CN112032261A - Tractor gearbox transmission device - Google Patents

Tractor gearbox transmission device Download PDF

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Publication number
CN112032261A
CN112032261A CN202010903255.4A CN202010903255A CN112032261A CN 112032261 A CN112032261 A CN 112032261A CN 202010903255 A CN202010903255 A CN 202010903255A CN 112032261 A CN112032261 A CN 112032261A
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CN
China
Prior art keywords
gear
shaft
transfer case
assembly
speed change
Prior art date
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Pending
Application number
CN202010903255.4A
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Chinese (zh)
Inventor
汪昌华
王占义
宋美华
李恩强
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Jiangsu World Agricultural Machinery Co Ltd
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Jiangsu World Agricultural Machinery Co Ltd
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Publication date
Application filed by Jiangsu World Agricultural Machinery Co Ltd filed Critical Jiangsu World Agricultural Machinery Co Ltd
Priority to CN202010903255.4A priority Critical patent/CN112032261A/en
Publication of CN112032261A publication Critical patent/CN112032261A/en
Pending legal-status Critical Current

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    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/006—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion power being selectively transmitted by either one of the parallel flow paths
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
    • F16H3/093—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears with two or more countershafts
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/04—Combinations of toothed gearings only
    • F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
    • F16H37/043—Combinations of toothed gearings only change gear transmissions in group arrangement without gears having orbital motion
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0472—Seals
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H2003/0822—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the arrangement of at least one 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0078—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratio comprising twelve or more forward speeds
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/0082—Transmissions for multiple ratios characterised by the number of reverse speeds
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2035—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with two engaging means

Abstract

The invention discloses a transmission device of a tractor gearbox, wherein the front end of an input shaft and the front end of a power output shaft assembly are respectively connected with a clutch assembly, transfer case components are arranged at the front part of a gearbox shell, the transfer case components penetrate through the gearbox shell and are connected with the front end of a connecting shaft, a reverse gear component is arranged on one side of the circumference of the power output shaft assembly and is connected with the power output shaft assembly, a main gear component, an auxiliary gear component and a crawling gear component are sequentially arranged at intervals along the axial direction of the connecting shaft, a first intermediate shaft and a second intermediate shaft are respectively connected with the main gear component and the auxiliary gear component, a small bevel gear shaft and the auxiliary gear component are respectively connected with the crawling gear component, and the reverse gear component is connected with. The invention has large and reasonable gear density, adopts the design of the common gear, reduces the use of the gear, improves the transmission efficiency and simplifies the assembly, enhances the sealing property by placing the transfer case in front of the main transmission, has high ground clearance and is suitable for the requirements of the market on paddy field models.

Description

Tractor gearbox transmission device
Technical Field
The invention relates to the field of agricultural production equipment, in particular to a transmission device of a tractor gearbox.
Background
At present, the tractor gearshift adopts the straight-tooth transmission mostly, and transmission efficiency is lower, because the limitation of gear number to crawling and keeping off and adopting planetary transmission, lead to the structure complicacy, it is with high costs. In addition, because the transfer case is arranged in and is crawled the fender back, and the transmission shaft that is connected with the front axle leaks the part outward longer, and the transmission is unstable, easily hinders when the paddy field operation, is difficult to satisfy more complicated paddy field operation requirement, and mechanical main variable speed adopts traditional meshing cover to shift gears, and the gear engagement is not smooth and easy the jamming.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems, the invention aims to provide a transmission device of a tractor gearbox, which has an optimized structure, improves the gear number, enhances the reliability and stability and is more suitable for paddy field operation.
The technical scheme is as follows: a transmission device of a tractor gearbox comprises a clutch assembly, a transfer case assembly, a gearbox shell, a reverse gear assembly, a main transmission assembly, an auxiliary transmission assembly, a crawling gear assembly, a small bevel gear shaft, a first intermediate shaft, a second intermediate shaft, a power output shaft assembly, an input shaft and a connecting shaft, wherein the reverse gear assembly, the main transmission assembly, the auxiliary transmission assembly, the crawling gear assembly, the small bevel gear shaft, the first intermediate shaft, the second intermediate shaft, the power output shaft assembly, the input shaft and the connecting shaft are arranged in parallel at intervals, the input shaft and the first intermediate shaft are respectively sleeved on the power output shaft assembly, the second intermediate shaft is sleeved on the connecting shaft, the small bevel gear shaft is connected with the tail end of the connecting shaft, the front end of the input shaft and the front end of the power output shaft assembly are respectively connected with the clutch assembly, the transfer case assembly is arranged at the front part of the, the main speed changing assembly, the auxiliary speed changing assembly and the crawling gear assembly are sequentially arranged at intervals along the axial direction of the connecting shaft, the first intermediate shaft and the second intermediate shaft are respectively connected with the main speed changing assembly and the auxiliary speed changing assembly, the bevel pinion shaft and the auxiliary speed changing assembly are respectively connected with the crawling gear assembly, and the reverse gear assembly is connected with the main speed changing assembly.
Furthermore, the transfer case component comprises a transfer case body, a transfer case driving gear, a transfer case transition gear and a transfer case middle transition shaft, the transfer case driven gear, the transfer case output shaft, forerunner's separation sliding sleeve, the transfer case box is installed on the gearbox casing, both inside intercommunications, the transfer case driving gear is installed in the front end of connecting axle, the transfer case intermediate transition axle sets up in the butt joint department of transfer case box and gearbox casing, the transfer case intermediate transition axle is installed in the transfer case box and is parallel with the connecting axle, transfer case transition gear and transfer case intermediate transition axle connect and with the transfer case driving gear meshing, the transfer case output shaft is installed in the transfer case box and is parallel with transfer case intermediate transition axle, the transfer case driven gear is connected and is meshed with transfer case transition gear with the transfer case output shaft, forerunner's separation sliding sleeve establishes in one side square cover of transfer case driving gear and installs on the connecting axle.
Further, the subassembly that reverses gear includes the driving gear that reverses gear, the transition axle that reverses gear, the transition gear that reverses gear one, the transition gear that reverses gear two, the driving gear that reverses gear is installed on the outer peripheral face of input shaft, the transition axle that reverses gear is installed in one side of power output shaft closes piece circumference and is parallel with it, the transition gear that reverses gear one is connected with the front end of the transition axle that reverses gear and with the meshing of the driving gear that reverses gear, the transition gear that reverses gear two is connected with the rear end of the transition axle that reverses gear, the transition gear that reverses gear two is connected with main gear shifting subassembly.
Preferably, the reverse driving gear, the first reverse transition gear and the second reverse transition gear are all helical gears.
Further, the main speed changing assembly comprises a synchronizer, a first gear driving gear and a first gear driven gear, a second gear driving gear and a second gear driven gear, a third gear driving gear and a third gear driven gear, a fourth gear driving gear and a fourth gear driven gear which are meshed with each other in pairs respectively, the fourth gear driving gear, the third gear driving gear, the second gear driving gear and the first gear driving gear are sleeved and arranged on the peripheral surface of the intermediate shaft in turn along the axial direction of the intermediate shaft at intervals from the front end of the intermediate shaft, correspondingly, the four-gear driven gear, the three-gear driven gear, the two-gear driven gear and the one-gear driven gear are sequentially sleeved on the outer peripheral surface of the intermediate shaft at intervals along the axial direction of the intermediate shaft from the front end of the intermediate shaft, a synchronizer is respectively arranged between the one-gear driven gear and the two-gear driven gear and between the three-gear driven gear and the four-gear driven gear, the two synchronizers are respectively sleeved on the intermediate shaft II, and the four-gear driven gear is connected with the reverse gear component.
Preferably, the first-gear driving gear, the first-gear driven gear, the second-gear driving gear, the second-gear driven gear, the third-gear driving gear, the third-gear driven gear, the fourth-gear driving gear and the fourth-gear driven gear are all helical gears.
Further, the auxiliary speed change assembly comprises an auxiliary speed change output shaft, an auxiliary speed change duplicate gear and an auxiliary speed change low-gear driven gear, an auxiliary speed change middle low-gear driving gear and an auxiliary speed change middle low-gear driven gear, an auxiliary speed change middle high-gear driving gear and an auxiliary speed change middle high-gear driven gear, wherein the auxiliary speed change duplicate gear is coaxially connected with the intermediate shaft, the auxiliary speed change output shaft is coaxially connected with the intermediate shaft II, the auxiliary speed change middle low-gear driving gear and the auxiliary speed change middle high-gear driving gear are sequentially sleeved on the outer peripheral surface of the auxiliary speed change middle low-gear driving gear and the auxiliary speed change middle high-gear driven gear at intervals along the axial direction of the auxiliary speed change duplicate gear, correspondingly, the auxiliary speed change middle low-gear driven gear and the auxiliary speed change middle high-gear driven gear are sequentially sleeved on the outer peripheral.
Preferably, the auxiliary transmission duplicate gear, the auxiliary transmission low gear driven gear, the auxiliary transmission medium and low gear driving gear, the auxiliary transmission medium and low gear driven gear, the auxiliary transmission medium and high gear driving gear and the auxiliary transmission medium and high gear driven gear are all helical gears.
Further, the fender subassembly of crawling is including crawling fender duplicate gear, the fender driven gear of crawling, the fender meshing toothholder of crawling, the fender meshing toothsleeve of crawling, the direct fender meshing toothholder of crawling, the fender duplicate gear of crawling is connected with the counter gear subassembly, the driven gear free sleeve of crawling is on the fender meshing toothholder of crawling, the outer lane of the fender meshing toothholder of crawling with crawl keep off the meshing toothsleeve and be connected, the inner circle is connected with the bevel pinion shaft, the inner circle of crawling direct fender meshing toothholder is connected with the counter gear subassembly.
Furthermore, the power output shaft assembly comprises a power output front shaft and a power output rear shaft, the power output front shaft is coaxially connected with the power output rear shaft, the input shaft is sleeved on the power output front shaft, the middle shaft is sleeved on the power output rear shaft, the clutch assembly is connected with the power output front shaft, and the main speed change assembly and the auxiliary speed change assembly are arranged and installed at the joint of the power output front shaft and the power output rear shaft along the axial direction.
Has the advantages that: compared with the prior art, the invention has the advantages that: the gear shifting device can realize 16F +16R gear shifting, has large and reasonable gear density, can meet the speed requirements of users in different operations, and has higher productivity; by adopting the design of a common gear, the use of the gear is reduced, the power flow is reduced, the transmission efficiency is improved to a certain extent, the assembly is simplified, and the cost is reduced; the modular structure is designed, the operation and the control are comfortable, and the assembly is convenient; the main speed change area adopts a synchronizer to shift gears, the gear shifting is quick, and the combination is smooth, so that the gear shifting impact is effectively reduced; the main and auxiliary speed change gears adopt helical gears, and have the advantages of light weight, high strength, large transmission torque, high contact ratio, low noise and low failure rate compared with straight gears; the transfer case is arranged in front of the main transmission, the length of the exposed part of the transmission shaft of the transfer case is reduced, the transmission shaft built-in design is adopted, the sealing performance is enhanced, the ground clearance is high, and the requirement of the market on paddy field type is met; the paddy field work dry land is applicable to 90-120 horsepower sections, is mainly used for paddy field work, is compatible with dry land use, and can meet the user demand mainly for paddy fields.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view E-E of FIG. 1;
wherein, 1, a clutch assembly; 2. a transmission housing; 3. a reverse gear front end cover; 4. a reverse drive gear; 5. a reverse gear transition shaft; 6. a first reverse gear transition gear; 7. a locking plate; 8. a locking sleeve; 9. a second reverse gear transition gear; 10. a fourth gear drive gear; 11. a first intermediate shaft; 12. a power take-off rear axle; 13. a third gear drive gear; 14. a second gear driving gear; 15. a first gear driving gear; 16. a sub-transmission double gear; 17. a low-gear driving gear in the auxiliary transmission; 18. a high-gear driving gear in the auxiliary transmission; 19. a bearing seat plate; 20. a small round nut; 21. a creep gear duplicate gear; 22. a drive bevel gear; 23. a creep gear driven gear; 24. the crawling gear is meshed with the gear sleeve; 25. the crawling direct gear is meshed with the tooth holder; 26. a bevel pinion shaft; 27. a connecting shaft; 28. a needle bearing I; 29. the crawling gear is meshed with the tooth holder; 30. a high-gear driven gear in the auxiliary transmission; 31. a sub-transmission output shaft; 32. an auxiliary speed change engagement tooth holder; 33. a first gear bushing; 34. a needle bearing II; 35. the low-gear driven gear in the auxiliary transmission; 36. a sub-transmission low-gear driven gear; 37. a high gear and a low gear are meshed with the tooth holder; 38. the high and low gears of the auxiliary transmission are meshed with the gear sleeve; 39. a second intermediate shaft; 40. a needle bearing III; 41. a second gear bushing; 42. a first-gear driven gear; 43. a synchronizer; 44. a second driven gear; 45. a third-gear driven gear; 46. a fourth-gear driven gear; 47. a front-drive separation sliding sleeve; 48. a transfer case driving gear; 49. a transfer case driven gear; 50. a transfer case body; 51. an output shaft of the transfer case; 52. a transfer case intermediate transition shaft; 53. a transfer case transition gear; 54. a shaft end cover; 55. a power take-off front axle; 56. an input shaft; 57. an input bearing seat; 58. a neutral switch; 59. a shuttle-type dog-kick; 60. the main and auxiliary gear-shifting operating mechanism assembly.
Detailed Description
The present invention will be further illustrated with reference to the following figures and specific examples, which are to be understood as merely illustrative and not restrictive of the scope of the invention.
A transmission device of a tractor gearbox is shown in figures 1-3 and comprises a clutch assembly 1, a transfer case assembly, a gearbox shell 2, a reverse gear assembly, a main gear assembly, an auxiliary gear assembly, a crawling gear assembly, a power output shaft assembly, a small bevel gear shaft 26, a connecting shaft 27, an input shaft 56, a first intermediate shaft 11 and a second intermediate shaft 39, wherein the reverse gear assembly, the main gear assembly, the auxiliary gear assembly, the crawling gear assembly, the power output shaft assembly and the small bevel gear shaft are installed inside the gearbox shell 2.
The power output shaft assembly and the connecting shaft 27 are arranged in parallel at intervals, the connecting shaft 27 penetrates through the second intermediate shaft 39, the power output shaft assembly comprises a power output front shaft 55 and a power output rear shaft 12, and the power output rear shaft 12 coaxially penetrates through the first intermediate shaft 11 and is coaxially connected with the power output front shaft 55. The input shaft 56 is sleeved on the power output front shaft 55, the front end of the power output front shaft 55 and the front end of the input shaft 56 are respectively connected with the clutch assembly 1, the rear end of the input shaft 56 and the front end of the first intermediate shaft 11 are respectively connected with the reverse gear component, and the reverse gear component is arranged on one side of the circumferential direction of the power output front shaft 55.
The reverse gear assembly comprises a reverse gear driving gear 4, a reverse gear transition shaft 5, a reverse gear transition gear I6, a reverse gear transition gear II 9 and a synchronizer 43, wherein the reverse gear driving gear 4, the reverse gear transition gear I6 and the reverse gear transition gear II 9 are all helical gears. The reverse gear driving gear 4 is installed on the outer peripheral surface of the input shaft 56, the reverse gear transition shaft 5 is installed on one side of the periphery of the power output shaft assembly and is parallel to the power output shaft assembly, the reverse gear transition gear I6 is connected with the front end of the reverse gear transition shaft 5 and is meshed with the reverse gear driving gear 4, the reverse gear transition gear II 9 is connected with the rear end of the reverse gear transition shaft 5, and the reverse gear front end cover 3 is fastened with the gearbox shell 2 through bolts and sealed through an O-shaped ring. A synchronizer 43 is mounted on one side of the reverse drive gear 4, and the synchronizer 43 is spline-engaged with the input shaft 56. When this synchronizer 43 is engaged with the reverse drive gear 4, the reverse shift will now be completed. The fourth-gear driven gear 46 is also used as a reverse gear driven gear, and the design of a common gear is adopted, so that the use of the gears is reduced, the space utilization is reasonable, the assembly is simplified to a certain extent, and the cost is reduced.
The transfer case component is arranged at the front part of the gearbox shell 2 and comprises a transfer case body 50, a transfer case driving gear 48, a transfer case transition gear 53, a transfer case intermediate transition shaft 52, a transfer case driven gear 49, a transfer case output shaft 51 and a front drive separation sliding sleeve 47, wherein the transfer case body 50 is arranged on the gearbox shell 2 and is communicated with the transfer case intermediate transition shaft 48, the transfer case driving gear 48 is arranged at the front end of the connecting shaft 27, the transfer case intermediate transition shaft 52 is arranged at the butt joint part of the transfer case body 50 and the gearbox shell 2, and the transfer case intermediate transition shaft 52 is fixed in the transfer case body 50 through screws and is parallel to the connecting shaft 27. The transfer case transition gear 53 is connected with the transfer case intermediate transition shaft 52 and meshed with the transfer case driving gear 48, the transfer case output shaft 51 is installed in the transfer case body 50 and parallel to the transfer case intermediate transition shaft 52, the transfer case driven gear 49 is connected with the transfer case output shaft 51 and meshed with the transfer case transition gear 53, and the front drive separation sliding sleeve 47 is connected with the connecting shaft 27 between the transfer case driving gear 48 and the second intermediate shaft 39 through spline meshing. The forerunner separation sliding sleeve 47 is axially positioned by a shifting fork arranged at the position, the tail end of the connecting shaft 27 is connected with the small bevel gear shaft 26 through a spline, and when the shifting fork is pushed leftwards, power is transmitted to the front section of the whole gearbox through the spline in the small bevel gear shaft 26 in central transmission, so that forerunner driving can be realized. The two ends of the transfer case output shaft 51 are respectively provided with a rolling bearing which is arranged in a hole of the transfer case body 50, the two ends of the transfer case body 50 are respectively provided with a front end cover and a rear end cover of the transfer case and are fixed by bolts, and two oil seals are arranged in the front end cover of the transfer case. The transfer case component is arranged at the front end of the whole transmission system, the length of the exposed part of a transmission part connected with the transfer case and the front axle is reduced, the built-in design of the transfer case output shaft 51 is adopted, the sealing performance is enhanced, and the requirement of the market on paddy field type is met.
The main speed changing assembly, the auxiliary speed changing assembly and the crawling gear assembly are sequentially arranged at intervals, and the power output shaft assembly and the connecting shaft 27 are sequentially arranged in the main speed changing assembly and the auxiliary speed changing assembly in a penetrating mode respectively.
The main gear assembly comprises a synchronizer 43, a first gear driving gear 15 and a first gear driven gear 42 which are meshed with each other in pairs, a second gear driving gear 14 and a second gear driven gear 44, a third gear driving gear 13 and a third gear driven gear 45, a fourth gear driving gear 10 and a fourth gear driven gear 46, wherein the first gear driving gear 15, the first gear driven gear 42, the second gear driving gear 14, the second gear driven gear 44, the third gear driving gear 13, the third gear driven gear 45, the fourth gear driving gear 10 and the fourth gear driven gear 46 are all helical gears. The four-gear driving gear 10, the three-gear driving gear 13, the two-gear driving gear 14 and the one-gear driving gear 15 are sequentially arranged at intervals along the axial direction from the front end of the first intermediate shaft 11 and are respectively installed on the outer peripheral surface of the first intermediate shaft through spline meshing, correspondingly, a four-gear driven gear 46, a three-gear driven gear 45, a two-gear driven gear 44 and a one-gear driven gear 42 are sequentially sleeved on the outer peripheral surface of the second intermediate shaft 39 at intervals along the axial direction from the front end of the second intermediate shaft 39, a synchronizer 43 is respectively arranged between the first-gear driven gear 42 and the second-gear driven gear 44 and between the three-gear driven gear 45 and the fourth-gear driven gear 46, the two synchronizers 43 are respectively installed on the second intermediate shaft 39 through spline meshing, and the four-gear driven. A needle bearing three 40 and a gear bushing two 41 are respectively arranged in the first-gear driven gear 42, the second-gear driven gear 44, the third-gear driven gear 45 and the fourth-gear driven gear 46, and each gear bushing two 41 is freely sleeved on the intermediate shaft two 39.
The auxiliary transmission assembly comprises an auxiliary transmission output shaft 31, an auxiliary transmission duplicate gear 16 and an auxiliary transmission low-gear driven gear 36 which are meshed with each other in pairs respectively, an auxiliary transmission low-gear driving gear 17 and an auxiliary transmission low-gear driven gear 35, an auxiliary transmission high-gear driving gear 18 and an auxiliary transmission high-gear driven gear 30, wherein the auxiliary transmission duplicate gear 16, the auxiliary transmission low-gear driven gear 36, the auxiliary transmission low-gear driving gear 17, the auxiliary transmission low-gear driven gear 35, the auxiliary transmission high-gear driving gear 18 and the auxiliary transmission high-gear driven gear 30 are all helical gears. The auxiliary transmission duplicate gear 16 is coaxially connected with the first intermediate shaft 11, the auxiliary transmission output shaft 31 is coaxially connected with the second intermediate shaft 39, the auxiliary transmission low-gear driving gear 17 and the auxiliary transmission high-gear driving gear 18 are sequentially arranged at intervals along the axial direction of the auxiliary transmission duplicate gear 16 and are respectively installed on the outer peripheral surface of the auxiliary transmission duplicate gear through spline meshing, and correspondingly, the auxiliary transmission low-gear driven gear 36, the auxiliary transmission low-gear driven gear 35 and the auxiliary transmission high-gear driven gear 30 are sequentially arranged on the outer peripheral surface of the auxiliary transmission output shaft 31 in a sleeved mode at intervals along the axial direction of the auxiliary transmission output shaft 31. A first gear bush 33 and a second needle bearing 34 are respectively arranged in the auxiliary transmission low-gear driven gear 36, the auxiliary transmission low-gear driven gear 35 and the auxiliary transmission high-gear driven gear 30, and each first gear bush 33 is sleeved on the auxiliary transmission output shaft 31 in an empty mode. The big end gear of the auxiliary transmission duplicate gear 16 is arranged in the main transmission area and is internally meshed with the second intermediate shaft 39 in the box cavity of the main transmission area, and the design is favorable for enhancing the bearing capacity of the two gears. When the two are assembled, the rear end of the auxiliary speed change duplicate gear 16 is inclined upwards while the front end of the second intermediate shaft 39 is inclined downwards, and the gear part on the auxiliary speed change output shaft 31 and the gear part on the second intermediate shaft 39 can be directly pushed and installed, so that the assembly is simple.
The crawling gear component comprises a crawling gear dual gear 21, a crawling gear driven gear 23, a crawling gear meshing tooth seat 29, a crawling gear meshing tooth sleeve 24, a crawling direct gear meshing tooth seat 25, the crawling gear dual gear 21 is coaxially connected with the rear end of the auxiliary variable speed dual gear 16, the crawling gear driven gear 23 is sleeved on the crawling gear meshing tooth seat 29, the outer ring of the crawling gear meshing tooth seat 29 is in splined connection with the crawling gear meshing tooth sleeve 24 at the butt joint of the bevel pinion shaft 26 and the auxiliary variable speed output shaft 31, the inner ring of the crawling gear meshing tooth seat 29 is connected with the front end of the bevel pinion shaft 26, and the inner ring of the crawling direct gear meshing tooth seat 25 is connected with the auxiliary variable speed output shaft 31. The shifting fork which is arranged in the groove on the outer side of the crawling gear meshing gear sleeve 24 in a left-right mode can move the crawling gear meshing gear sleeve 24 to the crawling direct gear meshing gear seat 25 or move back to the crawling gear meshing gear seat 29, so that direct gear shifting or crawling gear shifting is achieved, and the crawling gear meshing gear seat 29 is a gear shifting gear seat and a bushing of the crawling gear driven gear 23. The crawling gear can be selected and installed, the speed is reduced by adopting the double-stage cylindrical gear, the structure is simple, the installation and the disassembly are convenient, the cost is low, the lowest speed can reach 4m/min, the paddy field crawling gear is more suitable for the paddy field operation characteristics, and the low speed of a user can be met. Forced lubrication channels are arranged in the shaft end cover 54, the connecting shaft 27, the second intermediate shaft 39 and the auxiliary transmission output shaft 31, lubricating oil enters the shaft end cover 54, the connecting shaft 27, the second intermediate shaft 39 and the auxiliary transmission output shaft 31 through box oil ducts, the left side of the lubricating oil after entering the second intermediate shaft 39 is sealed by an inner boss on the left side of the second intermediate shaft 39, and the right side of the lubricating oil is sealed by an inner boss on the right side of the auxiliary transmission output shaft 31.
The side control box gear engaging module is matched with the variable speed transmission device to realize gear shifting, the side control box gear engaging module comprises a main variable speed control mechanism assembly 60 and the main variable speed control mechanism assembly 60 mainly comprises a shuttle type gear shifting head 59, a shifting fork shaft, a control handle and the like, and is modular in design, convenient to assemble and comfortable to operate.
A neutral switch 58 is arranged on the cover plate of the gearbox, and the neutral switch 58 is in contact with a shuttle-shaped shifting block 59 through a V-shaped groove, so that the starting with a gear can be prevented, and the starting operation accident can be prevented. Meanwhile, a position for installing a forced lubricating device is also reserved on the cover plate of the gearbox, and the structure of the position is used for providing lubrication and cooling for the synchronizer at the reverse gear position.
The gear box of the device is a (1+1) multiplied by 4 combined gear box, can realize gear shifting of 16 forward gears and 16 backward gears, the gears are distributed according to a certain step ratio (1.2), and the gear density is large and reasonable. Meanwhile, a crawling gear can be selected, the lowest speed can reach 4m/min, and the method is more suitable for the characteristics of paddy field operation. And power is transmitted to the front section of the whole gearbox from the small bevel gear in central transmission only through a connecting shaft which directly penetrates through the auxiliary variable speed output shaft and the intermediate shaft II. The transfer case is arranged in front of the main transmission in the design, the length of the exposed part of the transmission shaft of the transfer case is reduced, the sealing performance is enhanced by adopting the built-in design of the transmission shaft, the ground clearance is high, the requirement of the market on paddy field type is met, and the structural design is creative. The reverse gear and main gear shifting area adopts an internal leading synchronizer gear shifting structure, gear shifting is quick, combination is smooth, and gear shifting impact is effectively reduced. The main and auxiliary speed change regions are all provided with helical gears, and compared with straight gears, the main and auxiliary speed change regions have the advantages of light weight, high strength, large transmission torque, high contact ratio, low noise and low failure rate. Adopt the modular side to put the control box structure, control comfortablely, be convenient for dismouting and maintenance are provided with the idle stop switch, can prevent to block the start-up, and the forced lubrication passageway is concentrated, can effectively lubricate key spare part. Compared with the existing tractor with 90-110 horsepower section, the device is suitable for 90-120 horsepower section, is mainly used for paddy field operation and is suitable for dry land.
In conclusion, the tractor gearbox is advanced and original in structure, dense and reasonable in gears, high in reliability and high in paddy field trafficability, is suitable for 90-120 horsepower, is mainly used for paddy field operation, is suitable for dry land, can make up the defects that the existing gearbox is complex in structure, high in cost, long in axial dimension and the like, is particularly suitable for the mechanical manufacturing level of the existing Chinese agricultural machinery enterprises and the requirements of the Chinese situation and the market, and has high cost performance.

Claims (10)

1. A tractor gearbox transmission which characterized in that: the transfer case assembly is arranged on the front part of the transmission case body, the transfer case assembly penetrates through the transmission case body and is connected with the front end of the connecting shaft, the reverse gear assembly is arranged on one circumferential side of the power output shaft assembly and is connected with the front end of the connecting shaft, the main transmission assembly, the auxiliary transmission assembly, the transmission case body and the reverse gear assembly, The crawling gear assembly is sequentially arranged at intervals along the axial direction of the connecting shaft, the first intermediate shaft and the second intermediate shaft are respectively connected with the main gear assembly and the auxiliary gear assembly, the bevel pinion shaft and the auxiliary gear assembly are respectively connected with the crawling gear assembly, and the reverse gear assembly is connected with the main gear assembly.
2. A tractor gearbox transmission as defined in claim 1, wherein: the transfer case component comprises a transfer case body, a transfer case driving gear, a transfer case transition gear and a transfer case middle transition shaft, the transfer case driven gear, the transfer case output shaft, forerunner's separation sliding sleeve, the transfer case box is installed on the gearbox casing, both inside intercommunications, the transfer case driving gear is installed in the front end of connecting axle, the transfer case intermediate transition axle sets up in the butt joint department of transfer case box and gearbox casing, the transfer case intermediate transition axle is installed in the transfer case box and is parallel with the connecting axle, transfer case transition gear and transfer case intermediate transition axle connect and with the transfer case driving gear meshing, the transfer case output shaft is installed in the transfer case box and is parallel with transfer case intermediate transition axle, the transfer case driven gear is connected and is meshed with transfer case transition gear with the transfer case output shaft, forerunner's separation sliding sleeve establishes in one side square cover of transfer case driving gear and installs on the connecting axle.
3. A tractor gearbox transmission as defined in claim 1, wherein: the reverse gear assembly comprises a reverse gear driving gear, a reverse gear transition shaft, a reverse gear transition gear I and a reverse gear transition gear II, the reverse gear driving gear is installed on the outer peripheral surface of the input shaft, the reverse gear transition shaft is installed on one side of the power output shaft assembly in the circumferential direction and is parallel to the power output shaft assembly, the reverse gear transition gear I is connected with the front end of the reverse gear transition shaft and is meshed with the reverse gear driving gear, the reverse gear transition gear II is connected with the rear end of the reverse gear transition shaft, and the reverse gear transition gear II is connected with the main transmission assembly.
4. A tractor gearbox transmission as defined in claim 3, wherein: the reverse gear driving gear, the reverse gear transition gear I and the reverse gear transition gear II are all helical gears.
5. A tractor gearbox transmission as defined in claim 1, wherein: the main gear component comprises a synchronizer, a first gear driving gear and a first gear driven gear which are meshed with each other in pairs, a second gear driving gear and a second gear driven gear, a third gear driving gear and a third gear driven gear, a fourth gear driving gear and a fourth gear driven gear, wherein the fourth gear driving gear, the third gear driving gear, the second gear driving gear and the first gear driving gear are sleeved on the peripheral surface of the intermediate shaft in sequence at intervals along the axial direction from the front end of the intermediate shaft I, correspondingly, the four-gear driven gear, the three-gear driven gear, the two-gear driven gear and the one-gear driven gear are sequentially sleeved on the outer peripheral surface of the intermediate shaft at intervals along the axial direction of the intermediate shaft from the front end of the intermediate shaft, a synchronizer is respectively arranged between the one-gear driven gear and the two-gear driven gear and between the three-gear driven gear and the four-gear driven gear, the two synchronizers are respectively sleeved on the intermediate shaft II, and the four-gear driven gear is connected with the reverse gear component.
6. A tractor gearbox transmission as defined in claim 5, wherein: the first-gear driving gear, the first-gear driven gear, the second-gear driving gear, the second-gear driven gear, the third-gear driving gear, the third-gear driven gear, the fourth-gear driving gear and the fourth-gear driven gear are all helical gears.
7. A tractor gearbox transmission as defined in claim 1, wherein: the auxiliary speed change assembly comprises an auxiliary speed change output shaft, an auxiliary speed change duplex gear and an auxiliary speed change low-gear driven gear which are meshed in pairs respectively, an auxiliary speed change middle low-gear driving gear and an auxiliary speed change middle low-gear driven gear, an auxiliary speed change middle high-gear driving gear and an auxiliary speed change middle high-gear driven gear, the auxiliary speed change duplex gear is coaxially connected with a middle shaft, the auxiliary speed change output shaft is coaxially connected with the middle shaft, the auxiliary speed change middle low-gear driving gear and the auxiliary speed change middle high-gear driving gear are sequentially sleeved on the outer peripheral surface of the auxiliary speed change middle low-gear driving gear and the auxiliary speed change middle high-gear driven gear at intervals along the axial direction of the auxiliary speed change duplex gear, correspondingly, the auxiliary speed change middle low-gear driven gear and the auxiliary speed change high-gear driven gear are sequentially.
8. A tractor powershift gearbox transmission as defined in claim 7, wherein: the auxiliary transmission duplicate gear, the auxiliary transmission low-gear driven gear, the auxiliary transmission medium-low gear driving gear, the auxiliary transmission medium-low gear driven gear, the auxiliary transmission medium-high gear driving gear and the auxiliary transmission medium-high gear driven gear are all helical gears.
9. A tractor gearbox transmission as defined in claim 1, wherein: the crawling gear assembly comprises a crawling gear duplex gear, a crawling gear driven gear, a crawling gear meshing tooth holder, a crawling gear meshing tooth sleeve and a crawling direct gear meshing tooth holder, the crawling gear duplex gear is connected with the auxiliary speed change assembly, the crawling gear driven gear is sleeved on the crawling gear meshing tooth holder in a free mode, the outer ring of the crawling gear meshing tooth holder is connected with the crawling gear meshing tooth sleeve, the inner ring is connected with the bevel pinion shaft, and the crawling direct gear meshing tooth holder is connected with the auxiliary speed change assembly.
10. A tractor gearbox transmission as defined in claim 1, wherein: the power output shaft assembly comprises a power output front shaft and a power output rear shaft, the power output front shaft is coaxially connected with the power output rear shaft, the input shaft is sleeved on the power output front shaft, the intermediate shaft is sleeved on the power output rear shaft, the clutch assembly is connected with the power output front shaft, and the main speed change assembly and the auxiliary speed change assembly are arranged and installed at the joint of the power output front shaft and the power output rear shaft along the axial direction.
CN202010903255.4A 2020-09-01 2020-09-01 Tractor gearbox transmission device Pending CN112032261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010903255.4A CN112032261A (en) 2020-09-01 2020-09-01 Tractor gearbox transmission device

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Application Number Priority Date Filing Date Title
CN202010903255.4A CN112032261A (en) 2020-09-01 2020-09-01 Tractor gearbox transmission device

Publications (1)

Publication Number Publication Date
CN112032261A true CN112032261A (en) 2020-12-04

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Family Applications (1)

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CN202010903255.4A Pending CN112032261A (en) 2020-09-01 2020-09-01 Tractor gearbox transmission device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207701695U (en) * 2017-12-26 2018-08-07 江苏沃得农业机械有限公司 Gearbox driving device of wheeled tractor
CN108547926A (en) * 2018-04-19 2018-09-18 山东时风（集团）有限责任公司 A kind of tractor automatic gear shift transmission device
CN110307325A (en) * 2019-08-01 2019-10-08 第一拖拉机股份有限公司 A kind of used with tractor variable speed drive
CN212775409U (en) * 2020-09-01 2021-03-23 江苏沃得农业机械股份有限公司 Tractor gearbox transmission device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207701695U (en) * 2017-12-26 2018-08-07 江苏沃得农业机械有限公司 Gearbox driving device of wheeled tractor
CN108547926A (en) * 2018-04-19 2018-09-18 山东时风（集团）有限责任公司 A kind of tractor automatic gear shift transmission device
CN110307325A (en) * 2019-08-01 2019-10-08 第一拖拉机股份有限公司 A kind of used with tractor variable speed drive
CN212775409U (en) * 2020-09-01 2021-03-23 江苏沃得农业机械股份有限公司 Tractor gearbox transmission device

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