CN106704583B - Wheel machine walking excavator automatic gearshift - Google Patents
Wheel machine walking excavator automatic gearshift Download PDFInfo
- Publication number
- CN106704583B CN106704583B CN201710006795.0A CN201710006795A CN106704583B CN 106704583 B CN106704583 B CN 106704583B CN 201710006795 A CN201710006795 A CN 201710006795A CN 106704583 B CN106704583 B CN 106704583B
- Authority
- CN
- China
- Prior art keywords
- solenoid valve
- cylinder
- shifting
- excavator
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The present invention discloses a kind of wheel machine walking excavator automatic gearshift, including control panel, solenoid valve and cylinder, solenoid valve include solenoid valve A, solenoid valve B and solenoid valve C, and cylinder includes shifting cylinder A, shifting cylinder B and clutch air cylinder；Solenoid valve A, solenoid valve B and solenoid valve C are electrically connected the control terminal of control panel respectively, solenoid valve A, solenoid valve B and solenoid valve C are connect with the air accumulator gas circuit of excavator, and solenoid valve A carries out one-to-one correspondence gas circuit with shifting cylinder B, solenoid valve C with clutch air cylinder with shifting cylinder A, solenoid valve B and connect respectively；The shift pull rod B of the piston axis connection gearbox of shift the pull rod A, shifting cylinder B of the piston axis connection gearbox of shifting cylinder A.The present invention realizes mechanically operated self shifter operation, has feature simple for structure, reliable and stable, easy to operate, and avoiding operating unskilled malfunction leads to problems such as gear damage even generate safety accident.
Description
Technical field
The present invention relates to wheel machine walking excavator field, in particular to a kind of wheel machine walk excavator it is automatic
Gearshift.
Background technology
Excavator is that a kind of excavated with scraper bowl is higher or lower than the material for holding machine side, and is packed into haulage vehicle or unloads to heap
The earthmoving machinery in stock ground, excavator have become one of most important engineering machinery in engineering construction.Not according to the kind of drive
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 walk excavator compared with, have component placement it is flexible for installation, realize large-scale stepless
Speed governing is easily achieved the advantages that automatically controlling.However since hydraulic crawler excavator is using liquid as medium, there are associated disadvantages to have：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, it should not be
Element is used under low and high temperature, the accuracy of manufacture is high, and cost is high；Device is not easy to diagnose when breaking down；Etc..So in some need
In the case of wanting flexible occasion, over long distances walking, machine-walking excavator still has its advantage outstanding.
Existing wheel machine walking excavator, as shown in Fig. 2, its gearshift is to pass through bowden cable or draw-bar machine
Structure controls two shift pull rods of A, B in manual transmission respectively；Clutch oil cylinder is controlled by clutch pedal so that gearbox
Upper clutch is detached from or combines, and is acted in driver's cabin remote operation manual shift to realize.People passes through hand of shifting gears in driver's cabin
Handle operates, and mechanical displacement is transmitted to two gearshifts on gearbox by flexible axle.Because flexible axle or drag link mechanism are reliable
Property is relatively low, needs often to safeguard；In addition manual shift mode is complex, and needs the skilled cooperation of foot, inconvenient,
In driving process as it is unskilled be easy to malfunction cause gear damage even generate safety accident.
In consideration of it, inventor furthers investigate the above problem, and proposes to walk specifically for wheel machine and dig
Thus automatic gearshift and wheel machine the walking excavator of pick machine, this case generate.
Invention content
The one of the present invention is designed to provide a kind of wheel machine walking excavator automatic gearshift, passes through clever structure
Mechanically operated self shifter operation is realized in design, overcomes existing manual flexible axle or the existing defect of pull rod shift.
In order to achieve the above objectives, solution of the invention is：
Wheel machine walking excavator automatic gearshift, including control panel, solenoid valve and cylinder, solenoid valve include electricity
Magnet valve A, solenoid valve B and solenoid valve C, cylinder include shifting cylinder A, shifting cylinder B and clutch air cylinder；Solenoid valve A, solenoid valve B
And solenoid valve C is electrically connected the control terminal of control panel respectively, solenoid valve A, solenoid valve B and solenoid valve C with the storage of excavator
Gas tank gas circuit connects, and solenoid valve A and shifting cylinder A, solenoid valve B and shifting cylinder B, solenoid valve C and clutch air cylinder carry out respectively
Correspond gas circuit connection；The shift pull rod A of the piston shaft connecting excavator gearbox of shifting cylinder A, the piston of shifting cylinder B
The shift pull rod B of axis connection 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 equipped with travel switch.
It is equipped with pressure switch at 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, with from dynamic auxiliary shift and automatically
Two kinds of control models of shift.
The control panel have operation mode set and shift gears control button unit, and with display current gear and
Prompt the display unit of shift.
Another object of the present invention is to provide wheel machine walking excavators, including sequentially connected engine, speed change
Case and mechanical driving；Gearbox is connected with automatic gearshift, the automatic gearshift include control panel, solenoid valve and
Cylinder, solenoid valve include solenoid valve A, solenoid valve B and solenoid valve C, and cylinder includes shifting cylinder A, shifting cylinder B and clutch gas
Cylinder；Solenoid valve A, solenoid valve B and solenoid valve C are electrically connected the control terminal of control panel, solenoid valve A, solenoid valve B and electromagnetism respectively
Valve C is connect with the air accumulator gas circuit of excavator, solenoid valve A and shifting cylinder A, solenoid valve B and shifting cylinder B, solenoid valve C and
Clutch air cylinder carries out corresponding gas circuit connection respectively；The shift pull rod A of the piston axis connection gearbox of shifting cylinder A, shift
The shift pull rod B of the piston axis connection gearbox of cylinder B.
The wheel machine walking excavator further includes brake pedal, and the air accumulator gas circuit of the brake pedal and excavator connects
It connects, bypass gas circuit is connected between the pneumatic gas circuit and clutch air cylinder of the brake pedal, which is equipped with travel switch.
It is equipped with pressure switch at 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, with from dynamic auxiliary shift and automatically
Two kinds of control models of shift.
The control panel have operation mode set and shift gears control button unit, and with display current gear and
Prompt the display unit of shift.
After adopting the above scheme, a kind of wheel machine walking excavator automatic gearshift of the present invention and wheel machine walking
Excavator, advantageous effect compared with the existing technology are：The present invention is based on itself gas of existing wheel machine walking excavator
Source while brake are braked for gas is unfolded Curve guide impeller, abandons existing machinery gearshift and clutch pedal, only need to increase phase
Control panel, solenoid valve, the cylinder answered flexibly are connect by corresponding harness with pipeline, that is, are constituted specialized application of the present invention and existed
The automatic gearshift that wheel machine is walked on excavator realizes self shifter.So the present invention not only maintains wheel machine
It walks the mechanically operated intrinsic advantage of excavator, is also that the present invention is automatic and succinct by original cumbersome mechanical changeover operational transformation
Gear shift operation, very important person is not required in operation and carries out shift handle operation and clutch operation, it is only necessary to carry out push-botton operation, have
Have it is simple for structure, it is reliable and stable, it is easy to operate the features such as, avoiding operating unskilled malfunction causes gear damage even to be produced
The problems such as raw safety accident.
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 schematic diagram of existing wheel machine walking excavator；
Fig. 3 is the structural schematic diagram of gearbox；
Fig. 4 is the gear shifting action schematic diagram of the shift pull rod B of gearbox；
Fig. 5 is the gear shifting action schematic diagram of the shift pull rod A of gearbox.
Label declaration
1 display unit 11 of control panel
21 solenoid valve B 22 of solenoid valve A
23 shifting cylinder A 31 of solenoid valve C
32 clutch air cylinders 33 of shifting cylinder B
Bypass 331 air accumulator 4 of gas circuit
5 pneumatic gas circuit 51 of brake pedal
100 gearbox 200 of engine
Shift gears 201 shift pull rod B 202 of pull rod A
Mechanical driving 300.
Specific implementation mode
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, solenoid valve includes solenoid valve A21, solenoid valve B22 and solenoid valve C23, cylinder include shifting cylinder A31,
Shifting cylinder B32 and clutch air cylinder 33.
The electric connecting terminal of the solenoid valve A21, solenoid valve B22 and solenoid valve C23 are electrically connected the control of control panel 1 respectively
End processed.The gas circuit connecting pin of solenoid valve A21, solenoid valve B22 and solenoid valve C23 are connect with 4 gas circuit of the air accumulator of excavator.Electricity
Magnet valve A21 is carried out one by one respectively with shifting cylinder A31, solenoid valve B22 and shifting cylinder B32, solenoid valve C23 and clutch air cylinder 33
Corresponding gas circuit connection.Air accumulator 4, solenoid valve (solenoid valve A21, solenoid valve B22 and solenoid valve C23) and cylinder (shifting cylinder
A31, shifting cylinder B32 and clutch air cylinder 33) forming three groups of mutually independent pneumatic circuits, (P represents air inlet in Fig. 1, and T represents row
Gas).
Shift the pull rod A201, shifting cylinder B32 of the piston shaft connecting excavator gearbox 200 of the shifting cylinder A31
Piston axis connection gearbox 200 shift pull rod B202.According to the different action requests of cylinder different application occasion, wherein changing
Keeping off cylinder A31 and shifting cylinder B32 specifically uses two-way cylinder, clutch air cylinder 33 to use one-way cylinder.
It works in this way, controlling solenoid valve (solenoid valve A21, solenoid valve B22 and solenoid valve C23) by control panel 1, by electricity
Magnet valve (solenoid valve A21, solenoid valve B22 and solenoid 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 manipulates,
Manipulator need to only carry out associated button operation on control panel 1, from control panel 1 automatically control each solenoid valve orderly with,
Realize clutch-linkage formula self shifter work.33 ventilation of clutch air cylinder acts first, later shifting cylinder A31 and shifting cylinder
Both B32 ventilate and cooperate, and driving shift pull rod A201 and shift pull rod B202, respectively suitably action realizes that shift is dynamic
Make, after the completion of waiting for gear shifting action, clutch air cylinder 33 discharges return, and so linking up, it is dynamic to complete a complete self shifter manipulation
Make.The gear shifting action principle of shift pull rod A201 and the pull rod B202 that shifts gears are identical compared with machine driving gear shifting action, specific to join
See Fig. 4-5 and following table, 0 indicates position state during in-position, X indicate in table.
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 equipped with travel switch, and the trip switch cooperation brake pedal 5 is big
Amplitude brake and control bypass 331 break-make of gas circuit.In work, excavator carries out aerodynamic brake by brake pedal 5, when big
In the presence of amplitude brake, the bypass connection of gas circuit 331 makes clutch air cylinder 33 act, to drive the disengaging of gearbox 200 to start
Machine 100 plays the effect for increasing brake.
Preferably, pressure is had additional at the cylinder outlet of the shifting cylinder A31, shifting cylinder B32 and clutch air cylinder 33
Power switchs, which is electrically connected with control panel 1.In this way, when there is no pressure generation, fed back by pressure switch,
Play the role of indicating alarm, also brings convenience troubleshooting of course simultaneously.
The control panel that the control panel 1 is preferably internally integrated ECU modules can be according to behaviour by ECU modules
Work person's shifting intention instructs, and sequence and the time of judgement gear shifting action are carried out in conjunction with engine speed or other monitoring informations
Beat prevents gearbox from damaging.ECU modules are preferably electrically connected with speed probe 61 and other sensors 62, pass through ECU moulds
Block designs, and automatic gearshift can be realized from dynamic auxiliary shift and two kinds of control models of automatically shifting gears.From dynamic auxiliary shift mould
Formula, operating personnel only need to press corresponding gear button, you can realization automatically controls.Full-automatic shift mode, according to speed per hour
And other sensors information, full-automatic shift processing 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 prompt shift.
Another object of the present invention is to provide a kind of novel wheel-type machine-walking excavator, including sequentially connected start
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
It states, does not remake tired in detail state here.The brake pedal 5 is the composed structure of wheel machine walking excavator, the brake pedal 5
It is connect with 4 gas circuit of air accumulator of excavator, realizes aerodynamic brake.Between the pneumatic gas circuit 51 and clutch air cylinder 33 of the brake pedal 5
It is connected with bypass gas circuit 331, which is equipped with the travel switch.
The foregoing is merely the preferred embodiment of the present invention, all equivalent changes done with scope of the invention as claimed and
Modification, should all belong to the range of the claims in the present invention.
Claims (4)
- The excavator automatic gearshift 1. wheel machine is walked, it is characterised in that：Including control panel, solenoid valve and cylinder, electricity Magnet valve includes solenoid valve A, solenoid valve B and solenoid valve C, and cylinder includes shifting cylinder A, shifting cylinder B and clutch air cylinder；Solenoid valve A, solenoid valve B and solenoid valve C is electrically connected the control terminal of control panel respectively, solenoid valve A, solenoid valve B and solenoid valve C with digging The air accumulator gas circuit of pick machine connects, solenoid valve A and shifting cylinder A, solenoid valve B and shifting cylinder B, solenoid valve C and clutch air cylinder It carries out corresponding gas circuit connection respectively；The shift pull rod A of the piston shaft connecting excavator gearbox of shifting cylinder A, gas of shifting gears The shift pull rod B of the piston shaft connecting excavator gearbox of cylinder B；The clutch air cylinder is connected with bypass gas circuit, the bypass gas circuit In the pneumatic gas circuit for bypassing the brake pedal for being connected to excavator, bypass gas circuit is equipped with travel switch.
- The excavator automatic gearshift 2. wheel machine as described in claim 1 is walked, it is characterised in that：The shifting cylinder A, it is equipped with pressure switch at the cylinder outlet of shifting cylinder B and clutch air cylinder.
- The excavator automatic gearshift 3. wheel machine as described in claim 1 is walked, it is characterised in that：The control panel To be internally integrated the control panel of ECU modules, have from dynamic auxiliary shift and two kinds of control models of automatically shifting gears.
- The excavator automatic gearshift 4. wheel machine as described in claim 1 is walked, it is characterised in that：The control panel The control button unit for setting and shifting gears with operation mode, and the display unit with display current gear and prompt shift.
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 CN106704583A (en) | 2017-05-24 |
| CN106704583B true CN106704583B (en) | 2018-10-12 |
Family
ID=58907877
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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106704583B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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) |
Family Cites Families (13)
| 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 |
| JP4168004B2 (en) * | 2004-04-13 | 2008-10-22 | 住友建機製造株式会社 | Hydraulic control equipment for construction machinery |
| CN101474990A (en) * | 2009-01-15 | 2009-07-08 | 鲁东大学 | Large-sized vehicle intelligent synthetic brake control system |
| CN201433413Y (en) * | 2009-04-29 | 2010-03-31 | 曾华文 | Wheel excavator |
| 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 |
| CN203096805U (en) * | 2013-03-16 | 2013-07-31 | 常德市鼎城区升湘机械有限责任公司 | Electric-pneumatic-hydraulic combined control system of wheel excavator |
| CN103434394B (en) * | 2013-08-29 | 2016-03-02 | 华南理工大学 | A kind of FSAE racing car shifting system |
| CN104295734B (en) * | 2014-10-30 | 2016-08-17 | 山东冠县鲁牛工程机械有限公司 | A kind of wheel excavator with automatic transimission |
| 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 |
| 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 |
| CN105387196B (en) * | 2015-12-24 | 2017-12-08 | 诸城福田汽车科技开发有限公司 | A kind of semi-automatic transmission steerable system and automobile |
| CN105782424B (en) * | 2016-05-23 | 2017-12-29 | 武汉理工大学 | Tractor speed changer ecp gearshift |
| 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 |
-
2017
- 2017-01-05 CN CN201710006795.0A patent/CN106704583B/en active Active
- 2017-01-05 CN CN201810618078.8A patent/CN108799486A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN106704583A (en) | 2017-05-24 |
| CN108799486A (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102149948B (en) | Control of selectable one-way clutch in transmission | |
| CN106184210B (en) | Working truck | |
| CN104619974B (en) | The idle stop control device of the vehicle of auto-manual gearbox is installed | |
| CN101560925B (en) | Engine controller for work vehicle | |
| CN104802790A (en) | New-energy entire car controller integrated with transmission case control function | |
| CN102128093A (en) | Engine control device for tractor | |
| JP2000055791A (en) | Method and apparatus for measuring equipment performance data on construction machine | |
| CN102252090A (en) | Locking and unlocking device of crawler-type engineering machinery hydraulic torque converter and control method thereof | |
| CN206368963U (en) | Wheel machine walking excavator automatic gearshift and wheel machine walking excavator | |
| CN106704583B (en) | Wheel machine walking excavator automatic gearshift | |
| GB2268554A (en) | Gearing control system has forward/reverse main clutch and quick operative clutch. | |
| CN103423436B (en) | The electric gear change system of vehicle mechanical gearbox | |
| CN203832474U (en) | Steering and braking hydraulic system | |
| CN202627061U (en) | Hydraulic driving wheel type excavator gear-shifting device | |
| CN203641474U (en) | Electric-control gearshift of roller tractor | |
| CN104295734B (en) | A kind of wheel excavator with automatic transimission | |
| CN206201980U (en) | A kind of semi-automatic arrangement of clutch | |
| US3667629A (en) | Control and power apparatus for operating trash collection vehicle packers | |
| CN103836181A (en) | Loader static pressure transmission control system | |
| CN101768991A (en) | Turning operation system, turning operation method and working machine with the turning operation system | |
| JP2008144628A (en) | Working vehicle | |
| CN202643235U (en) | Telescopic-arm forklift loader | |
| CN112161045B (en) | Tractor power shift electrical control system | |
| CN210461657U (en) | Tractor load reversing and high-low gear gearbox control device | |
| CN201604707U (en) | Novel crawler-type tractor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |