CN207064625U - Tractor hydraulic gearshift - Google Patents
Tractor hydraulic gearshift Download PDFInfo
- Publication number
- CN207064625U CN207064625U CN201720705856.8U CN201720705856U CN207064625U CN 207064625 U CN207064625 U CN 207064625U CN 201720705856 U CN201720705856 U CN 201720705856U CN 207064625 U CN207064625 U CN 207064625U
- Authority
- CN
- China
- Prior art keywords
- gearshift
- shifting fork
- fork bar
- clutch
- position sensor
- 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
Landscapes
- Control Of Transmission Device (AREA)
Abstract
Tractor manufacturing technology field is the utility model is related to, specifically a kind of tractor hydraulic gearshift.Including shift handle, shifting fork bar and clutch, the handle position sensor for being connected to gearshift controller is installed on shift handle；The clutch position sensor for being connected to gearshift controller is installed on clutch；The control terminal of the signal output part connection gearshift magnetic valve of gearshift controller is used for the action for controlling gearshift magnetic valve；Shifting fork bar is connected with hydraulic cylinder, and gearshift magnetic valve is connected in the oil circuit of hydraulic cylinder.The gearshift is acted using hydraulic jack instead of Manual-pushing shifting fork bar, and gear shift operation is light, action is accurate；Gearshift controller writes corresponding gearshift program, and sequence gearshift and self shifter can be achieved.
Description
Technical field
Tractor manufacturing technology field is the utility model is related to, specifically a kind of tractor hydraulic gearshift.
Background technology
At present, the gearshift of tractor directly controls shift fork to realize the manual shift machine that gear engages using gear level
Structure.For large-scale, heavy load tractor, the resistance of gearbox gear slipping is larger, and hand shift is very painstaking；In addition, become
The cooperation of clutch is needed when fast case gearshift, only just allows selector fork to promote in the state of clutch is kept completely separate
Gear shift gears, but existing manual gear shift mechanism do not have corresponding locking device, clutch failure or operational error from
Gearshift easily breaks gear in the case of clutch is unsegregated, causes gearbox to damage.Existing tractor mainly uses conventional tooth
Wheel, synchronizer or engaging sleeve mechanical commutation, using flower arrangement formula gearshift, to match the optimum Working of tractor, it is necessary to more
Gear number, therefore the fast and multiple secondary speed change of at least one main transformer of gearbox.It is real that this just needs multiple operation handle combinations
Now shift gears, driver needs frequently to operate each shift handle, and labor intensity is big, operational error easily occurs.
The content of the invention
In order to solve the above technical problems, the purpose of this utility model be to provide a kind of gear shift operation it is light, with clutch
Locking functions, the tractor hydraulic gearshift completed a variety of gears and combined is operated by a handle, it is unsegregated in clutch
In the case of gear shift operation failure, avoid the occurrence of on-load gearshift and beat the phenomenon of gear.
The utility model is that technical scheme is as follows used by solving technical problem：
Tractor hydraulic gearshift described in the utility model includes shift handle, shifting fork bar and clutch, the gearshift
Handle position sensor is installed, the signal output part of the handle position sensor is connected to changing for gearshift controller on handle
Keep off signal input part；Clutch position sensor, the signal output part of clutch position sensor are installed on the clutch
It is connected to the clutch signal input part of gearshift controller；The control of the signal output part connection gearshift magnetic valve of the gearshift controller
End processed is used for the action for controlling gearshift magnetic valve；The shifting fork bar is connected with hydraulic cylinder, and gearshift magnetic valve is connected on hydraulic pressure
In the oil circuit of cylinder；The gear position sensor for detecting its position, the signal of the gear position sensor are provided with the shifting fork bar
Output end is connected to gearshift controller gear signal input；Buffer is provided between the shifting fork bar and hydraulic cylinder, it is described
Buffer includes being fixedly connected on the spring base on shifting fork bar, the spring in spring base, the piston rod of the hydraulic cylinder
It is slidably mounted in spring base.
It is be arranged in parallel by two shifting fork bars and forms one group, every shifting fork bar is respectively to applied to the hydraulic pressure for promoting its motion
Cylinder, the mutual interlocking gear for locking other side's shifting fork bar is provided between two shifting fork bars.
The mutual interlocking gear includes being arranged on the annular groove on shifting fork bar, the backset steel ball in annular groove, the backset
Steel ball is arranged between two annular grooves of one group of shifting fork bar, and the length of backset steel ball is more than the width in gap between two shifting fork bars
Spend, less than the gap between two annular groove bottom lands.
As a result of said structure, the hydraulic gear-shifting device is acted using hydraulic jack instead of Manual-pushing shifting fork bar,
Gear shift operation is light, action is accurate；Simultaneously using the location status of sensor detection clutch, in the unsegregated state of clutch
Under, controller is not responding to the action of shift handle, can avoid the occurrence of the phenomenon that gear is played in on-load gearshift.Its structure uses journey
Sequence control hydraulic pressure, mechanical actuating mechanism complete gearshift, therefore can realize sequence gearshift or hopping sequence gearshift, and all gears are by one
Individual operation handle is completed, and can also realize self shifter.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model one embodiment.
Fig. 2 is the structural representation of the hydraulic jack and gearshift magnetic valve in holding state.
Fig. 3 is the structural representation of the hydraulic jack and gearshift magnetic valve in gearshift condition.
Fig. 4 is the structural representation of hydraulic jack and buffer.
Fig. 5 is the schematic diagram of movements for hanging shelves state shifting fork bar.
Embodiment
As shown in figure 1, tractor hydraulic gearshift described in the utility model include shift handle 5, shifting fork bar 11 and from
Clutch.Handle position sensor is installed on the shift handle 5, the position being in for detecting shift handle 5 in different stalls
Confidence ceases, and the handle position sensor can use microswitch, can also use the sensor of the other forms such as travel switch.
The signal output part of the handle position sensor is connected to the gear shifting signal input of gearshift controller 7, by shift handle 5
Location status information transfer is into gearshift controller 7.
Clutch position sensor 8 is installed, for detecting whether clutch is in released state on the clutch.From
The signal output part of clutch position sensor 8 is connected to the clutch signal input part of gearshift controller 7, clutch position sensor
Microswitch or travel switch can be used, judges whether clutch separates by the switching of switch.The gearshift controller
The control terminal of 7 signal output part connection gearshift magnetic valve 2 is used for the action for controlling gearshift magnetic valve 2；The shifting fork bar 11 with
Hydraulic cylinder 1 is connected, and gearshift magnetic valve 2 is connected in the oil circuit of hydraulic cylinder 1.There is return spring inside shift cylinder 1, make to change
Piston in gear oil cylinder 1 is maintained at centre position when being acted on without external force.
In addition, the gear position sensor 9,10 for detecting its position is provided with the shifting fork bar 11, the gear sensing
The signal output part of device 9,10 is connected to the gear signal input of gearshift controller 7.
As shown in Figure 2 and Figure 3, handle position sensor is triggered when shift handle 5 acts to send out to gearshift controller 7
Shifting commands are sent, gearshift controller 7 reads the positional information of clutch sensor 8, and when clutch sensor 8 has signal, explanation is dragged
Machine drawing clutch has been completely separated, and can perform gear shifting action, and the signal output part of gearshift controller 7 is to gearshift magnetic valve 2
Action command is sent, control magnetic valve 2 acts, and hydraulic cylinder 1 promotes shifting fork bar 11 to move, and completes action of putting into gear.When shifting fork bar 11
After moving into place, gear position sensor 9,10 cans, which monitor to put into gear, completes signal, and the signal is fed back into gearshift controller 7,
Gearshift controller 7 sends halt instruction to control magnetic valve 2, and control magnetic valve 2 returns to the middle position state of holding state, hydraulic cylinder
1 oil circuit both ends turn on tractor hydraulic system fuel tank 3, and oil circuit pressure at two ends is zero, and oil cylinder piston is under the action of the spring
It is maintained at centre position.
Conversely, when clutch sensor 8 detects clutch to separate, gearshift controller 7 is not responding to shift handle 5
Action, no matter how shift handle 5 moves, and gearshift controller 7 not to the control output control of magnetic valve 2 instruction, protect by shifting fork bar 11
Hold in situ motionless.
In addition, being provided with buffer 12 between the shifting fork bar 11 and hydraulic cylinder 1, it can mitigate what is be subject to during slide bar movement
Impact.The buffer 12 includes being fixedly connected on the spring base on shifting fork bar 11, the spring 121 in spring base, institute
The piston rod for stating hydraulic cylinder 1 is slidably mounted in spring base and is fixedly connected with one end of spring 121.
As shown in figure 5, in gearbox, being be arranged in parallel by two shifting fork bars 11 forms one group, more gears combinations when
Wait, can set multigroup, each group forms by two shifting fork bars.Every shifting fork bar 11 respectively to applied to promote its motion
Hydraulic cylinder 1, the mutual interlocking gear for locking other side's shifting fork bar is provided between two shifting fork bars 11.The mutual interlocking gear includes setting
The annular groove 21 on shifting fork bar 11, the backset steel ball 20 in annular groove 21 are put, the backset steel ball 20 is arranged on one group and dialled
Between two annular grooves of fork arm, the length of backset steel ball 20 is more than the width in gap between two shifting fork bars, less than two annular groove grooves
Gap between bottom.The length of backset steel ball 20 is preferably equal to the width in gap and the depth of an annular groove between two shifting fork bars
Sum.So, when two annular grooves in one group of shifting fork bar are located relatively at same plane, backset steel ball 20 is stuck in two annular grooves
Between, and any one shifting fork bar can move, but as long as after a wherein shifting fork bar movement another shifting fork bar then by
Locking, it can just be unlocked until the shifting fork bar being subjected to displacement returns to original position.
When A to be hung is kept off, solenoid valve control hydraulic cylinder right-hand member connection hydraulic oil, hydraulic cylinder piston is pushed away to the left, piston is left
End is arranged on buffer 12, and the spring 121 in buffer 12 is compressed by pistons, and then promotes shifting fork bar to be moved to the left, shift fork
Bar may finally control the engagement of A gear gears.Due to adding buffer 12, the flexible engagement of power shift gear can be caused, improved
Smooth gear shifting.When hanging B gears, direction of action is on the contrary, principle is same as above.
Claims (3)
1. tractor hydraulic gearshift, including shift handle（5）, shifting fork bar（11）And clutch, it is characterised in that：It is described to change
Block handle（5）On handle position sensor is installed, the signal output part of the handle position sensor is connected to gearshift control
Device（7）Gear shifting signal input；Clutch position sensor is installed on the clutch（8）, clutch position sensor
（8）Signal output part be connected to gearshift controller（7）Clutch signal input part；The gearshift controller（7）Signal it is defeated
Go out end connection gearshift magnetic valve（2）Control terminal be used for control gearshift magnetic valve（2）Action；The shifting fork bar（11）With hydraulic pressure
Cylinder（1）Drive connection, gearshift magnetic valve（2）It is connected on hydraulic cylinder（1）Oil circuit in；The shifting fork bar（11）On be provided with and be used for
Detect the gear position sensor of its position（9、10）, the gear position sensor（9、10）Signal output part be connected to gearshift controller
（7）Gear signal input；The shifting fork bar（11）With hydraulic cylinder（1）Between be provided with buffer（12）, the buffer
（12）Including being fixedly connected on shifting fork bar（11）On spring base, the spring in spring base（121）, the hydraulic cylinder
（1）Piston rod be slidably mounted in spring base.
2. tractor hydraulic gearshift according to claim 1, it is characterised in that：By two shifting fork bars（11）It is parallel to set
Put one group of composition, every shifting fork bar（11）Respectively to applied to the hydraulic cylinder for promoting its motion（1）, two shifting fork bars（11）Between
It is provided with the mutual interlocking gear for locking other side's shifting fork bar.
3. tractor hydraulic gearshift according to claim 2, it is characterised in that：The mutual interlocking gear includes being arranged on
Shifting fork bar（11）On annular groove（21）, installed in annular groove（21）In backset steel ball（20）, the backset steel ball（20）It is arranged on
Between two annular grooves of one group of shifting fork bar, backset steel ball（20）Length be more than the width in gap between two shifting fork bars, be less than
Gap between two annular groove bottom lands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720705856.8U CN207064625U (en) | 2017-06-17 | 2017-06-17 | Tractor hydraulic gearshift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720705856.8U CN207064625U (en) | 2017-06-17 | 2017-06-17 | Tractor hydraulic gearshift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207064625U true CN207064625U (en) | 2018-03-02 |
Family
ID=61509741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720705856.8U Active CN207064625U (en) | 2017-06-17 | 2017-06-17 | Tractor hydraulic gearshift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207064625U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023666A (en) * | 2017-06-17 | 2017-08-08 | 山东潍坊鲁中拖拉机有限公司 | Tractor hydraulic gearshift |
| CN110985664A (en) * | 2019-12-16 | 2020-04-10 | 西安法士特汽车传动有限公司 | Hydraulic gear shifting structure, gear shifting method and transmission |
-
2017
- 2017-06-17 CN CN201720705856.8U patent/CN207064625U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023666A (en) * | 2017-06-17 | 2017-08-08 | 山东潍坊鲁中拖拉机有限公司 | Tractor hydraulic gearshift |
| CN110985664A (en) * | 2019-12-16 | 2020-04-10 | 西安法士特汽车传动有限公司 | Hydraulic gear shifting structure, gear shifting method and transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107023666A (en) | Tractor hydraulic gearshift | |
| EP1965101B1 (en) | Electro-hydraulic control system for a motor-vehicle transmission | |
| CN103827554B (en) | Variator overdrive lever position sensor for gear section trigger | |
| CN207064625U (en) | Tractor hydraulic gearshift | |
| CN101245850A (en) | Mechanical automatic speed-changing direct-shifting hydraulic actuator of heavy vehicle | |
| CN102606722A (en) | Automatic speed changing method based on manual gearbox and system | |
| CN107246473A (en) | A kind of synchronizer gearshift fault self-adapting control method | |
| CN103671888A (en) | Electric control gear shifting device of roller tractor | |
| CN202144861U (en) | General actuating mechanism of mechanical automatic speed changer | |
| CN203717895U (en) | AMT (automated mechanical transmission) selector gear-shifting position detection device | |
| CN202280826U (en) | Hydraulically-controlled speed change mechanism | |
| CN103697156B (en) | Pneumatic shifting multipoint soft positioning mechanism | |
| CN102261461A (en) | Gear selection actuating mechanism of electronic controlled mechanical-type automatic transmission | |
| CN202301904U (en) | Automatic gear position selection and shift mechanism for speed changing box | |
| CN103498821B (en) | For the hydraulic control system of the speed changer of parallel planetary gear train | |
| CN205207643U (en) | Gearbox controlling means | |
| CN104806747B (en) | Clutch pressure control device | |
| CN104265878A (en) | Braking and micro-motion integrated control system of hydraulic transmission gearbox for forklift truck | |
| CN203500142U (en) | Hydraulic control system used for transmission of parallel-connection planetary gear train | |
| CN102359587B (en) | Manual and automatic integrated speed change system for wheel type hydraulic excavator | |
| CN102401115B (en) | Automatic gear selecting and shifting mechanism for gearbox | |
| US20150152961A1 (en) | Method and apparatus of preventing unintended gear selection in a compound transmission | |
| CN106761660B (en) | Automatic retraction control system and control method for rock drill | |
| JP4743155B2 (en) | Vehicle shift control device | |
| CN105156655A (en) | Gears operating mechanism of loader-digger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |