HU204643B - Rotary grass-scythe with the possibility of stepless cutting height control - Google Patents

Abstract

The rotary mower of the invention can be centralized at any one time, with or without rotor unit, with stepless cutting height control. Rotary shafts connecting the upper rotary mower (11), the hub parts (14) of the cutting discs (13), and the supporting bearings (18; 19) of the bearing hubs (17) of the sliding plates (16) to the support elements of the upper rotary mower (20) (21), CY HU 204 643 Scope of the description: 10 pages (including 4 sheets)

Description

Rotor shafts (21) connecting the upper drive elements (11), the hub portions (14) of the cutting discs (13) and the sliding sleeve elements (20) of the discs (16) supporting the bearing hubs (17) of the slide discs (21). ), this

CQ

HU 204 643

Description: 10 pages (including 4 pages)

Adjusting bell units (41) for supporting the upper ends (37) of the B 204 643 B with axial bearing (40) and common upper joints (54) connected thereto, associated central adjusting unit (57) and motion transmission unit (57). 59) is.

BACKGROUND OF THE INVENTION The present invention relates to a rotary mower with a central, all-rotor rotor with infinitely variable cutting height adjustment.

One of the prerequisites for high-yielding meadows and primeval grasses, as well as lucerne, red clover or other fodder forage, is to ensure the optimum height of the araria, adapted to the terrain and agro-technical requirements.

The use of rotary mowers, where the crop is cut with pre-set stubble height and high circumferential speed blades, provides a significant technological advantage if infinitely variable cutting height control can be achieved at intervals of at least 30 mm.

With known height-adjustable rotary mowers, it is usually possible to individually adjust the stubble height per rotor unit.

For the simplest rotary mowers with height adjustment, the stubble height can be increased by 10-20 mm by installing spacer rings. Equally simple is the vertical adjustment of the rotor shaft and the fixing of the set position by the upper pin, which is illustrated in the German patent KIDD No. 28 30 509. The advantages of the above solutions are the simple and cost-effective design, the disadvantages are the time-consuming adjustment and the lack of infinitely variable fin adjustment.

In order to fine-tune the stubble height, various screw, groove and articulated height adjustment devices are used.

The height adjustment of the hinges of the sliding plates, which can rotate independently of the cutting rotors, is adjustable by means of a disc with arcuate groove elements and an articulated arm with an articulated lever mechanism. Federal Patent Specification.

An adjustable spring-loaded slide plate with slotted groove elements is described by ZWEEGERS Netherlands No. 1482952. German Patent Specification.

Disadvantages of both solutions include the time-consuming height adjustment per rotor unit and the large number of parts disposed beneath the blade in the event of adverse terrain conditions.

Solutions for adjusting the axial position of the skid plate hub by sliding screw thread in a rotating unit are widely forgotten for adjusting the cutting stubble height. They are then connected to the adjusting screw by means of a special adjusting tool placed inside the guide drums. Such solutions are described in NIEMEYER SÖHNE 1915 472 and 27 03 301. Federal Patent Specifications. f

There are various solutions for adjusting the height of the hub part of the slide plate and the rotor shaft by means of a screw-adjusting tool placed inside the deflector drums Fella-Werke 33 16204. German Patent).

A disadvantage of the latter solutions is the time-consuming need for frequent adjustment claims, as the addition of adjustment auxiliary times per rotor unit can result in significant shutdown times. The same back injury can be found in CLAAS No. 2565 454 of the Federal Republic of Germany. French patent specification, wherein the hub part of the slide plate or the end of the rotor shaft is screw threaded and secured in position by means of spring-fastening elements placed in the retaining tabs. These latter elements, arranged in the space below the cutting disc, can only be accessed with a special tool in an unfavorable mounting position.

FREDRICH KLAUSING No. 23 38 593 provides a combination of cutting height adjustment for rotor units, which can be performed separately. The solution described in German Patent Specification, wherein the individual rotor unit adjustment is provided by a screw-threaded upper handwheel and sliding rods connected to the latter's suspension frame, which extends into the inner space of the deflector drum, and turning. With this solution, cutting height control is more time-consuming, but the push rod design tends to be tensioned and results in significant weight gain.

In practice, in the case of rotated mowers, the greatest difficulty when designing the power take-off drive chain, ie removing the drive from the upper drive shaft in the cutting area of the cutting rotors, is to ensure that the rotor parts the bearing of a sliding plate arranged in the space below the cutting disc, which can be rotated independently of the rotation of the cutting disc. Because more advanced adjustment and handling comfort requires upper height adjustment from rotary mower designs, it is generally necessary to provide rotor blades with high propulsion power and also for axial sliding in the space above the blade disc.

In practice, this problem has been solved by employing robust sleeve systems, which are also movable in the space above the cutting disc, and which are also fixed to the frame of the drum drum, and eccentric rods, but which add significant weight to the cutting rotors.

These structural deficiencies can be observed in the above-mentioned 1915472. and U.S. Pat. Germany

HU 204 643 B, as well as rotary height adjustment mowers manufactured by CLAAS and ZWEEGERS, which are widely used in Western Europe and in Hungary.

Pasture farming is often characterized by unfavorable field conditions, where the soil surface is uneven and the area is rocky. These often require several adjustments to the cutting height of the mowing rotors in order to save the cutting wheel and ensure continuous operation.

According to the literature, there is no known rotary cutting mechanism which optimizes the cutting height without the need for time loss.

The object of the present invention is to eliminate the shortcomings of known height-adjusting rotary mowers and to provide a power-saving structure with a power transmission structure with a rotary power transmission and a power-saving design with a rational power transmission solution that optimally adapts to the field conditions and technological demands.

The present invention has led to the discovery that cutting height control, which provides the best possible operating comfort for the cutting rotors, providing both center and rotor unit adjustment, as well as weight-saving and reliable power transmission, can be achieved with a rotary For cutting rotor shafts with a height adjustment function, the axial adjustment effect is provided via an upper structural node for rotary axial transmission, thereby providing quick individual and central manual adjustment or hydraulic remote control.

The novelty and advancement of the device according to the invention lies in the fact that its cutting tools provide hinging height adjustment which is optimally adapted to difficult terrain conditions and technological requirements, with minimal time-consuming manual or remote control from the driver's seat of the base machine. .

To accomplish this objective, the upper drive elements of the gear housing enclosed in the flanged extended bearing housings, the lower part of the hollow shaft of the lower gear and the lower part of the hollow shaft of the lower bearing discs and connecting rotor shafts fixed to the latter, to which they were assigned adjusting bell bearings supporting their upper ends by axial bearing, and these were connected to the upper pivot of the upper pivoting pivot of the upper pivoting pivot of the upper pivoting pivot wrists and amozg stovábbító unit connection hinge members.

The invention will now be described in more detail in the accompanying drawings.

Fig. 1 is a front elevational view of a rotor mower of the present invention with elevated axially displaced components during height adjustment AH.

Figure 2 is a sectional view of an axial displacement limiter assembly of a rotary mower of the present invention.

Figure 3 is a perspective view of a preferred embodiment of a rotary mower of the present invention mounted on a power machine.

Fig. 4 is a perspective view of a preferred embodiment of a rotary lawn mower of the present invention with a parallelogram arm suspension system and a center drive, which can be front mounted on a power machine.

Fig. 5 is a front elevational view of a V-belt drive version of a rotary height adjustable mower according to the invention.

As shown in Fig. 1, a gearbox (2) arranged in the gear housing (1) and adapted for torque transmission carries the drive element (3) of the upper drive (3), preferably with a pinion bearing housing (5). The gear housing and its receiving flange (6) are connected via a common cut-out (7) to the gear housing (1) and to the elongated bearing housing (9), which is secured by flanges (8). In the upper bearing (10) of the latter, the upper drive element (11) provided with an inner cavity for torque transmission, which is a bevel gear connected to the drive element (3), is housed. The latter, as well as the hub part (14) of a pulley (13) fitted with an inner cavity (13), which is mounted in the lower bearings (12) of the flanged elongated bearing housing and connected to its lower sleeve (15). The sliding sleeve member (20) bearing the upper and lower support bearings (18) of its holding hub (18) is connected by a rotor shaft (21) adapted for torque transmission. The stop member (24) supported by the retaining rings (23) disposed on the rotor shaft (21) is slidably disposed in the sealing ring (22) embedded in the central portion of the flanged extended bearing housing (22). .

To the elongated flange bearing housing (9), the lower end cap (26), which closes the lower bearing space (12), is fastened to the lower bearing space (12) by means of retaining screws (25).

The cutting disc (13) is connected to the hub portion (14) by screw fasteners (28) which also hold the labyrinth disk (27) and support the deflection drum (30) with guide blades (29), which is supported from above by flanged bearing housing connected to an upper cover (31) supported by a receiving flange (6) of the gear housing (1). On the lower circumference of the cutting disc (13), fixed thereto, the lower part of the slide plate (16)

The cutting blades (32) are disposed over a distance I from the plane I to H _mIn -H _max .

The hub portion (14) of the cutting disc (13) and the sliding sleeve member (20) attached to its lower sleeve projection (15) are connected by a protective bellows member (33) to provide dust protection for the sliding surfaces.

The lower end of the rotor shaft (21) is connected to the lower receiving portion of the sliding sleeves (20) and the locking pin (34). The sliding plate 16 is connected to the retaining hub 17 by its outrigger 35 and lower screw 36.

The adjusting bell unit (41) is connected to the upper end (37) of the rotor shaft (21) with a threaded thread (40) by means of an axial bearing (40) fixed by a locking nut (39). The latter is provided with a through groove (42) for cutting height adjustment (ΔΗ) for guiding the drive shaft (2).

The terminal member (46) of the adjusting bell assembly (46) extends out of the gear housing (1) via the sealing insert (45) secured to the gear housing (1) by means of a sealing insert (45) secured by clamping screws (43). the upper end (47) is connected to the upper end. The latter is connected by the sliding eyelets (48) to the lifting plates (53) of the angular lifting unit (52) pivotally mounted on the support pin (50) of the support bracket (49). An upper joint joint is provided with an upper joint (54) and is connected to the upper ends of the lifting plates (53) of the angular lifting unit (51) and to the holding flaps (56) connected to the lower housing (55). 57) upper hinges of the central adjusting unit (58) and connecting hinges (60) of the movement control unit (59). The connecting hinge member (60) of the other end of the motion transfer unit (59) is connected to the upper hinge (54) and the angular lifting unit (51) of the adjacent rotor assembly.

The lower (55) and upper (58) joints are connected to the central actuator (57) by means of a right and left-hand threaded screw connection, forming a screw-actuated actuator. In place of the latter, a hydraulic cylinder unit (61) may be arranged, which is connected via the double non-return valve (62) to the hydraulic conduit system (63) of the supporting self-propelled base machine. With the exception of the upper elements controlling the axial adjustment of the rotor shaft (21), a simplified arrangement is shown in FIG. 2 wherein the upper end (37) of the rotor shaft (21) is threaded by a locking nut (39) axial displacement limiter assembly (64) supported by an upper drive member (11) bounded by a stop sleeve. By eliminating the latter unit and by additionally installing the elements for controlling the axial adjustment of the rotor shaft (21), the cutting height adjustment arrangement of Fig. 1 can be provided with minimal installation time.

As shown in Fig. 3, a preferred side-mounted twin-rotor arrangement of a height-adjustable rotary mower coupled to the rear three-point linkage of the power unit comprises a pivoting frame (66) with an adhesive leveling mechanism (65) attached to the machine pivot points. 67) A guide pin extending to the side and retracted in the transport position by a vertical pin. The latter is connected to the gearbox (I) by means of a horizontal swivel joint (69). The suspension frame (66) and the guide levers (68) are provided with a support unit (70) for securing the working and transport position and also forming a safety release member.

The power take-off shaft is connected to the main shaft (71), the main gear (72) and the drive shaft (73) to the gear shaft (2) of the gearbox (1). The cutting passages underneath the gear housing (1) are delimited by the upper bumpers (74). As shown in Figure 4, the height adjustment stem rotary mower another preferred - frontally mounted power machine - middle behajtású two vágórotoros arrangement of (75) curved headstock of (76) paralelogrammakaros articulated suspension system ¹ unit, and (77) The suspension springs are attached to the (1) Clamping elements (78) of gearbox. A drive shaft (79) operable to drive the power unit and a drive housing (80) for mounting it are arranged in the center of the gear housing (1).

As shown in Fig. 5, the axial adjustment controls for the rotor shaft of the rotary mower according to the invention are arranged in the interior of the gearbox (1), where the upper drive element (11) provided with an inner cavity for torque transmission is flexible. V-belt pulley associated with an endless drive element.

The hub part thereof is mounted in the bearing housing by the upper clamping bolts (82), which are connected to the gear housing (1) and the flanged elongated bearing housing (83), in the bearing housing (84). The adjusting bell unit (41) is connected to the upper end (37) of the rotor shaft (21) by means of a threaded bearing (39) fixed by a locking plate (39). The latter and the clamp (86) fixed to the upper drive element (11) by means of clamping screws (85)! tie. (87) Upper accordion, which provides dust protection for the upper axial compartment.

To the adjusting groove assembly (41), the angled lifting member (51) coupled to the outlet pin (88) is directly connected to the upper hinge (54) at the common upper structural switching point.

All other structural members associated with the rotor assembly and their relationship to Figure 1 are in accordance with the preferred embodiment of the invention.

The present invention is not limited to FIGS. 7 to 8. The height-adjustable rotor assembly of Figures 1 and 5 can be provided in practice with any number of rotors and in any angle arrangement for the direction of travel. Studying Figure 1-3 - the following:

The gearbox shaft (2) or drive shaft (79) or the bend (81) of the gearbox (1) of the apparatus, respectively (4)

The propulsion unit B receives its propulsion from the carrier base machine directly via the main PTO (71) or via the main gear (72) and the PTO (73). The torque is transmitted to the rotor shafts (21) of the rotor assemblies via a tapered gear connection between the drive element (3) and the upper drive element (11) or by means of a belt drive. The rotor shaft 21 performs a dual function by driving the cutting disc 13 through its hub portion 14 and by moving axially the slide plate 16 on the ground, thereby providing the cutting blades 32 with the ground surface. its relative distance is adjustable between H _{min and} H _max .

The cutting discs (13), in opposite directions of rotation in the indicated direction of rotation, cut the stems of the forage crop at a controlled cutting height and stack the cut fodder between them, respectively. Independently of the cutting discs (13), the sliding plates (16) can rotate when frictionally ground, sparing the forage area of the forage crop.

The axial adjustment of the cutting plane as required can be infinitely controlled by remote adjustment of the central actuator (57) or actuation of the hydraulic cylinder (61) from the operator's cab. Actuation of the central adjusting unit (57) transmits the radial displacement of the upper hinge (54) via the angular lifting unit (51) pivoting about the support pin (50), or via the lever (47) and the outlet member (46). adjusting bell unit which axially engages (40) exerts an axial adjustment effect on the upper end (37) of the rotor shaft (21). As a result of this adjustment, the stop sleeve (24) attached to the rotor shaft (21) slides in the sealing ring (22) defining the lubricant space of the upper drive and the sliding sleeve member (20) connected to the rotor shaft (21). 14) at the lower projection of the hub portion (15). The latter moves the slide plate (16) through the upper support bearings (18) and the lower support bearings (19) and the hub part (14). The radial displacement (s) of the upper hinge (s) (54) arranged in the common upper structural connecting pylons (s) is transmitted by the motion conveyor (s) (59) to the adjacent rotor assembly (s). ) (21) to the angular lift unit (i) for axial displacement of the rotor shaft (i).

Dust protection of the axial adjustment spaces and sliding surfaces is provided by the folding or expanding protective accordion element 33, preferably made of elastic material, and the upper guard accordion 87 and the labyrinth dial 27. The stop sleeve (24) is in contact with the upper drive element (11) at the height H _{min of the} cutting blades (32). In the same position, the axial displacement limiter (64) is mounted and secured in an arrangement without height adjustment, but which at any time allows additional mounting thereof. During operation of the rotary mower according to the invention, the track surface is guided to the suspension frame (66) by the vertical link (67) and its horizontal pivot link (69) with the gearbox (1) or, in the front, by the arch (75). The parallelogram arm (76), which is coupled between the suspension frame and the gearbox (1), and the pivoting springs (77) are used.

In the lateral mowing working arrangement, the lateral guide arm (68) and the mounted cutting rotors (6) can be folded back behind the mounting frame (66) without transport drive shaft (67) in transport position without removing the drive cardan (73). position.

The advantages of the rotary mower according to the invention are as follows:

- allows cutting height adjustment for cutting rotors, ensuring comfortable handling comfort, remote control from the driver's seat of the base machine, adjusting both center and rotor units,

- provides an optimal stubble height when mowing fodder crops, which is optimally adapted to unfavorable field conditions and current agrotechnical requirements,

- engages the upper drive elements with a cutting disc and a rotatable slide plate located underneath the cutting disc, with as few components as possible and in a low-weight design; this can result in significant cost and cost savings,

- the rotor shaft preferably has both a power transmission and a cutting height adjustment function, and the latter function can be limited or restored with a minimum of assembly requirements,

- with its rational power transmission and structure, it can be mounted on a self-propelled base machine or connected to the front, with either a lateral or a center drive, in two and multi-rotor versions.

Claims (3)

PATENT CLAIMS 1. Rotary mower with infinitely variable cutting height adjustment, which may be connected to a power machine either front-mounted or at its rear three-point linkage by means of a spring-loaded suspension frame, a vertical or horizontal pivoting support frame, a pivoting hinged linkage or a hinged linkage consisting of two or more cutting torches with baffles and sliding plates, characterized in that the upper drive element (11) provided with torque transmissions (11) directly mounted in flanged extended bearing housings (9) fixed to the gear housing (1) or in intermediate bearing housings (83), and a cutting disc with inner cavity mounted in the lower bearings (12) of the flanged elongated bearing housings (9) the hub portions (14) of the sacks (13) and the pin bearings (18) connected to the lower vaginal projections (15) of the hub portions (14) and supporting the hubs (17) of the sliding plates (16); 19) rotor shafts (21) connecting the carrier sliding sleeve members (20), adjusting chuck units (41) supporting their upper ends (37) with axial bearing (40), and the latter directly or to the output members of the adjusting bell units (41). (46) connected by means of coupled nail lifting units (51) arranged at common upper structural attachment points (54) and central to or at one of these. has adjustment unit (s) (57) and motion unit® (59). 10 A lawn mower according to claim 1, characterized in that the central actuator unit (57) is a screw screw actuator (s) or, preferably, a hydraulic cylinder unit (s) (61) integrated in the same location. Rotary lawn mower according to claim 1 or 2, characterized in that it has axial displacement limiting units (64) fixed to the upper ends (37) of the rotor shafts (21) and supported by the upper drive elements (11) bounded by the stop sleeves (24). .