SU899919A1 - Control device of working member of excavating machine - Google Patents

Description

one

The invention relates to the mining industry, namely, to excavating narrow-grip combines, and can be used in the creation of mining complexes.

Devices are known for controlling the executive bodies of coal-mining units in a vertical plane, including an actuator and a hydraulic jack with a hydraulic shock absorber, the brush of which is rigidly connected with the hydraulic jack 1.

A disadvantage of the known devices is that the actuator is significantly shifted relative to the supports.

Owing to the waviness of the soil of the formation, adjusting the position of the executive body of the combine in height and other reasons, the bottomhole conveyor bends in the vertical plane during operation. When the combine is moved along such a guide, the executive body copies its profile outside, closes in the soil and roof.

The closest in technical essence to the present invention is a device for controlling the executive body of the excavation mask, including a housing

machines-, bracket, swivel gearbox with the executive body, power hydraulic cylinder, the rod of which is pivotally mounted on the body, hydro-holders and copier 2.

A disadvantage of the known device is the low accuracy of the control of the formation of the hypsometry of the formation.

The purpose of the invention is to improve the accuracy of control over the formation hypsometry.

This goal is achieved by the fact that the device for controlling the executive body of the excavation machine, including a rotary gearbox, a control hydraulic cylinder, the stem of which is pivotally mounted on the machine body, a hydraulic pump and a copier, is equipped with an additional control hydraulic cylinder, a lever and a feedback hydraulic cylinder, with In this case, the control cylinders are rigidly interconnected, and the additional cylinder of the hydraulic cylinder is pivotally connected to the swivel gearbox,

Claims (2)

20 is coaxially with which a lever is articulated at one end, having a copier at the other end, the lever being connected by means of a transmission mechanism to a hydraulic shaft, the casing of which is rigidly connected to the feedback hydraulic cylinder rod. FIG. 1 shows a notching machine, top view; in fig. 2 - hydromechanical scheme of the proposed device. On the body of the excavation machine 1, the lever 4 is coaxially aligned with the swivel gearbox 2, on which the actuator 3 is mounted. At the other end of the lever 4 is a hinged copier 5, rolling along the rail b, which moves the excavation machine 1. Through the transmission mechanism 7, the lever 4 acts on the valve of the throttling hydraulic distributor 8 (the following valve) connecting the pressure 9 and drain 10 hydraulic lines through the hydraulic lock 11 with the working cavities of the additional control hydraulic cylinder 12, the rod of which is hinged union of a rotary gear 2 and Base- rigidly with the control cylinder housing 13. The rod of the hydraulic cylinder 13 is pivotally mounted on the body of the excavation machine 1. The housing of the throttling valve 8 is rigidly connected to the stem of the hydraulic cylinder 14 of the hydraulic feedback. The device works as follows. The change in the profile of the formation of the guide 6 is transmitted through the copier 5 to the horn of step 4. This changes its position in space, which is transmitted through the transmission mechanism 7 (for example, a gear wheel - rail) to the throttle valve of the hydraulic distributor 8. The working fluid from the pump is via a pressure hydraulic line 9 through the hydraulic lock 11 enters the additional control hydraulic cylinder 12, moving the actuator 3 down. The working fluid pushed out at the same time enters through the hydraulic lock 11 and the throttling valve 8 into the rod cavity of the hydraulic feedback cylinder 14, through the rod of which the valve junction 8 moves along the valve, eliminating the resulting misalignment. Thus, the movement of the executive body 3 corresponds to the movement of the copier 5, and therefore, the profile created by the working executive body 3 corresponds exactly to the profile of the guide 6. If necessary, a change in the position of the executive body 3 triggers the hydraulic system controlling the position of the executive body 13 management Such a hydraulic system is equipped with modern excavation machines, for example, KSh-3, KSh-ZM, 1GSh-68 and others. . The proposed device improves the control accuracy of the excavation machine in terms of the hypsometry and the thickness of the formation by copying, by the executive bodies of the combine, the profile of the guide along which the excavation machine moves. This is achieved by placing the executive bodies opposite the "false supports of the excavating machine, which are the copiers on the levers. In addition, the use of this device will simplify the work of the machinist and create conditions for deserted coal excavation, increase labor productivity in the lava, will create a smoother soil profile of the reservoir, which will improve the condition of shifting the complex. Apparatus for controlling the executive body of the excavation machine, including a rotary gearbox, a control hydraulic cylinder, the brush of which is hingedly mounted on the machine body, a hydraulic axle, a hydraulic pump and a copier, characterized in that in order to improve the control accuracy of the formation hypsometry, a lever and a hydraulic feedback cylinder, while the control hydraulic cylinders are rigidly interconnected, and the additional hydraulic cylinder shafts are hingedly connected to orotnym gear, coaxially with which one end is pivotally fastened to it a lever having a cam at the other end, wherein the lever is coupled through a transmission mechanism with gidrozolotnikom whose body is rigidly connected to the rod of the hydraulic cylinder feedback. Sources of information taken into account in the examination 1. USSR author's certificate number 496363, cl. E 21 C 27/02, 1973. 2. USSR author's certificate number 431304, cl. E 21 C 27/00, 1972.