Road train drawbar

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Road train comprises ball head consisting of two parts: upper and lower. Lower part is made integral with drawbar bracket and incorporates circular ledge. Upper part is arranged to move in trailer gooseneck casing. Lower part circular ledge represents a rod with multi thread engaging with mating thread made on its upper part. Square hole is made on top part outer face. Said hole interacts with spring-loaded pin of similar section furnished with handle and fitted to move in gooseneck opening. Face surface of said top part of ball head has diametrically opposite semi-spherical recesses in contact with bal stops. Said stops are arranged on bal head lower part face surface.

EFFECT: higher reliability due to threaded joint made on lower and upper parts of drawbar.

2 cl, 1 dwg

 

The present invention relates to the field of trackless vehicles and can be used in towing devices, cars and trailers, as well as in the construction of articulated buses.

You know trailer hitch-trailer trucks (see the book Shchukin MM Coupling cars and trucks. M-L: the motor cycle", 1961, p.35, Fig), consisting of a passenger automobile or bus. This device is made up of a ball that ends drawbar curved shape, and a hemispherical head of the tiller covers it, thereby ensuring connection of the links of the trains. To exclude rascepa trailer drawbar trailer mounted lock, made in the form of a spring-loaded lever provided with a lock. The disadvantage of this traction device is the low reliability in operation, as it does not exclude the possibility of movement of the latch under the action of friction between the ball, hemispherical head and the surface of the lever in contact with the ball, forgetfulness staff for installing clamps etc.

It is also known trailer hitch combination (patent RU 2230675), consisting of a ball head, which is made of two parts. The bottom part is made in one piece with the bracket drawbar mouth is eusto car, and the upper part movably accommodated in the housing of the trailer drawbar. The lower part on the entire inner flat surface provided with a circular protrusion and the upper mating cavity. Both parts of the ball coupling connected between a connecting finger, fixed ball retainer bracket trailer hitch of the vehicle. Despite the excellence of this design, the latter has a significant drawback, namely, that increasing the lifetime of the vehicle in the area of contact of the projection and depression parts ball heads that do not have a rigid connection will be increased wear their mating surfaces. Such wear will create conditions for the emergence of the radial clearance between the mating protrusion and a depression that will lead to significant dynamic loads that can lead to failure of the trailer hitch, and hence the crash.

Therefore, the aim of the invention is to improve the reliability of the coupling parts of the ball coupling and traffic safety of trains.

This objective is achieved in that the circular projection at the lower part of the ball head is made in the form of a rod with chopped it donehogawa thread, interconnected with the response made in its upper part and sleep is defined at its outer end a hole of square cross section, interacting with such section spring finger has an arm and movably mounted in the hole of the trailer drawbar, and at the end surface of the aforementioned upper part of the ball head turned in the direction of its lower part made of at least diametrically located relative to each other two hollows hemispherical shape, in contact with the ball detents mounted on the end surface of the lower part of the ball head. On the drawbar of the trailer in its longitudinal plane, placed the ball retainer interacting with depression is made on the handle of a finger.

The drawing shows a trailer hitch in the section.

Trailer hitch consists of a bracket 1 trailer hitch of the vehicle, which is the common part with the lower part 2 ball head. The lower part 2 ball head is equipped with clamps 3, which are located in the recesses 4 in the top part 5 ball head. The lower part 2 ball head provided with a rod 6, interconnected by means donehogawa thread 7 with mating threads in the top part 5 ball head, and it made the hole 8 square section that interacts with the finger 9, movably mounted in the shaft 10 and a spring-loaded compression spring 11. The finger 9 is equipped with growling is ω 12, with the depression 13 in contact with the clamp 14 mounted on the shaft 10.

Works trailer hitch as follows. The drawing shows a trailer hitch when the trailer (not shown), or rather his shaft 10 is connected with the upper part 5 of the ball bearing and the lower part 2 of the ball joint through the bracket 1 trailer hitch with vehicle (not shown), as is generally the case in serial constructions, as well as described in materials and analog prototype. For uncoupling the vehicle and trailer must set the rig on a flat horizontal surface and with one hand, pushing down on the finger 9, move it in direction of the arrow until then, until it snaps into the hole 8 of square section, and then turn the lever 12 in a counterclockwise direction about the axis YY of the device at an angle of 180°. This angular rotation of the lever 12 will provide rotation of the upper part 5 ball head on the arrow In, and since it is interrelated with donehogawa thread 7 with the bottom part 2 ball head, overcome resistance to angular rotation of the clamps 4, will vinciata with the rod 6 in the direction opposite arrow a, and together with the shaft 12 to move in the same direction. As part of the 5 ball head will leave the threaded rod 9, the vehicle is ready to move, and the trailer remains IU the ones i.e. recepce links trains produced. The hitch links of a combination is as follows. The car serves rear swing in the direction of arrow C. as soon As the lower part 2 ball head, or rather its rod 6 will be put at the top part 5 of the ball head, the latter together with the drawbar is lowered in the direction of arrow 5 so that the threaded surfaces of the two parts 2 (terminal 6) and 5 coincide, and then the handle 12, the pre-move the arrow And the finger 9 to input it into the hole 8 of square section, turn in the direction opposite to the arrow B, which provides the rotation of the upper part 5 of the ball coupling and thereby twisting it on the rod 6 of the lower part 2 ball head. As soon as the thread parts 5 and 2 will be chosen before the end, both the latches 3 are in the recesses 4, which is securely fixed between the two parts 5 and 2 ball head. After that, under the action of the spring 11, the finger 9 in conjunction with the lever 12 occupies the position shown in figure 1, and the lever 12 in this position will also be fixed against rotation by the latch 13. The following describes the process can be repeated many times.

Feasibility advantage of the proposed technical solutions in comparison with the known obvious, since the coupling of the trailer hitch is more reliable.

1. Trailer hitch, the advantages to the public of a light vehicle, includes ball head, which consists of two parts: the bottom, made in one piece with the bracket trailer hitch of the vehicle and provided with a circular protrusion, and a top movably accommodated in the housing of the trailer drawbar, characterized in that the circular projection at the lower part of the ball head is made in the form of a rod with chopped it donehogawa thread, interconnected with mating threads, made in its upper part, provided at its outer end a hole of square cross section that communicates with a similar cross-section spring-loaded finger is equipped with a handle and movably mounted in the hole of the trailer drawbar, and at the end surface of the aforementioned the upper part of the ball head turned in the direction of its lower part made of at least diametrically located relative to each other two hollows hemispherical shape, in contact with the ball detents mounted on the end surface of the lower part of the ball head.

2. Trailer hitch according to claim 1, characterized in that the drawbar of the trailer in its longitudinal plane placed ball retainer, interacting with depression is made on the handle of a finger.



 

Same patents:

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FIELD: transport.

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FIELD: transport engineering.

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FIELD: transport engineering.

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