RU2224848C2 - Device for solid soil loosening - Google Patents

Abstract

FIELD: building equipment, particularly for layer-by-layer solid soil loosening and for asphalt concrete coat removal during highway and pavement repair. SUBSTANCE: device has frame with roller installed by rotation support in frame. Teeth and drive are connected to roller. Device has holder fixedly attached to roller. Tooth-wheels with unbalances and tooth-wheel drive are mounted on holder by rotation support. Unbalances are engaged with tooth-wheel located on shaft by rotation support. EFFECT: increased efficiency. 2 dwg

Description

 The invention relates to construction and may find application for layer-by-layer cultivation of strong soils, as well as removal of asphalt concrete pavements in the repair of roads and sidewalks.

 A device for layer-by-layer cultivation of strong soils, including a frame, a working body with teeth and a vibro-shock mechanism [1].

 Closest to the proposed technical essence is a device for milling soils when creating asphalt concrete pavement of roads, containing a frame on which a shaft with teeth fixed to it and a shaft drive are installed in the rotation supports [2].

 A disadvantage of the known device is the significant load on the cutting teeth when working on strong soils and the high energy consumption of the process of loosening.

 The purpose of the invention is to increase the efficiency of loosening and reduce the energy intensity of the process of loosening the soil by the described device.

 This is achieved by the fact that the bracket is rigidly fixed on the shaft, on which gears with unbalances are mounted, which engage with the gear mounted on the shaft in the rotation bearings, and the gear drive.

 In FIG. 1 shows a device for loosening strong soils, a General view; in FIG. 2 is a sectional side view of the device.

A device for loosening strong soils contains a frame 1 on which a shaft 2 with teeth 3 fixed to it is mounted on rotation bearings, a drive 4, which is connected to the shaft by an elastic coupling 5, an arm 6, rigidly fixed to the shaft with axles 7, on which the bearings to rotate, gears are mounted with unbalances 8 engaged with gear 9 mounted on shaft 2 in rotation bearings, gear 10 of gear 9 and casing 11. For loosening the soil, frame 1 is hung on the base machine (tractor, grader, tow hitch) with cart ozhnostyu provide the desired contact with the developed solid ground, activated 4 drive shaft 2 and the drive gear 9, 10, whereupon the base machine starts moving. The teeth 3, rotating with the shaft 2, alternately come into contact with the developed medium. The gear wheel 9 drives the unbalance wheels 8, which create a centrifugal force:
F _C = m • e • ω ² ,
where m is the mass of rotating unbalances;
e - eccentricity;
ω is the angular velocity of rotation of the unbalance.

где D_о-диаметр расстановки осей дебалансов.Under the influence of this disturbing force, torsional vibrations of the shaft 2 occur together with the teeth 3 fixed on it. The magnitude of the dynamic moment causing these oscillations:

where D _{about the} diameter of the alignment of the axes of the unbalance.

Therefore, at the moment of interaction of the tooth with the soil, which is carried out by the main drive 4, the moment from torsional vibrations T _{ding is} added. Since T _din varies according to the harmonic law, the tooth during cutting will perform harmonic vibrations, i.e. vibrates, as a result of which its friction against the soil on knives decreases, and the cutting edges interact with the soil in the frequency-shock mode, as a result of which especially fragile soils are destroyed much more easily than with static destruction. The elastic coupling 5 serves to protect the actuator 4 from additional dynamic loads. The casing 11 protects the gears from dust.

 The application of the invention will not only increase the efficiency of the milling cutters, but also significantly reduce the energy consumption of milling strong soils, while the effect increases with increasing brittleness of the soil.

Sources of information
1. USSR author's certificate 296869, M. Kl. E 02 F 5/30, 1968.

 2. Borodachev I.V. Handbook of the designer of road cars. - M.: Mechanical Engineering. 1965 - 725 s. RU 2135703, 08.27.1999, E 02 F 5/32.

Claims (1)

A device for loosening strong soils, comprising a frame on which a shaft with teeth fixed to it and a shaft drive is installed in the rotation bearings, characterized in that the bracket is rigidly fixed to the shaft, on which gear wheels with unbalances are engaged, which engage with a gear mounted on a shaft on a rotation support, and a gear drive.

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