RU2816220C1 - Bridge chassis - Google Patents

Abstract

FIELD: agriculture; mechanical engineering.

SUBSTANCE: bridge chassis comprises bridge girder with four support wheels, two of which are driven, stabilizing wheels located symmetrically in front and behind support wheels, and power unit. Rear support wheels are double and are driven. Front support wheels are made rotary and controlled by lever mechanism fixed on bridge girder. Bridge girder is equipped with elements of attachment of replaceable working element of milling cultivator and operator seat. Rear support wheels of the chassis and replaceable working elements have separate drives.

EFFECT: higher mobility and stability of bridge chassis.

1 cl, 4 dwg

Description

The invention relates to agricultural machines and is intended for use in standard mechanized greenhouses when growing seedlings to perform various technological operations using replaceable working parts.

The mechanization of work in these greenhouses is carried out, among other things, with the help of agricultural machines and devices developed by the All-Russian Research Institute of Tobacco, Shag and Tobacco Products.

There is a known RF patent for the utility model “Energy Bridge Chassis” (No. 190903, published July 16, 2019, Bull. 20), containing a bridge beam with four support wheels, two of which are driven, with the size between the axes of the support wheels being 1940 mm and corresponds to the size between the axes of adjacent technological paths of the greenhouse, stabilizing wheels located in front and behind the support wheels, and an energy power unit. Replaceable working parts (hydraulic seeder, watering device, cultivator) are mounted on the chassis, depending on the performance of a certain technological operation in greenhouses. Operating experience has revealed the following shortcomings: the lack of steering control, which is necessary when moving the chassis with working bodies from greenhouse to greenhouse and across the territory of greenhouses, insufficient stability when the load on the support wheels increases when the working body - a milling cultivator - is mounted on the chassis.

The technical result of the proposed invention is to increase the mobility and stability of the axle chassis.

The technical result is achieved by the fact that in a bridge chassis, including a bridge beam with four support wheels, two of which are driven, stabilizing wheels located symmetrically in front and behind the support wheels and a power unit, according to the invention, the rear support wheels are made double and are driven, and the front support wheels are rotary and controlled by a lever mechanism mounted on the bridge beam; the bridge beam is equipped with fastening elements for the working body of the milling cultivator and the operator's seat, while the rear support wheels of the chassis and replaceable working parts have a separate drive.

In fig. 1 shows the axle chassis - side view, Fig. 2 - also front view, fig. 3 - also a top view, Fig. 4 - also view A of the lever mechanism for turning the front support wheels.

The bridge chassis includes a bridge beam 1, consisting of three longitudinal beams 2 and two transverse beams 3, which are equipped with grooves and fastening elements 17 for replaceable working parts (Fig. 3). Four racks 4 are welded to the crossbars for attaching the chassis chassis (Fig. 2). The chassis chassis has two front support wheels 5, two rear dual support wheels 6, equipped with sprockets 7, and four stabilizing wheels 8 on brackets 9 (Fig. 3), a power unit (drive) 10, consisting of an electric motor 11, a worm gear 12 and chain drives 13 (Fig. 1). To rotate the front support wheels, a lever mechanism 14 with a control lever 15 is provided. There is a removable operator's seat 16 (Fig. 4).

To achieve the technical result - increasing the stability of the chassis and reducing the load on the rear support wheels 6, they are made double by mating and are equipped with a sprocket 7. The increase in stability is caused by the need, based on the experience of operating the chassis, when equipped with a working body - a milling cultivator with a cantilever mounting of it and independent drive outside the working area of the chassis. This keeps the space of the working area unoccupied for the use of other working parts (hydraulic seeder, watering device) and simplifies the lifting of the cultivator into the transport position, improves the conditions for carrying out the technological operation, and eliminates clogging of the working area with weeds.

To achieve the technical result - increasing the mobility of the chassis due to the controlled front swivel wheels 5, they are pivotally installed in the transverse beam 3 of the bridge beam 1 and are connected to each other by a parallelogram mechanism 14 and a control lever 15 (Fig. 4). The control lever 15 allows the operator to control the chassis while sitting on the seat 16 (when installed) or moving in front of the chassis. For mounting working parts, including a milling cultivator, fastening elements 17 are provided.

The use of an axle chassis as a base platform for carrying out various technological operations in greenhouses, by changing working parts, ensures its versatility, which has an inventive step and practical significance; the novelty of the invention is confirmed by the introduction of chassis control elements in order to increase its mobility.

The bridge chassis is operated on greenhouses with a surface width of 1.3 m, formed by greenhouse slabs. The chassis moves along adjacent greenhouse technological paths formed by greenhouse slabs. The size between the axes of the support wheels of the chassis chassis is 1940 mm and corresponds to the spacing of adjacent technological tracks of a greenhouse of a standard design, taken along their axes. Replaceable working elements are attached to the bridge beam 1: a hydraulic seeder, an irrigation device, which are placed on longitudinal and transverse bars inside the chassis, and a milling cultivator installed behind the drive wheels of the chassis, each working element having its own drive. The drive 10, through chain transmissions 13, drives the support wheels of the chassis 6, moving it around the greenhouse, and the corresponding working body, from its individual drive, carries out a technological operation within the greenhouse. Centering of the chassis along the greenhouse axis during operation is ensured by four stabilizing wheels 8, rolling them along the surface of the greenhouse slabs.

Increasing the stability of the support drive wheels 6 allows you to hang heavier replaceable working parts on the chassis (for example, a milling cultivator with an individual drive), and when cultivating the soil, the operator on the seat 16 balances the center of gravity of the chassis.

Equipping the chassis with a lever mechanism to control the front support wheels allows the chassis to move from greenhouse to greenhouse without difficulty and increases its mobility.

The axle chassis was tested at the Institute's greenhouses and showed positive results.

Claims (1)

A bridge chassis comprising a bridge beam with four support wheels, two of which are driven, stabilizing wheels located symmetrically in front and behind the support wheels, and an energy power unit, characterized in that the rear support wheels are double and are driven, and the front support wheels are rotary and controlled by a lever mechanism mounted on the bridge beam, the bridge beam is equipped with fastening elements for the replaceable working body of the milling cultivator and the operator's seat, while the rear support wheels of the chassis and replaceable working bodies have separate drives.