CN102359587A - Manual and automatic integrated speed change system for wheel type hydraulic excavator - Google Patents
Manual and automatic integrated speed change system for wheel type hydraulic excavator Download PDFInfo
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- CN102359587A CN102359587A CN2011102537154A CN201110253715A CN102359587A CN 102359587 A CN102359587 A CN 102359587A CN 2011102537154 A CN2011102537154 A CN 2011102537154A CN 201110253715 A CN201110253715 A CN 201110253715A CN 102359587 A CN102359587 A CN 102359587A
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Abstract
The invention discloses a manual and automatic integrated speed change system for a wheel type hydraulic excavator, belonging to excavator traveling speed change systems. The invention aims at providing a wheel type hydraulic excavator traveling speed change system capable of executing manual or automatic gear shifting operation without parking. The manual and automatic integrated speed change system comprises a control part and an execution part, wherein the control part comprises a pilot pump (14), a throttle (9), a parking solenoid valve (10), a gear solenoid valve (11), a backward solenoid valve (12), a traveling solenoid valve (13), a main valve (2), a controller (1), a pressure sensor (7) and a rotating speed sensor (6); and the execution part comprises a main pump (8), the main valve (2), a hydraulic motor (5), a low speed oil retaining mouth (3) and a high speed oil retaining mouth (4). The manual or automatic gear shifting mode can be selected according to pavement conditions, and the stepless speed change of vehicle traveling is realized. The manual and automatic integrated speed change system has the advantages of short gear shifting response time, high reliability, no impact in synchronization and the like. The manual and automatic integrated speed change system is a wheel type hydraulic excavator traveling speed change system.
Description
Technical field:The present invention relates to a kind of engineering machinery walking speed variator system, relate in particular to a kind of auto-manual stepless speed variator system that is used for hydraulic wheel excavator.
Background technique:As everyone knows; Wheeled excavator all must stop earlier usually and just can carry out the manual shift operation at present; Not only there are defectives such as gearshift bothers, the gearshift response time is long, mobility is poor, driver's labor intensity is big; And travelling speed generally has only 30 kilometers/hour, can not adapt to the needs of current engineering machinery development.
Summary of the invention:In order to overcome the defective that exists in the existing technology, the present invention aims to provide that a kind of dispense with parking can carry out manually or the hydraulic wheel excavator walking hand of self shifter operation/from the one speed variator system.
To achieve these goals, the present invention adopts following technological scheme: it comprises control section and do-part; Said control section is by pioneer pump, throttle, Parking solenoid valve, gear solenoid valve, reversing solenoid valve, driving solenoid valve, main valve, controller, pressure transducer and speed probe; Wherein, Pioneer pump is communicated with the filler opening of Parking solenoid valve, the filler opening of reversing solenoid valve and the filler opening of driving solenoid valve respectively through throttle; The oil outlet of Parking solenoid valve is communicated with the filler opening of gear solenoid valve; The actuator port of the actuator port of reversing solenoid valve, driving solenoid valve is communicated with two hydraulic control ends of main valve respectively, and controller is electrically connected with Parking solenoid valve, gear solenoid valve, reversing solenoid valve, driving solenoid valve and pressure transducer and speed probe respectively; The main valve that said do-part is communicated with this main pump by main pump, filler opening, the oil hydraulic motor that is communicated with this main valve actuator port, the bottom gear hydraulic fluid port and the top gear hydraulic fluid port that are communicated with gear solenoid valve two actuator ports respectively constitute; Wherein, pressure transducer is located at the output terminal that main pump oil outlet place, speed probe are located at oil hydraulic motor.
Between pioneer pump and throttle, be provided with one-way valve.
Compare with existing technology, therefore the present invention can select manually or the self shifter pattern according to pavement behavior owing to adopted technique scheme.If select automatic automatic mode, gear can be selected gear automatically with the variation of main pump pressure, the speed of a motor vehicle, thereby realizes the vehicle to run stepless change, has alleviated driver's manipulation strength; Moreover; In the vehicle driving process, system of the present invention also can switch between hand gear or automatic speed changing, and not only dispense with parking can be shifted gears; And the gearshift response time is short, reliability is high, synchronous nothing is impacted, and has plurality of advantages such as simple in structure, that Operation and maintenance are convenient.In addition; Owing to be provided with speed probe and pressure transducer; Therefore no matter be to adopt manual shift or adopt the self shifter pattern; When needs switched between high, low speed, controller all will judge whether to satisfy the gearshift condition according to the signal of speed probe and pressure transducer feedback automatically, and changes top gear hydraulic fluid port or the low oil-feed route that hastens to keep off hydraulic fluid port through the switching of control gear solenoid valve; Thereby realize the high, low speed switching, help protecting control system to exempt from damage.
Description of drawings:
Fig. 1 is a structural principle schematic representation of the present invention;
Fig. 2 is a gearshift logical schematic of the present invention.
Among the figure: controller 1 main valve 2 bottom gear hydraulic fluid ports 3 top gear hydraulic fluid ports 4 oil hydraulic motors 5 speed probes 6 pressure transducers 7 main pumps 8 throttles 9 Parking solenoid valves 10 gear solenoid valves 11 reversing solenoid valves 12 driving solenoid valves 13 pioneer pumps 14 high one-way valves 15
Embodiment:Below in conjunction with accompanying drawing and concrete embodiment the present invention is described further:
As shown in Figure 1: control section is made up of pioneer pump 14, throttle 9, Parking solenoid valve 10, gear solenoid valve 11, reversing solenoid valve 12, driving solenoid valve 13, main valve 2, controller 1, pressure transducer 7 and speed probe 6; Wherein, Pioneer pump 14 is communicated with the filler opening of throttle 9 through oil pipe; The oil outlet of this throttle 9 is communicated with the filler opening of Parking solenoid valve 10, the filler opening of reversing solenoid valve 12 and the filler opening of driving solenoid valve 13 respectively through oil pipe; The oil outlet of Parking solenoid valve 10 is communicated with the filler opening of gear solenoid valve 11 through oil pipe; The actuator port of the actuator port of reversing solenoid valve 12, driving solenoid valve 13 is communicated with two hydraulic control ends of main valve 2 through oil pipe respectively, and controller 1 is electrically connected with Parking solenoid valve 10, gear solenoid valve 11, reversing solenoid valve 12, driving solenoid valve 13 and pressure transducer 7 and speed probe 6 respectively.The main valve 2 that do-part is communicated with this main pump through oil pipe by main pump 8, filler opening, the oil hydraulic motor 5 that is communicated with through two actuator ports of oil pipe and this main valve, the bottom gear hydraulic fluid port 3 that is communicated with the actuator port of gear solenoid valve 11 through oil pipe, constitute with the top gear hydraulic fluid port 4 that another actuator port of gear solenoid valve 11 is communicated with through oil pipe; Wherein, pressure transducer 7 is located at the oil outlet place of main pump 8, the output terminal that speed probe 6 is located at oil hydraulic motor 5.
For the ease of control, between pioneer pump 14 and throttle 9, be provided with one-way valve 15.
In the above-described embodiments, main valve 2 is three eight logical hydraulic control valve, and Parking solenoid valve 10, reversing solenoid valve 12 and driving solenoid valve 13 are two-position three-way valve, and gear solenoid valve 11 is two position four-way solenoid valves.The return opening of main valve 2, Parking solenoid valve 10, gear solenoid valve 11, reversing solenoid valve 12 and driving solenoid valve 13 is communicated with oil sump through oil pipe respectively.
Working principle: when operating grip is in Parking gear P, 10 outages of Parking solenoid valve, servo oil circuit is broken off, and is in the Parking state.
When operating grip is in reversing gear R, 12 energisings of reversing solenoid valve, servo oil passes through the hydraulic control end that this reversing solenoid valve gets into main valve 2 belows, this main valve switching-over; The pressure oil of main pump 8 is through the B actuator port of main valve 2 entering oil hydraulic motors 5, and this oil hydraulic motor reverses; Vehicle is in the reversing state.
When selecting the manual shift pattern, if operating grip is in the gear D that advances, 13 energisings of driving solenoid valve, servo oil passes through the hydraulic control end that this driving solenoid valve gets into main valve 2 tops, this main valve switching-over; The pressure oil of main pump 8 is through the A actuator port of main valve 2 entering oil hydraulic motors 5, and this oil hydraulic motor just changes, and vehicle is in forward travel state.At this moment, when being in high tap position D2 as if Joystick, 10 energisings of Parking solenoid valve, 11 outages of gear solenoid valve, servo oil gets into top gear hydraulic fluid port 4 through this gear solenoid valve; Step on walking throttle 9, vehicle is with the walking forward at a high speed of two retainings.At this moment, when being in low-grade location D1 as if Joystick, 10 energisings of Parking solenoid valve; (speed of a motor vehicle＜6km/h, main pump pressure＞280bar) whether satisfy then can be changed to bottom gear from top gear if satisfy to controller 1 automatic detection gearshift condition, and gear solenoid valve 11 is switched on, and servo oil passes through this gear solenoid valve and gets into bottom gear hydraulic fluid port 3; Step on walking throttle 9, vehicle is walked forward with a retaining low speed; Otherwise vehicle continues to keep fast state.
When adopting the manual shift pattern, controller 1 default system is in top gear.When need were changed to low speed at that time from top gear, whether controller 1 reaches gearshift condition (speed of a motor vehicle＜6km/h, main pump pressure＞280bar) according to speed probe 6, the automatic detection of pressure transducer 7 feedback data.If satisfy, then gear solenoid valve 11 energisings, servo oil gets into bottom gear hydraulic fluid port 3 through this gear solenoid valve; Deny the person, gear solenoid valve 11 continues to keep off-position, and vehicle continues high-speed travel.When need were changed at a high speed at that time from bottom gear, whether controller 1 reaches gearshift condition (speed of a motor vehicle＞9km/h, main pump pressure＜230bar) according to speed probe 6, the automatic detection of pressure transducer 7 feedback data.If satisfy, then gear solenoid valve 11 outages, servo oil gets into top gear hydraulic fluid port 4 through this gear solenoid valve; Deny the person, gear solenoid valve 11 continues to keep "on" position, and vehicle continues low speed and advances.
When selecting the self shifter pattern, controller 1 default system is in top gear.Controller 1 is judged current shift according to the main pump pressure and the speed of a motor vehicle: as if the speed of a motor vehicle＜6km/h, main pump pressure＞280bar, and 11 energisings of controller 1 control gear solenoid valve, servo oil gets into low speed gear hydraulic fluid port 3, and vehicle keeps off low speed with one and walks forward; If satisfy the speed of a motor vehicle＞9km/h, main pump pressure＜230bar, 11 outages of controller 1 control gear solenoid valve, servo oil gets into top gear hydraulic fluid port 4, and vehicle is with the walking forward at a high speed of two retainings.
If need automatic catch is changed to manual retaining or will manually keep off when being changed to automatic catch, controller 1 detects the break-make situation of gear solenoid valve 11, judges current shift automatically, switches to automatic or manual gearshift logical schema according to accompanying drawing 2 then between advancing:
A picture frame is the self shifter logic.When selecting automatic catch, the system default top gear, controller 1 detected the speed of a motor vehicle, main pump pressure and whether satisfied gearshift condition (speed of a motor vehicle＜6km/h, main pump pressure＞280bar) this moment.If do not satisfy, be regarded as and can not shift gears, system appointed and was in top gear this moment; Otherwise be regarded as and can shift gears, this moment, system was in bottom gear.When system was in bottom gear, controller 1 detected the speed of a motor vehicle, main pump pressure and whether satisfies gearshift condition (speed of a motor vehicle＞9km/h, main pump pressure＜230bar).If do not satisfy, be regarded as and can not shift gears, this moment, system still was in bottom gear; Otherwise be regarded as and can shift gears, this moment, system was in top gear.
No. two picture frames are the manual shift logic.When selecting manually retaining, the system default top gear when the speed of a motor vehicle=0km/h, can switch arbitrarily the high/low speed retaining.When between advancing, having gearshift to require, controller 1 detects the speed of a motor vehicle, whether main pump pressure satisfies condition.If do not satisfy, be regarded as and can not shift gears, this moment, system still was in top gear; Otherwise be regarded as and can shift gears, this moment, system was in bottom gear.When system was in bottom gear and have gearshift to require, controller detected the speed of a motor vehicle, whether main pump pressure satisfies condition.If do not satisfy, be regarded as and can not shift gears, this moment, system still was in bottom gear; Otherwise be regarded as and can shift gears, this moment, system was in top gear.
No. three picture frames are that a self shifter pattern of advancing transfers the logic of manual shift pattern to.When system has detected the switch mode signal, at first detect current shift, if this moment, system was in top gear, gear forwards the top gear of No. two picture frames to; If this moment, system was in bottom gear, gear forwards the bottom gear of No. two picture frames to.
No. four picture frames are that a manual shift pattern of advancing transfers the logic of self shifter pattern to.When system has detected the switch mode signal, at first detect current shift, if this moment, system was in top gear, gear forwards the top gear of a picture frame to; System is in bottom gear when this moment, and gear forwards the bottom gear of a picture frame to.
Claims (2)
1. hydraulic wheel excavator walking hand/, comprise control section and do-part from the one speed variator system; It is characterized in that: said control section is made up of pioneer pump (14), throttle (9), Parking solenoid valve (10), gear solenoid valve (11), reversing solenoid valve (12), driving solenoid valve (13), main valve (2), controller (1), pressure transducer (7) and speed probe (6); Wherein, Pioneer pump (14) is communicated with the filler opening of Parking solenoid valve (10), the filler opening of reversing solenoid valve (12) and the filler opening of driving solenoid valve (13) respectively through throttle (9); The oil outlet of Parking solenoid valve (10) is communicated with the filler opening of gear solenoid valve (11); The actuator port of the actuator port of reversing solenoid valve (12), driving solenoid valve (13) is communicated with two hydraulic control ends of main valve (2) respectively, and controller (1) is electrically connected with Parking solenoid valve (10), gear solenoid valve (11), reversing solenoid valve (12), driving solenoid valve (13) and pressure transducer (7) and speed probe (6) respectively; The main valve (2) that said do-part is communicated with this main pump by main pump (8), filler opening, the oil hydraulic motor (5) that is communicated with this main valve actuator port, the bottom gear hydraulic fluid port (3) that is communicated with gear solenoid valve (11) two actuator ports respectively and top gear hydraulic fluid port (4) constitute; Wherein, pressure transducer (7) is located at the oil outlet place of main pump (8), the output terminal that speed probe (6) is located at oil hydraulic motor (5).
2. hydraulic wheel excavator walking hand according to claim 1/, it is characterized in that: between pioneer pump (14) and throttle (9), be provided with one-way valve (15) from the one speed variator system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110253715.4A CN102359587B (en) | 2011-08-31 | 2011-08-31 | Manual and automatic integrated speed change system for wheel type hydraulic excavator |
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| CN201110253715.4A CN102359587B (en) | 2011-08-31 | 2011-08-31 | Manual and automatic integrated speed change system for wheel type hydraulic excavator |
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| CN102359587A true CN102359587A (en) | 2012-02-22 |
| CN102359587B CN102359587B (en) | 2014-03-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017309A (en) * | 2019-04-12 | 2019-07-16 | 江苏汇智高端工程机械创新中心有限公司 | Walking motor speed control system with manual and automatic gear shifting functions |
| CN112728067A (en) * | 2021-01-19 | 2021-04-30 | 厦门宇龙机械有限公司 | Wheel excavator and high-low gear shift protection system and method thereof |
| CN113236766A (en) * | 2021-05-14 | 2021-08-10 | 徐州徐工基础工程机械有限公司 | Continuous mining machine walking gear control method |
| CN113653783A (en) * | 2021-09-08 | 2021-11-16 | 湖北金诚信矿业服务有限公司 | Hydrostatic transmission and gear shifting system thereof |
Citations (6)
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| US5331812A (en) * | 1990-01-18 | 1994-07-26 | Kabushiki Kaisha Komatsu Seisakusho | Traveling speed changeover device for hydraulic excavator |
| US6182448B1 (en) * | 1994-09-09 | 2001-02-06 | Komatsu Ltd. | Speed changing device for hydraulic driving apparatus and speed change control method thereof |
| JP2002081540A (en) * | 2000-09-08 | 2002-03-22 | Hitachi Constr Mach Co Ltd | Speed control device for wheel type hydraulic traveling vehicle |
| CN201236945Y (en) * | 2007-12-27 | 2009-05-13 | 奇瑞汽车股份有限公司 | Hydraulic system of vehicle electric-controlled automatic mechanical speed variator |
| CN101914932A (en) * | 2010-08-04 | 2010-12-15 | 贵州詹阳动力重工有限公司 | Travelling automatic transmission of hydraulic wheel excavator |
| CN202215727U (en) * | 2011-08-31 | 2012-05-09 | 贵州詹阳动力重工有限公司 | Manual and automatic integrated transmission system for wheel type hydraulic excavator |
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2011
- 2011-08-31 CN CN201110253715.4A patent/CN102359587B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5331812A (en) * | 1990-01-18 | 1994-07-26 | Kabushiki Kaisha Komatsu Seisakusho | Traveling speed changeover device for hydraulic excavator |
| US6182448B1 (en) * | 1994-09-09 | 2001-02-06 | Komatsu Ltd. | Speed changing device for hydraulic driving apparatus and speed change control method thereof |
| JP2002081540A (en) * | 2000-09-08 | 2002-03-22 | Hitachi Constr Mach Co Ltd | Speed control device for wheel type hydraulic traveling vehicle |
| CN201236945Y (en) * | 2007-12-27 | 2009-05-13 | 奇瑞汽车股份有限公司 | Hydraulic system of vehicle electric-controlled automatic mechanical speed variator |
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| CN202215727U (en) * | 2011-08-31 | 2012-05-09 | 贵州詹阳动力重工有限公司 | Manual and automatic integrated transmission system for wheel type hydraulic excavator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017309A (en) * | 2019-04-12 | 2019-07-16 | 江苏汇智高端工程机械创新中心有限公司 | Walking motor speed control system with manual and automatic gear shifting functions |
| CN112728067A (en) * | 2021-01-19 | 2021-04-30 | 厦门宇龙机械有限公司 | Wheel excavator and high-low gear shift protection system and method thereof |
| CN113236766A (en) * | 2021-05-14 | 2021-08-10 | 徐州徐工基础工程机械有限公司 | Continuous mining machine walking gear control method |
| CN113236766B (en) * | 2021-05-14 | 2022-02-22 | 徐州徐工基础工程机械有限公司 | Continuous mining machine walking gear control method |
| CN113653783A (en) * | 2021-09-08 | 2021-11-16 | 湖北金诚信矿业服务有限公司 | Hydrostatic transmission and gear shifting system thereof |
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| CN102359587B (en) | 2014-03-05 |
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