RU2247031C2 - Method of and device for equipping row-crop utility tractor with additional traction wheels - Google Patents

Abstract

FIELD: agricultural engineering.

SUBSTANCE: according to proposed method, additional traction wheels are driven by redistributing power flow from axle-shafts of rear axle. Setting of additional wheels in operating position and retraction them into bays on rear wheel disks for traveling is carried out by shifting of rear wheels along axle shafts caused by cross component of reaction of support surface appearing at turning of rear wheel relative longitudinal axis of tractor in process of translational motion, without breaking kinematical connection in transmission. Device for setting additional traction wheels in operating position and retracting them into bays on tractor rear wheel disks is made in from of turnable side reduction units, each being formed by two articulated levers. Joint is formed by two cylinders telescopically interconnected and displaced relative to each other along screw guide.

EFFECT: enlarged functional capabilities and operation adaptability of wheeler tractor.

3 cl, 7 dwg

Description

The invention relates to the field of transport and agricultural mechanical engineering, in particular to methods of equipment with additional drive wheels of traction wheeled vehicles.

The aim of the proposed method is to expand the functionality and operational manufacturability of a wheeled tractor by equipping with additional drive wheels.

This goal is achieved due to the fact that the installation of additional wheels in the working position and return them to the technological niches of the rear wheels is carried out by moving the latter along the axle shafts caused by the transverse component of the reaction of the supporting surface that occurs when the rear wheels rotate relative to the longitudinal axis of the tractor during rectilinear movement without breaking the kinematic connection in the transmission, similarly to the work of the known device [1].

A device for implementing this method consists of rotary final drives, the housing of each of which is presented in the form of two articulated levers. The joint is made of two cylinders, interconnected in a telescopic type and moving relative to each other along a helical guide, which is a helical pair that limits the turn of the articulation levers in the range from 0 to 180 °.

Concrete example

The proposed method of equipping a universal cultivating tractor with additional drive wheels is implemented as follows. In the process of translational movement of the tractor, the tangent traction force and the rolling resistance force act on the wheels 1 (Fig. 1, a), (Fig. 2, b), provided that there is no lateral reaction of the supporting surface. If necessary, equip the tractor with additional driving wheels, switch the valve handle to a position in which oil from the hydraulic system is supplied to the hydraulic cylinder 2 (Fig. 1, b), with which, acting on the axle shaft 3, the wheels 1 are rotated symmetrically, relative to the longitudinal axis of the tractor a certain angle. The resulting lateral reaction of the supporting surface, which acting on the rear wheels 1, causes them to move relative to the tractor axles, as a result of which they disperse, they release additional drive wheels from the technological niches of their disks, which come into contact due to increased machine clearance due to the rotation of the final drives with a supporting surface.

The implementation of the contact of additional driving wheels 4 (Fig. 1, b) with the supporting surface is ensured by a device consisting of rotary final drives 2 (Fig. 2, a), the body of each of which is made in the form of two articulated levers 3 and 5 ( figure 2, a). The articulation is made in the form of two cylinders, interconnected by a telescopic type, and the movement of which relative to each other is carried out along a screw guide 6 (Fig. 3, a), made in the form of a screw pair, which limits the turn of the articulation levers in the range from 0 to 180 °. The lever 5 is directly connected to the axle of the tractor, on which the additional wheel 4 is fixed rigidly (Fig. 3, a), and the lever 3 with the hub of the large wheel 1 (Fig. 3, a). The constant transmission of torque from the drive axle to the axis of the wheel 1 is carried out through the use of splined shafts 7 (Fig. 3), on which the gears 8 are located.

When transport work, in the absence of the need to use additional drive wheels 4 (Fig.3, b), (Fig.1, c), implement the reverse process. Using the hydraulic cylinder 2 (Fig. 1, b), they act on the axle shafts by turning them at an angle to the longitudinal axis of the tractor, so that the side reaction of the bearing surface to the wheel changes its direction in the opposite direction. As a result, the gearboxes rotate backward, causing an increase in machine clearance, separation of additional drive wheels from the supporting surface, and their return to the technological niches of the rear wheel disks.

Sources of information

1. RU, 2113365 C1 60 V 17/32. The device of stepless adjustment of the track of the rear wheels of the tractor / Cherkasov A.A., Asmankin E.M., Alekseev V.N., Sokolov V.Yu. (Orenburg State Agrarian University). - No. 97107103/28; Claim 04/29/97 // Inventions (Applications and patents). - 1998. - No. 17.

Claims (3)

1. The method of equipping a universal row-tractor with additional drive wheels, in which their drive is carried out by redistributing the power flow from the rear axle axles, characterized in that the installation of additional wheels to the working position and returning them to the technological niches of the rear wheels for transportation is carried out by movement of the rear wheels along the semi-axes caused by the transverse component of the reaction of the supporting surface that occurs when the rear wheels are rotated relatively longitudinally tractor axis during translational movement, without breaking the drive connection in the transmission. 2. A device for installing additional drive wheels in the working position and returning them to the technological niches of the rear wheels of the tractor is made in the form of rotary final drives, the body of each of which is represented by two articulated levers, characterized in that the articulation consists of two cylinders connected between by telescopic type and whose movement relative to each other is carried out along a helical guide. 3. A device for installing additional drive wheels according to claim 2, characterized in that the guide is a helical pair that limits the rotation of the levers in the range from 0 to 180 °.

Images