CN107166008B - Differential mechanism of transfer case - Google Patents

Differential mechanism of transfer case Download PDF

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Publication number
CN107166008B
CN107166008B CN201710461982.8A CN201710461982A CN107166008B CN 107166008 B CN107166008 B CN 107166008B CN 201710461982 A CN201710461982 A CN 201710461982A CN 107166008 B CN107166008 B CN 107166008B
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Prior art keywords
differential
connecting disc
assembly
gear
front output
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CN107166008A (en
Inventor
高丽丽
葛铠
张庆
赵娟
张磊
谷捷
单红波
李洪彪
刘懿敏
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China Academy of Launch Vehicle Technology CALT
Beijing Institute of Space Launch Technology
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China Academy of Launch Vehicle Technology CALT
Beijing Institute of Space Launch Technology
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Priority to CN201710461982.8A priority Critical patent/CN107166008B/en
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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
    • 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
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/344—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having a transfer gear
    • B60K17/346—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having a transfer gear the transfer gear being a differential gear
    • B60K17/3462—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having a transfer gear the transfer gear being a differential gear with means for changing distribution of torque between front and rear wheels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Retarders (AREA)

Abstract

The invention relates to a differential mechanism of a transfer case, which comprises a shell, a front output assembly, a rear output assembly and a planetary gear assembly, wherein a transmission gear is arranged on the peripheral wall of the shell, the front output assembly comprises a front output shaft and a front output gear arranged at the right end of the front output shaft, the rear output assembly comprises a rear output shaft and an inner gear ring arranged at the left end of the rear output shaft, the planetary gear assembly comprises a left connecting disc, a right connecting disc and a plurality of planetary gears, two ends of each planetary gear are sleeved with a bushing and correspondingly arranged in planetary gear mounting holes arranged on the left connecting disc and the right connecting disc, the front output gear of the front output assembly is meshed with the plurality of planetary gears, the front output shaft of the front output assembly extends out of the left side of the left connecting disc, the inner gear ring of the rear output assembly is meshed with the plurality of planetary gears, the shell is sleeved on the outer side of the inner gear ring and is fixedly connected with the left connecting disc, and the rear output shaft of the rear output assembly extends out of the right side of the shell. The device has the advantages of compact structure, flexible action and high reliability.

Description

Differential mechanism of transfer case
Technical Field
The invention relates to a transmission device, in particular to an interaxle differential mechanism applied to a transfer case.
Background
In the automotive field, transfer cases are used in chassis transmission systems of multi-axle drive vehicles, which distribute input power among axles and output power to their front and rear drive axles, respectively. The performance parameters and reliability of the transfer case directly influence the dynamic property and safety of a transmission system and belong to key components of a chassis transmission system. Each driving axle of the vehicle can be subjected to torque distribution through a differential of the transfer case, the torque distribution ratio (referred to as a torque distribution ratio) is an important performance parameter, and the appropriate torque distribution ratio of the differential of the transfer case can more effectively utilize the ground adhesion of each driving axle according to various arrangement forms of a vehicle chassis, so that the dynamic property of the vehicle is fully exerted. At present, a differential mechanism of a vehicle transfer case adopted in the field is mainly in a planetary transmission mode, and the torque-division ratio is generally larger than 2.2 due to the influences of limited bearing capacity of a planetary gear needle bearing, insufficient strength of a planetary gear and other factors in the structural design. This results in a limited range of use, and the ground adhesion of each transaxle of the multi-axle vehicle cannot be effectively utilized, and the dynamic performance of the vehicle cannot be fully exerted.
Disclosure of Invention
The invention aims to provide a differential mechanism of a transfer case, which has the advantages of compact structure, convenient use, flexible action and high reliability, can effectively utilize the ground adhesion of front and rear drive axles, and fully exerts the dynamic property of an automobile.
In order to solve the problems that the torque-dividing ratio of a transfer case differential mechanism is larger than 2.2 and the dynamic performance of a vehicle cannot be fully exerted due to the influences of factors such as limited bearing capacity of a planetary gear needle bearing, insufficient strength of a planetary gear and the like in the prior art, the invention provides the transfer case differential mechanism which comprises a shell, a front output assembly, a rear output assembly and a planetary gear assembly, wherein a transmission gear is arranged on the peripheral wall of the shell, and the front output assembly comprises a front output shaft and a front output gear arranged at the right end of the front output shaft; the rear output assembly comprises a rear output shaft and an inner gear ring arranged at the left end of the rear output shaft; the planetary gear assembly comprises a left connecting disc and a right connecting disc, a plurality of connecting columns are circumferentially distributed on the right side surface of the left connecting disc, the right connecting disc is fixedly connected with the right ends of the connecting columns, a plurality of planetary gears are circumferentially distributed between the left connecting disc and the right connecting disc, and bushings are sleeved at two ends of each planetary gear and are correspondingly arranged in planetary gear mounting holes formed in the left connecting disc and the right connecting disc; the front output gear of the front output assembly is arranged on the inner sides of the plurality of planetary gears and is meshed with the plurality of planetary gears, the front output shaft of the front output assembly extends out of the left side of the left connecting disc, the inner gear ring of the rear output assembly is sleeved on the outer sides of the plurality of planetary gears and is meshed with the plurality of planetary gears, the shell is sleeved on the outer side of the inner gear ring of the rear output assembly and is fixedly connected with the left connecting disc of the planetary gear assembly, and the rear output shaft of the rear output assembly extends out of the right side of the shell.
Further, the invention discloses a differential mechanism of a transfer case, wherein a short sleeve is further arranged on the left side of a left connecting disc of a planetary gear assembly; a front output shaft of the front output assembly is also provided with a sun gear, and the sun gear is positioned on the left side of the short sleeve; the differential lock assembly comprises a sliding meshing sleeve, a differential shifting fork and a driving device connected with the differential shifting fork; the sliding meshing sleeve is sleeved on the sun wheel and enables the sun wheel and the sun wheel to be in sliding fit, and the left side of the short sleeve and the right side of the sliding meshing sleeve are provided with mutually matched joint teeth.
Furthermore, the invention discloses a differential mechanism of a transfer case, wherein the driving device comprises a differential shifting fork shaft, a differential piston, a differential screw plug, a differential cylinder end cover, a differential nut, a differential spring and a differential stop block.
Further, the differential mechanism of the transfer case is characterized in that the right connecting disc is fixedly connected with the connecting columns through bolts, specifically, first threaded holes are formed in the connecting columns, first through holes corresponding to the first threaded holes are formed in the right connecting disc, and a plurality of first hinge bolts correspondingly penetrate through the first through holes of the right connecting disc and are screwed in the first threaded holes of the connecting columns.
Further, the differential mechanism of the transfer case is characterized in that the shell is fixedly connected with the left connecting disc through bolts, specifically, a plurality of second threaded holes distributed along the circumferential direction are formed in the left end of the shell, second through holes corresponding to the second threaded holes are formed in the left connecting disc, and a plurality of second hinge bolts correspondingly penetrate through the second through holes of the left connecting disc and are screwed in the second threaded holes of the shell.
Further, the shell is connected with the left connecting disc through a plurality of pins distributed along the circumferential direction.
Further, the invention relates to a differential mechanism of a transfer case, wherein the bushing is made of low-carbon steel, and bronze alloy is sintered on the surface of the bushing.
Furthermore, one end of the bush is provided with an outward flange, and the outward flanges of the bush in the planetary gear mounting holes on the left connecting disc and the right connecting disc are correspondingly pressed on the port wall of the planetary gear mounting hole relative to the planetary gear.
Compared with the prior art, the differential mechanism of the transfer case has the following advantages: the invention arranges a shell, a front output component, a rear output component and a planetary gear component, and arranges a transmission gear on the peripheral wall of the shell. Let preceding output assembly include preceding output shaft and set up in the preceding output gear of preceding output shaft right-hand member. Let back output assembly include back output shaft and set up the ring gear in back output shaft left end. Let the planetary gear subassembly include left connection pad and right connection pad, set up a plurality of spliced poles that distribute along circumference at the right flank of left connection pad, let the right-hand member fixed connection of right connection pad and a plurality of spliced poles, set up a plurality of planetary gear who distributes along circumference between left connection pad and right connection pad, let planetary gear all overlap at both ends and establish the bush and make the bush correspondence at both ends install in the planetary gear mounting hole that sets up on left connection pad and right connection pad. The front output gear of the front output assembly is arranged on the inner side of the plurality of planetary gears and is meshed with the plurality of planetary gears, and the front output shaft of the front output assembly extends out of the left side of the left connecting disc. The inner gear ring of the rear output assembly is sleeved on the outer sides of the plurality of planetary gears and the inner gear of the rear output assembly is meshed with the plurality of planetary gears. The shell is sleeved outside the inner gear ring of the rear output assembly, the left end of the shell is fixedly connected with the left connecting disc of the planetary gear assembly, and the rear output shaft of the rear output assembly extends out of the right side of the shell. Therefore, the transfer case differential mechanism with compact structure, convenient use, flexible action and high reliability is formed. According to the planetary gear type torque distribution mechanism, the planetary gear is correspondingly arranged in the planetary gear mounting holes in the left connecting disc and the right connecting disc through the bushings sleeved at the two ends, so that the clearance between the planetary gear and the planetary gear mounting holes can be effectively reduced, the limitation of a planetary gear needle roller bearing on the structure is avoided, and the technical purpose of reducing the torque distribution ratio can be realized under the condition of ensuring the bearing capacity. Practical application shows that the torque-dividing ratio of the transfer case differential mechanism can reach 2-2.2 by adopting the invention, the ground adhesion of front and rear drive axles can be more effectively utilized, and the dynamic property of an automobile is fully exerted.
A transfer case differential mechanism according to the present invention is described in further detail with reference to the embodiments shown in the drawings:
drawings
FIG. 1 is a perspective view of a first embodiment of a transfer case differential mechanism of the present invention;
FIG. 2 is a front view of a first embodiment of a transfer case differential mechanism of the present invention;
FIG. 3 is a cross-sectional view of a first embodiment of a transfer case differential mechanism of the present invention;
FIG. 4 is an exploded view of a first embodiment of a transfer case differential mechanism of the present invention;
FIG. 5 is a front view of a planetary gear assembly of the first embodiment of a transfer case differential mechanism of the present invention;
FIG. 6 is a perspective view of a planetary gear assembly of the first embodiment of a transfer case differential mechanism of the present invention;
FIG. 7 is a perspective view of a second embodiment of a transfer case differential mechanism of the present invention;
FIG. 8 is a front view of a second embodiment of a transfer case differential mechanism of the present invention;
FIG. 9 is a left side elevational view of the differential lock assembly of the second embodiment of the transfer case differential mechanism of the present invention;
fig. 10 is a cross-sectional view of a differential lock assembly in a second embodiment of a transfer case differential mechanism of the present invention.
Detailed Description
First, it should be noted that the terms of orientation such as front, back, left, right, and the like in the present invention are only illustrated according to the drawings and are for convenience of understanding, and do not limit the technical solution of the present invention.
A first embodiment of a transfer case differential mechanism of the present invention, as shown in fig. 1-6, includes a housing 1, a front output assembly 2, a rear output assembly 3, and a planetary gear assembly 4. A transmission gear 11 is provided on the outer peripheral wall of the housing 1. The front output assembly 2 is provided with a front output shaft 21 and a front output gear 22 fixed to the right end of the front output shaft 21. The rear output assembly 3 is provided with a rear output shaft 31 and an inner ring gear 32 fixed to the left end of the rear output shaft. The planetary gear assembly 4 is provided with a left connecting disc 41 and a right connecting disc 42, five connecting columns 43 distributed along the circumferential direction are arranged on the right side surface of the left connecting disc 41, the right connecting disc 42 is fixedly connected with the right ends of the five connecting columns 43, five planetary gears 44 distributed along the circumferential direction are arranged between the left connecting disc 41 and the right connecting disc 42, and the planetary gears 44 are sleeved with bushings 45 at two ends and the bushings 45 at the two ends are correspondingly arranged in planetary gear mounting holes arranged on the left connecting disc 41 and the right connecting disc 42. Meanwhile, the front output gear 22 of the front output assembly 2 is placed inside the five planetary gears 44 and is meshed with the five planetary gears 44, and the front output shaft 21 of the front output assembly 2 is made to protrude from the left side of the left connecting plate 41. The inner gear ring 32 of the rear output component 3 is sleeved on the outer sides of the five planetary gears 44, and the inner gear of the rear output component is meshed with the five planetary gears 44. The casing 1 is sleeved outside the ring gear 32 of the rear output assembly 3, the left end of the casing is fixedly connected with the left connecting disc 41 of the planetary gear assembly 4, and the rear output shaft 31 of the rear output assembly 3 extends out of the right side of the casing 1.
The transfer case differential mechanism with compact structure, convenient use, flexible action and high reliability is formed by the structural arrangement. According to the invention, by adopting the planet row type torque distribution mechanism and correspondingly installing the planet gears 44 in the planet gear installation holes on the left connecting disc 41 and the right connecting disc 42 through the bushings 45 sleeved at the two ends, the clearance between the planet gears 44 and the planet gear installation holes can be effectively reduced, the limitation of a planet gear needle roller bearing on the structure is avoided, and the technical purpose of reducing the torque distribution ratio can be realized under the condition of ensuring the bearing capacity. Practical application shows that the torque-dividing ratio of the differential mechanism of the transfer case can reach 2.0-2.2, the ground adhesion of front and rear drive axles can be more effectively utilized, and the dynamic performance of a vehicle can be fully exerted. In a specific application, the bushing 45 is generally made of low-carbon steel, bronze alloy is sintered on the surface of the bushing 45, and an oil passage is machined on the surface of the bronze alloy as required, so that the lubricating effect is improved, and the abrasion is reduced. It should be noted that, in the present invention, the number of the connecting columns 43 and the number of the planetary gears 44 are not limited to five, and the technical purpose of the present invention can be achieved by providing more than three connecting columns, and the five connecting columns and the five planetary gears can ensure the connection stability and the transmission smoothness, thereby improving the operational reliability of the differential mechanism.
As an optimized scheme, in the present embodiment, the right connecting disc 42 is bolted to the plurality of connecting posts 43. Specifically, a plurality of connecting posts 43 are provided with first threaded holes, a right connecting plate 42 is provided with first through holes corresponding to the first threaded holes, and a plurality of first hinge bolts correspondingly penetrate through the first through holes of the right connecting plate 42 and are screwed in the first threaded holes of the connecting posts 43. The arrangement can improve the convenience of disassembly and assembly operation and is beneficial to detection and maintenance. It should be noted that the fixing connection mode of the right connecting disc 42 and the plurality of connecting posts 43 is not limited to bolting, and other fixing modes can be adopted, and the technical purpose of the present invention can be achieved. Similarly, the present embodiment uses a bolt connection to fixedly connect the housing 1 and the left connection plate 41. Specifically, a plurality of second threaded holes distributed along the circumferential direction are formed in the left end of the shell 1, second through holes corresponding to the second threaded holes are formed in the left connecting disc 41, and a plurality of second hinge bolts correspondingly penetrate through the second through holes of the left connecting disc 41 and are screwed into the second threaded holes of the shell 1. Furthermore, the present embodiment also allows the housing 1 to be connected to the left connecting plate 41 by a plurality of pins distributed along the circumferential direction, so as to enhance the connection stability between the two. In addition, the present embodiment provides the bushing 45 with a flange at one end. In a specific application, the bushings 45 in the planetary gear mounting holes on the left connecting disc 41 and the right connecting disc 42 are mounted so that the flanges thereof are correspondingly pressed against the port walls of the planetary gear mounting holes opposite to the planetary gears 44. This structure can prevent the planetary gear 44 from directly contacting with the left and right connecting discs 41 and 42 during operation, and ensure the smoothness of the movement of the planetary gear 44 and the reliability of the differential mechanism.
As shown in fig. 7 to 10, a second embodiment of the differential mechanism of the transfer case according to the present invention is different from the first embodiment in that the left connecting plate 41 of the planetary gear assembly 4 is provided with a short sleeve 46 on the left side thereof, and the sun gear 23 is provided on the front output shaft 21 of the front output assembly 2 with the sun gear 23 on the left side of the short sleeve 46. Meanwhile, a differential lock assembly 5 is provided, so that the differential lock assembly 5 comprises a sliding engaging sleeve 51, a differential shift fork 52 and a driving device connected with the differential shift fork 52. The sliding sleeve 51 is fitted over the sun gear 23 and is slidably fitted thereto, and mutually fitting engaging teeth are provided on the left side of the short sleeve 46 and the right side of the sliding sleeve 51. By arranging the differential lock assembly 5, when the engaging teeth on the short sleeve 46 and the sliding engaging sleeve 51 are engaged with each other, the housing 1, the front output assembly 2, the rear output assembly 3 and the planetary gear assembly 4 can be locked and synchronously rotated, and an effective anti-skidding function can be achieved. The driving device specifically comprises a differential shifting fork shaft 53, a differential piston 54, a differential screw plug 55, a differential cylinder end cover 56, a differential nut 57, a differential spring 58 and a differential stop 59. The differential shifting fork 52 is matched with the groove of the sliding meshing sleeve 51 through a sliding block of the differential shifting fork 52, and drives the sliding meshing sleeve 51 to axially move; meanwhile, the differential shifting fork 52 drives the differential piston 54 to axially move on the differential shifting fork shaft 53; the differential spring 58 is installed between the differential stop 59 and the differential fork 52, and plays a role of self-return. The right end of the differential shifting fork shaft 53 is positioned by a differential stop block 59, and the left end of the differential shifting fork shaft is positioned by a differential screw plug 55, a differential cylinder end cover 56 and a differential nut 57 in a triple mode. Differential plug screw 55 relies on threaded connection with differential declutch shift shaft 53, and differential cylinder end cover 56 relies on threaded connection with differential plug screw 55, and differential nut 57 also relies on threaded connection with differential plug screw 55, and reliable fastening effect not only can be guaranteed to triple threaded connection, but also the axial distance of adjustable differential lock has strengthened its adaptability simultaneously, has strengthened the practicality. It should be noted that the differential lock assembly 5 is not limited to the above-described arrangement, and may also take other equivalent or similar structural forms.
To assist those skilled in the art in understanding the present invention, a brief description of the operation of a transfer case differential mechanism of the present invention is provided below: when the differential mechanism is assembled and used, the transmission gear 11 on the shell 1 is meshed with a power output gear on an output shaft of the transfer case, the power output by the transfer case is transmitted to the planetary gear assembly 4 through the shell 1, under the differential working condition, the planetary gear 44 of the planetary gear assembly 4 rotates along with the shell 1 while revolving, when the planetary gear 44 rotates, on one hand, the power is output to the front output shaft 21 of the front output assembly 2 through the front output gear 22 meshed with the planetary gear, on the other hand, the power is output to the rear output shaft 31 of the rear output assembly 3 through the inner gear ring 32 meshed with the planetary gear, and the power is output to a front end drive axle and a rear end drive axle through the front output shaft 21 and the rear output shaft 31 correspondingly. Because the meshing rotating radiuses of the output gear 22 and the inner gear ring 32 and the planetary gear assembly 4 are different, the purpose of differential transmission is achieved. Under the condition that a front end drive axle and a rear end drive axle slip, the drive device of the differential lock assembly 5 drives the engaging teeth on the sliding engaging sleeve 51 to be engaged with the engaging teeth on the short sleeve 46 of the left connecting disc 41, so that the front output assembly 2 and the shell 1 are combined into a whole, and the front output assembly 2 and the rear output assembly 3 synchronously rotate along with the shell 1 because the front output gear 22 of the front output assembly 2 and the inner gear ring 32 of the rear output assembly 3 are respectively engaged with the planetary gears 44 of the planetary gear assembly 4, and at the moment, the planetary gears 44 of the planetary gear assembly 4 only rotate along with the shell 1 without rotating, so that the purpose of differential locking is realized, and the effective anti-slip effect can be achieved.
The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by the skilled in the art according to the technical solution of the present invention should fall within the scope of the invention defined by the claims without departing from the spirit of the present invention.

Claims (7)

1. A differential mechanism of a transfer case comprises a shell (1), a front output assembly (2), a rear output assembly (3) and a planetary gear assembly (4), and is characterized in that a transmission gear (11) is arranged on the peripheral wall of the shell (1), and the front output assembly (2) comprises a front output shaft (21) and a front output gear (22) arranged at the right end of the front output shaft (21); the rear output assembly (3) comprises a rear output shaft (31) and an inner gear ring (32) arranged at the left end of the rear output shaft; the planetary gear assembly (4) comprises a left connecting disc (41) and a right connecting disc (42), a plurality of connecting columns (43) distributed along the circumferential direction are arranged on the right side surface of the left connecting disc (41), the right connecting disc (42) is fixedly connected with the right ends of the connecting columns (43), a plurality of planetary gears (44) distributed along the circumferential direction are arranged between the left connecting disc (41) and the right connecting disc (42), bushings (45) are sleeved at the two ends of each planetary gear (44) and the bushings (45) at the two ends are correspondingly arranged in planetary gear mounting holes formed in the left connecting disc (41) and the right connecting disc (42); the front output gear (22) of the front output assembly (2) is arranged on the inner side of the plurality of planetary gears (44) and is meshed with the plurality of planetary gears (44), the front output shaft (21) of the front output assembly (2) extends out from the left side of the left connecting disc (41), the inner gear ring (32) of the rear output assembly (3) is sleeved on the outer side of the plurality of planetary gears (44) and is meshed with the plurality of planetary gears (44), the shell (1) is sleeved on the outer side of the inner gear ring (32) of the rear output assembly (3) and is fixedly connected with the left connecting disc (41) of the planetary gear assembly (4), and the rear output shaft (31) of the rear output assembly (3) extends out from the right side of the shell (1); a short sleeve (46) is further arranged on the left side of the left connecting disc (41) of the planetary gear assembly (4); a sun gear (23) is further arranged on a front output shaft (21) of the front output assembly (2) and the sun gear (23) is positioned on the left side of the short sleeve (46); the differential lock assembly is further provided with a differential lock assembly (5), wherein the differential lock assembly (5) comprises a sliding meshing sleeve (51), a differential shifting fork (52) and a driving device connected with the differential shifting fork (52); the sliding meshing sleeve (51) is sleeved on the sun gear (23) and enables the sun gear and the sun gear to be in sliding fit, and the left side of the short sleeve (46) and the right side of the sliding meshing sleeve (51) are provided with mutually matched joint teeth.
2. A transfer case differential mechanism according to claim 1, characterized in that the driving means includes a differential shift shaft (53), a differential piston (54), a differential plug screw (55), a differential cylinder head (56), a differential nut (57), a differential spring (58) and a differential dog (59).
3. A transfer case differential mechanism according to claim 2, characterized in that the right connecting disc (42) is fixedly connected with the connecting columns (43) by bolting, specifically, a first threaded hole is formed on the connecting columns (43), a first through hole corresponding to the first threaded hole is formed on the right connecting disc (42), and a plurality of first hinge bolts correspondingly penetrate through the first through hole of the right connecting disc (42) and are screwed in the first threaded hole of the connecting column (43).
4. A differential mechanism of a transfer case as claimed in claim 3, characterized in that the fixed connection of the casing (1) and the left connecting plate (41) is realized by bolting, specifically, a plurality of second threaded holes distributed along the circumferential direction are arranged at the left end of the casing (1), a second through hole corresponding to the second threaded hole is arranged on the left connecting plate (41), and a plurality of second hinge bolts correspondingly penetrate through the second through hole of the left connecting plate (41) and are screwed in the second threaded hole of the casing (1).
5. A transfer case differential mechanism according to claim 4, characterized in that the housing (1) is further connected to the left connecting disc (41) by a plurality of pins distributed circumferentially.
6. A transfer case differential mechanism according to any one of claims 1 to 5, characterized in that the bush (45) is made of low carbon steel and a bronze alloy is sintered to the surface of the bush (45).
7. A transfer case differential mechanism according to claim 6, characterized in that the bush (45) is provided at one end with a flange, and the bush (45) in the pinion mounting hole of the left and right flanges (41, 42) is pressed with its flange against the port wall of the pinion mounting hole opposite to the pinion (44).
CN201710461982.8A 2017-06-19 2017-06-19 Differential mechanism of transfer case Active CN107166008B (en)

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Application Number Priority Date Filing Date Title
CN201710461982.8A CN107166008B (en) 2017-06-19 2017-06-19 Differential mechanism of transfer case

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Application Number Priority Date Filing Date Title
CN201710461982.8A CN107166008B (en) 2017-06-19 2017-06-19 Differential mechanism of transfer case

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CN107166008B true CN107166008B (en) 2020-01-03

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111120616B (en) * 2019-12-30 2021-04-30 东风汽车有限公司 Mechanical time-sharing transfer case differential mechanism with gear ring structure
CN112576718A (en) * 2020-11-04 2021-03-30 东风越野车有限公司 High-power full-time transfer case differential mechanism and vehicle
CN114263719A (en) * 2021-11-19 2022-04-01 东风汽车零部件(集团)有限公司刃量具分公司 Transfer case differential mechanism of straight-tooth planetary gear needle roller assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677873A (en) * 1985-12-23 1987-07-07 Chrysler Motors Corporation Transfer case with inter-axle dual-planetary differential
US5409425A (en) * 1992-02-10 1995-04-25 Honda Giken Kogyo Kabushiki Kaisha Torque distributing mechanism in differential
CN2667240Y (en) * 2003-11-25 2004-12-29 荆州市巨鲸传动机械有限公司 Planetary speed reducer
US9126581B2 (en) * 2013-05-08 2015-09-08 GM Global Technology Operations LLC Hybrid powertrain and modular rear drive unit for same
CN104309473A (en) * 2014-10-08 2015-01-28 上海中科深江电动车辆有限公司 Planet speed reducer assembly for electric vehicle and electric vehicle
CN105889452B (en) * 2016-02-03 2018-06-22 北京精密机电控制设备研究所 A kind of dual input planetary gear train differential mechanism

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