CN113958681A - Large helical angle gear type limited slip differential - Google Patents
Large helical angle gear type limited slip differential Download PDFInfo
- Publication number
- CN113958681A CN113958681A CN202111142153.6A CN202111142153A CN113958681A CN 113958681 A CN113958681 A CN 113958681A CN 202111142153 A CN202111142153 A CN 202111142153A CN 113958681 A CN113958681 A CN 113958681A
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- gear
- gears
- limited slip
- shell
- slip differential
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Links
- 230000007246 mechanism Effects 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 33
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/28—Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a large helix angle gear type limited slip differential, which comprises a shell and two half axle gears, wherein the two half axle gears are respectively positioned at two ends of the shell, and each half axle gear is provided with a plurality of planetary gears meshed with the half axle gear; the two half axle gears arranged in the half axle mounting holes of the shell are coaxial and have opposite rotation directions; planetary gears on the same side are uniformly distributed in planetary mounting holes on the shell, and the axes of the planetary gears with different rotation directions are adjacent; the two half shaft gears and the plurality of planet gears are arranged in the shell through end covers. The differential mechanism has the locking coefficient of 0.6 and the torque ratio of 3.5, solves the problem that the existing spiral tooth limited slip differential mechanism cannot be adapted to medium and heavy off-road vehicles, and has the advantages of light weight, easy processing of parts, low cost and light weight.
Description
Technical Field
The invention belongs to the technical field of automobile transmission part assemblies, particularly relates to a differential mechanism, and particularly relates to a large helix angle gear type limited slip differential mechanism.
Background
The existing spiral gear limited slip differential has the problems of small locking coefficient, low limited slip capacity, poor vehicle off-road property and the like, is only suitable for being assembled on a light automobile, and the mechanical lock type spiral gear limited slip differential has the problems of more parts, complex process, high production and maintenance cost and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a helical angle gear type limited slip differential which has strong limited slip capability and improves the off-road performance of a vehicle.
In order to achieve the purpose, the helical angle gear type limited slip differential designed by the invention is characterized in that: the planetary gear set comprises a shell and two half shaft gears which are respectively positioned at two ends of the shell, wherein each half shaft gear is provided with a plurality of planetary gears meshed with the half shaft gear;
the two half axle gears arranged in the half axle mounting holes of the shell are coaxial and have opposite rotation directions; planetary gears on the same side are uniformly distributed in planetary mounting holes on the shell, and the axes of the planetary gears with different rotation directions are adjacent;
the two half shaft gears and the plurality of planet gears are arranged in the shell through end covers.
Preferably, the planet mounting hole is a blind hole.
Preferably, the helix angle of the side gear is 48 °.
Preferably, the thickness of the side gear is smaller than that of the planetary gear.
Preferably, each of the side gears is meshed with three planetary gears.
Preferably, the bottom of each half shaft mounting hole is provided with a plurality of first U-shaped oil grooves communicated with the shaft hole.
Further preferably, the bottom of each half shaft mounting hole is provided with three first U-shaped oil grooves, and the central line of each first U-shaped oil groove is intersected with the axis of one planetary gear and the axis of the half shaft gear on the same side.
Preferably, the periphery of the end cover is provided with a plurality of segmental oil inlets, and the segmental oil inlets are positioned above the planetary gear.
Preferably, a second U-shaped oil groove communicated with the outside is formed in the middle of each segmental oil inlet; and a plurality of third U-shaped oil grooves are formed in the inner periphery of the end cover.
Further preferably, the center line of each second U-shaped oil groove has a center line of a third U-shaped oil groove coinciding therewith.
Still more preferably, the number of the second U-shaped oil grooves is the same as the number of the third U-shaped oil grooves.
Preferably, a plurality of through oil holes are uniformly distributed in the end cover, and the through oil holes are used for communicating the half shaft mounting hole with the outside of the shell.
The invention has the beneficial effects that: the half axle gear is of a large helix angle parameter structure, has large locking coefficient and strong limited slip capability, widens the application range of the helical gear type limited slip differential, and is suitable for being configured on medium-sized off-road vehicles;
the oil inlet, the U-shaped oil groove and the straight-through oil hole provide lubrication for the half axle gear and the planetary gear, so that the abrasion of a gear pair is reduced, the heat effect balance is achieved, and the lubricating and heat dissipating effects are good;
the half shaft gear and the planetary gear are respectively installed from two ends of the shell, so that the assembly is simple and convenient, the labor intensity of operators is low, and the production efficiency is high.
The differential mechanism has the locking coefficient of 0.6 and the torque ratio of 3.5, solves the problem that the existing spiral tooth limited slip differential mechanism cannot be adapted to medium and heavy off-road vehicles, and has the advantages of light weight, easy processing of parts, low cost and light weight.
Drawings
FIG. 1 is a schematic structural view of the present invention
FIG. 2 is a schematic view of the gear of the present invention
FIG. 3 is a schematic view of the structure of the housing of the present invention
FIG. 4 is a schematic view of the end cap structure of the present invention
Detailed Description
The technical solutions of the present invention (including the preferred ones) are described in further detail below by means of fig. 1 to 4 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in FIGS. 1 to 4, the helical angle gear type limited slip differential designed by the invention comprises a shell 1, two side gears 2 respectively positioned at two ends of the shell, wherein each side gear 2 is provided with a plurality of planetary gears 3 meshed with the side gear; two half shaft gears 2 which are arranged in the half shaft mounting holes 1.1 of the shell 1 are coaxial and have opposite rotation directions; the planet gears 3 on the same side are uniformly distributed in planet mounting holes 1.2 on the shell 1, and the axes of the planet gears 3 with different rotation directions are adjacent; the two side gears 2 and the plurality of planetary gears 3 are mounted in the case 1 by bolts 5 through end covers 4.
The planet mounting holes 1.2 are blind holes. In this embodiment the housing 1 is provided with three planet mounting apertures 1.2 at each end and they are spaced 120 apart. In this embodiment, the axes of the six planet mounting holes 1.2 are not coincident and are uniformly distributed in the circumferential direction.
The helical angle of the side gear is 48 degrees, the locking coefficient is large, the limited slip capacity of the limited slip differential is improved, the locking coefficient is 0.6, and the torque ratio is 3.5.
The thickness of the side gear 2 is smaller than that of the planetary gear 3. Each half axle gear 2 is meshed with three planetary gears 3;
the bottom of each half shaft mounting hole 1.1 is provided with three first U-shaped oil grooves 7 communicated with the shaft hole 6. The center line of each first U-shaped oil groove 7 intersects with the axis of one planetary gear 3 and the axis of the side gear 2 on the same side. That is, the first U-shaped oil groove 7 and the side gear 3 are in the radial direction of the planetary gear 3. First U type oil groove 7 is used for the lubrication of 2 friction terminal surfaces of side gear, and first U type oil groove does not communicate with each other with the planetary gear mounting hole, avoids cutter export burr to generate, improves the assembly precision.
The periphery of the end cover 4 is provided with a plurality of segmental oil inlets 8, and the segmental oil inlets 8 are positioned above the planetary gear 3. The middle part of each segmental oil inlet 8 is provided with a second U-shaped oil groove 9 communicated with the outside; and a plurality of third U-shaped oil grooves 10 are formed in the inner periphery of the end cover 4. The central line of each second U-shaped oil groove 9 has the central line of a third U-shaped oil groove 10 coincident therewith, and the number of the second U-shaped oil grooves 9 is the same as that of the third U-shaped oil grooves 10. The end cover 4 is also evenly provided with a plurality of straight oil holes 11, and the half shaft mounting holes 1.1 are communicated with the outside of the shell 1 through the straight oil holes 11. So, be used for the lubricated of helical gear pair friction, the residue that helical gear pair wearing and tearing produced can be discharged to the straight-through oilhole simultaneously, and lubricating oil can play the cleaning action, and three kinds of structural design provide the way for helical gear pair lubrication and limited slip differential flowing back.
The shell 1 and the end cover 3 are made of 42CrMo materials, and a nitriding heat treatment process is adopted, so that the surface hardness reaches 550-600Hv, the surface wear resistance is good, and the service life is long.
The two half shaft gears 2 are of a symmetrical structure, the heat treatment deformation is small, and the gear precision is high after heat treatment.
The power from the parts such as the bevel gear is transmitted to the differential shell, the differential shell drives the planetary gear to rotate, and the planetary gear drives the half axle gear meshed with the planetary gear to rotate, so that the power transmission is realized. When the vehicle runs in a straight line, the rotating speeds of the planet gears and the side gears are equal to the rotating speed of the differential case, at the moment, the planet gears and the corresponding side gears do not rotate relatively, the differential case and the side gears rotate integrally, and the torque distributed to the left side gear and the right side gear from the differential case is divided equally. When the vehicle turns, the left planet gear and the right planet gear rotate relatively, the rotating direction of the fast rotating side is consistent with the accelerated rotation of the corresponding side half shaft gear, and the rotating direction of the slow rotating side is consistent with the slow rotation of the corresponding side half shaft gear, so that the vehicle turns; the fast-rotating side half axle gear enables the fast-rotating side planetary gear to rotate, so that the slow-rotating side planetary gear is forced to drive the slow-rotating side half axle gear to rotate, friction force is generated between tooth surfaces, the increase of the rotating speed of the slow-rotating side planetary gear is limited, the increase of the rotating speed of the fast-rotating side planetary gear and the fast-rotating side half axle gear is prevented, and the limited slip effect on the fast-rotating side driving wheel is achieved.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.
Claims (10)
1. A large helix angle gear type limited slip differential is characterized in that: the planetary gear set comprises a shell and two half shaft gears which are respectively positioned at two ends of the shell, wherein each half shaft gear is provided with a plurality of planetary gears meshed with the half shaft gear; the two half axle gears arranged in the half axle mounting holes of the shell are coaxial and have opposite rotation directions; planetary gears on the same side are uniformly distributed in planetary mounting holes on the shell, and the axes of the planetary gears with different rotation directions are adjacent; the two half shaft gears and the plurality of planet gears are arranged in the shell through end covers.
2. The large helix angle, gear-type limited slip differential of claim 1, wherein: the planet mounting holes are blind holes.
3. The large helix angle, gear-type limited slip differential of claim 1, wherein: the helix angle of the side gear is 48 °.
4. The large helix angle, gear-type limited slip differential of claim 1, wherein: the thickness of the side gear is smaller than that of the planetary gear.
5. The large helix angle, gear-type limited slip differential of claim 1, wherein: each of the side gears is meshed with three planetary gears.
6. The large helix angle, gear-type limited slip differential of claim 1, wherein: every the bottom of semi-axis mounting hole is equipped with a plurality of first U type oil grooves with the shaft hole intercommunication.
7. The large helix angle, gear-type limited slip differential of claim 6, wherein: the bottom of each half shaft mounting hole is provided with three first U-shaped oil grooves, and the central line of each first U-shaped oil groove is intersected with the axis of a planetary gear and the axis of a half shaft gear on the same side.
8. The large helix angle, gear-type limited slip differential of claim 1, wherein: the periphery of the end cover is provided with a plurality of segmental oil inlets, and the segmental oil inlets are located above the planetary gear.
9. The large helix angle, gear-type limited slip differential of claim 8, wherein: the middle part of each segmental oil inlet is provided with a second U-shaped oil groove communicated with the outside; a plurality of third U-shaped oil grooves are formed in the inner periphery of the end cover; the center line of each second U-shaped oil groove is superposed with the center line of a third U-shaped oil groove; the number of the second U-shaped oil grooves is the same as that of the third U-shaped oil grooves.
10. The large helix angle, gear-type limited slip differential of claim 1, wherein: and a plurality of through oil holes are uniformly distributed on the end cover, and the through oil holes are used for communicating the half shaft mounting hole with the outside of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111142153.6A CN113958681B (en) | 2021-09-28 | 2021-09-28 | Large helical angle gear type limited slip differential |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111142153.6A CN113958681B (en) | 2021-09-28 | 2021-09-28 | Large helical angle gear type limited slip differential |
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| CN113958681A true CN113958681A (en) | 2022-01-21 |
| CN113958681B CN113958681B (en) | 2024-05-28 |
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| CN202111142153.6A Active CN113958681B (en) | 2021-09-28 | 2021-09-28 | Large helical angle gear type limited slip differential |
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2021
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| CN113958681B (en) | 2024-05-28 |
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