CN202627061U - Hydraulic driving wheel type excavator gear-shifting device - Google Patents
Hydraulic driving wheel type excavator gear-shifting device Download PDFInfo
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- CN202627061U CN202627061U CN 201220015908 CN201220015908U CN202627061U CN 202627061 U CN202627061 U CN 202627061U CN 201220015908 CN201220015908 CN 201220015908 CN 201220015908 U CN201220015908 U CN 201220015908U CN 202627061 U CN202627061 U CN 202627061U
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- solenoid operated
- operated directional
- directional valve
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Abstract
The utility model relates to a hydraulic driving wheel type excavator gear-shifting device which comprises a walking hydraulic pump (2), a brake valve (3), a walking motor (4), a multipath valve (9), a gearbox (10), a first electromagnetic directional valve (11), a second electromagnetic directional valve (12), a third electromagnetic directional valve (13), a walking control valve (14), a hydraulic pump (1), a first pressure switch (DS1), a second pressure switch (DS2) and a third pressure switch (DS3), wherein the multipath valve (9) is located on an oil path between the walking hydraulic pump (2) and the walking motor (4); the gearbox (10) is provided with a gear-shifting slide tooth sleeve (7), a gear-shifting fork (6), a gear-shifting cylinder (8) and a gear-shifting locking valve (5) and is connected with the walking motor (4); the first electromagnetic directional valve (11) is located between the brake valve (3) and the gear-shifting locking valve (5); the second electromagnetic directional valve (12) is located between the brake valve (3) and the gear-shifting cylinder (8); the third electromagnetic directional valve (13) is connected with a guiding oil port of the multipath valve (9); the walking control valve (14) is used for controlling an oil supply volume of the third electromagnetic directional valve (13); the hydraulic pump (1) is used for supplying hydraulic oil to the brake valve (3), the first electromagnetic directional valve (11), the second electromagnetic directional valve (12) and the walking control valve (14); the first pressure switch (DS1) is mounted at an outlet of the brake valve (3); the second pressure switch (DS2) is mounted on an oil return pipe of the gear-shifting locking valve (5); and the third pressure switch (DS3) is mounted on an oil outlet pipeline of the walking control valve (14).
Description
Technical field
The utility model relates to a kind of motor vehicle gear changing device, especially relates to a kind of gearshift of hydraulic-driven wheel excavator.
Background technology
Wheeled excavator obtains using in increasing urban engineering project because its transition is convenient at present.The walking of wheel excavator drives gearbox and generally adopts mechanical gearbox general in the industry, when shift control, need under dead ship condition, use the control mode of machinery or hydraulic pressure to carry out shift control.The gearbox designs that mechanical type shift control mode is used is simple, cost is low, uses gear shifting handle to carry out gear shift but need walk out driver's cabin during gear shift, and very inconvenience and operating efficiency are low; The hydraulic shift mode is carried out shift control through hydraulic control system in drivers' cab, improved operating efficiency, has improved the class of excavator simultaneously.But; Owing to need in the walking process to use latch that gear shift machinery in the gearbox is carried out mechanical caging; When gear shift, extract latch earlier and carry out shift control again; The manipulation of can walking after gear shift puts in place, several actions have strict sequencing, otherwise shift control can not be successfully perhaps causes damage to latch, geared machine and the gear shift machinery etc. of excavator.
CN201180277Y discloses a kind of selector device of wheel excavator; The hydraulicdirectional control valve handle that includes lock pin, gear shifting handle and connect with the gear shifting handle lower ends, the hydraulic pressure reversing handle is positioned at an end of hydraulicdirectional control valve; It is characterized in that having a shift fork to be positioned at the lower end of said gear shifting handle; Said hydraulicdirectional control valve handle is positioned at the shift fork lower end, and the relative part with the hydraulicdirectional control valve handle of shift fork periphery is provided with recess, and the upper end of hydraulicdirectional control valve handle is positioned at this recess; The other end of shift fork is provided with the one stroke switch, is provided with the travel switch roller near the shift fork part on the travel switch, and the relative part with the travel switch roller of shift fork periphery is provided with recess, and the travel switch roller is positioned at this recess; The upper end of relative part shifter hub with the travel switch roller also is provided with a recess at the shift fork periphery; Travel switch is connected through circuit with the electromagnetic valve of pulling pin, and the electromagnetic valve of pulling pin is connected with said lock pin.Mechanism principle of techniques make use that this patent is announced has solved the problem of pulling pin with two actions of shift control sequencing; But solved the sequencing problem of pulling pin from the technology of announcing with gear shift; But might in traveling process, cause maloperation, damage geared machine this mechanism; In addition, whether this mechanism can't mesh after the gear shift of detection of gear mechanism fully, under the state that gear does not mesh fully, walks to handle and also can cause damage to the geared machine and the shifter of gearbox.
The utility model content
The utility model technical problem to be solved is to provide a kind of gearshift of hydraulic-driven wheel excavator.Realize just carrying out shift control excavator is removed locking under dead ship condition after, the manipulation of just walking after the assurance gear drive meshes fully and puts in place avoids gearshift procedure that gearbox gear transmission mechanism and shifter are caused damage; Improve operating efficiency and handling comfort simultaneously.
In order to solve the problems of the technologies described above, a kind of hydraulic-driven wheel excavator gearshift that the utility model provides comprises the walking hydraulic pump; Brake valve; Running motor; Banked direction control valves on hydraulic circuit between said walking hydraulic pump and the said running motor; With the gearbox that said running motor driving shaft is connected, said gearbox has the gear shift sliding gear collar, with the selector fork that said gear shift sliding gear collar is connected, drives the gear shifting oil cylinder of said selector fork action; Be used to realize the gear shift lock valve of said selector fork mechanical position limitation or releasing; First solenoid operated directional valve on hydraulic circuit between said brake valve and said gear shift lock valve first oil-in; Second solenoid operated directional valve on hydraulic circuit between said brake valve and the said gear shifting oil cylinder; The 3rd solenoid operated directional valve of guide oil is provided for said banked direction control valves; On pipeline between said brake valve and said the 3rd solenoid operated directional valve, control the walking control valve of said the 3rd solenoid operated directional valve fuel delivery; The hydraulic pump of hydraulic oil is provided for said brake valve, first solenoid operated directional valve, second solenoid operated directional valve and walking control valve; Be installed on first pressure switch on the said brake valve brake oil export pipeline; Be installed on second pressure switch on the said gear shift lock valve return line; Be installed on the 3rd pressure switch on the fuel-displaced pipeline of walking control valve; Second oil-in of said gear shift lock valve is connected through oil circuit with the outlet of the brake oil of said brake valve.
Further; Hydraulic-driven wheel excavator gearshift has the electrical control system by the electromagnetic coil formation of the electromagnetic coil of the electromagnetic coil that comprises said first pressure switch (DS1), second pressure switch (DS2), the 3rd pressure switch (DS3), first solenoid operated directional valve (11), second solenoid operated directional valve (12), the 3rd solenoid operated directional valve (13); Said electrical control system comprises that parallel connection inserts three loops of dc power anode; First loop comprises that input inserts positive source and has the forward-reverse gauge tap that advances, retreats the contact; The contact of advancing is electrically connected with wiring one end of first electromagnetic coil of said the 3rd solenoid operated directional valve; Retreat the contact and be electrically connected with wiring one end of second electromagnetic coil of said the 3rd solenoid operated directional valve, the wiring other end of first electromagnetic coil, second electromagnetic coil connects ground connection after normally closed second pressure switch; Second loop comprises that series connection inserts first pressure switch and the pressure Gear-shift switch that resets certainly of positive source; Said Gear-shift switch has I shelves, two contacts of II shelves; Wiring one end of second electromagnetic coil on I shelves contact and said second solenoid operated directional valve is electrically connected, wiring one end of second electromagnetic coil on II shelves contact and said first solenoid operated directional valve is electrically connected the wiring other end ground connection of first electromagnetic coil, second electromagnetic coil; Tertiary circuit comprises the 3rd pressure switch that inserts positive source, and the 3rd pressure switch is electrically connected with wiring one end of the electromagnetic coil of said first solenoid operated directional valve, the wiring other end ground connection of electromagnetic coil.
The utility model hydraulic-driven wheel excavator gearshift brings following beneficial effect: hydraulic system comprises travel driving system, walk control system, brakes and gear shift put parts such as signal detection system in place; Be provided with pressure switch in the hydraulic system; Realize the protection of excavator shift control through the state that switches on and off of pressure switch, avoid the geared machine of gearbox and shifter to cause damage.
Description of drawings
The accompanying drawing that constitutes the part of the utility model is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation of embodiment 1 hydraulic-driven wheel excavator gearshift;
Fig. 2 is the electrical system architecture sketch map of embodiment 1.
The specific embodiment
Referring to Fig. 1, hydraulic-driven wheel excavator gearshift comprises walking hydraulic pump 2; Brake valve 3; Bidirectional variable running motor 4; The hydraulic pump 1 of hydraulic oil is provided for brake valve 3, solenoid operated directional valve 11, solenoid operated directional valve 12 and walking control valve 14; Three six logical pilot operated valve device banked direction control valves 9 are on the hydraulic circuit between walking hydraulic pump 2 and the running motor 4, and the oil-in of banked direction control valves 9 is connected with the outlet of hydraulic pump 2 through oil circuit, and two oil-outs of banked direction control valves 9 are connected with the hydraulic fluid port of bidirectional variable running motor 4; Gearbox 10 is connected with the driving shaft of running motor 4; Gearbox 10 has gear shift sliding gear collar 7; The selector fork 6 that is connected with gear shift sliding gear collar 7 drives the gear shifting oil cylinder 8 that selector fork 6 moves, and is used to realize the gear shift lock valve 5 of selector fork 6 mechanical position limitations or releasing; Solenoid operated directional valve 11 is on the hydraulic circuit between brake valve 3 and the gear shift lock valve 5, and solenoid operated directional valve 11 is the two-position three way solenoid operated directional valve, and its inlet is connected with the fuel-displaced N mouth of brake valve 3, and outlet is connected with the first hydraulic oil import A mouth of gear shift lock valve 5; Solenoid operated directional valve 12 is the 3-position 4-way solenoid operated directional valve, on the hydraulic circuit between said brake valve 3 and the gear shifting oil cylinder 8; Solenoid operated directional valve 13 is the 3-position 4-way solenoid operated directional valve, is connected with banked direction control valves 9 guide's hydraulic fluid ports; The oil-out of walking control valve 14 is connected through oil circuit with the oil-in of solenoid operated directional valve 13, can control solenoid operated directional valve 13 provides guide's oil mass for banked direction control valves 9 size through handling walking control valve 14; Pressure switch DS1 is installed on the brake valve 3 brake oil export pipelines; Pressure switch DS2 is installed on the oil return pipe of gear shift lock valve 5; Pressure switch DS3 is installed on the fuel-displaced pipeline of walking control valve 14.
Referring to Fig. 2; Hydraulic-driven wheel excavator gearshift has the electrical control system that the electromagnetic coil by the electromagnetic coil that comprises the electromagnetic coil of often driving pressure switch DS1, normally closed pressure switch DS2, normally closed pressure switch DS3, first solenoid operated directional valve 11, second solenoid operated directional valve 12, the 3rd solenoid operated directional valve 13 constitutes; Said electrical control system comprises that parallel connection inserts three loops of dc power anode; First loop comprises that input inserts the forward-reverse gauge tap 16 that positive source has the F that advances, retreats the R contact; The contact F that advances is electrically connected with wiring one end of the electromagnetic coil DT3 of said solenoid operated directional valve 13; Retreat contact R and be electrically connected, ground connection behind the wiring other end connection pressure switch DS2 of electromagnetic coil DT3, DT4 with wiring one end of the electromagnetic coil DT4 of said solenoid operated directional valve 13; Second loop comprises that input inserts the pressure switch DS1 of positive source; Input connects the pressure Gear-shift switch 15 that resets certainly of pressure switch DS1 output; Said Gear-shift switch 15 has I shelves K1, two contacts of II shelves K2; I shelves contact K1 is electrically connected with electromagnetic coil DT2 wiring one end on the solenoid operated directional valve 12, II shelves contact K2 is electrically connected the wiring other end ground connection of electromagnetic coil DT1, DT2 with electromagnetic coil DT1 wiring one end on the solenoid operated directional valve 12; Tertiary circuit comprises that input inserts the pressure switch DS3 of positive source, and the output of pressure switch DS3 is electrically connected with wiring one end of the electromagnetic coil DT5 of solenoid operated directional valve 11, the wiring other end ground connection of electromagnetic coil DT5.
When the hydraulic-driven wheeled excavator is in dead ship condition; Under the situation that does not have brake activation valve 3, brake valve 3 mediates, and brake valve 3 breaks off to the oil circuit between the gear shift lock valve 5B mouth; Pressure switch DS1 is in off-state; The common port of Gear-shift switch 15 and positive source break off, the electromagnetic coil DT1 on the solenoid operated directional valve 12, DT2 dead electricity, and can't carry out gear-change operation this moment; Pressure switch DS2 is in closure state, and the electromagnetic coil DT3 of solenoid operated directional valve 13, DT4 and power cathode conducting can make excavator be in to advance or retreat transport condition through the control to solenoid operated directional valve 13; Do not handling under the situation of walking control valve 14; Walking control valve 14 mediates, control valve 14 disconnections of being walked of the oil circuit between hydraulic pump 1 and the solenoid operated directional valve 13, and pressure switch DS3 is in closure state; The electromagnetic coil DT5 of solenoid operated directional valve 11 gets; Solenoid operated directional valve 11 is operated in the X position, and first spool 5.2 of gear shift lock valve 5 promotes the mechanical position limitation function of second spool, 5.3 maintenances of gear shift lock valve 5 to selector fork 6 under the active force effect of spring 5.1.
The parking gear shift course of work: excavator is in dead ship condition, and the hydraulic fluid that hydraulic pump 1 provides flows to the P mouth of brake valve 3, step on brake valve 3 after, hydraulic fluid flows to propons, back axle braking hydraulic fluid port through BR1 mouth and BR2 mouth respectively; Flow to the second import B mouth of gear shift lock valve 5 simultaneously through oil circuit; The active force that the spool 5.3 that promotes gear shift lock valve 5 overcomes spring 5.1 in the effect of hydraulic coupling is to moving away from selector fork 6 directions, and the mechanical position limitation function of the selector fork 6 of 5 pairs of gearboxes 10 of gear shift lock valve is removed; Under this state; Pressure switch DS1 is in closure state under the brake pressure effect; The common port of Gear-shift switch 15 and positive source conducting, when the I shelves K1 contact by lower-pilot Gear-shift switch 15, then the electromagnetic coil DT2 on the solenoid operated directional valve 12 connects; Solenoid operated directional valve 12 is operated in the Y position; The hydraulic fluid that hydraulic pump 1 provides flows to the rodless cavity of gear shifting oil cylinder 8 successively through the N of brake valve 3 mouth, second solenoid operated directional valve 12, gear shifting oil cylinder 8 is moved to the left under the active force of hydraulic oil, and the driving selector fork 6, the gear shift sliding gear collar 7 that drive gearbox simultaneously are moved to the left; The axle of power shaft I and gear VII separates, and this moment, the power transmission route of gearbox 10 was: power shaft I → gear II → gear III → gear V → gear VI → gear VII → gear VIII → output shaft IX; As II shelves contact K2 by lower-pilot Gear-shift switch 15; Then the electromagnetic coil DT1 on the solenoid operated directional valve 12 connects; Second solenoid operated directional valve 12 is operated in the X position, and the hydraulic fluid that hydraulic pump 1 provides flows to the rod chamber of gear shifting oil cylinder 8 through the N of brake valve 3 mouth, solenoid operated directional valve 12, and gear shifting oil cylinder 8 moves right under the active force of hydraulic oil; The driving selector fork 6, the gear shift sliding gear collar 7 that drive gearbox simultaneously move right; Under the effect of sliding gear collar 7, the axle of power shaft I and gear VII is affixed, and the drive path of gearbox 10 is changed into second gear and passed the shelves route: power shaft I → gear VII → gear VIII → output shaft IX.Behind the shift end; Take-off the brake valve 3, brake valve 3 resets, and the fuel feeding of BR1 mouth, BR2 mouth oil circuit and hydraulic pump 1 is cut off; Act on spool 5.3 and remove to the active force that moves away from selector fork 6 directions this moment; The spool 5.2 of shift lock valve 5 resets under spring 5.1 effects with spool 5.3, realizes the mechanical position limitation effect to selector fork 6, and the gear-change operation process finishes.
When the situation that gear shifting oil cylinder 8 does not move into place fully occurring, promptly gear shift sliding gear collar 7 does not engage fully and puts in place, under this state in the shift control process; When brake valve 3 brake off power; The spool 5.3 of shift lock valve 5 can not be reset to the lock position by the boss jack-up of selector fork 6, and the A mouth and the C mouth of shift lock valve 5 are in on-state; At this state if the manipulation of walking; Promptly step on walking control valve 14, the hydraulic fluid that hydraulic pump 1 provides flows to the oil-feed hydraulic fluid port of gear shift solenoid operated directional valve 13 through brake valve 3, walking control valve 14, and the pressure switch DS3 oil effect that is stressed is broken off; The electromagnetic coil DT5 of solenoid operated directional valve 11 and positive source break off, and solenoid operated directional valve 11 is operated in the Y position; The hydraulic fluid that hydraulic pump 1 provides is through the A mouth of brake valve N mouth, solenoid operated directional valve 11, shift lock valve 5; The C mouth of shift lock valve 5 refluxes; The be under pressure effect of oil of pressure switch DS2 is in off-state, the electromagnetic coil DT3 of solenoid operated directional valve 13, DT4 and power cathode disconnection, the spool of solenoid operated directional valve 13 operating position that can only mediate; Can not guide oil be provided for banked direction control valves 9; Banked direction control valves 9 supplies to be in dissengaged positions toward the oil circuit of running motor 4, and excavator can not be realized walking when gear shift was not in place, thereby realizes that when gear shift is not in place be that excavator provides protection.
In the walking process; The hydraulic fluid that is provided by hydraulic pump 1 flows to the oil-in of solenoid operated directional valve 13 behind the N of brake valve 3 mouth, walking control valve 14; The normally closed pressure switch DS3 oil effect of being stressed is broken off; The electromagnetic coil DT5 of solenoid operated directional valve 11 and positive source break off, and solenoid operated directional valve 11 is operated in the Y position; The fluid that hydraulic pump 1 provides is pressed through brake valve 3, solenoid operated directional valve 11, gets into the D chamber of shift lock valve 5, and hydraulic pressure forms an active force to the spool 5.3 of gear shift lock-up valve 5.At this moment; Even after stepping on down walking control valve 14, after there was brake oil hydraulic pressure in the B of shift lock valve 5 mouth, braking oil pressure can not overcome the hydraulic pressure in D chamber and the acting in conjunction power that spring 5.2 is transmitted to spool 5.3 to the active force of spool 5.3; The spool 5.3 of shift lock valve 5 still keeps the locking to selector fork 6; In the case, though misoperation Gear-shift switch can not realize gear shift at walking process, thereby avoid the gear drive and the shifter of gearbox are caused damage.
The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all should be included within the protection domain of the utility model.
Claims (2)
1. a hydraulic-driven wheel excavator gearshift comprises walking hydraulic pump (2); Brake valve (3); Running motor (4); Be positioned at the banked direction control valves (9) on the hydraulic circuit between said walking hydraulic pump (2) and the said running motor (4); The gearbox (10) that is connected with said running motor (4) driving shaft; It is characterized in that: said gearbox (10) has gear shift sliding gear collar (7); The selector fork (6) that is connected with said gear shift sliding gear collar (7) drives the gear shifting oil cylinder (8) that said selector fork (6) moves; Also comprise the gear shift lock valve (5) that is used to realize said selector fork (6) mechanical position limitation or releasing; Be positioned at first solenoid operated directional valve (11) on the hydraulic circuit between said brake valve (3) and said gear shift lock valve (5) first oil-ins (A); Be positioned at second solenoid operated directional valve (12) on the hydraulic circuit between said brake valve (3) and the said gear shifting oil cylinder (8); The 3rd solenoid operated directional valve (13) of guide oil is provided for said banked direction control valves (9); Be positioned between said brake valve (3) and said the 3rd solenoid operated directional valve (13) on the pipeline, control the walking control valve (14) of said the 3rd solenoid operated directional valve (13) fuel delivery; The hydraulic pump (1) of hydraulic oil is provided for said brake valve (3), first solenoid operated directional valve (11), second solenoid operated directional valve (12) and walking control valve (14); Be installed on first pressure switch (DS1) on said brake valve (3) the brake oil export pipeline; Be installed on second pressure switch (DS2) on said gear shift lock valve (5) return line; Be installed on the 3rd pressure switch (DS3) on the fuel-displaced pipeline of walking control valve (14); Second oil-in (B) of said gear shift lock valve (5) is connected through oil circuit with the outlet of the brake oil of said brake valve (3).
2. according to the said hydraulic-driven wheel excavator of claim 1 gearshift; Has the electrical control system that the electromagnetic coil by the electromagnetic coil of the electromagnetic coil that comprises said first pressure switch (DS1), second pressure switch (DS2), the 3rd pressure switch (DS3), first solenoid operated directional valve (11), second solenoid operated directional valve (12), the 3rd solenoid operated directional valve (13) constitutes; It is characterized in that: said electrical control system comprises that parallel connection inserts three loops of dc power anode; First loop comprises that input inserts the forward-reverse gauge tap (16) that positive source has advance (F), retreats (R) contact; The contact (F) of advancing is electrically connected with wiring one end of first electromagnetic coil (DT3) of said the 3rd solenoid operated directional valve (13); Retreat contact (R) and be electrically connected with wiring one end of second electromagnetic coil (DT4) of said the 3rd solenoid operated directional valve (13), the wiring other end of first electromagnetic coil (DT3), second electromagnetic coil (DT4) connects normally closed second pressure switch (DS2) back ground connection; Second loop comprises that series connection inserts first pressure switch (DS1) and the pressure Gear-shift switch (15) that resets certainly of positive source; Said Gear-shift switch (15) has I shelves (K1), two contacts of II shelves (K2); Wiring one end of first electromagnetic coil (DT2) on I shelves contact (K1) and said second solenoid operated directional valve (12) is electrically connected, wiring one end of second electromagnetic coil (DT1) on II shelves contact (K2) and said second solenoid operated directional valve (12) is electrically connected the wiring other end ground connection of first electromagnetic coil (DT1), second electromagnetic coil (DT2); Tertiary circuit comprises the 3rd pressure switch (DS3) that inserts positive source, and the 3rd pressure switch (DS3) is electrically connected with wiring one end of the electromagnetic coil (DT5) of said first solenoid operated directional valve (11), the wiring other end ground connection of electromagnetic coil (DT5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220015908 CN202627061U (en) | 2012-01-16 | 2012-01-16 | Hydraulic driving wheel type excavator gear-shifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220015908 CN202627061U (en) | 2012-01-16 | 2012-01-16 | Hydraulic driving wheel type excavator gear-shifting device |
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| Publication Number | Publication Date |
|---|---|
| CN202627061U true CN202627061U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220015908 Expired - Fee Related CN202627061U (en) | 2012-01-16 | 2012-01-16 | Hydraulic driving wheel type excavator gear-shifting device |
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| CN (1) | CN202627061U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850286A (en) * | 2014-02-25 | 2014-06-11 | 华侨大学 | Electrically-driven hydraulic excavator negative flow system based on metering pump |
| CN103950855A (en) * | 2014-04-10 | 2014-07-30 | 中煤科工集团西安研究院有限公司 | Electro-hydraulic joint controlled rotary arm limiting device |
| CN106321806A (en) * | 2016-09-26 | 2017-01-11 | 华能伊敏煤电有限责任公司 | Manual gear shifting device of automatic gearbox of dump truck |
| CN109058453A (en) * | 2018-09-06 | 2018-12-21 | 张祝 | A kind of liquid transmission control method of the real-time automatic adjustment amount of changing oil |
| CN112709283A (en) * | 2020-12-29 | 2021-04-27 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control system and control method for pure electric loader |
-
2012
- 2012-01-16 CN CN 201220015908 patent/CN202627061U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850286A (en) * | 2014-02-25 | 2014-06-11 | 华侨大学 | Electrically-driven hydraulic excavator negative flow system based on metering pump |
| CN103850286B (en) * | 2014-02-25 | 2016-05-18 | 华侨大学 | A kind of electric drive hydraulic crawler excavator minus flow system based on constant displacement pump |
| CN103950855A (en) * | 2014-04-10 | 2014-07-30 | 中煤科工集团西安研究院有限公司 | Electro-hydraulic joint controlled rotary arm limiting device |
| CN106321806A (en) * | 2016-09-26 | 2017-01-11 | 华能伊敏煤电有限责任公司 | Manual gear shifting device of automatic gearbox of dump truck |
| CN106321806B (en) * | 2016-09-26 | 2018-10-12 | 华能伊敏煤电有限责任公司 | Manual gear shifting device of automatic gearbox of dump truck |
| CN109058453A (en) * | 2018-09-06 | 2018-12-21 | 张祝 | A kind of liquid transmission control method of the real-time automatic adjustment amount of changing oil |
| CN109058453B (en) * | 2018-09-06 | 2019-12-03 | 张祝 | A kind of liquid transmission control method of the real-time automatic adjustment amount of changing oil |
| CN112709283A (en) * | 2020-12-29 | 2021-04-27 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control system and control method for pure electric loader |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20190116 |