Trailer hitch multi-tier transport trains

 

(57) Abstract:

The invention relates to transport machinery and can be used to improve performance of multi-tier transport trains by increasing safety performance, maneuverability. Trailer hitch consists of a hydraulic cylinder rigidly connected to the trailer drawbar with hydraulic system, consisting of a valve, pump, accumulator tank, while TSU has an Autonomous system of drive wheels rotatable bogie axle with electric control from the control unit with energy sensors and rotation, and included in the overall electrical system of the tractor, the sensor is the smallest length that is located on the cylinder; in all cases, the sensors close the field circuit of the generator (winding of the power supply to the electromagnetic clutch, which zapisywanie electromagnetic power clutch. The technical result is to increase the stock lateral stability of the transport train when moving along a curved trajectory in different complexity conditions. 4 Il.

The invention relates to a transport machine building.

Known traction-coupling is of drollinger, connected by pipelines with the master cylinder by a closed-loop scheme, the plunger actuating hydraulic cylinder performs the movement of the slats to the four-link mechanism of the tiller.

The disadvantage of this device is the presence of a large number of hinge joints and unreliability gears, increased resistance to turning circle (see ed. St. N 1703497, MKI B 60 D 1/145).

Closest to the proposed device is a trailer hitch comprising two series-connected Executive bodies in the form of two hydraulic cylinders with spring-loaded rods, provided with throttling holes in pistons, solenoid valve, the threshold sensor inertial forces are included in the circuit controlling the valve, a valve regulating the flow cross section of the drain line.

The disadvantage of this device is that it has no autonomy of action especially for trailers, located away from the main power units. Also a disadvantage is the constant drive of the pump of the hydraulic system regardless of the frequency of use of the device, and therefore, a high index of time in holotescu the objective of the proposed device is improved performance in multi-tier transport trains due to the changing dynamic and kinematic parameters TSU.

The task is achieved by the fact that the trailer hitch multi-tier transport trains containing a hydraulic cylinder rigidly connected to the drawbar of the trailer and provided with a spring-loaded valve with throttling holes, the hydraulic system with electromagnetic control valve, when the transmission of torque from the wheels starting turning bogies or when the alarm threshold sensor under the critical action of centrifugal forces of inertia, hydraulic fluid is supplied under pressure into the cylinder chamber, changing kinematic parameters of trains, increasing agility, reducing shock loads, and at the exit of turn TSU returns to the original relevant parameters.

Construction analysis TSU compared to the prototype allowed us to conclude that the claimed technical solution has novelty, because it is independent from the tractor drive; the Executive body, made in the form of one cylinder, and has a set of independent sensors.

The presence of the invention, the proposed solution is demonstrated by the fact that in this trailer hitch in contrast to existing constructions can be integrated regulation is regardless of the hydraulic system of the tractor.

The technical solution is illustrated by the drawings:

Fig. 1 - General view of the trailer with the location of the hitch and control system.

Fig. 2 - schematic diagram of the hydraulic system hitch.

Fig. C - control system.

Fig. 4 - rotation sensor.

The hitch consists of a cylinder 1, through which the shaft 2 is connected with the trailer 3, the hydraulic system consisting of hydroreservoirs 4, gear pump 5 relief valve 6, hydroaccumulator 7, valve 8, valve 9 which is spring-loaded by a spring 10 and changes its position when turned on pulling the windings 11 and 12, which are included in the equipment trailer. Closure occurs under the action of the inertial sensor 13 and the rotation sensor 14. These sensors close the field circuit of the generator 15 of the drive system.

The drive system consists of wheel bogies 16, through which the shafts 17, conical differential 18 and the main transmission 19 convey torque to the generator 15 and the master disk 20, the electromagnetic clutch 21, and the generator 15 and the disk 20 are mounted on the same shaft. The clutch disc 22 of the electromagnetic clutch 21 is mated one shaft with gear pump 5 hydraulic and peredach turning 13 consists of a Cam disk 24 with the spring loaded lever plunger 25 and a pair of contacts 26, and is fastened to the differential case 18, and the drive is provided with a roller 27. Inertial sensor 13 on the device similar to a known sensor design (ed. St. N 1566918, class B 60 T 7/12,8/24). The device has a sensor the smallest length trailer hitch 28 with the contact 29, and the control unit are closing the contacts 26 of the rotation sensor 14, the contacts 30 of the inertial sensor 14, and normally closed contacts 31 of the sensor 28 is the smallest length of the hitch and the contacts 32 of the rotation sensor 14. The cylinder is divided into the cavity 33 and 34, which are connected throttling holes 35.

The device works in the following way:

During the rectilinear motion device is in the initial state: the piston of the hydraulic cylinder 1 is in the floating position, in the case of dynamic loads, the fluid flows from the cavity 33 in the cavity 34 and back to the tank through a valve 8, and partially through the throttling holes 35 in the piston, with load peaks are smoothed out by converting the kinetic energy of the trailer in the heat. When increasing the length of the hitch above the permissible sensor triggers the smallest length trailer hitch 28, closes the excitation circuit of the generator 15 and the torque from the wheels prichlenyaet, until you open the contact 29 of the sensor is the smallest length of the hitch 28.

In turn actuates the rotation sensor 14, which has a free running angle (5 degrees), this completes the circuit of the generator 15, which depending on the speed of movement produces a corresponding force on the current in a given interval. Proportional to this current is the torque to be transferred from the master to the slave shaft of the electromagnetic clutch 21 and forth on the shaft of gear pump 5. The number of revolutions on the driven shaft and the value of MK depends on the strength of the current produced by the generator 15. When triggered, the rotation sensor 14 closes the circuit of the control valve 8 and the valve 9 under the action of the retracting force of the coils 11, 12 changing the floating position to the position corresponding to the injection of fluid into the cavity 34, creating stem force slowing it down trailer parts train, as well as increasing the kinematic length of the hitch, which increases the maneuverability of the train. As soon as the magnitude of the inertia force becomes higher than the critical value there is a threshold of inertial sensor 13 and opens the control circuit of the coil 12. The spool 9 of the distributor holds the position at which the cavity 34 is connected with Magistral the energy accumulated hydroaccumulators 7, allows you to create the necessary time steps and the magnitude of the force on the rod to counteract the tipping trailer inertial forces. By reducing the magnitude of inertial forces open the contacts 30 of the inertial sensor 13 and the closed contacts 32 of the rotation sensor 14, the contacts 31 are open from being a lever plunger 25 in position of rotation. The valve changes position and the fluid begins to build up in the cavity 34, while continuing to increase the length of the hitch until such time as the trailer will not turn, this opens the circuit of the rotation sensor 14 (pin 26) and closes the sensor circuit 28 is the smallest length of the hitch, which returns the hitch in its original position, in which the kinematic length of the device corresponds to the optimal rectilinear motion of the train.

We offer trailer hitch in comparison with existing analogues has several advantages, expressed that this hitch allows you to create multi-tier transport trains that meet the requirements of safety, maneuverability, controllability, stability, and also has good performance in speed, maneuverability.

Trailer hitch mn is a spring-loaded valve with throttling orifices, the hydraulic system with electromagnetic control valve, characterized in that it is equipped with sensors of inertia and rotation located in the control unit, the sensor of the smallest length trailer hitch located on the hydraulic cylinder, the Autonomous drive system from the trailer wheels through shafts, bevel differential and main gear, which is the main nodes of the rotary axis of the trailer, and the electromagnetic clutch is energized with current from a generator located on the shaft of the main transmission.

 

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4 dwg

FIELD: transport engineering; trailer-trains.

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2 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to coupling gears of trailer-trains for use in cases when large vehicles are to be coupled for operation off road and on heavy terrain. Proposed coupling gear of trailer-train consisting of prime mover and trailer contains semi-frames for fastening coupling gear members, front one installed in bushing rigidly connected with semi-frame of prime mover and rear one installed in cylindrical cup and rigidly connected with semi-frame of trailer, and tie-rods interconnected by connecting link. Said connecting link is made in form of cross with displacement relatively perpendicular axles whose vertical diametrically arranged pins are coupled with rear tie-rod, and diametrically arranged horizontal ones, with front tie-rod. Said bushing is furnished with pilot-controlled check valve for fixing extreme points of horizontal displacement of front tie-rod. Hydraulic shock absorbers are hinge-secured on semi-frames of prime mover and trailer, being coupled with pilot-controlled check valve and located higher than upper point of hinge turning of tie-rods. Moving part of hydraulic shock absorber exceeds value of longitudinal displacement of front tie-rod.

EFFECT: improved reliability, increased service life and maneuverability when negotiating heavy obstacles, increased angle of turning of coupling gear.

3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to transport engineering, namely to trailers hitch mechanisms. Multifunctional trailer hitch mechanism comprises coupling element, rigidly coupled with crossbar provided with thrusts and locking device, symmetrically arranged relative to tie-rod longitudinal axis, each of which is made in form of hydraulic cylinder. Tie-rods first ends are articulated with crossbar, and second are with trailer front axle. Device is additionally equipped with electronic control unit, hydraulic cylinders piston and rod cavities electric windings, hydraulic cylinders windings control busbar, hydraulic cylinders piston and rod cavities shielding. In device hydraulic system magnetorheological fluid is used as working liquid instead of oil.

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1 cl, 2 dwg

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