CN202579892U - Compact limited slip differential - Google Patents
Compact limited slip differential Download PDFInfo
- Publication number
- CN202579892U CN202579892U CN 201120552153 CN201120552153U CN202579892U CN 202579892 U CN202579892 U CN 202579892U CN 201120552153 CN201120552153 CN 201120552153 CN 201120552153 U CN201120552153 U CN 201120552153U CN 202579892 U CN202579892 U CN 202579892U
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- differential
- planetary pinion
- gear
- slip differential
- gears
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Abstract
The utility model provides a compact limited slip differential, which comprises a shell and two half axle gears and six planetary gears which are rotationally fixed in the shell, and is characterized in that the two half axle gears are distributed on the left and right sides and are coaxially connected with each other; every three planetary gears are arranged in a group and are distributed on the left and right sides; the planetary gears on each side are uniformly distributed and are meshed with the half axle gear on the same side; every two planetary gears on two sides are meshed with each other; the half axle gears and the planetary gears are cylindrical helical gears; a thrust pad is arranged between the end of the corresponding side of the half axle gear on each side and the shell; and a thrust pad is arranged between the other side of the half axle gear on each side and the shell. The compact limited slip differential has the advantages of small size, compact structure and light weight, and compared with the common limited slip differential, the compact limited slip differential has the advantages that the length is shortened by about 70mm, the diameter is reduced by 30mm and the weight is lightened by about 1.5kg. The tooth surface friction and wear conditions are improved, the noise is reduced, and the transmission efficiency is improved.
Description
Technical field
The utility model belongs to a kind of mechanical transmission box of tricks, especially relates to a kind of limited-slip differential of compact structure.
Background technique
Differential mechanism is mainly used in the transmission system of automobile, and when there was speed discrepancy in left and right sidesing driving wheel, differential mechanism was distributed to the torque of slow-speed driving wheel greater than the fast torque of changeing driving wheel.Common differential drive gear is bevel gear (umbrella gear), also need set up friction plate to increase locking coefficient, and therefore, differential axle requires bigger to dimensional space.In some compact vehicles, the space of leaving differential mechanism for hour, this structure can't be arranged friction plate, then can not adopt the friction disk type limited-slip differential.
Summary of the invention
The problem that the utility model will solve provides that a kind of volume is little, the limited-slip differential of compact structure.
For solving the problems of the technologies described above; The technological scheme that the utility model adopts is: a kind of compact type limited-slip differential; Comprise housing and rotational fixation 2 differential gears and 6 planetary pinions in housing, it is characterized in that said 2 differential gear distribution left and right sides and concentric join; Planetary pinion per three be one group also be distributed in about 2 sides; The planetary pinion of every side evenly distribute and with the differential gear engagement of homonymy, the planetary pinion of both sides also is meshing with each other between any two, said differential gear and planetary pinion are cylindrical helical gear; Also be provided with thrust pad between the end of the differential gear respective side of each side and housing, also be provided with thrust pad between the planetary pinion opposite side of each side and housing.
Further, planetary pinion adopts twin drum shape toothing.
Further, said thrust pad is a copper packing.
Advantage and the good effect that the utlity model has are: owing to adopt technique scheme, volume is little, compact structure, in light weight, on length, shortens about 70mm than common limited slip differential, and the about 30mm of reduced alleviates about 1.5 kilograms qualitatively.Improve gear tooth friction, wear condition, reduced noise, transmission efficiency also increases.
Description of drawings
Fig. 1 is the assembling schematic representation of the utility model
Fig. 2 is the sectional view of the utility model
Fig. 3 is the stressed demonstration graph of right axle gear and planetary pinion and thrust pad
Fig. 4 is both sides differential gear and planetary pinion meshing relation schematic perspective view
Among the figure:
1, left side housing 2, left side planetary pinion 3, planetary pinion thrust pad
4, hexagon socket head cap screw 5, right axle gear 6, half shaft wheel thrust pad
7, right side housing 8, right side planetary pinion 9, left side differential gear
Embodiment
As shown in the figure; The utility model compact type limited-slip differential; Comprise left and right sides two-part composition housing and rotational fixation 2 differential gears and 6 planetary pinions in housing, have axis hole on the housing of the left and right sides and be used to lay corresponding differential gear and planetary pinion that said 2 differential gear distribution left and right sides and concentric join; Planetary pinion per three be one group also be distributed in about 2 sides; The planetary pinion of every side evenly distribute and with the differential gear engagement of homonymy, the planetary pinion of both sides also is meshing with each other between any two, said differential gear and planetary pinion are cylindrical helical gear; Also be provided with thrust pad between the end of the differential gear respective side of each side and housing; Also be provided with thrust pad between the planetary pinion opposite side of each side and housing, planetary thrust pad is in the present embodiment through the hexagon socket head cap screw tight butt planetary pinion end of screwing.
During cruising: automobile rotational speed passes to the differential mechanism gear ring via motor, clutch, speed changer, and the differential mechanism gear ring links to each other with differential casing 1,7.During cruising, left and right sides two halves wheel speed is identical, and the rotation of housing assembly drives three planetary pinion 2 corotation in left side; Planetary external tooth is stirred left side differential gear 9 and is rotated; This moment, the planetary pinion gear teeth were equivalent to key, did not have engagement between it and the half shaft wheel, and only simple revolution is transmitted and rotated.Three planetary gear revolution in the same endoceliac right side of shell, position, the gear teeth of planetary pinion 8 are stirred right axle gear 5 and are rotated.Whole differential mechanism keeps certain rotating speed, and all gears in housing and the internal structure do not have relative movement.At this moment, the axial force F x that the thrust pad 6 of each planetary thrust pad 3, differential gear produces when bearing each helical gear transmitting movement is in impaction state, shown in figure three, but does not have friction torque each other.In the present embodiment, the thrust pad 6 of planetary thrust pad 3 and differential gear all adopts copper product to make.
Annotate: Fx1 is the suffered axial force of planetary pinion copper packing among the figure three, and Fx2 is the suffered axial force of differential gear copper packing.
Two wheels meet adhesion and do not wait when differing than skid like a side greatly: have speed discrepancy between the two-wheeled of the left and right sides, differential gear and planetary pinion produce engagement relatively, because the effect of speed discrepancy and axial force produces friction torque between thrust copper packing and the gear.At the fast end of rotating speed, the direction and the driving moment of the friction torque of generation are in the opposite direction, so driving moment is little, its rotating speed are reduced; At the slow end of rotating speed, friction torque is identical with the direction of driving moment, and driving moment is big, makes it increase to enough towing motorcars and rolls the obstacle road surface away from.Like this, differential mechanism has just been accomplished the work of regulating, distributing driving moment voluntarily.
Two wheels meet adhesion and do not wait when differing than skid like a side greatly: have speed discrepancy between the two-wheeled of the left and right sides, differential gear and planetary pinion produce engagement relatively, because the effect of speed discrepancy and axial force produces friction torque between thrust copper packing and the gear.At the fast end of rotating speed, the direction and the driving moment of the friction torque of generation are in the opposite direction, so driving moment is little, its rotating speed are reduced; At the slow end of rotating speed, friction torque is identical with the direction of driving moment, and driving moment is big, makes it increase to enough towing motorcars and rolls the obstacle road surface away from.Like this, differential mechanism has just been accomplished the work of regulating, distributing driving moment voluntarily.
Shown in figure four, this limited slip differential internal structure is compact, and each gear can produce enough axial forces when all having bigger helix angle to have speed discrepancy with assurance and compress the thrust copper packing, and produces friction torque.In addition, in order to guarantee meshing quality, a skidding star gear has used the design of two crowned teeths, and we know that the bearing capacity of crowned teeth is higher by 15%～20% than straight-tooth, and under identical modulus, the number of teeth, crowned teeth is better than the contact precision of straight-tooth.Simultaneously, because drum-shaped tooth improves the contact conditions of gear, avoided the drawback that the extruding of straight-tooth increment seamed edge, stress are concentrated in the transmitting torque process.Improve gear tooth friction, wear condition, reduced noise.Transmission efficiency also increases.
The design space of differential mechanism receives in many ways that factor restricts, and axial length is about 80mm, the about 140mm of outside diameter; The cylindrical of differential gear with about each three planet wheel cylindrical by hole decision in the enclosure interior, should equal the big footpath of its internal spline in order to cooperate the centering size, these two sizes have determined the wall thickness of differential gear; The input torque of automobile is 136Nm, this conditional decision differential gear and planetary modulus, transverse tooth thickness etc.
More than the embodiment of the utility model is specified, but said content is merely the preferred embodiment of the utility model, can not be considered to be used to limit the practical range of the utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the utility model.
Claims (3)
1. compact type limited-slip differential; Comprise housing and rotational fixation 2 differential gears and 6 planetary pinions in housing, it is characterized in that said 2 differential gear distribution left and right sides and concentric join; Planetary pinion per three be one group also be distributed in about 2 sides; The planetary pinion of every side evenly distribute and with the differential gear engagement of homonymy, the planetary pinion of both sides also is meshing with each other between any two, said differential gear and planetary pinion are cylindrical helical gear; Also be provided with thrust pad between the end of the differential gear respective side of each side and housing, also be provided with thrust pad between the planetary pinion opposite side of each side and housing.
2. compact type limited-slip differential according to claim 1 is characterized in that: planetary pinion adopts twin drum shape toothing.
3. compact type limited-slip differential according to claim 1 is characterized in that: said thrust pad is a copper packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120552153 CN202579892U (en) | 2011-12-26 | 2011-12-26 | Compact limited slip differential |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120552153 CN202579892U (en) | 2011-12-26 | 2011-12-26 | Compact limited slip differential |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579892U true CN202579892U (en) | 2012-12-05 |
Family
ID=47249306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120552153 Expired - Fee Related CN202579892U (en) | 2011-12-26 | 2011-12-26 | Compact limited slip differential |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202579892U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807405A (en) * | 2014-03-06 | 2014-05-21 | 唐山爱特精密机器制造有限公司 | Helical tooth limited slip differential with automatic locking function |
| CN105909757A (en) * | 2016-07-08 | 2016-08-31 | 天津天海同步科技有限公司 | Compact type differential |
| CN107795659A (en) * | 2017-11-21 | 2018-03-13 | 中国第汽车股份有限公司 | A kind of new penetrating bridge inter-axle differential structure |
| CN108700173A (en) * | 2016-03-03 | 2018-10-23 | 奥迪股份公司 | Differential mechanism for motor vehicle |
| CN113958681A (en) * | 2021-09-28 | 2022-01-21 | 东风汽车零部件(集团)有限公司刃量具分公司 | Large helical angle gear type limited slip differential |
-
2011
- 2011-12-26 CN CN 201120552153 patent/CN202579892U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807405A (en) * | 2014-03-06 | 2014-05-21 | 唐山爱特精密机器制造有限公司 | Helical tooth limited slip differential with automatic locking function |
| CN103807405B (en) * | 2014-03-06 | 2016-03-30 | 唐山爱特精密机器制造有限公司 | There is the helical tooth limited-slip differential of automatic locking function |
| CN108700173A (en) * | 2016-03-03 | 2018-10-23 | 奥迪股份公司 | Differential mechanism for motor vehicle |
| CN108700173B (en) * | 2016-03-03 | 2021-11-23 | 奥迪股份公司 | Differential for motor vehicle |
| CN105909757A (en) * | 2016-07-08 | 2016-08-31 | 天津天海同步科技有限公司 | Compact type differential |
| CN107795659A (en) * | 2017-11-21 | 2018-03-13 | 中国第汽车股份有限公司 | A kind of new penetrating bridge inter-axle differential structure |
| CN107795659B (en) * | 2017-11-21 | 2024-01-12 | 中国第一汽车股份有限公司 | Novel through axle interaxle differential mechanism structure |
| CN113958681A (en) * | 2021-09-28 | 2022-01-21 | 东风汽车零部件(集团)有限公司刃量具分公司 | Large helical angle gear type limited slip differential |
| CN113958681B (en) * | 2021-09-28 | 2024-05-28 | 东风汽车零部件(集团)有限公司刃量具分公司 | Large helical angle gear type limited slip differential |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20141226 |
|
| EXPY | Termination of patent right or utility model |