EP0992630A2 - Work vehicle with levelling blade support - Google Patents

Abstract

The scraper blade is adjusted for normal operation by two hydraulic rams (4,5) and by a parallel support linkage. One of the support elements comprises a flat plate (2) which is split by a line (14) parallel to one end, into two sections linked by a pivot (11) to allow relative settings between the two sections. This effectively tilts the scraper blade in either direction.

Description

The present invention relates to a work vehicle with one thereon attached attachment, especially a dozer blade, which by two hydraulic cylinders and a parallel guide can be raised and lowered.

Mobile, especially pneumatic tires, construction machinery, which are able to driving public roads at a relatively high speed, but also are able to make the necessary change of location in the area usually for the working position with claw support and / or Support dozer blade.

In the usual mobile construction machinery, mainly for earthworks used, it is not so important whether the terrain is absolute is horizontal or has slight inclinations. Therefore at least one dozer blade attached on one side, for example on the rear of the vehicle Stabilization of the work function completely sufficient.

If with the work vehicle, however, both usual earthworks as well Crane functions are to be performed, it is especially for the execution of the Crane function required that the machine be aligned substantially horizontally comes to a standstill. This is, for example, thanks to a fourfold claw support of a work vehicle known. However, it should be attached to a vehicle Dozer not to be dispensed with, as well as dozing and crane functions to be able to perform.

In the case of uneven or sloping terrain, it is necessary that supporting work vehicle should be aligned horizontally at four points if possible can, which is why the position of the respective supports from the horizontal aligned work vehicle to the sloping terrain different must be adjustable in height.

The support dozer blade must therefore both have the possibility of being plane-parallel Have down and up, but also a one-sided up or down movement of the Outriggers to level out sloping terrain. With conventional Work vehicles with a dozer blade there is a risk that at an inclination of the support dozer blade by different or individually controllable hydraulic cylinder the kinematics of the parallel guide is damaged.

It is therefore an object of the invention to provide a work vehicle with a To create a dozer blade, which is used for stabilization for a crane function sloping terrain can be used. It is also an object of the invention that the work vehicle with the support dozer blade for both leveling work and can be used for a crane function in sloping terrain.

The object is achieved by a device with the characterizing features of claim 1 solved. An essential to the invention Advantage can be seen in the fact that due to the division of a carrier, which together with another handlebar forms the parallel guidance of the dozer blade, one Inclination of the dozer blade around the vehicle's longitudinal axis is possible, the Kinematics of parallel guidance due to the limitation of the relative movement of the Edges of the elements of the split beam is not damaged.

With a training according to claim 2, the inclination of Support dozer blades with an adjustable clearance between the locking element and at least one element of the divided carrier is limited to a defined area become. This ensures that the support dozer blade is within a predetermined range can be inclined, the kinematics of the Dozer blade is not stressed to damage it.

Furthermore, a development according to claim 3 enables that Support dozer blade for both conventional earthworks, in particular Leveling work, as well as support for crane functions in sloping terrain can be used.

By training according to claim 4 can on the work vehicle due to the divided carrier, which in this case is not due to the locking element is connected to each other, different divided attachments, For example, two claw supports are attached. So only a small one Conversion necessary, for example to support the To allow work vehicle, which also large bumps in the terrain can compensate.

With a development according to claim 5 is a by the locking element Connection of the divided, preferably torsionally rigid, carrier enables, so that a simple and defined connection between the locking element and the shared one Carrier is manufactured.

A further development according to claim 6 is achieved by inserting a Intermediate element between the locking element and the divided carrier one Interchangeable and firm connection ensured to the support dozer blade To be able to use grading work.

In another embodiment of the locking element as a bolt according to claim 7, can limit the inclination of the support dozer blade by one conventional form element can be guaranteed, which with an opening, in particular a bore with a larger inner diameter is engaged.

A development according to claim 8 is particularly advantageous because of the Displacement of the bolt on the one hand a rigid connection of the divided carrier and on the other hand, a connection of the divided carrier limited by a game can be made, or the elements of the split beam due to the position of the bolt do not communicate. Thus, the bolt only needs to be mechanical or by means of a medium, for example via a hydraulic or pneumatic system, into this three different positions are moved so that the work vehicle can be used for grading and crane functions at the same time. For the The work dozer blade can be used as a crane on the one hand serve to support the vehicle against an inclined plane, and on the other hand claw supports can be attached to the divided support elements, to support the vehicle against a significantly different terrain.

Further details, features and advantages of the invention result from the following description of embodiments of the invention with reference to Drawings.

Fig. 1 eine schematische Ansicht eines Abstützplanierschilds gemäß der Erfindung, welche von einem Arbeitsfahrzeug zugewandt ist;

Fig. 2 eine Seitenansicht eines Abstützplanierschilds ohne Sperrelement in abgesenktem Zustand;

Fig. 3 eine Seitenansicht des Abstützplanierschilds in angehobenem Zustand gemäß der Erfindung;

Fig. 4 eine Draufsicht des Abstützplanierschilds gemäß der Erfindung;

Fig. 5 eine schematische Vorderansicht des Unterwagenrahmens mit dem daran angebrachten geteilten Träger gemäß der Erfindung; und

Fig. 6 eine Draufsicht einer weiteren Ausführungsform des Abstützplanierschilds mit einem geteilten Träger gemäß der Erfindung.

It shows:

Figure 1 is a schematic view of a support dozer blade according to the invention, which faces a work vehicle.

2 shows a side view of a support dozer blade without a locking element in the lowered state;

Fig. 3 is a side view of the support dozer blade in the raised state according to the invention;

Figure 4 is a top plan view of the dozer blade according to the invention;

Figure 5 is a schematic front view of the undercarriage frame with the split bracket attached thereto in accordance with the invention; and

Fig. 6 is a plan view of another embodiment of the support dozer blade with a split carrier according to the invention.

Fig. 1 shows a support dozer blade 1, which on a not shown Work vehicle is attached and can be tilted around the vehicle's longitudinal axis, to compensate for a sloping terrain. According to the invention Support dozer blade 1 is inclined at an angle α with respect to the horizontal, which essentially ranges from 0 ° to 10 ° or 20 ° and in particular can be limited to a range from 0 ° to 5 °.

The leveling dozer blade 1 is supported by a parallel guide 2, 7, which at least is constructed from an upper link 7 and a lower bracket 2, essentially guided vertically aligned. If a cylinder 4 or 5, which is the Raise and lower the dozer blade, do not operate and the other cylinder 5 or 4 is pressed, the dozer blade 1 rotates around the horizontal. The Parallel guides 2, 7 are rotatably mounted on the machine side with only one degree of freedom, however, rotation of the support dozer blade can damage the kinematics. Therefore, this rotation is limited to a range by a locking element 3, such as explained in more detail below.

In Fig. 2 the leveling dozer blade is lowered in one by the cylinders 4, 5 State shown without locking element. The cylinders 4, 5 are extended, which, like the upper and lower element of the parallel guide 2, 7 on the shield side are articulated, and the cylinders 4, 5 also on the machine side on one Machine frame 6 are articulated.

In contrast to FIG. 2, FIG. 3 is a side view of the dozer blade 1 shown with the locking element 3 in the raised state, the cylinders 4, 5th are retracted. By parallel guidance of the upper link 7 and the lower Carrier 2 is the leveling dozer blade 1 through the evenly extended Cylinder 4, 5 in a substantially horizontal position with respect to the vehicle.

From the top view of Fig. 4 and in connection with the schematic 5, the features essential to the invention can be seen. The Cylinders 4, 5 are on the one hand on the machine frame 6 and on the other hand on the Support dozer blade 1 rotatably arranged and can be controlled individually to be able to level the work vehicle horizontally in sloping terrain. This different control of the hydraulic cylinders 4, 5 would at a conventional parallel guidance to damage the kinematics. thats why the lower support 2 is made in two parts, so that the elements of the lower support 2 can rotate against each other, with the divided carrier 2 on the machine side a hinge-like linkage 11 and on the shield side at a distance from each other lying articulation points 12, 13 is connected. By dividing the flat carrier 2, the elements of the carrier being adjacent like rotatable about an axis Door leaves behave so that the elements of the support form a dividing line 14 are separated, the edges of the elements of the carrier 2 lead at the inclination of the Support leveler 1 a relative movement.

In the embodiment shown in FIGS. 1 to 5, the is along the Supporting dozer blade extending lower beam 2 in the area of its left end divided by a dividing line 14. By a locking element 3, which the profile of the divided, torsionally rigid support partially surrounds the elements of the lower beam 2 are connected to each other. It is particularly advantageous that the carrier 2 is designed torsionally rigid that the movement of the elements of the divided carrier is stopped by the locking element 3 without essential Deformation of the carrier 2 occur.

Due to the game x between the one element of the lower beam 2 and the locking element 3, it is possible that a cylinder 4, 5 compared to each other cylinder 5, 4 is extended further or less, so that a Inclination of the dozer blade 1 results, due to the game x the kinematics of the dozer blade 1 is not damaged. So the support dozer blade 1 versus its horizontal orientation depending on the game between the lower torsionally rigid support 2 and the locking element 3 are inclined so far, until there is a mechanical stop between the carrier 2 and the locking element 3 results, so that the relative movement of the edges of the dividing line 14 is limited.

The game x shown in Fig. 5 between the divided carrier 2 and the Locking element 3 can, however, by means of a shaped plate or intermediate element, not shown be compensated for, which between the divided carrier 2 and the locking element 3rd is used so that the elements of the divided carrier 2 are no longer twist against each other or can no longer move differently. Consequently the intermediate element creates a rigid connection of the elements of the divided Carrier 2, i.e. the dozer blade 1 cannot be tilted. It follows a plane-parallel operation of the support dozer 1, so that Support dozer blade 1 can be used for leveling work. This The intermediate element can, for example, by a screw connection either on the divided carrier 2 or secured to the locking element 3.

6 shows a further embodiment of a support dozer blade, which can be tilted around the vehicle's longitudinal axis. In this embodiment the divided carrier 22 is divided in its central region by a dividing line 14, the split beam 22 extending along the longitudinal direction of the dozer blade 1 extends, the divided carrier 22 on the machine side via a hinge-like Articulation 11 and on the shield side via articulation points 12 spaced apart from one another, 13 is connected. The two elements of the divided carrier 22 can thus rotate against each other or move differently to an inclination of the To enable support dozer blades. However, these two elements of the divided carrier 22 can be connected by a bolt 33 which consists of one Element of the divided carrier 22 protrudes and into an opening 44 of the other divided carrier protrudes. The diameter of the bolt section 33a is Bolt 33, as shown in Fig. 6, smaller than the inner diameter of the corresponding Bore 44 in the other element of the split beam 22. Because of this resulting game between the locking element 33 and the corresponding opening 44th in the element of the split carrier, the split carrier can be limited against each other be moved so that the inclination of the support dozer blade by the position of the Pin 33 is limited, in which the pin 33 to the opening 44 of the divided Carrier 22 strikes.

This bolt 33 can now mechanically or through a medium in the direction of it Axis are shifted so that the bolt 33 on the one hand further into the opening 44 of the divided carrier 22 protrudes, with the opening 44 a corresponding extent has in its longitudinal direction. If the bolt 33 continues into the opening 44 of the divided carrier 22 migrates, the bolt portion 33b of the bolt 33 with the Opening 44 of the divided carrier 22 in contact such that the elements of the divided carrier 22 can no longer move against each other because of the diameter of the bolt portion 33b substantially with the inside diameter of the opening 44 of the divided carrier 22 matches, so that a firm connection between the Elements of the divided carrier 22 is formed. Thus, the dozer blade can be used for Leveling work can be used.

If, on the other hand, the displaceable bolt 33 now completely comes out of the opening 44 of the split beam 22 is removed so that the elements of the split beam 22nd can move or twist without restriction, for example two claw supports or another split attachment on the vehicle be attached, for example, a strong leveling of an uneven To enable terrain.

In addition, further embodiments are conceivable, one Locking element, for example an elastic or deformable connection, such is arranged between the two-part steering element, so that the inclination of the Support dozer blade is limited around the vehicle's longitudinal axis.

Claims (10)

Work vehicle with an attachment, especially one that can be raised and lowered Support dozer blade (1), which by two hydraulic cylinders (4, 5) and one Parallel guide (2, 7; 22) is movable, characterized in that at least a steering element (2; 22) of the parallel guide (2, 7; 22) as a flat support (2; 22) is formed, the machine side via a hinge-like linkage (11) and on the shield side via articulation points (12, 13) spaced apart from one another is connected that the flat carrier (2; 22) is divided in two in such a way that a dividing line (14) running from the machine side to the shield side results, the edges of which at an inclination of the dozer blade (1) Execute relative movement to each other, and that the relative movement of the edges the dividing line (14) is stop-limited. Work vehicle according to claim 1, characterized in that a locking element (3; 33) the divided carrier (2; 22), which extends in the longitudinal direction of the Support dozer blade (1) extends such that it connects to one another adjustable play (X) between the locking element (3; 33) and at least one Element of the divided carrier (2; 22) is provided to incline the Limit the dozer blade (1) to a defined area. Work vehicle according to claim 1 or 2, characterized in that the divided Carrier (2; 22) through the locking element (3; 33) rigidly with each other without play is connectable, so that almost no inclination of the dozer blade (1) around Longitudinal vehicle axis is possible. Work vehicle according to one of the preceding claims, characterized characterized in that the elements of the divided carrier (2; 22) without the intervention of the Locking element (3; 33) do not communicate with each other, so that one of the undivided support dozer blade (1) different, especially divided, Extension device can be used. Work vehicle according to one of claims 1 to 4, characterized in that the blocking element (3) at least partially an element of the divided carrier (2) encloses and is attached to the other element of the carrier (2), so that the Locking element (3) as a mechanical stop between the elements of the divided carrier (2) is used to the inclination of the dozer blade (1) around the Limit vehicle longitudinal axis. Work vehicle according to claim 5, characterized in that the divided Carrier (2) through the locking element (3) and by means of a between the divided Carrier (2) and the locking element (3) insertable intermediate element without play is rigidly connected to each other, so that almost no inclination of the Support dozer blade (1) around the vehicle's longitudinal axis is possible. Work vehicle according to one of claims 1 to 4, characterized in that the locking element (3) is designed as a bolt (33) to have an opening (44) in to communicate the divided carrier (22) so that the inclination of the Support dozer blade (1) through play between the opening (44) of the divided Carrier (22) and the bolt (33) is limited. Work vehicle according to claim 7, characterized in that the bolt (33) mechanically or by means of a medium in a different position is displaceable, in which either a rigid connection of the divided carrier (22) or a connection of the divided carrier (22) limited by play can be produced or the elements of the divided carrier (22) do not communicate. Support dozer blade (1), which by two hydraulic cylinders (4, 5) and one Parallel guide (2, 7; 22) is movable, characterized in that at least a steering element (2; 22) of the parallel guide (2, 7; 22) as a flat support (2; 22) is formed, the machine side via a hinge-like linkage (11) and on the shield side via articulation points (12, 13) spaced apart from one another is connected that the flat carrier (2; 22) is divided in two in such a way that a dividing line (14) running from the machine side to the shield side results, the edges of which at an inclination of the dozer blade (1) Execute relative movement to each other, and that the relative movement of the edges the dividing line (14) is stop-limited. Support dozer blade according to claim 9, characterized by the characterizing features of claims 2 to 8.

Images