CN107264650B

CN107264650B - Self-propelled machine, in particular construction machine, comprising an adjustable cab and method for adjusting the cab of a self-propelled machine

Info

Publication number: CN107264650B
Application number: CN201710221413.6A
Authority: CN
Inventors: S·库恩
Original assignee: Bomag GmbH and Co OHG
Current assignee: Bomag GmbH and Co OHG
Priority date: 2016-04-06
Filing date: 2017-04-06
Publication date: 2021-07-20
Anticipated expiration: 2037-04-06
Also published as: CN107264650A; DE102016010660A1

Abstract

The invention relates to a self-propelled machine, in particular a construction machine, comprising: a drive motor; a machine frame; a travel device coupled to the machine frame; and an operator's station disposed in the cab, the cab including side walls, a top wall, a front wall, a rear wall, and a cab bottom; and the cab can be adjusted between a lowered transport state and a raised operating state by means of the adjusting device. The invention further relates to a method for adjusting a cab between a lowered transport state and a raised operating state.

Description

Self-propelled machine, in particular construction machine, comprising an adjustable cab and method for adjusting the cab of a self-propelled machine

Technical Field

The invention relates to a self-propelled machine, in particular a construction machine, comprising an adjustable cab and a method for adjusting the cab of a self-propelled machine, in particular a construction machine.

Background

An optimal machine field of view is generally desired during operation of a self-propelled machine, in particular a construction machine. For this reason, such self-propelled machines usually have a prominently arranged operating table, from which the operator of the self-propelled machine has a good view of the machine itself and the adjacent surroundings. While such self-propelled machines are often cumbersome and therefore difficult to transport. Transport regulations, in particular for public road transport, usually allow only a limited transport height for the machine, in particular when the machine is loaded in a trolley. For this reason, it is known, for example, to use a foldable roof construction (e.g. weather-resistant roof) of the console cover, which makes it possible to adjust the console roof between a flat transport state and an upright working state. The roof structure is usually lowered in the transport state, so that it requires only little space, in particular in the vertical direction, and is erected in the operating state, so that the driver of the machine can be protected from the operating position. Such structures are described, for example, in DE102008047583a1 and DE102013005832a1, to which reference is made in the present application. Instead of a console which is only covered on the top, it is also known to use a so-called cab. Such a cab is therefore characterized by a wrapped operator station having an interior space surrounded by side walls, a top wall, a front wall, a rear wall and a cab bottom. The cab is very comfortable for the driver due to the closed and substantially shielded configuration from the outside environment. It is thus possible, for example, to install an air conditioner in the cab. Furthermore, a very effective dust and/or sound protection is achieved via the cab. However, the above-mentioned transport problems also exist in machines with a cab. It is therefore also known for the cab to be adjusted as a whole between the operating state and the transport state, for example by being raised and lowered. This is described, for example, in DE 102006017516a 1. A disadvantage of an adjustable cab of this type is, in particular, that a considerable amount of free space must be left on the machine in order to be able to move the cab as a whole onto the machine frame into the lowered position. The mechanical structure required for the adjustment movement of the cab is furthermore rather complicated.

Disclosure of Invention

The object of the invention is to provide a possibility to transfer the cab from the working position into the transport position as space-saving as possible.

This object is achieved with a self-propelled machine and a method according to the invention.

The self-propelled machine according to the present invention includes: a drive motor; a machine frame; a travel device coupled to the machine frame; and an operator's station disposed in the cab, the cab including side walls, a top wall, a front wall, a rear wall, and a cab bottom; and the cab can be adjusted between a lowered transport state and a raised operating state by means of an adjusting device, it being provided according to the invention that at least the side walls, the top wall, the front wall and the rear wall can be moved relative to the machine frame between the transport state and the operating state of the cab by means of the adjusting device, the adjusting device being designed such that the relative position of at least the front wall and/or the rear wall relative to the top wall and/or the side walls changes when the cab is adjusted between the transport state and the operating state, and the adjusting device being designed such that the side walls of the cab are arranged upright in the transport state and in the operating state.

According to the method according to the invention for adjusting a cab between a lowered transport state and a raised operating state, between the transport state and the operating state only a part of the cab is adjusted relative to the machine frame by means of the adjusting device in such a way that the relative position of at least the front wall and/or the rear wall relative to the top wall and/or the side walls changes when the cab is adjusted between the transport state and the operating state, and the adjusting device is designed in such a way that the side walls of the cab are arranged upright in the transport state and in the operating state.

The invention therefore relates to a self-propelled machine comprising: a drive motor; a machine frame; a travel device coupled to the machine frame; and an operation panel provided in the cab. The drive motor also supplies the drive energy required for the driving movement of the machine. The cab is a unitary body including side walls, a top wall, a front wall, a rear wall, and a cab bottom. The cab bottom represents the seating surface of the cab, the top wall represents the roof part, the front wall represents the wall delimiting the cab in the working or advancing direction, and the rear or rear wall represents the opposite wall element. The side walls are the right and left sides of the cab transverse to the direction of travel of the machine and preferably extend in the vertical direction from the cab bottom up to the roof. The side walls thus extend generally longitudinally in the vertical direction. The side walls thus have a vertical position. In addition, the side walls preferably extend between the leading and trailing walls. These walls are in particular formed by a rigid material (for example a metal frame) and a plate (which is in particular supported by a plastic or glass-plastic composite). These walls are preferably not made of canvas or other flexible material or at least a rigid frame in the present invention. The invention also comprises a cab which is delimited on at least one side and in at least one wall region by a part of the machine frame. In particular the cab wall elements currently serving as front wall and as rear wall therefore do not necessarily have to extend completely from the top wall to the cab bottom of the cab. However, it is also possible for wall elements to be present, in particular in the front and/or rear region, which project from the cab floor in the vertical direction, to which the respective wall element, in particular the front wall and/or the rear wall, is articulated. Furthermore, the cab is preferably mounted in a vibration-damped manner relative to the machine frame, for example by means of suitable damping bearings. The console base forms a support console or a cab base console for the remaining cab elements, in particular at least for the rear wall and the front wall.

An important aspect of the invention is that the adjusting device (by means of which the cab can be adjusted between the lowered transport state and the operating state of the projection) is designed such that only a part of the cab can be moved relative to the machine frame between the transport state and the operating state of the cab. It is therefore essential, above all, that the cab according to the invention is not moved from the transport position to the operating position in its entirety and in the same way as for the wall elements described above, but that the cab is only partially and in particular its side walls. Since not all elements of the cab are adjusted in the same way, a particularly space-saving division of the cab on the machine in the transport state can be used. It is therefore not necessary to maintain a considerable free space on the machine in order to fully accommodate the cab in the transport state. The cab is in other words partially disassembled on the machine from the operating state into the transport state, for example by a corresponding swiveling movement or adjustment of parts which significantly enlarge the outer dimensions of the machine, such as for example the top wall, the front wall, the rear wall and at least the upper part of the side walls. Components of the cab which have hardly affected the outer dimensions of the machine in the operating state (for example parts of the cab floor and/or the front and rear regions of the cab) also need not be configured to be adjustable in order to achieve a favorable transport state of the cab. According to the invention, it is therefore provided that at least the side walls, the top wall, the front wall and the rear wall are movable between the transport state and the operating state of the cab relative to the machine frame via an adjusting device, which is designed such that the relative position of at least the front wall and/or the rear wall relative to the top wall and/or the side walls changes when the cab is adjusted between the transport state and the operating state. The individual wall elements of the cab can thus be brought directly into a further relative position on the machine from the cab operating state, which takes up a considerable amount of space, in which the cab has a lower space requirement on the machine. The adjusting device which is present for this purpose according to the invention generally represents a device with which the relative position of the cab elements with respect to one another can be changed between the operating position and the transport position in the manner described above. For this purpose, the adjusting device has, in addition to the transmission elements, such as hinges, connecting rods, a drive, such as an electric motor, a hydraulic cylinder or the like, as described in more detail below. The adjustment device thus generally enables the cab to be moved between the operating state and the transport state in the manner described above.

The invention relates in particular to a so-called closed cab. This means that the cab is designed in the operating state in such a way that it provides a defined and substantially shielded working space relative to the outside environment, from which the machine operator can control the machine functions. This closed and therefore comparatively large cab structure is ideally no longer available in the transport state. It is therefore preferred that the individual elements of the cab no longer form a closed cab in the transport state.

In addition or alternatively, it is particularly preferred, however, if the individual elements of the cab are connected to one another both in the transport state and in the operating state, as before, even in different positions relative to one another in space. The cab can thereby be adjusted particularly comfortably, as will be explained in more detail below.

In a preferred embodiment of the invention, it has proven advantageous if a corresponding configuration of the adjusting device is provided such that the side walls of the cab are configured substantially upright in the transport state and in the operating state. This arrangement (in particular in the transport state) is firstly not plausible, since with the standing arrangement the height extension of the side walls is, as before, considerable. However, it has proven to be possible in this case to achieve a particularly space-saving installation of the side walls, in particular on the machine side. This is particularly advantageous when the side walls have an end position displaced substantially parallel between the operating state and the transport state by means of the adjusting device. The substantially parallel shifted terminal positions are present in the following cases: the vertical axis of the side wall is deflected from the operating position into the transport position by less than 25 °, in particular by less than 15 °, and very particularly preferably by less than 10 °. When "parallel shift" is mentioned next, this means a "substantially parallel implemented movement" according to the above-mentioned criteria. The side walls are therefore preferably not folded and also not turned over on the machine in other ways according to the invention, but rather are placed (in particular in a vertical position) in a substantially parallel-shifted end position on the machine in the operating state and in the transport state.

The cab floor of the cab is preferably stationary on the machine and is therefore not adjusted on the machine when adjusting between the transport state and the operating state. In this connection, the above-described parallel displacement of the side wall is therefore particularly preferably also effected in relation to the cab floor of the cab. The stationary arrangement of the cab floor now in particular also includes a vibration-decoupled mounting of the cab floor on the machine frame, for example via suitable damping means, for example rubber bearings or the like.

In principle, the components of the cab can also be designed to be movable linearly relative to the machine frame between a transport position and an operating position of the cab. Preferably, however, the front wall and/or the rear wall rest in a rotationally articulated manner on the top wall and the machine frame, in particular about an articulation axis extending horizontally and transversely to the longitudinal direction of the machine. It is thus possible for the front wall and/or the rear wall to be folded in relation to the top wall and the machine frame, whereby the front wall and/or the rear wall are folded together with the top wall in a particularly space-saving manner. The front wall and/or the rear wall are therefore particularly preferably arranged on the machine frame of the self-propelled machine at their mutually opposite ends in a likewise rotationally articulated manner.

The structure of the top wall may also vary. It is for example possible for the top wall to be constructed as a substantially integral component. Preferably, however, the top wall has a top wall frame and a top shell. The top wall frame provides a supporting structure and is for example preferably also the part of the top wall which is connected to the front wall and the rear wall preferably via a hinge, in particular via a swivel hinge. For this purpose the top wall frame may have two separate connecting beams or an integral structure, for example a trapezoid. The roof housing serves instead to substantially enclose the cab upwards and is preferably fixed to the roof frame. The top wall frame may be, for example, a plastic piece. In a further preferred alternative embodiment the top wall substantially comprises only one top shell. The side walls are here directly connected to the front wall and/or the rear wall, for example via a hinged connection.

Preferably the front wall and/or the rear wall is adjustable relative to the side walls of the cab between a transport state and an operating state of the cab. This means that the front wall and/or the rear wall preferably executes a further and for example non-parallel displacement adjusting movement between the transport state and the operating state. This represents the concept of the invention, i.e. the individual components of the cab are not adjusted differently between the transport state and the operating state in their entirety, but in sections.

In particular, it is particularly advantageous if the side walls are suspended from the top wall, in particular the top wall frame of the top wall, and form a rigid whole or subunit therewith, for example. The side walls, which preferably extend longitudinally in the vertical direction, are therefore connected to the top wall in their upper region and preferably form a U-shaped unit overall in cross section, the arms of which are formed by the side walls and the base of which is formed by the top wall which is located at the top in the vertical direction. In order to adjust the cab between the operating state and the transport state, provision is preferably made for: the integral unit formed by the top wall and the side walls is adjusted as a whole on the machine between a working condition and a transport condition, for example displaced or turned substantially parallel. This is achieved in particular in that the two side wall elements surround the machine frame in an outward clip-like manner and are deflected upward from a lowered transport position into a projecting operating position. The side walls may be fixedly connected with the top wall or may also be suspended from the top wall, in particular the top wall frame, via suitable suspension means. The side walls may also be re-unwrapped as desired. The adjustment of the cab between the operating position and the transport position is always carried out with the side walls suspended, so that for this purpose the side walls must not be unhooked or unhooked.

In order to allow easy and comfortable access to the interior of the cab, at least one of the side walls is provided with an access door and a frame. It is provided within the scope of the invention that the access door forms a side wall together with the frame and is ideally displaceable substantially parallel between a transport state and an operating state of the cab with the access door closed.

The specific adjustment movements can be combined and driven in different ways. The adjustment device used in each case can thus be varied in a wide variety of ways, as long as it can achieve a defined adjustment of the cab element to be adjusted between the operating state and the transport state relative to the machine frame. For this purpose, the adjusting device preferably has the form of a pivoting drive, in particular a hinge-linkage drive. This type of articulated link transmission is characterized by a low space requirement and at the same time by its high functional reliability. Preferably, in particular the front wall and/or the rear wall and/or the top wall itself form part of the deflection gear. A particularly compact construction of the cab of the invention can thus be achieved. Furthermore, the adjustment gear is preferably driven, for example, by means of at least one hydraulic cylinder. In this way, the adjustment process can be automated and thus simplified for the user.

In particular the adjustment device is ideally a four-hinge linkage comprising two links and a coupling member. In this case, in particular one side wall is suspended in each case on a coupling piece (which is preferably formed by the top wall and in particular by its top wall frame) and/or the connecting rod is formed by the front wall and/or the rear wall. Accordingly, the machine frame, on which the front wall and the rear wall are articulated, or the cab floor or a cab floor support wall projecting from the floor surface (in particular as part of a cab floor console supported in a vibration-decoupled manner, in particular with respect to the machine frame) forms the base.

In addition or alternatively, it is also preferred that the side walls in the direction of their displacement movement from the operating position into the transport position or in the respective displacement direction in the horizontal reference plane are inclined relative to the machine center in terms of their longitudinal extent, in particular at an angle of less than 4 °, in particular preferably less than 5 °, in particular at most 30 °, and in particular at most 10 ° (the inclination in the horizontal plane toward the machine center relative to a reference line extending in the operating direction). This makes it possible on the one hand for the driver to also look diagonally forward through the side wall or the window present there and thus to achieve an improved machine view. On the other hand, the side walls can then be pulled into a stable end position or respectively a stop on the front and/or rear wall during the erection from the transport position into the operating position, in particular when the adjusting movement has at least one horizontal component in a direction corresponding to the longitudinal extent of the machine center or in the opposite direction. This facilitates the resulting closed cab when adjusting from the transport position to the operating position.

The maximum width of the self-propelled machine is usually limited by legal provisions. The cab preferably extends in its widest position over the entire width of the self-propelled machine in order to provide the driver with optimal viewing conditions. In order to be able to adjust the side walls essentially by means of a substantially parallel displacement on the machine frame, it is preferably provided that at least one adjustment recess for at least one of the side walls is present in the machine frame, into which adjustment recess the at least one side wall can be moved when being adjusted from the operating state to the transport state. The adjustment recess thus represents a region of the machine in which the machine or its machine frame, in particular viewed in the horizontal plane, is narrower than the remaining regions. The outer wall of the machine frame is thus retracted toward the center in the region of the adjustment recess. In this way, without increasing the overall width of the machine, a receiving space for the side walls is provided, which are displaced substantially parallel to one another on the side of the machine, for example, when the side walls are adjusted from the operating position into the transport position.

The main advantages of the cab over other operator stations are generally its stability and protection for the driver located in the cab against external environmental factors, such as pollution and noise. In order to stabilize the cab, in particular in the operating state, form-locking devices are preferably present, which engage in one another in a form-locking manner, in particular when the cab is in the operating state, and which, for example, impart sufficient stability to the cab. A form-locking device of this type can be arranged in particular between the front wall and at least one of the side walls and/or between the rear wall and at least one of the side walls and/or between the cab floor and at least one of the side walls. The form-locking device therefore represents an auxiliary device via which a defined end position of the respective element of the cab can be achieved. Such a form closure can furthermore be used for sealing purposes in order to improve the sound insulation and/or the dirt protection of the cab in the operating state. The preferred form-locking means can be, for example, sliding guides, such as sliding ramps or the like, which bear against the stop and/or are oriented toward a defined end position. The form-closure device may furthermore comprise additional sealing means, such as sealing lips. In addition or alternatively, it is accordingly preferred that the cab and the wall elements adjoining one another in particular in the operating state have an abutment seal, for example a rubber or plastic lip, which seals off a gap between these wall elements, in particular between the front wall and the side wall and/or between the rear wall and the side wall and/or between the cab floor and the side wall.

Furthermore, at least one locking device is preferably provided, with which the side walls and/or other elements of the cab are fixed, in particular when the cab is in the operating state and/or in the transport state. The locking device can in particular additionally fix the position of the cab in the operating state and/or the transport state. The locking device can, for example, have suitable retaining latches, retaining clips or the like. The locking device may in particular comprise a position fixing device for the top wall and/or the front and/or rear panel in the transport position. A preferred position is here the front cover of the machine when, for example, the top wall and/or the front panel is deflected onto the front cover in the transport state. The same applies to the rear cover for the rear panel and/or the top wall when one or both of these parts of the cab are deflected onto the rear cover in the transport state. The operation of the locking device is effected manually or automatically, in particular with a suitable control unit.

The operation of the adjustment of the cab from the operating state to the transport state and/or vice versa is preferably effected outside the cab. For this purpose, for example, an external operating device can be provided, via which the corresponding adjustment of the cab can be effected, ideally at a height that is accessible from the ground. In the case of automatic adjustment, a suitable control panel can be provided, for example.

In order to increase the operational safety, it is preferably provided that at least one sensor is present, with which the attainment of the operating state and/or the transport state of the cab, in particular of at least one of the side walls, can be detected. Such a sensor may be, for example, a pressure contact switch or the like. Such a sensor is also suitable in particular for controlling the automatic adjustment of the cab from the transport state to the operating state, in particular by means of a control unit which coordinates and monitors the adjustment process.

For safety reasons, it can also be provided that the machine is operated and/or the work operation is possible only when the cab is in the working position. This can be achieved, for example, by means of suitable machine controls and sensors such as those mentioned above. In addition or alternatively, the adjustment of the cab from the operating state is only possible when the machine is stopped and/or the working device is switched off, for which purpose suitable sensors and a correspondingly designed machine control device can likewise be used. In addition or alternatively, it can also be provided that the adjustment of the cab from the operating state to the transport state is only possible if no person is present in the cab. For this purpose, for example, a region monitoring device of the interior of the cab can be provided, for example, via a motion and/or infrared sensor, which is likewise provided on the respective machine control or at least one control unit for controlling the adjustment of the cab between the operating state and the transport state.

In principle, it is possible for the side walls to be connected only via, in particular, their upper sides to the top wall, in particular to the top frame, and to be brought from the operating state into the transport state or vice versa, in a substantially cantilevered manner otherwise. In order to provide a defined adjustment of the side walls, it can, however, also be provided in addition that at least one guide, for example a slide, a slot or the like, is provided, with which the adjustment movement of the side walls between the transport state and the operating state (in particular on the machine frame) is guided. The side walls engage corresponding guide means for this purpose, for example with guide projections. The same applies to the front wall and/or the rear wall.

The cab according to the invention is suitable for use in ground milling machines, in particular stabilizers, finishing machines, road milling machines or surface miners, roller presses, road building machines or harvesters. These types of machines thus form a preferred further development of the invention.

A further aspect of the invention finally also consists in a method for adjusting the cab between a lowered transport state and a raised operating state. For supplementary explanation of the method according to the invention, reference is made here to all embodiments for constructing a machine according to the invention. The method according to the invention is therefore characterized firstly in that it comprises adjusting the cab between the working condition and the transport condition with the machine according to the invention. The main idea of the invention is that only a part of the cab, not the cab as a whole, is adjusted between the transport state and the operating state. In this case, it is provided that the part of the cab is adjusted, in particular by means of an adjusting device, between the two end positions of the cab, namely the transport state and the operating state, in such a way that the relative position of at least the front wall and/or the rear wall relative to the top wall and/or the side walls changes when the cab is adjusted between the transport state and the operating state. In this case, it is preferred that the cab wall is displaced essentially parallel between the transport state and the operating state, in particular via the adjustment gear (for this purpose, reference is made to the previous description). The side walls of the cab are thus not folded or tilted, in particular, but are adjusted substantially parallel to the machine frame. It is thereby possible to adjust the cab between a space-saving transport state and a desired operating state in which the driver can be located in the cab.

In this case, it is preferred that the cab be partially tilted when being adjusted from the operating position to the transport position. It is therefore preferred that during the adjustment of the side walls, an adjustment of the rear wall and/or the front wall relative to the side walls is also effected. The adjustment movements of the side walls and the front and/or rear wall are not effected in the same direction. If according to the invention it is provided that the side walls are displaced parallel to the machine frame between the operating position and the transport position, it is preferred, in particular for the rear wall and/or the front wall of the cab, for them to be pivoted about a pivot axis which extends, in particular, horizontally.

Furthermore, the method according to the invention is preferably carried out in such a way that the elements of the cab, the side walls, the roof, the front wall, the rear wall and the cab floor remain connected to one another. The adjustment of the deflection of the individual elements of the cab is therefore suitable for carrying out the method according to the invention.

In a preferred further development of the method according to the invention, the side walls are deflected into a form-locking connection with the rear wall and/or the front wall when the operating state is reached. By means of this form-locking connection, on the one hand an increased stability and, on the other hand, an improved sealing of the interior of the cab from the outside environment is achieved. The form-locking connection, in particular the form of the end stop, is therefore characterized in particular by the fact that the form-locking of the side walls with the rear wall and/or the front wall is closed as the operating state is reached.

Drawings

The invention will be explained in more detail below with the aid of embodiments shown in the drawings. The figures show:

FIG. 1 shows a side view of a self-propelled machine with a cab in an operating condition;

FIG. 2 shows a side view of FIG. 1 with the cab in a transport state;

fig. 3 shows an oblique perspective view from the oblique front of the cab according to fig. 1 in the operating state;

fig. 4 shows an oblique view in perspective obliquely in front of the cab in the operating state according to fig. 2;

FIG. 5 shows a top view of a portion of the machine of FIG. 1 with the cab in an operational condition;

FIG. 6 shows a top view of a portion of the machine of FIG. 5 with the cab in a transport condition;

fig. 7 shows a perspective side view of the cab in the operating state according to fig. 1, 3 and 5 with the access door open; and

fig. 8 shows a flow chart of a method according to the invention.

Detailed Description

Fig. 1 to 7 first show an exemplary embodiment of a self-propelled machine 1, in particular a ground milling machine, in the present case a road cold milling machine. The main components of the road cold planer are a machine frame 2, a travel device 3 (which may be a chain and/or wheel drive) connected to the machine frame via a lifting column, a working device 4, an operating platform 5 and a drive motor 6 (in particular a diesel engine), which provides the drive energy required for the travel drive and for the drive of the working device 4. In the working mode, the self-propelled mechanism 1 is driven by its own drive in the working direction a and the ground is milled by means of the working device 4. The working device 4 is in particular a milling wheel (not shown in the figures) arranged in a milling wheel box. Furthermore, a conveyor belt suspension 13 is present, on which, for example, a loading conveyor belt extending forward in the working direction a can be suspended.

The console 5 is surrounded by a closed cab 7. The cab 7 is arranged substantially centrally on the self-propelled machine 1 with reference to a longitudinal extension direction extending in the working direction a and comprises a front wall 8, a top wall 9, a rear wall 10 and side walls 11. The side walls 11 extend in the vertical direction from the top wall 9 to the cab floor 12 of the cab. The vertical axis of the side wall 11 is indicated with V and extends vertically along the door hinge at the current side plate. In contrast, the front wall 8 and the rear wall 10 extend to the bottom of the cab floor and correspond approximately to half the height of the side walls 11 in terms of their extent in the vertical direction. The cab 7 is therefore respectively embedded in the machine frame 2 or a respective machine cover and is supported on the machine frame 2 via the cab floor 12, in particular entirely via vibration-damped bearings. The front wall 8, the top wall 9, the rear wall 10, as well as the side walls 11 and the cab floor 12 thus enclose an interior space in which the operating floor 5 is arranged and form the closed cab 7 in the relative position shown in fig. 1. The cab is therefore weather-resistant and temperature-adjustable, for example.

The front wall 8, the top wall 9, the rear wall 10 and the side walls 11 are constituted as a substantially rigid single element. In particular the front wall 8, the rear wall 10 and the side walls 11 comprise a frame and a transparent plate mounted in the frame, respectively. The top wall 9 optionally also comprises a frame and an opaque top panel or only a top panel when the side panels 11 are connected with the front wall 8 and the rear wall 10, respectively, via hinges.

It is important that the cab 7 is adjustable between the raised operative condition shown in fig. 1 and the lowered transport condition shown in fig. 2. As can be seen from a comparison of fig. 1 and 2, the cab 7 projects in the operating state according to fig. 1 from the machine frame 2 in the vertical direction, so that there is an optimum view for the operator in the operating table 5. In the transport state, the cab 7 is lowered with reference to the vertical direction of extension, so that the self-propelled machine 1 is substantially flat overall and is therefore suitable for space-saving transport. For further explanation, the previous positioning of the cab in the operating state is shown in dashed lines in fig. 2. It can clearly be seen that the overall height of the machine 1 in the transport state according to fig. 2 is significantly smaller than in the operating state of the cab 7 according to fig. 1.

Between the operating state according to fig. 1 and the transport state according to fig. 2, the cab is partially deflected forward and downward in the operating direction a, in particular with its front wall 8, top wall 9, rear wall 10 and side walls 11. This is further illustrated by arrow B. In contrast, in particular the cab floor 12 of the cab 7 does not move relative to the machine frame 2 and maintains its position in the machine frame. The individual components of the cab, namely the front wall 8, the top wall 9, the rear wall 10 and the side walls 11 and the cab floor 12, thus change their relative position with respect to one another overall during adjustment, while the associated functional units connected to one another remain. Fig. 2 in particular also shows that the closed nature of the cab of fig. 1 is no longer present in the transport state. The cab is broken down into a relative arrangement that saves frames on the machine without disassembling the individual cab elements.

In particular, the front wall 8, the top wall 9 and the rear wall 10 mutually constitute an adjustment device 14 in the form of a four-hinge linkage and having a hinge point G1 (between the cab floor 12 and the front wall 8), a hinge point G2 (between the front wall 8 and the top wall 9 (or the side wall 11)), a hinge point G3 (between the top wall 9 (or the side wall 11) and the rear wall 10) and a hinge point G4 (between the rear wall 10 and the cab floor 12). Each hinge point G1 to G4 thus represents a hinge of a four-hinge linkage, the axis of rotation of which extends horizontally and transversely to the working direction a (i.e. parallel to the axis of rotation of the milling wheel arranged in the milling wheel box 4). The course of the individual elements of the four-joint linkage between the pivot points G1 to G4 is indicated in fig. 1 and 2 by dashed lines. In particular, the front wall 8, the top wall 9 (or the side walls 11) and the rear wall 10 thus each form an element of a four-joint linkage, wherein the top wall 9 (or the side walls 11) form the coupling. The base of the transmission is formed by the cab floor 12 (or, if vibration decoupling is not desired, also by the machine frame 2). For support purposes, support beams 15 and 16 are therefore provided on the cab floor 12, which extend approximately to half the height of the upright cab 7 and on the upper side of which the front wall 8 is hinged via a hinge point G1 and the rear wall 10 is hinged via a hinge point G4 to the cab floor 12 of console type.

It is evident from the present exemplary embodiment that the side walls 11 do not perform the tilting movement that is worth mentioning when the cab is adjusted from the operating position to the transport position, but rather move substantially parallel along the machine frame 2. This is achieved in that the side walls 11 are suspended from the roof wall 9 (or the side walls 11) only on their upper sides in the vertical direction and are free relative to the cab floor 12. A substantially parallel displacement of the side walls 11 between the operating state and the transport state is thereby achieved by a substantially parallel guidance of the top wall 9, which is obtained via a four-joint linkage transmission. In practice, the side wall 11 is deflected at its vertical axis V by a minimum of approximately 3 °, as indicated in fig. 2 by the angle α (the dashed line here represents the true extension of the vertical axis V and the solid line represents the extension of the parallel displacement of the vertical axis of the side wall 11 of fig. 1).

Independent of the specific embodiment, the essential basic concept of the invention is therefore shown in the figures (the cab 7 is not entirely complete as a whole, but only part of the cab is moved from the operating state to the transport state). Only in the operating state is the cab 7 completely fitted together and surrounding the operating floor 5. In the transport state, on the other hand, the cab 7 is partially disassembled and, in particular, the vertically projecting side walls 11 are lowered forward on the machine frame in the working direction a to the height of the rest of the machine in the present exemplary embodiment by the above-described adjusting movement. The cumbersome folding movement of the side walls 11 can be eliminated here, since the side walls are moved essentially vertically to the level of the rest of the machine.

Fig. 3 and 4 illustrate this flow of fig. 1 and 2 in a perspective oblique view with the left side obliquely in front. Fig. 3 corresponds here to the operating state according to fig. 1 and fig. 4 corresponds to the transport state according to fig. 2. It is important that the machine 1 has an adjustment recess 17 which is arranged on the machine frame 2 and forms a deflection free space for the side wall 11. Such adjustment recesses 17 are present on both sides of the machine 1. In the region of the adjustment recess 17, the machine space 2 and the covering part present there are formed narrower in terms of their width B, i.e. in terms of their extent in the horizontal plane transversely to the working direction a, than in the remaining region of the machine. This is indicated by the widths B1, B2, B3. B1 denotes the maximum width B of the machine, which in the present exemplary embodiment is obtained in the region behind the cab. In the direction of deflection of the cab 7, i.e. before the cab in the operating state in the operating direction a, there is an adjustment recess 17 with a width B2, which is considerably smaller than the width B1. This makes it possible in particular to pivot the side wall 11 into the adjustment recess 17 by the above-described substantially parallel displacement when adjusting from the operating state into the transport state, without the maximum width B1 of the machine being increased in this case. In the working direction a, the adjustment recess 17 in turn adjoins a wider machine frame part, which has a width B3, which may in principle also correspond to the machine width B1, for example. At the present time the width B3 remains slightly narrower than the width B1, so that an optimal view on the machine 1 can be achieved. Overall, the adjustment recess 17 extends from the console 5 and thus up to a short distance in front of the lifting column of the front chassis (covered by the machine frame part in the drawing).

Fig. 4 furthermore shows the principle design of one of the wall elements 8 to 11, for example the rear wall 10 (wherein the front wall 8 and the side walls 11 have a similar basic structure). A frame 25 with two side beams 26, a bottom beam 27 and an upper beam 28 (covered by the top wall in fig. 4) encloses a transparent plate 29. So that especially also the side walls 11 have a similar frame 25 and transparent plates.

Fig. 5 (cab in operation) and fig. 6 (cab in transport) show a further advantageous particularity of an embodiment of the invention. For better identifiability, the top housing comprised by the top wall 9 is removed in fig. 5 and 6 so that the underlying elements can be seen. Fig. 5 and 6 show that the side wall 11 extends in the horizontal plane at an angle β (viewed in the adjustment direction B) obliquely to the middle longitudinal axis M (or its parallel line M') and thus obliquely from back to front (with reference to the working direction and the adjustment direction) towards the machine center M. The driver thus has an improved viewing angle in the operating direction a from the cab 7 onward. On the other hand, when the cab 7 is erected into the operating state, flush and sealed contact between the components of the cab that are adjacent to one another can be achieved very well, since then the individual elements are guided in a wedge-like manner, for example, to a defined form-fit connection in the end position.

Fig. 7 shows a compact configuration of the cab 7 and the surrounding console 5 in the operating state of the cab 7. It is important that the side walls 11 each have an access door 18 which, in the open state, allows access to the interior space of the cab 7, as shown in fig. 7. Fig. 7 furthermore shows that the adjustment recess 17 ends at an inclined wall 19 which widens in the working direction a outward toward the front section 30.

Furthermore, a form-locking device is present, which defines the end position of the individual elements of the cab 7 in the operating state. The form-locking means are stop regions here, for example between the side walls 11 and the front wall 8 and the rear wall 10. Furthermore, a corresponding locking device can be provided, by means of which the parts of the cab 7 which lie against one another in the operating state are locked to one another, in particular also clamped.

A control unit may also be provided which controls the adjustment of the cab between the transport state and the operating state and/or controls machine functions in conjunction with a machine control, for example the starting of motors and/or the driving and/or the work-making operation, etc., for example also for the area monitoring of the cab 7 and/or for reaching an end position of the cab in the operating state and/or the transport state as a function of sensor signals.

Fig. 8 finally shows the sequence of the method according to the invention for adjusting the cab 7 from the operating state to the transport state or vice versa. The transport state is denoted by reference numeral 20 and the operating state by reference numeral 21. In an adjustment step 22, it is provided that only a part of the cab is adjusted on the machine frame. In particular the cab floor should therefore not move relative to the machine frame, for example. Preferably, the parts of the cab (which are restricted here) are in particular the front and rear walls. The cab components, which are preferably displaced substantially parallel, are instead a top wall and side walls depending from the top wall, as described above.

For reasons of stability, it is preferred that the form-locking device form a form-lock in step 23 as the operating state 21 is reached. This simplifies the attainment of the operating state. In addition or alternatively, it can also be provided in step 23 that the fastening devices, for example latching devices and locking devices, are to be locked to one another in the operating state of the individual elements of the cab, in order to achieve an increased mechanical stability of the cab 7.

Claims

1. A self-propelled machine (1) comprising:

a drive motor (6);

a machine frame (2);

a travel device (3) connected to the machine frame (2); and

an operation panel (5) provided in a cab (7), the cab (7) including side walls (11), a top wall (9), a front wall (8), a rear wall (10), and a cab bottom (12); and is

The cab (7) can be adjusted between a lowered transport state and a raised operating state by means of an adjusting device (14),

it is characterized in that the preparation method is characterized in that,

at least the side walls (11), the top wall (9), the front wall (8) and the rear wall (10) can be moved relative to the machine frame (2) between a transport state and an operating state of the cab (7) by means of an adjustment device (14), which is designed in such a way that the relative position of at least the front wall (8) and/or the rear wall (10) relative to the top wall (9) and/or the side walls (11) changes when the cab (7) is adjusted between the transport state and the operating state, and

the adjusting device (14) is designed in such a way that the side walls (11) of the cab (7) are arranged upright in the transport state and in the operating state.

2. Self-propelled machine according to claim 1, characterised in that the cab (7) is a closed cab (7) in the working condition and is not closed in the transport condition.

3. Self-propelled machine according to claim 1 or 2, characterised in that the side walls (11) of the cab (7) have end positions displaced substantially parallel to each other.

4. Self-propelled machine (1) according to claim 1 or 2, characterized in that the front wall (8) and/or the rear wall (10) are hinged in a rotary articulation on the top wall (9).

5. Self-propelled machine (1) according to claim 1 or 2, characterized in that the side walls (11) are suspended from the top wall (9).

6. Self-propelled machine (1) according to claim 1 or 2, characterized in that at least one of the side walls (11) has an access door (18) and a frame (24).

7. Self-propelled machine (1) according to claim 1 or 2, characterized in that the adjustment device (14) is a deflection transmission.

8. Self-propelled machine (1) according to claim 1 or 2, characterized in that the adjustment means (14) comprise a four-hinge linkage comprising two links and a coupling piece, the top wall (9) constituting the coupling piece, the side walls (11) being respectively suspended on the coupling piece, and/or the links being constituted by the front wall (8) and/or the rear wall (10).

9. Self-propelled machine (1) according to claim 1 or 2, characterised in that the side wall (11) is inclined in relation to the machine centre in its longitudinal extension in a horizontal reference plane in the adjustment direction from the working position to the transport position.

10. Self-propelled machine (1) according to claim 1 or 2, characterized in that at least one adjustment recess (17) is present in the machine frame (2) for at least one of the side walls (11), into which adjustment recess the at least one side wall (11) is movable when adjusting between the transport state and the working state.

11. Self-propelled machine (1) according to claim 1 or 2, characterized in that there are a plurality of form-locking means which engage in each other form-lockingly when the cab (7) is in the operating state.

12. Self-propelled machine (1) according to claim 1 or 2, characterized in that there are a plurality of abutting seals which seal the gap between the parts of the cab (7) which are adjacent to each other in the operating state.

13. Self-propelled machine (1) according to claim 1 or 2, characterized in that locking means are present with which the side wall (11) can be fixed in the working condition and/or in the transport condition.

14. Self-propelled machine (1) according to claim 1 or 2, characterized in that there is at least one sensor with which the attainment of an operating state and/or a transport state of the cab (7) can be detected.

15. Self-propelled machine (1) according to claim 1 or 2, characterized in that there are guide means with which the adjustment movement of the side wall (11) between the transport condition and the working condition is guided.

16. The self-propelled machine (1) according to claim 1 or 2, characterized in that the self-propelled machine (1) is a ground milling machine, a road building machine or a harvester.

17. Self-propelled machine (1) according to claim 4, characterized in that the front wall (8) and/or the rear wall (10) are hinged in a rotary articulation on a frame element of the top wall (9).

18. Self-propelled machine (1) according to claim 5, characterized in that the side walls (11) are made in a substantially rigid whole with the top wall (9).

19. Self-propelled machine (1) according to claim 7, characterized in that the adjustment means (14) are in the form of an articulated linkage transmission.

20. Self-propelled machine (1) according to claim 11, characterized in that said form-locking means are located between the front wall (8) and the side walls (11) and/or between the rear wall (10) and the side walls (11) and/or between the cab bottom and the side walls (11).

21. Self-propelled machine (1) according to claim 12, characterized in that said gap is between the front wall (8) and the side walls (11) and/or between the rear wall (10) and the side walls (11) and/or between the cab bottom and the side walls (11).

22. Self-propelled machine (1) according to claim 14, characterized in that the reaching of the working condition and/or the transport condition of at least one of the side walls (11) can be detected by means of the sensor.

23. Self-propelled machine (1) according to claim 15, characterized in that with the guiding means the adjusting movement of the side wall (11) between the transport state and the working state is guided on the machine frame (2).

24. The self-propelled machine (1) according to claim 1 or 2, characterized in that the self-propelled machine (1) is a stabilizer, a finisher, a road milling machine or a terrace miner.

25. A method for adjusting a cab (7) between a lowered transport state and a raised working state, characterized in that between the transport state and the working state only a part of the cab (7) is adjusted relative to a machine frame (2) by means of an adjusting device (14) in such a way that the relative position of at least a front wall (8) and/or a rear wall (10) relative to a top wall (9) and/or side walls (11) changes when the cab (7) is adjusted between the transport state and the working state, and in that the adjusting device (14) is constructed in such a way that the side walls (11) of the cab (7) are arranged upright in the transport state and in the working state.

26. Method according to claim 25, characterized in that the side walls (11) of the cab (7) are displaced substantially parallel between the transport state and the operating state.

27. Method according to claim 25 or 26, characterized in that during the adjustment of the side walls (11), an adjustment of the rear wall (10) and/or the front wall (8) relative to the side walls (11) is also effected.

28. Method according to claim 25 or 26, characterized in that the side walls (11), the top wall (9), the front wall (8), the rear wall (10) and the cab bottom (12) remain connected to each other when the cab (7) is adjusted.

29. Method according to claim 25 or 26, characterized in that the side walls (11) are deflected into a form-locking connection with the rear wall (10) and/or the front wall (8) when the operating state is reached.

30. Method according to claim 26, characterized in that the side walls (11) of the cab (7) are displaced essentially in parallel between the transport state and the operating state via the adjusting gear.