DE1966495A1 - TRACTOR - Google Patents

Description

Patent attorney

DipWng. Walter JaeklscK * λ λ 1 1

2.Stuttgart N. Menzelstraße4Q #VUW *

Yl. OKI. 1972 1966495

"Tractor"

The invention relates to a tractor, "or a self-propelled agricultural tractor designed as a tractor Vehicle with a chassis on which devices such as work machines, loading boxes or the like can be saddled are and with a rear mounted power lift.

Known tugs of this type (Fr-PS 989.301) to the are to be arranged by means of the power lift smaller devices, can be made by the manufacturer with various relatively large Devices to be put on are assembled, but with a The tractor is only available in combination with a specific work machine or loading box, so that the user only has one combination available and therefore for different ones Purposes several combinations are required. This results in relatively large investments. Every combination shows but a chassis, engine, change gearbox, driver's seat, operating elements, etc. ■

309810/0239

The invention has for its object to provide a tugboat with several kinds machines and loading boxes can be combined so that a set of clean ^and: allow devices is relatively cheaper present, the rapidly ver ~ mountable "be changed to a tractor ^'~.!

According to the invention are on the longitudinal sides of the chassis Couplings for receiving connections from above arranged devices to be placed on. "

In this way, a tractor can be combined with several types of devices and at the same time can be used as a pure tractor without a device. ^; '

The invention is explained in more detail with reference to the accompanying drawing "; explained, with a number of advantages and other features of the Invention are highlighted. Show it:

Figures 1 and 2 are a side view and a top view, respectively a tractor according to the invention,

Fig. 3 shows a combination of a tractor and a Machine, '

4 shows a combination of a tractor and one Combine harvester,

Fig. 5 is a side view of a tractor according to the Invention,

Fig. 6 is a side view of a tractor on which a loading area is arranged,

Fig. 7 is a side view of a tractor with a ' Harvester,

8 shows the side view of a tractor with a loading area and a machine arranged at the front of the tractor,

Fig. 9 is a side view of an embodiment of a Tractor according to the invention,

10 shows the top view of the tractor according to FIG. 9 "" ■ FIG. 11 shows the side view of the combination of a tractor, a loading space and a maize chopper,

= Fig. 12 the * construction of a support device for a loading platform or machine to be attached to the tractor,

13 shows the side view of a combinabion of a Tractor and a loading device.

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The tug 1 shown in den-Jig · 1 and 2 has a Frame 4 supported by axes 2 and 3, which may be a self-supporting frame. On axes 2 and J are with Wheels 5 »5A fitted with tractor tires are arranged, all of them are of the same size and can be driven. The steering of the tractor 1 comprises the front handlebars 6 and the rear steering · " rods 7. The tractor has a two-point lifting device at the front 8 with pivotable about a horizontal axis Support arms 9 and 10. The tractor 1 is provided with a three-point lifting device 11 at the rear. The frame of the The tractor 1 has a support beam 12 on which an arm 13 is articulated, which in turn is articulated with a Cab 14- is connected. The arm 13 is in this preferred embodiment designed as a hollow beam which is coupled to the supporting beam 12 by means of a vertical hinge axis 15 is. Through the hollow arm 13 lines, cables and the like are. (which are also not shown) out. About the cables and Lines are the steering device, braking device, etc. the constitute the controls of the tractor with the tractor tied together. On the other side 16 of the support arm 13 is the Arranged driver's seat, which is rotatable about a vertical Axis 17. The driver's seat 18 and the steering device 19 are arranged in the closed cab 14-. This cab has in a favorable embodiment a rectangular roof 20 which is one and a half to twice as large than the floor area 21 of the cab. The windows 21A of the cab 14- are wider on their upper side than on their lower side. The driver's cab is equipped with air conditioning and a radio and radio system.

According to the invention, the driver's cab 14 can be rotated open the arm 13 and at the same time pivotable, arranged around the hinge axis 15, so that, as shown in the top view in Fig. 2, the cab is adjustable in at least two positions, the position of the cab shown in solid lines is located above the tractor, while it is in the position shown in dashed lines on the front of the tractor is located. The support beam 12 includes locking

309810/0239

devices 22 and 22A to fix the cab in the two positions shown (see FIG. 2).

The tractor according to the invention is further characterized by a lifting device working in the vertical direction, which essentially consists of four "adjusting cylinders 23" consists. There are two adjustment cylinders near the front axle and two cylinders near the rear axle of the tractor arranged. According to FIG. 2, there are two adjusting cylinders j'e on both sides of the frame 4 - approximately at the height of the fastening bar 12 · The adjusting cylinders. 23 are hydraulically actuated from the driver's seat in a manner not shown and form a quick coupling for coupling the loading area or machine.

In a favorable embodiment are in the vicinity of the Top of the adjusting cylinder 23 locking devices attached, which represent a ceil of coupling means for a loading area or a machine. These locking devices consist of fastening strips 24- with openings 25 for receiving a locking pin are provided.

A drive device is located between axles 2 and 3 26 of the tractor arranged, in this embodiment the engine transversely with respect to the direction of travel A of the tractor is arranged.

The arm 13 consists of two parts 13A and 13B (see Fig. 2). The part 13A of the arm is made curved while the second part 13B is straight. The joints are advantageous 15 and 17 of the support arm 13 lower than the upper side of the Tug arranged. This results in a lower one Center of gravity and design of the tractor including the driver's position. Due to the special design of the support arm 13 the driver's cab 14- can comfortably face the left front of the Tractor-be pivoted so that the part 13A of the support arm is around the wheel 5 of the tractor. It is favorable further that the cab is firm, but somewhat resilient close to the tractor frame when it is locked. For this purpose, a spring device is in the locking device 22

309810/0239 _; ;

Device 22 arranged a le dervorr ichtung with low suspension.

The arm 13 consists of two parts. Preferably, the driver's cab 14 is resiliently connected to the frame of the tractor 1 in a manner not shown in full, so that,. can give way in the vertical direction ¹ resiliently.

At the front is the tractor with an additional Support member 32 is provided on which a part of an above the tractor arranged machine or loading area can be supported. At the rear of the tractor is the lifting device 11 a beam 33 attached to its ends is provided with taillights 34 and 35 ". Next is at the rear At the end of the frame of the tractor a hitch 36 for pulling Arranged by car and the like.

The gear 26 is from the one on the other side in Tractor-arranged engine is driven and drives the differential gears 38 cter rear axle via the cardan shafts 37 and 39 and front axle of the tractor. The transversely arranged Motor with gear allows a low arrangement of the Driver's seat and a low center of gravity. The low center of gravity and the large wheelbase make that the tractor can be used very well on slopes and under difficult circumstances. The driver's position in the middle of the tractor has the advantage that machines arranged at the front of the tractor, such as a mower or a seed drill, work very well can be observed. Are from the middle of the tractor However, if necessary, also those arranged at the rear of the tractor Observe machines or tools closely.

In the position of the driver's position shown in Fig. 1, the tractor is intended to push or pull machines or tools. These machines or tools can be arranged on the lifting devices arranged at the front or rear of the tractor, or they can be pulled by means of the tractor's hitch. The tractor can, however, also be used in that the driver's position is arranged in the position shown in FIG. 2 with a dashed line. In case .diesem machine or a loading area can be arranged by means of adjustment cylinder 23 above the tractor, which hereinafter at some other _t

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Ausfü ^ irungsbeispielen will be explained in more detail.

The tractor according to the invention has the advantage that large machines can be driven by the tractor in a very favorable manner and form a unit with the tractor. Through this the maneuverability is increased. The driver can continue to observe the work of the machines. The driver's seat can be arranged in the immediate vicinity of the working tools. If e.g. a combine harvester as a unit above the tractor is arranged, the driver's seat can be located in the vicinity of the cutting table of the combine harvester.

Although the driver's seat is in the symmetry surface BB

the tractor can be arranged, it is favorable to this

a-symmetrical on the right side of the in the direction of travel To be attached to the tractor. In the pivoted, with dashed lines The position shown is the driver's position at the front of the tractor Machines closer so that he can observe them well.

Furthermore, it is particularly advantageous to arrange a loading area on the tractor according to the invention. This has the advantage that the weight of the load rests directly on the tractor wheels. If the driver's seat, as shown in Fig. Λ and 2, has a width that is significantly smaller than the total width of the vehicle including the loading area, machines can be arranged directly on the front side of the loading area to bring the material onto the loading area. The machines can be arranged directly in front of the front tractor wheels and thus have better ground contour following. This also makes it easier to maneuver the unit of tractor, loading area and machines and the ground pressure on the front tractor wheels is lower than when the machines are arranged further forward. In particular, when the tractor with all-wheel-Antrieh and all-wheel steering is provided a device which can be handled in the most difficult circumstances created by this unit of cargo space _$ loaders and tractors. It is particularly advantageous that the loading area and any machinery can be easily removed from the tractor according to the invention, and that the tractor without the weight has a small space, as a pure tractor, for working on the ground.

3-Q98tO / Q23ft

; ^"7 -" 196649S

processing purposes, e.g. for mowing or sowing. By the adjustable arrangement of the driver's position can be both Machines that are arranged at the front of the tractor, as well as ma- ' machines that are arranged at the rear of the tractor are conveniently positioned - respected and monitored.

The frame 40 of the second example shown in FIG. 3 a tractor according to the invention carries an engine compartment 41 at the rear end and can consist of a hollow beam The frame is supported by six wheels, from which the two middle running wheels 42 and the running wheels 43 are connected to the frame so that they can be moved in height. Advantageous the wheel groups 44 and 43 can be controlled and / or driven. It is also possible to drive the group of wheels 42.

Driving the wheels 43 is a horizontal bar across the Direction of travel in the same plane as the top of the frame 1 arranged in such a way that both ends of the The frame protrudes. At the free ends of this beam, supports 45 extending vertically upwards are attached. Vicinity the upper ends of the supports 45 are two superimposed Hinges 46 arranged horizontally and perpendicular to the Run the length of the tractor ^ on the hinges 46 arms 47 extending parallel to one another are rotatable forwards arranged. The front ends of the arms 47 are by means of the Hinges 46 parallel hinges 48 pivotable with a Carrier 49 coupled. On the carrier 49 is a vertical one Axis rotatable, lockable in several positions, closed cab 50 is arranged, which controls the tractor contains. It is clear that in this figure and in the other figures shown driver's cab without walls as a driver's platform can be used. The hinges 46 and 48 are at the corner points of a parallelogram, the arms 47 do not lie in the same vertical plane, so that. The cab can be swiveled over a large swivel range from bottom to top and from front to back. The arms 47 in relation to the tractor frame, e.g. by means of a not illustrated hydraulic adjusting cylinder pivotable, the can be operated from the driver's seat. - -.- ■ ·

309810 / Q238,

At both ends of the tractor there are projections 5Ή <& e ^m ^ lying one above the other. V-shaped recesses 52 are provided. Hooks 53 are pivotably arranged near the projections on the frame. Two superposed hooks 53 are connected to one another by a coupling rod 5 ^ The top of each pair of superposed hooks 53 is coupled to a hydraulic adjusting cylinder 55, by means of which the hooks can be pivoted about the hinges 56. Machines to be used together with the tractor are preferably provided with bolts which are pushed into the recesses 52 and through the hooks 53 can be locked. The hooks 53 are preferably conveniently detachable and interchangeable with differently designed lifting arms, with which machines can be coupled to a tractor in the usual way.

Furthermore, one or more power take-off shafts, which are not shown in the figure and which can preferably be driven at different speeds, are arranged at both ends of the tractor. In order to enable the machines to be quickly and firmly coupled, claw clutches are preferably attached to these power take-off shafts, which can interact with parts of claw couplings that are provided on the machines to be freely coupled, so that the machines can thereby be driven.

Next, four vertical hydraulic adjustment cylinders 57 are attached to the tractor, the piston rods of which are pushed out Position beyond the frame of the tractor. The vertical cylinders are near the side edges of the rack. Two cylinders are close to the engine compartment 41 and two cylinders are arranged at the front end of the tractor. "

Favorable dimensions of the wheels supporting the tractor are about 1 m to 1.50 m in diameter and 30 to 50 cm Width of a wheel. In this way it can, if proportionately heavy machinery is coupled to the tractor, a relatively low ground pressure can be achieved. The engine output is preferably between 100 and 200 hp. The width of the tractor is preferably 180 to 250 cm,

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that stable support: is achieved when broad tools to be coupled

The tractor is operated from the driver's cab 50 ' feasible. The 'lines and cables required for control can be passed through the preferential hollow arms 4-7 but it is also possible between the carrier 4-9 and to attach separate cables or lines to the frame »the both with the supports 4 * 5 and with the frame 4-1 are pivotably coupled in such a way that they rotate or pivot do not hinder the cab »;

The drive mechanism is preferably designed in such a way that the tractor can be moved in two directions at the same speed Overview may have in the company hr trichtung and the coupled to the frame tools. ·

The machine 58 shown in the figure is above of the tractor and is on the tractor Coupling means executed, Yersteilzylindern 57 can be coupled »

If the machine is to be removed from the tractor, the tractor is driven under a portal 59. Fm a to secure the correct position of the tractor in relation to the portal, guides 60 are provided for the trailing wheels «The Machine 58 is then lifted by means of hydraulic cylinders 57, and in the raised position the attached to the portal, Hook 61 around pins 62 attached to the tool. After the piston rods of the cylinders 57 are retracted the tractor can be driven away under the machine - then can the cab 50 in the height direction and in the direction of travel can be adjusted and the tractor can be used as a tractor vehicle without any machines arranged above.

The tractor shown in Fig. 4 corresponds to by and large the tractor according to the previous embodiment «Corresponding individual characters have the same reference numbers. At, one end and on one side of the tug is however one around a vertical lying next to the frame 4-1 in plan view

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BATH

Axis rotatable arm 63 arranged on the tractor. At the other end of the arm 63, a cab 50 is arranged, which with respect to the arm can also be rotated about a vertical axis and in several ways Locations can be determined j.

On the tractor about horizontal axes 64 pivotable arms 65 are attached to the cylinder by hydraulic adjustment _$ 66 can be pivoted. At the ends of the arms 65 hooks 67 are pivotably arranged. In this figure, the tractor is shown in combination with a machine ₉ which is formed by a combine harvester 68. The mowing mechanism 69t ^e ^ ⁿ reel 70 and a feed screw 71 of the combine harvester are arranged at the front of the tractor. Provided behind the screw conveyor 7 ^ i ^s "fc a groove 72 in which a conveyor belt is arranged 73rd The groove 72 extends over the entire length of the tractor between the wheels 44 _t 42 and 43 and under the frame 41 and is by means of hooks 67 attached to the tractor. The conveyor belt 73 connects to the underside of a part 74 of the machine which is arranged on the rear side of the tractor and in which the threshing mechanism is housed Machine part 7 ² ^ housed conveyor 75 brought up and fed to a threshing drum 76. From the threshing drum 76 the harvested material arrives at a sieving and cleaning machine known per se is, In this way, the tractor can directly support the storage container 79, so that disser under Beib keeping a low center of gravity can contain a large amount of grain «

Preferably the vorstsfc-dna described are tugs provided with several coupling points for coupling machines, e.g. ffl ^ t the arms 53 or the hooks 67, which can be pivoted through the Adjusting cylinder 66 coupled to the frame can be actuated can.

Because the top of the wheels is almost at the same height lie like the top of the tug and each had about the same diameter, this tug is suitable for

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BAO ORIGINAL

Particularly good for coupling a loading area or a machine that is at least partially above the tractor extends. The adjustable driver's seat can be swiveled into a favorable position and locked.

The tractor according to Fig. 5 has on both sides of the Only one arm 80 of the tractor to support the cabin or the driver's position 14.

The frame of the tractor shown in Fig. 5 is essentially formed by the support frame 81. At this The tractor design is a relatively heavy drive motor 82 with an output between 200 and 300 HP arranged at the front of the tractor.

The frame is made up of two groups of two wheels 83 and 84 trimmed, which are all steerable and drivable.

At the corner points of the support frame 81 are in this embodiment hydraulically operated jack screws or jacks 85 attached, by means of which one or more on the Tractors provided loading areas or attachable machines that can be moved in height.

It is operated from the pivotable driver's cab 14. In this embodiment, the transverse axis 86 is arranged approximately in the middle of the support frame 81, while a transverse axis or carrier 87 βά the underside of the driver's cab 14 is attached. The two axes or supports 86 and 87 protrude over almost a third of their length on both sides of the support frame 81. At the ends of these crossbars or axles 86 and 87, chain housings 80 are pivotably arranged, the dimensions and thickness of which are such that the driver's cab can easily be shifted with the driver from the front of the tractor parallel to itself to the rear and vice versa. On the front and back of the support frame 81, support members 88 are provided which essentially serve as support and limiting means for the chain housings 80 and 80A.

According to Fig. 6, a cargo space is above the tractor 107 arranged by means of a support frame 108, 109 ;. This ' Support frame is in suitable places with fasteners

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BATH

or tabs 110 which can be coupled to the tractor by locking pins 111. In this embodiment, the coupling device 112 is provided with trough-shaped fastening means 113, which grip over the ends of the rods of the hydraulic cylinders 85, so that the loading space can be conveniently coupled to the tractor. Through the inclined walls of the fastening means 113, the ends of the cylindrical rods seek the centers of the fastening means so that they are centered here and the tractor gets its correct position with respect to the machine and the two can easily be locked together. The tractor frame further includes a structure 114 which includes a pivotable hydraulic telescopic cylinder 115 connected to a beam 116. This bar forms part of the support frame 108, 109 with the transverse bar 117, 118. In order to guide the loading space 107 into the tilted position, oil is fed to the cylinder 115, which is also done from the adjustable driver's seat 14. As a result, the loading space is moved into the position shown in broken lines in FIG. 7 by rotating about an axis 119 running transversely to the longitudinal axis of the tractor. The support arms 120 and 121 are pivotably attached to the frame or to the driver's cab 14, the hinge points being at the corner points of a parallelogram. Fig. 7 shows a construction of a universal tractor according to the invention and a combine harvester 122 mounted on the tractor, the driver's cab 14 being located at the front of the tractor. The combine harvester is driven by the tractor in a manner not shown. In this embodiment, the combine is provided with axle stubs 125 122 can be by means of which the combine 122 supports _t if it is not arranged on the tractor. 1 The combine harvester 122 is provided with fastening means 126 for fastening to the tractor 1. To remove the combine 122 from the tractor 1, the driver's cab 14 is pivoted into a more rearward position, after which the tractor 1, after the combine 122 is supported directly on the ground, can be driven away in reverse. It is not necessary to

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that the cutting table is removed from the combine and the arranging and removing the combine can be done in a very short time,

Fig. 8 shows an embodiment in which on the front, derseite of the universal tractor 1 according to the invention, a forage harvester 127 is arranged, while the tractor 1 with a tiltable cargo space 128 is provided. The forage harvester is driven by the front PTO shaft 129 of the Universal tractor 1. The cab 14 or 50 is included next to the forage harvester 127. The driver can do the work of the Observe the forage harvester very easily. The forage harvester is located directly in front of the tractor wheels and in front of the loading space, so that the weight distribution of the whole combination is beneficial. "

According to FIGS. 9 and 10, the cab 14 is at his lower side rotatably attached to a support arm 161, which by means of the vertical joint 162 and a support beam 163 with connected to the tractor and lockable.

According to the invention, the top of a loading area 166 of the tractor is suitable for receiving agricultural machinery or a loading area. The tractor contains a lifting device there which, in an advantageous embodiment, has four hydraulically actuated cylinders 167 and 168, respectively. The hydraulic cylinders 168 are located near the rear axle 3 of the tractor, while the hydraulic cylinders 167 are located near the front axle 2 of the tractor. In an advantageous embodiment, the hydraulic cylinders of the lifting device are provided with lugs 169 which interact with the machine or loading space to be attached to the tractor. At the front or · Buck side of the tractor is a lifting device arranged · On the back of the tractor has a three-point Hebevor-3? Ichtung 170 and on the front of a two-point lifting device 171 · In an advantageous embodiment of the invention, the motor 172 as well as the Veiter not shown drive device of the tractor 1 surrounded by substantially closed walls 173. It is advantageous that

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the mean wall height is less than the mean width of the Tractor, while the average length of the tractor is about 5-- up to 7 times that of Vandhöh ^ ·. It is also advantageous that the motor 172 with respect to the direction of travel of the Tractor is arranged transversely, with the engine 172 the rear wheels 5 is closer than the front wheels 5A.

In this advantageous embodiment, the driver's cab 14 is rotatable about two vertical axes that are connected to both Ends of the support arm 161 are arranged.

According to FIG. 11, on the tractor 1 is a loading space 186 arranged, which is used to collect the chopped material from a maize chopper 187 arranged at the front of the tractor. The maize chopper 187 is by means of a triangular linkage coupled to the two-point lifting device I71. The hold According to the invention, 186 is provided with support means 188 for direct support of the loading space 186 on the ground, if the cargo space has been removed from tractor 1. The cargo space is also provided with locking means 189. These exist essentially from a locking tongue: 190 and a cooperating part arranged next to the lifting cylinder 168 on the tractor. In addition, the hold is 186 according to the invention provided with a scraper floor 192, which over a transmission 193 and a propeller shaft 195 through the power take-off shaft the tractor is drivable. An embodiment of the cargo space is preferred, the upper part 196 of which is a horizontal axis 197 can be folded down in such a way that the height of the loading space 186 is approximately the same when the part 196 is folded down like the top of the cabin and is about 230 cm.

According to FIG. 12, fastening plates 198 are arranged on a lower frame beam 19I of the loading space 186, to which a rod 199 is pivotably fastened, which is further provided with a support part 200 adjustable by a screw Plate 201 attached to which a second rod 202 is pivotally connected .

Furthermore, the rack has beams. 19I a locking device 203, by means of which the rods 199 or 202 in a

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SAD ORIGINAL

horizontal position can be fixed when not in use will. The support or support device 188 of the cargo space 186 can be pivoted down ver when the cargo space from Tractor must be removed. For this purpose, the rod 199 is brought into the position indicated by dashed lines, while the end of the rod 202 is locked in the locking tongue 204. This situation can be achieved are after the hydraulic system of the lifting cylinder 168 is actuated, and the cargo space 186 lifted relative to the tractor is. If the loading space is supported by the support means 188, the tractor 1 can drive out from under the loading space will.

According to Fig. 13, a loading space 205 is arranged on the tractor 1, which on the rear with a spreading device 206 is provided, through which the material present in the hold can be scattered on the rear. In an advantageous Embodiment, this spreading device consists of spreading members 208 rotatable about vertical axes 207. On the front about a third of the length of the loading box 205 is provided with an axis 209 on which a support arm 210 or 211 is pivotably mounted, which arm is structurally similar to that according to FIG. The ends facing away from the axis 209 212 of the housings 210 and 211 are pivotably coupled to a second transverse axis 213 to which a blade 214 is attached is. Since the shovel 214 is thus connected to support arms in the same way that structurally the support arms according to FIG. 6 are similar, the blade 214 remains when rotating the arms formed as a chain housing about the axis 209 of the Front to back of the tractor in almost the same horizontal starting position. In this advantageous embodiment, the shovel 214 is provided with a locking device 216 provided, by means of which the shovel at the dropping point 215 can be emptied. The. This locking device 216 is also actuated hydraulically from the driver's seat 15 off.

The invention creates a tractor that thanks to its design as a pure tugboat. Mancnineii or

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Devices to pull or push while the tractor on the other hand, especially for carrying mutually interchangeable Machines or loading areas is suitable.

When the driver's position is roughly in the middle of the tractor is arranged, a good overview of any machines arranged at the front or rear of the tractor is guaranteed, and the tractor's center of gravity can be low.

-Patentans ρ r ü c h e -

309810/0239

Claims (16)

- ι? - 19664SS 1. Tractor or self-propelled tractor designed as a tractor Agricultural vehicle with a chassis on which devices such as work machines, loading boxes or the like are to be saddled up and with a rear mounted power lift, characterized in that on the longitudinal sides of the chassis (4) couplings (23 to 25J 57J 64 to 67; 85; 167f 168) to accommodate connections of the Devices are arranged. 2. Tractor according to claim 1, characterized in that the couplings (23-25; 575 85) are height-adjustable by means of lifting devices are. 3. Tractor according to claim 1 or 2, characterized in that the couplings (23-25j 85) locking devices (25; 110, 111) are assigned. 4. tractor according to one of claims 1-3 »characterized in that that the clutches (23-25; 85) are assigned centering surfaces (113) inclined towards one another. 5i tractor according to one of claims 2 to 4, characterized marked that the couplings can be raised above the chassis so that the connected Device (s) can be placed on floor supports and the chassis (4) can be moved under the device (s) that have been parked. 6. tractor according to one of the preceding claims, characterized in that the couplings (23 to 25; 57? 64 to 67; 85; 167, 168) close from the driver's seat of the tractor are actuated. 7 tractor according to one of claims 2-6, characterized in that that the lifting devices have at least one lifting cylinder. 8. Tractor according to one of claims 2-7, characterized in that that the clutches can be operated hydraulically. 9 · tractor according to one of claims 1 to 8, characterized in, that the tractor is equipped with at least one 309810/0239 BAD has device (55) for remote control of the connected device (s). 10. Tug according to one of claims 3-9 »characterized in that that the locking devices have locking pins (111) with at least one part (24; 110) the lifting device are connectable. 11. Tractor according to one of the preceding claims, characterized in that the clutches have centering surfaces directed obliquely upwards. 12. Tractor according to one of the preceding claims, characterized in that the front side of the tractor additional power lift (8) is arranged. ** Tractor according to one of claims 7-12, characterized in that that the lifting cylinder is under the top of the chassis (4). 14. Tractor according to one of claims 1 to 13, characterized in that locking devices on the tractor (51 to 56) are arranged for connection to the connected devices. 15 · tractor according to one of claims 1 to 14, characterized in that on the two longitudinal sides of the chassis (4) two couplings are arranged at a distance from each other in the direction of the tractor's longitudinal axis. 16. Tractor according to one of claims 1 to 15, characterized in that the couplings (23 to 25) have transverse bores (25) have. 309810/0239 Blank page