DE1161069B - Mulcher - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN 4 $ ii7 ¥ W PATENTAMT Internat. Kl .: A Ol d

EDITORIAL

German class: 45 c-35/26

Number: 1161069

File number: R 30421III / 45 c

Filing date: May 27, 1961

Opening day: January 9, 1964

The invention relates to a mulching device which is equipped with a drive motor, preferably an internal combustion engine, and a mower knife, the cutting edges of which run in a plane parallel to the ground surface, is equipped. The invention aims to create a mulching device that is simple and weight-wise is easily constructed so that it can only be pushed by one person with little effort and can be controlled. The mulching device according to the invention should also set up and be designed that it can be used both in unfavorable soil conditions, e.g. B. plowed up or lumpy Used on the ground or in inclined positions as well as on level ground without considerable effort can be. In particular, the mulching device according to the invention should be suitable for use in terrain be, which is planted with individual crops, for example bush fruit crops, so that when mulching a constant driving around these individual crops is required. This driving around individual plants or that Driving under branches in pure cultures, for example, requires extraordinary maneuverability of the mobile mulcher, so that you can without considerable effort, and without the operator constantly has to run in a curve, the parts of the mulching device with the smallest possible radius around the individual Plants such as vines, trees, etc. can drive around.

The desired versatility and easy mobility with structurally simple and weight-wise easier training of the mulcher is achieved according to the invention by placing the impeller on the frame of the mulching device is arranged so that it can be changed over, depending on the terrain and soil conditions can be fastened either in front of or behind the mowing motor unit in the direction of travel.

The frame advantageously consists of a simple one located approximately above the mowing motor unit extending, preferably tubular spar, its in the area above the mower-motor unit lying part is bent downwards and at the end an almost horizontally lying part of the spar carries as a connection part, attached to one of the rear end in the direction of travel, the mower-motor unit and the front end of which is adapted to detachably receive the fork of the impeller.

In the front arrangement of the impeller, in which this is in the approximately horizontal When the handlebar part is detachably inserted, the mulching device is particularly suitable for use in unfavorable conditions Ground conditions, for example on lumpy, very uneven ground or on slopes.

Mulcher

Applicant:

Reitter & Schefenacker,

Esslingen / Neckar, Kreuzstrasse 55-59

Named as inventor:
Hans-Peter Vellenzer,
Esslingen / Neckar-Obereßlingen

If the mulcher is to be used on level ground without any significant inclines, the additional is overgrown with individual crops, so that a constant change in the direction of travel when working with the Mulching device is required, according to a further feature of the invention in the area of a pivot point at the rear end of the spar an approximately perpendicular to this support piece for the Connection of the impeller with fork and a clamping means are arranged.

In the area of this second bearing point for the impeller, according to a further feature of the invention at the rear end of the preferably tubular scorn a vertically pivotable, with a Handlebar provided, preferably telescopically extendable spar part articulated and by a locking means be lockable in every extended position. At the free end of the spar part is again the steering fork arranged with handles for the operator of the mulching device.

The connection between the actual frame spar and the height-adjustable telescopic spar part provided with a handle advantageous so that the height-adjustable spar part with a rotatable about a horizontal bolt Fork attached to the front part and can be folded into a transport position by about 180 °.

According to a further feature of the invention is

the mowing motor unit on the lower connection part of the bar around an axis in the direction of travel Suspended pendulum, secured against longitudinal displacement by a locking bolt and by its own Feeler wheels supported against the ground in such a way that when the impeller is placed at an angle, the mowing motor unit executes a lateral translational movement parallel to the floor surface.

Thus, if the mulching device according to the invention is used on slopes or in uneven ground,

309 778/53

or if the frame including the wheel is tilted, caused by tilting the handlebars by the operator, in order to bypass individual crops or to avoid obstacles is required, the actual mower-motor unit retains its horizontal position as a result of the rotatable suspension with respect to the frame of the mulcher in an advantageous manner. Around to achieve this desired translational movement with a desired inclined position of the mulching frame, the spar of the frame and the pin of the impeller are connected to each other in such a way that at Tilting the handlebars in an inclined position the wheel assumes a corresponding inclined position, whereby it maintains its contact with the ground, while as a result of the pendulous suspension of the mower-motor unit this compared to the impeller a corresponding lateral displacement movement from the originally horizontal Executes position in the new desired incline.

In the case of the mulching device according to the invention, the control movement therefore takes place when driving around obstacles Od. The like. By pivoting the handlebar by hand instead, the handlebars about the longitudinal axis of the Mulchgerätes is tilted, and furthermore the support point of the rear or front Impeller remains unchanged from the ground. During this tilting movement, the vehicle-mounted ones lead Parts, such as the mower-motor unit including the accessories attached to it, a lateral shifting movement according to the inclination of the handlebar and wheel. This shifting movement is opposed by the dead weight of these parts as a result of the oscillating arrangement achieved the frame, these parts remain in their horizontal position, so that a change in the Cutting height as a result of the control movement when driving around individual plants or similar obstacles is not to be feared.

To cancel this rotational mobility of the mowing motor unit is opposite to the lower connector of the spar arranged a locking device through which the connecting part rigidly with the Mäh-Moioraggregat is connected. This coupling will be required when the mulcher to be used on flat terrain without obstacles and thereby on three wheels to achieve the same cutting height as possible is driven. For this purpose are behind the mowing motor unit small running wheels or similar lane-keeping devices on a carrier lying transversely to the longitudinal axis of the mulcher pendulous or rigidly suspended.

The object of the invention is shown in the drawings using an exemplary embodiment.

F i g. 1 shows the mulcher in side view, wherein the impeller is arranged at the front;

Fig. La shows this device in a view from the front;

F i g. Figure 2 is a side view of the mulcher with the impeller behind the mower motor unit;

F i g. 2a is a view of the device of FIG. 2 from the front;

Fig. 3 simulates a top view of the device Fig. 2, the front possible arrangement of the impeller is shown in dashed lines.

The mowing drive unit of the mulching device consists of a motor 3 and a mowing device 4 lying coaxially thereto, which in the exemplary embodiment represents a known flat knife 4b. This flat knife 4 b can be rotated about the vertical axis 4 c, which coincides with the axis 3 ″ of the motor unit. Motor 3 and 4 mowing apparatus form a structural unit so that a low center of gravity is achieved: on the engine 3, the usual components, such as fan 10, the fuel tank 9, and exhaust muffler 11 α 11 are disposed.

The mowing knife 4 b is covered by a preferably conical housing 4 ″, which is in his

ίο the rear area is pulled down below the cutting plane of the mower blade 4 b .

The mowing motor unit 4, 3 is arranged on a preferably horizontal bar part 8. In order to avoid a corresponding inclination or inclination of the mowing motor unit when the handlebar part 8 is rotated or when the frame is inclined into an inclined position, according to a feature of the invention, the suspension of the mower motor unit 4, 3 on the handlebar 8 is pendulum or such a rotational movement-Hch that the mowing motor unit 4, 3 retains its horizontal position even when the spar part 8 is rotated or inclined. This is particularly necessary when mulching on level ground, since the desired working position of the mowing tool 4 b , parallel to the ground, is maintained with appropriate evasive movements due to the inclined position of the frame.

At the horizontally disposed bar member 8, the end of the Sb is welded c downward curving Holmes 5 of the frame Holmes. 5 The frame spar 5 thus goes in a curved arc over the motor unit 3; it has at its free end located behind the mowing motor unit 4, 3 a preferably vertically arranged connection part in the form of a support piece 12. The rear spar 5e is continuously height adjustable with a fork 15 around the horizontal axis designed as a locking pin 16, so that the Operator can set a desired height of the handles 5 a . As a result of the telescopic design of the spar part 5e , any desired spar length can also be continuously adjusted and fixed by means of special fastening parts 5g.
If the mulcher is used on unfavorable, especially uneven, bumpy or clumpy ground, where considerable unevenness and driving resistance have to be overcome, the wheel 1, which is designed as a spoked wheel with pneumatic tires in the fork 2, can be rotated around the axis to save weight 1 α is mounted, arranged at the front of the spar part 8 by means of the pin 2 a . The handle 2 b, which penetrates the tubular spar part 8 and the corresponding transverse recess in the socket pin 2 a , is used for fastening.

For the use of the mulcher on level ground, where, however, a strong maneuverability must be given, taking into account any obstacles. the impeller 1 with a yoke 2 and a socket pin 2 is inserted behind the mowing motor unit 4 3 in the support piece 12 and with the same part 2 ft locked (see. Fig. 2, 2a and 3). In the rear arrangement of the wheel 1, a counterweight 17 can be provided on the handlebar 13 if necessary.

For the purpose of adjusting the height of the mowing motor unit relative to the axis of rotation 1 α of the impeller 1 (see FIG. 1), a second receiving bore 18 for the axis of rotation la is provided on the fork 2. At the rear

Ren end of the mower housing 4 α is advantageously on a transverse to the longitudinal axis AA (see. Fig. 3) of the mulcher a bearing rod 23 or. The pendulum levers 20 can be attached to the pivot pin 19 at two different heights, with a cross pin 22 or the like being provided to limit the height. The mulcher rests on level ground where there are no obstacles to avoid, advantageously on the running wheel 1 and the two lateral support wheels 21, so that the most uniform possible cutting height above the level surface is achieved. By repositioning the axis of rotation la of the impeller in the recess 18 of the fork 2 and by correspondingly repositioning the pendulum link 20 in the lower part of the vertical bolt 19, a higher position of the cutting blade 4 b relative to the ground can be achieved. For the transport position, the telescopically extendable spar part 5e is plugged together and pivoted into a position above the mulching device, as indicated by the dashed line T in FIGS.

The stepless bar length adjustment is shown in FIG. 3 illustrated with dash-dotted lines.

In the F i g. 1 a, 2 a in connection with F i g. 3 is shown by dash-dotted lines that when the impeller 1 is arranged behind the mowing motor unit 4, 3, a significantly greater lateral offset of the mowing motor unit 4, 3 is achieved due to the corresponding inclination of the handlebar 13 than when the wheel 1 is arranged in front of the mower -Motor unit according to FIG. 1. If the impeller 1 is arranged at the front, then unevenness in the floor can be overcome more easily; at the same time, any obstacles for the mowing-motor unit can be relatively easily left out by lifting the mowing-motor unit upwards by lifting the bars. If there are any obstacles at the side, as FIG. La shows, a tilting movement of the handlebar 13 by the operator is required, so that the point 13 α arrives at the dot-dashed new position 13 a '. Here, the impeller 1 is converted into the inclined position, likewise dash-dotted, by the angle β. During this movement, when the wheel 1 is in front, a lateral offset of the mower-motor unit 4, 3 occurs, which is shown in FIG. 1 a is drawn in dash-dotted lines and corresponds to the dimension χ. With the impeller 1 arranged behind the mowing-motor unit 4, 3 according to FIG. 2a, only a twisting _{of the handlebar according to arrow F 1 is} necessary, during which the handlebar 13 reaches the inclined position II-II shown in dash-dotted lines. The impeller 1 also inclines at an angle β. The inclined position of the impeller is indicated by dash-dotted lines S'-S ' in FIG. 2 a is drawn. The lateral offset due to the rotation of the spar with the wheel arranged at the rear is greater for the mowing motor unit than with the front wheel and corresponds to the length of the arc piece marked with the angle α (see. Fig. 3), while the lateral offset with the leading wheel is the same Inclination of the wheel by the angle β only corresponds to the distance χ (see. Fig. 3). The greater displacement of the mowing motor unit is also clearly evident from FIG. 2a, in which the normal position L is marked and the new laterally offset position is shown in dash-dotted lines when the spar is rotated and the impeller is inclined by angle β with L _1. In Fig. 3, the new position of the mower blade housing with inclination of the impeller 1 to the right by the angle α is illustrated by dash-dotted lines in plan view. To clarify the difference, the lateral offset with the leading wheel to the other side is drawn and denoted by the distance χ. The corresponding position of the mower blade housing 4 α is also shown in phantom in FIG. 3.

To cancel the rotational mobility of the mowing motor unit 4, 3 with respect to the frame spar part 8 a locking device 14 is arranged, which consists of a simple spring-loaded lever, which opens into a corresponding recess in the motor unit, and so the horn part 8 on which the lever 14 is fastened in tabs, rigidly connects to the engine. This rigid connection by means of a bolt 14 is necessary when, for example, with the device on level ground that does not have any Has obstacles, is mulched, since then the device is as unchanged as possible from the ground Should take position. Furthermore, this location may be desirable when working on slopes, so that the cutting tool assumes a corresponding inclined position when the floor is inclined.

Claims (11)

Patent claims: 1. Mulcher, which is provided with an impeller, a motor and a rotary mower whose knife revolves in a plane parallel to the ground surface, characterized in that, that the impeller (1) on the frame of this mulching device is arranged in such a way that it can be reversed is that, depending on the terrain and ground conditions, it is optionally in the direction of travel (F) or can be fastened behind the mowing motor unit (4, 3). 2. Mulching device according to claim 1, characterized in that the frame consists of a spar (5) extending approximately above the mowing motor unit (4, 3), the part of which is located in the area above the mowing motor unit (4, 3) ( 5 c) is bent down and at the end (5 b) carries an approximately horizontal spar part (8) as a connection part, at one end of which the mowing motor unit (4, 3) is attached and its front end is set up for releasably receiving the impeller fork (2). 3. Mulching device according to claim 1 or 2, characterized in that in the area of an articulation point (5 /) at the rear end of the spar (5) an approximately perpendicular to this support piece (12) for connecting the impeller (1) with fork ( 2) and a clamping means (2 b) is arranged. 4. Mulching device according to one of the preceding claims, characterized in that at the rear end of the preferably tubular spar (5) a vertically pivotable, with a handlebar (13) provided, preferably telescopically extendable Hoknteil (Se) is articulated and by a locking means (Sg) in can be determined in every extended position. 5. Mulching device according to one of the preceding claims, characterized in that the Height-adjustable horn part (Se) with a fork piece (15) rotatable about a horizontal bolt (16) is attached to the front horn part (5) and can be folded back into a transport position by about 180 ^c . 6. Mulching device according to one of the preceding claims, characterized in that the Mowing motor unit on the lower connection part (8) of the handlebar around one lying in the direction of travel Axis pendulum suspended, secured against longitudinal displacement by a locking bolt and is supported by its own jockey wheels (21) relative to the ground, so that in inclined positions of the impeller (1), the mowing motor unit has a lateral translational movement parallel to the ground surface executes. 7. Mulching device according to claim 6, characterized in that to cancel the rotational mobility of the mowing motor unit (4, 3) opposite the lower connection part (8) of the handle a locking device (14) is arranged through which the connecting part (8) is rigidly connected to the mower-motor unit (4, 3) is connected. 8. Mulching device according to claim 6 or 7, characterized in that the handlebars (13) and the wheel fork (2) are connected to one another in such a way that when the handlebars (13) are tilted into an inclined position (II-II in Fi g. 2a ) the impeller (2 ) assumes a corresponding inclined position (SS ' in FIG. 2 a). 9. Mulching device according to one of the preceding claims, characterized in that the feeler wheels (21) designed as self-adjusting trailing wheels and in the rear area of the mower-motor unit (4, 3) are arranged. 10. Mulching device according to one of the preceding claims, characterized in that the feeler wheels (21) with pendulum link core (20) arranged to be adjustable in height on their vertical pivot axes (19) are. 11. Mulching device according to one of the preceding claims, characterized in that for cutting height adjustment the fork (2) of the impeller (1) has at least two superimposed bores for receiving the wheel axle (1 ei) . For this purpose 2 sheets of drawings 309 778/53 12.63 © Bundesdruckcra Berlin