CN214305224U - AMT hydraulic gear shifting or reversing executing device for tractor - Google Patents
AMT hydraulic gear shifting or reversing executing device for tractor Download PDFInfo
- Publication number
- CN214305224U CN214305224U CN202120235577.6U CN202120235577U CN214305224U CN 214305224 U CN214305224 U CN 214305224U CN 202120235577 U CN202120235577 U CN 202120235577U CN 214305224 U CN214305224 U CN 214305224U
- Authority
- CN
- China
- Prior art keywords
- piston
- gear shifting
- sliding rod
- shifting
- sliding
- 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
Images
Landscapes
- Gear-Shifting Mechanisms (AREA)
Abstract
An AMT hydraulic gear shifting or reversing executing device for a tractor comprises: the gear shifting mechanism comprises a shell, a gear shifting piston rod, a shifting fork, a sliding rod seat, an electromagnetic proportional valve and the like. The hydraulic oil is respectively controlled by two electromagnetic proportional valves to fill and discharge and pressure of hydraulic oil in oil cavities at two ends of the piston rod, so that the action of the slide rod and the shifting fork is realized, and the gear shifting of two gears is completed. The utility model discloses simple structure, reliability height, shift fork adjustment of shifting are convenient.
Description
Technical Field
The utility model relates to a tractor field, what specifically says so is a tractor is with AMT hydraulic pressure shift or switching-over final controlling element.
Background
At present, various high and medium power tractors produced in China are low in electric control and intelligent degrees of tractors matched with mechanical gear shifting gearboxes, and in order to effectively reduce the gear shifting operating force of the tractors, the operating convenience is improved, and the intelligent operation of the mechanical gear shifting tractors is gradually realized. At present, the traditional AMT hydraulic gear shifting actuating mechanism in China is mainly applied to road vehicles such as automobiles and the like and does not appear in a tractor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, reliability are high, shift fork adjustment convenient tractor is with AMT hydraulic pressure shift or switching-over final controlling element shift.
In order to realize the technical purpose, the adopted technical scheme is as follows: an AMT hydraulic gear shifting or reversing executing device for a tractor comprises a shell, a gear shifting piston rod, a shifting fork, a sliding rod seat, an electromagnetic proportional valve and an oil inlet joint, a sliding cavity, a sliding rod hole and a piston hole which are communicated are coaxially arranged in the shell, a shifting fork is fixedly connected to a section of the shifting piston rod which is arranged in the sliding rod hole, one end of the shifting piston rod is a piston end matched with the piston hole, the end part of the piston end extends into the sliding rod seat, the sliding rod seat is arranged at the tail part of the piston hole in a sealing way, the piston hole is divided into two independent sealing cavities by the piston at the piston end, each sealing cavity is communicated with a control oil passage, and each path is provided with an electromagnetic proportional valve for controlling the on-off of the oil path, the control oil passages controlled by the two electromagnetic proportional valves are communicated with the oil inlet joint arranged on the shell, the other end of the gear shifting piston rod is a slide rod end, and the slide rod end is arranged in the slide cavity in a sliding fit manner.
The sliding rod end is provided with an arc-shaped groove, the shell is also provided with a mounting hole which is arranged corresponding to the sliding rod end and communicated with the sliding cavity, a steel ball which is pre-pressed and propped on the sliding rod end by a spring and a plug is arranged in the mounting hole, and the steel ball is clamped into the arc-shaped groove or separated from the arc-shaped groove along with the sliding of the sliding rod end in the sliding cavity.
And each control oil passage is also connected with a pressure measuring joint.
The shell is provided with a detection window corresponding to the shifting fork.
The utility model has the advantages that: the gear shifting mechanism has the function of AMT electro-hydraulic control gear shifting or reversing, the gear shifting mechanism is connected with a gear shifting synchronizer or an engaging sleeve of the gearbox to realize the reversing function, the gear shifting mechanism is connected with the gear shifting synchronizer or the engaging sleeve of the gearbox to realize the gear shifting function, and the position of a shifting fork is conveniently adjusted by a shifting fork inspection hole.
Drawings
FIG. 1 is a schematic main sectional view of the present invention;
fig. 2 is a schematic top view of the present invention;
in the figure: 1. the gear-shifting device comprises a shell, 2, a gear-shifting piston rod, 3, a shifting fork, 4, an oil inlet joint, 5, a sealing ring, 6, a sliding rod seat, 7, a steel ball, 8, a spring, 9, a plug, 10, an adjusting screw, 11, a pressure measuring joint, 12, an electromagnetic proportional valve, 13, an inspection port cover plate, 14, a bowl-shaped plug sheet, 101, a sliding cavity, 102, a sliding rod hole, 103, a piston hole, 201, a piston end, 202, a sliding rod end, 203 and an arc-shaped groove.
Detailed Description
As shown in figure 1, an AMT hydraulic gear shifting or reversing execution device for a tractor comprises a shell 1, a gear shifting piston rod 2, a shifting fork 3, a sliding rod seat 6, an electromagnetic proportional valve 12 and an oil inlet joint 4, wherein a sliding cavity 101, a sliding rod hole 102 and a piston hole 103 which are communicated are coaxially arranged in the shell 1, the gear shifting piston rod 2 is arranged on one section of the sliding rod hole 102 and is fixedly connected with the shifting fork 3, the shifting fork 3 can be fastened on the gear shifting piston rod 2 through an adjusting screw 10, the sliding rod hole 102 is used for extending out of the shifting fork, when the gear shifting piston rod 2 slides, the shifting fork does not influence the movement, one end of the gear shifting piston rod 2 is a piston end 201 matched with the piston hole 103, an OE-type sealing ring 5 is arranged at the piston of the gear shifting piston rod 2, the end 201 extends into the sliding rod seat 6, two sides of the gear shifting piston rod 2 close to the piston are sealed with the shell 1 and the sliding rod seat 6 through O-type sealing rings, the slide rod seat 6 is arranged at the tail of the piston hole 103 in a sealing mode, the piston of the piston end 201 divides the piston hole 103 into two independent sealing cavities, each sealing cavity is communicated with one control oil duct, each electromagnetic proportional valve 12 used for controlling the on-off of the oil duct is arranged on each path, the control oil ducts controlled by the two electromagnetic proportional valves 12 are communicated with an oil inlet connector 4 arranged on the shell 1, the other end of the gear shifting piston rod 2 is a slide rod end 202, the slide rod end 202 is arranged in the slide cavity 101 in a sliding fit mode, the end portion of the slide rod hole of the shell 1 is sealed through a bowl-shaped plug piece 14 arranged on the shell 1, and the limiting effect can be achieved.
An arc-shaped groove 203 is formed in the sliding rod end 202, a mounting hole which is arranged corresponding to the sliding rod end 202 and communicated with the sliding cavity 101 is further formed in the shell 1, a steel ball 7 which is pre-pressed and propped against the sliding rod end 202 through a spring 8 and a plug 9 is arranged in the mounting hole, and the steel ball 7 is clamped into the arc-shaped groove 203 or separated from the arc-shaped groove 203 along with the sliding of the sliding rod end 202 in the sliding cavity 101. The sliding distance of the gear shifting piston rod 2 can be positioned by utilizing the steel ball in a compressed state, the gear shifting piston rod 2 can be prevented from returning when moving to the right side, and the gear shifting piston rod can be repeatedly used.
And each control oil passage is also connected with a pressure measuring joint 11.
The shell 1 is provided with an inspection window corresponding to the shifting fork 3, the inspection window is fixed at the inspection window by an inspection window cover plate 13 through bolts, and the inspection window cover plate 13 is detached when inspection is needed, so that inspection work can be carried out.
Two control oil passages are arranged in the shell 1 and are respectively provided with two electromagnetic proportional valves 12, and the electromagnetic proportional valves 12 can control the on-off time of the valve cores through calibration so as to realize smooth shifting process. The two electromagnetic proportional valves 12 respectively control the oil on and off of the two sides of the piston of the gear shifting piston rod 2, when oil enters the piston cavity on the left side of the gear shifting piston rod 2, the gear shifting piston rod 2 slides rightwards to drive the shifting fork 3 to shift gears, after the gears are shifted in place, the electromagnetic proportional valves 12 are powered off, the gear shifting piston rod 2 is positioned by the steel ball 7, and the gear shifting is completed. When the gear needs to be shifted to the other side, the other electromagnetic proportional valve 12 is electrified, hydraulic oil enters the other side of the piston of the gear shifting piston rod 2, the gear shifting piston rod 2 is pushed to slide to the other side, and therefore gear shifting is achieved. The oil duct is arranged in the sliding rod seat 6, control oil leaked by the piston can be led back into the shell 1, and meanwhile, the ventilation function can be achieved, and normal action of the gear shifting piston rod 2 is guaranteed. The two pressure measuring connectors 11 are respectively connected with the two control oil ducts, and the control pressure of the system can be detected after the pressure gauge is connected.
Finally, it should be noted that the embodiments selected for use herein for the purpose of disclosing the present invention are presently considered to be suitable, but it should be understood that the present invention is intended to cover all variations and modifications of the embodiments falling within the spirit and scope of the present invention.
The part of the utility model not detailed is prior art.
Claims (4)
1. The utility model provides a tractor is with AMT hydraulic pressure shift or switching-over actuating device which characterized in that: the gear shifting device comprises a shell (1), a gear shifting piston rod (2), a shifting fork (3), a sliding rod seat (6), an electromagnetic proportional valve (12) and an oil inlet connector (4), wherein a sliding cavity (101), a sliding rod hole (102) and a piston hole (103) which are communicated with each other are coaxially arranged in the shell (1), the gear shifting piston rod (2) is fixedly connected with the shifting fork (3) on one section of the sliding rod hole (102), one end of the gear shifting piston rod (2) is a piston end (201) matched with the piston hole (103), the end part of the piston end (201) extends into the sliding rod seat (6), the sliding rod seat (6) is hermetically arranged at the tail part of the piston hole (103), the piston of the piston end (201) divides the piston hole (103) into two independent sealed cavities, each sealed cavity is communicated with a control oil passage, each road is provided with the electromagnetic proportional valve (12) for controlling the on-off of the oil passage, the control oil passages controlled by the two electromagnetic proportional valves (12) are communicated with an oil inlet connector (4) installed on the shell (1), the other end of the gear shifting piston rod (2) is a sliding rod end (202), and the sliding rod end (202) is arranged in the sliding cavity (101) in a sliding fit mode.
2. An AMT hydraulic shifting or reversing actuator for tractors according to claim 1, wherein: an arc-shaped groove (203) is formed in the sliding rod end (202), a mounting hole which is arranged corresponding to the sliding rod end (202) and communicated with the sliding cavity (101) is further formed in the shell (1), a steel ball (7) which is pre-pressed and propped on the sliding rod end (202) by a spring (8) and a plug (9) is arranged in the mounting hole, and along with the sliding of the sliding rod end (202) in the sliding cavity (101), the steel ball (7) is clamped into the arc-shaped groove (203) or separated from the arc-shaped groove (203).
3. An AMT hydraulic shifting or reversing actuator for tractors according to claim 1, wherein: each control oil passage is also connected with a pressure measuring joint (11).
4. An AMT hydraulic shifting or reversing actuator for tractors according to claim 1, wherein: the shell (1) is provided with a detection window corresponding to the shifting fork (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120235577.6U CN214305224U (en) | 2021-01-28 | 2021-01-28 | AMT hydraulic gear shifting or reversing executing device for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120235577.6U CN214305224U (en) | 2021-01-28 | 2021-01-28 | AMT hydraulic gear shifting or reversing executing device for tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214305224U true CN214305224U (en) | 2021-09-28 |
Family
ID=77830904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120235577.6U Active CN214305224U (en) | 2021-01-28 | 2021-01-28 | AMT hydraulic gear shifting or reversing executing device for tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214305224U (en) |
-
2021
- 2021-01-28 CN CN202120235577.6U patent/CN214305224U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201386785Y (en) | Gear selecting and shifting actuator | |
| CN101245850A (en) | Mechanical automatic speed-changing direct-shifting hydraulic actuator of heavy vehicle | |
| CN111043185B (en) | Integrated low-delay intermediate shaft brake | |
| CN102748464A (en) | Novel three-position cylinder executing mechanism of auxiliary box | |
| CN202251915U (en) | AMT auxiliary box gear shifting cylinder assembly | |
| CN101581362B (en) | Actuator for shift transformation of automatic gearbox of heavy type commercial automobile | |
| CN205047814U (en) | Electronically controlled pneumatic mechanical type automatic gearbox selects gear shift actuating mechanism | |
| CN111486149B (en) | Servo-assistance hydraulic cylinder | |
| CN102434657B (en) | Gear choosing and shifting execution mechanism of mechanical automatic transmission | |
| CN214305224U (en) | AMT hydraulic gear shifting or reversing executing device for tractor | |
| CN212536305U (en) | Cylinder piston positioning device and gearbox with same | |
| CN211259606U (en) | Fluid-driven three-position mechanical gear shifting structure | |
| CN202708037U (en) | Novel auxiliary box three-position air cylinder execution mechanism | |
| CN205371478U (en) | Electrodynamic type four -speed gear shift ware | |
| WO2014026934A1 (en) | Four-state fluid cylinder, method of operating the same, and motor vehicle transmission | |
| CN213870823U (en) | Pneumatic clutch actuating mechanism for automobile transmission system | |
| CN205896139U (en) | Heavy derailleur odd -side gear shift cylinder assembly | |
| CN100516600C (en) | Solenoid valve controlled pneumatic gear shifting device | |
| CN211692993U (en) | Walking hydraulic pilot control system | |
| CN210949836U (en) | Gear shifting cylinder actuating mechanism of new energy vehicle | |
| US5517875A (en) | Gear shifting device of a pneumatic transmission | |
| CN112145676A (en) | Three-position cylinder actuating mechanism | |
| ES2186446A1 (en) | Actuating device for the actuation, in particular pneumatic actuation of a friction clutch | |
| CN201093058Y (en) | Solenoid valve controlled pneumatic gear shifting device | |
| CN101979892A (en) | Truck amt clutch control valve block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |