SU672297A1 - Earth-moving machine working member - Google Patents

Description

(54) WORK BODY OF THE DIGGER MACHINE

one

The invention relates to a technique for treating and moving frozen and stony soils, and is intended to be pre-loosened during installation of trenches and trenches.

The known attachments of earthmoving machines for cutting gaps, including a frame, a disk mill and a planetary drive, are located in the inner, hermetically sealed cavity of the mill, the satellites of which are in permanent internal engagement with the gear ring, and supporting skis are rigidly fixed on the frame.

The disadvantage of this equipment is its low reliability.

The closest technical solution known is the working body of the earthmoving machine, including a frame on which central and side mills are mounted for rotation in opposite directions, which are driven by a bevel gear 2.

In this design, the main drawback is the large transverse dimensions of the working body caused by lateral low-speed bevel gears of the drive, as well as the effective use of the diametrical size of the working body when it penetrates into the developed medium. In addition, the space between side cutters is inefficiently used in the working body. The impossibility of a sharp decrease in the required moment applied to the working body leads to an increase in the size and weakening of the transmission of the working body.

The purpose of the invention is to expand the scope of the working body by reducing its transverse dimension.

Claims (2)

The goal is achieved by the fact that the cutter drive has a planetary gear containing a solar KOJieco connected to a bevel gear through a hollow shaft, an epicyclic wheel connected to a center cutter, satellites meshed with the solar and epicyclic wheels and a carrier shaft which is located inside the hollow shaft, connected at the ends C by side cutters, and in the middle part has a gear wheel connected to the center cutter by means of a closing unit of two gears and a fixed axis on which it is mounted anovlen. The drawing shows a kinematic diagram of the working body of the earthmoving machine. The working body consists of a frame 1, a central mill 2, side mills 3 and 4, a bevel gear 5, a closed planetary mechanism 6. The torque from the input shaft 7 through the bevel wheels 8 and 9 is transmitted to the hollow shaft 10 and from there to the solar wheel 11 closed planetary gear. The steep point from the sun wheel is distributed through the satellites 12 to the epicyclic wheel 13 and the carrier 14, which is rigidly mounted on the shaft of the carrier 15 for driving the side mills. The epicyclic wheel 13 is fixedly attached to the inner surface of the hub 16 of the central cutter 2. Elements 11-14 form a differential mechanism with two degrees of freedom. In order to obtain one degree of freedom and the opposite direction of rotation with different angular speeds of the center cutter relative to the side cutters, a locking link is inserted in the design as a block of gears with toothed rims 17 and 18. Its crown 17 is on external engagement with a rigidly mounted shaft 15 gear wheel 19, and the ring gear 18 is in internal engagement with the gear wheel 20, mounted on the inner surface of the hub of the Central cutter. The closing link is mounted on an axis fixed on a fixed support 21, which is attached to the frame 1 of the working body. Thus, rims 7 and 18 ensure the closure of the carrier with the epicyclic wheel, which allows to obtain a planetary mechanism with one degree of freedom. The required difference in absolute values of the angular velocities of the cutters is achieved by selecting the number of teeth of the wheels in the kinematic calculation of the gearbox. As a special case, you can get the speed of the cutter is equal in absolute value. Such a scheme of a closed planetary mechanism provides for real conditions of use of earthmoving machines the transmission of large MOSCOWS to mills with a large gear ratio, allowing us to perform a compact bevel gearbox in a single unit with a planetary mechanism, placing the entire drive in the space between the side mills. Thereby, the transverse dimension of the working body is sharply reduced and the weight of its transmission is reduced, the working body can be used both in trench and slit-cutting digging machines. The invention The working body of the earthmoving machine, comprising a frame on which central and side cutters are mounted for rotation in opposite directions, the drive of which has a bevel gearbox, characterized in that in order to expand the scope of the work body by reducing its transverse dimension, the drive the cutter has a planetary gearbox containing a solar wheel connected to a bevel gearbox via a hollow shaft, an epicyclic wheel connected to the center cutter, a satellite which engages with the sun and epicyclic wheels, and the carrier, whose shaft is located inside the hollow shaft, is connected at the ends to the side cutters, and in the middle part has a gear wheel connected to the center cutter by means of a closing unit of two gears and a fixed axis, on Jkotopy it is installed. Sources of information taken into account in the examination 1. USSR author's certificate number 186337, cl. E 02 F 5/30, 1972. 2. USSR author's certificate number 431285, cl. E 02 E 5/30, 1972.