CN217623744U

CN217623744U - Full-hydraulic steering system of unmanned pure electric off-road wide-body dumper

Info

Publication number: CN217623744U
Application number: CN202221428527.0U
Authority: CN
Inventors: 訾源; 曲军; 江安东; 刘振中; 王用
Original assignee: Inner Mongolia Shanhe Juding Mining Machinery Manufacturing Co ltd
Current assignee: Inner Mongolia Shanhe Juding Mining Machinery Manufacturing Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-10-21
Anticipated expiration: 2032-06-08

Abstract

The utility model belongs to the technical field of unmanned driving, specifically disclose an all hydraulic steering system of unmanned pure electronic non-highway wide body tipper, including hydraulic tank, ball valve, electronic steering gear pump, high pressure filter, steering topping up valves, energy storage ware, electric hydraulic steering gear, steering cylinder subassembly, return oil filter, steering cylinder subassembly comprises the left side steering cylinder and the right side steering cylinder of installing in vehicle front axle steering tie rod T type arm left and right sides, the utility model discloses an all hydraulic steering system, cancelled the steering wheel and turned to the mechanical connection between the trapezium to hydraulic line replaces, has the light flexibility of manipulation, compact structure, easily advantage such as installation and arrangement, and the electronic steering gear pump that adopts invariable rotational speed provides power, can reduce the discharge capacity of pump, more can provide stable power supply than the all hydraulic steering system of traditional diesel vehicle hydraulic pump installation on the engine power takeoff.

Description

Full-hydraulic steering system of unmanned pure electric off-highway wide-body dump truck

Technical Field

The utility model relates to an all-hydraulic steering system of unmanned pure electronic non-highway wide-body tipper belongs to unmanned driving technique field.

Background

During the fourteen five periods, coal still remains the main energy of China, and under the background of promoting the goal of realizing carbon peak reaching and carbon neutralization, the world energy low-carbon and non-carbon process is accelerated, and the characteristics of energy cleaning, greening and low-carbon are obviously enhanced. With the deep integration of the internet, big data, artificial intelligence and various industries, green mining and intelligent construction of coal mines become a main battlefield for high-quality development of coal industries, and the development of the unmanned pure electric off-highway wide dump truck has important significance for improving the safety production level and the production efficiency benefit.

The traditional off-highway dump truck generally adopts mechanical hydraulic power-assisted steering, and the steering driving mode has the problems of small single-axle load, high failure rate and heavy steering. The prior off-highway dump truck is generally a diesel vehicle, a hydraulic steering system adopted by the off-highway dump truck is provided with a power source by a hydraulic pump directly arranged on an engine power takeoff, the flow of hydraulic oil provided by the hydraulic pump depends on the rotating speed of an engine, the problem of heavy steering due to insufficient oil supply exists when the engine is in idle speed or in low rotating speed, and the off-highway dump truck is driven manually by a driver. The working time of a mining area is 24 hours, each vehicle is required to be equipped with at least two drivers, the labor cost is very high, and the operation cost and potential safety hazards are increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an all-hydraulic steering system of unmanned pure electronic non-highway wide-body tipper solves the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a full-hydraulic steering system of an unmanned pure electric off-highway wide-body dump truck comprises a hydraulic oil tank, a ball valve, an electric steering gear pump, a high-pressure filter, a steering liquid-filling valve bank, an energy accumulator, an electro-hydraulic steering gear, a steering oil cylinder assembly and an oil return filter, wherein the steering oil cylinder assembly consists of a left steering oil cylinder and a right steering oil cylinder which are arranged on the left side and the right side of a T-shaped arm of a steering tie rod of a front axle of a vehicle.

Preferably, the electric steering gear pump is a constant-rotating-speed electric gear pump, and the permanent magnet synchronous motor drives the quantitative gear pump.

Preferably, the steering liquid-filling valve group comprises a first overflow valve, a logic valve, a first one-way valve, an unloading valve and an electromagnetic valve.

Preferably, the accumulator is generally a bladder accumulator.

Preferably, the electro-hydraulic steering gear comprises a second overflow valve, a third overflow valve, a second one-way valve, a third one-way valve, a hydraulic follow-up steering gear, a fourth one-way valve, a fifth one-way valve, a mode switching valve, an electro-hydraulic steering valve, a controller, a position sensor, an electro-hydraulic valve bridge circuit, a mode switching control valve and a pressure reducing valve.

Preferably, the electrohydraulic steering device is generally installed and used in combination with an SASA sensor of a matching part thereof, the SASA sensor can monitor the rotation of a steering wheel, and when a vehicle is in an unmanned electric control steering mode, for example, the steering wheel is rotated manually to intervene in steering, the SASA sensor detects that a signal is transmitted to a controller, so that the steering enters a manual mode.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model belongs to the technical field of unmanned, specifically disclose a full-hydraulic steering system of unmanned pure electric non-highway wide-body dumper, the utility model discloses following beneficial effect has:

1. the full hydraulic steering system of the utility model cancels the mechanical connection between the steering wheel and the steering trapezoid, and replaces the steering wheel with a hydraulic pipeline, thus having the advantages of light and flexible operation, compact structure, easy installation and arrangement, etc.;

2. the utility model adopts the electric steering gear pump with constant rotating speed to provide power, which can reduce the discharge capacity of the pump and provide stable power source compared with the full hydraulic steering system of the traditional diesel vehicle hydraulic pump arranged on the engine power takeoff;

3. the utility model adopts the mode that the steering liquid-filling valve group and the energy accumulator supply oil to the steering gear, thereby improving the stability of the vehicle when steering rapidly, realizing the emergency steering function, and when the power source breaks down suddenly, the energy accumulator provides a temporary hydraulic source for the steering system, avoiding the safety accident caused by emergency braking and incapability of steering after the vehicle loses power;

4. the utility model discloses an electricity liquid steering gear, this steering gear have automatically controlled and turn to and artifical manual two kinds of modes that turn to, can cooperate unmanned control system to realize automatic steering, when needs artifical intervention to turn to, artifical manual turn to is preferential, reduces cost of labor, operation cost and potential safety hazard.

Drawings

FIG. 1 is a schematic diagram of the present invention;

in the figure: 1. a hydraulic oil tank; 2. a ball valve; 3. an electric steering gear pump; 4. a high pressure filter; 5. a steering liquid-filling valve bank; 51. a first overflow valve; 52. a logic valve; 53. a first check valve; 54. an unloading valve; 55. an electromagnetic valve; 6. an accumulator; 7. an electro-hydraulic steering gear; 701. a second overflow valve; 702. a third overflow valve; 703. a second one-way valve; 704. a third check valve; 705. a hydraulic follow-up steering gear; 706. a fourth check valve; 707. a fifth check valve; 708. a mode switching valve; 709. an electro-hydraulic steering valve; 710. a controller; 711. a position sensor; 712. an electro-hydraulic valve bridge circuit; 713. a mode switching control valve; 714. a pressure reducing valve; 8. a steering cylinder assembly; 81. a left steering cylinder; 82. a right steering cylinder; 9. and an oil return filter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, the present invention provides a technical solution: a full-hydraulic steering system of an unmanned pure electric off-highway wide-body dump truck comprises a hydraulic oil tank 1, a ball valve 2, an electric steering gear pump 3, a high-pressure filter 4, a steering liquid-filling valve group 5, an energy accumulator 6, an electric hydraulic steering gear 7, a steering oil cylinder assembly 8 and an oil return filter 9, wherein the steering oil cylinder assembly 8 consists of a left steering oil cylinder 81 and a right steering oil cylinder 82 which are arranged on the left side and the right side of a T-shaped arm of a steering tie rod of a front axle of a vehicle. The electric steering gear pump 3 is a constant-rotating-speed electric gear pump, and a permanent magnet synchronous motor drives the quantitative gear pump. The steering charging valve group 5 comprises a first overflow valve 51, a logic valve 52, a first check valve 53, an unloading valve 54 and a solenoid valve 55. The accumulator 6 is typically a bladder accumulator. The electro-hydraulic steering gear 7 comprises a second overflow valve 701, a third overflow valve 702, a second check valve 703, a third check valve 704, a hydraulic servo steering gear 705, a fourth check valve 706, a fifth check valve 707, a mode switching valve 708, an electro-hydraulic steering valve 709, a controller 710, a position sensor 711, an electro-hydraulic valve bridge 712, a mode switching control valve 713 and a pressure reducing valve 714. The electrohydraulic steering gear 7 is generally installed and used in combination with an SASA sensor of a matching set thereof, the SASA sensor can monitor the rotation of a steering wheel, and when a vehicle is in an unmanned electric control steering mode, for example, the steering wheel is manually rotated to intervene in steering, the SASA sensor detects that a signal is transmitted to the controller 710, so that the steering enters a manual mode.

The working principle is as follows: the utility model relates to a full-hydraulic steering system of unmanned electronic wide body dumper on pure electric non-highway, electronic steering gear pump 3 inhales from hydraulic tank 1 through ball valve 2, its export fluid turns to the P mouth of liquid filling valve group 5 through 4 flows of high pressure filter, the T mouth that turns to liquid filling valve group 5 connects hydraulic tank 1 through return oil filter 9, the AC mouth that turns to liquid filling valve group 5 connects energy storage ware 6, here energy storage ware 6 is two, the P1 mouth that turns to liquid filling valve group 5, T1 mouth corresponds the P mouth of connecting electro-hydraulic steering gear 7 respectively, the T mouth, the LS mouth of electro-hydraulic steering gear 7 is with the end cap shutoff, the L mouth of electro-hydraulic steering gear 7 links to each other with the LB mouth of left side steering cylinder 81 and the RA mouth of right side steering cylinder 82, the R mouth of electro-hydraulic steering gear 7 links to each other with the LA mouth of left side steering cylinder 81 and the RB mouth of right side steering cylinder 82. The steering charging valve group 5 is integrated with a first overflow valve 51, a logic valve 52, a first check valve 53, an unloading valve 54 and a solenoid valve 55. The first relief valve 51 is a system relief valve, and the set pressure is 210bar. The logic valve 52, the first check valve 53 and the unloading valve 54 realize a liquid charging function, when the driving motor of the electric steering gear pump 3 is started, hydraulic oil enters from a port P of the steering liquid charging valve group 5, and charges the two accumulators 6 through an AC port. When the charging pressure gradually rises to reach the set pressure 160bar of the unloading valve 54, the unloading valve 54 is opened, at this time, the control oil at the left end of the logic valve 52 flows back to the hydraulic oil tank 1 through the unloading valve 54, and the control oil at the right end of the logic valve 52 overcomes the spring force at the left end to be about 3.5bar to open the logic valve 52, so that the hydraulic oil output by the electric steering gear pump 3 is unloaded at a small pressure, and the overflow loss is avoided. When the pressure of the hydraulic oil in the accumulator 6 drops to about 120bar, the unloading valve 54 is closed, the control oil at the left end of the logic valve 52 reestablishes pressure, the logic valve 52 is closed, and the accumulator 6 continues to be charged. The first check valve 53 prevents the hydraulic oil in the accumulator 6 from flowing backward and impacting the electric power steering gear pump 3. The electromagnetic valve 55 is opened when the vehicle is overhauled and maintained, hydraulic oil in the energy accumulator 6 is quickly released, and accidents caused by misoperation of directions or when an oil pipe is detached are avoided. The electro-hydraulic steering gear 7 is integrated with a second overflow valve 701, a third overflow valve 702, a second check valve 703, a third check valve 704, a hydraulic servo steering gear 705, a fourth check valve 706, a fifth check valve 707, a mode switching valve 708, an electro-hydraulic steering valve 709, a controller 710, a position sensor 711, an electro-hydraulic valve bridge 712, a mode switching control valve 713 and a pressure reducing valve 714. The oil entering from the port P of the electro-hydraulic steering gear 7 is divided into three paths in parallel, and the three paths are respectively connected to the fifth check valve 707, the electro-hydraulic steering valve 709 and the reducing valve 714. The oil passing through the fifth check valve 707 is connected to the hydraulic follow-up steering gear 705, and the hydraulic follow-up steering gear 705 is operated by a driver through a steering wheel by manual steering, and outputs the oil to an L port or an R port of the electro-hydraulic steering gear 7 when the steering wheel is reversed left or right. The second overflow valve 701 and the third overflow valve 702 form an overload valve to perform buffering protection on the steering cylinder assembly 8. The second check valve 703 and the third check valve 704 constitute an oil replenishing valve to prevent the steering cylinder loop from being sucked empty. The fourth check valve 706 is an emergency manual steering valve that draws oil from the T port when the pump supply fails. The oil passing through the electro-hydraulic steering valve 709 is output to an L port or an R port of the electro-hydraulic steering gear 7 through a left position of the mode switching valve 708 when the control oil at two ends of the electro-hydraulic steering valve 709 pushes the spool to reverse left or right. The mode switching valve 708 controls the electro-hydraulic steering gear 7 to switch between two modes of manual steering and electric steering, wherein the valve core is in manual steering at the right position and is in electric steering at the left position. The oil passing through the pressure reducing valve 714 flows to the left control port of the mode switching valve 708 when the mode switching control valve 713 is electrically switched, so that the mode switching valve 708 is switched to the left position, and the electro-hydraulic steering gear 7 is switched to the electric control steering mode. The other path of oil passing through the pressure reducing valve 714 flows to the solenoid valve 55 bridge circuit from the left position of the mode switching valve 708, two oil output ends of the solenoid valve 55 bridge circuit are respectively connected to control ports at two ends of the electro-hydraulic steering valve 709, the electro-hydraulic steering valve 709 is controlled to be reversed to the left or the right, and electric signals of the solenoid valve 55 bridge circuit are output by the controller 710. The controller 710 senses the real-time position of the spool through a position sensor 711 connected to the electro-hydraulic steering valve 709, and controls the oil of the electro-hydraulic valve bridge circuit 712 to be closed or output the oil to the left end or the right end of the electro-hydraulic steering valve 709 by combining signals of an external sensing system, such as a tire rotation angle sensor signal, a GPS position signal, a radar signal, a vehicle speed sensor signal, and the like, so as to control steering. The utility model discloses simple structure, convenient operation is fit for using widely.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a full hydraulic steering system of unmanned pure electric off-highway wide-body tipper which characterized in that: the hydraulic steering device comprises a hydraulic oil tank (1), a ball valve (2), an electric steering gear pump (3), a high-pressure filter (4), a steering liquid filling valve group (5), an energy accumulator (6), an electro-hydraulic steering gear (7), a steering oil cylinder assembly (8) and an oil return filter (9), wherein the steering oil cylinder assembly (8) consists of a left steering oil cylinder (81) and a right steering oil cylinder (82) which are arranged on the left side and the right side of a T-shaped arm of a steering tie rod of a front axle of a vehicle.

2. The full hydraulic steering system of the unmanned pure electric off-road wide-body dumper as claimed in claim 1, characterized in that: the electric steering gear pump (3) is a constant rotating speed electric gear pump, and the electric steering gear pump (3) is driven by a permanent magnet synchronous motor to drive a quantitative gear pump.

3. The full hydraulic steering system of the unmanned pure electric off-road wide-body dumper as claimed in claim 1, characterized in that: the steering liquid filling valve group (5) comprises a first overflow valve (51), a logic valve (52), a first one-way valve (53), an unloading valve (54) and an electromagnetic valve (55).

4. The full hydraulic steering system of the unmanned pure electric off-road wide-body dumper as claimed in claim 1, characterized in that: the energy accumulator (6) is typically a bladder type energy accumulator.

5. The full hydraulic steering system of the unmanned pure electric off-highway wide-body dump truck according to claim 1, characterized in that: the electro-hydraulic steering gear (7) comprises a second overflow valve (701), a third overflow valve (702), a second one-way valve (703), a third one-way valve (704), a hydraulic follow-up steering gear (705), a fourth one-way valve (706), a fifth one-way valve (707), a mode switching valve (708), an electro-hydraulic steering valve (709), a controller (710), a position sensor (711), an electro-hydraulic valve bridge circuit (712), a mode switching control valve (713) and a reducing valve (714).

6. The full hydraulic steering system of the unmanned pure electric off-highway wide-body dump truck according to claim 1, characterized in that: and the electrohydraulic steering gear (7) is externally connected with an external kit SASA sensor for combined installation and use.