CN107339393B - Mechanical/stepless speed change dual-purpose gearbox of crawler tractor - Google Patents
Mechanical/stepless speed change dual-purpose gearbox of crawler tractor Download PDFInfo
- Publication number
- CN107339393B CN107339393B CN201710368129.1A CN201710368129A CN107339393B CN 107339393 B CN107339393 B CN 107339393B CN 201710368129 A CN201710368129 A CN 201710368129A CN 107339393 B CN107339393 B CN 107339393B
- Authority
- CN
- China
- Prior art keywords
- transmission gear
- transmission
- gear
- speed change
- gearbox
- 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
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
Abstract
The invention discloses a mechanical/stepless speed change dual-purpose gearbox of a crawler tractor, which is characterized by comprising a power machine flywheel, a clutch friction plate, a gearbox body and a power taking connecting plate, wherein the power taking connecting plate is arranged between the power machine flywheel and the clutch friction plate and is fixedly connected with the power machine flywheel; the invention has the advantages that the hydrostatic stepless speed change device and the external box body are adopted, and the external box body is used for mechanical speed change operation in most of time, thereby being beneficial to improving the mechanical transmission efficiency and greatly reducing the oil consumption.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a mechanical/stepless speed change dual-purpose gearbox of a crawler tractor.
Background
Most of ecological agriculture crawler tractors adopt hydrostatic stepless speed change, and because hydrostatic stepless speed change transmission is lower in efficiency than mechanical transmission, and hydraulic components (particularly domestic hydraulic components) are relatively delicate, high requirements on hydraulic oil and use environment are met, and therefore the use reliability is low. The invention aims to solve the problems, namely, mechanical/stepless speed change is carried out according to the operation requirement, and the mechanical speed change is used for operation in most of the time, thereby being beneficial to improving the mechanical transmission efficiency and greatly reducing the oil consumption; the stepless speed change is used for operation in a small part of time, so that the advantages of stepless speed change operation are maintained, the working time of hydraulic components is reduced, the use reliability of the machine is greatly improved, and the oil consumption is reduced. At present, the mechanical/stepless speed change dual-purpose gearbox of the crawler tractor in China is not suitable for products, and is mostly reformed by a special gearbox of the self-propelled combine harvester. The improvement of the mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is not reported at home and abroad at present.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the mechanical/stepless speed change dual-purpose gearbox of the crawler tractor, which has the advantages of simpler structure, low manufacturing and using cost and more convenient assembly and maintenance.
The technical scheme of the invention is as follows:
the utility model provides a dual-purpose gearbox of crawler tractor machinery/infinitely variable speed, its characterized in that includes power machine flywheel, clutch disc, gear box body and sets up between power machine flywheel and clutch disc and with power machine flywheel fixed connection's power take-off connection board, the inside solid transmission shaft that is equipped with of gear box body, solid transmission shaft outside cover is equipped with hollow transmission shaft, gear box body one side is equipped with and is used for infinitely variable speed driven hydrostatic infinitely variable speed device, and the opposite side is equipped with and is used for mechanically variable speed driven external box body, solid transmission shaft one end is connected with power machine flywheel transmission through power take-off connection board, and the other end is connected with hydrostatic infinitely variable speed device and external box body transmission respectively, external box body inside is provided with and can advance high gear, advance low gear and reverse gear switching's mechanical variable speed device.
The mechanical speed change device inside the external box body comprises a transmission gear p, a transmission gear q, a transmission gear r, a transmission gear s, a transmission gear t, a transmission gear u, a transmission gear v and a transmission gear w, wherein the transmission gear p, the transmission gear q and the transmission gear r are coaxially arranged, the transmission gear s, the transmission gear t and the transmission gear u are coaxially arranged, the transmission gear v and the transmission gear w are coaxially arranged, the transmission gear p is always meshed with the transmission gear s and the transmission gear u, the transmission gear v and the transmission gear w are duplex gears, and the transmission gear v and the transmission gear w can be simultaneously meshed with the transmission gear t, the transmission gear q and the transmission gear r along the left and right movement of a shaft, so that reverse gear, forward high gear and forward low gear switching can be performed.
The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized in that one end of the hollow transmission shaft is connected with the power take-off connecting plate through a clutch friction plate, and the other end of the hollow transmission shaft is connected with a power output shaft through a gear set transmission.
The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized in that an intermediate shaft is arranged in the gearbox body, and an intermediate transmission gear is arranged on the intermediate shaft.
The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized in that the solid transmission shaft is directly connected with a flywheel of a power machine through a power-taking connecting plate without a clutch friction plate.
The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized in that the hydrostatic stepless speed change device and the external gearbox body are independently driven by a solid transmission shaft and the gearbox body.
The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized in that a central transmission gear and steering gears symmetrically arranged on two sides of the central transmission gear are arranged in a gearbox body, and the central transmission gear is respectively combined with the steering gears on two sides to realize left and right steering of the machine.
The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized in that the hollow transmission shaft and the solid transmission shaft are independently driven.
The invention has the advantages that the hydrostatic stepless speed change device and the external box body are adopted, and the external box body is used for mechanical speed change operation in most of time, thereby being beneficial to improving the mechanical transmission efficiency and greatly reducing the oil consumption; the hydrostatic stepless speed change device is used for operation in a small part of time, so that the advantages of stepless speed change operation are reserved, the working time of hydraulic components is reduced, the use reliability of the machine is greatly improved, the oil consumption is reduced, the failure rate of a gearbox is reduced, the maintenance cost is reduced, the external gearbox body provides forward high, forward low and reverse gears, three different gears are switched, different transmission requirements can be met, and the practicability of the hydraulic stepless speed change device is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a power take-off transmission roadmap of the invention;
FIG. 3 is a chart of a walking infinitely variable transmission of the present invention;
fig. 4 is a mechanical variable transmission roadmap of the invention:
in the figure: 1-power machine flywheel, 2-solid transmission shaft, 3-power-taking connection plate, 4-clutch friction plate, 5-hollow transmission shaft, 6-hydrostatic stepless speed change device (HST), 7-intermediate shaft, 8-intermediate transmission gear, 9-gearbox body, 10-power output shaft, 11-push brake, 12-external gearbox body, Z1-transmission gear a, Z2-transmission gear B, Z3-transmission gear C, Z4-transmission gear D, Z5-transmission gear e, Z6-transmission gear f, Z7-transmission gear g, Z8-transmission gear h, Z9-transmission gear I, Z10-transmission gear j, Z11-transmission gear k, Z12-drive gear l, Z13-steering gear, Z14-central drive gear, Z15-drive gear m, Z16-drive gear n, Z17-drive gear o, Z18-drive gear p, Z19-drive gear q, Z20-drive gear r, Z21-drive gear s, Z22-drive gear t, Z23-drive gear u, Z24-drive gear v, Z25-drive gear w, Z1'-I drive gear, Z2' -II drive gear, Z3 '-drive gear A, Z4' -drive gear B, Z5'-I driven gear, Z6' -II driven gear, Z7 '-drive gear C, Z8' -drive gear D.
Detailed Description
The present invention will be described in detail below with reference to the drawings attached to the specification.
As shown in fig. 1-4, a crawler tractor mechanical/stepless speed change dual-purpose gearbox comprises a power machine flywheel 1, a solid transmission shaft 2, a power taking connection plate 3, a clutch friction plate 4, a hollow transmission shaft 5, a hydrostatic stepless speed change device (HST) 6, an intermediate shaft 7, an intermediate transmission gear 8, a gearbox body 9, a power output shaft 10, a pushing brake 11 and an external box body 12; the gear box body 9 comprises a transmission gear aZ1, a transmission gear bZ2, a transmission gear cZ3, a transmission gear dZ4, a transmission gear eZ, a transmission gear fZ6, a transmission gear gZ, a transmission gear hZ8, a transmission gear iZ9, a transmission gear jZ, a transmission gear kZ11, a transmission gear lZ, a steering gear Z13, a central transmission gear Z14, a transmission gear mZ15, a transmission gear nZ16, a transmission gear oZ17, an I-gear driving gear Z1', an II-gear driving gear Z2', a transmission gear aZ3', a transmission gear bZ4', an I-gear driven gear Z5', an II-gear driven gear Z6', a transmission gear cZ7 'and a transmission gear dZ8'; the external box body comprises a transmission gear pZ18, a transmission gear qZ19, a transmission gear rZ20, a transmission gear sZ21, a transmission gear tZ22, a transmission gear uZ, a transmission gear vZ24 and a transmission gear wZ.
The upper part in the gearbox body 9 is provided with a solid transmission shaft 2 and a hollow transmission shaft 5, the middle part of the gearbox body 9 is provided with a middle shaft 7 and a power output shaft 10, the gearbox body 9 and the external box body 12 are also provided with a plurality of transmission gears and bearings, and the external box body 12 is internally provided with a mechanical speed changing device capable of switching forward high gear, forward low gear and reverse gear.
When the mechanical/stepless speed change dual-purpose gearbox is switched to a mechanical speed change device, the output rotating speed of the hydrostatic stepless speed change device (HST) is 0-3000 revolutions per minute, the rotating speed of a control handle is 0 in the middle position, and the stepless speed change has no power input; when the mechanical speed changing device is hung on a high gear, a low gear or a reverse gear, the mechanical speed changing operation can be carried out by the machine tool. When the mechanical speed changing device is placed in neutral position, no power is input in mechanical speed changing, and the hydrostatic stepless speed changing device 6 is operated to perform stepless speed changing operation; the mechanical/stepless speed change is carried out according to the operation requirement, and the mechanical speed change is used for operation in most of the time, so that the mechanical transmission efficiency is improved, and the oil consumption is greatly reduced; the invention can save the advantages of stepless speed change operation, reduce the working time of hydraulic components, greatly improve the use reliability of the machine, reduce the oil consumption, greatly reduce the failure rate of the gearbox and reduce the maintenance cost. When the hydraulic stepless speed change device (HST) 6 is removed, the invention can be used as a purely mechanical speed change machine after the upper cover plate is covered, so that the manufacturing and using cost of the machine is greatly reduced.
Example 1:
the invention relates to a continuously variable transmission of a crawler tractor, which adopts a direct connection mode with a power machine, wherein power is transmitted to an I-gear driving gear Z1 '/I-gear driven gear Z5'. Fwdarw.a transmission gear CZ7 '/transmission gear AZ 3'. Fwdarw.a transmission gear BZ4 '/transmission gear DZ 8'. Fwdarw.a power output shaft 10 through a clutch and a hollow transmission shaft 5; or power is transmitted to the II-gear driving gear Z2 '/II-gear driven gear Z6'. Fwdarw.transmission gear CZ7 '/transmission gear AZ 3'. Fwdarw.transmission gear BZ4 '/transmission gear DZ 8'. Fwdarw.power output shaft 10 through the clutch by the hollow transmission shaft 5; two speeds are provided for the power take-off shaft 10.
Example 2:
the transmission force of the continuously variable traveling transmission is transmitted from the solid transmission shaft 2 to the transmission gear eZ/transmission gear fz6→the hydrostatic continuously variable transmission (HST) 6→the transmission gear dZ 4/transmission gear cZ3→the transmission gear gZ/transmission gear iZ9 (or transmission gear bZ 2/transmission gear aZ1 or transmission gear hZ/transmission gear jZ) →the Z10 transmission gear j/Z11 transmission gear k→the transmission gear lZ/central transmission gear Z14→the steering gear Z13/transmission gear mz15→the transmission gear nZ 16/transmission gear oZ17 →the drive shaft.
Example 3:
the power of the mechanical shift travel transmission is transmitted from the solid shaft 2 to the transmission gear eZ/transmission gear fz6→the reverse transmission gear pZ 18/transmission gear sz21→the transmission gear tZ 22/transmission gear vZ24 (high-gear transmission gear qZ 19/transmission gear wZ25 →the low-gear transmission gear pZ 18/transmission gear sz21→the transmission gear uZ/transmission gear rz20→the transmission gear rZ 20/transmission gear wZ 25) →the transmission gear dZ 4/transmission gear cZ3→the transmission gear gZ 7/transmission gear iZ9 (or the transmission gear bZ 2/transmission gear aZ1 or the transmission gear hZ/transmission gear jZ) →the transmission gear j/Z11 transmission gear k→the transmission gear lZ/central transmission gear Z14→the steering gear Z13/transmission gear mZ15→the transmission gear nz16/transmission gear oZ17→the drive shaft.
A jaw for steering is arranged between the central transmission gear Z14 and the steering gears Z13 at two sides, the jaw can be separated or combined by rotating a steering shifting fork (not shown in the figure), namely, the driving force from the central transmission gear Z14 is cut off or connected, the steering shifting fork is continuously rotated, the steering gears Z13 move outwards to push the brake 11, the steering gears Z13 are braked, the steering gears Z13 are normally meshed with the transmission gears mZ15, the transmission gears mZ15 are braked, and the transmission gears nZ16 which are frequently meshed with the transmission gears oZ finally brake the driving shaft; even if the unit brakes; the steering fork operating rod is released, and the steering gear 13 enables the steering jaw to be recombined under the pushing action of the steering spring, so that the unit runs straight. By rotating the left and right steering shifting forks, the matched machine can conveniently and flexibly realize left and right steering. In a word, the improved machine tool is convenient to assemble and maintain; the failure rate is low, the maintenance cost is low, and particularly, the oil consumption rate of a mechanical speed changer is obviously reduced, so that the overall performance of the speed changer is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The mechanical/stepless speed change dual-purpose gearbox of the crawler tractor is characterized by comprising a power machine flywheel (1), a clutch friction plate (4), a gearbox body (9) and a power taking connecting plate (3) which is arranged between the power machine flywheel (1) and the clutch friction plate (4) and fixedly connected with the power machine flywheel (1), wherein a solid transmission shaft (2) is arranged inside the gearbox body (9), a hollow transmission shaft (5) is sleeved outside the solid transmission shaft (2), a hydrostatic stepless speed change device (6) for stepless speed change transmission is arranged on one side of the gearbox body (9), an external gearbox body (12) for mechanical speed change transmission is arranged on the other side of the gearbox body (9), one end of the solid transmission shaft (2) is in transmission connection with the power machine flywheel (1) through the power taking connecting plate (3), and the other end of the solid transmission shaft is respectively in transmission connection with the hydrostatic stepless speed change device (6) and the external gearbox body (12), and the internal gearbox body (12) is internally provided with a mechanical speed change device capable of carrying out forward high-speed, forward low-speed and reverse-speed switching; the mechanical speed change device in the external box body (12) comprises a transmission gear p (Z18), a transmission gear q (Z19), a transmission gear r (Z20), a transmission gear s (Z21), a transmission gear t (Z22), a transmission gear u (Z23), a transmission gear v (Z24) and a transmission gear w (Z25), wherein the transmission gear p (Z18), the transmission gear q (Z19) and the transmission gear r (Z20) are coaxially arranged, the transmission gear s (Z21), the transmission gear t (Z22) and the transmission gear u (Z23) are coaxially arranged, the transmission gear p (Z18) is in constant mesh with the transmission gear s (Z21) and the transmission gear u (Z23) and the transmission gear r (Z20), the transmission gear v (Z24) and the transmission gear w (Z25) are duplex gears, and the transmission gear v (Z24) and the transmission gear w (Z25) can move left and right along a shaft at the same time, so that the transmission gear v (Z24) and the transmission gear w (Z25) are meshed with the transmission gear t (Z22) and the transmission gear w (Z20) in a reverse gear direction, and the transmission gear w (Z25) is meshed with the forward gear r (Z20) in a reverse gear direction; an intermediate shaft (7) is arranged in the gearbox body (9), and an intermediate transmission gear (8) is arranged on the intermediate shaft (7).
2. The dual-purpose gearbox for crawler tractor machinery/stepless speed change according to claim 1, wherein one end of the hollow transmission shaft (5) is connected with the power take-off connecting plate (3) through a clutch friction plate (4), and the other end is provided with a power output shaft (10) through a gear set transmission connection.
3. The dual-purpose gearbox for crawler tractor machinery/stepless speed change according to claim 1, wherein the solid transmission shaft (2) is directly connected with the flywheel (1) of the power machine through the power-taking connecting plate (3) without a clutch friction plate (4).
4. The dual-purpose gearbox for crawler tractor machinery/stepless speed change according to claim 1, wherein the hydrostatic stepless speed change device (6) and the external gearbox body (12) are independently driven between the solid transmission shaft (2) and the gearbox body (9).
5. The mechanical/stepless speed change dual-purpose gearbox of a crawler tractor according to claim 1, wherein a central transmission gear (Z14) and steering gears (Z13) symmetrically arranged on two sides of the central transmission gear (Z14) are arranged in the gearbox body (9), and the central transmission gear (Z14) is respectively combined with the steering gears (Z13) on two sides to realize left and right steering of a machine tool.
6. A dual purpose gearbox for a crawler tractor machine/continuously variable transmission according to claim 1 or 2, characterized in that the hollow drive shaft (5) and the solid drive shaft (2) are driven independently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368129.1A CN107339393B (en) | 2017-05-23 | 2017-05-23 | Mechanical/stepless speed change dual-purpose gearbox of crawler tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368129.1A CN107339393B (en) | 2017-05-23 | 2017-05-23 | Mechanical/stepless speed change dual-purpose gearbox of crawler tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107339393A CN107339393A (en) | 2017-11-10 |
| CN107339393B true CN107339393B (en) | 2023-08-22 |
Family
ID=60220213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710368129.1A Active CN107339393B (en) | 2017-05-23 | 2017-05-23 | Mechanical/stepless speed change dual-purpose gearbox of crawler tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107339393B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011714A (en) * | 2002-06-05 | 2004-01-15 | Mitsubishi Agricult Mach Co Ltd | Running vehicle for working |
| CN102979878A (en) * | 2012-11-23 | 2013-03-20 | 浙江理工大学 | Modular-design HST (Hydrostatic stepless transmission) and step transmission combined transmission case |
| JP2013090609A (en) * | 2011-10-27 | 2013-05-16 | Iseki & Co Ltd | Combine harvester |
| CN203009762U (en) * | 2012-11-23 | 2013-06-19 | 浙江理工大学 | HST and step speed regulation combined agricultural machinery gearbox |
| CN104343935A (en) * | 2014-10-09 | 2015-02-11 | 浙江云洲科技有限公司 | Stepless transmission box of caterpillar tractor |
| CN204805445U (en) * | 2015-07-21 | 2015-11-25 | 浙江云洲科技有限公司 | Light -duty track type tractor gearbox |
| CN105090431A (en) * | 2015-09-16 | 2015-11-25 | 湖南农业大学 | Integrated transmission for tracked vehicle |
| CN205089929U (en) * | 2015-10-22 | 2016-03-16 | 吉首市宗南重工制造有限公司 | Machine liquid hybrid -driven formula gearbox |
| CN206904180U (en) * | 2017-05-23 | 2018-01-19 | 浙江云洲科技有限公司 | A kind of dual-purpose gearbox of track type tractor machines/variable speed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008151527A1 (en) * | 2007-06-11 | 2008-12-18 | Hongjian Zhao | Mechanical-hydraulic combined transmission device |
-
2017
- 2017-05-23 CN CN201710368129.1A patent/CN107339393B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011714A (en) * | 2002-06-05 | 2004-01-15 | Mitsubishi Agricult Mach Co Ltd | Running vehicle for working |
| JP2013090609A (en) * | 2011-10-27 | 2013-05-16 | Iseki & Co Ltd | Combine harvester |
| CN102979878A (en) * | 2012-11-23 | 2013-03-20 | 浙江理工大学 | Modular-design HST (Hydrostatic stepless transmission) and step transmission combined transmission case |
| CN203009762U (en) * | 2012-11-23 | 2013-06-19 | 浙江理工大学 | HST and step speed regulation combined agricultural machinery gearbox |
| CN104343935A (en) * | 2014-10-09 | 2015-02-11 | 浙江云洲科技有限公司 | Stepless transmission box of caterpillar tractor |
| CN204805445U (en) * | 2015-07-21 | 2015-11-25 | 浙江云洲科技有限公司 | Light -duty track type tractor gearbox |
| CN105090431A (en) * | 2015-09-16 | 2015-11-25 | 湖南农业大学 | Integrated transmission for tracked vehicle |
| CN205089929U (en) * | 2015-10-22 | 2016-03-16 | 吉首市宗南重工制造有限公司 | Machine liquid hybrid -driven formula gearbox |
| CN206904180U (en) * | 2017-05-23 | 2018-01-19 | 浙江云洲科技有限公司 | A kind of dual-purpose gearbox of track type tractor machines/variable speed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107339393A (en) | 2017-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204573064U (en) | power-shift transmission | |
| CN107165990A (en) | There is the transmission assembly that power high to low gear and power commutate for tractor | |
| CN103277478A (en) | Combined-harvester four-gear gearbox assembly | |
| CN103291853A (en) | Power structure of engine gearbox body | |
| CN104044452A (en) | Multi-gear tractor transmission with mechanical reversing and load gear shifting | |
| CN107461472A (en) | Power shifting and power commutation gear box of tractor | |
| CN207246339U (en) | A kind of more power output speed changing boxes of tractor | |
| CN105508544A (en) | Combined harvester hydraulic power gearshift transmission case | |
| CN107339393B (en) | Mechanical/stepless speed change dual-purpose gearbox of crawler tractor | |
| CN104015612A (en) | Power reduction gearbox of tractor implement | |
| CN113007291A (en) | Electrically-driven heavy truck multi-gear transmission system and control method thereof | |
| CN211364238U (en) | Dual-motor multi-gear coupling driving system | |
| CN207145545U (en) | The transmission assembly with power high to low gear and power commutation for tractor | |
| CN201705884U (en) | Gearbox for tire-type road roller | |
| CN207701695U (en) | Gearbox driving device of wheeled tractor | |
| CN206904180U (en) | A kind of dual-purpose gearbox of track type tractor machines/variable speed | |
| CN217227285U (en) | Unpowered interrupt type multi-gear power split hybrid power driving system | |
| CN203876575U (en) | Multi-gear tractor transmission device with mechanical reversing and load gear shifting functions | |
| CN207278817U (en) | A kind of power shifting and power commutation gear box of tractor | |
| CN211288621U (en) | Power reversing speed change assembly and high-low gear reversing system | |
| CN209041468U (en) | The speed ratios rank full power manual transmissions such as 16 speed of one kind | |
| CN203233706U (en) | Combine-harvester five-gear transmission assembly | |
| CN208295048U (en) | Orchard type multi gear position gear box of tractor | |
| CN208024792U (en) | Big-powered tractor actuating unit | |
| CN205605758U (en) | Combine hydraulic power gearbox of shifting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |