Automatic trailer hitch

 

(57) Abstract:

The invention relates to towing devices for transport engineering. Automatic trailer coupling device comprises a traction element, which consists of a metal casing in the shape of a hollow cylinder with a cone - trap on one side and a lid connected to the body by threads and having a cavity, which contains the reed switch with the other. As in the housing and the cover are the lugs that hold the rubber band from the offset. The bandage has a cavity for pouring oil and the neck is rigidly inserted into it a fitting to which provorachivaetsya hose that connects the valve to the hydraulic system of the tractor with the cavity of the tire. The coupling element is designed in the form of a metallic finger pivotally connected to the shaft, on which is rigidly mounted rubber element with a cavity in which the air under pressure of several atmospheres, and with a cavity in the forward portion of the rubber element, which covered magnetic powder acting on the contacts of the reed switch, part of the hydraulic circuits of the trailer hitch having, in addition, toggle switch, indicator light and power the PA, hard backlash-free coupling and damping of shock loads, which reduces the braking distance, reduce fuel consumption, increase productivity, transport trains and to improve the working conditions of the driver. 5 Il.

The invention relates to towing devices, vehicles, and is intended to be coupled tractor-trailer or agricultural machine.

Known coupling device containing equipped with stabilizer rotation of the traction fork pivotally connected with the last rod with a transverse hole, a buffer consisting of a body and placed inside the elastic element covering the said rod, and a retainer made in the form of spring-loaded pins are placed in the specified transverse hole of the stem, and in the case of buffer grooves are available under the said pins, in addition, pulling the plug is provided with a flat stop, the stabilizer of rotation of the fork is made in the form of a clip placed on the rod with the opportunity to interact one end of the elastic element of the buffer and the other with a specified focus fork, moreover, in the holder has holes for the pins lock /see USSR author's certificate N872319, MKI B 60 D 1/00, bull. N 38, publ. 15.10.81/.

The closest known technical solutions is a trailer hitch that contains traction element, a coupling element connected to the shaft, which is made in the form of covering the traction element of the elastic ring T-shaped section located inside the annular T-shaped cavity filled with fluid through the nipple channel enclosed by the peripheral portion of its diameter between coaxially spaced upper and lower rings in their circular drillings on facing to each other surfaces, while the upper and lower rings, forming a coupling loop, made narashima-associated respectively with placed one above the other coupling rods semicircular cross-section, connected to the drawbar with the possibility of formation between a clearance and traction covered by an oval ring and passed through its thickness in the wall of the lever-latch and contain under oval ring deepen their interaction with lever-lock /see USSR author's certificate N1423434, MCI D 60 D 1/04, bull. N 34, publ. 15.09.88 g/.

The technical task of the invention is to automate the coupling and rascepa, the possibility of damping simultaneously with hard gapless coupling, as well as expansion due to deformation of the elastic element angles of swing of the level trailer both in vertical and in the horizontal plane.

This object is achieved in an automatic trailer coupling device, which includes a traction element, a coupling element connected to the shaft, where, according to the invention, the traction element is equipped with a metal housing made in the form of a hollow cylinder with a cone-trap on one side and a lid connected to the body by threads and having a cavity, and places the reed, on the other hand, at the same time as the housing and the cover is provided with lugs that hold the rubber band from offset, in turn having a cavity for pouring oil and the neck is rigidly inserted into it a fitting to which provorachivaetsya hose, connecting through the last valve of the hydraulic system of the tractor and the cavity of the tire, and the coupling element is designed in the form of a metallic finger pivotally connected to the drawbar, kotorye also with a cavity in the forward portion of the rubber element, where buried magnetic powder acting on the contacts of the reed switch, part of the hydraulic circuits of the trailer hitch having, in addition, toggle switch, indicator light and the solenoid associated with the valve of the hydraulic system of the tractor.

Comparative analysis of the prototype allowed us to conclude that the claimed technical solution has novelty, as opposed to prototype this design has a traction element consisting of a metal body in the shape of a hollow cylinder with a cone-trap on one side and a lid connected to the body by threads and having a cavity, and places the reed, on the other hand, while in the case and the cover are the lugs that hold the rubber band having a cavity for pouring oil and the neck is rigidly inserted in her fitting with thread, to which provorachivaetsya hose that connects the valve to the hydraulic system of the tractor with the cavity of the tire, and the coupling element is designed in the form of a metallic finger pivotally connected to the shaft, on which is rigidly mounted rubber element with a cavity in which the air under pressure of several atmospheres, as well as the cavity is tamago part of the hydraulic circuits of the trailer hitch, having, moreover, toggle switch, indicator light and the solenoid associated with the valve of the Prime mover.

The technical solution of the problem is illustrated by drawings.

In Fig. 1 shows a trailer hitch;

in Fig. 2 - the same, increased, until the flow of oil in a bandage;

in Fig. 3 - the same, increased, after the flow of oil in a bandage;

in Fig. 4 - the same, increased, the interaction of the magnetic element from the sensors;

in Fig. 5 is a hydraulic circuit of the trailer hitch to the tractor hydraulic system.

Trailer hitch consists of a hydraulic housing 1, which is in the form of a hollow cylinder with a cone-trap 2 on the one hand and the lid 3 with the other hand. In the cover 3 has a cavity 4, and places the switch 5. The cover 3 is connected to housing 1 by means of threads. The housing 1 and the cover 3 are lugs 6 that hold the rubber band 7 with a cavity 8 for pouring oil. Band 7 has a neck 8 which is rigidly inserted the nozzle 10 with thread. To the fitting provorachivaetsya hose 11 connects the distributor of hydraulic system with a cavity 8 band 7. To the shaft 12 of the vehicle by means of the swivel 13 is fastened metal finger 14, in which W is, and the cavity 17 in the nose, which covered magnetic powder. Magnetic powder interacts with the contact 18 of the switch 5, which is included in the hydraulic circuit of the trailer hitch. In addition, the hydraulic circuit comprises a switch 19, which may be in one of three positions, a control lamp 20 and the electromagnet 21, associated with the hydraulic system of the tractor.

Offer automatic trailer hitch provides automation of the coupling and rascepa, the possibility of damping simultaneously with hard gapless coupling, expansion due to deformation of the elastic element angles of swing of the level trailer both in vertical and in horizontal planes.

The proposed design automatic traction device works in the following way. When engaged, the truck driver switches the toggle switch 19 is in position "C" and drove up to the trailer drawbar. Continuing to move in reverse, it makes the rubber member 15 to slide along the hook 2, which sends the element 15 in the center of the rubber band 7. When the nasal cavity 17 of the rubber element 15 will be close to the desired distance, the magnetic powder causes of knosos will go through the hose 11 into the cavity 8 of the brace 7. As the machines are usually pumps big enough performance with supply from 0.29 DM3/s to 0.93 DM3/s and the capacity of the brace 7 will not exceed a few liters filling bandage will happen very quickly for 1-2 seconds. After this time the driver switches the toggle switch 19 in the transport position. The warning lamp will continue to burn, signaling healthy work.

During uncoupling of the tractor from the trailer, the driver switches the toggle switch 19 is in position "O" - uncoupling. The electromagnet 21 moves the anchor to the appropriate position, and the oil from band 7 will flow into the drain tank. After that, the truck pulls away from the trailer.

Offer automatic trailer hitch provides automatic engagement and disengagement of connected links, the expansion due to the deformation of the elastic element angles of swing of the level trailer both in vertical and in horizontal planes, and the ability damping simultaneously with hard gapless coupling, which reduces the braking distance, reduce fuel consumption, increase productivity, transport trains and to improve the working conditions of the driver.

Estomacales fact, the traction element is equipped with a metal housing made in the form of a hollow cylinder with a cone-trap on one side and a lid connected to the body by threads and having a cavity where you place the reed on the other hand, at the same time as the housing and the cover is provided with lugs that hold the rubber band from the offset, in turn, having a cavity for pouring oil and the neck is rigidly inserted into it a fitting to which prevernal hose with connecting through the last valve of the hydraulic system of the tractor and the cavity of the tire, and the coupling element is designed in the form of a metallic finger pivotally connected to the shaft, on which is rigidly mounted rubber element with a cavity in which the air under pressure of several atmospheres, and with a cavity in its forward part with a magnetic powder, acting on the contacts of the reed switch, part of the hydraulic circuits of the trailer hitch having, in addition, toggle switch, indicator light and the solenoid associated with the valve of the hydraulic system of the tractor.

 

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