CN203474395U - Scissor-type high-altitude working vehicle walking hydraulic system - Google Patents

Scissor-type high-altitude working vehicle walking hydraulic system Download PDF

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Publication number
CN203474395U
CN203474395U CN201320475869.2U CN201320475869U CN203474395U CN 203474395 U CN203474395 U CN 203474395U CN 201320475869 U CN201320475869 U CN 201320475869U CN 203474395 U CN203474395 U CN 203474395U
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CN
China
Prior art keywords
control valve
solenoid directional
valve
way solenoid
directional control
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Withdrawn - After Issue
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CN201320475869.2U
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Chinese (zh)
Inventor
岳奇
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Hunan Sinoboom Heavy Industry Co Ltd
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Hunan Sinoboom Heavy Industry Co Ltd
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Priority to CN201320475869.2U priority Critical patent/CN203474395U/en
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Publication of CN203474395U publication Critical patent/CN203474395U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses a scissor-type high-altitude working vehicle walking hydraulic system. A power unit (2) is connected with a lifting two-position four-way solenoid directional valve (3). The lifting two-position four-way solenoid directional valve (3) is connected with a priority valve (5). The priority valve (5) is connected with a turning three-position four-way solenoid directional valve (6). An outlet of the priority valve (5) and an outlet of a one-way valve (13) are connected with a walking brake (18) in one path and connected with a three-position four-way solenoid directional valve (7) in the other path. An oil port of the three-position four-way solenoid directional valve (7) is connected with a first one-way sequence valve (10). The one-way sequence valve (10) is connected with a first walking motor (17) and connected with a second walking motor (29) through a two-position four-way solenoid directional valve (12). An oil port of the three-position four-way solenoid directional valve (7) is connected with a second one-way sequence valve (11). The second one-way sequence valve (11) is connected with the second walking motor (29) and connected with the first walking motor (17) through the two-position four-way solenoid directional valve (12). The scissor-type high-altitude working vehicle walking hydraulic system saves energy and lowers production cost.

Description

A kind of scissor-type aerial platform vibration hydraulic system
Technical field
The utility model relates to a kind of scissor-type aerial platform, particularly relates to a kind of scissor-type aerial platform vibration hydraulic system.
Background technology
Automatic travelling hydraulic motor drives scissor aerial work platform conventionally to require walking to have 3 kinds of speed to switch, its switching by the hydraulic circuit series and parallel connections between two motors realizes, and while causing car load to travel below different speed, hydraulic efficiency pressure system has different pressure.Low speed walking after platform raising, the pressure of now walking is minimum, while holding during drg meeting, closes, and causes vehicle to run non-continuous event.If take, two motor oil-feeds place, add balance cock, pressure regulates too high, and during walking, system pressure is too high, causes energy dissipation, has greatly shortened the period of service after Vehicular charging.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of conserve energy, the scissor-type aerial platform vibration hydraulic system saving production cost.
In order to solve the problems of the technologies described above, the scissor-type aerial platform vibration hydraulic system that the utility model provides, comprise power unit, elevating ram, lifting two-position four-way solenoid directional control valve, pressure-gradient control valve, steering cylinder, turn to 3-position 4-way solenoid directional control valve, check valve, walking drg, braking pilot operated directional control valve, braking manual pump, 3-position 4-way solenoid directional control valve, the first running motor, the second running motor and return filter, described power unit connects described lifting two-position four-way solenoid directional control valve, described lifting two-position four-way solenoid directional control valve connects described pressure-gradient control valve, described pressure-gradient control valve connects the described 3-position 4-way solenoid directional control valve that turns to, outlet one tunnel of described pressure-gradient control valve and described check valve is connected braking pilot operated directional control valve and the braking manual pump of described walking drg, one tunnel connects described 3-position 4-way solenoid directional control valve, a hydraulic fluid port of described 3-position 4-way solenoid directional control valve is connected with the first one way sequence valve, the first described one way sequence valve connects the first described running motor and connects the second described running motor by two-position four-way solenoid directional control valve, a hydraulic fluid port of described 3-position 4-way solenoid directional control valve connects the second one way sequence valve, the second described one way sequence valve connects the second described running motor and connects the first described running motor by described two-position four-way solenoid directional control valve, a hydraulic fluid port of described 3-position 4-way solenoid directional control valve connects described return filter.
Adopt the scissor-type aerial platform vibration hydraulic system of technique scheme; during walking to the protection of drg with use energy-conservation; by suitable one way sequence valve and the drg of opening pressure, be used in conjunction with; while making to walk, hydraulic system pressure remains at more than drg opens pressure, but is unlikely to again hypertonia.Optimize whole hydraulic efficiency pressure system, controlling lifting function spool in advance, loss of pressure while reducing lifting action, cut forklift-walking and use under the prerequisite of function and remove redundant valve core meeting, the high low speed of Vehicle Driving Cycle switches as long as switched by a spool, has reduced the local pressure loss of hydraulic efficiency pressure system when walking and along stroke pressure, has lost conserve energy, improve the period of service after vehicle single charge, also saved widely productive costs simultaneously.
Compared with prior art, the utility model has the advantage of: when vehicle to run, keep certain system pressure to guarantee that drg is always in open mode, hydraulic system pressure is not too high again simultaneously, hydraulic system pressure while having reduced lifting and walking, play energy-conservation effect, improve the period of service after vehicle single charge.
Accompanying drawing explanation
Fig. 1 is original hydraulic system principle figure.
Fig. 2 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Referring to Fig. 1, existing scissor-type aerial platform vibration hydraulic system, comprise oil absorption filter 1, power unit 2, lifting two-position four-way solenoid directional control valve 3, lifting by pass valve 4, pressure-gradient control valve 5, turn to 3-position 4-way solenoid directional control valve 6, 3-position 4-way solenoid directional control valve 7, braking pilot operated directional control valve 8, braking manual pump 9, check valve 13, turn to by pass valve 14, by pass valve 15, return filter 16, the first running motor 17, walking drg 18, elevating ram 19, steering cylinder 20, the first electromagnetic valve 23, the second electromagnetic valve 24, constant flow spool 25, balance cock 26, shutoff valve 27, the first check valve 28 and the second running motor 29, hydraulic efficiency pressure system provides hydraulic oil by power unit 2, hydraulic oil enters main valve piece, main system pressure is controlled by by pass valve 15, through a part of flow of pressure-gradient control valve 5, enter steering cylinder 20 again, another part enters main hydraulic system, steering pressure is by turning to by pass valve 14 to control, pressure oil enters 3-position 4-way solenoid directional control valve 7 through lifting two-position four-way solenoid directional control valve 3 again, wherein shuttle valve 21 gets that oil enters braking pilot operated directional control valve 8 and braking manual pump 9 is opened walking drg 18, walking moves forward and backward and controls by 3-position 4-way solenoid directional control valve 7.During low speed walking, hydraulic oil enters respectively two running motors by flow divider-combiner 22, now two running motor parallel connections.During high speed the first electromagnetic valve 23 and the second electromagnetic valve 24 simultaneously electric, now hydraulic oil enters then oil sump tank of another one motor through the first electromagnetic valve 23 again by the second electromagnetic valve 24 and motor, now two running motors series connection.Switching by the hydraulic circuit series and parallel connections between two running motors realizes, and while causing car load to travel below different speed, hydraulic efficiency pressure system has different pressure.Low speed walking after platform raising, the pressure of now walking is minimum, while holding during 18 meeting of walking drg, closes, and causes vehicle to run non-continuous event.If take, two running motor oil-feeds place, add balance cock 26, pressure regulates too high, and during walking, system pressure is too high, causes energy dissipation, has greatly shortened the period of service after Vehicular charging.
Referring to Fig. 2, oil absorption filter 1 connects power unit 2, power unit 2 connects the lifting two-position four-way solenoid directional control valve 3 of elevating ram 19, elevating ram 19 is provided with lifting by pass valve 4, lifting two-position four-way solenoid directional control valve 3 connects pressure-gradient control valve 5, what pressure-gradient control valve 5 connected steering cylinders 20 turns to 3-position 4-way solenoid directional control valve 6, steering cylinder 20 is provided with check valve 13 and turns to by pass valve 14, outlet one tunnel of pressure-gradient control valve 5 and check valve 13 is connected braking pilot operated directional control valve 8 and the braking manual pump 9 of the drg 18 of walking, one tunnel is connected with 3-position 4-way solenoid directional control valve 7, a hydraulic fluid port of 3-position 4-way solenoid directional control valve 7 is connected with the first one way sequence valve 10, the first one way sequence valve 10 connects the first running motor 17 and connects the second running motor 29 by two-position four-way solenoid directional control valve 12, a hydraulic fluid port of 3-position 4-way solenoid directional control valve 7 connects the second one way sequence valve 11, the second one way sequence valve 11 connects the second running motor 29 and connects the first running motor 17 by two-position four-way solenoid directional control valve 12, a hydraulic fluid port of 3-position 4-way solenoid directional control valve 7 connects return filter 16, between power unit 2 and return filter 16, be connected with by pass valve 15.
Referring to Fig. 2; originally in scissor-type aerial platform vibration hydraulic system when walking providing, is to the protection of walking drg 18 and use energy-conservation; by suitable the first one way sequence valve 10 and the second one way sequence valve 11 of opening pressure, be used in conjunction with walking drg 18; more than hydraulic system pressure remains at walking drg 18 opens pressure while making to walk, but be unlikely to again hypertonia.Optimize whole hydraulic efficiency pressure system, the lifting two-position four-way solenoid directional control valve 3 of controlling elevating ram 19 lifting functions is shifted to an earlier date, loss of pressure while reducing lifting action, cut forklift-walking and use under the prerequisite of function and remove redundant valve core meeting, the high low speed of Vehicle Driving Cycle switches as long as switched by a spool, reduced the local pressure loss of hydraulic efficiency pressure system when walking and lost along stroke pressure, conserve energy, improve the period of service after vehicle single charge, also saved widely productive costs simultaneously.

Claims (1)

1. a scissor-type aerial platform vibration hydraulic system, comprise power unit (2), elevating ram (19), lifting two-position four-way solenoid directional control valve (3), pressure-gradient control valve (5), steering cylinder (20), turn to 3-position 4-way solenoid directional control valve (6), check valve (13), walking drg (18), braking pilot operated directional control valve (8), braking manual pump (9), 3-position 4-way solenoid directional control valve (7), the first running motor (17), the second running motor (29) and return filter (16), it is characterized in that: described power unit (2) connects described lifting two-position four-way solenoid directional control valve (3), described lifting two-position four-way solenoid directional control valve (3) connects described pressure-gradient control valve (5), described pressure-gradient control valve (5) connects the described 3-position 4-way solenoid directional control valve (6) that turns to, outlet one tunnel of described pressure-gradient control valve (5) and described check valve (13) is connected the braking pilot operated directional control valve (8) of described walking drg (18) and brakes manual pump (9), one tunnel connects described 3-position 4-way solenoid directional control valve (7), a hydraulic fluid port of described 3-position 4-way solenoid directional control valve (7) is connected with the first one way sequence valve (10), described the first one way sequence valve (10) connects described the first running motor (17) and connects described the second running motor (29) by two-position four-way solenoid directional control valve (12), a hydraulic fluid port of described 3-position 4-way solenoid directional control valve (7) connects the second one way sequence valve (11), described the second one way sequence valve (11) connects described the second running motor (29) and connects described the first running motor (17) by described two-position four-way solenoid directional control valve (12), a hydraulic fluid port of described 3-position 4-way solenoid directional control valve (7) connects described return filter (16).
CN201320475869.2U 2013-08-06 2013-08-06 Scissor-type high-altitude working vehicle walking hydraulic system Withdrawn - After Issue CN203474395U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320475869.2U CN203474395U (en) 2013-08-06 2013-08-06 Scissor-type high-altitude working vehicle walking hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320475869.2U CN203474395U (en) 2013-08-06 2013-08-06 Scissor-type high-altitude working vehicle walking hydraulic system

Publications (1)

Publication Number Publication Date
CN203474395U true CN203474395U (en) 2014-03-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103693592A (en) * 2013-08-06 2014-04-02 湖南星邦重工有限公司 Walking hydraulic system for scissor-type overhead working truck
CN105114379A (en) * 2015-09-30 2015-12-02 湖南星邦重工有限公司 Lifting platform and hydraulic system thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103693592A (en) * 2013-08-06 2014-04-02 湖南星邦重工有限公司 Walking hydraulic system for scissor-type overhead working truck
CN103693592B (en) * 2013-08-06 2015-09-30 湖南星邦重工有限公司 A kind of scissor-type aerial platform vibration hydraulic system
CN105114379A (en) * 2015-09-30 2015-12-02 湖南星邦重工有限公司 Lifting platform and hydraulic system thereof

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