CN102359587B - 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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- CN102359587B CN102359587B CN201110253715.4A CN201110253715A CN102359587B CN 102359587 B CN102359587 B CN 102359587B CN 201110253715 A CN201110253715 A CN 201110253715A CN 102359587 B CN102359587 B CN 102359587B
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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 for hydraulic wheel excavator.
background technique:as everyone knows, wheeled excavator conventionally all must first stop and just can carry out manual shift operation at present, not only there is the defects such as gearshift bothers, the gearshift response time is long, mobility is poor, driver's labor intensity is large, and travelling speed generally only has 30 kilometers/hour, can not adapt to the needs of current engineering machinery development.
summary of the invention:in order to overcome the defect existing in prior art, the present invention aims to provide a kind of hydraulic wheel excavator walking hand of gear shift operation/from one speed variator system of can carrying out without stopping manually or automatically.
To achieve these goals, the present invention by the following technical solutions: it comprises control section and do-part, described 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 by throttle respectively with the filler opening of parking solenoid valve, the filler opening of the filler opening of reversing solenoid valve and driving solenoid valve is communicated with, the oil outlet of parking solenoid valve is communicated with the filler opening of gear solenoid valve, the actuator port of reversing solenoid valve, the actuator port of driving solenoid valve is communicated with two hydraulic control ends of main valve respectively, controller respectively with parking solenoid valve, gear solenoid valve, reversing solenoid valve, driving solenoid valve, and pressure transducer and speed probe electrical connection, the main valve that described do-part is communicated with this main pump by main pump, filler opening, the oil hydraulic motor being 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 form, 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.
Compared with the prior art, the present invention, owing to having adopted technique scheme, therefore can select the pattern of shifting gears manually or automatically according to pavement behavior.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 vehicle to run stepless change, has alleviated driver's manipulation strength; Moreover, in Vehicle Driving Cycle process, system of the present invention also can be switched between hand gear or automatic speed changing, without parking, is not only shift-variable, and the gearshift response time is short, reliability is high, synchronous nothing is impacted, and has the plurality of advantages such as simple in structure, Operation and maintenance are convenient.In addition; owing to being provided with speed probe and pressure transducer; therefore no matter be to adopt manual shift or adopt self shifter pattern; when needs switch between high, low speed; whether controller all will meet gearshift condition according to the signal automatic decision of speed probe and pressure transducer feedback; and change top gear hydraulic fluid port or the low oil-feed route that hastens to keep off hydraulic fluid port by controlling the switching of gear solenoid valve; thereby realize high, low speed, switch, be conducive to Protection control system and exempt from damage.
accompanying drawing explanation:
Fig. 1 is structural principle schematic diagram of the present invention;
Fig. 2 is gearshift logical schematic of the present invention.
In figure: the high one-way valve 15 of controller 1 main valve 2 bottom gear hydraulic fluid port 3 top gear hydraulic fluid port 4 oil hydraulic motor 5 speed probe 6 pressure transducer 7 main pump 8 throttle 9 parking solenoid valve 10 gear solenoid valve 11 reversing solenoid valve 12 driving solenoid valve 13 pioneer pump 14
embodiment:below in conjunction with accompanying drawing and specific embodiment, the invention will be further described:
As shown in Figure 1: control section consists 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 by oil pipe, the oil outlet of this throttle 9 by oil pipe respectively with the filler opening of parking solenoid valve 10, the filler opening of the filler opening of reversing solenoid valve 12 and driving solenoid valve 13 is communicated with, the oil outlet of parking solenoid valve 10 is communicated with the filler opening of gear solenoid valve 11 by oil pipe, the actuator port of reversing solenoid valve 12, the actuator port of driving solenoid valve 13 is communicated with two hydraulic control ends of main valve 2 by oil pipe respectively, controller 1 respectively 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 electrical connections.The main valve 2 that do-part is communicated with this main pump by oil pipe by main pump 8, filler opening, the oil hydraulic motor 5 being communicated with by two actuator ports of oil pipe and this main valve, the bottom gear hydraulic fluid port 3 being communicated with the actuator port of gear solenoid valve 11 by oil pipe, by oil pipe, form with the top gear hydraulic fluid port 4 that another actuator port of gear solenoid valve 11 is communicated with; 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 controlling, 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 by oil pipe respectively.
Working principle: when operating grip is during in parking gear P, 10 power-off of parking solenoid valve, servo oil circuit disconnects, in parking state.
When operating grip is when moveing backward gear R, 12 energisings of reversing solenoid valve, servo oil enters the hydraulic control end of main valve 2 belows by this reversing solenoid valve, this main valve commutation; The pressure oil of main pump 8 enters the B actuator port of oil hydraulic motor 5 by main valve 2, this oil hydraulic motor reversion; Vehicle is in reversing state.
When selecting manual shift pattern, if operating grip in the gear D that advances, 13 energisings of driving solenoid valve, servo oil enters the hydraulic control end of main valve 2 tops by this driving solenoid valve, this main valve commutates; The pressure oil of main pump 8 enters the A actuator port of oil hydraulic motor 5 by main valve 2, this oil hydraulic motor forward, and vehicle is in forward travel state.Now, if Joystick when high tap position D2, parking solenoid valve 10 energising, 11 power-off of gear solenoid valve, servo oil enters top gear hydraulic fluid port 4 by this gear solenoid valve; Step on walking throttle 9, vehicle is with the walking forward at a high speed of two gears.Now, if Joystick when low-grade location D1, parking solenoid valve 10 energising; Whether controller 1 automatically detects gearshift condition (speed of a motor vehicle < 6km/h, main pump pressure > 280bar) and meets, if satisfied can be changed to bottom gear from top gear, 11 energisings of gear solenoid valve, servo oil enters bottom gear hydraulic fluid port 3 by this gear solenoid valve; Step on walking throttle 9, vehicle is walked forward with a gear low speed; Otherwise vehicle continues to maintain fast state.
While adopting manual shift pattern, controller 1 default system is in top gear.When being 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 the automatic detection of data of speed probe 6, pressure transducer 7 feedbacks.If meet, gear solenoid valve 11 energisings, servo oil enters bottom gear hydraulic fluid port 3 by this gear solenoid valve; No person, gear solenoid valve 11 continues to maintain off-position, and vehicle continues to advance at a high speed.When being 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 the automatic detection of data of speed probe 6, pressure transducer 7 feedbacks.If meet, gear solenoid valve 11 power-off, servo oil enters top gear hydraulic fluid port 4 by this gear solenoid valve; No person, gear solenoid valve 11 continues to maintain "on" position, and vehicle continues low speed and advances.
When selecting self shifter pattern, controller 1 default system is in top gear.Controller 1 judges current shift according to main pump pressure and the speed of a motor vehicle: if speed of a motor vehicle < is 6km/h, main pump pressure > 280bar, controller 1 is controlled 11 energisings of gear solenoid valve, servo oil enters low speed gear hydraulic fluid port 3, and vehicle is walked forward with a gear low speed; If meet speed of a motor vehicle > 9km/h, main pump pressure < 230bar, controller 1 is controlled 11 power-off of gear solenoid valve, and servo oil enters top gear hydraulic fluid port 4, and vehicle is with the walking forward at a high speed of two gears.
When if desired automatic catch being changed to manual gear between advancing or manual gear being changed to automatic catch, controller 1 detects the break-make situation of gear solenoid valve 11, and then automatic decision current shift 2 is switched to automatic or manual gearshift logical schema with reference to the accompanying drawings:
A picture frame is self shifter logic.When selecting automatic catch, system default top gear, this Time Controller 1 detects the speed of a motor vehicle, whether main pump pressure meets gearshift condition (speed of a motor vehicle < 6km/h, main pump pressure > 280bar).If do not meet, be considered as not shift-variable, now system is appointed in top gear; Otherwise be considered as shift-variable, now system is in bottom gear.When system is during in bottom gear, controller 1 detects the speed of a motor vehicle, whether main pump pressure meets gearshift condition (speed of a motor vehicle > 9km/h, main pump pressure < 230bar).If do not meet, be considered as not shift-variable, now system is still in bottom gear; Otherwise be considered as shift-variable, now system is in top gear.
No. two picture frames are manual shift logic.When selecting manual gear, system default top gear, when the speed of a motor vehicle=0km/h, can switch arbitrarily high/low speed gear.While having gearshift to require between advancing, controller 1 detects the speed of a motor vehicle, whether main pump pressure satisfies condition.If do not meet, be considered as not shift-variable, now system is still in top gear; Otherwise be considered as shift-variable, now system is in bottom gear.When system is in bottom gear and have gearshift while requiring, controller detects the speed of a motor vehicle, whether main pump pressure satisfies condition.If do not meet, be considered as not shift-variable, now system is still in bottom gear; Otherwise be considered as shift-variable, now system is 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 switch mode signal, first detect current shift, if now system is in top gear, gear forwards the top gear of No. two picture frames to; If now system is 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 switch mode signal, first detect current shift, if now system is in top gear, gear forwards the top gear of a picture frame to; When now system is in bottom gear, gear forwards the bottom gear of a picture frame to.
Claims (2)
1. hydraulic wheel excavator walking hand/from an one speed variator system, comprise control section and do-part, it is characterized in that: described control section is by 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) form, wherein, pioneer pump (14) by throttle (9) respectively with the filler opening of parking solenoid valve (10), the filler opening of the filler opening of reversing solenoid valve (12) and driving solenoid valve (13) is communicated with, the oil outlet of parking solenoid valve (10) is communicated with the filler opening of gear solenoid valve (11), the actuator port of reversing solenoid valve (12), the actuator port of driving solenoid valve (13) is communicated with two hydraulic control ends of main valve (2) respectively, controller (1) respectively 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) electrical connection, the main valve (2) that described do-part is communicated with this main pump by main pump (8), filler opening, the oil hydraulic motor (5) being communicated with this main valve actuator port, the bottom gear hydraulic fluid port (3) being communicated with gear solenoid valve (11) two actuator ports respectively and top gear hydraulic fluid port (4) form, 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 according to claim 1 walking hand/from one speed variator system, it is characterized in that: be provided with one-way valve (15) between pioneer pump (14) and throttle (9).
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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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| Application Number | Priority Date | Filing Date | Title |
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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 CN102359587A (en) | 2012-02-22 |
| CN102359587B true CN102359587B (en) | 2014-03-05 |
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| CN201110253715.4A Active CN102359587B (en) | 2011-08-31 | 2011-08-31 | Manual and automatic integrated speed change system for wheel type hydraulic excavator |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017309B (en) * | 2019-04-12 | 2020-04-17 | 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 |
| 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 |
Citations (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081540A (en) * | 2000-09-08 | 2002-03-22 | Hitachi Constr Mach Co Ltd | Speed control device for wheel type hydraulic traveling vehicle |
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2011
- 2011-08-31 CN CN201110253715.4A patent/CN102359587B/en active Active
Patent Citations (5)
| 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 |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-81540A 2002.03.22 |
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