SU831914A1 - Hydro-mechanical system for controlling the position of working member of road-building machine - Google Patents

Description

(54) HYDROMECHANICAL CONTROL SYSTEM FOR THE POSITION OF THE WORKING BODY OF ROAD CONSTRUCTION MACHINE

The purpose of the invention is to increase the reliability of work.

This goal is achieved by the fact that the distributor case is provided with a shank installed with the possibility of longitudinal movement coaxially with the spool, the pusher being connected to the spool by means of a screw connection and made with edges for interacting with the distributor case.

In addition, the shank and spool are connected by means of springs and are made with end splines.

Fig. 1 schematically shows the hydromechanical control system of Fig. 2, the distributor, section along the axis of the spool; Fig, 3 is a section bb In Fig.2; figure 4 - section aa in Fig, 2.

The hydraulic distributor 1 of the hydromechanical control system is mounted on the remote bracket 2 by means of the height adjustment device 3. The probe 4 distributor interacts with the copier 5,

The distributor consists of a housing 6, in which a spool 7 and a pusher 8 are mounted, connected to each other by means of a screw connection 9, the plunger being made with facets 10, and the spool with an end spline 11. In the distributor case, there is a cam roller 12 which is at risk. 13 corresponds to the maximum eccentricity of the cam, KPONK addition, the distributor housing is equipped with a shank 14 with a face, slot ISi A spring 16 is installed between the shank and the spool. A scale 17 is fixed on the distributor housing, scaled in units of sensitivity.

The distributor is attached to the working body and is hydraulically connected to the hydraulic cylinder controlling the position of the working body.

The device works as follows.

When moving the machine probe slides on the copier. When the working body of the machine deviates from a predetermined position, the probe rotates the roller 12, as a result of which the pusher 8 moves and displaces the slide from the neutral position, while the working fluid enters the actuating hydraulic cylinder, either lifting or lowering the operating body before setting to the specified position occurs.

The sensitivity adjustment of the hydromechanical control system is as follows.

Roller 12 is rotated to align risks 13 with the desired sensitivity value on a scale of 17. The spool is then set to the neutral position. For this, the shank 14 is embedded in the body prior to engagement with the spools of the spool and rotates around its axis. As the shank rotates, the spool rotates. Depending on the direction of rotation of the spool, the pusher, the faces of which, in contact with the facets of the housing bore, prevent its rotation, is screwed into the spool, the VLJiK is unscrewed from it,

By this, the spool moves along its axis until it is set to the neutral position. The neutral position of the spool is determined by the absence of movement of the actuating hydraulic cylinder and, when the system is turned off, by air blowing. If necessary, after adjusting the system to the specified sensitivity, the probe can be rotated relative to the roller

and set to any desired position.

The slide and pusher have drainage holes,

The application of the proposed device provides adjustment system

by moving the spool relative to the pusher.

invention formula

1, Hydromechanical control system of the position of the working body of the road-building machine, containing a hydraulic distributor,

5 including spool associated with

a pusher, a spring and a roller with an eccentrically mounted subdiapnik for interacting with the pusher, a probe fixed at the end of the roller and a trocator, characterized in that, in order to increase the reliability of operation, the distributor case is equipped with a shank mounted with the possibility of longitudinal movement the spool, the pusher being connected to the spool by means of a screw connection and made with faces to interact with the distributor case,

2, a system according to claim 1, characterized in that the shank and the valve are connected by means of a spring and are made with face splines. Information sources,

5 taken into account in the examination

1, Schedrovitsky C, C, Automatization of road machines in the tenth tletter, Construction and road machines, 1977, 3, pp.7-9

d2, Advantages of hydromechanical

control systems for longitudinal and transverse profiles in comparison with the electronic system on road machines.

FIG. 2

Bb

ten

3

Claims (2)

Claim 1. The hydromechanical control system of the position of the working body of a road-building machine, comprising a hydraulic distributor including a spool connected to the pusher, a spring and a roller with an eccentrically mounted sub-bearing for interacting with the pusher, a probe mounted on the end of the roller and a cable copier, distinguishing with I mean that, in order to increase the reliability of operation, the distributor housing is equipped with a shank installed with the possibility of longitudinal movement coaxially to the spool, while the pusher is connected with the spool by a screw connection and is adapted to interact with the faces of the distributor housing. 2, The system according to claim 1, characterized in that the shank and spool are connected by means of a spring and are made with end splines.