EP3231973A1 - Working machine with cabin - Google Patents

Abstract

The present invention relates to a work machine, in particular a wheel loader, with at least one cabin which has at least one car door (20) which is pivotably arranged on the car frame by means of at least one hinge arrangement (30, 40), the hinge arrangement (30, 40). at least one frame part which is arranged on the cabin frame and has at least one door part rotatable relative to the frame part, which is arranged on the car door (20), at least two hinge arrangements (30, 40) being provided in the height direction of the car door (20 ) are spaced apart from each other and their frame parts are interconnected by at least one rod (50) which fixes the distance of the frame parts from each other and their orientation to each other.

Description

The present invention relates to a work machine, in particular a wheel loader, having at least one cabin, which has at least one car door, which is pivotally mounted on the cabin frame by means of at least one hinge arrangement, wherein the hinge arrangement at least one frame part, which is arranged on the cabin frame and at least one relatively to the frame part rotatable door part, which is arranged on the car door has.

From the state of the art, working machines, such as, for example, wheel loaders, are known, which have a spring-mounted driver's cab. This cab is usually made in a cuboid shape and indeed from a combination of tubular frame structures and surface elements, in particular metal sheets. This construction gives the driver the security in case of danger and besides allows a maximum field of view for detection of the machine environment by means of transparent discs.

The door is pivotally mounted on the cabin by means of at least one hinge assembly. Such an embodiment is for example from the DE 10 2014 015 711.3 known.

When using a plurality of superimposed hinge assemblies, there is the problem that it is sometimes difficult to align the hinges to each other so that they on the one hand have the desired distance from each other and on the other lie on a line or exactly aligned with each other, so that no tensions occur.

The present invention is therefore based on the object to further develop a working machine of the type mentioned in that their hinge assembly can be mounted in a simple manner reliably and in the desired position.

This object is achieved by a work machine with the features of claim 1. Thereafter, it is provided that at least two hinge arrangements are provided, which are spaced apart in the height direction of the car door and the frame parts are connected by at least one rod which fixes the distance of the frame parts from each other and their orientation to each other. The at least one rod, which is preferably designed as a metal rod, thus ensures that the frame parts of the hinges, ie the stationary hinge elements which are fixed to the cabin are arranged in the desired manner relative to each other. In practice, it has been found that it is difficult or impossible to align the hinge assemblies by gauges or the like so that a smooth opening and closing mechanism can be performed and attachment to the cabin is properly carried out. As part of the assembly, it may happen that the hinge assemblies become tense or stiff and thus have only a comparatively short life.

By the use of the rod according to the invention, which connects the stationary parts of the hinge assemblies firmly together, it is ensured that the hinges are arranged in the correct position and arrangement relative to each other.

The use of gauges or other additional aids can be dispensed with. The rod ensures that the hinges open and close smoothly and that distortion of the hinge assemblies relative to each other is eliminated.

Preferably, the hinge assemblies each have frame portions that extend in the same direction as the rod, i. the frame members, such as inboard hinge members, are aligned in a preferred embodiment with said rod extending between the two (or more than two) hinge assemblies.

In a preferred embodiment of the invention, at least one of the hinge assemblies is a lifting hinge. This is understood to mean that this causes a stroke movement of the door part relative to the frame part during an opening movement of the car door. By such a hinge, the door is raised altogether, which brings with it the advantage that it does not interfere with the pivoting movement or in the open state with components, such as a rise, etc. of the machine.

Furthermore, it can be provided that a further hinge arrangement is a simple rotary hinge and has no lifting functions. A hinge is here understood to mean a hinge in which a first part rotates about a second part when the car door is opened, without this causing a lifting movement of one hinge part relative to the other hinge part.

In a preferred embodiment of the invention, at least one first hinge arrangement is arranged above the at least one second hinge arrangement, wherein the upper hinge assembly is said lift hinge and the second hinge assembly is said simple rotary hinge.

Instead of a single rotary hinge basically several hinges can be used. In principle, a plurality of lifting hinges can be used, however, a preferred embodiment of the invention is that only exactly one lifting hinge is used per door.

Preferably, the rod is a metal rod and preferably a steel rod, wherein it is preferably provided that the rod is designed as a whole or at least partially. The rod has the task of fixing the fixed elements, i. the frame parts of the two or more hinge assemblies always keep in the desired position relative to each other, which requires a correspondingly stable configuration of the rod.

The frame part of the hinge may have at least one inner part surrounded by at least one outer part of the door part, said rod preferably having a diameter which is in the range of +/- 20% of the diameter of the inner hinge part. The invention thus also encompasses the part in which the rod has a diameter which substantially or exactly corresponds to the diameter of the inner part of the frame part of the hinge.

Under "frame part" is any fixed part of the hinge assembly to understand and "door" each movable with the door part of the hinge assembly.

In a further embodiment of the invention it is provided that the rod is connected by a non-positive and / or by a positive connection with the frame parts of the at least two hinge assemblies.

In a further embodiment of the invention, the lifting hinge has at least one inner part, with which said rod is connected and at least one outer part, which is rotatable relative to the inner part, wherein the inner part is provided with one or more bolts, the run in one or more grooves of the outer part or vice versa. By this arrangement it is achieved that a rotational movement of the inner part relative to the outer part leads to a vertical or lifting movement. In this case, for example, the inner part may have one or more bolts running in grooves of the outer part or, conversely, the outer part one or more bolts running in one or more grooves of the inner part.

The term "bolt" is to be understood generally and includes any projection, such as a ball, roller, etc., which runs in a groove or the like.

The rod can also advantageously be made in two parts or consist of more than two parts, with different parts in material and / or material class differ. The advantage of this arrangement is that the respective lower hinge manages without further coverage. Preferably, this is achieved in that the first part of the rod is cost-effective a metal rod, preferably a steel rod and a second part is guided by the lower hinge, a stainless rod, preferably used in stainless steel execution.

The connection of the two parts can be done either via an additional intermediate part, which is connected by way of example with two parts non-positively, or it is the first part and the second part of the rod overlapping manufactured so that the outer diameter of the two rod parts are about the same size, however the inner diameters of both parts differ noticeably. The different inner diameters of the two parts result from force entries in the region of the sleeve, which are removed via the frame fitting part.

The second part is preferably not a full part, since this requires a higher weight, a machining in the region of the screw connection with the frame fitting part and thereby makes the entire rod more expensive.

Instead of using metal, any other suitable material may also be considered for the rod, e.g. GfK.

It is also conceivable that the lifting hinge has at least one inner part with which the rod is connected and that the inner part also has at least one cavity in which a damper is arranged. This damper has the task of the door movement, at least in the end region, i. To dampen in the almost open and almost closed state and this has the advantage that the door does not hit or only muted.

The lifting hinge may have at least one cover, which is arranged, so that the inner part is at least partially shielded from the environment when the door part is raised. This cover may e.g. be designed as a cup or pot or as a bellows. Preferably, the cover is firmly fixed only in one end, and freely rotatable at the other end to avoid torsional stresses.

Further details and advantages of the invention will be explained in more detail with reference to an embodiment shown in the drawing.

Figur 1:

eine Seitenansicht auf die Kabine mit Kabinentür

Figur 2:

eine erste perspektivische Schnittansicht durch die obere Scharnieranordnung,

Figur 3:

eine zweite perspektivische Schnittansicht durch die obere Scharnieranordnung,

Figur 4:

eine Schnittansicht durch den unteren Abschnitt der oberen Scharnieranordnung,

Figur 5:

eine Schnittansicht durch die untere Scharnieranordnung,

Figur 6:

eine Schnittansicht durch die gesamte Einrichtung einschließlich oberer und unterer Scharnieranordnung und Stange.

Show it:

FIG. 1:

a side view of the cabin with cabin door

FIG. 2:

a first perspective sectional view through the upper hinge assembly,

FIG. 3:

a second perspective sectional view through the upper hinge assembly,

FIG. 4:

a sectional view through the lower portion of the upper hinge assembly,

FIG. 5:

a sectional view through the lower hinge assembly,

FIG. 6:

a sectional view through the entire device including upper and lower hinge assembly and rod.

FIG. 1 shows by the reference numeral 10, the cab of a working machine, in particular a wheel loader. At the car 10, a door 20 is struck, which allows access to the cabin interior in the open state and closes the cab 10 in the closed state.

Reference numeral 30 denotes an upper hinge assembly and reference numeral 40 a lower hinge assembly. The door 20 is pivotally attached to the cab 10 by means of both hinge assemblies 30, 40.

The upper hinge assembly 30 is designed as a lifting hinge, which should be understood that a rotational movement of the door is coupled from the closed to the open position with a lifting of the door.

The lower hinge assembly 40 is not arranged as a lifting hinge, but essentially comprises a door part which is arranged on the door and which surrounds with a sleeve-shaped portion a rod which is fixed to the car.

Like this FIG. 1 is further apparent, the two hinge assemblies are connected by a rod 50 with each other, which in turn each with a fixed part, ie not connected to the door moving part of the hinge assemblies, eg non-positively and / or positively and / or materially connected.

FIG. 2 shows the upper hinge assembly 30 in a sectional view.

The upper hinge assembly 30 includes an outer member A which is fixedly connected to a door fitting 32 and which is rotated with the door.

Within the outer part A are the slide member 60 and in a cavity formed by this damper 70, which prevents the door strikes unrestrained when reaching their end positions.

The link member 60 may be provided with one or more projections which run in inclined grooves of the outer part A, so that the results in a relative movement between the link member 60 and the outer part of a vertical movement of the door. The reverse embodiment (projections on the outer part and grooves on the cam member) is included in the invention.

The reference numeral 31 denotes the frame fitting part, with which the upper hinge assembly is fixedly fixed to the car. With this frame fitting part, the rod or an intermediate part 51 arranged in the end region of the rod is non-rotatable and preferably non-positively and / or positively connected. The intermediate part 51 is pressed into the upper end region of the tubular rod 50. Likewise, the intermediate part 51 is pressed with the sliding member 60. As can be seen from the figure, the intermediate part 51 extends from below into a cavity of the sliding part 60.

This results in that the slide member, the frame fitting part, the intermediate part and the rod 50 are rotatably mounted on the car.

FIG. 3 shows the upper hinge assembly in a different perspective and illustrates in particular the angular design of the frame fitting part 31st

FIG. 4 shows a sectional view through the lower portion of the upper hinge assembly 30. It is clear that in addition to the said compression between the intermediate part 51 and the link member 60, a positive connection is achieved by a bolt 80. This penetrates the intermediate part 51 and the slide member 60 and thus also ensures a rotationally fixed connection between the two parts.

Out FIG. 4 also results that the intermediate part is dimensioned on one side so that it can be accommodated in the end region of the rod 50 and dimensioned on the other side so that it can be accommodated in the cavity of the slide 60.

Out FIG. 5 a sectional view through the lower hinge assembly 40 can be seen.

This comprises a frame fitting part 41, with the rotatably a pipe 90 is in communication, which may be designed as a stainless steel pipe. Partially or completely around this tube 90 extends the clamp or sleeve 100, which is fixedly connected to the door fitting part of the lower hinge assembly 40. Like this FIG. 5 further, the tube is made in its upper end with a smaller diameter, so that it can be received in the rod 50 and pressed with this. The ratio of outer diameter to inner diameter is preferably less with respect to the rod 50 than with the tube 90, which has a comparatively small inner bore and a relatively large material thickness.

For the sake of completeness, it is mentioned that guide sleeves and sealing rings can be fitted between the sleeve and the clamp, and meanwhile lubricant supply means (all not shown) can be attached.

FIG. 6 shows finally the entire arrangement of upper and lower hinge assembly and the rod 50, which is connected between each fixed, that is not moving with the door parts of the hinge assemblies, for example by traction or positive engagement or otherwise.

In a preferred embodiment, the entire in FIG. 6 shown arrangement first fixed to the door by means of the door fitting parts and then screwed together on the cabin, riveted, etc.

Claims (13)

Working machine, in particular wheel loader, having at least one cabin which has at least one car door, which is arranged pivotably on the cabin frame by means of at least one hinge arrangement, wherein the hinge arrangement comprises at least one frame part which is arranged on the cabin frame and at least one door part rotatable relative to the frame part, which is arranged on the car door, characterized in that at least two hinge arrangements are provided, which are spaced apart in the height direction of the car door and whose frame parts are interconnected by at least one rod which fixes the distance of the frame parts from each other and their orientation to each other. Work machine according to claim 1, characterized in that one of the hinge assemblies is a lifting hinge that causes an opening movement of the car door, a lifting movement of the door part relative to the frame part. Work machine according to claim 1 or 2, characterized in that one of the hinge assemblies is a simple rotary hinge and not a lifting hinge. Work machine according to claim 2 and 3, characterized in that at least one first hinge arrangement is arranged above at least one second hinge arrangement, and that the first hinge arrangement is the lifting hinge and the second hinge arrangement is the simple rotary hinge. Work machine according to one of the preceding claims, characterized in that it is the rod is a metal rod and preferably a steel rod, wherein it is preferably provided that the rod is designed to be hollow overall or at least in their ends. Work machine according to one of the preceding claims, characterized in that the rod is made in two parts or more than two parts, wherein the plurality of parts differ in material and / or material class. Work machine according to claim 6, characterized in that the first part of the rod is a metal rod, preferably a steel rod and a second part is a stainless rod, preferably used in stainless steel execution. Work machine according to claim 7, characterized in that overlap the first part and the second part of the rod, wherein the outer diameter of the two rod parts are approximately equal in size, however, the inner diameter of both parts differ. Work machine according to one of the preceding claims, characterized in that the frame part of the hinge has at least one inner part which is surrounded by at least an outer part of the door part and in that the rod has a diameter in the range of ± 20% of the diameter of the inner hinge part lies. Work machine according to one of the preceding claims, characterized in that the rod is connected by a non-positive and / or by a positive connection with the frame parts. Work machine according to one of claims 2 to 10, characterized in that the lifting hinge has at least one inner part, with which the rod is connected, and at least one outer part, which is rotatable relative to the inner part, wherein the inner part with a or more bolts running in one or more grooves of the outer part or vice versa. Work machine according to one of claims 2 to 11, characterized in that the lifting hinge has at least one inner part, with which the rod is connected and that the inner part also has a cavity in which a damper is arranged. Work machine according to one of claims 2 to 12, characterized in that the lifting hinge has at least one cover which is arranged to shield the inner part at least partially when the door is raised from the environment, wherein it is preferably provided that the cover cup-shaped or formed as a bellows is.

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