SK282422B6 - Bearing frame of agricultural harvesting machine, particularly rotary harvesting machine - Google Patents

Abstract

The support frame (1) for connection to the front three-point hydraulic lifting hinge of the tractor consists of a support arm (3) on which the base frame (2) of the mower is suspended by means of a central hinge (4). The support arm (3) is positioned centrally with respect to the base frame (2). The base frame (2) is attached laterally from the central hinge (4) through the joints (5, 5 ', 6, 6') of the adjusting members (7, 7 ') to the support frame (1). The central joint (4) between the support arm (3) and the base frame (2), the rear joints (5, 5 ') of the adjusting members (7, 7') facing the support frame (1) and the front joint (6, 6 ') ) of the adjusting members (7, 7 ') facing the base frame (2) are designed as ball joints. The front joints (6, 6 ') are in the working position positioned higher than the rear joints (5, 5') with respect to the horizontal. The support arm (3) is formed forward on the support frame (1) in the driving direction (20) and a support bracket (19) is formed in its front part at the height of the base frame (2) and downward. The central hinge (4) is fixed to the base frame (2), however, by means of a support bracket (23) and yet to the support arm (3) by the support bracket (19).

Description

Technical field

The invention relates to a support frame of an agricultural harvesting machine, in particular a rotary mower, for connection to a front three-point hydraulic lifting linkage of a tractor comprising a support arm on which the base frame of the mower with lateral swiveling is suspended by means of a central hinge. The support arm is disposed centrally with respect to the base frame, and the base frame is mounted laterally from the central hinge through the joints of the adjusting members to the support frame.

BACKGROUND OF THE INVENTION

Known load-bearing frames of this kind are most often used for mowers that track unevenness of the terrain as far as possible without inertia so as not to leave undamaged areas and to cause failures by damaging or plucking a part of the grass or driving the mower into the ground. It is important that the frames of the mower do not only move up and down, but also be able to be in an inclined position.

DE 33 22 030 discloses a known support frame for a front mower with mowing drums, to be mounted on a three-point lifting linkage of a tractor, in which the mower frame is hinged on a support frame pivotable about a horizontal axis and is provided with a reversible limitation spring elements. The height adjustment is effected by the floating adjustment of the three-point lifting linkage parallel to the horizontal position of the cutting discs. This arrangement does not have the ability to align the mower frame position against the ground.

DE 67 50 238 describes a front support frame for a rotary mower with mowing drums mounted on a tractor. The mower frame may also be pivotable about a centrally arranged horizontal axis. In addition, the mower has a cross-beam frame which is adjustable about a horizontal axis and is articulated to the two front loading rocker levers. The intermediate frame is adjustable in an upright position in which the mowing plates lie on the ground using two adjusting spindles, which are articulated between the intermediate frame and the front loading rocker levers.

The disadvantage of this arrangement is that it does not have a three-point lifting hitch that ensures parallel vertical movement of the mower frame, as well as alignment of the adjusting screws, which can cause the mower to move unfavorably to the terrain when swiveling to the ground. damages and breakdowns, as the cutting discs may stuck in the ground or sometimes tear grass in certain positions. An additional intermediate frame makes this arrangement more expensive and complicates its manufacture.

SUMMARY OF THE INVENTION

These drawbacks are largely eliminated by the support frame of the agricultural harvesting machine, in particular the rotary mower, for attachment to the front three-point hydraulic lifting device of the tractor, comprising a support arm on which the base frame of the mower with lateral swiveling is suspended via a center joint. the arm is positioned centrally with respect to the base frame, and the base frame is laterally attached from the center joint through the adjuster joints to the support frame, the principle being that the center joint between the support arm and the base frame, the rear joints of the adjusters facing the support The frame and front joints of the adjusting members facing the base frame are designed as ball joints. In the working position, the front joints are positioned higher than the rear joints on the shaft relative to the horizontal.

According to a preferred embodiment, the support arm on the support frame is formed in a forward direction in the direction of travel, and in its front part is formed at the height of the base frame and a downwardly directed support bracket. The center joint is fixed to the base frame by means of a mounting bracket and to the support arm by means of a mounting bracket.

According to a further preferred embodiment, the front joints of the adjusting members are disposed between upwardly oriented booms, which are fixed in the lateral parts of the base frame and which are located on the side of the base frame facing away from the travel direction.

According to a further preferred embodiment, the bearing bracket is provided with an extension which is formed as a holder of the input drive line.

According to a further preferred embodiment, stops on both sides under the adjusting members are fastened to the base frame to limit the lateral rocking movement of the base frame.

According to a further preferred embodiment, an adjusting device is mounted on the shaft in which the upper stop and the lower stop are received.

According to a further preferred embodiment, the adjusting device is provided with adjusting means for remote control of the adjusting device from the tractor.

The main advantage of the support frame is that it is designed to be mounted on a three-point linkage of a tractor suitable for the use of a rotary mower, especially with mowing drums. A further advantage is that the suspension of the mower base frame can perform vertical movements and assume transverse angles of travel without causing breakdowns or even damage to the machine or stand. The proposed solution opens up further possibilities of lateral compensation of movements caused by the adaptation of the terrain. The support frame also dampens particularly effective lateral oscillations and the resulting oscillation of the base frame without the need to relieve the mower of the mower. The arrangement of the stops makes it possible, by aligning the torques to be produced, to make the damping stabilization of the harvesting machine particularly simple even for considerable lateral tilt.

The use of spherical joints allows a wide range of lateral alignment movements as a result of soil adaptation, while the adjustment members allow them to be adjusted and align the base frame and thereby the mowing tools first, since their design determines the course of movement that occurs during lateral pivoting of the base frame, All the elements allow a constant advantageous position of the mowing drums to the ground, even when uneven.

The articulated connection of the support frame via the support arm with the support bracket to the base frame by means of ball joints allows for a free, balanced and pendulum movement of the base frame by means of a central joint. The use of a mounting bracket allows the choice of a suitable and favorable geometry of the linkage to lift the base frame up to a height that determines its lateral movements on uneven ground immediately to the base frame.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a side view of a support frame, and FIG. 2 shows a plan view of a supporting frame.

DETAILED DESCRIPTION OF THE INVENTION

The support frame 1 of the agricultural harvesting machine, in particular the rotary mower, is symmetrical about its longitudinal axis, which is parallel to the direction of travel of the mower. The support frame 1 consists of an extension 21, at the lower end of which two connections are provided to connect the left lower drawbar 22 and the right lower drawbar 22 'to the front three-point hydraulic lifting linkage of the tractor whose upper drawbar 30 is connected to the upper end of the extension 21 and whose spring 31 is attached to the lower end of the extension 21. A support arm 3, arranged in the direction of travel 20 above the working part of the mower, is attached to the extension 21 on the far side of the lower links 22, 22 'with its rear end. At the front end of the support arm 3, a support bracket 19 is arranged downwardly, at the lower end of which a central joint 4 is formed, which is mounted between two arms of the support bracket 23 fixed to the base frame 2 of the mower. An extension is provided on the support bracket 23, which also serves as a support for the input drive line 24, so that the center joint 4 is mounted immediately on the base frame 2 away from the extension 21 in the travel direction 20. On the underside of the base frame 2 are mounted mowing drums 27 with mowing discs 28. By using the support arm 3 it is possible to select a suitable geometry of the hinges for lifting the base frame, which determines the course of shunting movements against uneven terrain. The positioning of the central hinge 4 very deep in the mower is very advantageous, since the working tools are thus lifted forward in the pivoting pivoting movements.

The base frame 2 has a left side portion 12 and a right side portion 12 'above which a first right boom 11 and a second right boom 11' extend upward. On the left side portion 12, the first left boom 10 and the second left boom 10 'extend upward. Between the left booms 10, 10 ', a left front joint 6 of the left adjusting member 7 is positioned towards the extension 21, the left rear joint 5 facing the extension 21 is fixed to the left shaft 25.

Between the right booms 11, 11 'towards the extension 21 is located the right front joint 6' of the right adjusting member 7 ', the right rear joint 5' facing the extension 21 is fixed to the right shaft 25 ', which is transversely oriented 20 of the travel and which is supported on a crossbeam 26 which is fastened to the extension 21. Center joint 4, rear joints 5, 5 'and front joints

6, 6 'are designed as ball joints which allow the base frame 2 to swing. The upwardly oriented booms 10, 10', 11, 11 'allow suitable alignment of the adjusting members, which are preferably shaped like screw spindles.

The shaft is provided with a non-rotatable adjusting device 14, at the end of which a left stop 13 with a left-hand arm 32 is fixed to contact with the left adjusting member

7, wherein the left arm 32 is located below the left adjuster 7.

Also, at the end of the adjusting device 14, a right stop 13 'with a right-hand arm 32' is fastened to the right-hand adjuster 7 ', the right-hand arm 32' being located below the right-hand adjuster 7 '. To prevent damage or noise, the use of resin stops 13, 13 'is very advantageous. The adjusting device 14 is provided with adjusting means 17 in which the upper stop 15 and the lower stop 16 are mounted, which are fixed at the upper end of the support bracket 19. The adjusting device 14 with the adjusting means 17 formed by the hydraulic cylinder is remotely actuated from the seat driver.

In the basic position 8 of the shaft, i. j. when the mowers 28 are still lying horizontally on the ground, the adjusting members 7, 7 'lie on the stops 13, 13', face upwards and clamp with the horizontal angle 9. The front joints 6, 6 'are higher than the rear joints 5 with respect to the horizontal. , 5 '. This achieves that, in the lateral pivoting movements of the base frame 2, the mowing drums 27 and the mowing plates 28 are lifted in the upward travel direction 20, thereby avoiding ground penetration and thus, to a large extent, ground adaptation to a large extent . The adjusting members 7, 7 'thus serve to adjust the basic position 8. The stops 13, 13' limit the movement of the mower upwards and thus limit the movements on large uneven terrain.

In the case of uneven terrain or recesses of larger dimensions, the mower as a whole is raised or lowered by the support frame 1 being actuated by the lower drawbars 22, 22 'and the upper drawbar 30 of the three-point hydraulics engaged in a floating position. In addition, a spring 31 is used to adapt the mower to the ground.

If one of the two lateral portions 12, 12 'drops due to ground unevenness, the opposite lateral portion 12, 12' or vice versa is lifted simultaneously, with the downwardly corresponding respective adjusting member 7, 7 'carrying the adjusting device 14 and the shaft engaging the downward movement of the respective of the side part 12, 12 ' 'by the respective adjusting members 7, 7 '

During driving on the road, the mower only carries out slight, strongly damped rocking movements, since the adjusting members 7, 7 'contact the adjusting device 14 while the front three-point hydraulic lifting linkage holds the mower raised upwards.

Claims (7)

PATENT CLAIMS 1. Supporting frame of an agricultural harvesting machine, in particular a rotary mower, for connection to a front three-point hydraulic lifting linkage of a tractor, consisting of a support arm on which the base frame of the mower with lateral swiveling is suspended by means of a central joint on the base frame centrally and the base frame is fixed laterally from the central joint through the joints of the adjusting members to the support frame, characterized in that the central joint (4) between the support arm (3) and the base frame (2), the rear joints (5, 5) ') the adjusting members (7, 7') facing the support frame (1) and the front joints (6, 6 ') of the adjusting members (7, 7') facing the base frame (2) are designed as ball joints, wherein the front hinges (6, 6 ') are positioned higher than the rear hinges (5, 5') on the shaft in the working position relative to the horizontal. Support frame according to claim 1, characterized in that the support arm (3) is formed on the support frame (1) forwards in the travel direction (20) and is formed at the front of the support frame (2) in the direction of a downwardly directed support bracket (19), the center joint (4) being fixed both to the base frame (2) by the support bracket (23) and to the support arm (3) by the support bracket (19). Support frame according to claim 1, characterized in that the front joints (6, 6 ') of the adjusting members (7, 7') are mounted between upwardly extending booms (10, 10 ', 11, 11'), which are fixed in the lateral portions (12, 12 ') of the base frame (2) and which are located on the away side (20) of the base frame (2). Support frame according to claim 2, characterized in that the bearing bracket (23) is provided with an extension which is designed to hold the input drive line (24). Support frame according to one of Claims 1 to 3, characterized in that stops (13, 13 ') are fixed on both sides of the base frame (2) below the adjusting members (7, 7') to limit the lateral rocking movement of the base frame. frame (2). Support frame according to claim 1, characterized in that an adjusting device (14) is mounted on the shaft in which the upper stop (15) and the lower stop (16) are mounted. Support frame according to claim 6, characterized in that the adjusting device (14) is provided with adjusting means (17) for remote control of the adjusting device (14) from the tractor.