CN108468775B

CN108468775B - Differential type four-wheel drive transmission of articulated vehicle

Info

Publication number: CN108468775B
Application number: CN201810482742.0A
Authority: CN
Inventors: 肖名涛; 孙松林; 熊力; 陈斌; 王登榆; 陈盛
Original assignee: Hunan Agricultural University
Current assignee: Hunan Agricultural University
Priority date: 2018-05-18
Filing date: 2018-05-18
Publication date: 2024-03-26
Anticipated expiration: 2038-05-18
Also published as: CN108468775A

Abstract

The invention relates to a differential type four-wheel drive transmission, which comprises a box body assembly, a secondary speed change assembly, a gear shifting assembly, a main speed change assembly, an inter-axle differential assembly and a front driving assembly, wherein the gear shifting assembly comprises a secondary speed change gear shifting assembly, a main speed change gear shifting assembly and a four-wheel drive gear shifting assembly. The invention has compact structure, can realize the rear wheel drive of the transport vehicle when running on a light load and good road surface, adopts the front wheel drive when running on a light load and non-hard road surface, adopts the differential four-wheel drive when running on a full load and good road surface, adopts the differential locking four-wheel drive when running on a full load and non-hard road surface, can realize multiple mode drive, and obtains good driving capability and reduces transmission loss.

Description

Differential type four-wheel drive transmission of articulated vehicle

Technical Field

The invention belongs to the technical field of speed variators, and particularly relates to a differential type four-wheel drive speed changer of an articulated vehicle.

Background

In articulated vehicles, particularly articulated tractors, because tractors typically travel or operate on fields, loose, non-rigid surfaces and hard surfaces. When the tractor runs or works in the field, the slipping phenomenon is very easy to occur due to the fact that the soil texture in the field is soft and the bearing capacity is poor, and even if the tractor adopts open four-wheel drive, the slipping and vehicle sinking phenomenon is unavoidable. The problems mentioned above are also present when driving on loose, non-rigid road surfaces, so that four wheel drives, in particular inter-axle differential locking four-wheel drives, are easily used. However, if the differential locking is adopted when the vehicle runs on a hard road surface, the tire is seriously worn due to the fact that the running paths of the front wheel and the rear wheel are possibly unequal, and the differential four-wheel drive or the independent front wheel drive or the independent rear wheel drive can be easily adopted. In order for a tractor to achieve good driving performance and low-speed climbing performance, a low-speed crawling gear is generally required to be set. Therefore, in order to obtain good driving capability and reduce transmission loss, for articulated tractors, rear wheel drive is generally adopted when a light load is carried out on a good road surface, front wheel drive is adopted when a light load is carried out on a non-hard road surface, differential four-wheel drive is required when a full load is carried out on a good road surface, and differential locking four-wheel drive is required when a full load is carried out on a non-hard road surface.

In view of the foregoing, there is a need for an articulated differential type four-wheel drive transmission for vehicles, which has stable performance, is safe and reliable, has a compact structure, and can achieve good driving performance and low-speed climbing performance.

Disclosure of Invention

The invention aims to provide the differential type four-wheel drive transmission of the articulated vehicle, which has stable performance, safety, reliability and compact structure and can obtain good driving performance and low-speed climbing performance.

The above purpose is realized by the following technical scheme: the utility model provides an articulated vehicle differential type four-wheel drive transmission, includes box subassembly, vice speed change subassembly, shift subassembly, main speed change subassembly, interaxial differential subassembly and preceding actuating unit, box subassembly includes at least the box, vice speed change subassembly, shift subassembly, main speed change subassembly, interaxial differential subassembly and preceding actuating unit are fixed on the box, shift subassembly includes vice speed change shift subassembly, main speed change shift subassembly and four-wheel drive shift subassembly, vice speed change subassembly includes vice speed change output shaft gear, vice speed change output shaft, input shaft duplicate gear and input shaft at least, vice speed change output shaft gear slides and sets up on the vice speed change output shaft, input shaft duplicate gear is fixed to be set up on the input shaft, vice speed change shift subassembly includes at least vice speed change shift fork, vice speed change shift fork with vice speed change output shaft gear links to each other, vice speed change shift fork can drive vice speed change output shaft gear along vice speed change output shaft's axial slip and realize vice speed change output gear and the meshing of the different gears on the input shaft duplicate gear, and then form the power transmission of different proportion; the main speed change assembly comprises a reverse gear shaft assembly, a first shaft assembly and a second shaft assembly, wherein the reverse gear shaft assembly at least comprises a reverse gear shaft and a reverse gear arranged on the reverse gear shaft, the first shaft assembly at least comprises a first shaft, a first gear driving gear, a reverse gear driving gear, a second gear driving gear and a third gear driving gear which are fixedly arranged on the first shaft, and the first shaft and the auxiliary speed change output shaft are connected through internal splines; the two-shaft assembly at least comprises a two shaft, a two-shaft driven gear, a middle shaft, a four-wheel drive gear, a reverse gear combining sleeve and a two-three gear combining sleeve, wherein the two shaft is sleeved in the middle shaft through a middle shaft needle bearing, the middle shaft is provided with the reverse gear driven gear, a first gear driven gear, a second gear driven gear and a three-gear driven gear through the middle shaft needle bearing, the two-shaft driven gear is fixedly connected with the two shaft through a spline, and the four-wheel drive gear is connected to the middle shaft through a spline in a sliding manner; the first-gear driving gear, the second-gear driving gear and the third-gear driving gear are respectively meshed with the first-gear driven gear, the second-gear driven gear and the third-gear driven gear, and the reverse-gear driving gear is meshed with the reverse-gear and the reverse-gear driven gear; the intermediate shaft is provided with a reverse gear spline hub and a second and third gear spline hub through splines, the reverse gear spline hub is arranged between the reverse gear driven gear and the first gear driven gear, the second and third gear spline hub is arranged between the second gear driven gear and the third gear driven gear, the reverse gear spline hub and the second and third gear spline hub are respectively sleeved with a reverse gear combining sleeve and a second and third gear combining sleeve, the main speed change shifting assembly at least comprises a reverse gear shifting fork and a second and third gear shifting fork, the reverse gear shifting fork can drive the reverse gear combining sleeve to move along the reverse gear spline hub and realize the engagement of the reverse gear combining sleeve and the reverse gear driven gear or the first gear driven gear, and the second and third gear shifting fork can drive the second and third gear combining sleeve to move along the second and third gear spline hub and realize the engagement of the second and the third gear driven gear or the third gear driven gear; the inter-axle differential assembly comprises a front axle assembly, a rear axle assembly and a four-wheel drive differential assembly, wherein the rear axle assembly at least comprises a rear axle, a rear axle gear and a rear axle differential gear; the front axle assembly at least comprises a front axle, a front axle gear and a front axle differential gear; the four-wheel drive differential assembly at least comprises a differential driven gear, a planetary gear shaft carrier, a planetary gear shaft carrier shaft sleeve and a planetary gear shaft sleeve; the front shaft is connected with the rear shaft through a needle bearing, the differential driven gear is fixed on the planetary gear shaft frame, the planetary gear shaft frame is arranged on the rear shaft through a planetary gear shaft frame shaft sleeve and can rotate along the rear shaft, the rear shaft differential gear and the rear shaft gear are arranged on the rear shaft, the front shaft differential gear and the front shaft gear are arranged on the front shaft, a plurality of planetary gear shafts are arranged on the planetary gear shaft frame, the planetary gear shafts are uniformly arranged along the circumferential direction of the differential driven gear and limited through the differential driven gear, the planetary gear is arranged on the planetary gear shafts through a planetary gear shaft sleeve, and two sides of the planetary gear are meshed with the front shaft differential gear and the rear shaft differential gear respectively to form a differential transmission system; the four-wheel drive shifting assembly at least comprises a four-wheel drive shifting fork connected with a four-wheel drive driving gear, the four-wheel drive shifting fork drives the four-wheel drive driving gear to move along the intermediate shaft, and the four-wheel drive driving gear can be meshed with the front shaft gear and/or the driven gear of the differential mechanism or internally meshed with the two-wheel driven gear; the front driving assembly comprises a bevel gear shaft assembly, an inter-wheel differential shaft assembly, a right driving axle assembly and a left driving axle assembly, wherein the bevel gear shaft assembly at least comprises a bevel gear shaft and a driven bevel gear fixedly arranged on the bevel gear shaft, the driven bevel gear is meshed with the driving bevel gear, and the bevel gear shaft assembly transmits power to the right driving axle assembly and the left driving axle assembly through the wheel differential assembly.

In the specific application process, external power is transmitted to the input shaft, the external power is transmitted to the input shaft duplex gear through the input shaft, the auxiliary speed change shifting fork drives the auxiliary speed change output shaft gear to axially slide along the auxiliary speed change output shaft, engagement of different gears on the auxiliary speed change output gear and the input shaft duplex gear is realized, further power transmission with different proportions is formed, the auxiliary speed change output shaft outputs power to a shaft in a high-low gear mode, the shaft serves as a main speed change input shaft to receive power and drive a first-gear driving gear, a reverse gear driving gear, a second-gear driving gear and a third-gear driving gear to rotate, the first-gear driven gear, the reverse gear driven gear, the second-gear driven gear and the third-gear driven gear which are engaged with the auxiliary speed change output shaft are respectively driven to rotate, the first-gear reverse gear shifting fork controls the first-gear combining sleeve to move, the reverse gear combining sleeve is enabled to be engaged with the reverse gear driven gear or the first-gear driven gear, the middle shaft outputs reverse gear or the first-gear through the four-gear driving gear, and the second-third-gear combining sleeve is enabled to move along the second-third-gear spline hub and enable the second-gear driving gear or the third-gear driving gear to be engaged with the middle shaft to be driven by the four-gear driving assembly.

The four-wheel drive shifting fork controls the four-wheel drive driving gear to move along the intermediate shaft, and can realize the engagement of the four-wheel drive driving gear with the front shaft gear and/or the engagement of the differential driven gear and the inner engagement of the four-wheel drive shifting fork with the two-shaft driven gear, so that the power transmission at different positions is realized; when the four-wheel drive shifting fork is at the forefront rear drive position, power after gear conversion is transmitted to the four-wheel drive driving gear which is meshed with the rear shaft gear, and as the planetary gear shaft frame of the four-wheel drive differential assembly has no driving force input, the planetary gear shaft frame is in a free state, the differential mechanism does not act, only the rear shaft generates power output, and independent rear drive is realized.

When the four-wheel drive shifting fork locks the four-wheel drive position at the middle differential speed, the power after gear conversion is transmitted to the four-wheel drive driving gear, the four-wheel drive driving gear is meshed with the rear shaft gear and the differential driven gear, and the differential locking output is realized because the rear shaft gear serving as the half shaft gear and the differential driven gear on the planetary gear shaft frame are at the same speed, and the rotating speed of the differential driven gear is equal to that of the differential shell, the rear shaft gear and the front shaft gear, so that the differential locking four-wheel drive is realized; the power transmission route at this time is: and (3) rear-drive: the four-wheel drive driving gear is connected to the rear axle gear and then connected to the rear axle; precursor: the four-wheel drive driving gear is connected to the differential driven gear, to the planetary gear shaft frame, to the planetary gear shaft, to the planetary gear, to the front axle differential gear, to the front axle gear, to the two-axle driven gear, and to the two axles.

When the four-wheel drive fork shaft is at the middle differential four-wheel drive position, power after gear conversion is transmitted to a four-wheel drive driving gear which is meshed with a driven gear of a differential mechanism, and as a rear shaft gear and a front shaft gear serving as half shaft gears are not controlled by the four-wheel drive driving gear, the differential mechanism is in a differential state, so that the differential four-wheel drive between shafts can be realized; power transmission route at this time: and (3) rear-drive: the four-wheel drive driving gear, the differential driven gear, the planetary gear shaft frame, the planetary gear shaft, the planetary gear, the rear axle differential gear and the rear axle; precursor: the four-wheel drive driving gear is connected to the differential driven gear, to the planetary gear shaft frame, to the planetary gear shaft, to the planetary gear, to the front axle differential gear, to the front axle gear, to the two-axle driven gear, and to the two axles.

When the four-wheel drive fork shaft is at an independent front drive position, power after gear conversion is transmitted to the four-wheel drive driving gear, and the power is only transmitted to the front shaft through the outer teeth on the four-wheel drive driving gear and the inner teeth of the two-shaft driven gear, at the moment, the planetary gear shaft frame is in a free state, the differential mechanism does not act, only the front shaft generates power output, and the power transmission route is as follows: the four-wheel drive driving gear is connected to the two-shaft driven gear and then connected to the two shafts.

In the process of the precursor, power is output by two shafts, a driving bevel gear on the two shafts is meshed with a driven bevel gear of a bevel gear shaft assembly to transmit the power to the precursor assembly, and the bevel gear shaft assembly transmits the power to a right drive axle assembly and a left drive axle assembly through a wheel differential assembly.

The invention has stable performance, safety, reliability and compact structure, can realize rear wheel drive when the transportation vehicle is usually driven on a light-load good road surface, adopts front wheel drive when the transportation vehicle is driven on a light-load non-hard road surface, adopts differential four-wheel drive when the transportation vehicle is driven on a full-load good road surface, adopts differential locking four-wheel drive when the transportation vehicle is driven on a full-load non-hard road surface, and adopts four-wheel drive when the transportation vehicle is driven on a low-speed ascending slope or crawling, thus realizing multiple mode drive, obtaining good driving capability and reducing transmission loss.

The auxiliary speed change shifting assembly further comprises an auxiliary speed change shifting fork shaft, an auxiliary speed change shifting seat bolt, an auxiliary speed change shifting seat and an auxiliary speed change shifting rod, the main speed change shifting assembly further comprises a reverse speed change shifting fork shaft, a second speed change shifting fork shaft, a third speed change shifting fork shaft, a main speed change shifting rod and a main speed change shifting seat bolt, the fourth speed change shifting assembly further comprises a fourth speed change shifting rod, a fourth speed change shifting seat bolt and a fourth speed change shifting fork shaft, the auxiliary speed change shifting seat, the main speed change shifting seat and the fourth speed change shifting seat are fixed on the box body through the auxiliary speed change shifting seat bolt, the main speed change shifting rod and the fourth speed change shifting seat bolt respectively, the first reverse speed change shifting fork shaft, the second speed change shifting fork shaft and the fourth speed change shifting fork shaft are connected with the main speed change shifting rod, and the auxiliary speed change shifting fork shaft are respectively connected with the auxiliary speed change shifting fork shaft, the second speed change shifting fork shaft, the third speed change shifting fork shaft and the fourth speed change shifting fork shaft, and the first speed change shifting fork shaft, the second speed change shifting fork shaft and the fourth speed change shifting fork shaft are respectively.

Preferably, the bevel gear shaft assembly further comprises a bevel gear shaft deep groove ball bearing, a bevel gear shaft end cover bolt, a bevel gear shaft sleeve, a bevel gear shaft driving gear, a bevel gear shaft angle contact bearing and a bevel gear shaft end cover.

According to a further technical scheme, the inter-wheel differential shaft assembly comprises an inter-wheel differential shaft end cover, a right half shaft, an inter-wheel differential driven gear, an inter-wheel differential shell, inter-wheel differential planetary gears, differential support shafts, a left half shaft and inter-wheel differential planetary gear shafts, the differential support shafts are fixedly connected with the inter-wheel differential shaft end cover through inter-wheel differential shaft end cover bolts, the inter-wheel differential shaft end cover is fixed on the box through inter-wheel differential shaft end cover bolts, the right half shaft and the left half shaft are arranged on the differential support shafts through inter-wheel differential shaft sleeves and can rotate on the differential support shafts, the inter-wheel differential planetary gear shafts are fixedly arranged on the differential support shafts and are uniformly arranged along the circumferential direction of inter-wheel differential driven gears, the inter-wheel differential planetary gears are arranged on the inter-wheel differential planetary gear shafts through inter-wheel differential shaft sleeve sleeves, the planetary gear shafts are arranged on the planetary gear carriers and are limited through inter-wheel differential driven gears, the inter-wheel differential shaft sleeves are arranged on the driving bevel gears, the driving bevel gears are arranged on the driving bevel gears and the driving bevel gears, the driving gears are arranged on the driving gears, and the driving gears are meshed with the left half shaft and the driving gears, and the driving gears are arranged on the driving gears, and the driving gears are meshed with the left half shaft and the driving gears.

Preferably, the right half shaft and the left half shaft are provided with inter-wheel differential shaft thrust bearings for fixing and positioning.

The right drive axle assembly comprises a right drive axle snap ring, a right drive axle driven gear, a right drive axle bolt, a right drive axle housing, a right drive axle sealing ring and a right drive bearing, wherein the left drive axle assembly comprises a left drive axle snap ring, a left drive axle driven gear, a left drive axle bolt, a left drive axle housing, a left drive axle sealing ring and a left drive bearing, the right drive axle is connected with the right drive axle housing through the right drive bearing, the right drive axle housing is fixed with the box body through the right drive axle bolt, the left drive axle housing is connected with the left drive axle housing through the left drive axle bolt and is fixed with the box body, and the right drive axle driven gear and the left drive axle driven gear are respectively fixedly arranged on the right drive axle and the left drive axle and are respectively meshed with the right axle driving gear and the left axle driving gear.

When the rotation speeds of the left and right driving axles are the same currently: the inter-wheel differential planetary gear revolves around the differential support shaft, and the differential outputs at a constant speed. The power transmission route at this time is: the drive bevel gear, the driven bevel gear, the bevel gear shaft drive gear, the inter-wheel differential driven gear, the inter-wheel differential shell, the inter-wheel differential planetary gear shaft, the inter-wheel differential planetary gear (the inter-wheel differential planetary gear only revolves around the differential support shaft at the moment), then one path passes through the right half shaft gear, the right half shaft drive gear, the right driving shaft driven gear and the right driving shaft; the other path passes through the left half shaft gear, the left half shaft driving gear, the left driving shaft driven gear, the left driving shaft and the differential mechanism and is output at a left constant speed and a right constant speed.

When the front left and right driving axles are differentiated: the inter-wheel differential planetary gear revolves around the differential support shaft and rotates around the inter-wheel differential planetary gear shaft, and the differential mechanism outputs left and right differential speed. The power transmission route at this time is: the drive bevel gears to the driven bevel gears, to the bevel gear shafts, to the bevel gear shaft drive gears, to the inter-wheel differential driven gears, to the inter-wheel differential housing, to the inter-wheel differential planetary gear shafts, to the inter-wheel differential planetary gears (the inter-wheel differential planetary gears revolve around the differential support shaft and also rotate around the inter-wheel differential planetary gear shafts), and then one path passes through the right half shaft gear, to the right half shaft drive gear, to the right drive shaft driven gear, and to the right drive shaft; the other path passes through the left half shaft gear, the left half shaft driving gear, the left driving shaft driven gear, the left driving shaft and the left differential mechanism to output left and right differential.

The auxiliary speed change assembly further comprises a clutch bolt, an auxiliary speed change bearing, an auxiliary speed change output shaft retainer ring, an input shaft sealing ring and an input shaft end cover, wherein the input shaft is connected with the input shaft end cover through the auxiliary speed change bearing, the input shaft end cover is fixed on the box body, the input shaft end cover is internally provided with the input shaft sealing ring, the auxiliary speed change output shaft retainer ring is sleeved on the auxiliary speed change output shaft, and the auxiliary speed change output shaft is fixed with the box body through the auxiliary speed change bearing.

The reverse gear shaft assembly further comprises a reverse gear shaft snap ring, a reverse gear shaft thrust bearing, a reverse gear wheel and a reverse gear shaft needle bearing, wherein the reverse gear wheel is sleeved on the reverse gear shaft through the reverse gear shaft needle bearing, the reverse gear shaft thrust bearing is arranged on one side of the reverse gear wheel, and the reverse gear shaft snap ring is arranged on two sides of the reverse gear shaft to position the reverse gear shaft on the box body.

The technical scheme is that the one-shaft assembly further comprises a shaft bearing and a shaft clamping ring, the shaft clamping ring is sleeved on the one shaft, and the one shaft is arranged on the box body through the shaft bearing; the two-shaft assembly further comprises a middle shaft clamping ring, a middle shaft bearing clamping ring, a middle shaft retaining ring, a two-shaft angle contact bearing, a two-shaft end cover and a two-shaft end cover bolt, wherein the middle shaft clamping ring and the middle shaft retaining ring are sleeved on the middle shaft, and the middle shaft is connected with the box body through the middle shaft bearing; the two shafts are fixedly connected with the two shaft end covers through two shaft angle contact bearings, the two shaft end covers are fixed on the box body through two shaft end cover bolts, and the intermediate shaft bearing clamping ring is used for limiting the intermediate shaft bearings.

The front shaft assembly comprises a front shaft gear, a front shaft thrust bearing retainer ring, a front shaft sleeve and a front shaft, wherein the front shaft gear is arranged on the front shaft through a spline, the front shaft thrust bearing retainer ring is arranged between the thrust bearing and the front shaft gear and positions the front shaft gear, and the front shaft is arranged on the rear shaft through the front shaft sleeve; the rear axle assembly further comprises a rear axle end cover, a rear axle end cover bolt, a rear axle angle contact bearing, a rear axle sealing ring and a rear axle snap ring, wherein the rear axle gear is connected with the rear axle through a spline and is limited by the rear axle snap ring and the rear axle step, one end of the rear axle is connected with the front axle through a needle bearing, the other end of the rear axle is fixedly connected with the rear axle end cover through the rear axle angle contact bearing, the rear axle end cover is fixedly connected with the box body through the rear axle end cover bolt, and the rear axle sealing ring is arranged in the rear axle end cover.

The four-wheel drive differential assembly further comprises a planet gear thrust shaft sleeve and a planet gear shaft frame thrust shaft sleeve, wherein the planet gear shaft frame thrust shaft sleeve is arranged between two sides of the planet gear shaft frame and the front shaft and the rear shaft, and the planet gear thrust shaft sleeve is arranged between the planet gear and the planet gear shaft frame.

The further technical scheme is that the box assembly further comprises a box cover, a ventilation bolt, a box bolt, an oil drain bolt and a clutch cover, wherein the ventilation bolt is arranged on the box, the box cover is fixed on the box through the box bolt, and the clutch cover is fixedly connected with the box.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

FIG. 1 is an exterior view of a transmission according to one embodiment of the present invention;

FIG. 2 is a vertical cross-section of the transmission referred to in FIG. 1;

FIG. 3 is a cross-sectional view of the transmission referred to in FIG. 2 taken along the plane K-K;

FIG. 4 is a cross-sectional view of the transmission of FIG. 2 taken along the H-H plane;

FIG. 5 is a schematic illustration of a secondary transmission assembly according to one embodiment of the present invention;

FIG. 6 is a schematic illustration of a main transmission assembly according to one embodiment of the present invention;

FIG. 7 is a schematic view of an interaxle differential assembly according to an embodiment of the present invention;

fig. 8 and 9 are schematic structural views of a front driving assembly according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view of a transmission assembly and an inter-axle differential assembly in accordance with one embodiment of the present invention as alone rear-drive;

FIG. 11 is a cross-sectional view of a transmission assembly and an inter-axle differential assembly in accordance with one embodiment of the present invention in a differential lock-up four-wheel drive configuration;

FIG. 12 is a cross-sectional view of a differential four-wheel drive of a transmission assembly and an inter-axle differential assembly in accordance with one embodiment of the present invention;

fig. 13 is a cross-sectional view of a transmission assembly and an inter-axle differential assembly according to an embodiment of the present invention as separate precursors.

In the figure:

gear shifting assembly of A box assembly B auxiliary speed changing assembly C

Front driving assembly of D main speed changing assembly E interaxial differential assembly F

A1 case lid A2 ventilation bolt A3 case body bolt

A4 box A5 oil drain bolt A6 clutch cover

B11 clutch bolt B12 auxiliary speed change output shaft gear B13 auxiliary speed change output shaft

B14 auxiliary speed changing output shaft retainer ring B15 auxiliary speed changing bearing B16 input shaft retainer ring

B17 input shaft sealing ring B18 input shaft duplex gear B19 input shaft end cover

B20 input shaft C1 auxiliary variable speed gear shifting assembly C2 main variable speed gear shifting assembly

C3 four-wheel-drive gear shifting assembly C11 auxiliary speed shifting fork C12 auxiliary speed shifting fork shaft

C13 auxiliary speed change gear shift seat bolt C14 auxiliary speed change gear shift seat C15 auxiliary speed change gear shift lever

Main speed changing and shifting seat of C21 one-reverse gear shifting fork shaft C22 two-three gear shifting fork shaft C23

C24 main speed change gear lever C25 main speed change gear shift seat bolt C26 two-three-gear shifting fork

C27 one-reverse shift fork C31 four-drive gear shift rod C32 four-drive gear shift seat

C33 four-wheel-drive gear shifting seat bolt C34 four-wheel-drive shifting fork shaft C35 four-wheel-drive shifting fork

D1 reverse gear shaft assembly D2 first shaft assembly D3 second shaft assembly

D11 reverse gear shaft snap ring D12 reverse gear shaft thrust bearing D13 reverse gear

D14 reverse gear shaft needle roller bearing D15 reverse gear shaft D21 one shaft

D22 first-gear driving gear D23 reverse-gear driving gear D24 first-axis bearing

D25 second gear driving gear D26 first shaft clamping ring D27 third gear driving gear

D31 four-wheel drive driving gear D32 intermediate shaft D33 two shafts

D34 intermediate shaft snap ring D35 intermediate shaft bearing D36 intermediate shaft needle bearing

D37 reverse gear driven gear D38 reverse gear spline hub D39 reverse gear combined sleeve

D310 first-gear driven gear D311 second-gear driven gear D312 second-gear and third-gear combined sleeve

D313 second three keeps off spline hub D314 three keeps off driven gear D315 jackshaft bearing snap ring

D316 drive bevel gear D317 intermediate shaft retainer ring D318 two-shaft driven gear

D319 two-shaft corner contact bearing D320 two-shaft end cover D321 two-shaft end cover bolt

E1 front axle assembly E2 rear axle assembly E3 four-wheel drive differential assembly

E11 front axle gear E12 front axle thrust bearing E13 front axle thrust bearing retainer ring

E14 front axle sleeve E15 front axle E16 front axle differential gear

Rear shaft angle contact bearing of rear shaft cover E22 and rear shaft cover bolt E23 of rear shaft cover E21

E24 rear axle sealing ring E25 rear axle E26 rear axle gear

E27 rear axle snap ring E28 rear axle differential gear E31 planetary gear shaft bracket

E32 planetary gear shaft E33 differential driven gear E34 driven gear bolt

E35 planetary gear thrust sleeve E36 planetary gear E37 planetary gear carrier sleeve

E38 planetary gear sleeve E39 planetary gear carrier thrust sleeve F1 bevel gear shaft assembly

F2 inter-wheel differential shaft assembly F3 right drive axle assembly F4 left drive axle assembly

F11 bevel gear shaft deep groove ball bearing F12 bevel gear shaft end cover bolt F13 bevel gear shaft sleeve

F14 bevel gear shaft drive gear F15 bevel gear shaft F16 driven bevel gear

F17 bevel gear shaft angle contact bearing F18 bevel gear shaft end cover F21 inter-wheel differential shaft end cover bolt

Differential shaft end cover F22 among the wheels, differential shaft angle contact bearing F23 among the wheels and differential shaft thrust bearing F24 among the wheels

F25 right half-shaft driving gear F26 right half-shaft F27 inter-wheel differential driven gear

F28 right half axle gear F29 interwheel differential shell F210 interwheel differential planetary gear shaft sleeve

F211 inter-wheel differential planetary gear F212 left side gear F213 left side axle drive gear

F214 differential support shaft F215 interwheeled differential shaft sleeve F216 left half shaft

F217 inter-wheel differential planet gear shaft F218 inter-wheel differential driven gear bolt F31 right driving shaft snap ring

F32 right driving shaft driven gear F33 right driving bearing F34 right driving axle bolt

F35 right driving axle housing F36 right driving axle sealing ring F37 right driving axle

F41 left drive shaft snap ring F42 left drive shaft driven gear F43 left drive shaft

F44 left drive axle bolt F45 left drive axle housing F46 left drive axle sealing ring

F47 left driving bearing

Detailed Description

The following detailed description of the invention, taken in conjunction with the accompanying drawings, is given by way of illustration and explanation only, and should not be taken as limiting the scope of the invention in any way. Furthermore, the features in the embodiments and in the different embodiments in this document can be combined accordingly by a person skilled in the art from the description of this document.

1-13, an articulated vehicle differential type four-wheel drive transmission 31 comprises a box body assembly A, a secondary speed change assembly B, a gear shift assembly C, a main speed change assembly D, an inter-shaft differential assembly E and a front driving assembly F, wherein the box body assembly A at least comprises a box body A4, the secondary speed change assembly B, the gear shift assembly C, the main speed change assembly D, the inter-shaft differential assembly E and the front driving assembly F are fixed on the box body A4, the gear shift assembly C comprises a secondary speed change and gear shift assembly C1, a main speed change and gear shift assembly C2 and a four-wheel drive and gear shift assembly C3, the secondary speed change assembly B at least comprises a secondary speed change output shaft gear B12, a secondary speed change output shaft B13, an input shaft duplex gear B18 and an input shaft B20, the secondary speed change output shaft gear B12 is arranged on the secondary speed change output shaft B13 in a sliding manner, the secondary speed change assembly C1 at least comprises a secondary speed change fork C11, the secondary speed change output shaft C11 is connected with the secondary speed change output shaft B12, the secondary speed change output shaft B is in a sliding manner, and the secondary speed change output shaft B is in a different from the speed change output shaft B12 and is in a sliding manner, and the speed change output shaft B is in a sliding ratio and different from the speed change and is in the speed change and meshed with the speed change output shaft B; the main speed change assembly D comprises a reverse gear shaft assembly D1, a first shaft assembly D2 and a second shaft assembly D3, the reverse gear shaft assembly D1 at least comprises a reverse gear shaft D15 and a reverse gear D13 arranged on the reverse gear shaft D15, the first shaft assembly D2 at least comprises a first shaft D21, a first gear driving gear D22, a reverse gear driving gear D23, a second gear driving gear D25 and a third gear driving gear D27 which are fixedly arranged on the first shaft D21, and the first shaft D21 and the auxiliary speed change output shaft B13 are connected through internal splines; the two-shaft assembly D3 at least comprises a two-shaft D33, a two-shaft driven gear D318, an intermediate shaft D32, a four-wheel drive driving gear D31, a reverse gear combination sleeve D39 and a two-three gear combination sleeve D312, wherein the two-shaft D33 is sleeved in the intermediate shaft D32 in an empty mode through an intermediate shaft needle bearing D36, the intermediate shaft D32 is provided with a reverse gear driven gear D37, a first-gear driven gear D310, a second-gear driven gear D311 and a three-gear driven gear D314 through the intermediate shaft needle bearing D36, the two-shaft driven gear D318 is fixedly connected with the two-shaft D33 through a spline, and the four-wheel drive driving gear D31 is connected to the intermediate shaft D32 in a sliding mode through the spline; the first-gear driving gear D22, the second-gear driving gear D25 and the third-gear driving gear D27 are respectively meshed with the first-gear driven gear D310, the second-gear driven gear D311 and the third-gear driven gear D314, and the reverse-gear driving gear D23 is meshed with the reverse-gear D13 and the reverse-gear driven gear D37; the intermediate shaft D32 is provided with a reverse gear spline hub D38 and a second and third gear spline hub D313 through splines, the reverse gear spline hub D38 is arranged between the reverse gear driven gear D37 and the first gear driven gear D310, the second and third gear spline hub D313 is arranged between the second gear driven gear D311 and the third gear driven gear D314, the first reverse gear combining sleeve D39 and the second and third gear combining sleeve D312 are respectively sleeved on the first reverse gear spline hub D38 and the second and third gear spline hub D313, the main speed change shifting assembly C2 at least comprises a reverse gear shifting fork C27 and a second and third gear shifting fork C26, the first reverse gear shifting fork C27 can drive the first reverse gear combining sleeve D39 to move along the first reverse gear spline hub D38 and realize the engagement of the first reverse gear combining sleeve D39 and the reverse gear driven gear D37 or the first gear driven gear D310, and the second and third gear shifting fork C26 can drive the second and third gear combining sleeve D312 to move along the second and third gear spline hub D313 and realize the reverse gear engagement of the second and third gear combining sleeve D312 and the third gear driven gear D314; the inter-axle differential assembly E comprises a front axle assembly E1, a rear axle assembly E2 and a four-wheel-drive differential assembly E3, wherein the rear axle assembly E2 at least comprises a rear axle E25, a rear axle gear E26 and a rear axle differential gear E28; the front axle assembly E1 at least comprises a front axle E15, a front axle gear E11 and a front axle differential gear E16; the four-wheel drive differential assembly E3 at least comprises a differential driven gear E33, a planetary gear shaft E32, a planetary gear shaft carrier E31, a planetary gear E36, a planetary gear shaft carrier sleeve E37 and a planetary gear shaft sleeve E38; the front shaft E15 is connected with the rear shaft E25 through a needle bearing, the differential driven gear E33 is fixed on the planetary gear shaft frame E31, the planetary gear shaft frame E31 is installed on the rear shaft E25 through a planetary gear shaft frame sleeve E37 and can rotate along the rear shaft E25, the rear shaft differential gear E28 and the rear shaft gear E26 are arranged on the rear shaft E25, the front shaft differential gear E16 and the front shaft gear E11 are arranged on the front shaft E15, a plurality of planetary gear shafts E32 are arranged on the planetary gear shaft frame E31, the planetary gear shafts E32 are uniformly arranged along the circumferential direction of the differential driven gear E33 and are limited through the differential driven gear E33, the planetary gear E36 is arranged on the planetary gear shafts E32 through the planetary gear shaft sleeve E38, and two sides of the planetary gear E36 are respectively meshed with the front shaft differential gear E16 and the rear shaft differential gear E28 and form a transmission system 3; the two-shaft driven gear D318 is meshed with the front shaft gear E11, the four-wheel-drive shifting assembly C3 at least comprises a four-wheel-drive shifting fork C35 connected with the four-wheel-drive driving gear D31, the four-wheel-drive shifting fork C35 drives the four-wheel-drive driving gear D31 to move along the middle shaft D32, and the four-wheel-drive driving gear D31 can be meshed with the front shaft gear E11 and/or the differential driven gear E33 or internally meshed with the two-shaft driven gear D318; the front driving assembly F comprises a bevel gear shaft assembly F1, an inter-wheel differential shaft assembly F2, a right driving axle assembly F3 and a left driving axle assembly F4, the bevel gear shaft assembly F1 at least comprises a bevel gear shaft F15 and a driven bevel gear F16 fixedly arranged on the bevel gear shaft F15, the driven bevel gear F16 is meshed with the driving bevel gear D316, and the bevel gear shaft assembly F1 transmits power to the right driving axle assembly F3 and the left driving axle assembly F4 through wheel differential assemblies.

In the specific application process, as shown in fig. 4-13, external power is transmitted to the input shaft B20, the external power is transmitted to the input shaft duplex gear B18 through the input shaft B20, the auxiliary speed change shifting fork C11 drives the auxiliary speed change output shaft gear B12 to slide along the axial direction of the auxiliary speed change output shaft B13, and engagement of the auxiliary speed change output gear with different gears on the input shaft duplex gear B18 is achieved, further power transmission with different proportions is formed, the auxiliary speed change output shaft B13 outputs power to the first shaft D21 in a high-low gear mode, the first shaft D21 serves as a main speed change input shaft B20 to receive power and drive the first speed change driving gear D22, the reverse speed change driving gear D23, the second speed change driving gear D25 and the third speed driving gear D27 to rotate, the first speed change driven gear D310, the reverse speed driven gear D37, the second speed change driven gear D311 and the third speed driven gear D314 meshed with the auxiliary speed change output shaft C11 are respectively driven to rotate, the first reverse speed change speed shifting fork C27 controls the first reverse speed change combining sleeve D39 to move, and the reverse speed change combining sleeve D37 or the first speed change driven gear D310 to be meshed with the first speed change driven gear D32, the first speed change speed driven gear D32 is meshed with the second speed change speed driven gear D31, and the third speed change driven gear D32 are meshed with the second speed driven gear D32D 31 through the third speed change driving gear D3D 31 or the third speed driven gear D3D 31.

The four-wheel drive shifting fork C35 controls the four-wheel drive driving gear D31 to move along the intermediate shaft D32, and can achieve meshing of the four-wheel drive driving gear D31 with the front shaft gear E11 and/or meshing of the differential driven gear E33 or internal meshing of the two-shaft driven gear D318, so that power transmission at different positions is achieved.

As shown in fig. 10, when the four-wheel drive fork C35 is at the forefront rear-drive position, the power after gear shift is transmitted to the four-wheel drive driving gear D31, the four-wheel drive driving gear D31 is meshed with the rear axle gear E26, and the planetary gear shaft frame E31 of the four-wheel drive differential assembly E3 has no driving force input, the planetary gear shaft frame E31 is in a free state, the differential mechanism does not act, only the rear axle E25 generates power output, and single rear drive is realized.

As shown in fig. 11, when the four-wheel drive fork C35 is in the intermediate differential locking four-wheel drive position, the power after the shift is transmitted to the four-wheel drive driving gear D31, the four-wheel drive driving gear D31 is engaged with the rear axle gear E26 and the differential driven gear E33, and the differential locking output is achieved because the differential driven gear E33 on the rear axle gear E26 and the planetary gear carrier E31 as the side axle gears is at the same speed, and the differential locking four-wheel drive is achieved because the rotational speed of the differential driven gear E33 is at the same speed as the differential housing, the rear axle gear E26, and the front axle gear E11; the power transmission route at this time is: and (3) rear-drive: the four-wheel drive driving gear D31 to the rear axle gear E26 and then to the rear axle E25; precursor: the four-wheel drive driving gear D31 to the differential driven gear E33, to the planetary gear shaft carrier E31, to the planetary gear shaft E32, to the planetary gear E36, to the front axle differential gear E16, to the front axle E15, to the front axle gear E11, to the two-axle driven gear D318, to the two-axle D33.

As shown in fig. 12, when the four-wheel drive fork shaft C34 is in the intermediate differential four-wheel drive position, the power after gear shift is transmitted to the four-wheel drive driving gear D31, the four-wheel drive driving gear D31 is meshed with the differential driven gear E33, and since the rear shaft gear E26 and the front shaft gear E11 as the side gears are not controlled by the four-wheel drive driving gear D31, the differential is in a differential state, and four-wheel drive of inter-axle differential can be realized; power transmission route at this time: and (3) rear-drive: the four-wheel drive driving gear D31 to the differential driven gear E33, to the planetary gear shaft carrier E31, to the planetary gear shaft E32, to the planetary gear E36, to the rear axle differential gear E28, and to the rear axle E25; precursor: the four-wheel drive driving gear D31 to the differential driven gear E33, to the planetary gear shaft carrier E31, to the planetary gear shaft E32, to the planetary gear E36, to the front axle differential gear E16, to the front axle E15, to the front axle gear E11, to the two-axle driven gear D318, to the two-axle D33.

As shown in fig. 13, when the four-wheel drive fork shaft C34 is in the single-wheel drive position, the power after gear shift is transmitted to the four-wheel drive gear D31, and is combined with the internal teeth of the two-shaft driven gear D318 through the external teeth on the four-wheel drive gear, since the power is transmitted to the front axle E15 only, the planetary gear shaft frame E31 is in a free state, the differential mechanism does not act, only the front axle E15 generates power output, and the power transmission route: the four-wheel drive gear D31 to the two-axis driven gear D318 and then to the two-axis D33.

In the precursor process, as shown in fig. 8 and 9, power is output by a two-shaft D33, and a drive bevel gear D316 on the two-shaft D33 is meshed with a driven bevel gear F16 of a bevel gear shaft assembly F1 to transmit power to the precursor assembly, and the bevel gear shaft assembly F1 transmits power to a right drive axle assembly F3 and a left drive axle assembly F4 through a wheel differential assembly.

In another embodiment of the present invention, as shown in fig. 2 and fig. 4, the auxiliary gear shifting assembly C1 further includes an auxiliary gear shifting shaft C12, an auxiliary gear shifting seat bolt C13, an auxiliary gear shifting seat C14 and an auxiliary gear shifting rod C15, the main gear shifting assembly C2 further includes a first gear shifting fork shaft C21, a second and third gear shifting fork shaft C22, a main gear shifting seat C23, a main gear shifting rod C24 and a main gear shifting seat bolt C25, the fourth gear shifting assembly C3 further includes a fourth gear shifting rod C31, a fourth gear shifting seat C32, a fourth gear shifting seat bolt C33 and a fourth gear shifting fork shaft C34, the auxiliary gear shifting seat C14, the main gear shifting seat C23 and the fourth gear shifting seat C32 are respectively fixed on the box body A4 through the auxiliary gear shifting seat bolt C13, the main gear shifting seat bolt C25 and the fourth gear shifting seat bolt C33, the auxiliary gear shifting rod C15, the main gear shifting rod C24 and the fourth gear shifting rod C24 are respectively fixed on the first gear shifting shaft C21, the second gear shifting seat C22 and the auxiliary gear shifting fork shaft C34, the first gear shifting rod C21 and the fourth gear shifting rod C34 are respectively connected to the auxiliary gear shifting seat C21, the first gear shifting seat C21 and the fourth gear shifting rod C34, the auxiliary gear shifting rod C21 and the auxiliary gear shifting seat C34 are respectively, and the auxiliary gear shifting rod C21 and the auxiliary gear shifting seat C34 are respectively arranged on the auxiliary gear shifting seat C12, and the auxiliary gear shifting seat C32, and the auxiliary gear shifting seat C21 and the auxiliary gear shifting seat C32 are respectively, and the auxiliary gear shifting shafts are respectively connected to the auxiliary gear shifting shafts and the auxiliary gear shifting shafts C21 and the auxiliary gear shifting seat C21, and the auxiliary gear shifting seat C are respectively, and the auxiliary gear shifting shafts are respectively, and the auxiliary gear shifting and are respectively, and are fixed.

In another embodiment of the present invention, as shown in fig. 8 and 9, the bevel gear shaft assembly F1 further includes a bevel gear shaft deep groove ball bearing F11, a bevel gear shaft cover bolt F12, a bevel gear shaft sleeve F13, a bevel gear shaft F15, a bevel gear shaft driving gear F14, a bevel gear shaft angle contact bearing F17, and a bevel gear shaft cover F18.

In another embodiment of the present invention, as shown in fig. 8 and 9, the inter-wheel differential shaft assembly F2 includes an inter-wheel differential shaft end cover F22, a right half shaft F26, an inter-wheel differential driven gear F27, an inter-wheel differential housing F29, an inter-wheel differential planetary gear F211, a differential support shaft F214, a left half shaft F216 and an inter-wheel differential planetary gear shaft F217, the differential support shaft F214 is fixedly connected with the inter-wheel differential shaft end cover F22 through an inter-wheel differential shaft angular contact bearing F23, the inter-wheel differential shaft end cover F22 is fixed on the case A4 through an inter-wheel differential shaft end cover bolt F21, the right half shaft F26 and the left half shaft F216 are disposed on the differential support shaft F214 through an inter-wheel differential shaft sleeve F215 and rotatable with respect to the differential support shaft F214, the inter-wheel differential gear shaft F217 is fixed on the differential support shaft F214 and uniformly disposed along the circumferential direction of the inter-wheel differential driven gear F27, the inter-wheel differential planetary gear F211 is arranged on the inter-wheel differential planetary gear shaft F217 through an inter-wheel differential planetary gear shaft sleeve F210, the inter-wheel differential shell F29 is fixed through the inter-wheel differential planetary gear shaft F217 and sleeved on the right half shaft F26 through an inter-wheel differential shaft sleeve F215, the planetary gear shaft E32 is arranged on the planetary gear E36 frame and limited through an inter-wheel differential driven gear F27 outer ring, the inter-wheel differential shell F29 is provided with an inter-wheel differential shaft sleeve F215, a right half shaft F26, the inter-wheel differential driven gear F27 is arranged on the inter-wheel differential shell F29 through an inter-wheel differential driven gear bolt F218, the right half shaft F26 is provided with a right half shaft driving gear F25 and a right half shaft gear F28, the left half shaft F216 is provided with a left driving gear F213 and a left half shaft gear F212, and the left half shaft gear F212, the right half shaft gear F28 is meshed with an inter-wheel differential planetary gear F211 to form a differential transmission system 3, the bevel gear shaft F15 is provided with a bevel gear shaft driving gear F14, and the inter-wheel differential driven gear F27 is meshed with the bevel gear shaft driving gear F14.

In another embodiment of the present invention, as shown in fig. 9, the right half shaft F26 and the left half shaft F216 are provided with inter-wheel differential shaft thrust bearings F24 for fixing and positioning.

In another embodiment of the present invention, as shown in fig. 8 and 9, the right drive axle assembly F3 includes a right drive axle snap ring F31, a right drive axle driven gear F32, a right drive axle F37, a right drive axle bolt F34, a right drive axle housing F36, a right drive axle seal ring F33, and the left drive axle assembly F4 includes a left drive axle snap ring F41, a left drive axle driven gear F42, a left drive axle F43, a left drive axle bolt F44, a left drive axle housing F45, a left drive axle seal ring F46, and a left drive bearing F47, the right drive axle F37 is connected to the right drive axle housing through the right drive axle bearing F33, the right drive axle housing is connected to the left drive axle housing F45 through the right drive axle bolt F34, the left drive axle housing F45 is connected to the left drive axle housing F4 through the left drive axle bolt F44, the right drive axle driven gear F32 and the left drive axle driven gear F42 are respectively fixed to the left drive axle housing F37 and the right drive axle housing F25, and the left drive axle driven gear F213 are meshed with the left drive axle housing F45.

When the rotation speeds of the left and right driving axles are the same currently: the inter-wheel differential planetary gear F211 revolves around the differential support shaft F214, and the differential outputs at right and left constant speeds. The power transmission route at this time is: the drive bevel gears D316 to the driven bevel gears F16, to the bevel gear shafts F15, to the bevel gear shaft drive gear F14, to the inter-wheel differential driven gear F27, to the inter-wheel differential housing F29, to the inter-wheel differential pinion shafts F217, to the inter-wheel differential pinion F211 (when the inter-wheel differential pinion F211 revolves around the differential support shaft F214 only), then all the way through the right side gear F28, to the right side shaft drive gear F25, to the right drive shaft driven gear F32, to the right drive shaft F37; the other path passes through the left half shaft gear F212, the left half shaft driving gear F213, the left driving shaft driven gear F42, the left driving shaft F43 and the differential left and right constant speed output.

When the front left and right driving axles are differentiated: the inter-wheel differential planetary gear F211 revolves around the differential support shaft F214 and rotates around the inter-wheel differential planetary gear shaft F217, and the differential outputs left and right. The power transmission route at this time is: the drive bevel gears D316 to the driven bevel gears F16, to the bevel gear shafts F15, to the bevel gear shaft drive gear F14, to the inter-wheel differential driven gear F27, to the inter-wheel differential housing F29, to the inter-wheel differential pinion shafts F217, to the inter-wheel differential pinion gears F211 (the inter-wheel differential pinion gears F211 revolve around the differential support shaft F214 and also spin around the inter-wheel differential pinion shafts F217), and then all the way through the right side axle gear F28, to the right side axle drive gear F25, to the right drive shaft driven gear F32, to the right drive shaft F37; the other path passes through the left half shaft gear F212, the left half shaft driving gear F213, the left driving shaft driven gear F42, the left driving shaft F43 and the differential left and right differential output.

In another embodiment of the present invention, as shown in fig. 5, the auxiliary speed changing assembly B further includes a clutch bolt B11, an auxiliary speed changing bearing B15, an auxiliary speed changing output shaft retainer ring B14, an input shaft sealing ring B20, and an input shaft end cover B19, where the input shaft B20 is connected with the input shaft end cover B19 through the auxiliary speed changing bearing B15, the input shaft end cover B19 is fixed on the box A4, the input shaft end cover B19 is internally provided with the input shaft sealing ring B20, the auxiliary speed changing output shaft retainer ring B14 is sleeved on the auxiliary speed changing output shaft B13, and the auxiliary speed changing output shaft B13 is fixed with the box A4 through the auxiliary speed changing bearing B15.

In another embodiment of the present invention, as shown in fig. 6, the reverse gear shaft assembly D1 further includes a reverse gear shaft snap ring D11, a reverse gear shaft thrust bearing D12 and a reverse gear shaft needle bearing D14, the reverse gear D13 is sleeved on the reverse gear shaft D15 through the reverse gear shaft needle bearing D14, the reverse gear shaft thrust bearing D12 is disposed on one side of the reverse gear D13, and the reverse gear shaft snap ring D11 is disposed on two sides of the reverse gear shaft D15 to position the reverse gear shaft D15 on the case A4.

In another embodiment of the present invention, as shown in fig. 6, the axle assembly D2 further includes an axle bearing D24 and an axle snap ring D26, the axle snap ring D26 is sleeved on the axle D21, and the axle D21 is disposed on the box A4 through the axle bearing D24; the two-shaft assembly D3 further comprises a middle shaft clamping ring D34, a middle shaft bearing D35 clamping ring, a middle shaft check ring D317, a two-shaft angle contact bearing D319, a two-shaft end cover D320 and a two-shaft end cover bolt D321, wherein the middle shaft clamping ring D34 and the middle shaft check ring D317 are sleeved on the middle shaft D32, and the middle shaft D32 is connected with the box body A4 through the middle shaft bearing D35; the two shafts D33 are fixedly connected with the two shaft end covers D320 through two shaft angle contact bearings D319, the two shaft end covers D320 are fixed on the box body A4 through two shaft end cover bolts D321, and the intermediate shaft bearing clamping rings D315 are used for limiting the intermediate shaft bearings D35.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 7, the front axle assembly E1 includes a front axle gear E11, a front axle thrust bearing E12, a front axle thrust bearing retainer E13, a front axle sleeve E14 and a front axle E15, the front axle gear E11 is mounted on the front axle E15 through a spline, the front axle thrust bearing retainer E13 is mounted between the thrust bearing and the front axle gear E11 and positions the front axle gear E11, and the front axle E15 is mounted on the rear axle E25 through the front axle sleeve E14; the front shaft assembly E1 front shaft gear E11 front shaft thrust bearing E12 front shaft thrust bearing retainer ring E13 front shaft sleeve E14 front shaft E15 the rear shaft assembly E2 still includes rear shaft end cover E21, rear shaft end cover bolt E22, rear shaft angle contact bearing E23, rear shaft sealing washer E24 and rear shaft retainer ring E27, rear shaft gear E26 passes through the spline and is connected with rear shaft E25 and passes through rear shaft retainer ring E27 is spacing with rear shaft E25 axle step, rear shaft E25 one end is connected with front shaft E15 through bearing, the other end pass through rear shaft angle contact bearing E23 with rear shaft end cover E21 fixed connection, rear shaft end cover E21 passes through rear shaft end cover bolt E22 fixed connection on box A4, rear shaft sealing washer E24 sets up in the rear shaft end cover E21.

In another embodiment of the present invention, as shown in fig. 7, the four-wheel differential assembly E3 further includes a planetary gear thrust sleeve E35 and a planetary gear carrier thrust sleeve E39, the planetary gear carrier thrust sleeve E39 is installed between the front axle E15 and the rear axle E25 and both sides of the planetary gear carrier E31, and the planetary gear thrust sleeve E35 is installed between the planetary gear E36 and the planetary gear carrier E31.

In another embodiment of the present invention, as shown in fig. 1 and 2, the box assembly a further includes a box cover A1, a ventilation bolt A2, a box bolt A3, an oil drain bolt A5, and a clutch cover A6, where the ventilation bolt A2 is disposed on the box A4, the box cover A1 is fixed on the box A4 through the box bolt A3, and the clutch cover A6 is fixedly connected with the box A4.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The differential type four-wheel drive transmission of the articulated vehicle is characterized by comprising a box body assembly, a secondary speed changing assembly, a gear shifting assembly, a main speed changing assembly, an inter-shaft differential assembly and a front driving assembly, wherein the box body assembly at least comprises a box body, the secondary speed changing assembly, the gear shifting assembly, the main speed changing assembly, the inter-shaft differential assembly and the front driving assembly are fixed on the box body, the gear shifting assembly comprises a secondary speed changing and gear shifting assembly, the main speed changing and gear shifting assembly and the four-wheel drive gear shifting assembly, the secondary speed changing assembly at least comprises a secondary speed changing output shaft gear, a secondary speed changing output shaft, an input shaft duplex gear and an input shaft, the secondary speed changing output shaft gear is arranged on the secondary speed changing output shaft in a sliding mode, the input shaft duplex gear is fixedly arranged on the input shaft, the secondary speed changing and gear shifting assembly at least comprises a secondary speed changing shifting fork, the secondary speed changing fork can drive the secondary speed changing output shaft gear to slide along the axial direction of the secondary speed changing output shaft and realize meshing of different gears on the secondary speed changing output shaft duplex gear, and further power transmission with different ratios are formed; the main speed change assembly comprises a reverse gear shaft assembly, a first shaft assembly and a second shaft assembly, wherein the reverse gear shaft assembly at least comprises a reverse gear shaft and a reverse gear arranged on the reverse gear shaft, the first shaft assembly at least comprises a first shaft, a first gear driving gear, a reverse gear driving gear, a second gear driving gear and a third gear driving gear which are fixedly arranged on the first shaft, and the first shaft and the auxiliary speed change output shaft are connected through internal splines; the two-shaft assembly at least comprises a two shaft, a two-shaft driven gear, a middle shaft, a four-wheel drive gear, a reverse gear combining sleeve and a two-three gear combining sleeve, wherein the two shaft is sleeved in the middle shaft through a middle shaft needle bearing, the middle shaft is provided with the reverse gear driven gear, a first gear driven gear, a second gear driven gear and a three-gear driven gear through the middle shaft needle bearing, the two-shaft driven gear is fixedly connected with the two shaft through a spline, and the four-wheel drive gear is connected to the middle shaft through a spline in a sliding manner; the first-gear driving gear, the second-gear driving gear and the third-gear driving gear are respectively meshed with the first-gear driven gear, the second-gear driven gear and the third-gear driven gear, and the reverse-gear driving gear is meshed with the reverse-gear and the reverse-gear driven gear; the intermediate shaft is provided with a reverse gear spline hub and a second and third gear spline hub through splines, the reverse gear spline hub is arranged between the reverse gear driven gear and the first gear driven gear, the second and third gear spline hub is arranged between the second gear driven gear and the third gear driven gear, the reverse gear spline hub and the second and third gear spline hub are respectively sleeved with a reverse gear combining sleeve and a second and third gear combining sleeve, the main speed change shifting assembly at least comprises a reverse gear shifting fork and a second and third gear shifting fork, the reverse gear shifting fork can drive the reverse gear combining sleeve to move along the reverse gear spline hub and realize the engagement of the reverse gear combining sleeve and the reverse gear driven gear or the first gear driven gear, and the second and third gear shifting fork can drive the second and third gear combining sleeve to move along the second and third gear spline hub and realize the engagement of the second and the third gear driven gear or the third gear driven gear; the inter-axle differential assembly comprises a front axle assembly, a rear axle assembly and a four-wheel drive differential assembly, wherein the rear axle assembly at least comprises a rear axle, a rear axle gear and a rear axle differential gear; the front axle assembly at least comprises a front axle, a front axle gear and a front axle differential gear; the four-wheel drive differential assembly at least comprises a differential driven gear, a planetary gear shaft carrier, a planetary gear shaft carrier shaft sleeve and a planetary gear shaft sleeve; the front shaft is connected with the rear shaft through a needle bearing, the differential driven gear is fixed on the planetary gear shaft frame, the planetary gear shaft frame is arranged on the rear shaft through a planetary gear shaft frame shaft sleeve and can rotate along the rear shaft, the rear shaft differential gear and the rear shaft gear are arranged on the rear shaft, the front shaft differential gear and the front shaft gear are arranged on the front shaft, a plurality of planetary gear shafts are arranged on the planetary gear shaft frame, the planetary gear shafts are uniformly arranged along the circumferential direction of the differential driven gear and limited through the differential driven gear, the planetary gear is arranged on the planetary gear shafts through a planetary gear shaft sleeve, and two sides of the planetary gear are meshed with the front shaft differential gear and the rear shaft differential gear respectively to form a differential transmission system; the four-wheel drive shifting assembly at least comprises a four-wheel drive shifting fork connected with a four-wheel drive driving gear, the four-wheel drive shifting fork drives the four-wheel drive driving gear to move along the intermediate shaft, and the four-wheel drive driving gear can be meshed with the front shaft gear and/or the driven gear of the differential mechanism or internally meshed with the two-wheel driven gear; the front driving assembly comprises a bevel gear shaft assembly, an inter-wheel differential shaft assembly, a right driving axle assembly and a left driving axle assembly, wherein the bevel gear shaft assembly at least comprises a bevel gear shaft and a driven bevel gear fixedly arranged on the bevel gear shaft, the driven bevel gear is meshed with the driving bevel gear, and the bevel gear shaft assembly transmits power to the right driving axle assembly and the left driving axle assembly through the wheel differential assembly.

2. The differential four-way transmission for an articulated vehicle according to claim 1, wherein the auxiliary gear shifting assembly further comprises an auxiliary gear shifting fork shaft, an auxiliary gear shifting seat bolt, an auxiliary gear shifting seat and an auxiliary gear shifting lever, the main gear shifting assembly further comprises a reverse gear shifting fork shaft, two three-gear shifting fork shafts, a main gear shifting seat, a main gear shifting lever and a main gear shifting seat bolt, the four-way gear shifting assembly further comprises a four-way gear shifting lever, a four-way gear shifting seat bolt and a four-way gear shifting fork shaft, the auxiliary gear shifting seat, the main gear shifting seat and the four-way gear shifting seat are fixed on the box body through the auxiliary gear shifting fork shaft, the main gear shifting lever and the four-way gear shifting lever, the reverse gear shifting fork shaft, the two three-gear shifting fork shaft are connected with the main gear shifting fork shaft, the auxiliary gear shifting fork shaft, the four-way gear shifting fork shaft, the two-way gear shifting fork shaft and the four-way gear shifting fork shaft are respectively fixed on the auxiliary gear shifting fork shaft, the two-way gear shifting fork shaft and the four-way gear shifting fork shaft.

3. An articulated vehicle differential four-drive transmission according to claim 1 or 2, characterized in that, the inter-wheel differential shaft assembly comprises an inter-wheel differential shaft end cover, a right half shaft, an inter-wheel differential driven gear, an inter-wheel differential shell, an inter-wheel differential planetary gear, a differential supporting shaft, a left half shaft and an inter-wheel differential planetary gear shaft, the differential supporting shaft is fixedly connected with the differential shaft end cover between the wheels through a differential shaft angle contact bearing between the wheels, the differential shaft end cover between the wheels is fixed on the box body through a differential shaft end cover bolt between the wheels, the right half shaft and the left half shaft are arranged on the differential support shaft through a differential shaft sleeve between the wheels and can rotate in the hollow sleeve on the differential support shaft, the inter-wheel differential planetary gear shafts are fixed on the differential support shaft and are uniformly arranged along the circumferential direction of the inter-wheel differential driven gear, the inter-wheel differential planetary gear is arranged on the inter-wheel differential planetary gear shaft through an inter-wheel differential planetary gear shaft sleeve, the inter-wheel differential shell is fixed through the inter-wheel differential planetary gear shaft and sleeved on the right half shaft through an inter-wheel differential shaft sleeve, the planetary gear shaft is arranged on the planetary gear carrier and limited by the outer ring of the inter-wheel differential driven gear, the inter-wheel differential driven gear is arranged on the inter-wheel differential shell through an inter-wheel differential driven gear bolt, the right half shaft is provided with a right half shaft driving gear and a right half shaft gear, the left half shaft is provided with a left half shaft driving gear and a left half shaft gear, the right half shaft gear and the inter-wheel differential planetary gear are meshed to form a differential transmission system, the bevel gear shaft is provided with a bevel gear shaft driving gear, and the inter-wheel differential driven gear is meshed with the bevel gear shaft driving gear.

4. The differential four-drive transmission for an articulated vehicle according to claim 3, wherein the right transaxle assembly includes a right driving shaft snap ring, a right driving shaft driven gear, a right driving shaft bolt, a right driving axle housing, a right driving shaft seal ring, a right driving bearing, the left transaxle assembly includes a left driving shaft snap ring, a left driving shaft driven gear, a left driving shaft, a left driving axle bolt, a left driving axle housing, a left driving shaft seal ring, and a left driving bearing, the right driving shaft is connected with the right driving axle housing through the right driving bearing, the right driving axle housing is fixed with the case through the right driving axle bolt, the left driving axle housing is fixed with the case through the left driving axle bolt, and the right driving shaft driven gear and the left driving shaft driven gear are fixedly disposed on the right driving shaft and the left driving shaft, respectively, and are engaged with the right driving axle driving gear and the left driving axle gear, respectively.

5. The differential four-wheel drive transmission for an articulated vehicle according to claim 3, wherein the auxiliary transmission assembly further comprises a clutch bolt, an auxiliary transmission bearing, an auxiliary transmission output shaft retainer ring, an input shaft sealing ring and an input shaft end cover, the input shaft is connected with the input shaft end cover through the auxiliary transmission bearing, the input shaft end cover is fixed on the box body, the input shaft sealing ring is arranged in the input shaft end cover, the auxiliary transmission output shaft retainer ring is sleeved on the auxiliary transmission output shaft, and the auxiliary transmission output shaft is fixed with the box body through the auxiliary transmission bearing.

6. The differential four-wheel drive transmission for an articulated vehicle according to claim 5, wherein the reverse gear shaft assembly further comprises a reverse gear shaft snap ring, a reverse gear shaft thrust bearing and a reverse gear shaft needle bearing, the reverse gear is sleeved on the reverse gear shaft through the reverse gear shaft needle bearing, the reverse gear shaft thrust bearing is arranged on one side of the reverse gear, and the reverse gear shaft snap ring is arranged on two sides of the reverse gear shaft to position the reverse gear shaft on the box body.

7. The differential four-drive transmission for an articulated vehicle according to claim 6, wherein the one-shaft assembly further comprises a one-shaft bearing and a one-shaft snap ring, the one-shaft snap ring being fitted over the one-shaft, the one-shaft being provided on the case through the one-shaft bearing; the two-shaft assembly further comprises a middle shaft clamping ring, a middle shaft bearing clamping ring, a middle shaft retaining ring, a two-shaft angle contact bearing, a two-shaft end cover and a two-shaft end cover bolt, wherein the middle shaft clamping ring and the middle shaft retaining ring are sleeved on the middle shaft, and the middle shaft is connected with the box body through the middle shaft bearing; the two shafts are fixedly connected with the two shaft end covers through two shaft angle contact bearings, the two shaft end covers are fixed on the box body through two shaft end cover bolts, and the intermediate shaft bearing clamping ring is used for limiting the intermediate shaft bearings.

8. The differential four-wheel drive transmission for an articulated vehicle according to claim 7, wherein the front axle assembly comprises a front axle gear, a front axle thrust bearing retainer, a front axle sleeve, and a front axle, the front axle gear being splined to the front axle, the front axle thrust bearing retainer being mounted between the thrust bearing and the front axle gear and locating the front axle gear, the front axle being mounted to the rear axle by the front axle sleeve; the rear axle assembly further comprises a rear axle end cover, a rear axle end cover bolt, a rear axle angle contact bearing, a rear axle sealing ring and a rear axle snap ring, wherein the rear axle gear is connected with the rear axle through a spline and is limited by the rear axle snap ring and the rear axle step, one end of the rear axle is connected with the front axle through a needle bearing, the other end of the rear axle is fixedly connected with the rear axle end cover through the rear axle angle contact bearing, the rear axle end cover is fixedly connected with the box body through the rear axle end cover bolt, and the rear axle sealing ring is arranged in the rear axle end cover.

9. The differential four-drive transmission for an articulated vehicle according to claim 8, wherein the four-drive differential assembly further comprises a planetary gear thrust sleeve and a planetary gear carrier thrust sleeve, the planetary gear carrier thrust sleeve being mounted between the planetary gear carrier and the front and rear axles on either side thereof, the planetary gear thrust sleeve being mounted between the planetary gear and the planetary gear carrier.

10. The differential four-drive transmission for an articulated vehicle according to claim 9, wherein the case assembly further comprises a case cover, a vent bolt, a case bolt, an oil drain bolt, and a clutch cover, the vent bolt being disposed on the case, the case cover being secured to the case by the case bolt, the clutch cover being fixedly connected to the case.