Adjustment device of position of ballast weight on tractor semi-frame

FIELD: machine building.

SUBSTANCE: adjustment device of ballast weight position includes transmitter of tractor front axis (1) unloading. Transmitter is made in the form of an electric force-measuring pin with electronic control unit (2), into which the required sensitivity level of front axis (1) unloading transmitter is programmed. When the tractor front axis is unloaded above allowable level, transmitter supplies the signal to electronic control unit that generates a control signal and supplies it to electric hydraulic valve (10). Electric hydraulic valve is connected on one side to hydraulic cylinder (7), and on the other side via hydraulic lines (12) and (13) to pressure line of hydraulic system of tractor and drain line. Depending on the signal supplied to electric hydraulic valve (10), hydraulic cylinder (7) connected to it moves beam (4) with ballast weight (6) now in tractor movement direction, and then to initial position.

EFFECT: invention allows increasing the stability of straight-line movement, improving the controllability of hinged tractor unit, improving the uniform distribution of vertical loads on supports of the unit and improving sensitivity of the system actuation.

2 cl, 3 dwg

 

The invention relates to tractor engineering and can be used when operating the tractor with heavy mounted or semi-mounted agricultural machine.

Known tractor equipped secured to its frame by a hydraulic cylinder and guides. The piston rod of the hydraulic cylinder is connected to the bracket for movement in said guides. The working cavity of the above-mentioned hydraulic cylinder is connected with the drive mechanism of the rear hinge. To secure the repayment of the bracket with corrugatedes to its original position, the piston rod of the cylinder is accomplished by a spring-activated (description A.S. USSR №734051, IPC3B62D 49/08). Well-known design provides automatic zagrozenia tractor front wheels depending on the vertical load acting on the mechanism of the rear hinge.

The disadvantage of the design is that the load on the front axle of the tractor is regulated by indirect parameter.

A device to control the traction mechanism support frame of the tractor, containing the hydraulic regulation of the length of the top link, cavity through which the hose with locking elements is in communication with the first and second lines of the three-position four of the valve. The third and fourth lines are connected respectively to the pump and drain hose. The output element of the job position is of the valve is connected with the governing body. To improve traction properties of the articulated tractor and its control by regulating the distribution of the normal load during transient modes of motion, the element to set the position of the valve is made in the form of sensor normal load wheels of the tractor and the valve is made with fixation in the initial position in the first position, the housing of the valve is kinematically connected with the rod of the hydraulic cylinder control the length of the top link (the description of the patent RF №2033009 A01B 63/10).

The disadvantage of this device is too complex the design, the load on the front axle is adjusted by indirect parameter, and that the sensor normal load on the front wheels hydraulically connected to Bolotnikova device that tightness affects the quality of regulation load on the front axle.

Known tractor, comprising a sensor unloading the front axle, kinematically associated with Bolotnikova device, and corrugating front wheels with counterweight and hydraulic cylinder. The sensor unloading the front axle hydraulically connected through the spool device corrugatedes front wheels with a counterweight, located directly on the axis (the description of the patent RF №2310504, B62D 49/08, A01B 49/00).

The disadvantage of this design is the construction is too complicated design.

The objective of the invention is a device that regulates the position of the ballast cargo located on the end of the tractor.

The technical result is increased stability of the rectilinear motion of the hinged tractor unit, improve manageability, increase the uniformity of distribution of the vertical loads on the supports of the unit, increasing the sensitivity of the actuation system, simplifying the design.

The technical result is achieved in that the device for adjusting the position of the ballast of the goods at the end of the tractor, comprising a sensor unloading the front axle, a sliding device with a beam and directing, as well as cargo and ballast cylinder sensor unloading the front axle is made in the form of electrical load of the finger with the electronic control unit, connecting the end with the front axle of the tractor and connected with electrohydrodynamical connected to the hydraulic cylinder retractable device, with beam guide retractable devices are spring-loaded.

Figure 1 shows the installation position of the sensor unloading the front axle of the tractor; figure 2 shows a General view of the tractor, top view; figure 3 is a view along arrow a in figure 2.

The device includes a sensor unloading the front axle of the tractor 1 representing electrical siloism the note of a finger with an electronic control unit (ECU) 2 and which connects the section 3 with the front axle of the tractor 4. To section 3 of the tractor mounted retractable device with the beam 4 and the guide 5. The beam 4 is fixed ballast weight 6, and it is connected with the rod of the hydraulic cylinder 7. The sensor unloading the front axle 1 by electric lines 8 connected to the ECU 2. The ECU 2 via the electrical line 9 is connected with electrohydrodynamical 10, which in turn with one hand on the hydraulic connection 11 is connected to the hydraulic cylinder 7, and on the other side of the hydraulic lines 12 and 13 respectively with the pressure line of the hydraulic system of the tractor and the drain line. Beam 4 retractable device via a return spring 14 is connected with the guides 5.

The device operates as follows.

When the tractor mounted agricultural machinery tractor using the ECU 2 sets the desired sensitivity of the sensor unloading the front axle of the tractor 1. From theory of tractor it is known that to maintain satisfactory response is necessary that the load on the front axle of the tractor was not below 15...20% of its operating weight. These data can be used when programming the ECU to check the degree of unloading the front axle of the tractor. In the process, hinged tractor unit is always a redistribution of vertical loads on the supports, which is associated with the movement over bumps, Perevedentseva instruments in the transport position and back, acceleration and deceleration and other factors. When unloading the front axle of the tractor over the permissible limit sensor 1 generates the error signal to the ECU 2, which produces a control signal and sends it to electrohydrodynamical 10. The slide valve electrohydraulically 10 moves and connects the pressure line 12 of the hydraulic system of the tractor to the hydraulic cylinder 7 retractable device. The oil flow from the hydraulic pump 15 through line 12 through electrohydrodynamical 10 is directed into the hydraulic cylinder 7. The piston rod of the hydraulic cylinder 7 starts to move and to move the beam 4 in ballast cargo 6 forward in the direction of travel of the tractor. Due to increasing shoulder and as a consequence increasing time from the action of the ballast cargo load on the front axle of the tractor starts to increase. This will contribute to the reduction of the error signal in the sensor 1. In the absence of the error signal sensor 1 supplies the electric signal to the ECU 2, and that in turn on electrohydrodynamical 10. The slide valve electrohydraulically 10 is moved in the opposite direction and provides communication of the hydraulic cylinder 7 with the drain line 13. However due to the action of the return spring 14 beam 4 with the ballast load 6 will begin to move along the guides 5 back in the direction of travel of the tractor in the second original position.

The proposed device allows to increase the stability of the rectilinear motion, improve manageability mounted tractor unit, to improve the uniformity of distribution of the vertical loads on the supports of the unit, to increase the sensitivity of the alarm system.

1. Device for adjusting the position of the ballast of the goods at the end of the tractor, containing the sensor unloading the front axle, a sliding device with a beam and directing, as well as cargo and ballast hydraulic cylinder, characterized in that the sensor unloading the front axle is made in the form of electrical load of the finger with the electronic control unit, connecting the end with the front axle of the tractor and connected with electrohydrodynamical connected to the hydraulic cylinder retractable device.

2. The device according to claim 1, characterized in that the beam guides retractable devices are spring-loaded.



 

Same patents:

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