CN212250994U - Tractor power reversing gearbox transmission device - Google Patents
Tractor power reversing gearbox transmission device Download PDFInfo
- Publication number
- CN212250994U CN212250994U CN202021874728.4U CN202021874728U CN212250994U CN 212250994 U CN212250994 U CN 212250994U CN 202021874728 U CN202021874728 U CN 202021874728U CN 212250994 U CN212250994 U CN 212250994U
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- gear
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- transfer case
- speed change
- crawling
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 129
- 230000007704 transition Effects 0.000 claims abstract description 117
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000009193 crawling Effects 0.000 claims description 59
- 230000002441 reversible effect Effects 0.000 claims description 49
- 230000008859 change Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 5
- 238000000034 method Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000012271 agricultural production Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
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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
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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
- 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
Abstract
The utility model discloses a tractor power switching-over gearbox transmission, power reversing mechanism is connected with the front end of middle transition axle one, the transfer case subassembly is installed in the front portion of transfer case casing and is passed the transfer case casing, the connecting axle closes the piece, middle transition axle two is connected with the transfer case subassembly respectively, main gear subassembly, vice variable speed subassembly, the subassembly of keeping off crawls is arranged along the axial interval in proper order of connecting axle closes the piece, the bevel pinion shaft is connected with the rear end of connecting axle closes the piece, middle transition axle one, middle transition axle two respectively with main variable speed subassembly, vice variable speed subassembly is connected, the bevel pinion shaft, vice variable speed subassembly is connected with the subassembly of keeping off crawl respectively, power reversing mechanism is connected with main variable speed subassembly. The utility model 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; the arrangement is smooth, and oil leakage is not easy to occur; reduce power flow, improve transmission efficiency and simplify assembly, reduce cost, satisfy paddy field user's demand.
Description
Technical Field
The utility model belongs to the technical field of the agricultural production equipment and specifically relates to a tractor power reversing gearbox transmission.
Background
The power reversing tractor realizes the reversing of the tractor under the condition of load force transmission through the combination and the separation of the electromagnetic valves, and the power is not interrupted in the reversing process, so the operation efficiency is improved.
At present, the mode of shifting of most tractor still is mechanical type, and this type of gearshift's 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 receives when the paddy field operation and hinders, is difficult to satisfy more complicated paddy field operation requirement, and mechanical main variable speed adopts traditional meshing cover to shift gears, and it is out of order to put into gear, easy jamming. In addition, the straight-tooth transmission is adopted, so that the transmission efficiency is low, the limitation of the gear number is caused, and the crawling gear adopts planetary transmission, so that the structure is complex and the cost is high. In addition, due to the fact that the gear shifting mechanism is not modularized in operation, dismounting is complex, parking, reversing and starting are needed frequently in the operation process, labor intensity is high, operation efficiency is affected, meanwhile impact load on machines is large, and failure rate is high.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: to the problem, the utility model aims at providing a tractor power switching-over gearbox transmission optimizes the structure, improves the fender position, has higher reliability and stability, can realize the power switching-over and improve the paddy field trafficability characteristic.
The technical scheme is as follows: a power reversing gearbox transmission device of a tractor comprises a transfer case component, a gearbox shell, a power reversing mechanism, a mechanical gear shifting mechanism, a middle transition shaft I, a middle transition shaft II and a connecting shaft assembly, wherein the power reversing mechanism, the mechanical gear shifting mechanism, the middle transition shaft I, the middle transition shaft II and the connecting shaft assembly are arranged in the gearbox shell, the mechanical gear shifting mechanism comprises a main gear shifting component, a sub-gear shifting component, a crawling gear component and a small bevel gear shaft, the middle transition shaft I and the middle transition shaft are arranged in parallel at intervals, the connecting shaft assembly is arranged in the middle transition shaft II in a penetrating mode, the power reversing mechanism is connected with the front end of the middle transition shaft I, the transfer case component is arranged at the front part of the gearbox shell and penetrates through the gearbox shell, the connecting shaft assembly and the middle transition shaft II are respectively connected with the transfer case component, the main gear shifting component, the sub-gear, the middle transition shaft I and the middle transition shaft II are respectively connected with the main speed change assembly and the auxiliary speed change assembly, the bevel pinion shaft and the auxiliary speed change assembly are respectively connected with the crawling gear assembly, and the power reversing mechanism is connected with the main speed change assembly.
Furthermore, the power reversing mechanism comprises a wet clutch assembly, a clutch spline sleeve, a reverse gear driving gear, a reverse gear transition shaft, a reverse gear transition gear I, a reverse gear transition gear II and a hydraulic pipeline, wherein the wet clutch assembly is connected with the front end of the middle transition shaft I through the clutch spline sleeve, the reverse gear transition shaft is arranged on one side of the circumference of the wet clutch assembly and is parallel to the middle transition shaft, the reverse gear driving gear is connected with the clutch shaft of the wet clutch 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 is meshed with the main transmission assembly, the hydraulic pipeline is communicated with the wet clutch assembly, and the hydraulic pipeline is laid on the inner side face of the front cover of the gearbox shell and in the clutch shaft of the wet clutch assembly.
Preferably, the wet clutch assembly includes two wet clutches, a forward wet clutch and a reverse wet clutch, the forward wet clutch is connected to the intermediate transition shaft through a clutch spline housing, and the reverse drive gear is mounted on the clutch shaft of the reverse wet clutch.
Furthermore, the device also comprises a torsional damper which is connected with the clutch shaft of the wet clutch assembly.
The torsional damper can reduce the torsional rigidity of the joint part of the engine crankshaft and the transmission system, thereby reducing the torsional vibration natural frequency of the transmission system; the torsional damping of the transmission system is increased, the corresponding amplitude of torsional resonance is inhibited, and transient torsional vibration generated by impact is attenuated; controlling torsional vibration of a clutch and a transmission shafting when the power transmission assembly idles, and eliminating idle speed noise of the transmission and torsional vibration and noise of a main speed reducer and the transmission; the torsional impact load of the transmission system under the unstable working condition is alleviated, and the engagement smoothness of the clutch is improved.
Furthermore, the transfer case component comprises a transfer case body, a transfer case driving gear, a transfer case transition gear and a transfer case intermediate shaft, the transfer case driven gear, the transfer case output shaft and the front-wheel drive separation sliding sleeve are arranged on the transfer case shell, the transfer case body is arranged on the transfer case shell and is internally communicated with the transfer case shell, the transfer case driving gear is arranged at the front end of the middle transition shaft II, the transfer case middle shaft is arranged at the butt joint of the transfer case body and the transfer case shell, the transfer case middle shaft is connected with the transfer case shell and is parallel to the middle transition shaft, the transfer case transition gear is connected with the transfer case middle shaft and is meshed with the transfer case driving gear, the transfer case output shaft is arranged in the transfer case shell and is parallel to the transfer case middle shaft, the transfer case driven gear is connected with the transfer case output shaft and is meshed with the transfer case transition gear, and the front-wheel drive separation sliding sleeve is sleeved on a connecting shaft assembly.
Further, the main speed changing assembly comprises synchronizers, 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 on the peripheral surface of the middle transition shaft in sequence along the axial direction of the middle transition shaft from the front end of the middle transition shaft I in sequence at intervals, correspondingly, the fourth gear driven gear, the third gear driven gear, the second gear driven gear and the first gear driven gear are sleeved on the peripheral surface of the middle transition shaft II in sequence along the axial direction of the middle transition shaft II in sequence at intervals, one synchronizer is respectively arranged between the first gear driven gear and the second gear, and between the third gear driven gear and the fourth gear driven gear, and the two synchroni, the fourth gear driven gear is connected with the power reversing mechanism.
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 transmission assembly comprises an auxiliary transmission output shaft, an auxiliary transmission duplex driving gear and an auxiliary transmission low-gear driven gear which are meshed with each other in pairs respectively, an auxiliary transmission middle low-gear driving gear and an auxiliary transmission low-gear driven gear, an auxiliary transmission middle high-gear driving gear and an auxiliary transmission middle high-gear driven gear, the auxiliary transmission duplex driving gear is coaxially connected with the rear end of the middle transition shaft I, the front end of the auxiliary transmission output shaft is coaxially connected with the rear end of the middle transition shaft II, the auxiliary transmission middle low-gear driving gear and the auxiliary transmission middle high-gear driving gear are sleeved on the peripheral surface of the auxiliary transmission duplex driving gear at intervals along the axial direction of the auxiliary transmission output shaft correspondingly, the auxiliary transmission low-gear driven gear, the auxiliary transmission middle low-gear driven gear and the auxiliary transmission high-gear driven gear are sleeved on the peripheral surface of the auxiliary transmission output shaft at intervals in order along the axial direction of the auxiliary transmission output shaft correspondingly, and the large-end gear of, the small bevel gear shaft is coaxially butted with the rear end of the auxiliary variable speed output shaft.
Preferably, the auxiliary transmission dual driving 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.
Has the advantages that: compared with the prior art, the utility model 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; the power reversing mechanism is matched with the mechanical gear shifting mechanism, so that power reversing and multi-gear shifting can be realized simultaneously, the arrangement is smooth, and oil leakage is not easy to occur; 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; 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 wet clutch assembly can effectively provide lubrication for key parts; 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 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;
wherein, 1, a front cover of the gear box; 2. a reverse gear transition shaft; 3. a first reverse gear transition gear; 4. a transmission housing; 5. a wet clutch pack; 6. a clutch spline housing; 7. a first middle transition shaft; 8. a power output shaft front end cover; 9. a second reverse gear transition gear; 10. a fourth gear drive gear; 11. a power take-off shaft; 12. a third gear drive gear; 13. a second gear driving gear; 14. a first gear driving gear; 15. an auxiliary speed change duplex driving gear; 16. a low-gear driving gear in the auxiliary transmission; 17. A high-gear driving gear in the auxiliary transmission; 18. a bearing seat plate; 19. a small round nut I; 20. a creep gear duplicate gear; 21. A drive bevel gear; 22. a creep gear driven gear; 23. the crawling gear is meshed with the gear sleeve; 24. the crawling direct gear is meshed with the tooth holder; 25. a bevel pinion shaft; 26. a first connecting shaft; 27. a needle bearing I; 28. the crawling gear is meshed with the tooth holder; 29. a high-gear driven gear in the auxiliary transmission; 30. a sub-transmission output shaft; 31. an auxiliary speed change engagement tooth holder; 32. a first gear bushing; 33. a needle bearing II; 34. the low-gear driven gear in the auxiliary transmission; 35. a sub-transmission low-gear driven gear; 36. a high gear and a low gear are meshed with the tooth holder; 37. the high and low gears of the auxiliary transmission are meshed with the gear sleeve; 38. a middle transition shaft II; 39. a needle bearing III; 40. a second gear bushing; 41. a first-gear driven gear; 42. a synchronizer; 43. a second driven gear; 44. a third-gear driven gear; 45. a fourth-gear driven gear; 46. a transfer case driving gear; 47. a transfer case intermediate shaft; 48. a transfer case transition gear; 49. a transfer case driven gear; 50. an output shaft of the transfer case; 51. a needle bearing IV; 52. a small round nut II; 53. a front-drive separation sliding sleeve; 54. a second connecting shaft; 55. a reverse drive gear; 56. an O-shaped sealing ring; 57. a torsional damper; 58. the main and auxiliary gear-shifting operating mechanism assembly.
Detailed Description
The invention will be further elucidated with reference to the drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
A power reversing gearbox transmission device of a tractor is shown in figures 1 and 2 and comprises a transfer case component, a gearbox shell 4, a torsion damper 57, a power reversing mechanism, a mechanical gear shifting mechanism, a connecting shaft assembly, a first intermediate transition shaft 7 and a second intermediate transition shaft 38, wherein the power reversing mechanism, the mechanical gear shifting mechanism, the first intermediate transition shaft 7 and the second intermediate transition shaft 38 are arranged inside the gearbox shell 4, and the mechanical gear shifting mechanism comprises a main speed changing component, an auxiliary speed changing component, a crawling gear component and a bevel pinion shaft 25.
The first intermediate transition shaft 7 and the second intermediate transition shaft 38 are arranged in parallel at intervals, and the first intermediate transition shaft 7 and the second intermediate transition shaft 38 are supported and arranged on the gearbox shell 4 through rolling bearings respectively. The power reversing mechanism is connected with the front end of the first intermediate transition shaft, the power reversing mechanism comprises a wet clutch assembly 5, a clutch spline sleeve 6, a reverse gear driving gear 55, a reverse gear transition shaft 2, a first reverse gear transition gear 3, a second reverse gear transition gear 9 and a hydraulic pipeline, the wet clutch assembly 5 comprises two wet clutches which are integrally installed together, one of the wet clutches is used for forward gear and the other is used for reverse gear, the wet clutch of the forward gear is connected with the first intermediate transition shaft 7 through the clutch spline sleeve 6, the reverse gear transition shaft 2 is arranged on one side of the circumferential direction of the wet clutch assembly 5 and is parallel to the first intermediate transition shaft 7, the reverse gear driving gear 55 is installed on the clutch shaft of the wet clutch of the reverse gear, the first reverse gear transition gear 3 is connected with the front end of the reverse gear transition shaft 2 and is meshed with the reverse gear driving gear 55, the second reverse gear 9 is connected with the rear end of the reverse gear transition shaft 2, the hydraulic pipeline is communicated with the wet clutch assembly 5, the hydraulic pipeline is laid in the wall of the front cover 1 of the gearbox casing 4 of the gearbox and in the two clutch shafts of the wet clutch assembly 5, and the torsional damper 57 is connected with the clutch shafts of the wet clutch assembly 5. The clutch for controlling power reversing by the power reversing mechanism adopts a wet clutch, and can realize power reversing by a hydraulic control synchronizer and an electric control synchronizer before main speed change. The mechanism is connected with the gearbox only through the clutch spline housing 6, and is simple and fast to assemble and rapid and convenient to maintain. The hydraulic oil circuit is arranged in the front cover 1 of the gearbox and the clutch shaft in a centralized manner, the arrangement is smooth, oil leakage is not easy, a forced lubrication channel is arranged, and key parts can be lubricated in time. The mechanism can be designed in a scaling mode according to horsepower requirements, and is suitable for other machine types.
The main speed changing assembly, the auxiliary speed changing assembly and the crawling gear assembly are sequentially arranged at intervals along the axial direction.
The main gear assembly comprises a synchronizer 42, a first gear driving gear 14 and a first gear driven gear 41, a second gear driving gear 13 and a second gear driven gear 43, a third gear driving gear 12 and a third gear driven gear 44, a fourth gear driving gear 10 and a fourth gear driven gear 45 which are meshed with each other in pairs respectively, and the first gear driving gear 14, the first gear driven gear 41, the second gear driving gear 13, the second gear driven gear 43, the third gear driving gear 12, the third gear driven gear 44, the fourth gear driving gear 10 and the fourth gear driven gear 45 are all helical gears. The four-gear driving gear 10, the three-gear driving gear 12, the two-gear driving gear 13 and the one-gear driving gear 14 are sequentially arranged at intervals along the axial direction from the front end of the first intermediate transition shaft 7 and are mounted on the outer peripheral surface of the first intermediate transition shaft through spline engagement, and correspondingly, the four-gear driven gear 45, the three-gear driven gear 44, the two-gear driven gear 43 and the one-gear driven gear 41 are sequentially mounted on the outer peripheral surface of the second intermediate transition shaft 38 at intervals along the axial direction from the front end of the second intermediate transition shaft. A synchronizer 42 is respectively arranged between the first-gear driven gear 41 and the second-gear driven gear 43 and between the third-gear driven gear 44 and the fourth-gear driven gear 45, the two synchronizers 42 are respectively installed on the second intermediate transition shaft 38 through spline engagement, and the gears are shifted by using the synchronizer 42, so that the advantages of fast gear shifting, smooth combination and effective reduction of gear shifting impact are achieved. A needle bearing III 39 and a gear bushing II 40 are respectively arranged in the first-gear driven gear 41, the second-gear driven gear 43, the third-gear driven gear 44 and the fourth-gear driven gear 45, and each gear bushing II 40 is freely sleeved on the middle transition shaft II 38. The fourth driven gear 45 meshes with the second reverse transition gear 9.
The auxiliary transmission assembly comprises an auxiliary transmission output shaft 30, an auxiliary transmission duplex driving tooth 15 and an auxiliary transmission low-gear driven gear 35 which are meshed with each other in pairs respectively, an auxiliary transmission low-gear driving gear 16 and an auxiliary transmission low-gear driven gear 34, an auxiliary transmission medium-high gear driving gear 17 and an auxiliary transmission medium-high gear driven gear 29, wherein the auxiliary transmission low-gear driven gear 35, the auxiliary transmission low-gear driving gear 16, the auxiliary transmission low-gear driven gear 34, the auxiliary transmission medium-high gear driving gear 17 and the auxiliary transmission medium-high gear driven gear 29 are all helical gears. The auxiliary transmission duplex driving gear 15 is supported and arranged in the gearbox shell 4 through a rolling bearing and is coaxially connected with the first intermediate transition shaft 7, the front end of the auxiliary transmission output shaft 30 is coaxially connected with the rear end of the second intermediate transition shaft 38, the auxiliary transmission low-gear driving gear 16 and the auxiliary transmission high-gear driving gear 17 are sequentially arranged on the outer peripheral surface of the auxiliary transmission duplex driving gear 15 in a sleeved mode at intervals along the axial direction of the auxiliary transmission duplex driving gear, correspondingly, the auxiliary transmission low-gear driven gear 35, the auxiliary transmission low-gear driven gear 34 and the auxiliary transmission high-gear driven gear 29 are sequentially arranged on the outer peripheral surface of the auxiliary transmission output shaft 30 in a sleeved mode at intervals in the axial direction, a first gear bushing 32 and a second needle bearing 33 are respectively arranged in the auxiliary transmission low-gear driven gear 35, the auxiliary transmission low-gear driven gear 34 and the auxiliary transmission high-gear driven gear 29, and each first gear bushing 32 is sleeved on the auxiliary transmission output shaft 30. The big end gear of the auxiliary transmission duplex driving gear 15 is arranged in the main transmission area and is meshed with the middle transition shaft II 38 in the box cavity of the main transmission area, and the design is favorable for enhancing the bearing capacity of the main transmission area and the middle transition shaft II. When the two are assembled, the rear end of the auxiliary transmission duplex driving gear 15 is inclined upwards while the front end of the second intermediate transition shaft 38 is inclined downwards, the auxiliary transmission output shaft 30 and the gear set thereof, the second intermediate transition shaft 38 and the gear set thereof can be directly pushed and installed, and the assembly is simple.
The bevel pinion shaft 25 is coaxially butted with the rear end of the auxiliary transmission output shaft 30, the crawling block assembly comprises a crawling block duplex gear 20, a crawling block passive gear 22, a crawling block meshing gear seat 28, a crawling block meshing gear sleeve 23 and a crawling direct block meshing gear seat 24, the crawling block duplex gear 20 is connected with the auxiliary transmission duplex driving gear 15 through a rolling bearing, the crawling block passive gear 22 is sleeved on the crawling block meshing gear seat 28 through a needle bearing I27 in a free mode, the outer ring of the crawling block meshing gear seat 28 is in splined connection with the crawling block meshing gear sleeve 23, the inner ring of the crawling block meshing gear seat 28 is in splined connection with the bevel pinion shaft 25 at the butt joint of the bevel pinion shaft 25 and the auxiliary transmission output shaft 30, and the inner ring of the crawling direct block meshing gear seat 24 is connected with the auxiliary transmission output shaft 30 at the butt joint of the bevel pinion shaft 25 and the auxiliary transmission output shaft 30. The shifting fork which is arranged in the groove on the outer side of the crawling gear meshing gear sleeve 23 in a left-right mode can move the crawling gear meshing gear sleeve 23 to the crawling direct gear meshing gear seat 24 or move back to the crawling gear meshing gear seat 28, so that direct gear shifting or crawling gear shifting is achieved, and the crawling gear meshing gear seat 28 is a gear shifting gear seat and a bushing of the crawling gear driven gear 22. 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.
The power output shaft 11 is connected with the engine, and the power output shaft 11 sequentially penetrates through the first intermediate transition shaft 7, the auxiliary transmission duplex driving gear 15 and the crawling gear duplex gear 20, namely, the three are sleeved on the power output shaft 11 in a hollow mode. The connecting shaft assembly comprises a first connecting shaft 26 and a second connecting shaft 54, one end of the first connecting shaft 26 is connected with the second connecting shaft 54 through a bearing, the first connecting shaft 26 sequentially penetrates through the second intermediate transition shaft 38 and the inside of the auxiliary variable speed output shaft 30, the other end of the first connecting shaft 26 is connected with the bevel pinion shaft 25, the other end of the second connecting shaft 54 is connected with the gearbox shell 4, a forced lubrication channel is arranged in the first connecting shaft 26, the second connecting shaft 54, the second intermediate transition shaft 38 and the auxiliary variable speed output shaft 30, lubricating oil enters the second connecting shaft 54, the first connecting shaft 26, the second intermediate transition shaft 38 and the auxiliary variable speed output shaft 30 through a box oil duct, the left side of the lubricating oil after entering the second intermediate transition shaft 38 is sealed by a boss in the lubricating oil channel, and the right side of the lubricating oil is sealed.
The transfer case component is arranged at the front part of the transfer case shell 4 and comprises a transfer case body, a transfer case driving gear 46, a transfer case transition gear 48, a transfer case intermediate shaft 47, a transfer case driven gear 49, a transfer case output shaft 50 and a front drive separation sliding sleeve 53, wherein the transfer case body is arranged on the transfer case shell 4 and is communicated with the transfer case intermediate shaft 46, the transfer case driving gear 46 is arranged at the front end of the intermediate transition shaft II 38 through a rolling bearing, one side of the transfer case driving gear 46 is fixed through a small round nut II 52, the transfer case intermediate shaft 47 is arranged at the butt joint part of the transfer case body and the transfer case shell 4, the transfer case intermediate shaft 47 is connected with the transfer case body through a screw and is parallel to the intermediate transition shaft II 38, the transfer case transition gear 48 is connected with the transfer case intermediate shaft 47 through a rolling bearing and is meshed with the transfer case driving gear 46, the transfer case output shaft 50 is arranged in the transfer case body and is, the transfer case driven gear 49 is connected with the transfer case output shaft 50 through a spline and meshed with the transfer case transition gear 48, and the front drive separation sliding sleeve 53 is arranged on one side of the transfer case driving gear 46 and connected with the outer peripheral surface of the front end of the first connecting shaft 26. The front-drive separation sliding sleeve 53 is axially positioned by a shifting fork arranged at the position, when the shifting fork is pushed rightwards, power is transmitted to the front end of the first connecting shaft 26 through an internal spline of the small bevel gear shaft 25 in central transmission, and is transmitted to the transfer case driving gear 46 through the front-drive separation sliding sleeve 53, and therefore the driving switching of the tractor can be achieved. The two ends of the transfer case output shaft 50 are respectively provided with a rolling bearing which is arranged in a transfer case body hole, the two ends of the transfer case body are respectively provided with a transfer case front end cover and a transfer case rear end cover which are fixed by bolts, and two oil seals are arranged in the front end cover. The transfer case component is arranged at the front end of the whole transmission system, the length of the exposed part of the transmission component connected with the transfer case and the front axle is reduced, the built-in design of the transfer case output shaft 50 is adopted, the sealing performance is enhanced, and the requirement of the market on paddy field type is met.
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 and auxiliary variable speed control mechanism assembly 58, and the main and auxiliary variable speed control mechanism assembly 58 comprises a main and auxiliary variable speed gear engaging shifting fork, a shifting fork shaft, a control handle and other parts, and is modular in design, convenient to assemble and comfortable to operate.
The power reversing wet clutch assembly is in a modular design and is connected with the gearbox only through the spline, so that the power reversing wet clutch assembly is simple and quick to assemble and is quick and convenient to maintain. Meanwhile, the module can be subjected to scaling design and is suitable for other machine types. The hydraulic oil circuit is arranged in the front end cover of the gearbox and the main clutch shaft in a centralized manner.
If the current gear is in the forward low fourth gear, the power transmission route is as follows: the clutch shaft-wet clutch assembly of the power input-wet clutch assembly is combined with the clutch spline sleeve, the four-gear driving and driven gear pair, the auxiliary transmission duplex driving gear, the auxiliary transmission low-gear driven gear and the rear axle and the tail end, at the moment, the wet clutch assembly is in a combined state, according to the detected data such as engine torque and the like, the synchronizer on the second gear of the main transmission assembly is combined in advance through an electric control system, and the synchronizer on the fourth gear returns to a neutral gear, so that the low fourth gear is changed into the low second gear (the transmission route is that the clutch shaft-wet clutch assembly of the power input-wet clutch assembly is combined with the clutch spline sleeve, the two-gear driving and driven gear pair, the auxiliary transmission driving gear, the auxiliary transmission low-gear driven gear and the rear axle and the tail end), the power is not interrupted in the whole gear shifting process, and the other gear shifting processes are similar. The 16F +16R gear shifting can be realized through the matching of the electric control gear shifting synchronizer and a wet clutch assembly in the power reversing mechanism.
The power reversing process is as follows: when the machine is in a forward state, the wet clutch pack of the power reverser is disengaged. When the reverse gear is required, the friction plate in the wet clutch assembly is meshed with the spline on the reverse gear driving gear under the pushing of a hydraulic system, and the reverse gear is realized (transmission route: power input-wet clutch assembly combination-reverse gear driving gear-reverse gear transition gear shaft-reverse gear transition gear-four-gear driven gear-mechanical gear shifting mechanism).
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. The control power reversing clutch adopts a wet clutch assembly, is arranged before main speed change, and can realize power reversing through electro-hydraulic control. The hydraulic oil circuit is intensively arranged in the gearbox body, the front end cover of the gearbox and the main clutch shaft, the arrangement is centralized and smooth, oil leakage is not easy to occur, and the reliability is high. The transfer case is arranged in front of a main gear, the length of the exposed part of a 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.
To sum up, the utility model provides an advanced original creation of structure, keep off the position closely and rationally, the reliability is high, can realize power switching-over and power switching-over, the tractor gearbox that paddy field trafficability characteristic is high, this gearbox is suitable for 90 ~ 20 horsepower, mainly used paddy field operation, compromise the dryland and use, can compensate that current power switching-over gearbox structure is complicated, with high costs, axial dimension is longer etc. not enough, be particularly suitable for current china agricultural machinery enterprise machine level of manufacture and china's situation and market demand, have higher price/performance ratio and product keep off the rank, can promote the propulsion of power switching-over technique in china's agricultural field.
Claims (10)
1. The utility model provides a tractor power switching-over gearbox transmission which characterized in that: the power reversing mechanism comprises a main speed changing component, an auxiliary speed changing component, a crawling gear component and a small bevel gear shaft, wherein the power reversing mechanism is arranged inside the gearbox shell, the mechanical gear shifting mechanism, an intermediate transition shaft I, an intermediate transition shaft II and a connecting shaft component are arranged, the mechanical gear shifting mechanism comprises a main speed changing component, an auxiliary speed changing component, a crawling gear component and a small bevel gear shaft, the intermediate transition shaft I and the intermediate transition shaft I are arranged in parallel at intervals, the connecting shaft component penetrates through the intermediate transition shaft II, the power reversing mechanism is connected with the front end of the intermediate transition shaft I, the transfer case component is arranged at the front part of the gearbox shell and penetrates through the gearbox shell, the connecting shaft component and the intermediate transition shaft II are respectively connected with the transfer case component, the main speed changing component, the auxiliary speed changing component and the crawling gear component are sequentially arranged at intervals along the axial direction of the connecting shaft component, the small bevel gear shaft is connected, The auxiliary speed change assembly is connected, the small bevel gear shaft and the auxiliary speed change assembly are respectively connected with the crawling gear assembly, and the power reversing mechanism is connected with the main speed change assembly.
2. The tractor power reversing gearbox transmission of claim 1, further comprising: the power reversing mechanism comprises a wet clutch assembly, a clutch spline sleeve, a reverse driving gear, a reverse transition shaft, a reverse transition gear I, a reverse transition gear II and a hydraulic pipeline, wherein the wet clutch assembly is connected with the front end of a middle transition shaft I through the clutch spline sleeve, the reverse transition shaft is arranged on one side of the circumference of the wet clutch assembly and is parallel to the middle transition shaft, the reverse driving gear is connected with the clutch shaft of the wet clutch assembly, the reverse transition gear I is connected with the front end of the reverse transition shaft and is meshed with the reverse driving gear, the reverse transition gear II is connected with the rear end of the reverse transition shaft and is meshed with a main transmission assembly, the hydraulic pipeline is communicated with the wet clutch assembly, and the hydraulic pipeline is laid on the inner side surface of a gearbox front cover of a gearbox shell of the gearbox and in the clutch shaft of the wet clutch assembly.
3. The tractor power reversing gearbox transmission of claim 2, further comprising: the wet clutch assembly comprises two wet clutches, namely a forward wet clutch and a reverse wet clutch, the forward wet clutch is connected with the intermediate transition shaft through a clutch spline sleeve, and the reverse driving gear is mounted on a clutch shaft of the reverse wet clutch.
4. The tractor power reversing gearbox transmission of claim 2, further comprising: the torsional damper is connected with a clutch shaft of the wet clutch assembly.
5. The tractor power reversing gearbox transmission of claim 1, further comprising: the transfer case component comprises a transfer case body, a transfer case driving gear, a transfer case transition gear and a transfer case intermediate shaft, the transfer case driven gear, the transfer case output shaft and the front-wheel drive separation sliding sleeve are arranged on the transfer case shell, the transfer case body is arranged on the transfer case shell and is internally communicated with the transfer case shell, the transfer case driving gear is arranged at the front end of the middle transition shaft II, the transfer case middle shaft is arranged at the butt joint of the transfer case body and the transfer case shell, the transfer case middle shaft is connected with the transfer case shell and is parallel to the middle transition shaft, the transfer case transition gear is connected with the transfer case middle shaft and is meshed with the transfer case driving gear, the transfer case output shaft is arranged in the transfer case shell and is parallel to the transfer case middle shaft, the transfer case driven gear is connected with the transfer case output shaft and is meshed with the transfer case transition gear, and the front-wheel drive separation sliding sleeve is sleeved on a connecting shaft assembly.
6. The tractor power reversing gearbox transmission of claim 1, further comprising: 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 middle transition shaft from the front end of the middle transition shaft along the axial direction at intervals, correspondingly, a fourth-gear driven gear, a third-gear driven gear, a second-gear driven gear and a first-gear driven gear are sequentially sleeved on the peripheral surface of the middle transition shaft II at intervals along the axial direction from the front end of the middle transition shaft II, a synchronizer is respectively arranged between the first-gear driven gear and the second-gear driven gear and between the third-gear driven gear and the fourth-gear driven gear, the two synchronizers are respectively sleeved on the middle transition shaft II, and the fourth-gear driven gear is connected with the power reversing mechanism.
7. The tractor power reversing gearbox transmission of claim 6, further comprising: 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.
8. The tractor power reversing gearbox transmission of claim 1, further comprising: the auxiliary speed change assembly comprises an auxiliary speed change output shaft, an auxiliary speed change duplex driving 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 driving gear is coaxially connected with the rear end of the middle transition shaft I, the front end of the auxiliary speed change output shaft is coaxially connected with the rear end of the middle transition shaft II, the auxiliary speed change middle low-gear driving gear and the auxiliary speed change middle high-gear driving gear are sleeved on the peripheral surface of the auxiliary speed change duplex driving gear at intervals along the axial direction of the auxiliary speed change duplex driving gear, correspondingly, the auxiliary speed change low-gear driven gear, the auxiliary speed change middle high-gear driven gear and the auxiliary speed change middle high-gear are sleeved on the peripheral surface of the auxiliary speed change output shaft at intervals along the, the small bevel gear shaft is coaxially butted with the rear end of the auxiliary variable speed output shaft.
9. The tractor power reversing gearbox transmission of claim 8, wherein: the auxiliary transmission duplex driving 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.
10. The tractor power reversing gearbox transmission of claim 1, further comprising: 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.
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| CN202021874728.4U CN212250994U (en) | 2020-09-01 | 2020-09-01 | Tractor power reversing gearbox transmission device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112032262A (en) * | 2020-09-01 | 2020-12-04 | 江苏沃得农业机械股份有限公司 | Tractor power reversing gearbox transmission device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032262A (en) * | 2020-09-01 | 2020-12-04 | 江苏沃得农业机械股份有限公司 | Tractor power reversing gearbox transmission device |
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