Trailer hitch

 

(57) Abstract:

The invention relates to the automotive industry and relates to coupling devices, ball type, designed for attachment of various trailers for hire. The inventive trailer coupling device comprises a coupling ball head 1, building 2, covering her. The body 2 and the clamping element 7 together with the locking mechanism and the handle locks the ball head in the housing. The handle includes a lock its rotation relative to the matching element 12. On the housing 2 and prijemnom element 7 has projections 8 and 9, and on the grip-slots 10 and 11. 2 Il.

The invention relates to the automotive industry and relates to coupling devices, ball type, intended for connecting a variety of trailers for hire.

You know trailer hitch, containing hitch ball head mounted on a vehicle, the casing covering the specified cylinder and connected with another vehicle, a clamping element, clamping named head in the housing, a lock mechanism and handle. To improve productivity and increase reliability, a clamping element is designed in the form of a lever G-enabling them to rotate in a vertical plane relative to the housing. They are connected movably matching element. In the closed operating state of the axis of the arm and matching element are the same.

Known hitch can be improved by the present invention.

To prevent backlash and clearances on the bracket body and the l-shaped clamping element is made of cylindrical protrusions, on the body of the handle is made corresponding holes (grooves), which are in engagement with named tabs and perceiving along the axis of the drawbar load on himself.

The aim of the invention is to increase the ability of the locking mechanism to perceive more powerful loads, for example, transportation residential trailer or damaged vehicle and so on, and at the same time reducing the time on the hitch and receptu castle.

This goal is achieved by the fact that in the hollow handle has a spring-loaded rod that locks the locking device, when put one end into the matching socket element.

In Fig.1 shows the locking device in a closed and locked condition; Fig.2 section a-a in Fig.1.

According to the invention hitch vklucheny covers the ball head 1 and is rigidly connected to the trailer drawbar. The housing 2 is made in the form of a Cup with one open side to move it ball head 1 along and around the axis of reference in the bottom of the glass.

On the bracket 3, located to the upper outer side of the housing 2 are mounted on axes 4 and 5 of the swivel arm 6, a clamping element 7, made in the form of a lever G-shaped. On the housing 2 and prijemnom element 7 with the two sides of the fixed protrusions 8 and 9, and the body of the arm 6, respectively, these lugs are made open grooves 10 and 11 are intended for fixing the housing 2 with the clamping element 7. In matching element 12 is a hole 13 for the rod retainer 14, which is permanently tightened by the spring 15 of the adjusting tube 16. The rod 14 is connected with the movable handle 17 by means of a cotter pin 18. The pin 18 is moved in the longitudinal groove 19 of the guide tube 20.

The principle of operation of the trailer hitch is obvious from its construction.

To hitch the trailer to the car to enter the cylinder 1 in the socket housing 2 of Fig. 1. To lower the handle 17 in the extreme lower position until it clicks rod retainer 14 when he enters into the hole 13 a matching network 12.

For uncoupling the trailer from the car enough to pull the handle 17 and then the Trailer HITCH trailer, contains mounted on one link of the ball head, covered by a housing associated with the other element, a clamping element for fixing the head in the body of the actuator is made in the form of a handle, and a lock mechanism that includes the matching and backing elements, characterized in that the handle is hollow and in it placed the lock lever relative to the matching element, which includes a rod configured to move along the arm and the interaction between its end with a hole made in a matching element, and on the body and prijemnom element are protrusions having the opportunity to interact with the grooves, performed on the handle.

 

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