CN216467174U

CN216467174U - Tractor front drive axle suitable for paddy field working condition and tractor

Info

Publication number: CN216467174U
Application number: CN202122757045.1U
Authority: CN
Inventors: 王伟; 冯向梁; 贾强; 张丽媛; 吕平; 董云蓬; 张万庆; 卓超; 孙宗虎
Original assignee: Shandong Weichai Lovol Transmission Co ltd
Current assignee: Shandong Weichai Lovol Transmission Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-10
Anticipated expiration: 2031-11-11

Abstract

The utility model provides a tractor front drive axle and a tractor suitable for paddy field working conditions, wherein the tractor front drive axle comprises: the main speed reducer assembly is connected with the differential assembly, one ends of the left half shaft and the right half shaft are rotatably installed on a differential shell of the differential assembly, the differential assembly is connected with the side transmission assembly through the left half shaft and the right half shaft, the side transmission assembly is connected with the tail end transmission assembly, the vertical shaft is installed inside the tail end transmission assembly, one end of the vertical shaft is connected with a side transmission primary gear assembly of the side transmission assembly, the other end of the vertical shaft is connected with a tail end secondary transmission gear set in the transmission assembly, and the vertical shaft is installed in the tail end transmission shell of the tail end transmission assembly and the side transmission shell of the side transmission assembly through tapered roller bearings respectively.

Description

Tractor front drive axle suitable for paddy field working condition and tractor

Technical Field

The utility model relates to the technical field of tractors, in particular to a tractor front drive axle suitable for paddy field working conditions and a tractor.

Background

The front driving axle is the core part of the transmission system of the four-wheel drive type tractor, is positioned at the tail end of a power transmission system, has the functions of supporting a machine body, steering and walking, and can be used as an auxiliary driving device when the tractor works under the severe working conditions of mud, wet skid and the like, so that the passing performance of the tractor can be improved.

According to different working conditions, the tractor can be divided into a dry land tractor and a paddy field tractor, and the front drive axle of the dry land tractor and the front drive axle of the paddy field tractor have great difference in structure. The paddy field tractor needs to be soaked in slurry and other liquid environments full of impurities for operation for a long time due to poor operation working conditions, so that the requirements on the performances of sealing and the like of a front drive axle are higher.

For a long time, domestic and imported paddy field tractors are relatively common in product reliability, and particularly in a medium-high horsepower stage, the product failure rate is high, the first failure time is short, and failures such as side transmission shell breakage and vertical shaft breakage which influence the realization of the front axle function are easy to occur. Therefore, the front drive axle of the existing paddy field type tractor can not meet the use requirements of users of the paddy field type tractor at present, and particularly the use requirements of the users taking family farms and cooperative society as units for centering high-horsepower paddy field type tractors. The development of the front drive axle of the paddy field tractor is lagged, and the development process of the agricultural machinery industry in China is limited to a great extent.

At present, a front drive axle of a tractor suitable for paddy field working conditions generally adopts a central single-stage speed reduction and wheel edge speed reduction mode. A bushing supporting structure is adopted between two stages of tail end transmission of the wheel edge, and a joint surface is sealed by an oil seal.

In the existing two-stage tail end transmission, a supporting structure at a vertical shaft is supported by a bushing. In the use process of the structure, the moment acting on the vertical shaft in the direction vertical to the axis of the vertical shaft is large, and the structure is easily subjected to eccentric wear of the bushing, the shell and the oil seal due to the limitation of the material performance and the self structure of the bushing and the shell along with the lengthening of the use time. After the oil seal is abraded, impurities enter the interior of the tail end transmission assembly to further increase abrasion at the bushing, and oil leakage of the oil seal can be caused when the condition is lighter; as the service life of the whole bridge increases, further wear increases, which can result in high temperature annealing of the shell at the bushing assembly and subsequent fracture, rendering the front bridge non-functional.

Most of the existing paddy field type front drive axles in the domestic market are poor in reliability, the first failure time is short, and failures such as breakage of a tail end transmission shell and the like which seriously affect the function realization of the front axle are easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of the prior art and provides a tractor front drive axle suitable for paddy field working conditions and a tractor.

The technical scheme for solving the technical problems is as follows: a tractor front drive axle adapted for use in paddy field conditions, comprising: the main speed reducer assembly is connected with the differential assembly, one ends of the left half shaft and the right half shaft are rotatably installed on a differential shell of the differential assembly, the differential assembly is connected with the side transmission assembly through the left half shaft and the right half shaft, the side transmission assembly is connected with the tail end transmission assembly, the vertical shaft is installed inside the tail end transmission assembly, one end of the vertical shaft is connected with a side transmission primary gear assembly of the side transmission assembly, the other end of the vertical shaft is connected with a tail end secondary transmission gear set in the transmission assembly, and the vertical shaft is installed in the tail end transmission shell of the tail end transmission assembly and the side transmission shell of the side transmission assembly through tapered roller bearings respectively.

The utility model has the beneficial effects that: a tapered roller bearing supporting structure is adopted at the vertical shaft of the wheel edge of the drive axle, so that the problem of abrasion of a lining in the original structure is solved.

Further, the final drive assembly includes: the main reducer casing, the driven spiral bevel gear of owner closes piece, first tapered roller bearing, wave form cover, second tapered roller bearing, driven spiral bevel gear of owner closes piece both ends and passes through respectively first tapered roller bearing and the second tapered roller bearing is installed in the main reducer casing, the wave form cover is established the outside of driven spiral bevel gear of owner closes piece, the both ends of wave form cover correspond respectively with first tapered roller bearing and second tapered roller bearing butt, driven spiral bevel gear of owner close piece with differential mechanism assembly transmission is connected.

The beneficial effect of adopting the further scheme is that: the structural design of the main reducer assembly ensures that the main reducer assembly has compact structure and good sealing performance, is convenient for mounting and maintaining parts, and improves the stability and reliability of the main reducer assembly.

Further, the differential assembly includes: the differential comprises a planetary gear, a half axle gear, a first planetary gear shaft and a planetary gear shaft positioning pin, wherein the first planetary gear shaft is installed in the differential shell through the planetary gear shaft positioning pin, the planetary gear is installed on the first planetary gear shaft, one end of the half axle gear is correspondingly engaged with the planetary gear, and the other end of the half axle gear is rotatably installed on the differential shell and connected with a left half axle or a right half axle.

The beneficial effect of adopting the further scheme is that: the differential mechanism assembly is compact in structure and convenient for power transmission due to the structural design of the differential mechanism assembly.

Further, the differential assembly further includes: the differential mechanism comprises a planetary gear gasket and a side gear gasket, wherein the planetary gear gasket is arranged between a first planetary gear shaft and the differential mechanism shell, and the other end of the side gear is correspondingly arranged on the differential mechanism shell through the side gear gasket.

The beneficial effect of adopting the further scheme is that: the sealing performance, stability and reliability of the differential assembly are improved.

Further, the side drive assembly includes: the side drive bearing, the side drive first order gear assembly pass through gear bearing and install in the side drive casing, the other end rotation of left semi-axis and right semi-axis is installed in the side drive casing and with the side drive first order gear assembly is connected, the side drive first order gear assembly with the vertical scroll transmission is connected, the side drive bearing is installed in the side drive casing, the side drive bearing housing is established the middle part of vertical scroll, the side drive bearing is tapered roller bearing, the vertical scroll passes through the side drive bearing is installed in the side drive casing of side drive assembly.

The beneficial effect of adopting the further scheme is that: the vertical shaft support is realized through the tapered roller bearing, the steering gland is supported through the tapered roller bearing, and the left end transmission assembly, the right end transmission assembly, the steering gland and the side transmission assembly are supported through the tapered roller bearing, so that the axis of the vertical shaft in the working process is coincident with the axes of the left end transmission assembly, the right end transmission assembly, the steering gland and the side transmission assembly. The vertical shaft adopts a support structure with conical bearings at two ends, so that the faults that the function of the front drive axle is affected by bush abrasion, oil leakage of an oil seal, shell fracture and the like caused by bush abrasion in the conventional bush support structure are fundamentally avoided, the first fault time of the front drive axle is prolonged, the service life is prolonged, the reliability of the front drive axle is improved, and the service cost and the maintenance cost are reduced.

Further, the side transmission primary gear assembly comprises two bevel gears in transmission connection, and the two bevel gears are respectively in rotary connection in the side transmission shell through gear bearings; the other end of the left half shaft or the right half shaft is connected with one of the bevel gears, and one end of the vertical shaft is connected with the other bevel gear.

The beneficial effect of adopting the further scheme is that: the joint surface sealing is realized through the composite oil seal, the connection surface sealing is realized through the oil seal, and the left side tail end transmission assembly, the right side tail end transmission assembly, the steering gland and the side transmission assembly are supported through the tapered roller bearing, so that the axis of the vertical shaft is ensured to coincide with the axes of the left side tail end transmission assembly, the right side tail end transmission assembly, the steering gland and the side transmission assembly in the working process. The sealing structure for the matching surface of the side transmission shell and the tail end transmission shell is reasonable in design, and can effectively prevent impurities such as silt from entering the tail end transmission.

Further, the end drive assembly includes: the planetary gear mechanism comprises a second planetary gear shaft, a planetary gear carrier, a front driving shaft bearing, an end cover body, a front driving shaft, a tail end transmission shell and a plurality of wheel-side planetary gears, wherein the wheel-side planetary gears surround the tail end secondary transmission gear set and are meshed with the tail end secondary transmission gear set, the wheel-side planetary gears are installed on the planetary gear carrier through the second planetary gear shaft, a gear ring is arranged on the tail end transmission shell, the wheel-side planetary gears are meshed with the gear ring on the tail end transmission shell, the planetary gear carrier is connected with the front driving shaft, the front driving shaft is installed on the end cover body through the front driving shaft bearing, and the end cover body is connected with the tail end transmission shell.

The beneficial effect of adopting the further scheme is that: the final transmission adopts a planetary mechanism for speed reduction, the structure is compact, larger load can be transmitted, the working state is more stable, and the noise and vibration during high-speed operation can be obviously reduced. By adopting the modular design, the matching requirements of tractors with different power sections can be met by combining modules.

Further, the end drive assembly further comprises: the front drive shaft oil seal, the front drive shaft retaining ring, the planet carrier bearing, the first terminal gear bearing, the second terminal gear bearing and the sealing cover are arranged between the front drive shaft and the end cover body, the second terminal transmission gear set is arranged on the planet carrier through the planet carrier bearing, the planet carrier bearing and the planet carrier are arranged between the front drive shaft retaining ring, the second terminal transmission gear set is arranged on the terminal transmission shell through the first terminal gear bearing, the vertical shaft is arranged on the terminal transmission shell through the second terminal gear bearing, and the sealing cover is arranged at the free end of the terminal transmission shell.

The beneficial effect of adopting the further scheme is that: the structural design of the tail end transmission assembly is convenient for installation and maintenance of the tail end transmission assembly, and the stability and reliability of the tail end transmission assembly are improved.

Further, still include: the speed reducer assembly and the differential assembly are mounted in the central axle housing, and a left half shaft and a right half shaft are connected with the differential assembly; the end drive assembly includes: the left end transmission assembly and the right end transmission assembly are connected with one end of the side transmission assembly, and the other end of the left end transmission assembly and the right end transmission assembly is used for mounting wheels.

The beneficial effect of adopting the further scheme is that: the structural design of central axle housing, left semi-axis and right semi-axis, the power transmission of being convenient for, compact structure improves stability and reliability.

In addition, the utility model also provides a tractor which is characterized by comprising the tractor front drive axle suitable for the paddy field working condition.

Advantages of additional aspects of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a front view of a front drive axle according to an embodiment of the present invention.

Fig. 2 is a top view of a front drive axle according to an embodiment of the present invention.

FIG. 3 is a partial view of a final drive assembly provided in accordance with an embodiment of the present invention.

FIG. 4 is a partial view of a differential assembly provided in accordance with an embodiment of the present invention.

FIG. 5 is a partial view of a side drive assembly according to an embodiment of the present invention.

FIG. 6 is a partial view of an end drive assembly provided by an embodiment of the present invention.

1. A left end drive assembly; 2. a steering gland adjusting pad; 3. a steering gland; 4. a steering gland fixing bolt; 5. a side drive assembly; 6. a seal ring; 7. a left half shaft; 8. a central axle housing; 9. a central axle housing connecting bolt; 10. a central axle housing locating pin; 11. a right end drive assembly; 12. a steering cylinder assembly; 13. a cylinder shield fixing bolt; 14. an oil cylinder sheath; 15. the oil cylinder support is fixed with a bolt; 16. a second spring washer; 17. a front support assembly; 18. a front support seat seal ring; 19. a type I hexagon nut; 20. tightening the screw; 21. an oil cylinder support; 22. a cylinder shield; 23. a right half shaft; 24. i type hexagonal thin nut; 25. a limit bolt; 26. a main reducer assembly; 27. a main reducer housing; 28. a rear support base assembly; 29. a main speed reducer shell is connected with a bolt; 30. a differential assembly; 31. a driving spiral bevel gear assembly and a driven spiral bevel gear assembly; 32. a first tapered roller bearing; 33. a waveform sleeve; 34. a second tapered roller bearing; 35. an oil baffle disc; 36. locking the nut; 37. an oil seal seat ring; 38. a main reducer oil seal; 39. a socket head cap screw; 40. A first spring washer; 41. a left differential housing; 42. a planetary gear; 43. a right differential case; 44. a half shaft gear; 45. a differential positioning pin; 46. a first planet gear shaft; 47. a planet wheel shaft positioning pin; 48. a planetary gear spacer; 49. a half-shaft gear spacer; 50. a steering gland oil seal; 51. a steering gland bearing; 52. a side drive gear adjustment pad; 53. a retainer ring; 54. a side drive bearing; 55. compounding an oil seal; 56. a drive gear bearing; 57. a side drive primary gear assembly; 58. a gear bearing; 59. a side drive housing; 60. a second planet gear shaft; 61. a front drive shaft oil seal; 62. a front drive shaft retaining ring; 63. a planet carrier; 64. a front drive shaft bearing; 65. An end cover; 66. knurling a bolt; 67. a front drive shaft; 68. an end cover body fixing bolt; 69. A planet carrier bearing; 70. a terminal transmission housing; 71. a tail end secondary transmission gear set; 72. a terminal first gear bearing; 73. a distal second gear bearing; 74. a bearing block fixing screw; 75. a vertical shaft; 76. a bearing seat sealing ring; 77. a bearing seat; 78. a hub planet wheel; 79. a sealing cover; 80. And the tail end transmission assembly.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 6, an embodiment of the present invention provides a front drive axle of a tractor suitable for paddy field conditions, including: a tail end transmission assembly 80, a side transmission assembly 5, a left half shaft 7, a right half shaft 23, a main reducer assembly 26, a differential assembly 30 and a vertical shaft 75, the main speed reducer assembly 26 is connected with the differential assembly 30, one end of the left half shaft 7 and one end of the right half shaft 23 are rotatably mounted on a differential case of the differential assembly 30, the differential assembly 30 is connected with the side transmission assembly 5 through a left half shaft 7 and a right half shaft 23, the side transmission assembly 5 is connected with the tail end transmission assembly 80, the vertical shaft 75 is installed inside the tail end transmission assembly 80, one end of the vertical shaft 75 is connected with the side transmission primary gear assembly 57 of the side transmission assembly 5, the other end of the vertical shaft 75 is connected with the tail end secondary transmission gear set 71 in the transmission assembly 80, and the vertical shaft 75 is installed in the tail end transmission shell 70 of the tail end transmission assembly 80 and the side transmission shell 59 of the side transmission assembly 5 through tapered roller bearings respectively.

The steering gland bearing 51, the side drive bearing 54 and the second gear bearing 73 are all tapered roller bearings. The differential case includes: a left differential case 41 and a right differential case 43, the left differential case 41 being connected to the right differential case 43. The end drive housing 70 is provided with a ring gear.

The utility model aims to provide a front drive axle of a tractor, which has the advantages of reasonable structure, high reliability, strong bearing capacity and flexible steering and is particularly suitable for paddy field working conditions. A vertical shaft at the wheel edge of the drive axle adopts a support structure with conical bearings at two ends, and a joint surface adopts a two-stage sealing structure formed by an upper integrated oil seal and a lower sealing ring. The front drive axle has the advantages of reasonable overall structure, high reliability, superior performance, strong bearing capacity and more stable working state, fundamentally avoids the faults of bushing abrasion and a series of oil seal oil leakage, shell fracture and the like caused by bushing abrasion in the original structure, which influence the realization of the front drive axle function, and ensures the reliability of the front drive axle.

A front drive axle of a tractor suitable for paddy field working conditions is composed of a main reducer assembly 26, a central axle housing 8, a side transmission shell 59, a steering gland 3, a left side tail end transmission assembly 1, a right side tail end transmission assembly 11, a steering oil cylinder assembly 12, a front support assembly 17, a rear support assembly 28 and other transmission and connection parts.

The central axle housing 8 is internally provided with a main reducer assembly 26, a left half shaft 7 and a right half shaft 23, the main reducer assembly 26 consists of a main reducer shell 27, a driving and driven spiral bevel gear assembly 31, a first tapered roller bearing 32, a second tapered roller bearing 34, a corrugated sleeve 33, a main reducer oil seal 38, an oil baffle disc 35, a locking nut 36 and a differential assembly 30, the differential assembly 30 comprises a left differential shell 41, a right differential case 43, a side gear 44, a side gear spacer 49, a planetary gear 42, a first planetary gear shaft 46, a planetary gear spacer 48 and other adjusting and connecting parts, wherein the final drive assembly 26 is connected with the central axle case 8 through a final drive case connecting bolt 29, and the left axle shaft 7 and the right axle shaft 23 are respectively connected with one end (through a spline) with the differential 30 (i.e. the side gear 44 in the differential 30).

Two sides of the central axle housing 8 are provided with a side transmission shell 59, a side transmission primary gear assembly 57 (namely a driving gear and a driven gear), a driving gear bearing 56, a gear bearing 58, a steering gland oil seal 50, a composite oil seal 55, a side transmission gear adjusting pad 52 and a vertical shaft 75, and the other end of the vertical shaft 75 is connected with the right side end transmission assembly 11 of the left side end transmission assembly 1.

The end transmission assembly 80 is divided into a left end transmission assembly 1 and a right end transmission assembly 11, the left end transmission assembly 1 and the right end transmission assembly 11 are respectively composed of an end transmission housing 70, the left end transmission housing, the right end transmission housing, the gear ring and the cylindrical pin are combined to form an end transmission housing, a bearing seat 77, a bearing seat sealing ring 76, a bearing seat fixing screw 74, an inner hexagonal cylindrical head screw, a standard type spring washer, an end secondary transmission gear set 71 (namely an end first gear and an end second gear), a front drive shaft bearing 64, a front drive shaft retainer ring 62, a front drive shaft oil seal 61, a deep groove ball bearing, an elastic retainer ring for a hole, a sealing cover 79, a front drive shaft 67, a planet carrier 63, a second planet gear shaft 60, a wheel-side planet gear 78, an elastic retainer ring for a shaft, a composite oil seal 55, an end cover body 65, a hexagonal flange face bolt and a knurled bolt 66.

The power is input from the driving and driven spiral bevel gear assembly 31 of the main speed reducer assembly 26, after being decelerated and torque-increased by the main speed reducer assembly 26, the power is transmitted to the side transmission primary gear assembly 57 by the left half shaft 7 and the right half shaft 23 to carry out second-stage deceleration and torque-increase, then the power is transmitted to the tail end secondary transmission gear set 71 by the vertical shaft 75 to carry out third-stage deceleration and torque-increase, and finally transmitted to the wheel-side planetary speed reducing mechanism, after being decelerated and torque-increased by the planetary mechanism, the power is output by the planetary carrier 63, and the purpose of power transmission is realized through the above modes.

The steering cylinder assembly 12 is installed in the front of the central axle housing 8, the two ends of the piston rod of the steering cylinder are provided with a hinged ball head and a connecting pull rod, the other end of the connecting pull rod is hinged with the lug seat of the end transmission housing 70, when the piston rod moves, one side of the piston rod is pushed to connect the pull rod, and the other side of the piston rod is pulled, so that the left end transmission assembly 1, the knuckle of the right end transmission assembly 11 and the wheel-side reducer assembly are driven to rotate, and the function of front wheel steering is realized by replacing a steering tie rod.

The front supporting seat assembly 17 is installed on the central axle housing 8, the rear supporting seat assembly 28 is installed on the main speed reducer casing 27, and the front drive axle is fixed on the tractor bracket through the front supporting seat assembly 17 and the rear supporting seat assembly 28.

The main reducer assembly 26 is engaged with the external splines of the left differential case 41 or the right differential case 43 in the differential assembly 30 through the internal splines of the driving and driven spiral bevel gear assembly 31, one end of the left half shaft 7 and the right half shaft 23 is engaged with the internal splines of the side gear 44 in the differential assembly 30 through the external splines, and the other end is engaged with the internal splines of the middle-side transmission primary gear assembly 57 in the side transmission assembly 5 through the external splines. A differential assembly 30 is mounted in the center axle housing 8 with one end positioned by gear engagement of the final drive assembly 26 and one end positioned by a retaining ring. Final drive assembly 26 is connected to center axle housing 8 by final drive housing connecting bolts 29. The left half shaft 7 and the right half shaft 23 are in internal spline engagement with a side transmission primary gear assembly 57 in the side transmission assembly 5 through external splines. The left end transmission assembly 1 and the right end transmission assembly 11 are sleeved outside the side transmission assembly 5 from bottom to top, vertical shaft support is realized through a side transmission bearing 54, and joint surface sealing is realized through a composite oil seal 55. The upper parts of the left end transmission assembly 1 and the right end transmission assembly 11 are connected with the side transmission assembly 5 through a steering gland 3, the steering gland 3 is supported through a steering gland bearing 51, the connection surface is sealed through a steering gland oil seal 50, and the left end transmission assembly 1 and the right end transmission assembly 11 are connected with the steering gland 3 through a steering gland fixing bolt 4. The left end transmission assembly 1, the right end transmission assembly 11, the steering gland 3 and the side transmission assembly 5 are supported by a steering gland bearing 51 and a retainer ring 53, so that the central axis of the vertical shaft 75 is coincident with the axes of the left end transmission assembly, the right end transmission assembly, the steering gland and the side transmission assembly.

In the main reducer assembly 26, a driving spiral bevel gear assembly 31 and a driven spiral bevel gear assembly 31 are connected with a main reducer casing 27 through a first tapered roller bearing 32 or a second tapered roller bearing 34, the first tapered roller bearing 32 or the second tapered roller bearing 34 are positioned through a corrugated sleeve 33, and the main reducer assembly 26 is sealed through a main reducer oil seal 38 and an oil baffle disc 35 and locked through a locking nut 36.

In the differential assembly 30, two pinion gears 42 are mounted on both ends of a first pinion shaft 46, the first pinion shaft 46 is fitted to the left differential case 41 through a mounting hole, and the first pinion shaft 46 is positioned with the left differential case 41 by a pinion positioning pin 47. One ends of the two side gears 44 are meshed with the two planet gears 42, the other ends of the two side gears are assembled on a left differential case 41 or a right differential case 43 of the differential respectively, the left differential case 41 or the right differential case 43 of the differential is positioned through a differential positioning pin 45 and connected through the hexagon socket head cap screws 39, the first spring washer 40 is sleeved on the hexagon socket head cap screws 39, and the first spring washer 40 is abutted to the left differential case 41.

The side transmission primary gear assembly 57 in the side transmission assembly 5 is connected with the side transmission housing 59 through the driving gear bearing 56 and the gear bearing 58, and the bearing driving gear bearing 56 and the gear bearing 58 are in interference fit with the side transmission housing 59 and are positioned through a check ring. The steering gland bearing 51, as well as the side drive bearing 54, steering gland oil seal 50, and compound oil seal 55 are press fit over the side drive housing 59.

In the left end drive assembly 1 and the right end drive assembly 11, the bearing block 77 is connected to the end drive housing 70 by the bearing block fixing screw 74. One end of the vertical shaft 75 is meshed with an internal spline of the side transmission primary gear assembly 57 through an external spline, and the other end of the vertical shaft is meshed with an internal spline of a second gear of the tail end secondary transmission gear set 71 through an external spline. The end secondary drive gear set 71 is meshed with the three wheel-side planet gears 78 through a first gear external spline as a sun gear shaft. The three wheel-side planet wheels 78 are mounted on the planet wheel carrier 63 through the second planet gear shaft 60, and the sun gear shaft rotates to drive the three wheel-side planet wheels 78 to rotate on the gear rings of the gear ring assemblies of the tail end transmission shell and the tail end transmission shell 70, so as to drive the planet wheel carrier 63 to rotate. The planetary carrier 63 is engaged with the external spline of the front drive shaft 67 through the internal spline, and drives the front drive shaft 67 to rotate. The front drive shaft 67 is attached to the end cover 65 via a front drive shaft bearing 64, and the joint surface is sealed by a front drive shaft oil seal 61. The end cover 65 is connected to the end drive housing 70 by end cover fixing bolts 68, and the joint surface is sealed by a seal ring.

The vertical shaft adopts a support structure with conical bearings at two ends, so that the faults which can affect the function realization of the front drive axle, such as bush abrasion, oil leakage of an oil seal, shell fracture and the like caused by bush abrasion in the conventional bush support structure are fundamentally avoided, the first fault time of the front drive axle is prolonged, the service life is prolonged, the reliability of the front drive axle is improved, and the service cost and the maintenance cost are reduced; the sealing structure for the matching surface of the side transmission shell and the tail end transmission shell is reasonable in design, and can effectively prevent impurities such as silt from entering the interior of the tail end transmission; the final transmission adopts a planetary mechanism for speed reduction, the structure is compact, larger load can be transmitted, the working state is more stable, and the noise and vibration during high-speed operation can be obviously reduced; by adopting the modular design, the matching requirements of tractors with different power sections can be met by combining modules.

Alternative one: the transmission lines and the structure are the same, and only part of the size parameters of the parts are changed to form a novel steering drive axle; alternative scheme two: the transmission route and the structure are similar, and only part of the size parameters of the parts are changed to form a novel steering drive axle; alternative scheme three: the internal structures are completely the same, and the novel steering drive axle is formed only by changing the external dimension of the shell and the integral connection dimension; alternative four: the transmission lines and the structures are different, but a structure that conical bearings at two ends of a vertical shaft are used for supporting is adopted, so that a novel steering drive axle is formed.

The front drive axle assembly is suitable for paddy field and dry field tractors, in particular for paddy field tractors; the front driving axle (figure 1, figure 2) structure; the structure form of a side transmission assembly (figure 5); the structure form of the end transmission assembly 80 (figure 6); the side transmission assembly (figure 5) is combined with the end transmission assembly (figure 6); the structure of the vertical shaft support.

A steering gland adjusting pad 2 is arranged between a steering gland 3 and a left end transmission assembly 1 or a right end transmission assembly 11, the steering gland 3 is arranged on the left end transmission assembly 1 or the right end transmission assembly 11 through a steering gland fixing bolt 4, a side transmission assembly 5 is arranged on a central axle housing 8, a sealing ring 6 is arranged between the side transmission assembly 5 and the central axle housing 8, the side transmission assembly 5 is arranged on the central axle housing 8 through a central axle housing connecting bolt 9 and a central axle housing positioning pin 10, an oil cylinder support 21 is arranged on the central axle housing 8 through an oil cylinder support fixing bolt 15, an oil cylinder cover fixing bolt 13 is arranged on the central axle housing 8, an oil cylinder cover 14 is sleeved on a steering oil cylinder, the oil cylinder cover 14 is arranged on an oil cylinder support 21 through a set screw 20, a type I hexagon nut 19 is sleeved on the set screw 20, a second spring washer 16 is arranged between the type I hexagon nut 19 and the oil cylinder support 21, a front supporting seat sealing ring 18 is arranged between the front supporting seat assembly 17 and the central axle housing 8, an oil cylinder protecting cover 22 is installed on the central axle housing 8 through an oil cylinder protecting cover fixing bolt 13, the side transmission assembly 5 is connected with the left side end transmission assembly 1 or the right side end transmission assembly 11 through a limiting bolt 25, and an I-shaped hexagonal thin nut 24 is sleeved on the limiting bolt 25.

As shown in fig. 1 to 6, further, the final drive assembly 26 includes: the main speed reducer casing 27, the active and passive spiral bevel gear assembly 31, the first tapered roller bearing 32, the wave-shaped sleeve 33, the second tapered roller bearing 34, the oil baffle disc 35, the lock nut 36, the oil seal race 37, the main speed reducer oil seal 38, the active and passive spiral bevel gear assembly 31 passes through the first tapered roller bearing 32 and the second tapered roller bearing 34 is installed in the main speed reducer casing 27, the wave-shaped sleeve 33 is sleeved on the outside of the active and passive spiral bevel gear assembly 31, the two ends of the wave-shaped sleeve 33 respectively correspond to the first tapered roller bearing 32 and the second tapered roller bearing 34, the oil seal race 37 abuts against the second tapered roller bearing 34, the lock nut 36 abuts against the oil seal race 37, the main speed reducer oil seal 38 is sleeved on the outside of the oil seal race 37 and abuts against the second tapered roller bearing 34, the oil baffle disc 35 is abutted against the main speed reducer oil seal 38, and the driving and driven spiral bevel gear assembly 31 is in transmission connection with the differential assembly 30.

As shown in fig. 1 to 6, further, the differential assembly 30 includes: a left differential case 41, a pair of pinion gears 42, a right differential case 43, a pair of side gears 44, a differential positioning pin 45, a first pinion shaft 46, a pinion shaft positioning pin 47, the first pinion pins 46 are mounted in the left differential case 41 through the pinion set pins 47, a pair of the planetary gears 42 are respectively mounted on both ends of the first planetary gear shafts 46, one end of a pair of the side gears 44 is respectively engaged with the pair of the planetary gears 42, the other end of a pair of the side gears 44 is respectively mounted on the left differential case 41 and the right differential case 43, and correspondingly with left half 7 and right half 23 be connected, left differential case 41 and right differential case 43 pass through differential locating pin 45 fixes a position, left differential case 41 with right differential case 43 is connected.

As shown in fig. 1 to 6, further, the differential assembly 30 further includes: a planetary gear spacer 48 and a side gear spacer 49, the planetary gear spacer 48 is installed between the first planetary gear shaft 46 and the differential case, and the other end of the side gear 44 is correspondingly installed on the differential case through the side gear spacer 49.

The left axle shaft 7 and the right axle shaft 23 are connected to the side gears 44 provided in the differential assembly 30 on the left and right sides, respectively.

As shown in fig. 1 to 6, further, the side transmission assembly 5 includes: the side transmission assembly comprises a steering gland bearing 51, a side transmission bearing 54, a driving gear bearing 56, a side transmission first-stage gear assembly 57, a gear bearing 58 and a side transmission shell 59, wherein the side transmission first-stage gear assembly 57 is installed in the side transmission shell 59 through the driving gear bearing 56 and the gear bearing 58, the other ends of a left half shaft 7 and a right half shaft 23 are rotatably installed in the side transmission shell 59 and are connected with the side transmission first-stage gear assembly 57, the side transmission first-stage gear assembly 57 is in transmission connection with a vertical shaft 75 and the left half shaft 7 or the right half shaft 23 respectively, the steering gland bearing 51 and the side transmission bearing 54 are conical roller bearings, and the vertical shaft 75 is installed in the side transmission shell 59 of the side transmission assembly 5 through the steering gland bearing 51 and the side transmission bearing 54.

The beneficial effect of adopting the further scheme is that: the vertical shaft support is realized through the tapered roller bearing, the steering gland is supported through the tapered roller bearing, the left end transmission assembly 80, the right end transmission assembly, the steering gland and the side transmission assembly are supported through the tapered roller bearing, and the axis of the vertical shaft in the working process is enabled to coincide with the axes of the left end transmission assembly, the right end transmission assembly, the steering gland and the side transmission assembly. The vertical shaft adopts a support structure with conical bearings at two ends, so that the faults that the function of the front drive axle is affected by bush abrasion, oil leakage of an oil seal, shell fracture and the like caused by bush abrasion in the conventional bush support structure are fundamentally avoided, the first fault time of the front drive axle is prolonged, the service life is prolonged, the reliability of the front drive axle is improved, and the service cost and the maintenance cost are reduced.

The steering gland bearing 51 is installed on the top of the side transmission housing 59, the steering gland oil seal 50 is abutted against the steering gland bearing 51, and the steering gland bearing 51 is arranged adjacent to the driving gear bearing 56. The steering gland bearing 51 and the side transmission bearing 54 are both tapered roller bearings, and the side transmission bearing 54 is abutted against a bearing seat 77 and used for supporting the vertical shaft 75.

As shown in fig. 1 to 6, further, the side transmission assembly 5 further includes: turn to gland oil blanket 50, side drive gear adjustment pad 52, retaining ring 53, compound oil blanket 55, driving gear bearing 56 and gear bearing 58 installs through retaining ring 53 in the side drive casing 59, the cover is established to side drive bearing 54 the middle part of vertical scroll 75, turn to gland oil blanket 50 and compound oil blanket 55 is installed in the side drive casing 59, and with turn to gland bearing 51 butt, compound oil blanket 55 with side drive bearing 54 butt, side drive gear adjustment pad 52 is installed in the side drive casing 59, and with gear bearing 58 butt.

The beneficial effect of adopting the above further scheme is: the joint surface sealing is realized through the composite oil seal, the connection surface sealing is realized through the oil seal, and the left side tail end transmission assembly 1, the right side tail end transmission assembly, the steering gland and the side transmission assembly are supported through the tapered roller bearing, so that the axis of the vertical shaft is ensured to coincide with the axes of the left side tail end transmission assembly, the right side tail end transmission assembly, the steering gland and the side transmission assembly in the working process. The sealing structure for the matching surface of the side transmission shell and the tail end transmission shell is reasonable in design, and can effectively prevent impurities such as silt from entering the tail end transmission.

Further, the side transmission primary gear assembly 57 comprises two bevel gears 57 in transmission connection, and the two bevel gears are respectively rotatably connected in the side transmission housing 59 through gear bearings; the other end of the left half shaft 7 or the right half shaft 23 is connected with one of the bevel gears, and one end of the vertical shaft 75 is connected with the other bevel gear.

Wherein, the bevel gear connected with the left half shaft 7 or the right half shaft 23 is horizontally arranged, the bevel gear connected with the vertical shaft 75 is obliquely arranged, and the two bevel gears are meshed.

As shown in fig. 1 to 6, further, the end transmission assembly 80 includes: a second planet gear shaft 60, a planet gear carrier 63, a front drive shaft bearing 64, an end cover 65, a front drive shaft 67, a tail end transmission housing 70, a tail end secondary transmission gear set 71, a bearing seat 77 and a plurality of wheel-side planet gears 78, wherein the bearing seat 77 is arranged on the tail end transmission housing 70, the vertical shaft 75 is in transmission connection with the tail end secondary transmission gear set 71, the wheel-side planet gears 78 are arranged around the tail end secondary transmission gear set 71 and are meshed with the tail end secondary transmission gear set 71, the wheel-side planet gears 78 are arranged on the planet gear carrier 63 through the second planet gear shaft 60, the tail end transmission housing 70 is provided with a gear ring, the wheel-side planet gears 78 are meshed with the gear ring on the tail end transmission housing 70, the planet gear carrier 63 is meshed with the front drive shaft 67, the front drive shaft 67 is arranged on the end cover 65 through the front drive shaft bearing 64, the end cover 65 is connected to the tip end transmission housing 70.

The number of the hub planet wheels 78 may be three. The middle part of the front driving shaft 67 is provided with a connecting shaft, the outer side of the connecting shaft is provided with an outer gear ring, and the planet carrier 63 is engaged with the outer gear ring of the connecting shaft through the inner gear ring.

As shown in fig. 1 to 6, further, the end transmission assembly 80 further includes: the front drive shaft oil seal 61, the front drive shaft retainer ring 62, the end cover fixing bolt 68, the planet carrier bearing 69, the terminal first gear bearing 72, the terminal second gear bearing 73, the bearing seat fixing bolt 74, the bearing seat sealing ring 76 and the sealing cover 79, wherein the bearing seat 77 is connected with the terminal transmission housing 70 through the bearing seat fixing bolt 74, the front drive shaft oil seal 61 is installed between the front drive shaft 67 and the end cover 65, the end cover 65 is connected with the terminal transmission housing 70 through the end cover fixing bolt 68, the terminal secondary transmission gear set 71 is installed on the planet carrier 63 through the planet carrier bearing 69, the front drive shaft retainer ring 62 is installed between the planet carrier bearing 69 and the planet carrier 63, the end cover 65 is provided with a plurality of knurled bolts 66, and the terminal secondary transmission gear set 71 is installed on the terminal transmission housing through the terminal first gear bearing 72 70, the vertical shaft 75 is mounted on the end drive housing 70 through the end second gear bearing 73, the bearing seat 77 is mounted on the end drive housing 70 through the bearing seat seal 76, and the seal 79 is mounted on the free end of the end drive housing 70.

As shown in fig. 1 to 6, further, the method further includes: central axle case 8, left semi-axis 7 and right semi-axis 23, reduction gear assembly 26 differential assembly 30, left semi-axis 7 and right semi-axis 23 are installed in central axle case 8, left semi-axis 7 and right semi-axis 23 rotate to be installed differential assembly 30, the end transmission assembly includes: the left end transmission assembly 1 and the right end transmission assembly 11, one end of the left end transmission assembly 1 and one end of the right end transmission assembly 11 are both connected with the side transmission assembly 5, and the other end is used for mounting wheels.

As shown in fig. 1 to 6, the center axle housing 8 is further provided with a front support seat assembly 17.

The beneficial effect of adopting the further scheme is that: the front supporting seat assembly is convenient for the front driving axle to be connected with the tractor.

In addition, the embodiment of the utility model also provides a tractor, which comprises the tractor front drive axle suitable for the paddy field working condition.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a tractor front drive axle suitable for paddy field operating mode which characterized in that includes: the differential mechanism comprises a tail end transmission assembly (80), a side transmission assembly (5), a left half shaft (7), a right half shaft (23), a main speed reducer assembly (26), a differential assembly (30) and a vertical shaft (75), wherein the main speed reducer assembly (26) is connected with the differential assembly (30), one ends of the left half shaft (7) and the right half shaft (23) are rotatably arranged on a differential shell of the differential assembly (30), the differential assembly (30) is connected with the side transmission assembly (5) through the left half shaft (7) and the right half shaft (23), the side transmission assembly (5) is connected with the tail end transmission assembly (80), the vertical shaft (75) is arranged inside the tail end transmission assembly (80), one end of the vertical shaft (75) is connected with a side transmission primary gear assembly (57) of the side transmission assembly (5), the other end of the vertical shaft (75) is connected with a tail end secondary transmission gear set (71) in the tail end transmission assembly (80), the vertical shaft (75) is respectively installed in a tail end transmission housing (70) of a tail end transmission assembly (80) and a side transmission housing (59) of a side transmission assembly (5) through tapered roller bearings.

2. The tractor front drive axle adapted for paddy field conditions of claim 1, characterized in that the final drive assembly (26) comprises: main reducer casing (27), the driven spiral bevel gear of owner closes piece (31), first tapered roller bearing (32), wave form cover (33), second tapered roller bearing (34), driven spiral bevel gear of owner closes piece (31) both ends and passes through respectively first tapered roller bearing (32) and second tapered roller bearing (34) are installed in main reducer casing (27), wave form cover (33) cover is established the outside of driven spiral bevel gear of owner closes piece (31), the both ends of wave form cover (33) correspond respectively with first tapered roller bearing (32) and second tapered roller bearing (34) butt, driven spiral bevel gear of owner close piece (31) with differential mechanism assembly (30) transmission is connected.

3. The tractor front drive axle adapted for paddy field conditions of claim 1, characterized in that the differential assembly (30) comprises: the differential comprises a planetary gear (42), a side gear (44), a first planetary gear shaft (46) and a planetary gear shaft positioning pin (47), wherein the first planetary gear shaft (46) is installed in the differential shell through the planetary gear shaft positioning pin (47), the planetary gear (42) is installed on the first planetary gear shaft (46), one end of the side gear (44) is correspondingly meshed with the planetary gear (42), the other end of the side gear (44) is rotatably installed on the differential shell and is connected with a left half shaft (7) or a right half shaft (23).

4. The tractor front drive axle adapted for paddy field conditions of claim 3, characterized in that the differential assembly (30) further comprises: the differential gear comprises a planetary gear gasket (48) and a side gear gasket (49), wherein the planetary gear gasket (48) is installed between the first planetary gear shaft (46) and the differential case, and the other end of the side gear (44) is correspondingly installed on the differential case through the side gear gasket (49).

5. A tractor front axle adapted for paddy field conditions according to claim 1, characterized in that the side transmission assembly (5) comprises: the side transmission device comprises a side transmission bearing (54), a side transmission primary gear assembly (57) is installed in a side transmission shell (59) through a gear bearing, the other ends of a left half shaft (7) and a right half shaft (23) are rotatably installed in the side transmission shell (59) and are connected with the side transmission primary gear assembly, the side transmission primary gear assembly (57) is in transmission connection with a vertical shaft (75), the side transmission bearing (54) is installed in the side transmission shell (59), the side transmission bearing (54) is sleeved in the middle of the vertical shaft (75), the side transmission bearing (54) is a tapered roller bearing, and the vertical shaft (75) is installed in the side transmission shell (59) of a side transmission assembly (5) through the side transmission bearing (54).

6. The front drive axle of the tractor suitable for the paddy field condition is characterized in that the side transmission primary gear assembly (57) comprises two bevel gears in transmission connection, and the two bevel gears are respectively and rotatably connected in the side transmission shell (59) through gear bearings; the other end of the left half shaft (7) or the right half shaft (23) is connected with one of the bevel gears, and one end of the vertical shaft (75) is connected with the other bevel gear.

7. The tractor front drive axle adapted for paddy field conditions of claim 1, characterized in that the end drive assembly (80) comprises: a second planet gear shaft (60), a planet gear carrier (63), a front drive shaft bearing (64), an end cover body (65), a front drive shaft (67), a tail end transmission shell body (70), and a plurality of wheel-side planet gears (78), wherein the wheel-side planet gears (78) are arranged around the tail end secondary transmission gear set (71) and are meshed with the tail end secondary transmission gear set (71), the wheel-side planet wheels (78) are arranged on the planet wheel carrier (63) through the second planet gear shaft (60), a gear ring is arranged on the tail end transmission shell (70), a plurality of wheel-side planet wheels (78) are meshed with the gear ring on the tail end transmission shell (70), the planet carrier (63) is connected with the front driving shaft (67), the front driving shaft (67) is installed on the end cover body (65) through the front driving shaft bearing (64), the end cover (65) is connected to the end drive housing (70).

8. The tractor front drive axle adapted for paddy field conditions of claim 7, characterized in that the end drive assembly (80) further comprises: a front drive shaft oil seal (61), a front drive shaft retainer ring (62), a planet carrier bearing (69), a tail end first gear bearing (72), a tail end second gear bearing (73) and a sealing cover (79), the front drive shaft oil seal (61) is arranged between the front drive shaft (67) and the end cover body (65), the tail end secondary transmission gear set (71) is arranged on the planet carrier (63) through the planet carrier bearing (69), the front driving shaft retainer ring (62) is arranged between the planet carrier bearing (69) and the planet carrier (63), the end secondary drive gear set (71) is mounted on the end drive housing (70) by the end first gear bearing (72), the vertical shaft (75) is mounted on the end transmission housing (70) through the end second gear bearing (73), the seal (79) is mounted to the free end of the end drive housing (70).

9. The tractor front drive axle suitable for paddy field conditions of claim 1, further comprising: the central axle housing (8), the speed reducer assembly (26) and the differential assembly (30) are installed in the central axle housing (8), and the left half shaft (7) and the right half shaft (23) are connected with the differential assembly (30); the end drive assembly (80) includes: the left end transmission assembly (1) and the right end transmission assembly (11), one end of the left end transmission assembly (1) and one end of the right end transmission assembly (11) are both connected with the side transmission assembly (5), and the other end of the left end transmission assembly is used for mounting wheels.

10. A tractor comprising a tractor front drive axle according to any one of claims 1 to 9 adapted for use in paddy field conditions.