CS254563B1 - Control device for direction of swivel being controled from a number of stations - Google Patents

Abstract

Several vehicle control devices is provided with hydraulic power steering, in front of which is four-way three-position switchgear. The switchgear is out others have a signal hole that is connected by a signal branch with an additional single action hydraulic power steering. Just by switching on the electric switch the solenoid circuit is controlled vehicle from outside the machine.

Description

(54) Direction control devices from several locations

The device for driving vehicles from several locations is equipped with hydraulic servo control, which is preceded by a four-way three-position switchboard. The switchgear is equipped, among other things, with a signaling opening which is connected by a signaling branch to an additional single-acting adjusting device of the hydraulic power steering. By simply closing the electromagnet solenoid switch, the vehicle can be steered from outside the machine.

(11) (B1) (51) Int. Cl. ⁴ B 62 D 5/06

Giant. 1

BACKGROUND OF THE INVENTION The invention relates to directional control of wires and machines from multiple locations on a vehicle and remote control from locations away from a vehicle.

Some vehicles and mobile working machines such as earth moving and construction machines, excavators, cranes are equipped with two or more work stations - cabins, one for transport and the other for work. Sometimes - when the machine is operating in a hazardous or harmful environment - it is required that the vehicle or machine can be driven remotely - by cable or radio - from a position that is not endangered. When working, the vehicle or machine is usually moved over short distances and slowly, which significantly reduces the requirements for steering precision compared to transport on public roads, so it is usually sufficient to use command control without feedback.

Most vehicles and machines on an automobile chassis equipped with two or more cabs do not allow the direction of transpost from all locations. Therefore, when changing modes: working and transport, the operator must move from one station to another, wasting work time and reducing vehicle or machine utilization.

There are known devices for controlling steering from several stations - from the cab on the chassis and from the cab on the working superstructure of the machine - eg excavators. This device has before the hydraulic servo control of conventional design included a switchboard for pre-selection of control from one location, control switchboard, which allows command control from the cab on the work superstructure and a third switchboard, which has changed the switchboard and linear hydraulic motor for forced adjustment Thus, it is set on the command control. The above-mentioned device utilizes two superstructures of the superstructure when driving from the driver's cab on the chassis, and in the command control from the cab on the working superstructure.

Due to the desired function, said device is excessively complicated, rugged, bulky and expensive. Said device neglects the fact that the command control needs to occur at the same time as the relocation, when the bogie generator running on the hydraulic power steering is running and therefore it is not necessary to supply the power steering from another hydraulic generator - work superstructure pumps. The device does not allow remote control from outside the vehicle.

The above-mentioned deficiencies are eliminated by a vehicle control system from several hydraulic servo control stations, which is preceded by a four-way three-position distributor.

The distributor is connected by an inlet opening with a generator branch, a waste opening with a waste branch and other openings with the inlet openings of a hydraulic power steering control valve.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated schematically in the accompanying drawings in which: Figure 1 schematically illustrates the principle of a device according to the invention with a hydraulic power steering and a front four-way three-position distributor equipped with a signaling opening;

Fig. 3 shows in more detail a diagram of a four-way three-position distributor of the device according to the invention.

Device for controlling the direction of vehicles from several stations according to the invention in the embodiment according to Fig. 1 consists of a conventional hydraulic power steering servomotor comprising _1 _2> 2 ^and an additional distributor, single £ adjusting device. The hydraulic power steering 2 is controlled by a steering wheel 2 lever mechanism. A four-way, three-position distributor 10 is connected between the hydraulic power steering 1 and the hydraulic motor 6 driven by the vehicle's internal combustion engine. 16 with the inlet openings 17, 18 of the hydraulic power steering distributor 2

1.

In addition, the three-position distributor 10 is provided with a signaling opening 19 connected by a signaling branch 20 to an additional single-acting adjusting device 4 of the hydraulic power steering JL. The four-way three-position switchgear 10 is provided with an electromagnetic actuator with electromagnets 21, 22 in FIG. 1. Electromagnets of ordinary or proportional type may be used. However, the four-way three-position directional control valve 10 may, if desired, also be provided with another adjusting device: mechanical, hydraulic, pneumatic or combined.

When transporting the vehicle, the hydraulic power steering JL is controlled from the chassis cab by the steering wheel and the lever mechanism i>. The power source is a hydrogen generator 2 driven by the internal combustion engine of the vehicle. The four-way three-position distributor 10 is in the middle position (0) in which it connects the inlet port 11 with the outlet port 15 and the outlet port 13 with the outlet port 16 and the signal port 19 with the outlet port 13 so that the additional single acting adjuster 11 is pressure-relieved. and the distributor 3 is not influenced by it.

When driving a vehicle from another location, for example from a cab on a work superstructure, the operator of the machine does not need to prepare anything in advance while driving. The operator selects the desired direction of control by simply switching on an unplugged electromagnet solenoid switch 21 or 22.

E.g. in the left-hand drive with the solenoid 21 connected, the four-way three-position switchgear 10 moves to the L position, thereby connecting the inlet port 11 with the outlet port 15 and simultaneously with the signal port 19. The signal line 20 transmits a pressure signal to a single-acting adjuster 4 adjusts the JL hydraulic power steering distributor 2. left.

The hydraulic fluid j) then flows through a four-way three-position directional control valve 10 π in position L- and the directional control valve / to the piston side of the actuator 2 and extends it to the icing. At the same time, the non-drawn steered wheels turn to the left of the actuator piston rod 2. Control to the right takes place analogously after switching on the electromagnet 22.

The device for controlling the direction of vehicles from several locations according to the invention in the embodiment according to FIG. 2 differs from the embodiment according to FIG. 20th signal branch to branch 12 branches generator ¹ may be included even a one-way valve 26 and parallel to the smaller hydraulic accumulator 27th two position 25 is adjusted by an electromagnet 28th

This device permits the use of a standard version of the switchgear 10 and 25 and provides a higher pressure for adjusting the single-acting adjusting device 6, so that the device may be smaller. The apparatus of FIG. 2 operates in the same way as the apparatus of FIG. 1, except that at the same time as one of the solenoids 21 or the second solenoid 22 is connected, the solenoid 28 is also connected to a power source such as a battery. If there is a need for multi-site control, the electrical switches of the solenoid circuit 21, 22 or 28 are placed at each site. If control from outside the vehicle is required, a connection cable may be used for shorter distances and a longer radio link between the operator and the vehicles may be used.

The speed of the control is determined by the instantaneous flow rate from the pumps 9 '. If it is desirable to control the speed of the command control, the four-way three-position controller 10 ^{1 1} of FIG. , the four-way three-position distributor 10 '' is placed in an intermediate position L 'or R', in which it passes a part of the flow supplied by the Hydrogen Generator 9 from the inlet port 11 to the outlet port 13.

Claims (7)

OBJECT OF THE INVENTION A multi-station direction control system comprising a hydraulic power steering system comprising a servomotor and a steering wheel-actuated distributor and a single-acting adjusting device, characterized in that a four-way three-position distributor (10) is interposed between the hydraulic power steering (1) and the pump (9). 10 ', 10' ') connected by the inlet opening (11) to the generator branch (12), the outlet opening (13) with the waste branch (14) and the outlet openings (15, 16) to the inlet openings (17, 18) of the switchgear (3) ), hydraulic power steering (1), Device for controlling the direction of vehicles from several locations according to claim 1, characterized in that the four-way three-position distributor (10) is provided with a signaling opening (19) connected by a signal branch (20) to a single-acting adjusting device (4) of the hydraulic distributor. power steering (1). Device for controlling the direction of vehicles from several locations according to Claims 1 and 2, characterized in that the four-way three-position switchgear (10) is provided with a signaling opening (19) which is connected to the discharge opening (13) in neutral position (0). and in its control positions (L, R) is connected to the inlet opening (11). Device for controlling the direction of vehicles from several locations according to claim 1, characterized in that a single-action environmental adjuster (4) is connected to the generator string (12) via a two-position switchgear (25), wherein in the starting position of the two-position switchgear (25) it is connected to the waste branch (14) and in the adjusted position to the generator branch (12). Arrangement for controlling the direction of a vehicle from several locations according to one of Claims 1 to 4, characterized in that between the generator branch (12) and the two-position distributor (25) there is a one-way valve (26) in its branch (12 '). The hydraulic accumulator (27) is connected in parallel. Device according to one of Claims 1 to 5, characterized in that the four-way three-position distributor (10, 10 ', 10' ') is provided with an adjusting device. Device for controlling the direction of vehicles from several locations according to Claims 1 to 6, characterized in that the four-way three-position switchgear (10 '') is provided with proportional electromagnets (23, 24) connected to the power supply via adjustable resistors (29, 30).