FI121124B - moldboard - Google Patents

Description

FIELD OF THE INVENTION

The invention relates to a base blade as defined in the preamble of claim 1.

BACKGROUND OF THE INVENTION

The chassis is used in work vehicles such as trucks and tractors to maintain and / or modify masso-10 in road maintenance.

The undercarriage is located under the vehicle frame between its axles. The blade can be used in both summer and winter. In the winter, plowing snow, leveling the ice blade, and removing sludge can be done with a blade at the same time as other road maintenance work. In the summer, gravel paths, gravel and other masses are moved and leveled efficiently with a blade.

20 Formerly known is a truck chassis, which includes a base blade with a first road blade in contact with the ground at the bottom. The sliding body is guided to move in the direction of the base blade under the guidance of the Liu guides. The extension blade is connected to the Liu-25 trunk to move with respect to the base blade between the first position and the second position. In the first position, the extension blade is extended outward from the base of the base blade at a distance. In the second position, the extension blade is retracted to a position where the extension blade 30 substantially overlaps the base blade. At the bottom of the extension blade is a second blade to contact the ground. An extending / shortening type of power, such as a hydraulic cylinder, is arranged to act between the slider body and the base blade to move the extension 35 between the first position and the second position.

2

A problem with known extender blades is that, when extended, the extension blade is at the front or rear of the blade during use, depending on which side it is relative to the blade. 5 In this case, the Blades of the main and extension blades are aligned with each other. This causes a discontinuity in the working pattern such that the working depth at the extension blade is different, for example deeper or shallower, than at the base batch. Furthermore, the difference in the working depths 10 varies according to the angle at which the base blade is inclined with respect to the ground.

PURPOSE OF THE INVENTION

The object of the invention is to eliminate the aforementioned disadvantages.

In particular, it is an object of the invention to provide a sub-blade in which, during use, the blade of the extension blade is always in alignment and plane with the blade of the base-20 blade, regardless of the respective angle of the blade to the ground.

SUMMARY OF THE INVENTION

The carrier blade according to the invention is characterized in what is claimed in claim 1.

According to the invention, the extension blade is pivotally hinged to the slider body so as to pivot about the pivot axis parallel to the base blade so that in the first position of the extension blade with the base blade pressed against the ground, the extension blade is pivotable with the base blade.

An advantage of the invention is that the second blade of the extension blade always operates in the same line and in the same cutting plane with the first blade of the base blade regardless of the respective angle of the base blade with respect to the substrate, so the blade and base blade always have the same cutting depth.

5 In one embodiment of the blade, the extension blade is on the front of the blade and the slide body is on the back of the blade.

In one embodiment of the base blade, a stop is fixed to the base blade, adapted to limit the turning of the extension blade to a position where the first blade and the second blade are aligned with each other.

In one embodiment of the knife blade, the joint is on the upper and back sides of the knife blade 15.

LIST OF FIGURES

In the following, the invention will be described in detail with reference to the accompanying drawings, with reference to the accompanying drawing 20, in which Figure 1 is a perspective view from the rear of a part of an embodiment of the base blade according to the invention; Figure 2 is the base blade of Figure 1 in retracted position; Fig. 4 shows the base blade of Figs. 2 and 3 pressed against the ground, 35 Fig. 5 shows the side blade in the position of Fig. 2 or 3, 4 Fig. 6 shows the side blade in the position of Fig. 4, and Fig. 7 illustrates tilting 5 of Fig. 6.

DETAILED DESCRIPTION OF THE INVENTION

Figure 1 is a view of the left end of a chassis blade that can be mounted under a work vehicle such as a truck 10 or a tractor. Figures 2-4 illustrate the positioning of the blade extension blade 5 in the operating position.

Referring to Figures 1-4, the base blade has a base blade 1. At the bottom of the base blade 1, there is a first blade 2. The base blade 1 is provided with slides 3 parallel to the base blade and guided by a slider body 4 . The hydraulic cylinder 1 'is connected at one end to the base blade and at the other end to the sliding body 4 for moving the extension blade 5 between the first position I and the second position II. The jet blade 5 is connected to the slider body 4 to move relative to the base 25 blade 1 between the first position I and the second position II.

In the first position I shown in Figures 3 and 4, the extension blade 5 is extended outwardly to the outer end 30 of the base blade 1 at a distance 1.

In the second position II shown in Figures 1 and 2, the extension blade 5 is retracted to a position where the extension blade 5 is substantially overlapping with the base blade 1 so that the extension blade 5 is in front of the base blade 1. At the bottom of the extension blade 5 there is a second road blade 6 which is in contact with the ground.

5

The figures show that the first roadblock 2 and the second roadblock 6 are so-called. but it is clear that any suitable road blade, such as a straight blade, a hole blade, a tooth blade, can be used.

The extension blade 5 is hinged by a joint 7 to the slider body 4 to pivot about a pivot axis X parallel to the base blade 1. The hinge 7 is located with respect to the base blade 1 at its top and rear ends. The joint 7 consists of a shaft mounted on an extension blade 5 and a sleeve mounted on a sliding body 4, within which the shaft is rotatably mounted.

Figure 4 shows that with the extension blade 5 in the first outward position I and the base blade depressed against the ground R, the extension blade 5 is pivotable backwardly with respect to the base blade 1 with the second blade 6 aligned with the first blade 2.

20

Figures 1, 5 and 6 show that a stop 8 is formed on the backside of the base blade 1 consisting of two flanges welded to the base blade. The limiter 8 limits the rotation of the extension blade 5 so that it rotates at most to position 25, where the first blade 2 and the second blade 6 are aligned with each other, as shown in Figure 6.

Figure 7 illustrates that when in contact with the substrate, the blade can be rotated to various angular positions and the first blade 2 and the second blade 6 always remain in line with each other, resulting in a smooth working result.

The invention is not limited to the above embodiments only, but many modifications are possible within the scope of the inventive idea defined by the claims.

Claims (4)

1. Work vehicle's lower bite, to which belongs - a parent bite (1), the bottom of which has a first road bite (2) in contact with the ground support (R), and to which the parent bite belongs in the direction of the parent bite's sliding conductor (3) - a sliding body (4) which is movable in the direction of the parent bed in the direction of the sliding guides (3), - an extension bed (5) which is connected to the sliding body (4) movable in relation to the mother bed between a first position (I) and a second position (II), in which first position (I) the extension bed (5) is extended beyond the end of the parent bed (1) at a distance (1) and in which second position (II) the extension bed (5) is retracted in a position in which the extension bed is substantially above the parent bed, and in which the lower edge of the extension bed is a second road bed (6) in contact with the ground support, and a extendable / shortenable type member (7 ') , which is arranged to operate with flour the sliding body (4) and the parent bed (1) for displacing the extension bed (5) between the first position (I) and the second position (II), characterized in that the extension bed (5) with a hinge 25 (7) is pivoted at the sliding body (4) pivotally around a turning axis (X) in the direction of the parent bed, such that in the first position (I) of the extension bed (5) where the mother bed is pressed against the ground surface (R) the extension bed (5) in relation to the parent bed, pivotally to a pivoted position (A), in which the second road bed (6) is in the same line with the first road bed (2). 2. A lower bed according to claim 1, characterized in that the extension bed (5) is on the front of the mother bed (1) and the sliding body (4) is on the back of the mother bed. 3. A lower bed according to claim 1 or 2, characterized in that on the parent bed (1) there is fixed a stopper (8) which is adapted to limit the swing of the extension bed (5) to the position (A), in which 5, the first road bed (2) and the second road bed (6) are aligned. 4. A lower bite according to any one of claims 1-3, characterized in that the hinge (7) is on the top and back of the parent bite (1).