DE202016101740U1 - Work vehicle with protection - Google Patents

Abstract

A work vehicle, comprising - a drive unit (1) having a drive; - A tray unit (2) having a trough (6) for receiving a load; - A between the driving unit (1) and the tray unit (2) arranged joint (4) for coupling the driving unit (1) with the tray unit (2) such that the driving unit (1) and the tray unit (2) about at least one vertical axis (Z) of the work vehicle are movable relative to each other; wherein - on or on the trough unit (2) a protective device (13) for protecting a on the driving unit (1) located driver's workplace is arranged.

Description

The invention relates to a work vehicle, in particular a loader such as a dumper or a wheel loader.

Such work vehicles are known. Special-type wheel loaders of this type may include a front end and a rear end, and a joint disposed between the front end and the rear end for coupling the rear end to the front end, such that the front end and rear end are movable relative to each other about at least one vertical axis of the work vehicle are. Thus, since the front and the rear can relative to each other make a kind of "kinking", in this context is also spoken of articulated wheel loaders. The kinking between the front end and the rear end enables a steering movement and thus cornering, since the front and rear wheels arranged wheels or axles can be made at an angle to each other.

Accordingly, so-called dumpers (articulated smaller dump truck) are known in which a drive unit (rear carriage) with a trough unit (front end) are coupled via an articulated joint to allow a bending movement and thus a steering.

To improve the off-road capability, it is also known to form the joint such that it also allows a relative movement between the front end and the rear end or driving unit and trough unit about the longitudinal axis of the working vehicle. This relative movement is also referred to as "commuting". Accordingly, such a combined joint is also called a "kink-pendulum joint". A kink-pendulum joint is for example from the DE 101 30 530 C1 or the EP 2 218 835 A1 known. The structure of a kink-pendulum joint is particularly in the EP 2 218 835 A1 Described in detail, so that at this point a description in detail is unnecessary.

In dumpers, a trough pivotable upwardly relative to the chassis of the trough unit is provided on the trough unit, e.g. for picking up loose bulk materials, stones, earth, rubble, etc.

The driver can sit away with the view of the trough unit and drive the dumper, or sit while driving overlooking the trough device. In both cases, it is important to protect the driver from objects falling from the trough, such as loose bulk materials, rocks, earth and the like. Furthermore, it is important to protect the cab or the driver's workstation from the material to be loaded and also, for example, from an excavator arm when the trough is being loaded.

To protect the driver and the driver's workplace, it is known to provide a protective grid on a driver's cab.

The invention has for its object to provide a work vehicle, which ensures easy to be provided protection of the driver's workplace in front of the trough falling objects.

The object is achieved by a work vehicle with the features of claim 1. Advantageous embodiments of the invention are specified in the dependent claims.

The invention relates to a work vehicle comprising a drive unit having a drive, a tray unit having a tray for receiving a load, and a joint arranged between the drive unit and the tray unit for coupling the drive unit to the tray unit such that the drive unit and the tray unit is movable relative to each other about at least one vertical axis of the work vehicle. On or on the trough unit a protective device for protecting a driver movable on the driving unit is arranged.

By providing the protective device on the side of the trough unit instead of approximately on the driving unit, there are greater possibilities of variation with regard to the design of the driving unit on the one hand and the protective device on the other hand.

The protective device may be mounted on the top of the trough on the trough itself. This ensures that the load located on the trough can not fall from the trough at all, but is caught by the protective device.

The protective device can in this case be formed integrally with the trough or together with it, for example, together. be welded with this. This ensures increased stability. On the other hand, it may also be attached to the trough in such a way that it can be removed as a whole from the trough. In this case, there are greater possibilities of variation depending on the load to be transported, and maintenance is facilitated.

The protective device may have an upper part and a lower part, wherein the lower part is attached to the trough unit and the upper part can be folded over with respect to the lower part, especially fold down. In this way, when driving the dumper, in which the driver looks to the trough, or when unloading under view of the trough for a protection provided by the lower part, but nevertheless a clear view can be ensured.

Preferably, it is provided that the upper part is folded away in the direction away from the driver, so that dangerous situations can not occur when folding over even for the driver.

The two-piece protective device can be designed so that at least one bolt holds the upper part of the protective device in the folded-up state (for example, one bolt on each side) and the upper part of the protective device can be folded down after pulling out the at least one bolt and through Pushing the at least one bolt in the folded state is retained.

As an alternative to bipartite, the protective device can also be one-piece, which ensures high stability. For practical reasons, the protective device can be folded down as a whole folded down on the trough and for the protection of the driver also here preferably in the direction of the driver to be folded away. The folding over can take place, for example, during an empty journey in order to ensure better visibility.

Preferably, the protective device is designed as a protective grid. A protective grid can provide sufficient protection against cargo of a certain minimum size and at the same time allow a view through the driver.

Preferably, it is provided in this case that the protective grid has struts which extend from bottom to top and are spaced by a distance of between 5 cm and 20 cm, preferably between 10 cm and 15 cm, wherein also preferably the distances between adjacent struts at least a part of the protective grid are even.

Alternatively, to form a grid, the protective device may be a plate, for example made of transparent hard plastic, Plexiglas ^® or polymer.

The protective device may follow the course of the trough, in particular of the trough edge on the driver-facing side of the trough, over a straight-line section of the trough edge in at least one further section, e.g. a further rectilinear portion buckling away from the rectilinear portion. In this way, also for a protection of the driver when ascending the driver's seat is taken care of laterally falling from the trough load.

A driver protection structure, in particular a driver's cab, may be provided on the driving unit, within which a driver's seat is arranged, which is preferably rotatable.

The driver protection structure can fulfill the usual safety features, such as, in particular, FOPS protection (fall-over protection system) and ROPS protection (roll-over protection system). For this purpose, in the context of the driver protection structure, a correspondingly stable structure, such as a bracket may be provided. The protective effect should always be given regardless of the position of the rotatable driver's seat and possibly a rotatable console for the driver.

Instead of a driver's cab, a simple rollover protection bar can also be formed on the driving unit.

The joint disposed between the driving unit and the tray unit is capable of allowing relative movement about the vertical axis (kinking) to generate a steering movement. The pivotal position between the driving unit and the trough unit can be imposed by a steering device acting between the driving unit and the trough unit. With the help of the steering device, a cornering of the work vehicle can be realized.

In addition, the joint may also be configured to allow relative movement about the longitudinal axis, also referred to as "hunting". The relative movement both about the longitudinal axis and about the vertical axis is accordingly each a kind of pivoting movement. The joint may, in addition to the movement about the vertical axis also allow a pivoting movement about a longitudinal axis of the working vehicle, in particular a kink-pendulum joint.

For example, For example, the articulated pendulum joint may comprise a lower ball joint connecting the trough unit to the driving unit and an upper ball joint arranged above the lower ball joint and connecting the trough unit to the driving unit. A first component of the upper ball joint may be fixedly connected to the tray unit while a second component of the upper ball joint may be connected to the drive unit via a linkage movable relative to the drive unit. The linkage may be pivotable relative to the drive unit.

The trough can be pivoted about a pivot axis, ie be liftable, wherein the Pivoting axis is arranged to one side of a wheel axle and the trough extends from one side of the wheel axle to the other side of the wheel axle. In this embodiment, the trough is mounted over one of the wheel axles so that the load carried by the trough is received substantially from the axle. The pivot axis allows tipping of the trough contents, which is why the pivot axis in front of the wheel axle, for example, is parallel offset to the wheel axle. The trough extends in the longitudinal direction of the vehicle over the wheel axle from the side on which the pivot axis lies, beyond the wheel axle, to the other side of the wheel axle.

These and other advantages and features of the invention are explained in more detail below by means of examples with the aid of the accompanying figures. Show it:

1 in side view, a working vehicle with a rotatable driver's seat in the forward position;

2 the work vehicle with driver's seat in reverse position;

3 a perspective view from the vehicle rear side on the trough of the working vehicle in a raised position of the protective grid;

4 the perspective view according to 3 in a Umklappstellung of the protective grid;

5 a top perspective view of another work vehicle with a protective grid in the raised position;

6 a perspective top view of the work vehicle in the Umklappstellung;

7 one compared to the 1 and 2 opposite side view of a work vehicle;

8th a plan view of the work vehicle in the raised position according to 5 ; and

9 a plan view of the work vehicle in the Umklappstellung according to 6 ,

1 shows in side view serving as a work vehicle so-called dumpers. As dumpers, for example, smaller kink-steered dump trucks are called.

The vehicle has a drive unit 1 and a trough unit 2 on, each one a rigid wheel axle 3 wear with wheels. Between the driving unit 1 and the trough unit 2 is a so-called kink-pendulum joint 4 arranged. Such a kink-pendulum joint 4 has already been described above and serves to couple the driving unit 1 with the trough unit 2 such that the driving unit 1 and the trough unit 2 Both about a vertical axis Z and about a longitudinal axis X relative to each other are movable or pivotable.

The pivoting about the vertical axis Z allows a steering movement in that the two wheel axles 3 can be placed at an angle to each other (so-called kink movement).

The mobility about the longitudinal axis X is also referred to as "commuting" and increases the off-road capability of the work vehicle considerably.

The pivoting movement about the vertical axis Z is effected by a steering device which is a hydraulic piston-cylinder unit 5 includes. Using the piston-cylinder unit 5 can the angular position between the driving unit 1 and the trough unit 2 be set.

The trough unit 2 carries a hollow 6 at its top. The hollow 6 is by a non-illustrated hydraulic lifting mechanism about a pivot axis 7 pivotable or liftable. This allows the, for example, loose bulk material carrying trough 6 over a loading sill 8th simply be emptied. In addition, the trough can 6 on the trough unit 2 also be mounted rotatably about a vertical axis.

On the drive unit 1 is a driver protection construction 9 built, among other things, a driver's seat 10 and various controls (steering wheel, joystick, gas and brake pedals) encloses. The driver protection construction 9 is formed among other things by brackets, which provide a rollover protection, whereby a ROPS / FOPS structure is realized.

The driver's seat 10 is on a rotary console 11 attached, which also carries the other controls. The rotary console 11 is about a plain bearing 12 relative to the remaining driving unit 1 rotatably mounted. Alternative to the plain bearing 12 can the rotary console 11 be stored by means of a ball bearing or by using smaller rollers.

In particular, the rotary console 11 pivoted by 180 ° between a forward position and a reverse position, like the 1 and 2 demonstrate.

The 1 shows the rotary console with the driver's seat 10 in forward position. A driver in the driver's seat 10 sitting, looking forward in the direction of travel, away from the hollow 6 ,

2 shows the same work vehicle, but with a rotational position of the rotary console 11 and thus the driver's seat 10 in reverse position. Here one looks in the driver's seat 10 sitting driver in reverse position, towards the trough 6 ,

As the 1 and 2 show, not just the driver's seat 10 pivots, but the entire driver's cab with all controls.

On the hollow 6 is to the driver protection construction 9 pointing side towards a two-piece protective grid 13 intended. This is in the 3 and 4 shown enlarged.

3 shows an unfolded or folded-up position, which also in the 1 and 2 is shown. The protective grid 13 includes a lower grid part 14 and an upper grid part 15 , The lower part of the lattice 14 consists of a middle lower grid part 16 and on the left and right respectively subsequent wing parts 17 and 18 that substantially follow the contour of the bowl rim: as seen from the top view 8th apparent, kinks from a straight-line section 26 the Muldenrandes another straight section 27 to the left at an angle of about 45 °, and another straight-line section 28 to the right at an angle of about 45 ° from. The two wing parts 17 and 18 of the lower part of the lattice 14 sit, look like 3 seen on these margins 27 and 28 on.

The upper part of the lattice 15 has two arms with openings by a pivot pin 19 or a pivot pin 20 are penetrated, with the pivot pin 19 respectively. 20 at the same time a respective arm at the middle lower grid part 16 penetrate. At the same time corresponding holes or holes in the upper grid part 15 and the middle lower grid part 16 from retaining bolts 21 and 22 penetrated the upper part of the lattice 15 in the in 3 hold the raised position shown.

By pulling out the retaining bolts 21 and 22 is it possible to use the upper part of the lattice 15 towards the driver protection construction 9 to swing away. In the lower position are the retaining bolts 21 and 22 back into corresponding holes or holes 23 and 24 into it, so that the in 4 shown Einklappstellung is made.

According to the 3 and 4 is the upper part of the grid 15 each with an arm to the left of the corresponding arm of the middle lower lattice part 16 held. In a modification thereof, the upper grid part 15 also be fastened on the right side or with his arms the corresponding arms of the middle lower lattice part 16 either enclose outside or fit inside to ensure symmetrical training.

The aspiration 25 of the lower part of the lattice 14 have in the middle lower part of the lattice 16 a uniform distance d, the distance d of the struts 29 in the upper part of the lattice 15 equivalent. The aspiration 25 . 29 run from bottom to top. In the wing parts 17 and 18 of the lower part of the lattice 14 the struts are spaced a little further apart.

5 shows a perspective view of the entire work vehicle 1 , From this view it can be seen that both the lower grid part 14 as well as the upper grid part 15 one in the driver's safety assembly 9 be able to protect the driver from loading. The lateral wing parts 17 and 18 of the lower part of the lattice 14 protect one over kicks 30 the worker boarding the driver before laterally falling load.

The 6 shows the perspective view according to 5 in the position of the protective grille according to 4 , It can be seen that in the driver protection structure 9 driver also by the folded down guard 13 protect against cargo and nevertheless sufficiently good insight into the trough 6 may have.

7 shows this in the side view, the 8th and 9 show corresponding plan views of the situation according to 3 and 4 ,

From the 8th and 9 it can be seen that the protective grid 13 is placed substantially vertically upwards, so that the corresponding struts 25 and 29 run exactly vertically upwards. In a modification thereof, the protective grid 13 also be slightly inclined to the side, for example, follow a slope of the trough wall on the side to the driver. Conversely, it could also be overhanging the trough 6 be formed over.

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 10130530 C1 [0004]
• EP 2218835 A1 [0004, 0004]

Claims (18)

Work vehicle, with - a driving unit ( 1 ) having a drive; - a trough unit ( 2 ), which is a hollow ( 6 ) for receiving a load; - one between the driving unit ( 1 ) and the trough unit ( 2 ) arranged joint ( 4 ) for coupling the driving unit ( 1 ) with the trough unit ( 2 ) such that the driving unit ( 1 ) and the trough unit ( 2 ) are movable relative to each other about at least one vertical axis (Z) of the working vehicle; wherein - on or on the trough unit ( 2 ) a protective device ( 13 ) for protecting a person on the driving unit ( 1 ) located driver workstation is arranged. Work vehicle according to claim 1, wherein the protective device ( 13 ) on top of the trough ( 6 ) at the trough ( 6 ) is attached. A work vehicle according to claim 2, wherein said guard is integral with said trough. A work vehicle according to claim 2 or 3, wherein the guard is attached to the trough so as to be detachable as a whole from the trough. Work vehicle according to one of the preceding claims, wherein the protective device ( 13 ) a lower part ( 14 ) and an upper part ( 15 ), the lower part ( 14 ) at the trough unit ( 2 ) and the upper part ( 15 ) opposite the lower part ( 14 ) is foldable. Work vehicle according to claim 5, wherein the upper part ( 15 ) in the direction of the driving unit ( 1 ) is folded away. Work vehicle according to claim 5 or 6, wherein at least one bolt ( 21 . 22 ) the upper part of the protective device ( 15 ) holds in the unfolded state and the upper part ( 15 ) after pulling out the bolt ( 21 . 22 ) is folded down and by pushing the bolt ( 21 . 22 ) is retained in the folded state. Work vehicle according to one of claims 1 to 4, wherein the protective device is in one piece. Work vehicle according to claim 8, wherein the protective device is fastened folded down as a whole down. Work vehicle according to claim 8 or 9, wherein the protective device is in the direction of the driving unit ( 1 ) is folded away. Work vehicle according to one of the preceding claims, characterized in that the protective device as a protective grid ( 13 ) is executed. Work vehicle according to claim 11, wherein the protective grille ( 13 ) Aspiration ( 25 . 29 ) which extend from the bottom to the top and are spaced by a distance, wherein preferably at least in one section ( 15 . 16 ) of the protective grid ( 13 ) all distances between adjacent struts ( 25 . 29 ) are even. Work vehicle according to one of the preceding claims, wherein the protective device ( 13 ) the course of a at the top of the trough ( 6 ) extending trough edge over a rectilinear section ( 26 ) in at least one other section ( 27 . 28 ) follows. Work vehicle according to one of the preceding claims, with one on the driving unit ( 1 ) provided driver's cab ( 9 ). Work vehicle according to one of the preceding claims, with one on the driving unit ( 1 ) provided roll bar. Work vehicle according to one of the preceding claims, wherein the joint ( 4 ) in addition to the movement about the vertical axis (Z) also allows a pivoting movement about a longitudinal axis (X) of the working vehicle. Work vehicle according to one of the preceding claims, wherein - the joint ( 4 ) is a kink-pendulum joint; - the articulated pendulum joint a the trough unit ( 2 ) with the driving unit ( 1 ) connecting the lower ball joint and a above the lower ball joint arranged, the trough unit ( 2 ) with the driving unit ( 1 ) has connecting upper ball joint; A first component of the upper ball joint with the trough unit ( 2 ) is fixedly connected; and wherein - a second component of the upper ball joint via a relative to the driving unit ( 1 ) movable linkage with the driving unit ( 1 ) connected is. Work vehicle according to one of the preceding claims, wherein the trough ( 6 ) about a pivot axis ( 7 ) is pivotable and the pivot axis ( 7 ) to one side of a wheel axle ( 3 ) and the trough ( 6 ) from one side of the wheel axle to the other side of the wheel axle ( 3 ).

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