LT5552B - Universally applicable coupling system - Google Patents

Abstract

A tractor has a front or rear-mounted drawbar frame (1) that is coupled to a trailer or working tool e.g. plough frame (2). The two frames together form a universal link assembly. The hydraulic link connection (9, 10) between the two parts is effected between the two frames by the action of raising the tractor frame. The hydraulic fittings incorporate centering profiles.

Description

BACKGROUND OF THE INVENTION The present invention relates to a universal coupling system based on a two-frame coupling device used for attaching and securing implements suitable for attaching to the front and rear of wheeled tractors such as tractors, tractors and 1.1. When coupling, one part of the frame (1) on the tractor side is inserted on the other side of the frame (2) on the implement side and the lower control lever is raised using the hydraulic mechanical transmission on the tractor side. As a result, the two frame parts (1, 2) can be pressed together with one another. The frame part (1) on the tractor side is raised upwards using the hydraulic couplings (9, 10) which are securely connected to each other. The top of the frame support (6) has lower centering bushings (8) and inner parts (10), while the top of the housing (7) has upper centering bushings (21) and outer parts (9) secured by a adjusting pin on a plate (15) not mounted. (22) and pressure springs (23). The disc (15), which is not attached, is pressed into the adjusting screw (24). The system also includes a power cylinder (16) which allows for simultaneous horizontal coupling of the PTO shafts and locking of the frame parts (1), (2), and the locking mechanism (17) and the latch (17) can be actuated using the force cylinder (16). 17) pushed into the locking member (27) and the clamping part (18) attached to the latch (17) makes it possible to connect the PTO joints by means of the shifting teeth (12) and the drive disk (26).

The present invention relates to a universally used interconnection system based on a two-piece attachment device used for working. 5 attachments and attachments suitable for attaching to the front and rear of wheeled tractors such as tractors, tractors and 1.1.

The drawbar attaching a particular implement to a tractor using a three-point attachment mechanism is described in AT 403 752 B. The disadvantage of the mechanism disclosed in the above-mentioned patent is that there is only one connection that transmits power to the drive shaft of the device and only parts of frames. In this case, the exact position of the drive is also necessary.

DE-A-43132889 describes a coupling device consisting of a coupling device, one frame part to the tractor and the other frame part to the implement, a locking device with a mechanical locking device, standard plug connections for hydraulic frame joints of vertically mounted portions of the drive shaft and the PTO shaft and are displaced by means of a hydraulic short stroke cylinder. The disadvantage of this design, described in DE-A43132889, is that the horizontal connection requires an accurate approach position.

The advantage of the described structure is the designed vertical hydraulic coupling system characterized by features. This makes it possible to tilt the tractor to the implement, so that the individual frame parts can be accurately attached to each other. The interaction of the described features makes it possible to hook the part of the frame with the upper part precisely to another part of the frame with the upper body, depending on the position.

The prior art DE-A-43132889 states that hydraulic, pneumatic '; or the power lines are interconnected with each other in the horizontal direction, while the invention is provided

- The features described in Definitions 25, 1 to 3 allow vertical coupling, thus providing greater operational safety than horizontal coupling. Furthermore, the present invention differs from the preceding ones in that not only the drive shaft coupling but also the blocking of the frame parts is performed using a force cylinder, although in the prior art the blocking of individual frame parts was performed separately from the drive shaft coupling.

The disadvantage of the prior art is that prior art connection to multifunctional devices required the use of many different hydraulic connection lines and plug connectors, as well as adaptations to the design of the tractor. In this case, the contacts were sometimes misplaced because each plug connector had to be connected individually, manually. The driver often had to get out of the driver's cab and enter a dangerous area.

However, it is an advantage of the present invention that the fully automatic rotating parts of the hose, including hydraulic connections to the feed and recirculation lines and the connection to the multifunctional equipment, are already integrated in the individual frame parts of the present invention.

The present invention is further supplemented by a removable, displaceable and lockable drive shaft centering and insertion portion with a PTO shaft, which allows adapting the PTO shaft to different categories of PTO shaft without changing the entire frame, rotating or changing the PTO shaft years.

The centering and insertion portion of the PTO shaft is adapted to the tractor using the PTO shaft when the PTO shaft fork above the bearing is centered through the guide ring on the bearing housing of the PTO centering and insertion portion through the support described in the previous invention.

It is an object of the present invention to provide a coupling system that securely secures the individual parts of the frames while at the same time providing a robust coupling of the hydraulic links and precise connection of the PTO, since both parts of the frames are locked. This coupling system allows the implements to be connected directly from the driver's cab without having to leave the cab.

Another advantage is that there is no risk of injury from rotating couplings (rotating PTO shafts or bursting of high-pressure hydraulic lines), as no persons are in this danger area during tensioning. This interconnection system can also save you time as you do not need the help of a second person to connect.

This problem was solved by utilizing the features of the device mentioned in the sections of the patent application definition.

The present invention is illustrated in the drawings.

FIG. 1 is an isometric view of a universal coupling system prior to attaching a three-point hitch to a tractor and implement.

FIG. 2 is a sectional view of the universally applicable interconnection system (sectional plane B).

FIG. 3 is an isometric view of the universal coupling system from the side of the tractor, partial section.

FIG. 4 is an isometric view, from the machine side, of the universal coupling system on the tractor side.

FIG. 5 is an isometric view of the three-point linkage mounted on the side of the unit.

FIG. 6 is a sectional view of a commonly used interconnection system with the devices connected (sectional plane A).

FIG. 7 is a sectional view of the mechanical locking mechanism (cut plane A).

FIG. 8 - Isometric view of centering and tensioning portion of movable PTO shaft.

FIG. Figure 1 shows the coupling system according to its arrangement on the towing machine (tractor, tractor, etc.) when it is ready for the tensioning process. The drawings do not show either the tractor (because it is used front and rear) or the implement (because it can be adapted universally). The lower hinged panels 5 are used to mount the tractor lower link and are firmly attached to them. The upper hinged panels 4 allow connection to the tractor's upper control lever.

The PTO shaft 3 is adjustable in length, mounted on the tractor PTO shaft and connected to it.

One frame part 1 is attached to the device. The other frame part 2 is subsequently attached to the old devices by means of a universal mounting frame plate 28. This construction of frame part 2 is usually in the form of an inverted letter V and together with the other frame part 1 on the side of the tractor forms a common frame unit.

When coupling, one frame part 1 on the tractor side is mounted on the other frame part 2 on the unit side and the lower adjusting lever is raised using the hydraulic mechanical transmission on the tractor side. As a result, the two frame parts 1, 2 can be pressed together with one another.

The merge process will be described below. FIG. 2 shows the parts 1 and 2 of the frames when they are already pressed together. The upper part 6 of the triangular support shows the lower centering bushes 8, into which the inner parts of the hydraulic connections 10 are inserted and fixed there. The hydraulic couplings 10 are connected to the tractor by hydraulic lines 13. The upper housing 7 has an unattached metal plate 15 in which the outer parts of the hydraulic couplings 9 are inserted into the upper centering bushes 21 and move along their axis. The upper centering bushes 21 on the metal plate 15 are secured by the adjusting pin 22 and the pressure springs 23. The upper centering bushes 21 thus secured secure the hydraulic couplings by raising one part 1 of the frame upwards and sliding it into the upper body 7, the upper part 6 centering on the other frame. Before reaching the end position, the centering bushes 8 and 21 are aligned over the unattached metal plate 15. The unattached metal plate is pressed into the adjusting screw 24 and the hydraulic connections 9 and 10 are securely connected to each other. Therefore, it is ensured that the hydraulic connections 9 and 10 are in working position and that hydraulic pressure can build up. The use of two oil pressure lines 13, 14 with supply and recirculation lines affects the build-up of hydraulic pressure.

After the kinematic joining of the two frame parts 1 and 2, the coupled unit is blocked.

The construction and method of operation of the interlocking and PTO joint 11 on the side of the unit will be described below. The latch 17 is secured to the short stroke cylinder 16 and, after the short stroke cylinder 16 is actuated, is pushed into the blocking aperture 29 at the blocking member 27. The short stroke cylinder 16 is secured to the support flange 31 of the guide sleeve 32 by means of a blind flange 30. can be optionally supplemented, so mechanical locking is also possible. The latch 17 is pushed into the guide sleeve 32 and screwed to the short stroke cylinder 16. FIG. 4 and FIG. 6 shows the connection of the PTO shaft 11 on the side of the device. During locking, the gripper portion 18 attached to the retainer 17 is pulled together, thereby causing the pulling tooth 12 to be pulled together, which is mounted on the spring support members 25 so that it can rotate.

Then, the shifting pin 12 pushes the PTO shaft coupling, which is used to transmit torque through the drive disk 26 to the drive shaft (not shown) on the side of the device. The centering housing 19 with the welded guide sleeve 33 for the PTO shaft connection 11 is connected with a steel screw 20 to one part of the frame 1 and can therefore be upgraded.

The operation of the mechanical interlock will be described below. When the control lever 34 is actuated, the mechanical lock 35 is moved in its axial direction. The compression spring 36 ensures that the latch 35, when locked by the locking member 27, which is part of the frame 2 on the side of the device, remains in the same position.

After removing the working device not shown in the drawing, the locking of the locking device 17 by means of the short-acting cylinder 16 is performed in the reverse order according to FIG. 6, at the same time separating the drive shaft coupling 11 used to transmit the torques through the sliding tooth 12. When unlocked, one frame part 1 on the tractor side can be lowered, at the same time the two hydraulic couplings 9 and 10 are loosened. When the frame part 1 is completely lowered, the unit can be easily uncoupled from the tractor.

The preferred embodiment of the centering body 19 comprises a centering body as shown in FIGS. 8 consisting of a centering body main body 37 which is screwed to a single frame part 1 by a steel screw and a PTO centering and tensioning part 40. This centering and insertion part 40 of the PTO shaft can be slid horizontally to the guide sleeve 38 through the guide sleeve 38 centering housing 37.

The standard PTO shaft fork 41 is coupled to the front PTO shaft fork 42 on the tractor side for transmission of power.

Depending on the dimensions, the rear PTO shaft fork 41 is inserted into the bearing housing 43 of the PTO centering and insertion portion 40. Therefore, a bearing 44 is mounted on the rear PTO shaft 41 to ensure proper engagement of the rear PTO shaft 41 teeth with the machine side the guide shaft 47 is fitted to the fork of the PTO shaft.

For units without a PTO drive shaft, the PTO centering and insertion portion 40 is locked in the shut-off hub 46 using a release screw 45 in the centering housing main body 37. If the PTO shaft replacement is required, the PTO centering and insertion portion 40 can be manually displaced and removed. together with the PTO shaft 3. These features show that here>

The universal coupling system described herein can also be used for machines without a propeller shaft - centering and insertion part.

The advantage of this recommended design of the centering housing 37 is that the PTO shaft is almost non-tiltable, which results in an even transmission of power to the machines, since the new design of the centering unit 37 allows for a longer PTO shaft.

List of elements shown in the drawings:

- the part of the frame from the tractor-tractor side;

- part of the frame from the side of the unit;

- mechanical transmission - drive shaft;

- triangular, hinged panels for upper adjustment lever;

- triangular hinged panels for the lower adjustment lever;

- upper part of triangular support;

- support upper body - matching frame;

- lower centering bush;

- connection socket - outer part;

- connecting plug - inner part;

- PTO shaft coupling;

- shifting tooth;

- hydraulic supply line (open);

- hydraulic recirculation line (closed);

- non-attached plate;

- short stroke cylinder;

- latch;

- chuck part;

- centering housing;

- screw connection;

- upper centering bushing;

- adjusting pin;

- compression spring;

- adjusting screw;

- support element;

- drive wheel;

- blocking element;

- frame plate;

- blocking hole;

- blind flange;

- support flange;

- guide sleeve;

- guide sleeve - welded;

- control lever;

- latch;

- compression spring;

- centering body - main part;

- guide sleeve;

- pointing finger;

- PTO shaft centering and insertion part - complete;

- Rear PTO shaft fork - PTO shaft fork on the side of the machine;

- PTO shaft fork from tractor side;

- bearing housing;

- bearing - rear PTO shaft fork;

- release screw;

- shut-off hub;

- guide ring.

Claims (7)

Definition of the Invention 1. A universal coupling system consisting of a coupling device with one frame part on the tractor and another frame part on the working unit, locking device with 5 with mechanical locking mechanism, plug-in hydraulic lines, pivoting shaft which is vertically displaced by frame parts, which is displaced by means of a hydraulic force cylinder, in that the frame part (1) has an upper part (6) with centering bushes (8) the frame part (2) having an upper body on an unmounted plate (15) with axially movable centering bushes (21) 10 for centering and joining the hydraulic joints (13), (14) vertically with the frame part (1) on the tractor side being raised and also having a power cylinder (16) that allows for simultaneous horizontal joining of the PTO joints and locking of the frame parts (1), (2), furthermore, by means of a force cylinder (16), it is possible to engage the latch (17) and push the latch (17) into the locking member (27), and a gripper part (18) is attached to the latch (17), using shift teeth (12) and a drive disk (26), 15 provides the ability to connect PTO shaft couplings. 2. The coupling system according to claim 1, characterized in that the upper part (6) has lower centering bushes (8) and inner parts (10), and the top part of the housing (7) has upper centering bushes (21) and outer parts (9). 3. The coupling system according to claim 2, characterized in that the outer parts (9) in the upper centering bushes (21) are secured to an unattached plate (15) with axial movement by means of adjusting pins (22) and pressure springs (23). 4. Coupling system according to claim 1, characterized in that the centering body (19) with the guide sleeve (38) has been modernized for the PTO shaft connections (11) by means of screw couplings (20) in the frame part (1) on the tractor side. 25th 5. A coupling system according to claim 1, characterized in that a fully mechanical interlock is provided by means of a latch (35), a compression spring (36) and a control lever (34). 6. A coupling system according to claim 4, wherein the centering body (19) comprises a main part (37) and a centering and insertion part (40) of the PTO, while the centering and tensioning part (40) of the PTO using a guide finger (19). 39) through guides The 30 sleeves (38) to the center part (37) of the centering housing can be moved horizontally, uncoupled, manually replaced and locked. 7. Coupling system according to claims 1, 2, 3 and 6, characterized in that the rear PTO shaft fork (41) on which the guide ring (47) is mounted is inserted through the bearing (44) into the centering and retracting portion (40) of the PTO shaft. ) bearing housing (43). l5 ^{5552 Β}