DE2160773A1 - Mower - Google Patents

Description

2150773

PATENT LAWYERS

DR.-ING. BY KREISLER DR.-ING. SCHONWALD

DR.-ING. TH. MEYER DR. FUES DIPL.-CHEM. ALEK VON KREISLER DIPL-CHEM. CAROLA KELLER DR.-ING. KLOPSCH DIPL-ING. SELTING

5 COLOGNE 1, DEICHMANNHAUS

Dec 6 1971 Sch-DB / ls

Massey-Ferguson Services N.V.

Abraham de Veerstraat 7A, Curacao, Netherlands Antilles

Mower

The invention relates to mowers, in particular mowers with a rotatable about an upwardly directed axis Cutting element and a mounting device for connecting the mower to a tractor in such a way that the cutting element 1st in working position to the side of the tractor.

Known mowers of the type mentioned have the disadvantage that they are too heavy, too expensive or otherwise are defective and the invention is therefore based on the object of improved mowers in this regard to accomplish.

This object is achieved in a mower by a support part close to the ground on which the cutting element is relatively is arranged rotatably to this; through one with that

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Cutting member connected to the drive, this rotating force transmission member, which consists of a Position above the cutting member is directed downwards, the attachment device pulling forces on the cutting element exercises in order to move it through the crop to be mowed only via the carrier part close to the ground and is connected to the carrier part for transmitting the tensile forces at only one end thereof.

In an expedient embodiment of the invention, a mower is proposed which is characterized by a the support part close to the ground, on which the cutting element is rotatably arranged relative to the latter; through one with that Cutting member connected to the drive, this rotating force transmission member, which consists of a Position above the cutting element is directed downwards, with the attachment device pulling forces on the Exercises cutting member to move it through the crop to be mowed only on the carrier part close to the ground and through Connecting elements of the attachment through which lifting forces are exerted on the power transmission link, and which are connected to the carrier part for transmitting the lifting forces thereon only through the force transmission member are, the lifting forces acting on the connecting elements only through the power transmission member be exercised on the carrier part.

Embodiments of the invention are based on the drawing illustrated examples explained in more detail. Show it:

1 is a schematic perspective view of a mower mounted on a tractor,

FIG. 2 shows the mower according to FIG. 1 in a rear view, partially cut away,

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Fig. 3 is a side view of part of the mower according to Fig. 1 forming attachment device seen in the direction of arrow A in Fig. 1,

Fig. 4 is a plan view of the mower according to Figs. 1 to 3,

5 shows a diagrammatic top view of the mower according to FIGS. 1 to 4 in the transport position,

6 is a perspective view of a second embodiment of the invention,

7 is a schematic rear view of a third Embodiment of the invention,

8 shows a section of the mower of FIGS. 1 to 5 associated rotor,

Fig. 9 is a plan view of part of the rotor in the direction of arrow B in Fig. 8 and

Fig. 10 is a section along the line X-X in Fig. 9.

A mower 1 with two rotors 2, 3 rotatable about upwardly directed axes is attached to a tractor 4, that the rotors are offset to one side of the tractor.

The rotors 2.3 are of a PTO shaft, not shown, of the tractor 4 via a first, second and third bevel gear 5 »6 or 7 and first, second and third drive shafts 8, 9 and 10 respectively. To transfer the drive between the gearbox 5 and the shafts 8 and 9 serve universal joint couplings

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8a (Pig. 3) and 9A. The shaft 8 includes an overload clutch, not shown.

The tractor 4 is equipped with a hydraulic power lift system equipped, to which lower links 11, 12 and an upper link 13 belong.

The mower 1 is mounted by means of an attachment device 14 with the three-point links 11, 12, 13 of the tractor 4 tied together. The attachment device 17 has an A-frame 15 mounted on the tractor arms 11, 12, 13, which consists of a vertical tubular central column 16 | and two rigidly attached to this side and after front tapered arms 17 »18 with a box profile. The lower end of each arm 17 » 18 is hinged to the respective lower link 11, 12 of the tractor. With the top of the central column 16 is a forward facing bracket 19 connected to the A-frame 15 with the upper handlebar of the The tractor hitch is coupling.

The first bevel gear 5 is arranged on a substantially horizontal leg of a stable L-shaped pivot rod 20, which in turn rotatable in the central column 16 around its upwardly directed shaft is supported w bar.

A hanging rail 21 with a box cross-section is attached to the underside of the first bevel gear 5 by means of bolts attached laterally downwards and somewhat backwards, which has an articulation point 21A is connected at its lower outer end to a rigid rotor beam 22 directed sideways. The rotor beam is flat and its cross-section is similar to that of the finger bar of a mower with reciprocating

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common knives. The hitch rail is by means of a forward-facing conventional coupling link 22A connected between its ends to the lower end of the arm 17 of the A-frame 15.

The rotor bar 22 carries the rotors 2, 3. As shown in Fig. 8, each rotor is mounted on a short upright stub axle 25 which is rigid with the rotor beam 22 is connected. Each rotor has an inverted cup-shaped disc 23A on the underside thereof a number of cutting elements or knife blades 24 are movably attached in the area of their periphery are.

Each knife blade 24 sits movably on a cylinder screw 24a, the shaft of which is narrower in three becoming sections 24B, C and D is divided. The screw traverses a curved support part 24E, the is riveted to the washer 2j5A and a threaded hole for receiving the threaded part 24B of the screw 24A. The part 24c of the screw 24A is located in an opening in the knife blade 24 while the part 24D of the screw protrudes into a blade holder latch 24F which is laid over the carrier part 24E and is riveted to the washer 2j5A. The screw 24a is accessible through an opening 24G in the washer 24A. (Figures 9 and 10).

Each rotor disk 23A stands with an aluminum hollow shaft 25 in connection, which by means of a roller bearing 26 on the steering knuckle 23 is mounted. A cylindrical crop guide drum 27 surrounds the hollow shaft and is attached to it. Each hollow shaft is supported by the respective Drive shaft 9 or 10 via bevel gears 28, 29 of the transmission 6 or 7 and one facing down with the

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Hollow shaft connected shaft 30 driven. In the case of the Rotor 2 is the drive of. the drive shaft 9 via a universal coupling Jl, which on a shaft 32, with to which the gear wheel 28 is connected, is keyed, transmitted to the bevel gear 28 of the transmission 6.

The rotors 2, J are enclosed by a cover 33, which protects people against stones and the like torn up by the rotors 2 and 3. The cover is from two laterally directed supports 34, 35 of L-shaped cross-section held above the rotors 2, 3. The pillars 34, 35 are with opposite sides of the gearbox ™ boxes 6, 7 rigidly connected and form a fixed frame with the gear boxes, which is yet to be explained Purpose serves. Sideways outwardly, the top of the gear housing 7 and the outer ends of the Supports 34, 35 mediate connecting webs 34A, 35A special rigidity.

The attachment device 14 has upper and lower lifting rods 36, 37 which raise the rotors 2, 3 for transport. The rods 36, 37 are at one end each with a Lift arm 38 in connection. The lift arm is by means of a Pin 39, which is closer to the end 40 than the end 41) is articulated to the central column l6. The lift arm is equipped with a forwardly protruding pin attachment 39A (Fig. 3), one with the central column 16 represents interlocking stop by which the Movement of the lift arm in the counterclockwise direction (Fig. 1) is limited. The upper lifting rod 36 is by means of a The pin 42 is movably connected to the lifting arm 38 at its end 41. The pin 42 protrudes into a longitudinal slot 43 the lifting rod. The outer end of the lift rod 36 is fork-shaped and attached to the outer sides of the gear housing 6 in an articulated manner.

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The lifting rod 37 engages movably with the lifting arm 38 via a pin 44 at its end 40. The pencil 44 slides in a slot 44A in the lift rod. The outer end of the lift rod 37 is pivotable to the inner one End of the rotor bar 22 connected.

Each rotor has a flattened, bowl-shaped bottom runner 45 assigned to the underside of the rotor beam 22 is attached below each rotor 2, 3. At the inner end of the rotor beam is one forward directed shoe-like runner 45A attached, the one as upwardly rearward and laterally outwardly directed grass rod 46 carries material feed directed.

A vertically adjustable, with the arm l8 of the A-frame 15 connected leg 47 serves as a supporting leg for the mower not attached to a tractor (Fig. 3)

During the transport of the mower, a projection 48 engages on the rear end of the toggle rod 20 an opening 49 of a rearward-facing locking part 50 a. The locking part 50 is carried by the arm 18 of the A-frame 15 and by a. Compression spring 51 held in position (Fig. 4). For compressing the spring 5I and releasing the attachment 48 the locking part can be moved sideways outward by hand.

During operation, the rotors 2, 3 take the in Fig. 1 and are rotated by the PTO shaft of the tractor. Each gear 4, 6, 7 increases the speed of rotation of the rotors relative to the shaft. According to FIG. 1, the rotors rotate in opposite directions and the crop cut off by the knife blades 24 passes between the drums 27 and is in a swath

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filed. During operation, the weight of the rotors 2, 3 and their mounting and drive structures supported by the runners 45, 45A sliding over the floor.

The articulated connection between the rotor beam 22 and the hitch rail 21 allows vertical levitation of the rotors in such a way that they precisely follow the contours of the ground. A corresponding movement of the lifting rod 36 is made possible by its slot 43. By the Coupling member 22A can pivot the entire rotor assembly around the axis of the central column 16 to the rear, if "the rotors hit an obstacle.

The cutting height can be adjusted by shortening or lengthening the upper link I3 of the tractor Achieve through which the rotors are tilted from the illustrated Podtionen forwards or backwards.

To pivot the mower into its transport position, the coupling member 22A is first released and then the lower links 11, 12 are raised by the power lift of the tractor. Be at the same time the A-frame 15 and the lifting arm 38 connected to it are raised. Move the pins 42, 44 on the lift arm 38 towards the ends of the slots 43, 45 in the Lifting rods 36, 37 and another upward movement the lower link causes the lift arm to raise the rotor assembly via the lift rods. The pin 39 of the Lift arm 38 is attached so that the acting on the arm, forces resulting from this further upward movement result in a counterclockwise rotation of the arm strive for (Fig. l). The counterclockwise rotation of the lifting arm 38 is stopped by the stop 39A, when the arm is almost vertical. if

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BATH ORIGINAL

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2150773

the lifting arm has assumed this position and the pins 42, 44 come to rest in the ends of the slots 43, 45, the rotor beam 22 extends substantially horizontally, provided that the central column 16 is perpendicular stands. Therefore, the rotor beam 22 raised for transport always takes the same position relative to the tractor a.

After lifting the lower link, the entire rotor assembly can be turned around the axis of the central column by hand of the A-frame 15 to the rear until the shoulder on the articulated rod 20 the locking part 50 after pushes outside, to the opening 49 in the locking part is aligned and clicks into place. The mower is now in its transport position according to FIG. 5> in which it protrudes backwards.

A second embodiment of the invention is shown in FIG. emerged. This arrangement is similar to that described above except for the following features:

A joint 52 between the rotors 2, 3 divides the rotor beam 53 in two sections pivotable about the hinge axis. In order to adapt to the pivoting movement of the rotor arrangement 2, 3 mediated by the joint the drive shaft 10 between the gear housing 6, two telescopic sections 1OA, 1OB and the gear housing are connected by a telescopic rod with two telescopic sections 54, 54A, which are movably attached to is attached to them and prevents rotation of the gear housing about the axes of the stub axles 23. The T-supports 34, 55 of the embodiment explained above Corresponding components are not available. The cover, not shown, consists of two parts that are on are attached to the respective rotor and the swivel

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BATH ORIGINAL

able to follow movement of the rotor assembly.

To raise the rotor 3, an additional lifting rod 55 is provided, which in addition to the lifting rod 36 with the in Fig. 6 lifting arm 38, not shown, is connected, for adaptation to the pivoting movement of the rotor 3 a not has longitudinal slot shown and at its other end articulately engages the gear housing 7.

This embodiment operates in the manner already described Way, but may be small because of the permitted independent vertical hovering motion of the rotors Follow the uneven ground and hills more closely.

Fig. 7 shows a four-drum mower, which is another Embodiment of the invention represents. There are two inner rotors 56, 57 which are mounted on a rotor beam 61 are stored. The rotors 56, 57 correspond in terms of their structure, their arrangement, their drive and their holder essentially the rotors 2, 3 of the embodiment of FIGS. 1 to 5 except for de Fact that the lifting rod 58 * which is the counterpart to represents the lifting rod 36 of the first embodiment, instead of the transmission housing 6 with the transmission housing 7 is movably connected. A second pair of rotors 59, 6O, which is similar to the rotors 56, 57, is located on a rotor beam 62, which is the rotor beam 6l resembles and via a hinge point 63 with its exterior End is connected. One end of a second lifting rod 64 articulately engages the bevel gear housing 65 on the rotor 6O, while the other end of the lifting arm 38 (not shown, FIG. 7) on the A-frame 15 assigned 1st.

The drive shafts 66, 67 transmit the drive -.-. U the

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Rotors 59 * 6o »being at each end of the shaft 66 leading to the Adaptation to the relative pivoting movement of the rotor assembly 57 * 59 is telescopic, universal joints 68 are provided.

The joint 6 ~} between the rotor bars 61, 62 allows the rotor arrangement to follow the contour of the ground exactly.

The advantages of the described embodiments include the improved mounting of the rotors. Hold the sturdy steering knuckles that are rigidly attached to the rotor beam the rotors at ground level and are dabs' less stressed than the rotor-arms, known from above powered mowers in which the rotor mounts come down from a frame structure above the rotors protrude.

As a result of the improved rotor mounting, they are down directed shafts 25 driving the rotors Subject to bending stresses, which is why they only need to be torsionally rigid and made of light alloys or aluminum - an essential weight-saving feature.

The geometry of the hanging rail 21, the gear housing 5 and the link rod 20 formed linkage is such that when the mower is raised for transport the entire rotor assembly pivots a short distance inward against the tractor, creating the center of gravity of the mower is shifted in the direction of the tractor and that acting on the tractor by the mower Obesity is noticeably reduced. This inward pivoting basically results from the fact that the hitch rail 21 is hinged at one end to the articulated rod 20 and at the other end to the rotor beam 22

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and extends downward at a shallow angle between them. When the mower is raised, this has result that the hitch rail 21 to the of the wants to pivot horizontal part of the joint rod 20 formed joint axis downward, i.e. clockwise as shown in FIG. Such a movement forces the rotor assembly against the tractor.

Another advantage is that the rotor bars allow height-adjustable runners in conventional Way easy to install. Such runners provide a simple means of adjusting the cutting height of the mower represent.

In a modification of the described embodiments, the rotors are driven by hydraulic motors, their driving force, for example, from a hydraulic auxiliary supply system on the tractor or can be derived from a hydraulic pump that can be driven by the tractor PTO.

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Claims (26)

Expectations Mower with a cutting element that can be rotated about an upwardly directed axis and a mounting device for connecting the mower to a tractor in such a way that the cutting element is in the working position the tractor is laterally offset, characterized by a carrier part close to the ground (22; 53; 6l, 62) on which the cutting element (2, 3; 56, 57 * 59 »60) is arranged rotatably relative to this is; by a drive connected to the cutting element and causing it to rotate, which is directed downwards from a position above the cutting element, the Attachment device (14) exerts tensile forces on the cutting element in order to only use the support part close to the ground to move through the crop to be mowed and with the carrier part to transfer the tensile forces to only one At the end of the same. 2. Mower, characterized by a support part (22; 53; 6l, 62) close to the ground, on which the cutting element (2, 3; 56, 57, 59, 60) is arranged rotatably relative to this; by a force transmission member which is drivingly connected to the cutting element and sets it in rotation, which is directed downwards from a position above the cutting element, the attachment device (14) exerting tensile forces on the cutting element so that it only passes through the crop to be mowed via the carrier part close to the ground to move and by connecting elements of the attachment device d ^} l), through which Hubkräft.fi are exerted on the force transmission member, and which with the carrier part for transmitting the lifting forces to this only through da :; Power transmission ^ urip ^^ liod connected .sLncl, where (iß 2 0 9 8? UI 0 h 8 8 BATH ORIGINAL lifting forces acting on the connecting elements only through the force transmission member to the carrier part be exercised. 3. Mower according to claim 1 or 2, characterized in that that the cutting member has a first cutting element (2; 56, 57), and that a second cutting element (3; 59 * 60) is present which is similar to the first cutting element is drivable and mounted on the carrier part. 4. Mower according to claim 3 * thereby gekenn- ™ draws that the support part has a rigid Bar (22; 53; 6l, 62) which during the Operation is essentially transverse to the normal direction of travel of the mower. 5. Mower according to claim 4, characterized in that the beam is erected with it is firmly connected steering knuckle (23), and in that the cutting elements are rotatably supported on the steering knuckles. 6. Mower according to the preceding claims, characterized in that at least a predominant proportion of the power transmission member of the or each cutting element is formed from aluminum, the strength of which is below that of steel. 7. Mower according to claims 1 to 5j, characterized in that at least a predominant portion of the force transmission member of the or each cutting element consists of aluminum. 209828/0588 8. Mower according to the preceding claims with drive transmission means, characterized in that the or each cutting element is rotatable by means of the power take-off shaft of a tractor (4), that the drive transmission means a gear box (6, 7 J- 65) arranged above the or each power transmission member and a drive shaft (9, 10; 66, 6j) which can be connected to the transmission housing, and in that the power transmission member and the drive shaft are inclined approximately at right angles relative to one another. 9. Mower according to claim 8 as a function of claim 2, characterized in that the connecting elements are provided on the or one of the transmission housings. 10. Mower according to claim 8 or 9 »characterized in that the drive transmission means have a further gear housing with an output connection, which is connected to the drive shaft is connectable, and that a drive connection is provided, which via a further shaft with the PTO of the tractor is connectable. 11. Mower according to claim 10, characterized in that the further gear housing is arranged so that, during operation, the axis of rotation of its drive connection is essentially aligned with the axis of rotation of the tractor PTO, and that the angle between the axes of rotation of the drive and output connections furthermore Gotrir ^j bf> kaf5terE is about a right angle. - 16 ? 0 9 8? i · ¹ / (J 5 H B SAD ORJQjM.ii 12. Mower according to the preceding claims, characterized in that the Hitching device (14) has a pulling part (21) which has internal connections through which it is connected to one end can be mounted on the power lift links (11, 12) of the tractor in a predetermined position relative to these, and that the pulling part on its other End carries external connections that transmit the tensile forces to the carrier part. 13. Mower according to claim 12, characterized in that the inner connections of the W pulling part (21) permit a limited angular movement of the outer end about an essentially horizontal, forwardly directed axis in the area of the inner end of the pulling part. 14. Mower according to claim I3, characterized that the internal connections have a rearwardly directed pin portion the tensile forces are transmitted to the inner end of the traction part, and that a tension link is provided, its front end with the power lift links (11, 12) of the tractor (4) and its rear end with the pulling part (21) can be connected between its ends. 15 · Mower according to claim 14, characterized in that the pull link is a pull-limiting Has device that during operation, the mower relative to the tractor to the rear swivels when the pulling force exerted on the mower exceeds a predetermined value * 16. Mower with the features of claims 10 or 11 2 0 9 8 7 H / 0 5 8 8 BATH ORIGINAL in connection with those of claim 13, characterized in that the attachment device (14) has a frame (15), which can be mounted on the power lift links (11, 12) of the tractor, that a substantially L-shaped Part (20) is provided, one of the upright legs of which is pivotably mounted in the frame, so that the other leg can be rotated from a rearward-facing position into a transverse position, that the further housing box (5) is rigidly attached to the inner end of the pulling part (21) and to the other Leg of the L-shaped part (20) is mounted angularly movable about its axis, and that the attachment device (14) also has a tension link, the front end of which is attached to the power lift link (11, 12) of the tractor and its rear end are articulated to the pulling part between its ends. 17 · Mower according to claims 12 to 16, characterized gekennze ichnet that the outer connections of the pulling part (21) have a joint arrangement (21A), through which the carrier part relative to the tension part by one in operation forwards and substantially horizontally directed joint axis is pivotable. 18. Mower according to the preceding claims, characterized in that harvest and second rods (30, 37) are present, the lifting forces able to exercise on the cutting members, and with their inner end to one on the power lift links (11, 12) of the tractor attachable! {Ahmen (15) are articulated, and that the first lifting rod (36) with its outer end articulated to the or the downwardly directed power transmission links attacks while the second lifting rod (37) with BATH its outer end is articulated to the inner end of the carrier part close to the ground. 19. Mower according to claim 18, characterized in that the inner end of each lifting rod articulated on a lifting arm (38) which is pivotably mounted on the frame (I5). 20. Mähwerk- according to claim I9, characterized shows that the lifting arm (38) at a point offset from the center point between the articulated connections (42, 44) of the first and second lifting rods * (36, 37) is articulated on the frame (15). 21. Mower according to claim 20, characterized in that a stop (39A) is provided is that the angular movement of the lifting arm (38) is relative limited to the frame (15), and that the design of the lifting rods (36, 37) a limited lost movement allows the lifting rods relative to the lifting arm, so that when lifting the frame on the tractor linkage (11, 12) the carrier part close to the ground into a predetermined position is raised relative to the frame k 22. Mower according to claim 4 or of this claim dependent claims, characterized in that the beam between the first and second cutting elements is articulated, that beam sections the first and second cutting elements wear and can perform angular movements relative to each other about an axis that essentially follow is directed forward and runs horizontally, and that support means are provided, the downward pivoting of the outer beam section with the inner one raised Limit the bar section. 209828/0588 BATH ORIGINAL 23. Mower according to claim 22, characterized that the support means comprise a non-extendable rod, which over idle means at its inner end can be connected to the power lift links of the tractor and at its outer end in communication with the downwardly directed transmission link of the cutting element on the outer beam part stands. 24. Mower according to claims 22 and 2 ^, characterized by a telescopic drive shaft (1OA, 10B) that supports the gear housing (6, 7) connects across the first and second cutting elements to provide drive between them. 25. Mower according to the preceding claims, characterized in that the Cutting organs have shell-shaped parts (2 ^ A), knife blades (24) are attached to their outer circumference. 26. Mower according to the preceding claims, characterized in that the The carrier part close to the ground has height-adjustable floor runners (45, 45A) which allow the cutting height adjustment of the mower. 2098? 0/0588 L t e eersei