WO2022257188A1 - Tractor transmission - Google Patents

Tractor transmission Download PDF

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Publication number
WO2022257188A1
WO2022257188A1 PCT/CN2021/101820 CN2021101820W WO2022257188A1 WO 2022257188 A1 WO2022257188 A1 WO 2022257188A1 CN 2021101820 W CN2021101820 W CN 2021101820W WO 2022257188 A1 WO2022257188 A1 WO 2022257188A1
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WIPO (PCT)
Prior art keywords
gear
shaft
output
gear shaft
reduction mechanism
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PCT/CN2021/101820
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French (fr)
Chinese (zh)
Inventor
王文亮
胡黎明
陶亮锦
Original Assignee
温岭市明华齿轮有限公司
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Application filed by 温岭市明华齿轮有限公司 filed Critical 温岭市明华齿轮有限公司
Publication of WO2022257188A1 publication Critical patent/WO2022257188A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H47/00Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/02Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
    • F16H47/04Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion

Definitions

  • the invention belongs to the technical field of agricultural tractors, in particular to a tractor gearbox.
  • the purpose of the present invention is to provide a tractor gearbox, which realizes interval stepless speed change through the combination of mechanical transmission, hydraulic drive and planetary reduction mechanism, which not only has the high efficiency of mechanical transmission, but also has hydraulic stepless speed change.
  • a tractor gearbox comprising a housing, the housing is rotationally connected with an input bevel gear shaft, a shaft, an intermediate gear shaft and an output gear shaft, the input bevel gear shaft is linked with a shaft through a spline sleeve, and the first shaft passes through
  • the meshing gear is meshed with the ring gear of the planetary reduction mechanism
  • the input bevel gear shaft is meshed with the HMT input bevel gear through the transmission input bevel gear
  • the HMT output bevel gear is connected with the sun gear of the planetary reduction mechanism.
  • the planet carrier of the mechanism is equipped with an output gear
  • the intermediate gear shaft is equipped with an input gear that meshes with the output gear.
  • the intermediate gear shaft and the output gear shaft are connected through a transmission gear set, and the output gear shaft is provided with a planetary reduction gear.
  • the mechanism is connected with the engagement tooth sleeve, and the axial movement of the engagement tooth sleeve can be engaged with the output gear shaft or the planet carrier of the planetary reduction mechanism.
  • the planetary reduction mechanism includes a ring gear 1, a sun gear shaft, a sun gear 1 arranged on the sun gear shaft, and a sun gear 1 arranged between the sun gear 1 and the ring gear 1 and Rotate the planetary gear 1 connected to the planetary carrier 1, and the input end of the central gear shaft is equipped with a transmission output bevel gear meshed with the HMT output bevel gear.
  • the planetary reduction mechanism includes the second sun gear arranged on the output gear shaft, the second ring gear arranged on the housing, and the second sun gear arranged between the second sun gear and the second ring gear. And rotate the planetary gear 2 that is connected on the planetary carrier 2, and the described engaging gear sleeve can be combined with the sun gear 2 or the planetary carrier 2.
  • the gear set includes a first-speed driving gear and a first-speed passive gear, a second-speed driving gear and a second-speed passive gear, a third-speed driving gear and a third-speed passive gear , the driving gear of fourth gear and the passive gear of fourth gear, the driving gear of second gear, the driving gear of third gear and the driving gear of fourth gear are all set on the intermediate gear shaft, the passive gear of first gear, the passive gear of second gear and the passive gear of third gear are all set on the On the output gear shaft, there is an integrated structure between the first gear driving gear and the intermediate gear shaft, and between the fourth gear passive gear and the output gear shaft.
  • the intermediate gear shaft can be connected with the third gear driving gear or the fourth gear shaft through the third and fourth gear synchronizers.
  • the driving gear is combined, and the output gear shaft can be combined with the first gear driven gear or the second gear driven gear through the first and second gear synchronizers.
  • the housing includes a front housing and a rear case, the input bevel gear shaft, the first shaft, and the planetary reduction mechanism are all arranged on the front housing, and the intermediate gear The shaft, the output gear shaft, the gear set and the planetary reduction mechanism are all arranged on the rear case.
  • the present invention adopts the parallel combination of mechanical transmission, hydraulic transmission and planetary deceleration mechanism, so that it has the advantages of high efficiency of mechanical transmission and comfortable shifting of stepless speed change of hydraulic transmission, and is an upgraded product of the current mechanical transmission;
  • the present invention adopts the high efficiency of mechanical power transmission and the infinitely variable speed of hydraulic transmission to form a multi-interval infinitely variable speed assembly, so that each gear interval can realize the maximum speed from 0 speed to the corresponding gear, and the driving of the tractor
  • the speed can be adjusted between 0-50 km/h, which meets the speed requirements of various operations on the tractor, greatly improves the performance of the product, and greatly improves the applicability of the whole machine.
  • Fig. 1 is the overall structure diagram of the present invention.
  • a tractor gearbox comprising a housing, in which an input bevel gear shaft 1, a first shaft 2, an intermediate gear shaft 3 and an output gear shaft 4 are rotatably connected, and the input bevel gear shaft 1 is connected to a spline sleeve 5 through a
  • the shaft 2 is linked, the first shaft 2 is meshed with the ring gear 13 of the planetary reduction mechanism through the meshing gear 6, the input bevel gear shaft 1 is meshed with the HMT input bevel gear 8 through the transmission input bevel gear 7, and the HMT output bevel gear 9 is meshed with the HMT
  • the sun gear 15 of the planetary reduction mechanism is connected in transmission, the planet carrier 16 of the planetary reduction mechanism is equipped with an output gear 10, the intermediate gear shaft 3 is equipped with an input gear 11 meshing with the output gear 10, the intermediate gear shaft 3 and The output gear shafts 4 are connected through a transmission gear set.
  • the output gear shaft 4 is provided with a planetary reduction mechanism and an engaging gear sleeve 12, and the engaging gear sleeve 12 can move axially with the output gear shaft 4 or the planet carrier of the planetary reduction mechanism.
  • Two 21 are joined together.
  • the HMT input bevel gear 8 and the HMT output bevel gear 9 serve as the input and output ends of the HST hydraulic system in the prior art; meanwhile, the above-mentioned meshing teeth 6 are directly set on the outer peripheral wall of the shaft 2 .
  • the power output by the engine is divided into two transmission routes at the input bevel gear shaft 1.
  • One axis 2 is transmitted to the ring gear 13 of the planetary reduction mechanism, and the other is transmitted to the gear wheel by the HMT output bevel gear 9 through the HST hydraulic system after the transmission input bevel gear 7 meshes with the HMT input bevel gear 8 to drive and reversing.
  • the two transmission lines are combined in the planetary reduction mechanism and then output to the intermediate gear shaft 3, the gear set and the output gear shaft 4 in sequence. Cooperate to achieve high and low gear switching.
  • the present invention adopts the high efficiency of mechanical power transmission and the infinitely variable speed of hydraulic transmission to form a multi-interval infinitely variable speed assembly, so that each gear interval can realize the maximum speed from 0 speed to the corresponding gear, and the driving speed of the tractor It can be adjusted between 0-50 km/h to meet the speed requirements of various operations on the tractor, greatly improve the performance of the product, and greatly improve the applicability of the whole machine.
  • the specific setting structure of the planetary reduction mechanism is: the planetary reduction mechanism includes a ring gear 13, a central gear shaft 14, The sun gear one 15 that is arranged on the sun gear shaft 14, and the planetary gear one 17 that is arranged between the sun gear one 15 and the ring gear one 13 and is rotatably connected on the planet carrier one 16, the input end of the sun gear shaft 14 is sleeved There is a transmission output bevel gear 18 meshing with the HMT output bevel gear 9 .
  • the specific setting of the planetary reduction mechanism includes a sun gear 19 arranged on the output gear shaft 4, a ring gear 20 arranged on the housing, and a sun gear 2 19 and a ring gear 20 arranged between the second sun gear 19 and the ring gear 20 to rotate
  • the second planetary gear 22 connected to the second planetary carrier 21 , the engaging tooth sleeve 12 can be combined with the second sun gear 19 or the second planetary carrier 21 .
  • this product is equipped with four speed gears, that is, the specific setting structure of the gear set is as follows:
  • the gear set includes a first gear driving gear 23 and a first gear passive gear that are meshed.
  • the fourth gear driving gear 29 is all set on the intermediate gear shaft 3
  • the first gear driven gear 24, the second gear driven gear 26 and the third gear driven gear 28 are all sleeved on the output gear shaft 4
  • the first gear driving gear 23 and the intermediate gear shaft 3 between the fourth-speed passive gear 30 and the output gear shaft 4 are all integral structures, that is, the tooth surface of the first-speed driving gear 23 is directly set on the outer peripheral wall surface of the intermediate gear shaft 3, and the tooth surface of the fourth-speed passive gear 30
  • the surface is directly set on the outer peripheral wall of the output gear shaft 4; the intermediate gear shaft 3 can be combined with the third gear driving
  • the housing includes a front housing 33 and a rear case 34.
  • the input bevel gear shaft 1, the first shaft 2 and the planetary reduction mechanism are all arranged on the front housing 33.
  • the output gear shaft 4 , the gear set and the planetary reduction mechanism are all arranged on the rear case 34 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

A tractor transmission, comprising a housing. An input bevel gear shaft, a shaft, a middle gear shaft, and an output gear shaft are connected in the housing; the input bevel gear shaft is linked with the shaft by means of a spline housing; the shaft is in engagement transmission with a first gear ring of an epicyclic speed reduction mechanism by means of an engagement tooth; the input bevel gear shaft is in engagement transmission with an HMT input bevel gear; an HMT output bevel gear is transmittingly connected to a first sun gear of the epicyclic speed reduction mechanism; an output gear is sleeved on a first planet carrier of the epicyclic speed reduction mechanism; an input gear is sleeved on the middle gear shaft; the middle gear shaft is transmittingly connected to the output gear shaft; and the output gear shaft is provided with a planetary speed reduction mechanism and an engaging tooth sleeve. By using a parallel combination of mechanical transmission, hydraulic transmission, and the epicyclic speed reduction mechanism, the tractor transmission has the advantage of high efficiency of mechanical transmission and the shifting comfort brought by continuously variable transmission of the hydraulic transmission, such that the applicability of the whole machine is greatly improved.

Description

一种拖拉机变速箱A tractor gearbox 技术领域:Technical field:
本发明属于农业拖拉机技术领域,特指一种拖拉机变速箱。The invention belongs to the technical field of agricultural tractors, in particular to a tractor gearbox.
背景技术:Background technique:
随着我国农业机械水平的不断发展,拖拉机作为重要的农业生产机械,其在农业作业中的需求也越来越多。目前,我国大马力拖拉机驱动桥箱普遍为机械有级换挡,换挡过程完全由驾驶员承担,速度只能阶跃式变化,且在换挡时有颠簸感,不易实现变速箱与发动机的最佳燃油经济性或动力性匹配,浪费能源,因而存在着操作效率低、劳动强度大、动力性差等问题,With the continuous development of my country's agricultural machinery level, tractors, as important agricultural production machinery, have more and more demands in agricultural operations. At present, the drive axle boxes of high-horsepower tractors in my country are generally mechanically shifted in steps. The shifting process is completely borne by the driver. The best fuel economy or power matching wastes energy, so there are problems such as low operating efficiency, high labor intensity, and poor power.
发明内容:Invention content:
本发明的目的是提供一种拖拉机变速箱,其通过机械传动、液压传动以及游星减速机构的组合,实现区间无极变速,既具有了机械传动的高效率,又具有液压的无极变速。The purpose of the present invention is to provide a tractor gearbox, which realizes interval stepless speed change through the combination of mechanical transmission, hydraulic drive and planetary reduction mechanism, which not only has the high efficiency of mechanical transmission, but also has hydraulic stepless speed change.
本发明是这样实现的:The present invention is achieved like this:
一种拖拉机变速箱,包括有壳体,所述壳体内转动连接有输入锥齿轮轴、一轴、中间齿轮轴以及输出齿轮轴,输入锥齿轮轴通过花键套与一轴联动,一轴通过啮合齿与游星减速机构的齿圈一啮合传动,输入锥齿轮轴通过传动输入锥齿轮与HMT输入锥齿轮啮合传动,HMT输出锥齿轮与游星减速机构的太阳轮一传动连接,游星减速机构的行星架一上套装有输出齿轮,中间齿轮轴上套装有与输出齿轮啮合的输入齿轮,中间齿轮轴与输出齿轮轴之间通过挡位齿轮组传动连接,输出齿轮轴上设置有行星减速机构与接合齿套,接合齿套轴向移动能与输出齿轮轴或行星减速机构的行星架二相接合。A tractor gearbox, comprising a housing, the housing is rotationally connected with an input bevel gear shaft, a shaft, an intermediate gear shaft and an output gear shaft, the input bevel gear shaft is linked with a shaft through a spline sleeve, and the first shaft passes through The meshing gear is meshed with the ring gear of the planetary reduction mechanism, the input bevel gear shaft is meshed with the HMT input bevel gear through the transmission input bevel gear, and the HMT output bevel gear is connected with the sun gear of the planetary reduction mechanism. The planet carrier of the mechanism is equipped with an output gear, and the intermediate gear shaft is equipped with an input gear that meshes with the output gear. The intermediate gear shaft and the output gear shaft are connected through a transmission gear set, and the output gear shaft is provided with a planetary reduction gear. The mechanism is connected with the engagement tooth sleeve, and the axial movement of the engagement tooth sleeve can be engaged with the output gear shaft or the planet carrier of the planetary reduction mechanism.
根据上述的一种拖拉机变速箱中,所述游星减速机构包括有齿圈一、中心齿轮轴、设置在中心齿轮轴上的太阳轮一、以及设置在太阳轮一与齿圈一之间并转动连接在行星架一上的行星齿轮一,中心齿轮轴的输入端套装有与HMT输出锥齿轮相啮合的传动输出锥齿轮。According to the above-mentioned tractor gearbox, the planetary reduction mechanism includes a ring gear 1, a sun gear shaft, a sun gear 1 arranged on the sun gear shaft, and a sun gear 1 arranged between the sun gear 1 and the ring gear 1 and Rotate the planetary gear 1 connected to the planetary carrier 1, and the input end of the central gear shaft is equipped with a transmission output bevel gear meshed with the HMT output bevel gear.
根据上述的一种拖拉机变速箱中,所述行星减速机构包括有设置在输出齿轮轴上的太阳轮二、设置在壳体上的齿圈二、以及设置在太阳轮二与齿圈二之间并转动连接在行星架二上的行星齿轮二,所述接合齿套能与太阳轮二或行星架二相结合。According to the above tractor gearbox, the planetary reduction mechanism includes the second sun gear arranged on the output gear shaft, the second ring gear arranged on the housing, and the second sun gear arranged between the second sun gear and the second ring gear. And rotate the planetary gear 2 that is connected on the planetary carrier 2, and the described engaging gear sleeve can be combined with the sun gear 2 or the planetary carrier 2.
根据上述的一种拖拉机变速箱中,所述挡位齿轮组包括有相啮合的一挡主动齿轮与一挡被动齿轮、二挡主动齿轮与二挡被动齿轮、三挡主动齿轮与三挡被动齿轮、四挡主动齿轮与四挡被动齿轮,二挡主动齿轮、三挡主动齿轮以及四挡主动齿轮均套装在中间齿轮轴上,一挡被动齿轮、二挡被动齿轮以及三挡被动齿轮均套装在输出齿轮轴上,一挡主动齿轮与中间齿轮轴之间、四挡被动齿轮与输出齿轮轴之间均为一体式结构,中间齿轮轴通过三四挡同步器能与三挡主动齿轮或四挡主动齿轮相结合,输出齿轮轴通过一二挡同步器能与一挡被动齿轮或二挡被动齿轮相结合。According to the aforementioned tractor gearbox, the gear set includes a first-speed driving gear and a first-speed passive gear, a second-speed driving gear and a second-speed passive gear, a third-speed driving gear and a third-speed passive gear , the driving gear of fourth gear and the passive gear of fourth gear, the driving gear of second gear, the driving gear of third gear and the driving gear of fourth gear are all set on the intermediate gear shaft, the passive gear of first gear, the passive gear of second gear and the passive gear of third gear are all set on the On the output gear shaft, there is an integrated structure between the first gear driving gear and the intermediate gear shaft, and between the fourth gear passive gear and the output gear shaft. The intermediate gear shaft can be connected with the third gear driving gear or the fourth gear shaft through the third and fourth gear synchronizers. The driving gear is combined, and the output gear shaft can be combined with the first gear driven gear or the second gear driven gear through the first and second gear synchronizers.
根据上述的一种拖拉机变速箱中,所述壳体包括有前壳体与后箱体,所述输入锥齿轮轴、一轴、游星减速机构均设置在前壳体上,所述中间齿轮轴、输出齿轮轴、挡位齿轮组以及行星减速机构均设置在后箱体上。According to the above-mentioned tractor gearbox, the housing includes a front housing and a rear case, the input bevel gear shaft, the first shaft, and the planetary reduction mechanism are all arranged on the front housing, and the intermediate gear The shaft, the output gear shaft, the gear set and the planetary reduction mechanism are all arranged on the rear case.
本发明相比现有技术突出的优点是:The outstanding advantages of the present invention compared with prior art are:
1、本发明采用机械传动、液压传动以及游星减速机构的并联组合,使得其具备了机械传动的高效率优势和液压传动的无极变速的换挡舒适型,是目前机 械变速箱的升级产品;1. The present invention adopts the parallel combination of mechanical transmission, hydraulic transmission and planetary deceleration mechanism, so that it has the advantages of high efficiency of mechanical transmission and comfortable shifting of stepless speed change of hydraulic transmission, and is an upgraded product of the current mechanical transmission;
2、本发明采用机械传功的高效率与液压传递的无极变速,形成了多区间无极变速总成,使得各挡位区间都可以实现从0速度到相应挡位的最大速度,并且拖拉机的行驶速度能够在0-50公里/小时之间调整,满足各种作业对拖拉机速度的要求,大大提高产品的性能,使整机在适用性方面得到较大改善。2. The present invention adopts the high efficiency of mechanical power transmission and the infinitely variable speed of hydraulic transmission to form a multi-interval infinitely variable speed assembly, so that each gear interval can realize the maximum speed from 0 speed to the corresponding gear, and the driving of the tractor The speed can be adjusted between 0-50 km/h, which meets the speed requirements of various operations on the tractor, greatly improves the performance of the product, and greatly improves the applicability of the whole machine.
附图说明:Description of drawings:
图1是本发明的整体结构图。Fig. 1 is the overall structure diagram of the present invention.
图中:1、输入锥齿轮轴;2、一轴;3、中间齿轮轴;4、输出齿轮轴;5、花键套;6、啮合齿;7、传动输入锥齿轮;8、HMT输入锥齿轮;9、HMT输出锥齿轮;10、输出齿轮;11、输入齿轮;12、接合齿套;13、齿圈一;14、中心齿轮轴;15、太阳轮一;16、行星架一;17、行星齿轮一;18、传动输出锥齿轮;19、太阳轮二;20、齿圈二;21、行星架二;22、行星齿轮二;23、一挡主动齿轮;24、一挡被动齿轮;25、二挡主动齿轮;26、二挡被动齿轮;27、三挡主动齿轮;28、三挡被动齿轮;29、四挡主动齿轮;30、四挡被动齿轮;31、一二挡同步器;32、三四挡同步器;33、前壳体;34、后箱体。In the figure: 1. Input bevel gear shaft; 2. Primary shaft; 3. Intermediate gear shaft; 4. Output gear shaft; 5. Spline sleeve; 6. Meshing teeth; 7. Transmission input bevel gear; 8. HMT input cone Gear; 9, HMT output bevel gear; 10, output gear; 11, input gear; 12, engagement gear sleeve; 13, ring gear one; 14, central gear shaft; 15, sun gear one; 16, planet carrier one; 17 1, planetary gear 1; 18, transmission output bevel gear; 19, sun gear 2; 20, ring gear 2; 21, planetary carrier 2; 22, planetary gear 2; 23, first gear driving gear; 24, first gear passive gear; 25. Second gear driving gear; 26. Second gear passive gear; 27. Third gear driving gear; 28. Third gear passive gear; 29. Fourth gear driving gear; 30. Fourth gear passive gear; 31. First and second gear synchronizers; 32. Synchronizer for third and fourth gears; 33. Front housing; 34. Rear box.
具体实施方式:Detailed ways:
下面以具体实施例对本发明作进一步描述,参见图1:The present invention will be further described below with specific embodiment, referring to Fig. 1:
一种拖拉机变速箱,包括有壳体,所述壳体内转动连接有输入锥齿轮轴1、一轴2、中间齿轮轴3以及输出齿轮轴4,输入锥齿轮轴1通过花键套5与一轴2联动,一轴2通过啮合齿6与游星减速机构的齿圈一13啮合传动,输入锥齿轮轴1通过传动输入锥齿轮7与HMT输入锥齿轮8啮合传动,HMT输出锥齿轮9与游星减速机构的太阳轮一15传动连接,游星减速机构的行星架一16上套装有输出齿轮10,中间齿轮轴3上套装有与输出齿轮10啮合的输入齿轮11,中间齿轮轴3与输出齿轮轴4之间通过挡位齿轮组传动连接,输出齿轮轴4上 设置有行星减速机构与接合齿套12,接合齿套12轴向移动能与输出齿轮轴4或行星减速机构的行星架二21相接合。其中,HMT输入锥齿轮8与HMT输出锥齿轮9作为现有技术中的HST液压系统的输入端与输出端;同时,上述的啮合齿6直接开设在一轴2的外周壁面上。A tractor gearbox, comprising a housing, in which an input bevel gear shaft 1, a first shaft 2, an intermediate gear shaft 3 and an output gear shaft 4 are rotatably connected, and the input bevel gear shaft 1 is connected to a spline sleeve 5 through a The shaft 2 is linked, the first shaft 2 is meshed with the ring gear 13 of the planetary reduction mechanism through the meshing gear 6, the input bevel gear shaft 1 is meshed with the HMT input bevel gear 8 through the transmission input bevel gear 7, and the HMT output bevel gear 9 is meshed with the HMT The sun gear 15 of the planetary reduction mechanism is connected in transmission, the planet carrier 16 of the planetary reduction mechanism is equipped with an output gear 10, the intermediate gear shaft 3 is equipped with an input gear 11 meshing with the output gear 10, the intermediate gear shaft 3 and The output gear shafts 4 are connected through a transmission gear set. The output gear shaft 4 is provided with a planetary reduction mechanism and an engaging gear sleeve 12, and the engaging gear sleeve 12 can move axially with the output gear shaft 4 or the planet carrier of the planetary reduction mechanism. Two 21 are joined together. Among them, the HMT input bevel gear 8 and the HMT output bevel gear 9 serve as the input and output ends of the HST hydraulic system in the prior art; meanwhile, the above-mentioned meshing teeth 6 are directly set on the outer peripheral wall of the shaft 2 .
本发明通过机械传动、液压传动以及游星减速机构的组合,使得发动机输出的动力在输入锥齿轮轴1处分成两路传动路线,一路是通过花键套5传递给一轴2中、并由一轴2传递给游星减速机构的齿圈一13上,另外一路是借助传动输入锥齿轮7与HMT输入锥齿轮8啮合传动换向后、通过HST液压系统并由HMT输出锥齿轮9传递给游星减速机构的太阳轮一15上。从而,两路传动路线在游星减速机构中合并后依次输出给中间齿轮轴3、挡位齿轮组以及输出齿轮轴4上,同时,借助接合齿套12与输出齿轮轴4以及行星减速机构的配合、以达到高低挡位的切换。即本发明采用机械传功的高效率与液压传递的无极变速,形成了多区间无极变速总成,使得各挡位区间都可以实现从0速度到相应挡位的最大速度,并且拖拉机的行驶速度能够在0-50公里/小时之间调整,满足各种作业对拖拉机速度的要求,大大提高产品的性能,使整机在适用性方面得到较大改善。In the present invention, through the combination of mechanical transmission, hydraulic transmission and planetary reduction mechanism, the power output by the engine is divided into two transmission routes at the input bevel gear shaft 1. One axis 2 is transmitted to the ring gear 13 of the planetary reduction mechanism, and the other is transmitted to the gear wheel by the HMT output bevel gear 9 through the HST hydraulic system after the transmission input bevel gear 7 meshes with the HMT input bevel gear 8 to drive and reversing. On the sun wheel one 15 of planetary reduction mechanism. Thus, the two transmission lines are combined in the planetary reduction mechanism and then output to the intermediate gear shaft 3, the gear set and the output gear shaft 4 in sequence. Cooperate to achieve high and low gear switching. That is to say, the present invention adopts the high efficiency of mechanical power transmission and the infinitely variable speed of hydraulic transmission to form a multi-interval infinitely variable speed assembly, so that each gear interval can realize the maximum speed from 0 speed to the corresponding gear, and the driving speed of the tractor It can be adjusted between 0-50 km/h to meet the speed requirements of various operations on the tractor, greatly improve the performance of the product, and greatly improve the applicability of the whole machine.
其中,为了使得游星减速机构能够HMT输出锥齿轮9以及一轴2传动配合,其游星减速机构的具体设置结构为:所述游星减速机构包括有齿圈一13、中心齿轮轴14、设置在中心齿轮轴14上的太阳轮一15、以及设置在太阳轮一15与齿圈一13之间并转动连接在行星架一16上的行星齿轮一17,中心齿轮轴14的输入端套装有与HMT输出锥齿轮9相啮合的传动输出锥齿轮18。Wherein, in order to enable the planetary reduction mechanism to be able to HMT output the bevel gear 9 and the first shaft 2 to drive and cooperate, the specific setting structure of the planetary reduction mechanism is: the planetary reduction mechanism includes a ring gear 13, a central gear shaft 14, The sun gear one 15 that is arranged on the sun gear shaft 14, and the planetary gear one 17 that is arranged between the sun gear one 15 and the ring gear one 13 and is rotatably connected on the planet carrier one 16, the input end of the sun gear shaft 14 is sleeved There is a transmission output bevel gear 18 meshing with the HMT output bevel gear 9 .
与此同时,为了使得接合齿套12轴线移动而与输出齿轮轴4或行星减速机 构的行星架二21相接合、进而实现高低挡位的切换,在本实施例中,行星减速机构的具体设置结构为:所述行星减速机构包括有设置在输出齿轮轴4上的太阳轮二19、设置在壳体上的齿圈二20、以及设置在太阳轮二19与齿圈二20之间并转动连接在行星架二21上的行星齿轮二22,所述接合齿套12能与太阳轮二19或行星架二21相结合。At the same time, in order to make the engaging tooth sleeve 12 move axially and engage with the output gear shaft 4 or the second planet carrier 21 of the planetary reduction mechanism, and then realize the switching of high and low gears, in this embodiment, the specific setting of the planetary reduction mechanism The structure is: the planetary reduction mechanism includes a sun gear 19 arranged on the output gear shaft 4, a ring gear 20 arranged on the housing, and a sun gear 2 19 and a ring gear 20 arranged between the second sun gear 19 and the ring gear 20 to rotate The second planetary gear 22 connected to the second planetary carrier 21 , the engaging tooth sleeve 12 can be combined with the second sun gear 19 or the second planetary carrier 21 .
更进一步,在本实施例中,本产品具备有四个速度挡位,即挡位齿轮组的具体设置结构为:所述挡位齿轮组包括有相啮合的一挡主动齿轮23与一挡被动齿轮24、二挡主动齿轮25与二挡被动齿轮26、三挡主动齿轮27与三挡被动齿轮28、四挡主动齿轮29与四挡被动齿轮30,二挡主动齿轮25、三挡主动齿轮27以及四挡主动齿轮29均套装在中间齿轮轴3上,一挡被动齿轮24、二挡被动齿轮26以及三挡被动齿轮28均套装在输出齿轮轴4上,一挡主动齿轮23与中间齿轮轴3之间、四挡被动齿轮30与输出齿轮轴4之间均为一体式结构,即一挡主动齿轮23的齿面直接开设在中间齿轮轴3的外周壁面上,四挡被动齿轮30的齿面直接开设在输出齿轮轴4的外周壁面上;中间齿轮轴3通过三四挡同步器32能与三挡主动齿轮27或四挡主动齿轮29相结合,输出齿轮轴4通过一二挡同步器31能与一挡被动齿轮24或二挡被动齿轮26相结合。Furthermore, in this embodiment, this product is equipped with four speed gears, that is, the specific setting structure of the gear set is as follows: the gear set includes a first gear driving gear 23 and a first gear passive gear that are meshed. Gear 24, second gear driving gear 25 and second gear passive gear 26, third gear driving gear 27 and third gear passive gear 28, fourth gear driving gear 29 and fourth gear passive gear 30, second gear driving gear 25, third gear driving gear 27 And the fourth gear driving gear 29 is all set on the intermediate gear shaft 3, the first gear driven gear 24, the second gear driven gear 26 and the third gear driven gear 28 are all sleeved on the output gear shaft 4, the first gear driving gear 23 and the intermediate gear shaft 3, between the fourth-speed passive gear 30 and the output gear shaft 4 are all integral structures, that is, the tooth surface of the first-speed driving gear 23 is directly set on the outer peripheral wall surface of the intermediate gear shaft 3, and the tooth surface of the fourth-speed passive gear 30 The surface is directly set on the outer peripheral wall of the output gear shaft 4; the intermediate gear shaft 3 can be combined with the third gear driving gear 27 or the fourth gear driving gear 29 through the third and fourth gear synchronizers 32, and the output gear shaft 4 can be combined with the first and second gear synchronizers. 31 can be combined with first gear driven gear 24 or second gear driven gear 26.
此外,所述壳体包括有前壳体33与后箱体34,所述输入锥齿轮轴1、一轴2、游星减速机构均设置在前壳体33上,所述中间齿轮轴3、输出齿轮轴4、挡位齿轮组以及行星减速机构均设置在后箱体34上。In addition, the housing includes a front housing 33 and a rear case 34. The input bevel gear shaft 1, the first shaft 2 and the planetary reduction mechanism are all arranged on the front housing 33. The intermediate gear shaft 3, The output gear shaft 4 , the gear set and the planetary reduction mechanism are all arranged on the rear case 34 .
上述实施例仅为本发明的较佳实施例之一,并非以此限制本发明的实施范围,故:凡依本发明的形状、结构、原理所做的等效变化,均应涵盖于本发明的保护范围之内。The above-described embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Therefore: all equivalent changes made according to the shape, structure and principle of the present invention should be covered by the present invention. within the scope of protection.

Claims (5)

  1. 一种拖拉机变速箱,其特征在于:包括有壳体,所述壳体内转动连接有输入锥齿轮轴(1)、一轴(2)、中间齿轮轴(3)以及输出齿轮轴(4),输入锥齿轮轴(1)通过花键套(5)与一轴(2)联动,一轴(2)通过啮合齿(6)与游星减速机构的齿圈一(13)啮合传动,输入锥齿轮轴(1)通过传动输入锥齿轮(7)与HMT输入锥齿轮(8)啮合传动,HMT输出锥齿轮(9)与游星减速机构的太阳轮一(15)传动连接,游星减速机构的行星架一(16)上套装有输出齿轮(10),中间齿轮轴(3)上套装有与输出齿轮(10)啮合的输入齿轮(11),中间齿轮轴(3)与输出齿轮轴(4)之间通过挡位齿轮组传动连接,输出齿轮轴(4)上设置有行星减速机构与接合齿套(12),接合齿套(12)轴向移动能与输出齿轮轴(4)或行星减速机构的行星架二(21)相接合。A gearbox for a tractor is characterized in that: it includes a housing, the housing is rotationally connected with an input bevel gear shaft (1), a shaft (2), an intermediate gear shaft (3) and an output gear shaft (4), The input bevel gear shaft (1) is linked with the first shaft (2) through the spline sleeve (5). The gear shaft (1) is meshed with the HMT input bevel gear (8) through the transmission input bevel gear (7), and the HMT output bevel gear (9) is connected to the sun gear one (15) of the planetary reduction mechanism. An output gear (10) is set on the planet carrier one (16), and an input gear (11) meshed with the output gear (10) is set on the intermediate gear shaft (3), and the intermediate gear shaft (3) and the output gear shaft ( 4) are connected through a transmission gear set. The output gear shaft (4) is provided with a planetary reduction mechanism and an engaging gear sleeve (12). The planet carrier two (21) of the planetary reduction mechanism is engaged.
  2. 根据权利要求1所述的一种拖拉机变速箱,其特征在于:所述游星减速机构包括有齿圈一(13)、中心齿轮轴(14)、设置在中心齿轮轴(14)上的太阳轮一(15)、以及设置在太阳轮一(15)与齿圈一(13)之间并转动连接在行星架一(16)上的行星齿轮一(17),中心齿轮轴(14)的输入端套装有与HMT输出锥齿轮(9)相啮合的传动输出锥齿轮(18)。A tractor gearbox according to claim 1, characterized in that: the planetary reduction mechanism includes a ring gear one (13), a central gear shaft (14), and a sun set on the central gear shaft (14). Wheel one (15), and the planetary gear one (17) that is arranged between the sun gear one (15) and the ring gear one (13) and rotates and is connected on the planetary carrier one (16), the sun gear shaft (14) The input end is sleeved with a transmission output bevel gear (18) meshed with the HMT output bevel gear (9).
  3. 根据权利要求1所述的一种拖拉机变速箱,其特征在于:所述行星减速机构包括有设置在输出齿轮轴(4)上的太阳轮二(19)、设置在壳体上的齿圈二(20)、以及设置在太阳轮二(19)与齿圈二(20)之间并转动连接在行星架二(21)上的行星齿轮二(22),所述接合齿套(12)能与太阳轮二(19)或行星架二(21)相结合。A tractor gearbox according to claim 1, characterized in that: the planetary reduction mechanism includes a sun gear 2 (19) set on the output gear shaft (4), a ring gear 2 set on the housing, (20), and the second planetary gear (22) arranged between the second sun gear (19) and the second ring gear (20) and rotatably connected to the second planetary carrier (21), the engaging tooth sleeve (12) can Combine with sun gear two (19) or planet carrier two (21).
  4. 根据权利要求1所述的一种拖拉机变速箱,其特征在于:所述挡位齿轮组包括有相啮合的一挡主动齿轮(23)与一挡被动齿轮(24)、二挡主动齿轮(25) 与二挡被动齿轮(26)、三挡主动齿轮(27)与三挡被动齿轮(28)、四挡主动齿轮(29)与四挡被动齿轮(30),二挡主动齿轮(25)、三挡主动齿轮(27)以及四挡主动齿轮(29)均套装在中间齿轮轴(3)上,一挡被动齿轮(24)、二挡被动齿轮(26)以及三挡被动齿轮(28)均套装在输出齿轮轴(4)上,一挡主动齿轮(23)与中间齿轮轴(3)之间、四挡被动齿轮(30)与输出齿轮轴(4)之间均为一体式结构,中间齿轮轴(3)通过三四挡同步器(32)能与三挡主动齿轮(27)或四挡主动齿轮(29)相结合,输出齿轮轴(4)通过一二挡同步器(31)能与一挡被动齿轮(24)或二挡被动齿轮(26)相结合。A tractor gearbox according to claim 1, characterized in that: the gear set includes a first gear driving gear (23), a first gear driven gear (24), a second gear driving gear (25) ) and second gear driven gear (26), third gear driving gear (27) and third gear driven gear (28), fourth gear driving gear (29) and fourth gear driven gear (30), second gear driving gear (25), The third gear driving gear (27) and the fourth gear driving gear (29) are all sleeved on the intermediate gear shaft (3), and the first gear driven gear (24), the second gear driven gear (26) and the third gear driven gear (28) are all set on the intermediate gear shaft (3). Set on the output gear shaft (4), between the first-speed driving gear (23) and the intermediate gear shaft (3), between the fourth-speed driven gear (30) and the output gear shaft (4) are all integral structures, and the middle The gear shaft (3) can be combined with the third gear driving gear (27) or the fourth gear driving gear (29) through the third and fourth gear synchronizers (32), and the output gear shaft (4) can pass through the first and second gear synchronizers (31). Combined with the first gear driven gear (24) or the second gear driven gear (26).
  5. 根据权利要求1所述的一种拖拉机变速箱,其特征在于:所述壳体包括有前壳体(33)与后箱体(34),所述输入锥齿轮轴(1)、一轴(2)、游星减速机构均设置在前壳体(33)上,所述中间齿轮轴(3)、输出齿轮轴(4)、挡位齿轮组以及行星减速机构均设置在后箱体(34)上。A tractor gearbox according to claim 1, characterized in that: the housing includes a front housing (33) and a rear case (34), the input bevel gear shaft (1), a shaft ( 2), the planetary reduction mechanism is all arranged on the front housing (33), and the intermediate gear shaft (3), the output gear shaft (4), the gear set and the planetary reduction mechanism are all arranged on the rear case (34 )superior.
PCT/CN2021/101820 2021-06-10 2021-06-23 Tractor transmission WO2022257188A1 (en)

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