CN108443495B - Differential and differential locking four-wheel drive transfer case - Google Patents
Differential and differential locking four-wheel drive transfer case Download PDFInfo
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- CN108443495B CN108443495B CN201810481707.7A CN201810481707A CN108443495B CN 108443495 B CN108443495 B CN 108443495B CN 201810481707 A CN201810481707 A CN 201810481707A CN 108443495 B CN108443495 B CN 108443495B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims description 107
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 102000004315 Forkhead Transcription Factors Human genes 0.000 claims description 14
- 108090000852 Forkhead Transcription Factors Proteins 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Retarders (AREA)
Abstract
The invention relates to a four-wheel drive transfer case which comprises a case body assembly, an input shaft assembly, a rear drive assembly, a differential shaft assembly, a front drive assembly and a shifting fork assembly, wherein the shifting fork is connected with an input shaft gear, can drive the input shaft gear to slide along the axial direction of an input shaft, and can be meshed with the rear drive shaft gear of the rear drive assembly; the differential shaft assembly comprises a rear shaft assembly, a front shaft assembly and a differential assembly, a rear shaft gear of the rear shaft assembly is meshed with a rear driving shaft gear, a front driving gear of the front shaft assembly is meshed with a front driving shaft driven gear of the front driving assembly, two sides of a planetary gear of the differential assembly are respectively meshed with a front shaft differential gear of the front shaft assembly and a rear shaft differential gear of the rear shaft assembly to form a differential transmission system, and an input shaft gear can be meshed with the differential driven gear and/or the front driving gear. The invention has stable performance, safety, reliability and compact structure, and can obtain a plurality of driving modes of a front drive, a rear drive, a differential four-drive and a differential locking four-drive.
Description
Technical Field
The invention belongs to the technical field of transfer cases, and particularly relates to a differential and differential locking four-wheel drive transfer case.
Background
The automobile driving mode mainly comprises 3 modes of front drive, rear drive, four drive and the like. The four-wheel drive system applied to the passenger car at present mainly comprises a time-sharing four-wheel drive system, a timely four-wheel drive system, a full-time four-wheel drive system and the like. Because the time-sharing four-wheel drive system does not have an inter-axle differential mechanism, a driver is required to reasonably select a four-wheel drive or two-wheel drive scheme according to road conditions, and the power flow consumption in the drive system is easily caused due to improper selection. The system is usually applied to high-grade passenger vehicles because the system needs the assistance of an electric control system. The full-time four-wheel drive system can realize four-wheel drive in the whole course due to the fact that the Torson differential mechanism is arranged between shafts, manual intervention or intervention of an electric control system is not needed, but the Torson differential mechanism is complex in structure and high in price, and is only used on a few high-grade passenger cars. The differential four-wheel drive technology is adopted among all the axles of the penetrating drive axle on the heavy truck, and the penetrating drive axle is mainly used for increasing the rear drive force, but not forming an all-wheel drive structure, so that the requirement on differential locking is low, and an open differential is usually adopted among the penetrating drive axles.
However, in the field of articulated tractor trucks, steering occurs due to the relative deflection of the truck head and truck bed at the articulation point, and the operating conditions of the tractor vary greatly. Usually, rear wheel drive is required when the vehicle runs on a light-load good road surface, front wheel drive is adopted when the vehicle runs on a light-load non-hard road surface, differential four-wheel drive is required when the vehicle runs on a full-load good road surface, and differential locking four-wheel drive is required when the vehicle runs on a full-load non-hard road surface.
In view of the foregoing, it is desirable to provide a four-wheel transfer case that has stable performance, safety, reliability, and compact structure, and can implement multiple modes.
Disclosure of Invention
The invention aims to provide the four-wheel drive transfer case which has stable performance, safety, reliability and compact structure and realizes multiple modes.
The above purpose is realized by the following technical scheme: the differential and differential locking four-drive transfer case comprises a case body assembly, an input shaft assembly, a rear drive assembly, a differential shaft assembly, a front drive assembly and a shifting fork assembly, wherein the case body assembly at least comprises a case body, the input shaft assembly, the rear drive assembly, the differential shaft assembly and the shifting fork assembly are fixed on the case body, the input shaft assembly at least comprises an input shaft and an input shaft gear arranged on the input shaft, the input shaft can drive the input shaft gear to rotate, the shifting fork assembly at least comprises a shifting fork, the shifting fork is connected with the input shaft gear, the shifting fork can drive the input shaft gear to slide along the axial direction of the input shaft, the front drive assembly at least comprises a front drive shaft and a front drive shaft driven gear arranged on the front drive shaft, the rear drive assembly at least comprises a rear drive shaft and a rear drive shaft gear arranged on the rear drive shaft, the rear drive shaft is connected with the input shaft through a first needle bearing, and the input shaft gear can be meshed with the rear drive shaft gear; the differential shaft assembly comprises a rear shaft assembly, a front shaft assembly and a differential assembly, wherein the rear shaft assembly at least comprises a rear shaft, a rear shaft gear and a rear shaft differential gear; the front axle assembly at least comprises a front axle, a front drive gear and a front axle differential gear; the differential assembly at least comprises a differential driven gear, a planetary gear shaft carrier, a planetary gear thrust shaft sleeve, a planetary gear shaft carrier shaft sleeve, a planetary gear shaft sleeve and a thrust shaft sleeve; the front shaft is connected with the rear shaft through a second 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 on the rear shaft, the rear shaft differential gear and the rear shaft gear are arranged on the rear shaft, the rear shaft gear is positioned on the outer side of the rear shaft differential gear, the rear shaft gear is meshed with the rear driving shaft gear, the front shaft differential gear and the front driving gear are arranged on the front shaft, the front driving gear is positioned on the outer side of the front shaft differential gear, the front driving gear is meshed with the front driving shaft driven gear, a thrust shaft sleeve is respectively arranged between the planetary gear shaft frame and the rear shaft differential gear and between the planetary gear shaft frame and the front shaft differential gear, and the thrust shaft sleeve is respectively sleeved on the front shaft and the rear shaft, and the planetary gear shaft frame, the rear shaft differential gear and the front shaft differential gear are contacted with the thrust shaft sleeve; the planetary gear shaft frame is provided with a plurality of planetary gear shafts, the planetary gears are arranged on the planetary gear shafts through the planetary gear shaft sleeves, a planetary gear thrust shaft sleeve is arranged between the planetary gear shaft frame and the planetary gears, and the planetary gear shaft frame and the planetary gears are in contact with the planetary gear thrust shaft sleeve; the two sides of the planetary gear are respectively meshed with the front axle differential gear and the rear axle differential gear to form a differential transmission system, and the input axle gear can be meshed with the driven gear and/or the precursor gear of the differential mechanism.
Preferably, the number of the planet shafts and the planet gears arranged on the circumference is more than or equal to 2 and less than or equal to 4.
In the specific application process, external power is transmitted to the input shaft and is transmitted to the input shaft gear through the input shaft, the shifting fork drives the input shaft gear to move along the input shaft, so that the input shaft gear is meshed with the precursor gear, simultaneously meshed with the driven gear and the precursor gear of the differential, meshed with the driven gear of the differential and meshed with the rear drive shaft gear, and further, power transmission at different positions is realized;
when the shifting fork shaft is at the leftmost precursor position, the input shaft gear is only meshed with the precursor gear, the precursor gear transmits power to the precursor shaft driven gear meshed with the input shaft gear, and the precursor shaft driven gear drives the precursor shaft to rotate, so that precursor is realized.
When the shifting fork shaft is at the middle differential locking four-wheel drive position, the input shaft gear is meshed with the precursor gear and the differential driven gear simultaneously, the precursor gear transmits power to the precursor shaft driven gear meshed with the precursor gear, the precursor shaft driven gear drives the precursor shaft to rotate to realize precursor drive, the differential driven gear transmits power to the planetary gear shaft frame, then to the planetary gear shaft and the planetary gear, and then to the rear shaft differential gear and the rear shaft through the planetary gear, and then to the rear shaft gear meshed with the rear shaft gear through the rear shaft gear, and finally to the rear shaft to realize rear drive; because the input shaft gear is meshed with the precursor gear and the differential driven gear simultaneously, the rotating speeds of the planetary gear shaft bracket and the precursor shaft are the same, the front and the rear do not have differential speed, and the planetary gear shaft bracket and the precursor shaft are in a differential speed locking four-wheel drive state.
When the shifting fork shaft is at the middle differential four-wheel drive position, the input shaft gear is only meshed with the differential driven gear, the differential driven gear transmits power to the planetary gear shaft frame, the planetary gear shaft frame transmits power to the planetary gear shaft and the planetary gear, the planetary gear shaft frame transmits power to the front shaft differential gear and the rear shaft differential gear respectively through the planetary gear, then the planetary gear shaft transmits the power to the front shaft differential gear and the rear shaft differential gear respectively, the front shaft differential gear and the rear shaft differential gear respectively transmit the power to the front shaft driven gear meshed with the front shaft differential gear and the rear shaft differential gear respectively through the front shaft driven gear and the rear shaft driven gear, and finally the front shaft differential four-wheel drive is realized through the front shaft drive shaft and the rear shaft drive shaft.
When the shifting fork shaft is at the rightmost rear-drive position, the input shaft teeth are meshed with the rear-drive shaft gear for transmission, and power is transmitted to the rear-drive shaft through the rear-drive shaft gear, so that the input shaft and the rear-drive shaft are coaxially connected, and independent rear-drive is realized.
Because the transfer case is installed between front and rear drive axle main reducer, belongs to the high-speed end, the differential subassembly rotational speed in the transfer case is high, and the atress is little, and interaxle rotational speed is poor little. The differential assembly is therefore simplified and strengthened, in particular: firstly, the differential case is simplified, the traditional differential is provided with a differential case, and a side gear, a planetary gear and a planetary gear shaft are all arranged on the differential case, and two ends of the case are fixed on a case body. According to the differential mechanism assembly, the differential mechanism shell is replaced by the planetary gear shaft frame, the planetary gear shaft frame is sleeved on the rear shaft through the shaft sleeve, the rear shaft driven gear can be installed while the structure is simplified, and the rear drive, the differential four-wheel drive and the differential locking four-wheel drive are switched through the sliding power input gear; and secondly, the planetary gear is strengthened, and the differential mechanism is positioned at the high-speed end, so that the installation condition of the planetary gear is strengthened although the rotating speed difference between shafts is small, the shaft sleeve and the thrust shaft sleeve are respectively arranged at the inner end and the outer side of the planetary gear, and the friction force between the planetary gear and the planetary gear shaft frame and the planetary gear shaft is reduced.
The invention has stable performance, safety, reliability and compact structure, can realize the rear wheel drive of the transport vehicle when the transport vehicle runs on a light-load good road surface, adopts the front wheel drive when the transport vehicle runs on a light-load non-hard road surface, needs the differential four-wheel drive when the transport vehicle runs on a full-load good road surface, needs the differential locking four-wheel drive when the transport vehicle runs on a full-load non-hard road surface, is beneficial to improving the driving capability of the transport vehicle for field transportation and road transportation, prevents tires from slipping or sinking, and meets the requirements of different driving modes of various road conditions.
The technical scheme is that the rear drive shaft gear is provided with internal teeth and external teeth, the rear drive shaft gear can be internally meshed with the input shaft gear through the internal teeth, and the rear drive shaft gear is externally meshed with the rear shaft gear through the external teeth. Therefore, when the shifting fork shaft is at the rightmost rear-driving position, the input shaft gear and the rear-driving shaft are driven by the internal gear, so that the input shaft and the rear-driving shaft are coaxially connected, and independent rear driving can be realized.
The differential mechanism driven gear is fixed on a planetary gear shaft bracket through a driven gear bolt, the rear shaft assembly further comprises a rear shaft end cover bolt, a rear shaft sealing ring, a rear shaft clamping ring, a rear shaft angle contact bearing and a rear shaft end cover, the rear shaft driven gear is connected with a rear shaft through spline installation and limited with a rear shaft step through the rear shaft clamping ring, one end of the rear shaft is connected with a front shaft through a needle bearing, the other end of the rear shaft is fixedly connected with the rear shaft end cover through the rear shaft angle contact bearing, and the rear shaft end cover is fixedly connected on the box through the rear shaft end cover bolt; the front shaft assembly further comprises a front shaft sealing ring, a front shaft end cover bolt, a front shaft end cover, a front shaft clamping ring and a front shaft angle contact bearing, the front drive gear is arranged on the front shaft through a spline and limited with the front shaft step through the front shaft clamping ring, one end of the front shaft is connected with the rear shaft, the other end of the front shaft is fixedly connected with the front shaft end cover through the front shaft angle contact bearing, and the front shaft end cover is fixedly connected with the box body through the front shaft end cover bolt.
The input shaft assembly further comprises an input shaft end cover, an input shaft end cover bolt, an input shaft bearing and an input shaft sealing ring, wherein the input shaft gear is arranged on the input shaft through a spline, one end of the input shaft is provided with the input shaft bearing, the other end of the input shaft is connected with the rear drive shaft through a first needle bearing, the input shaft bearing is fixedly connected to the input shaft end cover, the input shaft end cover is fixedly connected with the box body through the input shaft end cover bolt, and the input shaft sealing ring is arranged in the input shaft end cover.
The shifting fork assembly further comprises a shifting fork shaft rear sleeve, a shifting fork shaft front sleeve, a shifting fork head, a shifting fork arm and a shifting fork head arm seat, wherein the shifting fork shaft rear sleeve is in threaded connection with the box body, the shifting fork shaft front sleeve is fixed on the box body through a shifting fork shaft front side bolt, two ends of the shifting fork shaft are respectively sleeved in the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve, the shifting fork head arm seat is fixedly connected to the shifting fork shaft, a shifting fork head arm is connected with the shifting fork head arm seat, the shifting fork head is installed on the box body and connected with the shifting fork head arm seat, and the shifting fork head can drive the shifting fork shaft to move along the axial direction of the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve.
When the shifting head is shifted, namely the shifting fork arm is shifted, the shifting fork shaft is driven to move along the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve, and then the shifting fork is driven to move, the input shaft gear slides along the axial direction of the input shaft under the action of the shifting fork, the input shaft gear can be meshed with the precursor gear at different positions of the input shaft and simultaneously meshed with the differential driven gear and the precursor gear, meshed with the differential driven gear and meshed with the rear driving shaft gear, so that power transmission at different positions is realized, and the working modes of independent precursor, differential locking four-wheel drive, differential four-wheel drive and independent rear drive are respectively completed.
Further technical scheme is that the shifting fork assembly comprises a gear shifting locking module, wherein the gear shifting locking module is used for limiting the shifting fork shaft to the preset positions of the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve. Therefore, the shifting fork shaft can be accurately stopped at the gear shifting position and is self-locked, the stopping and self-locking of the fixed positions of the shifting fork and the input shaft gear are realized, the fixed positions of the input shaft gear are the positions of the input shaft gear and the precursor gear on the input shaft, the positions of the input shaft gear and the precursor gear on the input shaft are meshed with the driven gear of the differential mechanism, the positions of the input shaft gear and the driven gear of the differential mechanism when the input shaft gear is meshed with the driven gear of the differential mechanism, and the positions of the input shaft gear and the rear drive shaft gear are meshed with each other.
The gear shifting locking module comprises a self-locking sleeve, a spring and a self-locking steel ball, wherein the spring and the self-locking steel ball are arranged in the self-locking sleeve, one end of the self-locking sleeve is opened, the opening end of the self-locking sleeve is fixedly connected with the front sleeve of the shifting fork shaft and is communicated with the front sleeve of the shifting fork shaft, a plurality of self-locking grooves matched with the self-locking steel ball are formed in the shifting fork shaft according to preset intervals, and the spring presses the self-locking steel ball on the shifting fork shaft. When the self-locking steel ball just falls into the self-locking groove, the self-locking is positioned and generated, when the external gear shifting acting force is greater than the self-locking force of the spring acting on the self-locking steel ball through the self-locking groove and the self-locking steel ball in the radial direction, the shifting fork shaft axially moves to drive the self-locking steel ball to move towards the spring, the spring is compressed, and when the shifting fork shaft continues to axially move, the compression amount of the spring is released to push the self-locking steel ball to fall into the next self-locking groove, so that gear shifting is realized. The invention has the advantages of small friction resistance and good gear shifting hand feeling in the whole gear shifting process. Preferably, the shifting fork shaft is provided with 4 self-locking grooves matched with the self-locking steel balls according to a preset interval, and the self-locking grooves are matched with four gears of an independent front drive, a differential locking four-drive, a differential four-drive and an independent rear drive.
Preferably, a limit bolt is arranged in the self-locking sleeve, and the spring is arranged on the limit bolt.
The rear drive assembly further comprises a rear drive shaft bearing, a rear drive shaft end cover bolt, a rear drive shaft sealing ring and a rear drive shaft end cover, wherein the rear drive shaft is provided with the rear drive shaft bearing, the other end of the rear drive shaft is connected with the input shaft through a first needle bearing, the rear drive shaft bearing is arranged on the rear drive shaft end cover, the rear drive shaft end cover is fixedly connected with the box body through the rear drive shaft end cover bolt, and the rear drive shaft sealing ring is arranged in the rear drive shaft end cover.
The technical scheme is that the precursor assembly further comprises a precursor end cover, a precursor shaft end cover bolt, a precursor shaft bearing, a precursor shaft sealing ring and a precursor shaft baffle ring, wherein the precursor shaft driven gear is arranged on the precursor shaft and positioned through the precursor shaft retainer ring and a shaft step, two ends of the precursor shaft are arranged on the precursor end cover through the precursor shaft bearing, the precursor end cover is fixedly connected with the box body through the precursor shaft end cover bolt, and the precursor shaft sealing ring is arranged in the precursor shaft end cover.
The further technical scheme is that the box assembly further comprises a box cover, a box bolt, an oil drain bolt, a shifting fork shaft cover plate and a cover plate bolt, wherein the oil drain bolt is arranged on the box, and the box cover and the shifting fork shaft cover plate are fixed on the box through the box bolt and the cover plate bolt respectively.
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 transfer case according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view of the transfer case of FIG. 1 taken along the H-H plane;
FIG. 3 is a cross-sectional view of the transfer case of FIG. 1 taken along the J-J plane;
FIG. 4 is a schematic diagram illustrating a connection structure between an input shaft assembly and a rear drive assembly according to an embodiment of the present invention;
FIG. 5 is a partial schematic view of a differential axle assembly according to an embodiment of the present invention;
FIG. 6 is a partial schematic view of a fork assembly according to one embodiment of the present invention;
FIG. 7 is a partial schematic view of a precursor assembly according to one embodiment of the present invention;
FIG. 8 is a schematic diagram of a transfer case single precursor state in accordance with one embodiment of the present invention;
FIG. 9 is a schematic diagram of a transfer case differential lock four-drive condition in accordance with one embodiment of the present invention;
FIG. 10 is a schematic diagram of a transfer case differential four-drive condition in accordance with one embodiment of the present invention;
fig. 11 is a schematic diagram of a differential four-drive transfer case in a single rear drive state according to an embodiment of the present invention.
In the figure:
a box component B input shaft component C rear drive component
D differential shaft assembly E precursor assembly F shifting fork assembly
A1 case lid A2 box bolt A3 box
A4 oil drain bolt A5 shifting fork shaft cover plate A6 cover plate bolt
B1 input shaft end cover B2 input shaft sealing ring B3 input shaft end cover bolt
B4 input shaft B5 input shaft bearing B6 input shaft gear
C1 rear drive shaft gear C2 rear drive shaft bearing C3 rear drive shaft end cover bolt
C4 rear drive shaft C5 rear drive shaft sealing ring C6 first needle bearing
C7 rear drive shaft end cover D1 rear shaft assembly D2 front shaft assembly
D3 differential assembly D11 rear axle gear D12 rear axle end cover
D13 rear shaft end cap bolt D14 rear shaft D15 rear shaft snap ring
D16 rear axle angle contact bearing D17 rear axle differential gear D21 front axle
D22 front shaft end cover bolt D23 front shaft end cover D24 front shaft angle contact bearing
D25 front axle snap ring D26 second needle bearing D27 front axle differential gear
D28 precursor gear D31 planetary gear shaft support D32 planetary gear shaft
D33 differential driven gear D34 driven gear bolt D35 planetary gear thrust sleeve
D36 planet gear D37 planet gear carrier sleeve D38 planet gear sleeve
Precursor shaft of D39 thrust shaft sleeve E1 precursor end cover E2 precursor shaft
E3 precursor shaft end cover bolt E4 precursor shaft bearing E5 precursor shaft sealing ring
E6 front drive shaft retainer ring E7 front drive shaft driven gear F1 shift fork shaft rear sleeve
F2 shifting fork shaft F3 spring F4 self-locking sleeve
F5 limit bolt F6 self-locking steel ball F7 self-locking groove
F8 shifting fork shaft front side bolt F9 shifting fork shaft front sleeve F10 shifting fork arm seat
F11 shift fork arm F12 shift fork F13 shift fork
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.
Referring to fig. 1 to 11, a differential and differential locking four-drive transfer case comprises a box body assembly a, an input shaft assembly B, a rear drive assembly C, a differential shaft assembly D, a front drive assembly E and a shift fork assembly F, wherein the box body assembly a at least comprises a box body A3, the input shaft assembly B, the rear drive assembly C, the differential shaft assembly D, the front drive assembly E and the shift fork assembly F are fixed on the box body A3, the input shaft assembly B at least comprises an input shaft B4 and an input shaft gear B6 arranged on the input shaft B4, the input shaft B4 can drive the input shaft gear B6 to rotate, the shift fork assembly F at least comprises a shift fork F12, the shift fork F12 is connected with the input shaft gear B6, the shift fork F12 can drive the input shaft gear B6 to slide along the axial direction of the input shaft B4, the front drive assembly E at least comprises a front drive shaft E2 and a front drive shaft driven gear E7 arranged on the front drive shaft E2, the shift fork assembly C comprises a rear drive shaft C4 and a needle roller pin C arranged on the rear drive shaft C4 and can be meshed with the input shaft C4 through a needle roller pin C4 and a needle roller pin C4 arranged on the input shaft C4; the differential shaft assembly D comprises a rear shaft assembly D1, a front shaft assembly D2 and a differential assembly D3, wherein the rear shaft assembly D1 at least comprises a rear shaft D14, a rear shaft gear D11 and a rear shaft differential gear D17; the front axle assembly D2 at least comprises a front axle D21, a front drive gear D28 and a front axle differential gear D27; the differential assembly D3 at least comprises a differential driven gear D33, a planetary gear shaft D32, a planetary gear shaft carrier D31, a planetary gear thrust shaft sleeve D35, a planetary gear D36, a planetary gear shaft carrier sleeve D37, a planetary gear shaft sleeve D38 and a thrust shaft sleeve D39; the front shaft D21 is connected with the rear shaft D14 through a second needle bearing D6, the differential driven gear D33 is fixed on the planetary gear shaft carrier D31, the planetary gear shaft carrier D31 is installed on the rear shaft D14 through a planetary gear shaft carrier sleeve D37 and can rotate along the rear shaft D14, the rear shaft differential gear D17 and the rear shaft gear D11 are arranged on the rear shaft D14, the rear shaft gear D11 is positioned on the outer side of the rear shaft differential gear D17, the rear shaft gear D11 is meshed with the rear driving shaft gear C1, the front shaft differential gear D27 and the front driving gear D28 are arranged on the front shaft D21, the front driving gear D28 is positioned on the outer side of the front shaft differential gear D27, the front driving gear D28 is meshed with the front driving gear E7, a thrust shaft sleeve D39 is respectively arranged between the planetary gear carrier D31 and the rear shaft differential gear D17 and the front shaft differential gear D27, and the thrust shaft differential gear D39 are respectively sleeved on the front shaft differential gear D21 and the front shaft differential gear D27; the planetary gear shaft carrier D31 is provided with a plurality of planetary gear shafts D32, the planetary gear shafts D32 are uniformly arranged along the circumferential direction of the differential driven gear D33 and are limited by the differential driven gear D33, the planetary gears D36 are arranged on the planetary gear shafts D32 through planetary gear shaft sleeves D38, a planetary gear thrust shaft sleeve D35 is arranged between the planetary gear shaft carrier D31 and the planetary gears D36, the planetary gear thrust shaft sleeve D35 is sleeved on the planetary gear shafts D32, and the planetary gear shaft carrier D31 and the planetary gears D36 are in contact with the planetary gear thrust shaft sleeve D35; the two sides of the planetary gear D36 are respectively meshed with a front axle differential gear D27 and a rear axle differential gear D17 to form a differential transmission system, and the input shaft gear B6 can be meshed with a differential driven gear D33 and/or a front drive gear D28.
Preferably, the number of the planet shafts D32 and the planet gears D36 arranged circumferentially is 2 or more and 4 or less.
In the specific application process, external power is transmitted to the input shaft B4, and is transmitted to the input shaft gear B6 through the input shaft B4, the shifting fork F12 drives the input shaft gear B6 to move along the input shaft B4, so that the input shaft gear B6 is meshed with the precursor gear D28, simultaneously meshed with the differential driven gear D33 and the precursor gear D28, meshed with the differential driven gear D33 and meshed with the rear drive shaft gear C1, and further power transmission at different positions is realized.
As shown in fig. 8, when the fork shaft F2 is at the leftmost precursor position, the input shaft gear B6 is only meshed with the precursor gear D28, the precursor gear D28 transmits power to the precursor shaft driven gear E7 meshed with the input shaft gear B, and the precursor shaft driven gear E7 drives the precursor shaft E2 to rotate, so that precursor is realized.
As shown in fig. 9, when the shift rail F2 is in the middle differential locking four-wheel drive position, the input shaft gear B6 is simultaneously meshed with the precursor gear D28 and the differential driven gear D33, the precursor gear D28 transmits power to the precursor shaft driven gear E7 meshed with the precursor gear D28, the precursor shaft driven gear E7 drives the precursor shaft E2 to rotate, so as to realize the precursor, the differential driven gear D33 transmits power to the planet gear shaft frame D31, then to the planet gear shaft D32 and the planet gear D36, and then to the rear shaft differential gear D17 and the rear shaft D14 through the planet gear D36, and then to the rear shaft gear C1 meshed with the rear shaft differential gear D36 through the rear shaft gear D11, so as to realize the rear drive; since the input shaft gear B6 is simultaneously meshed with the precursor gear D28 and the differential driven gear D33, the rotation speeds of the planetary gear shaft carrier D31 and the precursor shaft E2 are the same, and no differential is provided in the front-rear direction, and the differential locking four-wheel drive state is achieved.
As shown in fig. 10, in the intermediate differential four-drive position, the fork shaft F2 is engaged with the input shaft gear B6 only with the differential driven gear D33, the differential driven gear D33 transmits power to the planetary gear carrier D31, the planetary gear carrier D31 transmits power to the planetary gear shaft D32 and the planetary gear D36, respectively to the front shaft differential gear D27 and the rear shaft differential gear D17 through the planetary gear D36, and then to the front shaft D21 and the rear shaft D14, respectively to the front shaft driven gear E7 engaged with the front shaft driven gear E and the rear shaft driven gear C1 through the front shaft driven gear D28 and the rear shaft driven gear D11, respectively, and finally to the front shaft E2 and the rear shaft C4 to realize differential four-drive.
As shown in fig. 11, when the fork shaft F2 is at the rightmost rear-drive position, the teeth of the input shaft B4 are meshed with the rear-drive shaft gear C1 to transmit power to the rear-drive shaft C4 through the rear-drive shaft gear C1, so that the input shaft B4 and the rear-drive shaft C4 are coaxially connected, and separate rear-drive is realized.
The invention has stable performance, safety, reliability and compact structure, can realize rear wheel drive when the transportation vehicle is 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, needs differential four-wheel drive when the transportation vehicle is driven on a full-load good road surface, needs differential locking four-wheel drive when the transportation vehicle is driven on a full-load non-hard road surface, can obtain good driving capability, reduces transmission loss, and effectively improves the consumption of internal power flow of a driving system.
In another embodiment of the present invention, as shown in fig. 11, the rear drive shaft gear C1 is provided with internal teeth and external teeth, the rear drive shaft gear C1 may be internally meshed with the input shaft gear B6 through the internal teeth, and the rear drive shaft gear C1 may be externally meshed with the rear shaft gear D11 through the external teeth. In this way, when the shift fork shaft F2 is at the rightmost rear-drive position, the input shaft gear B6 and the rear-drive shaft C4 are driven by the internal gear, so that the input shaft B4 and the rear-drive shaft C4 are coaxially connected, and separate rear-drive can be realized.
In another embodiment of the present invention, as shown in fig. 5, the driven gear D33 of the differential is fixed on the planetary gear shaft frame D31 through a driven gear bolt D34, the rear shaft assembly D1 further includes a rear shaft cover bolt 13, a rear shaft D14 sealing ring, a rear shaft snap ring D15, a rear shaft angle contact bearing D16 and a rear shaft cover D12, the driven gear of the rear shaft D14 is connected with the rear shaft D14 through spline installation and is limited with the shaft step of the rear shaft D14 through the rear shaft snap ring D15, one end of the rear shaft D14 is connected with the front shaft D21 through a needle bearing, the other end of the rear shaft D14 is fixedly connected with the rear shaft cover D12 through a rear shaft angle contact bearing D16, and the rear shaft cover D12 is fixedly connected on the box body A3 through the rear shaft end cover bolt 13; the front axle assembly D2 further comprises a front axle D21 sealing ring, a front axle clamping ring D25, a front axle end cover bolt D22, a front axle end cover D23 and a front axle angle contact bearing D24, the front drive gear D28 is arranged on the front axle D21 through a spline and limited with a front axle step through the front axle clamping ring D25, one end of the front axle D21 is connected with the rear axle D14, the other end of the front axle D21 is fixedly connected with the front axle end cover D23 through the front axle angle contact bearing D24, and the front axle end cover D23 is fixedly connected with the box body A3 through the front axle end cover bolt D22.
Based on the above embodiment, in another embodiment of the present invention, as shown in fig. 4, the input shaft assembly B further includes an input shaft end cover B1, an input shaft end cover bolt B3, an input shaft bearing B5, and an input shaft seal ring B2, the input shaft gear B6 is disposed on the input shaft B4 through a spline, one end of the input shaft B4 is provided with the input shaft bearing B5, the other end is connected with the rear drive shaft C4 through a first needle bearing C6, the input shaft bearing B5 is fixedly connected to the input shaft end cover B1, the input shaft end cover B1 is fixedly connected with the box body A3 through the input shaft end cover bolt B3, and the input shaft seal ring B2 is disposed in the input shaft end cover B1.
In another embodiment of the present invention, as shown in fig. 1 and 6, the fork assembly F further includes a rear sleeve F1 of the fork shaft, a front sleeve F2 of the fork shaft, a shift knob F13, a knob arm F11 and a knob arm seat F10, the rear sleeve F1 of the fork shaft is in threaded connection with the box A3, the front sleeve F9 of the fork shaft is fixed on the box A3 by a bolt F8 on the front side of the fork shaft, two ends of the fork shaft F2 are respectively sleeved in the rear sleeve F1 of the fork shaft and the front sleeve F9 of the fork shaft, the knob arm seat F10 is fixedly connected to the rear sleeve F2 of the fork shaft, the knob arm F11 and the knob arm F12 are connected to the knob arm seat F10, the knob F13 is mounted on the box A3 and connected to the knob arm F11, and the knob F13 can drive the fork shaft F2 to move along the front sleeve F1 of the fork shaft and the front sleeve F9 of the fork shaft.
Thus, when the shifting fork F13 is shifted, namely the shifting fork arm F11 is shifted, the shifting fork shaft F2 is driven to move along the shifting fork shaft rear sleeve F1 and the shifting fork shaft front sleeve F9, and then the shifting fork F12 is driven to move, the input shaft gear B6 slides along the axial direction of the input shaft B4 under the action of the shifting fork F12, the input shaft gear B6 can be meshed with the precursor gear D28 at different positions of the input shaft B4, and simultaneously meshed with the differential driven gear D33 and the precursor gear D28, meshed with the differential driven gear D33 and meshed with the rear drive shaft gear C1, so that power transmission at different positions is realized, and the working modes of independent precursor, differential locking four-wheel drive, differential four-wheel drive and independent rear drive are respectively completed.
In another embodiment of the present invention, as shown in fig. 6, the shift fork assembly F includes a shift lock module for defining the shift fork shaft F2 at a predetermined position of the shift fork shaft rear sleeve F1 and the shift fork shaft front sleeve F9. Thus, the shifting fork shaft F2 is ensured to be accurately stopped at a gear shifting position and self-locked, and the stopping and self-locking of the fixed positions of the shifting fork F12 and the input shaft gear B6 are realized, wherein the fixed positions of the input shaft gear B6 are the positions of the input shaft gear B6 on the input shaft B4, which are the positions of the input shaft gear B6 on the input shaft B4 when the input shaft gear B6 is meshed with the precursor gear D28, the positions of the input shaft B4 when the input shaft gear B6 is meshed with the differential driven gear D33 and the precursor gear D28, and the positions of the input shaft gear B4 when the input shaft gear B6 is meshed with the rear drive shaft gear C1.
Based on the above embodiment, in another embodiment of the present invention, as shown in fig. 6, the shift locking module includes a self-locking sleeve F4, a spring F3 and a self-locking steel ball F6 disposed in the self-locking sleeve F4, one end of the self-locking sleeve F4 is opened, the open end of the self-locking sleeve F4 is fixedly connected with the front sleeve F9 of the shift fork and is communicated with the front sleeve F9 of the shift fork, a plurality of self-locking grooves F7 matched with the self-locking steel ball F6 are disposed on the shift fork shaft F2 at predetermined intervals, and the spring F3 presses the self-locking steel ball F6 on the shift fork shaft F2. When the self-locking steel ball F6 just falls into the self-locking groove F7, the self-locking is positioned and generated, when the external gear shifting acting force is larger than the self-locking force of the spring F3 acting on the self-locking steel ball F6 in the radial direction through the self-locking groove F7 and the self-locking steel ball F6 during gear shifting, the shifting fork shaft F2 axially moves to drive the self-locking steel ball F6 to move towards the spring F3, the spring F3 is compressed, and when the shifting fork shaft F2 continues to axially move, the compression amount of the spring F3 is released to push the self-locking steel ball F6 to fall into the next self-locking groove F7, so that gear shifting is realized. The invention has the advantages of small friction resistance and good gear shifting hand feeling in the whole gear shifting process. Preferably, the shift fork shaft F2 is provided with 4 self-locking grooves F7 matched with the self-locking steel balls F6 at predetermined intervals, and the self-locking grooves are matched with four gears of an independent front drive, a differential locking four-drive, a differential four-drive and an independent rear drive.
In another embodiment of the present invention, as shown in fig. 6, a limit bolt F5 is disposed in the self-locking sleeve F4, and the spring F3 is disposed on the limit bolt F5.
In another embodiment of the present invention, as shown in fig. 4, the rear drive assembly C further includes a rear drive shaft bearing C2, a rear drive shaft cover bolt C3, a rear drive shaft seal ring C5, and a rear drive shaft cover C7, the rear drive shaft C4 is provided with the rear drive shaft bearing C2, the other end is connected with the input shaft B4 through a first needle bearing C6, the rear drive shaft bearing C2 is disposed on the rear drive shaft cover C7, the rear drive shaft cover C7 is fixedly connected with the box A3 through the rear drive shaft cover bolt C3, and the rear drive shaft seal ring C5 is disposed in the rear drive shaft cover C7.
In another embodiment of the present invention, as shown in fig. 7, the precursor assembly E further includes a precursor end cap E1, a precursor end cap bolt E3, a precursor shaft bearing E4, a precursor shaft sealing ring E5 and a precursor shaft retainer E6, the precursor shaft driven gear E7 is disposed on the precursor shaft E2 and is positioned by the precursor shaft retainer E6 and the shaft steps, two ends of the precursor shaft E2 are disposed on the precursor end cap E1 by the precursor shaft bearing E4, the precursor end cap E1 is fixedly connected with the box A3 by the precursor end cap bolt E3, and the precursor shaft sealing ring E5 is disposed in the precursor shaft E2 end cap.
In another embodiment of the present invention, as shown in fig. 1 to 3, the box assembly a further includes a box cover A1, a box bolt A2, an oil drain bolt A4, a fork shaft cover plate A5 and a cover plate bolt A6, wherein the oil drain bolt A4 is disposed on the box A3, and the box cover A1 and the fork shaft cover plate A5 are fixed on the box A3 through the box bolt A2 and the cover plate bolt A6, respectively.
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 (7)
1. The differential and differential locking four-drive transfer case is characterized by comprising a case body assembly, an input shaft assembly, a rear drive assembly, a differential shaft assembly, a front drive assembly and a shifting fork assembly, wherein the case body assembly at least comprises a case body, the input shaft assembly, the rear drive assembly and the shifting fork assembly are fixed on the case body, the input shaft assembly at least comprises an input shaft and an input shaft gear arranged on the input shaft, the input shaft can drive the input shaft gear to rotate, the shifting fork assembly at least comprises a shifting fork, the shifting fork is connected with the input shaft gear, the shifting fork can drive the input shaft gear to slide along the axial direction of the input shaft, the front drive assembly at least comprises a front drive shaft and a front drive shaft driven gear arranged on the front drive shaft, the rear drive assembly at least comprises a rear drive shaft and a rear drive shaft gear arranged on the rear drive shaft, the rear drive shaft is connected with the input shaft through a first needle bearing, and the input shaft gear can be meshed with the rear drive shaft gear; the differential shaft assembly comprises a rear shaft assembly, a front shaft assembly and a differential assembly, wherein the rear shaft assembly at least comprises a rear shaft, a rear shaft gear and a rear shaft differential gear; the front axle assembly at least comprises a front axle, a front drive gear and a front axle differential gear; the differential assembly at least comprises a differential driven gear, a planetary gear shaft carrier, a planetary gear thrust shaft sleeve, a planetary gear shaft carrier shaft sleeve, a planetary gear shaft sleeve and a thrust shaft sleeve; the front shaft is connected with the rear shaft through a second 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 rear shaft gear is positioned on the outer side of the rear shaft differential gear, the rear shaft gear is meshed with the rear driving shaft gear, the front shaft differential gear and the front driving gear are arranged on the front shaft, the front driving gear is positioned on the outer side of the front shaft differential gear, the front driving gear is meshed with the front driving shaft driven gear, a thrust shaft sleeve is respectively arranged between the planetary gear shaft frame and the rear shaft differential gear and between the planetary gear shaft frame and the front shaft differential gear, and the thrust shaft sleeve is respectively sleeved on the front shaft and the rear shaft, and the planetary gear shaft frame, the rear shaft differential gear and the front shaft differential gear are contacted with the thrust shaft sleeve; the planetary gear shaft frame is provided with a plurality of planetary gear shafts which are uniformly arranged along the circumferential direction of the differential driven gear and are limited by the differential driven gear, the planetary gears are arranged on the planetary gear shafts through planetary gear shaft sleeves, a planetary gear thrust shaft sleeve is arranged between the planetary gear shaft frame and the planetary gears, the planetary gear thrust shaft sleeve is sleeved on the planetary gear shafts, and the planetary gear shaft frame and the planetary gears are in contact with the planetary gear thrust shaft sleeve; the two sides of the planetary gear are respectively meshed with the front axle differential gear and the rear axle differential gear to form a differential transmission system, and the input axle gear can be meshed with the driven gear and/or the precursor gear of the differential mechanism; the shifting fork assembly further comprises a shifting fork shaft rear sleeve, a shifting fork shaft and a shifting fork shaft front sleeve, a shifting fork head, a shifting fork arm and a shifting fork head arm seat, the shifting fork shaft rear sleeve is in threaded connection with the box body, the shifting fork shaft front sleeve is fixed on the box body through a shifting fork shaft front side bolt, two ends of the shifting fork shaft are respectively sleeved in the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve, the shifting fork head arm seat is fixedly connected to the shifting fork shaft, the shifting fork head arm and the shifting fork are connected with the shifting fork head arm seat, the shifting fork head can drive the shifting fork shaft to move along the axial direction of the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve, the shifting fork assembly comprises a shifting fork locking module, the shifting fork locking module is used for limiting the shifting fork shaft rear sleeve and the shifting fork shaft front sleeve to preset positions, the shifting fork shaft rear sleeve comprises a self-locking sleeve, the self-locking sleeve is fixedly connected to the shifting fork shaft front sleeve, the self-locking sleeve is arranged on the shifting fork shaft front sleeve, the self-locking sleeve is fixedly connected with the shifting fork shaft front sleeve is provided with the self-locking sleeve, the self-locking sleeve is provided with a plurality of self-locking steel balls, the self-locking sleeve is matched with the self-locking sleeve, and the self-locking sleeve is matched with the self-locking sleeve through the self-locking steel ball.
2. The differential and differential locked four-drive transfer case of claim 1 wherein the rear drive shaft gear is provided with internal teeth and external teeth, the rear drive shaft gear being internally meshable with the input shaft gear by internal teeth, the rear drive shaft gear being externally meshable with the rear shaft gear by external teeth.
3. The differential and differential locked four-drive transfer case of claim 1 wherein the differential driven gear is secured to a planetary gear shaft mount by a driven gear bolt, the rear shaft assembly further comprises a rear shaft cover bolt, a rear shaft seal ring, a rear shaft snap ring, a rear shaft angular contact bearing and a rear shaft cover, the rear shaft driven gear is splined to the rear shaft and is limited by the rear shaft snap ring and a rear shaft step, one end of the rear shaft is connected to the front shaft by a needle bearing, the other end is fixedly connected to the rear shaft cover by a rear shaft angular contact bearing, and the rear shaft cover is fixedly connected to the case by a rear shaft end cover bolt; the front shaft assembly further comprises a front shaft sealing ring, a front shaft end cover bolt, a front shaft end cover, a front shaft clamping ring and a front shaft angle contact bearing, the front drive gear is arranged on the front shaft through a spline and limited with the front shaft step through the front shaft clamping ring, one end of the front shaft is connected with the rear shaft, the other end of the front shaft is fixedly connected with the front shaft end cover through the front shaft angle contact bearing, and the front shaft end cover is fixedly connected with the box body through the front shaft end cover bolt.
4. The differential and differential locking four-wheel drive transfer case according to claim 3, wherein the input shaft assembly further comprises an input shaft end cover, an input shaft end cover bolt, an input shaft bearing and an input shaft sealing ring, the input shaft gear is arranged on the input shaft through a spline, one end of the input shaft is provided with the input shaft bearing, the other end of the input shaft is connected with the rear drive shaft through a first needle bearing, the input shaft bearing is fixedly connected to the input shaft end cover, the input shaft end cover is fixedly connected with the case body through the input shaft end cover bolt, and the input shaft sealing ring is arranged in the input shaft end cover.
5. The differential and differential locking four-drive transfer case according to any one of claims 1-4, wherein the rear drive assembly further comprises a rear drive shaft bearing, a rear drive shaft cover bolt, a rear drive shaft sealing ring and a rear drive shaft cover, the rear drive shaft is provided with the rear drive shaft bearing, the other end of the rear drive shaft is connected with the input shaft through a first needle bearing, the rear drive shaft bearing is arranged on the rear drive shaft cover, the rear drive shaft cover is fixedly connected with the case body through the rear drive shaft cover bolt, and the rear drive shaft sealing ring is arranged in the rear drive shaft cover.
6. The differential and differential locking four-drive transfer case according to claim 5, wherein the precursor assembly further comprises a precursor end cover, a precursor shaft end cover bolt, a precursor shaft bearing, a precursor shaft sealing ring and a precursor shaft retainer ring, the precursor shaft driven gear is arranged on the precursor shaft and positioned through the precursor shaft retainer ring and the shaft steps, two ends of the precursor shaft are arranged on the precursor end cover through the precursor shaft bearing, the precursor end cover is fixedly connected with the case body through the precursor shaft end cover bolt, and the precursor shaft sealing ring is arranged in the precursor shaft end cover.
7. The differential and differential locked four-drive transfer case of claim 6, wherein the case assembly further comprises a case cover, case bolts, oil drain bolts, a fork shaft cover plate, and cover plate bolts, the oil drain bolts being disposed on the case, the case cover and the fork shaft cover plate being secured to the case by the case bolts and the cover plate bolts, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810481707.7A CN108443495B (en) | 2018-05-18 | 2018-05-18 | Differential and differential locking four-wheel drive transfer case |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810481707.7A CN108443495B (en) | 2018-05-18 | 2018-05-18 | Differential and differential locking four-wheel drive transfer case |
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| CN108443495A CN108443495A (en) | 2018-08-24 |
| CN108443495B true CN108443495B (en) | 2024-04-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110466349A (en) * | 2019-08-08 | 2019-11-19 | 山东五征集团有限公司 | Time sharing commercial vehicle transfer case with differential limitation |
| CN112413079A (en) * | 2020-11-04 | 2021-02-26 | 长沙桑铼特农业机械设备有限公司 | Transfer case and agricultural machine |
| CN114537134B (en) * | 2022-03-15 | 2023-07-25 | 中国第一汽车股份有限公司 | Transfer case and vehicle |
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| CN108443495A (en) | 2018-08-24 |
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