CN106704583A - Automatic gear shifting mechanism of wheel type mechanical walking excavator and wheel type mechanical walking excavator - Google Patents
Automatic gear shifting mechanism of wheel type mechanical walking excavator and wheel type mechanical walking excavator Download PDFInfo
- Publication number
- CN106704583A CN106704583A CN201710006795.0A CN201710006795A CN106704583A CN 106704583 A CN106704583 A CN 106704583A CN 201710006795 A CN201710006795 A CN 201710006795A CN 106704583 A CN106704583 A CN 106704583A
- Authority
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- Prior art keywords
- magnetic valve
- cylinder
- excavator
- gearshift
- gas circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/42—Ratio indicator devices
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses an automatic gear shifting mechanism of a wheel type mechanical walking excavator and the wheel type mechanical walking excavator. The mechanism comprises an operating panel, electromagnetic valves and air cylinders. The electromagnetic valves comprise an electromagnetic valve A, an electromagnetic valve B and an electromagnetic valve C. The air cylinders comprise a gear shifting air cylinder A, a gear shifting air cylinder B and a clutch air cylinder; the electromagnetic valve A, the electromagnetic valve B and the electromagnetic valve C are electrically connected to a control end of the operating panel, separately, and are in gas circuit connection to a gas storage tank of the excavator, and the electromagnetic valve A and the gear shafting air cylinder A, the electromagnetic valve B and the gear shafting air cylinder B and the electromagnetic valve C and the clutch air cylinder are in one-to-one-correspondence gas circuit connection, separately; a piston shaft of the gear shifting air cylinder A is connected to a gear shifting pull rod A of a transmission, and a piston shaft of the gear shifting air cylinder B is connected to a gear shifting pull rod B of the transmission. The mechanism disclosed by the invention realizes an automatic gear shafting operation of mechanical transmission, has the characteristics of being concise in structure, stable and reliable and simple to operate, and avoids the problems that the transmission mechanism is damaged as a result of malfunction due to operating inexperience, or even safety accidents are generated, are solved.
Description
Technical field
The present invention relates to wheel machine walking excavator field, a kind of the automatic of wheel machine walking excavator is specifically referred to
Gearshift and wheel machine walking excavator.
Background technology
Excavator, is that a kind of scraper bowl excavation is higher or lower than the material for holding machine side, and load haulage vehicle or unload to heap
The earthmoving machinery in stock ground, excavator has become one of topmost engineering machinery in engineering construction.According to the kind of drive not
Together, excavator can be divided into hydraulic moving excavator and machine-walking excavator, and relative to machine driving, hydraulic drive is one new
Technology, hydraulic crawler excavator with wheel machine walking excavator compared with, with component placement it is flexible for installation, realize large-scale stepless
Speed governing, it is easily achieved the advantages of automatically controlling.Yet with hydraulic crawler excavator with liquid as medium, there are associated disadvantages has：Hair
It is hot serious, it is not suitable for walking over long distances；There are mechanical loss, the pressure loss, leakage loss in transmission；It is sensitive to oil temperature, should not be
Element is used under low and high temperature, the accuracy of manufacture is high, and cost is high；Device is difficult diagnosis when breaking down；Etc..So needed at some
Want in the case of flexible occasion, over long distances walking, machine-walking excavator still has the advantage that it is protruded.
Existing wheel machine walking excavator, as shown in Fig. 2 its gearshift is by bowden cable or draw-bar machine
Structure, controls the two gearshift pull bars of A, B in manual transmission respectively；Clutch oil cylinder is controlled by clutch pedal so that gearbox
Upper clutch departs from or combines, so as to realize being acted in driver's cabin remote operation manual shift.People is in driver's cabin by hand of shifting gears
Handle is operated, and mechanical displacement is transmitted to two gearshifts on gearbox by flexible axle.Because flexible axle or drag link mechanism reliability
Property it is relatively low, it is necessary to often safeguard；In addition manual shift mode is complex, and needs the skilled cooperation of foot, operation inconvenience,
During traveling as it is unskilled be easy to misoperation cause gear damage even produce security incident.
In consideration of it, inventor furthers investigate above mentioned problem, and propose to be dug specifically designed for wheel machine walking
Thus automatic gearshift and wheel machine the walking excavator of pick machine, this case produce.
The content of the invention
A purpose of the invention is to provide a kind of wheel machine walking excavator automatic gearshift, by clever structure
Design, realizes mechanically operated self shifter operation, overcomes the defect that existing manual flexible axle or pull bar gearshift are present.
In order to reach above-mentioned purpose, solution of the invention is：
Wheel machine walking excavator automatic gearshift, including control panel, magnetic valve and cylinder, magnetic valve include electricity
Magnet valve A, magnetic valve B and magnetic valve C, cylinder include shifting cylinder A, shifting cylinder B and clutch air cylinder；Magnetic valve A, magnetic valve B
And magnetic valve C is electrically connected the control end of control panel respectively, magnetic valve A, magnetic valve B and magnetic valve C with the storage of excavator
Gas tank gas circuit is connected, and magnetic valve A and shifting cylinder A, magnetic valve B and shifting cylinder B, magnetic valve C and clutch air cylinder are carried out respectively
Correspond gas circuit connection；The gearshift pull bar A of the piston shaft connecting excavator gearbox of shifting cylinder A, the piston of shifting cylinder B
The gearshift pull bar B of axle connecting excavator gearbox.
The clutch air cylinder is connected with bypass gas circuit, and bypass gas circuit bypass is connected to the pneumatic of the brake pedal of excavator
In gas circuit, bypass gas circuit is provided with travel switch.
Pressure switch is equipped with the cylinder outlet of the shifting cylinder A, shifting cylinder B and clutch air cylinder.
The control panel is the control panel for being internally integrated ECU modules, and it has shifted gears from dynamic auxiliary and full-automatic
Two kinds of control models of gearshift.
The control panel have operation mode set and gearshift control button unit, and with display current gear and
Point out the display unit of gearshift.
Another object of the present invention is to provide wheel machine walking excavator, including engine, the speed change being sequentially connected
Case and mechanical driving；Gearbox is connected with automatic gearshift, the automatic gearshift include control panel, magnetic valve and
Cylinder, magnetic valve includes magnetic valve A, magnetic valve B and magnetic valve C, and cylinder includes shifting cylinder A, shifting cylinder B and clutch gas
Cylinder；Magnetic valve A, magnetic valve B and magnetic valve C are electrically connected the control end of control panel, magnetic valve A, magnetic valve B and electromagnetism respectively
Valve C is connected with the air accumulator gas circuit of excavator, magnetic valve A and shifting cylinder A, magnetic valve B and shifting cylinder B, magnetic valve C and
Clutch air cylinder carries out corresponding gas circuit connection respectively；The piston shaft of shifting cylinder A connects the gearshift pull bar A of gearbox, gearshift
The piston shaft of cylinder B connects the gearshift pull bar B of gearbox.
The wheel machine walking excavator also includes brake pedal, and the brake pedal connects with the air accumulator gas circuit of excavator
Connect, bypass gas circuit is connected between the pneumatic gas circuit and clutch air cylinder of the brake pedal, the bypass gas circuit is provided with travel switch.
Pressure switch is equipped with the cylinder outlet of the shifting cylinder A, shifting cylinder B and clutch air cylinder.
The control panel is the control panel for being internally integrated ECU modules, and it has shifted gears from dynamic auxiliary and full-automatic
Two kinds of control models of gearshift.
The control panel have operation mode set and gearshift control button unit, and with display current gear and
Point out the display unit of gearshift.
After using such scheme, a kind of wheel machine walking excavator automatic gearshift of the invention and wheel machine are walked
Excavator, the beneficial effect relative to prior art is：Itself gas of the present invention based on existing wheel machine walking excavator
Source, while brake for gas brake and launch Curve guide impeller, abandon existing machinery gearshift and clutch pedal, only need to increase phase
Control panel, magnetic valve, the cylinder answered, are flexibly connected by corresponding wire harness with pipeline, that is, constitute specialized application of the present invention and exist
Automatic gearshift on wheel machine walking excavator, realizes self shifter.So the present invention not only maintains wheel machine
The walking mechanically operated intrinsic advantage of excavator, also by original cumbersome mechanical changeover operational transformation for the present invention is automatic and succinct
Gear shift operation, very important person is not required in operation carries out shift handle operation and clutch operation, it is only necessary to carry out push-botton operation, tool
Have simple for structure, it is reliable and stable, the features such as easy to operate, it is to avoid the unskilled misoperation of operation causes gear to damage even product
The problems such as raw security incident.
Brief description of the drawings
Fig. 1 is the control principle drawing of wheel machine walking excavator automatic gearshift of the present invention；
Fig. 2 is the structural representation of existing wheel machine walking excavator；
Fig. 3 is the structural representation of gearbox；
Fig. 4 is the gear shifting action schematic diagram of the gearshift pull bar B of gearbox；
Fig. 5 is the gear shifting action schematic diagram of the gearshift pull bar A of gearbox.
Label declaration
The display unit 11 of control panel 1
The magnetic valve B 22 of magnetic valve A 21
The shifting cylinder A 31 of magnetic valve C 23
The clutch air cylinders 33 of shifting cylinder B 32
The bypass air accumulator 4 of gas circuit 331
The pneumatic gas circuit 51 of brake pedal 5
The gearbox 200 of engine 100
The gearshift pull bar B 202 of gearshift pull bar A 201
Mechanical driving 300.
Specific embodiment
This case is described in further detail with reference to the accompanying drawings and detailed description.
This case is related to a kind of wheel machine walking excavator automatic gearshift, as shown in figure 1, including control panel 1, electricity
Magnet valve and cylinder.Wherein, magnetic valve include magnetic valve A21, magnetic valve B22 and magnetic valve C23, cylinder include shifting cylinder A31,
Shifting cylinder B32 and clutch air cylinder 33.
The electric connecting terminal of the magnetic valve A21, magnetic valve B22 and magnetic valve C23 is electrically connected the control of control panel 1 respectively
End processed.The gas circuit connection end of magnetic valve A21, magnetic valve B22 and magnetic valve C23 is connected with the gas circuit of air accumulator 4 of excavator.Electricity
Magnet valve A21 is carried out one by one respectively with shifting cylinder A31, magnetic valve B22 and shifting cylinder B32, magnetic valve C23 and clutch air cylinder 33
Correspondence gas circuit connection.Air accumulator 4, magnetic valve (magnetic valve A21, magnetic valve B22 and magnetic valve C23) and cylinder (shifting cylinder
A31, shifting cylinder B32 and clutch air cylinder 33) (P represents air inlet in Fig. 1, and T represents row to form three groups of separate pneumatic circuits
Gas).
Gearshift the pull bar A201, shifting cylinder B32 of the piston shaft connecting excavator gearbox 200 of the shifting cylinder A31
Piston shaft connect gearbox 200 gearshift pull bar B202.According to the different action requests of cylinder different application occasion, wherein changing
Gear cylinder A31 and shifting cylinder B32 specifically uses two-way cylinder, clutch air cylinder 33 to use one-way cylinder.
In this way, control magnetic valve (magnetic valve A21, magnetic valve B22 and magnetic valve C23) to work by control panel 1, by electricity
Magnet valve (magnetic valve A21, magnetic valve B22 and magnetic valve C23) correspond respectively control shifting cylinder A31, shifting cylinder B32 and
Clutch air cylinder 33 suitably works, final to realize the automatic gear change function with clutch-linkage.Specifically, when self shifter is manipulated,
Manipulator need to only carry out associated button operation on control panel 1, from control panel 1 automatically control each magnetic valve in order with,
Realize that the self shifter of clutch-linkage formula works.The ventilation of clutch air cylinder 33 first is acted, afterwards shifting cylinder A31 and shifting cylinder
Both B32 ventilate and cooperate, and each suitably action realizes that gearshift is dynamic to drive gearshift pull bar A201 and gearshift pull bar B202
Make, treat after the completion of gear shifting action, clutch air cylinder 33 discharges return, so linking up, it is dynamic to complete a complete self shifter manipulation
Make.Gearshift pull bar A201 is identical compared with machine driving gear shifting action with the gear shifting action principle of gearshift pull bar B202, specific ginseng
See Fig. 4-5 and table below, 0 represents in-position in form, and X represents middle position state.
Preferably, the clutch air cylinder 33 is connected with bypass gas circuit 331, and the bypass gas circuit 331 bypass is connected to excavator
Brake pedal 5 pneumatic gas circuit 51 on, bypass gas circuit 331 is provided with travel switch, and the trip switch coordinates brake pedal 5 big
Amplitude brake and control bypass the break-make of gas circuit 331.In work, excavator carries out aerodynamic brake by brake pedal 5, when big
In the presence of amplitude brake, bypass gas circuit 331 is connected and acts clutch air cylinder 33, so as to drive gearbox 200 to depart from start
Machine 100, plays the effect of increase brake.
Preferably, pressure is had additional at the cylinder outlet of the shifting cylinder A31, shifting cylinder B32 and clutch air cylinder 33
Power is switched, and the pressure switch is electrically connected with control panel 1.In this way, when no pressure is produced, fed back by pressure switch,
Indicating alarm effect is played, the effect of failture evacuation is also brought convenience of course simultaneously.
The control panel 1 is preferably the control panel for being internally integrated ECU modules, by ECU modules, can be according to behaviour
Work person's gearshift intent instructions, with reference to engine speed or other monitoring informations judge order and the time of gear shifting action
Beat, prevents gearbox from damaging.ECU modules are preferably electrically connected with speed probe 61 and other sensors 62, by ECU moulds
Block is designed, and automatic gearshift can be realized from dynamic auxiliary gearshift and two kinds of control models of automatically shifting gears.From dynamic auxiliary gearshift mould
Formula, operating personnel are only needed to press corresponding gear button, you can realization is automatically controlled.Full-automatic shift mode, according to speed per hour
And other sensors information, full-automatic gearshift treatment is carried out, operating personnel do not consider gear problem.
The control panel 1 has control button unit, operation mode setting (auxiliary/full-automatic), and gear gear shift operation.
Control panel 1 also has display unit 11, for showing current gear, realizes the function of prompting gearshift.
Another object of the present invention is to provide a kind of novel wheel-type machine-walking excavator, including starting of being sequentially connected
Machine 100, gearbox 200 and mechanical driving 300, the part are connected as common knowledge (shown in Figure 2).The present invention is wheeled
The innovative point of machine-walking excavator is that gearbox 200 is connected with automatic gearshift, the automatic gearshift such as institute above
State, do not remake tired in detail stating here.The brake pedal 5 is the composition structure of wheel machine walking excavator, the brake pedal 5
It is connected with the gas circuit of air accumulator 4 of excavator, realizes aerodynamic brake.Between the pneumatic gas circuit 51 and clutch air cylinder 33 of the brake pedal 5
Bypass gas circuit 331 is connected with, the bypass gas circuit 331 is provided with the travel switch.
The foregoing is only the preferred embodiments of the present invention, all impartial changes done with scope of the invention as claimed and
Modification, all should belong to the scope of the claims in the present invention.
Claims (10)
1. wheel machine walking excavator automatic gearshift, it is characterised in that：Including control panel, magnetic valve and cylinder, electricity
Magnet valve includes magnetic valve A, magnetic valve B and magnetic valve C, and cylinder includes shifting cylinder A, shifting cylinder B and clutch air cylinder；Magnetic valve
A, magnetic valve B and magnetic valve C are electrically connected the control end of control panel respectively, magnetic valve A, magnetic valve B and magnetic valve C with digging
The air accumulator gas circuit connection of pick machine, magnetic valve A and shifting cylinder A, magnetic valve B and shifting cylinder B, magnetic valve C and clutch air cylinder
Carry out corresponding gas circuit connection respectively；The gearshift pull bar A of the piston shaft connecting excavator gearbox of shifting cylinder A, gas of shifting gears
The gearshift pull bar B of the piston shaft connecting excavator gearbox of cylinder B.
2. wheel machine as claimed in claim 1 walking excavator automatic gearshift, it is characterised in that：The clutch air cylinder
Bypass gas circuit is connected with, bypass gas circuit bypass is connected in the pneumatic gas circuit of the brake pedal of excavator, is set in bypass gas circuit
There is travel switch.
3. wheel machine as claimed in claim 1 walking excavator automatic gearshift, it is characterised in that：The shifting cylinder
Pressure switch is equipped with the cylinder outlet of A, shifting cylinder B and clutch air cylinder.
4. wheel machine as claimed in claim 1 walking excavator automatic gearshift, it is characterised in that：The control panel
To be internally integrated the control panel of ECU modules, it has from dynamic auxiliary gearshift and two kinds of control models of automatically shifting gears.
5. wheel machine as claimed in claim 1 walking excavator automatic gearshift, it is characterised in that：The control panel
The control button unit for being set with operation mode and being shifted gears, and the display unit with display current gear and prompting gearshift.
6. wheel machine walking excavator, it is characterised in that：Including the engine, gearbox and the machine driving group that are sequentially connected
Part；Gearbox is connected with automatic gearshift, and the automatic gearshift includes control panel, magnetic valve and cylinder, magnetic valve bag
Magnetic valve A, magnetic valve B and magnetic valve C are included, cylinder includes shifting cylinder A, shifting cylinder B and clutch air cylinder；Magnetic valve A, electromagnetism
Valve B and magnetic valve C are electrically connected the control end of control panel respectively, magnetic valve A, magnetic valve B and magnetic valve C with excavator
Air accumulator gas circuit is connected, and magnetic valve A and shifting cylinder A, magnetic valve B and shifting cylinder B, magnetic valve C and clutch air cylinder enter respectively
Row corresponds gas circuit connection；The piston shaft of gearshift the pull bar A, shifting cylinder B of the piston shaft connection gearbox of shifting cylinder A connects
Meet the gearshift pull bar B of gearbox.
7. wheel machine as claimed in claim 6 walking excavator, it is characterised in that：The wheel machine walking excavator is also
Including brake pedal, the brake pedal is connected with the air accumulator gas circuit of excavator, pneumatic gas circuit and the clutch gas of the brake pedal
Bypass gas circuit is connected between cylinder, the bypass gas circuit is provided with travel switch.
8. wheel machine as claimed in claim 6 walking excavator, it is characterised in that：The shifting cylinder A, shifting cylinder B
And it is equipped with pressure switch at the cylinder outlet of clutch air cylinder.
9. wheel machine as claimed in claim 6 walking excavator, it is characterised in that：The control panel is to be internally integrated
The control panel of ECU modules, it has from dynamic auxiliary gearshift and two kinds of control models of automatically shifting gears.
10. wheel machine as claimed in claim 6 walking excavator, it is characterised in that：The control panel has operation mode
Setting and the control button unit of gearshift, and the display unit with display current gear and prompting gearshift.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710006795.0A CN106704583B (en) | 2017-01-05 | 2017-01-05 | Wheel machine walking excavator automatic gearshift |
| CN201810618078.8A CN108799486A (en) | 2017-01-05 | 2017-01-05 | A kind of wheel machine walking excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710006795.0A CN106704583B (en) | 2017-01-05 | 2017-01-05 | Wheel machine walking excavator automatic gearshift |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810618078.8A Division CN108799486A (en) | 2017-01-05 | 2017-01-05 | A kind of wheel machine walking excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106704583A true CN106704583A (en) | 2017-05-24 |
| CN106704583B CN106704583B (en) | 2018-10-12 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710006795.0A Active CN106704583B (en) | 2017-01-05 | 2017-01-05 | Wheel machine walking excavator automatic gearshift |
| CN201810618078.8A Pending CN108799486A (en) | 2017-01-05 | 2017-01-05 | A kind of wheel machine walking excavator |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810618078.8A Pending CN108799486A (en) | 2017-01-05 | 2017-01-05 | A kind of wheel machine walking excavator |
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| Country | Link |
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| CN (2) | CN106704583B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622283A (en) * | 2020-06-17 | 2020-09-04 | 雷沃工程机械集团有限公司 | Excavator action state monitoring device, excavator and control method |
| CN112178181B (en) * | 2020-11-03 | 2022-04-19 | 陕西法士特齿轮有限责任公司 | Gas circuit structure for actuating mechanism of AMT (automated mechanical transmission) |
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| CN206368963U (en) * | 2017-01-05 | 2017-08-01 | 福建晋工机械有限公司 | Wheel machine walking excavator automatic gearshift and wheel machine walking excavator |
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| CN101474990A (en) * | 2009-01-15 | 2009-07-08 | 鲁东大学 | Large-sized vehicle intelligent synthetic brake control system |
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| CN105034800B (en) * | 2015-03-30 | 2017-10-31 | 徐工集团工程机械股份有限公司道路机械分公司 | A kind of clutch of road roller and brakes |
| CN105782424B (en) * | 2016-05-23 | 2017-12-29 | 武汉理工大学 | Tractor speed changer ecp gearshift |
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- 2017-01-05 CN CN201710006795.0A patent/CN106704583B/en active Active
- 2017-01-05 CN CN201810618078.8A patent/CN108799486A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000272532A (en) * | 1999-03-23 | 2000-10-03 | Shin Caterpillar Mitsubishi Ltd | Running operating device for crawler type running machine body |
| JP2005297815A (en) * | 2004-04-13 | 2005-10-27 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic control device for construction machine |
| CN202629043U (en) * | 2011-12-16 | 2012-12-26 | 北汽福田汽车股份有限公司 | Gearshift speed-change operating device |
| CN103434394A (en) * | 2013-08-29 | 2013-12-11 | 华南理工大学 | FSAE racing car gear shifting system |
| CN104295734A (en) * | 2014-10-30 | 2015-01-21 | 山东冠县鲁牛工程机械有限公司 | Wheel excavator with automatic speed changing device |
| CN205009996U (en) * | 2015-08-31 | 2016-02-03 | 山东沃尔华工程机械有限公司 | Excavator flexible axle gearshift |
| CN105387196A (en) * | 2015-12-24 | 2016-03-09 | 诸城福田汽车科技开发有限公司 | Semi-automatic variable speed control system and automobile |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106704583B (en) | 2018-10-12 |
| CN108799486A (en) | 2018-11-13 |
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