CN203023426U - Cylindrical gear power-shunting type limited slip differential - Google Patents
Cylindrical gear power-shunting type limited slip differential Download PDFInfo
- Publication number
- CN203023426U CN203023426U CN 201320014115 CN201320014115U CN203023426U CN 203023426 U CN203023426 U CN 203023426U CN 201320014115 CN201320014115 CN 201320014115 CN 201320014115 U CN201320014115 U CN 201320014115U CN 203023426 U CN203023426 U CN 203023426U
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- China
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- planetary
- gear set
- planetary gear
- sun gear
- slip differential
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Abstract
The utility model provides a cylindrical gear power-shunting type limited slip differential. The cylindrical gear power-shunting type limited slip differential comprises a first shell, a second shell, a first sun gear and a second sun gear, wherein the first sun gear and the second sun gear are arranged coaxially; a first planetary gear set is evenly arranged at the periphery of the first sun gear; a second planetary gear set is evenly arranged at the periphery of the second sun gear; the planetary gears in the first planetary gear set and the second planetary gear set are arranged at intervals; any one planetary gear in the first planetary gear set is meshed with two adjacent planetary gears in the second planetary gear set; and any one planetary gear in the second planetary gear set is meshed with two adjacent planetary gears in the first planetary gear set. The limited slip differential has the beneficial effects that the first planetary gear set and the second planetary gear set are meshed in a staggered way so as to play a power shunting role, and therefore, the gear stress is reduced, the wear of shell cavities and the planetary gears is reduced, and the service life of the limited slip differential is prolonged.
Description
Technical field
The utility model belongs to a kind of mechanical transmission box of tricks, especially relates to the limited-slip differential that a kind of power can be shunted.
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 torque that turns soon driving wheel.When the planetary pinion of tradition cylinder screw gear type limited-slip differential and planetary pinion engagement, main passive planetary pinion is 1, because not shunting of power, when making engagement, gear tooth stresses is large, and the life-span is short.
The model utility content
Problem to be solved in the utility model is to provide the staggered engagement of a kind of planetary pinion, and is stressed even, reaches the effect of dynamic branch, extends the limited-slip differential in planetary pinion life-span.
For solving the problems of the technologies described above, the technical solution of the utility model is:
a kind of cylindrical gears dynamic branch formula limited-slip differential, comprise the first housing and the second housing, described the first enclosure interior is provided with the first sun gear, described the second enclosure interior is provided with the second sun gear, described the first sun gear and described the second coaxial setting of sun gear, described the first sun gear periphery evenly is provided with the first planetary gear set that is meshed with the first sun gear, described the second sun gear periphery evenly is provided with the second planetary gear set that is meshed with the second sun gear, the planetary pinion interval setting of described the first planetary gear set and described the second planetary gear set, and two planetary pinions adjacent in the arbitrary planetary pinion in described the first planetary gear set and described the second planetary gear set are meshed, two planetary pinions adjacent in arbitrary planetary pinion in described the second planetary gear set and described the first planetary gear set are meshed.
Included 4-6 planetary pinion in described the first planetary gear set and described the second planetary gear set.
5 planetary pinions have been included in described the first planetary gear set and described the second planetary gear set.
Be provided with the planetary pinion setting sleeve between each planetary pinion in described the first sun gear and described the first planetary gear set, be provided with the planetary pinion setting sleeve between each planetary pinion in described the second sun gear and described the second planetary gear set, be equipped with thrust block in described planetary pinion setting sleeve.
Described thrust block contains 2 taper cushions and 3 plane pads.
Described the second housing is provided with the mileage gauge stand.
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, each planetary pinion in the first planetary gear set and the second planetary gear set has two planetary pinions that match to be meshed, make any planetary pinion stressed evenly, realize the even of transmission of power, so just reduced the planetary pinion gear tooth stresses, also reduce housing inner chamber and planetary wearing and tearing, improved the life-span of limited-slip differential assembly.
Description of drawings
Fig. 1 is assembling schematic diagram of the present utility model
Fig. 2 is sectional view of the present utility model
Fig. 3 is the utility model the first sun gear, the first planetary gear set, the second planetary gear set and the second sun gear meshing relation schematic perspective view
In figure:
1, the first housing 2, the first planetary gear set 3, the second housing
4, mileage gauge stand 5, the second sun gear 6, the second planetary gear set
7, planetary pinion setting sleeve 8, thrust block 9, plane pad
10, taper cushion 11, the first sun gear
Embodiment
as Figure 1-3, cylindrical gears dynamic branch formula limited-slip differential of the present utility model, comprise the first housing 1 and the second housing 3, described the first housing 1 inside is provided with the first sun gear 11, described the second housing 3 inside are provided with the second sun gear 5, described the first sun gear 11 and described the second coaxial setting of sun gear 5, described the first sun gear 11 peripheries evenly are provided with the first planetary gear set 2 that is meshed with the first sun gear 11, described the second sun gear 5 peripheries evenly are provided with the second planetary gear set 6 that is meshed with the second sun gear 5, the planetary pinion interval setting of described the first planetary gear set 2 and described the second planetary gear set 6, and two planetary pinions adjacent in the arbitrary planetary pinion in described the first planetary gear set 2 and described the second planetary gear set 6 are meshed, two planetary pinions adjacent in arbitrary planetary pinion in described the second planetary gear set 6 and described the first planetary gear set 2 are meshed.
Included 4-6 planetary pinion in described the first planetary gear set 2 and described the second planetary gear set 6.
In the present embodiment, 5 planetary pinions have been included in the first planetary gear set 2 and the second planetary gear set 6.
Be provided with planetary pinion setting sleeve 7 between each planetary pinion in described the first sun gear 5 and described the first planetary gear set 2, be provided with planetary pinion setting sleeve 7 between each planetary pinion in described the second sun gear 5 and described the second planetary gear set 6, be equipped with thrust block 8 in described planetary pinion setting sleeve 7.Be mated by spline joint by 2 thrust blocks 8 in described planetary pinion setting sleeve 7 and install and use, two thrust blocks 8 include 2 taper cushions 10 and 3 plane pads 9, be mainly used in adjusting axial clearance, sun gear and planetary pinion are better meshed, obtain meshing zone preferably.
In the present embodiment, the second housing 3 is provided with mileage gauge stand 4.
Described planetary pinion adopts the Double drum type toothing.Crowned teeth is higher than the bearing capacity of straight-tooth, and contact precision will be got well.Simultaneously, improve because drum-shaped tooth makes 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.
Planetary pinion can be quaternion or six one group, needn't be five one group, and the number that planetary pinion is every group is according to the product space design and sun gear is big or small decides.
When normally travelling: automobile rotational speed passes to the differential mechanism gear ring via motor, clutch, speed changer, and the differential mechanism gear ring is connected with differential casing (the first housing 1, the second housing 3).When normally travelling, left and right two vehicle wheel rotational speeds are identical, 5 planetary pinions that the rotation of housing assembly drives the first planetary gear set 2 rotate jointly, the planetary external tooth of the first planetary gear set 2 is stirred the first sun gear 11 and is rotated, this moment, the planetary pinion gear teeth were equivalent to key, there is no engagement between it and sun gear, only simple revolution is transmitted and is rotated.Be positioned at equally 5 planetary pinion revolution of endoceliac the second planetary gear set 6 of shell, the planetary gear teeth of the second planetary gear set 6 are stirred the second sun gear 5 and are rotated.Whole differential mechanism keeps certain rotating speed, and all gears in housing and internal structure are without relative movement.At this moment, the axial force that housing produces when bearing each cylindrical screw gear transmission motion is in impaction state, but mutually there is no friction torque.
Two wheels meet that adhesion does not wait or when differing larger the road surface and skidding as a side: have speed discrepancy between two wheels of left and right, sun gear is relative with planetary pinion produces engagement, due to the effect of speed discrepancy and axial force, produces friction torque between housing and planetary pinion.At the fast end of rotating speed, the direction of the friction torque of generation and driving moment opposite direction therefore driving moment is little, reduce its rotating speed; At the slow end of rotating speed, friction torque is identical with the direction of driving moment, and driving moment is large, makes it increase to enough towing motorcars and rolls the obstacle road surface away from.Like this, differential mechanism has just been completed the work of regulating voluntarily, distributing driving moment.Simultaneously because 2 planetary pinions adjacent with its (single planetary pinion) in any single planetary pinion in the first planetary gear set 2 or the second planetary gear set 6 and another group are intermeshing, make its (single planetary pinion) power evenly pass to 2 planetary pinions of other a group, that is to say and reduced the planetary pinion gear tooth stresses, improved the planetary life-span.
As shown in Figure 3, this limited-slip differential internal structure is compact, and parts are more, and each gear can produce enough axial forces and friction torque when all having larger helix angle to have speed discrepancy with assurance.The design space of differential mechanism is subjected in many ways that factor restricts, and axial length is about 180mm, and outside diameter is 168mm approximately, and designing and developing dynamic branch formula limited-slip differential has certain difficulty.After designing and calculating repeatedly, former differential casing is divided into two, and is connected by seam; The cylindrical of sun gear coordinates with hole in enclosure interior; Housing coordinates with planetary pinion, and play positioning action with the planetary pinion setting sleeve jointly; The input torque of automobile is 186Nm, this conditional decision sun gear and planetary intensity, also just determined its modulus, transverse tooth thickness etc.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiments of the present utility model, can not think only to be defined in practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., within all should still belonging to patent covering scope of the present utility model.
Claims (6)
1. cylindrical gears dynamic branch formula limited-slip differential, comprise the first housing and the second housing, described the first enclosure interior is provided with the first sun gear, described the second enclosure interior is provided with the second sun gear, described the first sun gear and described the second coaxial setting of sun gear, it is characterized in that, described the first sun gear periphery evenly is provided with the first planetary gear set that is meshed with described the first sun gear, described the second sun gear periphery evenly is provided with the second planetary gear set that is meshed with described the second sun gear, the planetary pinion interval setting of described the first planetary gear set and described the second planetary gear set, and two planetary pinions adjacent in the arbitrary planetary pinion in described the first planetary gear set and described the second planetary gear set are meshed, two planetary pinions adjacent in arbitrary planetary pinion in described the second planetary gear set and described the first planetary gear set are meshed.
2. cylindrical gears dynamic branch formula limited-slip differential according to claim 1, is characterized in that: included 4-6 planetary pinion in described the first planetary gear set and described the second planetary gear set.
3. cylindrical gears dynamic branch formula limited-slip differential according to claim 2, is characterized in that: included 5 planetary pinions in described the first planetary gear set and described the second planetary gear set.
4. cylindrical gears dynamic branch formula limited-slip differential according to claim 3, it is characterized in that: be provided with the planetary pinion setting sleeve between each planetary pinion in described the first sun gear and described the first planetary gear set, be provided with the planetary pinion setting sleeve between each planetary pinion in described the second sun gear and described the second planetary gear set, be equipped with thrust block in described planetary pinion setting sleeve.
5. cylindrical gears dynamic branch formula limited-slip differential according to claim 4, it is characterized in that: described thrust block contains 2 taper cushions and 3 plane pads.
6. cylindrical gears dynamic branch formula limited-slip differential according to claim 1, it is characterized in that: described the second housing is provided with the mileage gauge stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320014115 CN203023426U (en) | 2013-01-09 | 2013-01-09 | Cylindrical gear power-shunting type limited slip differential |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320014115 CN203023426U (en) | 2013-01-09 | 2013-01-09 | Cylindrical gear power-shunting type limited slip differential |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203023426U true CN203023426U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320014115 Expired - Lifetime CN203023426U (en) | 2013-01-09 | 2013-01-09 | Cylindrical gear power-shunting type limited slip differential |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203023426U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697138A (en) * | 2013-12-30 | 2014-04-02 | 郑州精益达汽车零部件有限公司 | Differential for passenger car |
| CN107355525A (en) * | 2017-06-12 | 2017-11-17 | 湖北航天技术研究院特种车辆技术中心 | A kind of differential mechanism |
| CN109442018A (en) * | 2018-12-28 | 2019-03-08 | 湖北航天技术研究院特种车辆技术中心 | A kind of asymmetric no-spin lockup |
-
2013
- 2013-01-09 CN CN 201320014115 patent/CN203023426U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697138A (en) * | 2013-12-30 | 2014-04-02 | 郑州精益达汽车零部件有限公司 | Differential for passenger car |
| CN107355525A (en) * | 2017-06-12 | 2017-11-17 | 湖北航天技术研究院特种车辆技术中心 | A kind of differential mechanism |
| CN109442018A (en) * | 2018-12-28 | 2019-03-08 | 湖北航天技术研究院特种车辆技术中心 | A kind of asymmetric no-spin lockup |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 301600 Jinhai Road, Jinghai Development Zone, Jinghai County, Tianjin 5 Patentee after: TIANJIN TANHAS TECHNOLOGY Co.,Ltd. Address before: 301600 Jinhai Road, Jinghai Development Zone, Jinghai County, Tianjin 5 Patentee before: TIANJIN TANHAS TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |