Search

CN-224197589-U - Agricultural machine gearbox

CN224197589UCN 224197589 UCN224197589 UCN 224197589UCN-224197589-U

Abstract

The utility model belongs to the technical field of agricultural machinery, and relates to an agricultural machinery gearbox, which comprises an input shaft, a driving transmission mechanism, a steering transmission mechanism and a planetary differential mechanism, wherein a first hydrostatic transmission device and a second hydrostatic transmission device are arranged outside the gearbox body of the gearbox in parallel, a main input gear is arranged on the input shaft, a first hydrostatic transmission input gear and a second hydrostatic transmission input gear are respectively meshed on two sides of the main input gear, the input shaft of the first hydrostatic transmission device is in spline connection with the first hydrostatic transmission input gear, an output shaft of the first hydrostatic transmission device is in spline connection with the driving input gear, the input shaft of the second hydrostatic transmission device is in spline connection with the second hydrostatic transmission input gear, and the output shaft of the second hydrostatic transmission device is in spline connection with the steering input gear. The agricultural machinery gearbox provided by the utility model has the advantages of compact structure, reasonable layout, quick output response and the like.

Inventors

  • CHEN BO
  • LIAN TING
  • LIN XIANJIAN
  • YE RONGZHI

Assignees

  • 台州雄宇机械有限公司

Dates

Publication Date
20260505
Application Date
20250529

Claims (7)

  1. 1. The utility model provides an agricultural machine gearbox, includes input shaft, drive transmission mechanism, turns to drive transmission mechanism, planetary differential mechanism, the input shaft links to each other with power device, drive transmission mechanism links to each other with intermediate gear (2) of planetary differential mechanism (1), turn to drive transmission mechanism and differential gear (3) of planetary differential mechanism link to each other, its characterized in that, box (4) outer parallel arrangement of gearbox has first hydrostatic transmission and second hydrostatic transmission, be provided with main input gear (5) on the input shaft, the both sides of main input gear (5) meshing respectively have first hydrostatic transmission input gear (6) and second hydrostatic transmission input gear (7), first hydrostatic transmission's input shaft and first hydrostatic transmission input gear (6) spline connection, output shaft and drive input gear (8) spline connection, second hydrostatic transmission's input shaft and second hydrostatic transmission input gear (7) spline connection, output shaft and turn to input gear (9) spline connection.
  2. 2. An agricultural machine gearbox according to claim 1, characterized in that the drive transmission comprises a drive input gear (8), a gear-shifting gear set (10) and a speed-changing gear set (11), the gear-shifting gear set (10) comprises a gear-shifting input gear, a first gear and a second gear which are sleeved on a gear shaft, the first gear and the second gear are selectively connected with the gear shaft, the speed-changing gear set (11) comprises a primary speed-changing gear and a secondary speed-changing gear, the primary speed-changing gear is meshed with the first gear, the intermediate gear (2), and the secondary speed-changing gear is meshed with the second gear.
  3. 3. An agricultural machine gearbox according to claim 2, characterized in that a synchronizer (13) driven by a shifting fork (12) is arranged on a gear shaft of the gear shifting gear set (10) in a sliding manner, the synchronizer (13) changes the transmission state of the gear shaft, a first gear and a second gear through axial movement, the shifting fork (12) is driven by a gear shifting rocker arm (14), and the gear shifting rocker arm (14) extends to the outer side of the box body (4).
  4. 4. An agricultural machine gearbox according to claim 2, characterized in that one side of the speed change gear set (11) is provided with a brake mechanism (15) for braking its gear shaft.
  5. 5. An agricultural machine gearbox according to claim 1, characterized in that the steering transmission mechanism comprises a steering input gear (9), a duplex gear (16), a reversing gear set (17) and an idler gear (18), wherein two gears of the duplex gear (16) are respectively meshed with the steering input gear (9) and a gear in the middle of the reversing gear set (17), a gear on the left side of the reversing gear set (17) is meshed with a differential gear (3) on the left side, a gear on the right side is meshed with the idler gear (18), and the idler gear (18) is meshed with the differential gear (3) on the right side.
  6. 6. An agricultural machine gearbox according to claim 1, characterized in that a first mounting seat (19) and a second mounting seat (20) are arranged on one side of the box body (4) in parallel, the first hydrostatic transmission device is fixedly connected with the first mounting seat (19), the second hydrostatic transmission device is fixedly connected with the second mounting seat (20), and the input shaft and the output shaft of the first hydrostatic transmission device, the second hydrostatic transmission device are all arranged up and down.
  7. 7. An agricultural machine gearbox according to claim 1, characterized in that the main input gear (5) is centrally arranged in the front-rear direction, the first and second hydrostatic transmissions being distributed front-rear, the drive transmission and the steering transmission being distributed front-rear.

Description

Agricultural machine gearbox Technical Field The utility model belongs to the technical field of agricultural machinery, and relates to an agricultural machinery gearbox. Background The conventional agricultural machine gearbox adopts a mechanical gearbox, has complex structure, various internal gears and inconvenient speed change and steering, and has difficult to meet the requirements along with the increasing requirements of the agricultural machine gearbox. The hydrostatic transmission device (Hydrostatic Transmission, HST) is adopted to replace the traditional structure, and the HST is a stepless speed change transmission device based on the hydrostatic principle and mainly comprises a plunger variable pump, a plunger quantitative motor, a cycloid oil supplementing pump, a hydraulic control valve and the like, so that a closed loop is formed. The engine drives the plunger variable pump to rotate, and the inclination angle of a variable disc of the variable pump is changed through the control handle, so that the displacement and the direction of the plunger pump are changed, and the flow and the pressure of the output hydraulic oil are also changed. The hydraulic oil drives the plunger quantitative motor to output different rotating speeds and directions. The angle of the variable disc of the plunger pump can be continuously adjusted, and the output rotating speed of the plunger motor is also continuously changed, so that the stepless speed change of the running gear is realized, and the requirements of different working conditions are met. Through the HST transmission system, the transmission structure can be simplified, the number of gears is reduced, and the walking control and steering can be more convenient. Chinese patent No. 201376594Y (publication No. 2010-01-06) is a vehicle hydromechanical integrated transmission comprising a main transmission portion including an input shaft, a first hydrostatic transmission, a steering differential portion including a second hydrostatic transmission and left and right planetary differentials, and a rim transmission portion through which a portion of the power from the engine is transmitted to the rim transmission portion, and through which another portion is transmitted to the rim transmission portion. The second hydrostatic transmission transmits power only when the tracked vehicle is turning. The gearbox is driven by two hydrostatic driving devices, wherein the main input shaft is connected with the walking HST, one gear on the main input shaft distributes power to the steering HST, the layout mode can enlarge the required axial dimension of the gearbox, and the gear design in the gearbox is not compact enough. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides the agricultural mechanical gearbox which has the advantages of compact structure, reasonable layout, quick output response and the like. In order to solve the technical problems, the aim of the utility model is realized by the following technical scheme: The utility model provides an agricultural machine gearbox, includes input shaft, drive transmission mechanism, turns to drive transmission mechanism, planetary differential mechanism, the input shaft links to each other with power device, drive transmission mechanism links to each other with planetary differential mechanism's intermediate gear, turn to drive transmission mechanism and planetary differential mechanism's differential gear link to each other, the box parallel arrangement of gearbox has first hydrostatic transmission and second hydrostatic transmission outward, be provided with the main input gear on the input shaft, the both sides of main input gear have meshed first hydrostatic transmission input gear and second hydrostatic transmission input gear respectively, first hydrostatic transmission input gear spline connection, output shaft and drive input gear spline connection, second hydrostatic transmission's input shaft and second hydrostatic transmission input gear spline connection, output shaft and turn to input gear spline connection. In the agricultural machinery gearbox, the drive transmission mechanism comprises a drive input gear, a gear shifting gear set and a speed changing gear set, the gear shifting gear set comprises a gear shifting input gear, a first gear and a second gear which are sleeved on a gear shaft in an empty mode, the first gear and the second gear are selectively connected with the gear shaft, the speed changing gear set comprises a first speed changing gear and a second speed changing gear, the first speed changing gear is meshed with the first gear and an intermediate gear, and the second speed changing gear is meshed with the second gear. In the agricultural machinery gearbox, a synchronizer driven by a shifting fork is arranged on a gear shaft of the shifting gear set in a sliding mode, the synchronizer changes transmission states of the gear shaft, a first gear