DE3506466A1 - Trailer coupling for towing vehicles - Google Patents

Abstract

Trailer coupling having a coupling jaw (1) which is vertically adjustable in vertical slots (4) of perforated rails (5) fixed to the vehicle, can be secured by means of bolts (11) and can be adjusted and secured below the power take-off on the perforated rails (5) in an oblique position, which provides clearance for the power take-off according to regulations, by means of a lock-in swivel pin (14) (Fig. 1). <IMAGE>

Description

Trailer coupling for towing vehicles

The invention relates to a trailer coupling for towing vehicles, in particular for agricultural tractors with a Three-point linkage for attachments and a power take-off shaft, with a coupling jaw, the support bracket with in vertical Slits of two tractor-proof perforated rails, engaging guide strips, height-adjustable and depending on the distance between the holes Locking points located at different heights can be fixed by means of bolts or the like.

It has become known from EP-PS 00 16 317 a trailer coupling of the type mentioned, in which the coupling jaw is also guided via a support bracket in vertical slots in the perforated rails. The bolts to fix the Coupling jaws in a height position given by the hole spacing of the perforated rails are axially displaceable in the support bracket stored and can be operated together via a hand lever. Between the two perforated rails that Reach relatively far down, the PTO is arranged. However, the length of the perforated rails is not sufficient from shifting the coupling jaw so far down that with simultaneous use of the top link of the implement attachment and the power take-off shaft for this or a cardan shaft the required clearance is available stands. The coupling jaw must then be removed.

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TN 0103 0027/01 (F 360/1) ■> n nnn 9 fw

Klöckner-Hu ^ toldt-Deutz AG

February 20, 1985 D 85/09

The invention is based on the object of providing a trailer coupling of the type outlined at the beginning with simple To improve means to the effect that the coupling mouth with simultaneous operation of the device attachment device and the PTO shaft can remain on the perforated rails without impairing the required clearance of the PTO shaft, or to significantly reduce the ground clearance of the tractor.

The object is achieved in that the Coupling mouth at the lower end of the perforated rails can be set in an inclined position, with all parts of the Coupling lie below an inclined plane that limits the space required for operating a cardan shaft.

The inclined position of the coupling jaw will be chosen so that that on the one hand the freedom of movement of the PTO shaft or a connected PTO shaft is guaranteed and on the other hand the ground clearance of the tractor is not significantly impaired.

The perforated rails are appropriately angled in the lower area to avoid the inclination and to fix the coupling jaw to enable. According to a simple embodiment of the invention, the coupling mouth is above his Support bracket can be fixed in the pivot position by the bolt used to fix its height position.

A structurally advantageous solution is that for the support bracket in at least one of the two perforated rails In the lower area an engaging and disengaging pivot pin is arranged, the axis of which is transverse to the longitudinal axis of the vehicle runs and the near the upper end of the guide bar has a recess as a latch, the

Klöckner-Hijmboldt-Deutz AG £ Λ *% Π % Λ 3506466 ί-

February 20, 1985 * D 85/09

Slots in the perforated rails in the swivel area of the support frame according to the intended swivel angle for the coupling jaw are expanded by front delimiting edges that run obliquely to the front.

According to another development of the invention, the pivot pin is in one of the corresponding perforated rail attached sleeve and loaded by the force of a spring in the direction of engagement, with one for the pivot pin downwardly open groove-shaped recess in the guide bar is provided as a detent and wherein the pivot pin can be released against the spring force by means of a handle and can be fixed in this state.

An embodiment of the invention is described below Described in more detail using the drawing. It shows:

Fig. 1 is a side view of a trailer coupling according to the

Invention; \

Fig. 2 is a section along the line II-II in Fig. 1 in. larger scale.

The trailer coupling according to FIG. 1 has a coupling mouth 1 which is constructed in the usual way according to its intended use. The coupling jaw 1 is seated on a support bracket 2, which has a protruding vertically extending guide strip 3 on each side, which engage in vertical slots 4 of two perforated rails 5 which are fixed to the tractor so as to be slidable in the longitudinal direction. The perforated rails 5 are angular in cross-section, one leg 5 ^{1 resting} against the rear wall of the tractor and serving to accommodate fastening screws (not shown). Between the two perforated rails 5 is a pin shaft 6 for

TN 0103 0027/01 (F3aO / 1)

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K! Cckner-Hii! T, bc! D; -Deutz AG £ Λ ULM [! J 3 5 O 6 A 6

February 20, 1985 D 85/09

Connecting a cardan shaft arranged. The two vertical slots 4 in the perforated rails 5 essentially have parallel front and rear delimiting edges 7 and 8, respectively. At the rear edges 9 of the two Perforated rails 5 are each provided at the same height semicircular recesses 10 into which, depending on the height of the Coupling jaw 1 a bolt 11 engages by the force of a spring 12. The disengagement of the bolt 11 for adjustment the height of the coupling jaw 1 takes place with a hand lever 13. Below the lowermost locking point 10 'protrudes into the slot 4 shown is a pivot pin 14 which, as shown in FIG Sleeve 15 guided urjd loaded by a spring 16 is. An angled hand lever 17 is used to actuate the pivot pin 14 in the disengaging direction. The one in the slot This perforated rail 5 engaging guide strip has a hole in the upper area for engaging the pivot pin 14 on. Said bore can also be used as a guide bar, as shown by the dash-dotted line 3 be expanded downwardly continuous groove 18. To achieve the sloping position of the trailer coupling shown, is in each perforated rail 5, the front boundary edge 8 of the slot 4 to expand the same in the shown Way angled forward. This widening of the two slots 4 in the lower area brings about the support bracket 2 due to its center of gravity by rotating about the pivot pin 14 in the inclined position shown, the Bolt 11 for fixing the coupling jaw in a special semicircular intended for the pivot position of the coupling jaw 1 Recesses 19 at the lower end of the two perforated rails 5 snap into place.

Klöckner-Humboldt-Deufz AG ΖλΛ HHD 3506466

February 20, 1985 D 85/09

Due to the inclined position of the trailer coupling shown, the standard-compliant free space outlined by the line 20 is for the PTO 6 or a cardan shaft guaranteed. In addition, there is also unrestricted freedom of movement for the Given above the PTO upper link of an implement attachment device.

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Claims (5)

Klöckner-Hunboldt-Deufz AG ΰΛ KHD 3506466 5000 Cologne 80, February 20, 1985 D 85/09 AE-ZPB Da / B claims 1. Trailer coupling for towing vehicles, in particular for agricultural tractors with a three-point linkage for attachments and a PTO shaft, with a coupling jaw, the support frame of which is height-adjustable with guide rails engaging in vertical slots of two tractor-fixed perforated rails and, depending on the hole spacing, locking points at different heights can be fixed by means of bolts or the like ,
characterized in that the coupling mouth (1) at the lower end of the perforated rails (5) can be set in an inclined position, with all parts of the coupling lying below an inclined plane (20) which limits the free space necessary for the operation of a cardan shaft. 2. Trailer coupling according to claim 1, characterized in that the perforated rails (5) angled in the lower region to enable the inclined position and the fixing of the coupling jaw (1). 3. Trailer coupling according to claims 1 and 2, characterized in that the coupling mouth (1) over his Support bracket (2) can be fixed in the pivoted position by the bolt (11) used to fix its height position. TN 010300274ft (FJJ6Q / 1I Klöckner-Hun- ·: ^ ldt-Deufz AG / sA I% HD 35 06 466 zO.02.1985 D 05/09 4. Trailer coupling according to one of the preceding claims, characterized in that an insertable and disengageable pivot pin (14) is arranged for the TragDock [Z) in at least one of the two perforated rails (5) in the lower region, the axis of which is transverse to the longitudinal axis of the vehicle and which near the upper end of the guide bar (3) has a recess as a detent and that the slots (4) of both perforated rails (5) in the pivoting range of the support frame (2) according to the intended pivot angle for the coupling jaw (1) through obliquely forward front Boundary edges (8) are expanded. 5. Trailer coupling according to one of the preceding claims, characterized in that the pivot pin (14) guided in a sleeve (15) attached to the corresponding perforated rail (5) and by the force of a spring is loaded in the direction of engagement that for the pivot pin (14) a groove-shaped recess open from below from the detent (18) is provided in the guide bar (3) and that the pivot pin (14) counter to the spring force by means of a handle (17) is detachable and can be fixed in this state. BATH ORIGINAL