Trailer hitch for car


(57) Abstract:

Usage: in vehicles, in particular in the construction trailer coupling devices of motor vehicles. The inventive device includes a support sphere 2, which is fixed to the longitudinal beam 7. The latter is rigidly connected to the cross bar 6 by two triangular brackets 8. Each bracket 8 is made accordingly to ensure manufacturability. The socket 14 is installed on the flap 13, which is connected to the cross bar 6. 5 Il.

The invention relates to vehicles, particularly to a towing device for vehicles used for towing cargo platforms, mobile cottages, etc.

There is a construction trailer hitch, containing the shaft, pivotally mounted on a swivel truck trailer made with the possibility of moving along it and is associated with a support fastened to the frame of the car.

The disadvantage of this device is that it does not have sufficient workability in the manufacture.

You know trailer hitch of the vehicle, based on the mounting flange of the traction-capista, installed on the car (the rear part of his body), is that it does not provide the required safety and manufacturability of the design while manufacture.

Known closest to the invention by the technical nature towing device containing the longitudinal and transverse beams, longitudinal of which is mounted a hitch ball.

The disadvantage of this technical solution is the lack of adaptability.

The purpose of the invention is the improvement of manufacturability, improved availability and decrease in the length of the welding seams.

This goal is achieved by the fact that the transverse beam attached to the longitudinal beam by two triangular brackets with the same geometrical dimensions positioned at the angle of 35-55aboutto the cross beam and symmetrically from the longitudinal beams and interacting with her lower legs and cross beam deflected by 1/3-1/2 narrowing parts, 1/3-1/4 covering her, and the arms have holes spaced equidistant from beams and interacting with a safety bolt, and the box mounting socket connector is located near the I; in Fig.2 - parts prior to Assembly; Fig.3 - power bracket and scan; Fig.4 is a view along arrow a in Fig.3; Fig.5 - trailer hitch on the car.

Trailer hitch for passenger vehicle 1 includes a control field 2, mounted on a bent pin 3 connected with the flange 4, is fastened to the rear of the bottom panel 5 of the vehicle body.

The transverse beam 6 is bonded longitudinal beam 7 by two triangular brackets 8 with the same geometrical dimensions positioned at the angle of 35-55aboutcross beam 6 and symmetrically from the longitudinal beams and interacting with her lower legs 9 and transverse beam deflected by 1/3-1/2 narrowing parts 10, 1/3-1/4 covering it, and the brackets are provided with holes 11 located equidistant from beams and interacting with a safety bolt 12, the plate 13 of the mounting plug connector 14 is located near one of the brackets.

The drawings also indicated harness wiring 15 is connected to the electrical circuit of the vehicle, a threaded sleeve 16, the mounting bracket 17, the mounting box 18, the bolts and nuts securing the device to the back of the bottom panel 5 of the body autoosta as follows.

In slipway that are not shown in the drawing, set the longitudinal beam 7, the transverse beam 6.

To the longitudinal beam can be pre-attached by welding reference area 2, mounted on a bent pin 3 with the flange 4, a semicircular mounting bracket 17, the mounting box 18.

To the end of the transverse beams 6 are welded threaded sleeve 16, in which the stocks are used for fixation of the beam 6.

A sufficient condition for the Assembly of the trailer hitch is installed and fixed by welding, for example, electric arc, two triangular brackets 8 communication beams between them.

Previously from a sheet material made of billet 20 length L (Fig.3) brackets 8.

Bored holes 11 for the safety bolts 12 and using a press, to form bent on 1/3-1/2 of the total length of the narrowing part 10 of the brackets.

The magnitude of the bent portion 10 of the bracket 8 determines the length of the weld on the cross beam 6 and the smallest cross-section mating with the beam, i.e. the strength of the structure.

The bending of the end of the bracket is less than 1/3 length, dramatically increases the voltage in a dangerous section.

The bending of the end bracket over Agneta part 10 of the bracket 8 when the connection is welded to the cross bar 6 interfaces without surge voltage at the transition from the beam 6 to the bracket 8.

The location of the triangular bracket 8 with the same geometrical dimensions angle of 35-55aboutcross beam 6 and symmetrically relative to the longitudinal beams 7 to facilitate manufacture of the brackets 8, because they can cut down on mechanical scissors, tape, used for bending narrowing part 1/3-1/2 the length of one stamp.

Supply bracket hole 11 and its location equidistant from the beams 6 and 7 allows one punch from the workpiece, the scanner 20 to use for both left and right brackets.

The location of the brackets 8 at an angle less than 35aboutwith respect to the cross beam 6 is not advisable due to the sharp increase in the length of the bracket, its mass.

In the present embodiment, the bracket 8 is located at 45about.

The location of the brackets 8 at an angle of more than 55aboutwith respect to the cross beam 6 is also not appropriate, because the brackets are close relative to each other, making it difficult to bond them welded to the beams 6 and 7, furthermore, it turns out, weakened tab bent narrowing part 10 because of straining metal.

When the angle 90aboutbrackets rashayda bent part 10, and material thickness must be increased, however, there is a jump of the stress at the transition from the beam 6 to the brackets, which is undesirable. Bent narrowing part 10 covers the transverse beam 6 at 1/3-1/4 of its diameter, which is provided by the punch. Covering more than 1/3 is not advisable, because it is more difficult to perform punch, the material thins and may even be torn, it will not provide the necessary strength. Covering less than 1/4 is also not advisable, because turn out insufficient contact patch and the length of the welding seam.

Under normal footprint achieved by reducing the surge voltage at the transition from the transverse beams 6 to the triangular brackets 8.

Belay bolts 12, which is used for coupling of the trailer to the towing device can be installed to bond beams triangular brackets 8.

After installation of the flap 13 of the attachment plug 14 near one of the brackets 8, the device is assembled. The flap 13 can be set on the spot welding.

Installation on the vehicle device is as follows.

With the use of fasteners, i.e. bolts Wai longitudinal beam 7 relative to the transverse beams 6 adjust the bracket 17 and box 18 to the panel 5 of the body so to their surfaces without gaps pressed against the bottom panel of the body. Mark the mounting holes in panel 5 of the body, drill, install the bolts, tighten to the specified torque. A sufficient condition for the installation of devices is specified tightening torque of the fastening elements.

The operation of the device is as follows.

The curvature of the longitudinal beams 7 and pin 3 should be of such size to provide the necessary height of the reference sphere from the earth that is provided and the respective sizes of the two brackets 8.

Fix lock towed device on the sphere 2. Additionally, using bolts 12 or studs, attach a safety device in the form of chains, wire ropes, which prevents the disconnection of the trailer failure castle towed device.

On the reference sphere 2 are the static and dynamic loads. Vertical load for the trailer weight 500 kg 32 kg. Loads are transferred from the reference sphere 2 on its curved pin 3, the flange 4 and the beam 7.

Since the beam 7 is bonded by welding to the beam 6, the effort is redistributed between them depending on their stiffness (beams and two brackets 8).

Cha is Alka 7 passes back panel 5 of the vehicle body through the bracket 17 and box 18.

Triangular brackets 8, in addition, reduce the surge voltage when the transmission of forces from the reference sphere 2, bonded to the cantilever part of the beam 7, the transverse beam 6 and several times longer cantilever portion of the beam 7.

If you have network problems between the beams 7 and 6, the device remains operational, but begins yaw rate of the vehicle on the road, forcing the driver to stop and correct any malfunction.

Trailer HITCH of an AUTOMOBILE containing the reference sphere set on a bent pin on the free end of which is fixed a flange rigidly connected with the longitudinal beam, which is made with possibility of installation on the vehicle and rigidly connected with made with the possibility of attaching to the vehicle transverse beam, characterized in that the beams are interconnected by two triangular brackets, one of corner portions of each of which is located opposite the lower side of the triangle, bent over a length equal to 1/3 to 1/2 of the height of the triangle, made this concave with coverage crossmember 1/4 1/3 the size of the perimeter of its cross section, and the smaller triangle based , the brackets are made with holes that are equidistant from the rafters and have the opportunity to interact with their surfaces with a safety bolt, with plug connector is installed on the flap, which is rigidly connected to the cross bar.


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