CN207712135U - A kind of steering of wide dumper - Google Patents

Abstract

The utility model discloses a kind of steering of wide dumper, belong to haul truck technical field；Its feature is：Pilot operated directional control valve flow is unrestricted, can be matched according to design, and flux amplification valve use is can be used as；Integral steering device is used as distributing valve；Steering gear oil outlet is connect with the hydraulic fluid port of pilot operated directional control valve respectively, and the oil outlet of pilot operated directional control valve is controlled by steering gear, is assigned to the different chamber of servo-cylinder, realizes left and right turn；This structure the advantage is that the mechanical mechanism of Integral steering device makes operator's road pavement feedback have reaction, and the emergent steering-effecting from crucial moment compared with hydro-steering structure；With former Integral steering device systematic comparison, advantage is that flow is not limited by steering gear；By matching huge discharge steering pump, the ease of steering under the conditions of Vehicular turn portability, especially low engine speeds can be improved.

Description

A kind of steering of wide dumper

Technical field：

The utility model is related to haul truck technical field, specifically a kind of steering system of wide dumper System.

Background technology：

The steering of wide dumper generally uses Integral steering structure at present, is limited by its diverter structure, Its maximum stream flow general control is in 30L/min or so, it is difficult to meet large-tonnage vehicle demand so that 90 tons to get on the bus in engine The slow-speed of revolution, since the phenomenon that hard steering occurs in underfed when vehicle fast steering.

Utility model content：

The purpose of the utility model is to overcome the deficiencies of above-mentioned prior art, provide a kind of steering system of wide dumper System；Mainly solve the problems, such as the steering underfed of existing wide dumper.

The technical solution of the utility model is：A kind of steering of wide dumper, is characterized in that, it is by turning To oil tank, gear pump, overflow valve, steering gear, steering wheel, pitman arm, pilot operated directional control valve, steering actuation cylinder and return filter Composition；The steering reservoir oil outlet is connect with gear pump oil inlet by low-voltage tube；Gear pump oil outlet and overflow valve into Hydraulic fluid port is linked together by high-voltage tube；Overflow valve oil outlet is linked together with steering gear oil inlet by high-voltage tube；It turns to Two oil outlets L, R are connect with two control ports L, R of pilot operated directional control valve by high-voltage tube respectively on the left of device；Pilot operated directional control valve Oil inlet P is connect by high-voltage tube with overflow valve oil outlet threeway；Pilot operated directional control valve oil return inlet T is returned by low-voltage tube and overflow valve Hydraulic fluid port threeway in succession, and is connect by low-voltage tube with steering gear oil return opening threeway, then is connect with return filter by low-voltage tube, is returned Oil strainer is connect by low-voltage tube with steering reservoir；The pilot operated directional control valve is connect by high-voltage tube with steering actuation cylinder； Set direction disk and pitman arm in the steering gear, steering wheel control the rotation of steering gear, and defeated by the rotation of pitman arm Go out torque.

A kind of steering of wide dumper of the utility model is not controlled by the oil of the left and right oil outlet of steering gear Pilot operated directional control valve processed moves left and right, will come from the oil of steering pump not with hydraulic fluid port unicom in left and right on reversal valve, another oil Mouthful with oil return opening unicom, due to reversal valve allow by flow can select it is larger, pass through match a huge discharge Steering pump, it is ensured that steering actuation cylinder has enough flow to provide, to improve ease of steering.

Compared with the prior art a kind of steering of wide dumper described in the utility model has following actively effect Fruit：1, compare Integral steering device structure type, by the flow restriction of steering gear, can by flow be not more than 30L/ Min, the demand of 90 tons or more of mine car to flow are larger（38L/min or more）, underfed is easy to cause hard steering；This reality Flow output is controlled by pilot operated directional control valve with novel, the allowing of reversal valve can reach 100L/min or more by flow, complete Full up foot, which turns to, to be required；2, compare hydro-steering, and the pitman arm of the utility model can provide road surface feedback and meet an urgent need It turns to, it is safe.

Description of the drawings：

Fig. 1 is the structural schematic diagram of the utility model.

Wherein：

1 steering reservoir, 2 gear pump, 3 overflow valve, 4 steering gear, 5 steering wheel, 6 pitman arm, 7 pilot operated directional control valve 8 turns to 12 first 13 second high-voltage tube of high-voltage tube of servo-cylinder 9 return filter, 10 first low-voltage tube, 11 second low-voltage tube, 14 third 19 third low-voltage tube 20 of the 6th the 7th high-voltage tube of high-voltage tube 18 of the 5th high-voltage tube 17 of the 4th high-voltage tube 16 of high-voltage tube 15 The 5th low-voltage tube of four low-voltage tubes 21.

Specific implementation mode：

For a better understanding and implementation, providing specific embodiment below in conjunction with the accompanying drawings is described in detail the utility model；Institute It is served only for explaining the utility model for embodiment, is not intended to limit the scope of protection of the utility model.

Embodiment 1, referring to Fig. 1, by design requirement, by the second low-voltage tube 11 connection 1 oil outlet of steering reservoir and gear pump 2 Oil inlet；2 oil outlet of gear pump is linked together with 3 oil inlet of overflow valve by the first high-voltage tube 12；3 oil outlet of overflow valve with 4 oil inlet of steering gear is linked together by the second high-voltage tube 13；By 4 two oil outlets L, R of left side of steering gear and liquid controlled reversing Valve 7 two control ports L, R are connected by the 4th high-voltage tube 15, the 5th high-voltage tube 16 respectively；7 oil inlet P of pilot operated directional control valve is logical Third high-voltage tube 14 is crossed to connect with 3 oil outlet threeway of overflow valve；7 oil return inlet T of pilot operated directional control valve connects third low-voltage tube 19, turns to 4 oil return inlet T of device connects the 4th low-voltage tube 20, and third low-voltage tube 19 connect with 20 threeway of the 4th low-voltage tube, then with connect overflow 21 threeway of the 5th low-voltage tube of 3 oil return opening of valve connects, and the 5th low-voltage tube 21 is connect with return filter 9, and return filter 9 passes through First low-voltage tube 10 is connect with steering reservoir 1；A, B mouthfuls of the oil outlet of pilot operated directional control valve 7 passes through the 7th high-voltage tube the 18, the 6th respectively High-voltage tube 17 is connect with the left and right hydraulic fluid port of steering actuation cylinder 8；Installation direction disk 5 and pitman arm 6, steering wheel 5 in steering gear 4 The steering of steering gear 4 is controlled, and by the rotation output torque of pitman arm 6.

A kind of steering of wide dumper described in the utility model, when vehicle is run, the hydraulic pressure in steering reservoir Oil is drawn by low-voltage tube in gear pump, and the high pressure oil of gear pump by high-voltage tube by after overflow valve, being had respectively entered In steering gear, pilot operated directional control valve；When steering wheel is in middle position, hydraulic oil is respectively from the T of steering gear mouths, the T of pilot operated directional control valve Mouthful outflow, flows back by low-voltage tube, after return filter filters, is flowed back steering reservoir by low-voltage tube.When steering wheel turns left To（Right turn）When, the pitman arm in steering gear is forward（Afterwards）It swings, Drag link, pitman arm, tire is driven to turn left（It is right） It turns to；At this point, steering gear plays pressure, the L that the oil from high-voltage tube passes through steering gear（R）Mouthful, pilot operated directional control valve is entered by high-voltage tube L (R) mouth, pilot operated directional control valve movement, the P mouths of pilot operated directional control valve pass through A（B）A left side (right side) mouth unicom of mouth and steering actuation cylinder, The right side of steering actuation cylinder（It is left）The T mouths of mouth and pilot operated directional control valve pass through B（A）Mouth unicom, high pressure oil enter a left side for steering actuation cylinder （It is right）Chamber pushes servo-cylinder elongation（Shorten）, turned to drive knuckle arm, tire to realize.In steering procedure, turn to Plumbing arm also provides road feel and the emergent effect turned to other than providing steering moment；Overflow valve is set by pressure, protection system System is not damaged because pressure is excessive；Return filter is filtered hydraulic oil, and impurity is avoided to enter system failure part.

Claims (1)

1. a kind of steering of wide dumper, which is characterized in that it is by steering reservoir（1）, gear pump（2）, overflow valve （3）, steering gear（4）, steering wheel（5）, pitman arm（6）, pilot operated directional control valve（7）, steering actuation cylinder（8）And return filter （9）Composition；The steering reservoir（1）Oil outlet and gear pump（2）Oil inlet is connected by low-voltage tube；Gear pump（2）It is fuel-displaced Mouth and overflow valve（3）Oil inlet is linked together by high-voltage tube；Overflow valve（3）Oil outlet and steering gear（4）Oil inlet passes through High-voltage tube links together；Steering gear（4）Two, left side oil outlet L, R respectively with pilot operated directional control valve（7）Two control ports L, R is connected by high-voltage tube；Pilot operated directional control valve（7）Oil inlet P passes through high-voltage tube and overflow valve（3）Oil outlet threeway connects；Liquid Control reversal valve（7）Oil return inlet T passes through low-voltage tube and overflow valve（3）Oil return opening threeway in succession, and passes through low-voltage tube and steering gear（4） Oil return opening threeway connects, then by low-voltage tube and return filter（9）Connection, return filter（9）Pass through low-voltage tube and steering oil Tank（1）Connection；The pilot operated directional control valve（7）Pass through high-voltage tube and steering actuation cylinder（8）Connection；The steering gear（4）On Set direction disk（5）And pitman arm（6）, steering wheel（5）Control steering gear（4）Rotation, and by pitman arm（6）Rotation it is defeated Go out torque.