened to the swing door (9) via a first upper guide joint (13a) and to the cabin (8) via a second upper guide joint (13b), and the second upper guide joint (13b) is positioned offset rearward with respect to the swing door (8) in the closed position.

2. A cabin (8) according to claim 1, characterized in that the second upper guide joint (13b) is positioned relative to the length of the roof (8f) in the range of 20 to 40%, preferably 25 to 35%, of the length of the roof (8f), and is positioned relative to the width of the roof (8f) in the range of 40 to 60%, preferably 45 to 55%, of the width of the roof (8f).

3. A cabin (8) according to claim 1 or 2, wherein the roof (8f) is designed in the form of a window having a window panel (11) that is at least partially transparent.

4. A cabin (8) according to any one of claims 1 to 3, wherein the second upper guide joint (13b) is located on the roof (8f) of the cabin (8).

5. A cabin (8) according to any one of claims 1 to 4, wherein the lower door mechanism (12) is designed in the shape of a parallelogram.

6. A cabin (8) according to claim 5, wherein the lower door mechanism (12) has a first support lever (12e) and a second support lever (12f), the first support lever (12e) is fastened to the swing door (9) via a first lower support joint (12a) and to the cabin (8) via a third lower support joint (12c), and the second support lever (12f) is fastened to the swing door (9) via a second lower support joint (12b) and to the cabin (8) via a fourth lower support joint (12b).

7. A cabin (8) according to claim 6, wherein a gas spring (12h) is assigned to the lower door mechanism (12) and dampens the movement of the swing door (9) between the closed position and the open position.

8. The cabin (8) according to claim 7, wherein the gas spring (12h) is arranged in an articulated manner between the first support lever (12e) or the second support lever (12f) and the floor (8e) of the cabin.

9. A cabin (8) according to any one of claims 6 to 8, characterized in that a support pipe (14) is disposed between the first lower support joint (12a) and the first upper support joint (13a).

10. A cabin (8) according to any one of claims 6 to 9, characterized in that a damper (12i) is assigned to the lower door mechanism (12) and dampens the movement of the swing door (9) in the open position region.

11. A cabin (8) according to any one of claims 1 to 10, characterized in that the movement of the swing door (9) between the closed position and the open position is lockable by a locking brake (15).

12. A cabin (8) according to claim 11, wherein the locking brake (15) is operated electrically and / or in a continuous manner.

13. A cabin (8) according to any one of claims 1 to 12, wherein the swing door (9) is manually movable between the closed position and the open position.

14. A cabin (8) according to any one of claims 1 to 13, wherein the cabin (8) is tiltable with respect to a work machine about a horizontal pivot axis (S).

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